./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 f470102c Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_64af9160-e4a3-4fa9-ba66-a5536c4ce182/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_64af9160-e4a3-4fa9-ba66-a5536c4ce182/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_64af9160-e4a3-4fa9-ba66-a5536c4ce182/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_64af9160-e4a3-4fa9-ba66-a5536c4ce182/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive-simple/sum_20x0-2.c -s /tmp/vcloud-vcloud-master/worker/run_dir_64af9160-e4a3-4fa9-ba66-a5536c4ce182/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_64af9160-e4a3-4fa9-ba66-a5536c4ce182/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 0.1.25-f470102 [2019-12-07 12:04:59,640 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-12-07 12:04:59,641 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-12-07 12:04:59,650 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-12-07 12:04:59,650 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-12-07 12:04:59,651 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-12-07 12:04:59,652 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-12-07 12:04:59,653 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-12-07 12:04:59,655 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-12-07 12:04:59,655 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-12-07 12:04:59,656 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-12-07 12:04:59,657 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-12-07 12:04:59,657 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-12-07 12:04:59,657 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-12-07 12:04:59,658 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-12-07 12:04:59,659 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-12-07 12:04:59,659 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-12-07 12:04:59,660 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-12-07 12:04:59,661 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-12-07 12:04:59,663 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-12-07 12:04:59,664 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-12-07 12:04:59,664 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-12-07 12:04:59,665 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-12-07 12:04:59,666 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-12-07 12:04:59,667 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-12-07 12:04:59,667 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-12-07 12:04:59,668 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-12-07 12:04:59,668 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-12-07 12:04:59,668 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-12-07 12:04:59,669 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-12-07 12:04:59,669 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-12-07 12:04:59,669 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-12-07 12:04:59,670 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-12-07 12:04:59,670 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-12-07 12:04:59,671 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-12-07 12:04:59,671 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-12-07 12:04:59,671 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-12-07 12:04:59,671 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-12-07 12:04:59,672 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-12-07 12:04:59,672 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-12-07 12:04:59,672 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-12-07 12:04:59,673 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_64af9160-e4a3-4fa9-ba66-a5536c4ce182/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-12-07 12:04:59,682 INFO L113 SettingsManager]: Loading preferences was successful [2019-12-07 12:04:59,683 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-12-07 12:04:59,683 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-12-07 12:04:59,683 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-12-07 12:04:59,684 INFO L138 SettingsManager]: * Use SBE=true [2019-12-07 12:04:59,684 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-12-07 12:04:59,684 INFO L138 SettingsManager]: * sizeof long=4 [2019-12-07 12:04:59,684 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-12-07 12:04:59,684 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-12-07 12:04:59,684 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-12-07 12:04:59,684 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-12-07 12:04:59,685 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-12-07 12:04:59,685 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-12-07 12:04:59,685 INFO L138 SettingsManager]: * sizeof long double=12 [2019-12-07 12:04:59,685 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-12-07 12:04:59,685 INFO L138 SettingsManager]: * Use constant arrays=true [2019-12-07 12:04:59,685 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-12-07 12:04:59,685 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-12-07 12:04:59,686 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-12-07 12:04:59,686 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-12-07 12:04:59,686 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-12-07 12:04:59,686 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-12-07 12:04:59,686 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-12-07 12:04:59,686 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-12-07 12:04:59,686 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-12-07 12:04:59,686 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-12-07 12:04:59,686 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-12-07 12:04:59,687 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-12-07 12:04:59,687 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2019-12-07 12:04:59,687 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_64af9160-e4a3-4fa9-ba66-a5536c4ce182/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 [2019-12-07 12:04:59,787 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-12-07 12:04:59,795 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-12-07 12:04:59,798 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-12-07 12:04:59,798 INFO L271 PluginConnector]: Initializing CDTParser... [2019-12-07 12:04:59,799 INFO L275 PluginConnector]: CDTParser initialized [2019-12-07 12:04:59,799 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_64af9160-e4a3-4fa9-ba66-a5536c4ce182/bin/uautomizer/../../sv-benchmarks/c/recursive-simple/sum_20x0-2.c [2019-12-07 12:04:59,839 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_64af9160-e4a3-4fa9-ba66-a5536c4ce182/bin/uautomizer/data/1afd2e416/fec6f403132443299bc5964492e7e6b2/FLAG02cd25e21 [2019-12-07 12:05:00,304 INFO L306 CDTParser]: Found 1 translation units. [2019-12-07 12:05:00,304 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_64af9160-e4a3-4fa9-ba66-a5536c4ce182/sv-benchmarks/c/recursive-simple/sum_20x0-2.c [2019-12-07 12:05:00,308 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_64af9160-e4a3-4fa9-ba66-a5536c4ce182/bin/uautomizer/data/1afd2e416/fec6f403132443299bc5964492e7e6b2/FLAG02cd25e21 [2019-12-07 12:05:00,317 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_64af9160-e4a3-4fa9-ba66-a5536c4ce182/bin/uautomizer/data/1afd2e416/fec6f403132443299bc5964492e7e6b2 [2019-12-07 12:05:00,319 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-12-07 12:05:00,320 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-12-07 12:05:00,320 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-12-07 12:05:00,320 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-12-07 12:05:00,323 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-12-07 12:05:00,323 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 12:05:00" (1/1) ... [2019-12-07 12:05:00,325 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6ec38a18 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:05:00, skipping insertion in model container [2019-12-07 12:05:00,325 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 12:05:00" (1/1) ... [2019-12-07 12:05:00,329 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-12-07 12:05:00,339 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-12-07 12:05:00,432 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 12:05:00,434 INFO L203 MainTranslator]: Completed pre-run [2019-12-07 12:05:00,474 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 12:05:00,483 INFO L208 MainTranslator]: Completed translation [2019-12-07 12:05:00,484 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:05:00 WrapperNode [2019-12-07 12:05:00,484 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-12-07 12:05:00,484 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-12-07 12:05:00,484 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-12-07 12:05:00,485 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-12-07 12:05:00,490 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:05:00" (1/1) ... [2019-12-07 12:05:00,493 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:05:00" (1/1) ... [2019-12-07 12:05:00,504 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-12-07 12:05:00,504 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-12-07 12:05:00,504 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-12-07 12:05:00,504 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-12-07 12:05:00,510 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:05:00" (1/1) ... [2019-12-07 12:05:00,510 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:05:00" (1/1) ... [2019-12-07 12:05:00,510 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:05:00" (1/1) ... [2019-12-07 12:05:00,511 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:05:00" (1/1) ... [2019-12-07 12:05:00,512 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:05:00" (1/1) ... [2019-12-07 12:05:00,513 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:05:00" (1/1) ... [2019-12-07 12:05:00,513 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:05:00" (1/1) ... [2019-12-07 12:05:00,514 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-12-07 12:05:00,514 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-12-07 12:05:00,514 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-12-07 12:05:00,514 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-12-07 12:05:00,515 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:05:00" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_64af9160-e4a3-4fa9-ba66-a5536c4ce182/bin/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-12-07 12:05:00,553 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-12-07 12:05:00,553 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-12-07 12:05:00,553 INFO L130 BoogieDeclarations]: Found specification of procedure sum [2019-12-07 12:05:00,553 INFO L138 BoogieDeclarations]: Found implementation of procedure sum [2019-12-07 12:05:00,648 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-12-07 12:05:00,648 INFO L287 CfgBuilder]: Removed 4 assume(true) statements. [2019-12-07 12:05:00,649 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 12:05:00 BoogieIcfgContainer [2019-12-07 12:05:00,649 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-12-07 12:05:00,649 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-12-07 12:05:00,650 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-12-07 12:05:00,651 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-12-07 12:05:00,652 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.12 12:05:00" (1/3) ... [2019-12-07 12:05:00,652 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@120d0bb8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 12:05:00, skipping insertion in model container [2019-12-07 12:05:00,652 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:05:00" (2/3) ... [2019-12-07 12:05:00,653 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@120d0bb8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 12:05:00, skipping insertion in model container [2019-12-07 12:05:00,653 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 12:05:00" (3/3) ... [2019-12-07 12:05:00,654 INFO L109 eAbstractionObserver]: Analyzing ICFG sum_20x0-2.c [2019-12-07 12:05:00,660 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-12-07 12:05:00,664 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-12-07 12:05:00,671 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-12-07 12:05:00,685 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-12-07 12:05:00,685 INFO L374 AbstractCegarLoop]: Hoare is true [2019-12-07 12:05:00,685 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-12-07 12:05:00,685 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-12-07 12:05:00,685 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-12-07 12:05:00,685 INFO L378 AbstractCegarLoop]: Difference is false [2019-12-07 12:05:00,685 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-12-07 12:05:00,686 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-12-07 12:05:00,696 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states. [2019-12-07 12:05:00,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-12-07 12:05:00,699 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 12:05:00,700 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 12:05:00,700 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 12:05:00,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 12:05:00,703 INFO L82 PathProgramCache]: Analyzing trace with hash 389977641, now seen corresponding path program 1 times [2019-12-07 12:05:00,709 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 12:05:00,709 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967689051] [2019-12-07 12:05:00,709 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 12:05:00,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:05:00,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:05:00,838 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 12:05:00,839 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967689051] [2019-12-07 12:05:00,839 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 12:05:00,839 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-12-07 12:05:00,840 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448017085] [2019-12-07 12:05:00,843 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-12-07 12:05:00,843 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 12:05:00,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-12-07 12:05:00,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-12-07 12:05:00,853 INFO L87 Difference]: Start difference. First operand 15 states. Second operand 5 states. [2019-12-07 12:05:00,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 12:05:00,906 INFO L93 Difference]: Finished difference Result 24 states and 27 transitions. [2019-12-07 12:05:00,906 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-12-07 12:05:00,907 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2019-12-07 12:05:00,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 12:05:00,913 INFO L225 Difference]: With dead ends: 24 [2019-12-07 12:05:00,913 INFO L226 Difference]: Without dead ends: 14 [2019-12-07 12:05:00,915 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 [2019-12-07 12:05:00,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2019-12-07 12:05:00,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2019-12-07 12:05:00,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2019-12-07 12:05:00,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2019-12-07 12:05:00,941 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 9 [2019-12-07 12:05:00,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 12:05:00,942 INFO L462 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2019-12-07 12:05:00,942 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-12-07 12:05:00,942 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2019-12-07 12:05:00,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-12-07 12:05:00,943 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 12:05:00,943 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 12:05:00,944 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 12:05:00,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 12:05:00,944 INFO L82 PathProgramCache]: Analyzing trace with hash -881029229, now seen corresponding path program 1 times [2019-12-07 12:05:00,944 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 12:05:00,944 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086955414] [2019-12-07 12:05:00,945 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 12:05:00,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:05:00,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:05:01,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:05:01,015 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-12-07 12:05:01,015 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086955414] [2019-12-07 12:05:01,016 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [680122445] [2019-12-07 12:05:01,016 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_64af9160-e4a3-4fa9-ba66-a5536c4ce182/bin/uautomizer/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 12:05:01,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:05:01,048 INFO L264 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 6 conjunts are in the unsatisfiable core [2019-12-07 12:05:01,052 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 12:05:01,085 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-12-07 12:05:01,085 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 12:05:01,085 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2019-12-07 12:05:01,086 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500337983] [2019-12-07 12:05:01,086 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-12-07 12:05:01,086 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 12:05:01,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-12-07 12:05:01,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-12-07 12:05:01,087 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 7 states. [2019-12-07 12:05:01,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 12:05:01,123 INFO L93 Difference]: Finished difference Result 21 states and 22 transitions. [2019-12-07 12:05:01,123 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-12-07 12:05:01,124 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 15 [2019-12-07 12:05:01,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 12:05:01,124 INFO L225 Difference]: With dead ends: 21 [2019-12-07 12:05:01,124 INFO L226 Difference]: Without dead ends: 17 [2019-12-07 12:05:01,125 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 [2019-12-07 12:05:01,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2019-12-07 12:05:01,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2019-12-07 12:05:01,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-12-07 12:05:01,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2019-12-07 12:05:01,130 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 15 [2019-12-07 12:05:01,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 12:05:01,130 INFO L462 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2019-12-07 12:05:01,130 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-12-07 12:05:01,131 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2019-12-07 12:05:01,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-12-07 12:05:01,132 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 12:05:01,132 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 12:05:01,332 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 12:05:01,333 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 12:05:01,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 12:05:01,334 INFO L82 PathProgramCache]: Analyzing trace with hash -1824240471, now seen corresponding path program 2 times [2019-12-07 12:05:01,334 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 12:05:01,335 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764868816] [2019-12-07 12:05:01,335 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 12:05:01,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:05:01,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:05:01,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:05:01,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:05:01,440 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-12-07 12:05:01,440 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764868816] [2019-12-07 12:05:01,440 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1835205821] [2019-12-07 12:05:01,440 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_64af9160-e4a3-4fa9-ba66-a5536c4ce182/bin/uautomizer/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 12:05:01,461 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-07 12:05:01,461 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 12:05:01,462 INFO L264 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-07 12:05:01,463 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 12:05:01,476 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-12-07 12:05:01,477 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 12:05:01,477 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2019-12-07 12:05:01,477 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588479504] [2019-12-07 12:05:01,477 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-07 12:05:01,477 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 12:05:01,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-07 12:05:01,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-12-07 12:05:01,478 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 8 states. [2019-12-07 12:05:01,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 12:05:01,514 INFO L93 Difference]: Finished difference Result 24 states and 25 transitions. [2019-12-07 12:05:01,514 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-12-07 12:05:01,514 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 21 [2019-12-07 12:05:01,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 12:05:01,515 INFO L225 Difference]: With dead ends: 24 [2019-12-07 12:05:01,515 INFO L226 Difference]: Without dead ends: 20 [2019-12-07 12:05:01,515 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 [2019-12-07 12:05:01,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-12-07 12:05:01,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2019-12-07 12:05:01,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-12-07 12:05:01,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2019-12-07 12:05:01,519 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 21 [2019-12-07 12:05:01,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 12:05:01,519 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2019-12-07 12:05:01,519 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-07 12:05:01,519 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2019-12-07 12:05:01,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-12-07 12:05:01,520 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 12:05:01,520 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 12:05:01,721 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 12:05:01,721 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 12:05:01,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 12:05:01,722 INFO L82 PathProgramCache]: Analyzing trace with hash -28473709, now seen corresponding path program 3 times [2019-12-07 12:05:01,722 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 12:05:01,723 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611079520] [2019-12-07 12:05:01,723 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 12:05:01,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:05:01,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:05:01,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:05:01,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:05:01,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:05:01,840 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-12-07 12:05:01,841 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611079520] [2019-12-07 12:05:01,841 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1810084154] [2019-12-07 12:05:01,841 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_64af9160-e4a3-4fa9-ba66-a5536c4ce182/bin/uautomizer/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 12:05:01,863 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-12-07 12:05:01,863 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 12:05:01,864 INFO L264 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-07 12:05:01,865 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 12:05:01,878 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-12-07 12:05:01,878 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 12:05:01,878 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2019-12-07 12:05:01,879 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190542883] [2019-12-07 12:05:01,879 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-07 12:05:01,879 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 12:05:01,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-07 12:05:01,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-12-07 12:05:01,879 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 9 states. [2019-12-07 12:05:01,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 12:05:01,927 INFO L93 Difference]: Finished difference Result 27 states and 28 transitions. [2019-12-07 12:05:01,927 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-07 12:05:01,927 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 27 [2019-12-07 12:05:01,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 12:05:01,928 INFO L225 Difference]: With dead ends: 27 [2019-12-07 12:05:01,928 INFO L226 Difference]: Without dead ends: 23 [2019-12-07 12:05:01,929 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2019-12-07 12:05:01,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2019-12-07 12:05:01,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2019-12-07 12:05:01,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-12-07 12:05:01,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2019-12-07 12:05:01,932 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 27 [2019-12-07 12:05:01,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 12:05:01,932 INFO L462 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2019-12-07 12:05:01,933 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-07 12:05:01,933 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2019-12-07 12:05:01,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2019-12-07 12:05:01,933 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 12:05:01,933 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 12:05:02,134 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 12:05:02,134 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 12:05:02,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 12:05:02,135 INFO L82 PathProgramCache]: Analyzing trace with hash -2080894167, now seen corresponding path program 4 times [2019-12-07 12:05:02,135 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 12:05:02,135 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951227323] [2019-12-07 12:05:02,135 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 12:05:02,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:05:02,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:05:02,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:05:02,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:05:02,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:05:02,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:05:02,220 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2019-12-07 12:05:02,220 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951227323] [2019-12-07 12:05:02,220 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1097153755] [2019-12-07 12:05:02,220 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_64af9160-e4a3-4fa9-ba66-a5536c4ce182/bin/uautomizer/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 12:05:02,247 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-07 12:05:02,247 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 12:05:02,248 INFO L264 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-07 12:05:02,250 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 12:05:02,269 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2019-12-07 12:05:02,269 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 12:05:02,269 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2019-12-07 12:05:02,270 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132586801] [2019-12-07 12:05:02,270 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-07 12:05:02,270 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 12:05:02,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-07 12:05:02,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2019-12-07 12:05:02,271 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand 10 states. [2019-12-07 12:05:02,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 12:05:02,326 INFO L93 Difference]: Finished difference Result 30 states and 31 transitions. [2019-12-07 12:05:02,326 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-07 12:05:02,326 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 33 [2019-12-07 12:05:02,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 12:05:02,327 INFO L225 Difference]: With dead ends: 30 [2019-12-07 12:05:02,327 INFO L226 Difference]: Without dead ends: 26 [2019-12-07 12:05:02,327 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2019-12-07 12:05:02,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-12-07 12:05:02,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2019-12-07 12:05:02,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-12-07 12:05:02,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2019-12-07 12:05:02,332 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 33 [2019-12-07 12:05:02,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 12:05:02,332 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2019-12-07 12:05:02,332 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-07 12:05:02,332 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2019-12-07 12:05:02,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-12-07 12:05:02,333 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 12:05:02,333 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 12:05:02,533 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 12:05:02,535 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 12:05:02,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 12:05:02,536 INFO L82 PathProgramCache]: Analyzing trace with hash -687460973, now seen corresponding path program 5 times [2019-12-07 12:05:02,536 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 12:05:02,536 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218884574] [2019-12-07 12:05:02,537 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 12:05:02,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:05:02,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:05:02,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:05:02,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:05:02,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:05:02,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:05:02,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:05:02,681 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2019-12-07 12:05:02,681 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218884574] [2019-12-07 12:05:02,681 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [775467368] [2019-12-07 12:05:02,681 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_64af9160-e4a3-4fa9-ba66-a5536c4ce182/bin/uautomizer/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 12:05:02,708 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2019-12-07 12:05:02,708 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 12:05:02,709 INFO L264 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 14 conjunts are in the unsatisfiable core [2019-12-07 12:05:02,711 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 12:05:02,729 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2019-12-07 12:05:02,730 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 12:05:02,730 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2019-12-07 12:05:02,730 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457514658] [2019-12-07 12:05:02,730 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-12-07 12:05:02,731 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 12:05:02,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-12-07 12:05:02,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2019-12-07 12:05:02,731 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand 11 states. [2019-12-07 12:05:02,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 12:05:02,796 INFO L93 Difference]: Finished difference Result 33 states and 34 transitions. [2019-12-07 12:05:02,796 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-07 12:05:02,796 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 39 [2019-12-07 12:05:02,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 12:05:02,797 INFO L225 Difference]: With dead ends: 33 [2019-12-07 12:05:02,797 INFO L226 Difference]: Without dead ends: 29 [2019-12-07 12:05:02,798 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=95, Invalid=177, Unknown=0, NotChecked=0, Total=272 [2019-12-07 12:05:02,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-12-07 12:05:02,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2019-12-07 12:05:02,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-12-07 12:05:02,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2019-12-07 12:05:02,802 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 39 [2019-12-07 12:05:02,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 12:05:02,802 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2019-12-07 12:05:02,802 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-12-07 12:05:02,802 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2019-12-07 12:05:02,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2019-12-07 12:05:02,803 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 12:05:02,803 INFO L410 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 12:05:03,004 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 12:05:03,005 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 12:05:03,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 12:05:03,006 INFO L82 PathProgramCache]: Analyzing trace with hash 547744169, now seen corresponding path program 6 times [2019-12-07 12:05:03,006 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 12:05:03,007 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493479251] [2019-12-07 12:05:03,007 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 12:05:03,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:05:03,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:05:03,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:05:03,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:05:03,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:05:03,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:05:03,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:05:03,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:05:03,249 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2019-12-07 12:05:03,249 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493479251] [2019-12-07 12:05:03,249 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1700727020] [2019-12-07 12:05:03,249 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_64af9160-e4a3-4fa9-ba66-a5536c4ce182/bin/uautomizer/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 12:05:03,282 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-12-07 12:05:03,282 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 12:05:03,283 INFO L264 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 16 conjunts are in the unsatisfiable core [2019-12-07 12:05:03,285 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 12:05:03,303 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2019-12-07 12:05:03,303 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 12:05:03,303 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2019-12-07 12:05:03,304 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767043438] [2019-12-07 12:05:03,304 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-07 12:05:03,304 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 12:05:03,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-07 12:05:03,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2019-12-07 12:05:03,305 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand 12 states. [2019-12-07 12:05:03,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 12:05:03,375 INFO L93 Difference]: Finished difference Result 36 states and 37 transitions. [2019-12-07 12:05:03,376 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-12-07 12:05:03,376 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 45 [2019-12-07 12:05:03,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 12:05:03,376 INFO L225 Difference]: With dead ends: 36 [2019-12-07 12:05:03,376 INFO L226 Difference]: Without dead ends: 32 [2019-12-07 12:05:03,377 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 [2019-12-07 12:05:03,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-12-07 12:05:03,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2019-12-07 12:05:03,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-12-07 12:05:03,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2019-12-07 12:05:03,380 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 45 [2019-12-07 12:05:03,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 12:05:03,381 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2019-12-07 12:05:03,381 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-07 12:05:03,381 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2019-12-07 12:05:03,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2019-12-07 12:05:03,382 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 12:05:03,382 INFO L410 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 12:05:03,582 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 12:05:03,582 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 12:05:03,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 12:05:03,583 INFO L82 PathProgramCache]: Analyzing trace with hash -247823213, now seen corresponding path program 7 times [2019-12-07 12:05:03,583 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 12:05:03,583 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325199602] [2019-12-07 12:05:03,583 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 12:05:03,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:05:03,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:05:03,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:05:03,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:05:03,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:05:03,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:05:03,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:05:03,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:05:03,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:05:03,710 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2019-12-07 12:05:03,710 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325199602] [2019-12-07 12:05:03,710 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [437762553] [2019-12-07 12:05:03,710 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_64af9160-e4a3-4fa9-ba66-a5536c4ce182/bin/uautomizer/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 12:05:03,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:05:03,741 INFO L264 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 18 conjunts are in the unsatisfiable core [2019-12-07 12:05:03,743 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 12:05:03,762 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2019-12-07 12:05:03,763 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 12:05:03,763 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2019-12-07 12:05:03,763 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596664449] [2019-12-07 12:05:03,763 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-12-07 12:05:03,764 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 12:05:03,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-12-07 12:05:03,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2019-12-07 12:05:03,764 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand 13 states. [2019-12-07 12:05:03,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 12:05:03,835 INFO L93 Difference]: Finished difference Result 39 states and 40 transitions. [2019-12-07 12:05:03,835 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-12-07 12:05:03,835 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 51 [2019-12-07 12:05:03,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 12:05:03,836 INFO L225 Difference]: With dead ends: 39 [2019-12-07 12:05:03,836 INFO L226 Difference]: Without dead ends: 35 [2019-12-07 12:05:03,837 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=148, Invalid=272, Unknown=0, NotChecked=0, Total=420 [2019-12-07 12:05:03,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-12-07 12:05:03,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2019-12-07 12:05:03,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-12-07 12:05:03,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2019-12-07 12:05:03,840 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 51 [2019-12-07 12:05:03,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 12:05:03,840 INFO L462 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2019-12-07 12:05:03,841 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-12-07 12:05:03,841 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2019-12-07 12:05:03,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2019-12-07 12:05:03,841 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 12:05:03,841 INFO L410 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 12:05:04,042 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 12:05:04,043 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 12:05:04,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 12:05:04,043 INFO L82 PathProgramCache]: Analyzing trace with hash -1818636247, now seen corresponding path program 8 times [2019-12-07 12:05:04,044 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 12:05:04,044 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451942206] [2019-12-07 12:05:04,045 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 12:05:04,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:05:04,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:05:04,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:05:04,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:05:04,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:05:04,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:05:04,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:05:04,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:05:04,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:05:04,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:05:04,298 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2019-12-07 12:05:04,298 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451942206] [2019-12-07 12:05:04,298 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2099514677] [2019-12-07 12:05:04,298 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_64af9160-e4a3-4fa9-ba66-a5536c4ce182/bin/uautomizer/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 12:05:04,326 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-07 12:05:04,326 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 12:05:04,327 INFO L264 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 20 conjunts are in the unsatisfiable core [2019-12-07 12:05:04,329 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 12:05:04,352 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2019-12-07 12:05:04,353 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 12:05:04,353 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2019-12-07 12:05:04,353 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109827478] [2019-12-07 12:05:04,353 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-07 12:05:04,354 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 12:05:04,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-07 12:05:04,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2019-12-07 12:05:04,354 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand 14 states. [2019-12-07 12:05:04,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 12:05:04,440 INFO L93 Difference]: Finished difference Result 42 states and 43 transitions. [2019-12-07 12:05:04,440 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-12-07 12:05:04,440 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 57 [2019-12-07 12:05:04,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 12:05:04,441 INFO L225 Difference]: With dead ends: 42 [2019-12-07 12:05:04,441 INFO L226 Difference]: Without dead ends: 38 [2019-12-07 12:05:04,442 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=179, Invalid=327, Unknown=0, NotChecked=0, Total=506 [2019-12-07 12:05:04,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2019-12-07 12:05:04,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2019-12-07 12:05:04,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-12-07 12:05:04,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2019-12-07 12:05:04,445 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 57 [2019-12-07 12:05:04,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 12:05:04,446 INFO L462 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2019-12-07 12:05:04,446 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-07 12:05:04,446 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2019-12-07 12:05:04,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2019-12-07 12:05:04,447 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 12:05:04,447 INFO L410 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 12:05:04,647 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 12:05:04,648 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 12:05:04,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 12:05:04,649 INFO L82 PathProgramCache]: Analyzing trace with hash -2055304301, now seen corresponding path program 9 times [2019-12-07 12:05:04,649 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 12:05:04,650 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503015514] [2019-12-07 12:05:04,650 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 12:05:04,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:05:04,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:05:04,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:05:04,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:05:04,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:05:04,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:05:04,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:05:04,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:05:04,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:05:04,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:05:04,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:05:04,922 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2019-12-07 12:05:04,923 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503015514] [2019-12-07 12:05:04,923 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1676391617] [2019-12-07 12:05:04,923 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_64af9160-e4a3-4fa9-ba66-a5536c4ce182/bin/uautomizer/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 12:05:04,958 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2019-12-07 12:05:04,958 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 12:05:04,959 INFO L264 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 22 conjunts are in the unsatisfiable core [2019-12-07 12:05:04,962 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 12:05:04,989 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2019-12-07 12:05:04,989 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 12:05:04,990 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2019-12-07 12:05:04,990 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639858028] [2019-12-07 12:05:04,990 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-12-07 12:05:04,991 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 12:05:04,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-12-07 12:05:04,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2019-12-07 12:05:04,991 INFO L87 Difference]: Start difference. First operand 38 states and 39 transitions. Second operand 15 states. [2019-12-07 12:05:05,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 12:05:05,083 INFO L93 Difference]: Finished difference Result 45 states and 46 transitions. [2019-12-07 12:05:05,083 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-12-07 12:05:05,083 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 63 [2019-12-07 12:05:05,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 12:05:05,084 INFO L225 Difference]: With dead ends: 45 [2019-12-07 12:05:05,084 INFO L226 Difference]: Without dead ends: 41 [2019-12-07 12:05:05,085 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=213, Invalid=387, Unknown=0, NotChecked=0, Total=600 [2019-12-07 12:05:05,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2019-12-07 12:05:05,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2019-12-07 12:05:05,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-12-07 12:05:05,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2019-12-07 12:05:05,090 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 63 [2019-12-07 12:05:05,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 12:05:05,090 INFO L462 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2019-12-07 12:05:05,090 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-12-07 12:05:05,090 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2019-12-07 12:05:05,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2019-12-07 12:05:05,091 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 12:05:05,091 INFO L410 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 12:05:05,292 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 12:05:05,292 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 12:05:05,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 12:05:05,292 INFO L82 PathProgramCache]: Analyzing trace with hash -1172322647, now seen corresponding path program 10 times [2019-12-07 12:05:05,292 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 12:05:05,293 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714844509] [2019-12-07 12:05:05,293 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 12:05:05,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:05:05,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:05:05,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:05:05,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:05:05,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:05:05,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:05:05,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:05:05,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:05:05,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:05:05,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:05:05,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:05:05,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:05:05,480 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2019-12-07 12:05:05,480 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714844509] [2019-12-07 12:05:05,480 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2113035428] [2019-12-07 12:05:05,480 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_64af9160-e4a3-4fa9-ba66-a5536c4ce182/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 [2019-12-07 12:05:05,518 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-07 12:05:05,518 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 12:05:05,519 INFO L264 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 24 conjunts are in the unsatisfiable core [2019-12-07 12:05:05,521 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 12:05:05,548 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2019-12-07 12:05:05,548 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 12:05:05,548 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2019-12-07 12:05:05,549 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175696886] [2019-12-07 12:05:05,549 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-07 12:05:05,549 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 12:05:05,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-07 12:05:05,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2019-12-07 12:05:05,549 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand 16 states. [2019-12-07 12:05:05,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 12:05:05,639 INFO L93 Difference]: Finished difference Result 48 states and 49 transitions. [2019-12-07 12:05:05,639 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-12-07 12:05:05,639 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 69 [2019-12-07 12:05:05,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 12:05:05,640 INFO L225 Difference]: With dead ends: 48 [2019-12-07 12:05:05,640 INFO L226 Difference]: Without dead ends: 44 [2019-12-07 12:05:05,641 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=250, Invalid=452, Unknown=0, NotChecked=0, Total=702 [2019-12-07 12:05:05,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2019-12-07 12:05:05,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2019-12-07 12:05:05,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-12-07 12:05:05,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 45 transitions. [2019-12-07 12:05:05,645 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 45 transitions. Word has length 69 [2019-12-07 12:05:05,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 12:05:05,645 INFO L462 AbstractCegarLoop]: Abstraction has 44 states and 45 transitions. [2019-12-07 12:05:05,645 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-07 12:05:05,645 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 45 transitions. [2019-12-07 12:05:05,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2019-12-07 12:05:05,646 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 12:05:05,646 INFO L410 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 12:05:05,847 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 12:05:05,848 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 12:05:05,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 12:05:05,848 INFO L82 PathProgramCache]: Analyzing trace with hash -1452916077, now seen corresponding path program 11 times [2019-12-07 12:05:05,849 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 12:05:05,849 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614864284] [2019-12-07 12:05:05,849 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 12:05:05,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:05:05,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:05:05,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:05:06,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:05:06,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:05:06,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:05:06,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:05:06,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:05:06,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:05:06,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:05:06,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:05:06,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:05:06,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:05:06,174 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2019-12-07 12:05:06,174 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614864284] [2019-12-07 12:05:06,174 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1711882030] [2019-12-07 12:05:06,174 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_64af9160-e4a3-4fa9-ba66-a5536c4ce182/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 [2019-12-07 12:05:06,208 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2019-12-07 12:05:06,208 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 12:05:06,209 INFO L264 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 26 conjunts are in the unsatisfiable core [2019-12-07 12:05:06,211 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 12:05:06,237 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2019-12-07 12:05:06,237 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 12:05:06,237 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2019-12-07 12:05:06,237 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079393780] [2019-12-07 12:05:06,237 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-12-07 12:05:06,238 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 12:05:06,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-12-07 12:05:06,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=174, Unknown=0, NotChecked=0, Total=272 [2019-12-07 12:05:06,238 INFO L87 Difference]: Start difference. First operand 44 states and 45 transitions. Second operand 17 states. [2019-12-07 12:05:06,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 12:05:06,329 INFO L93 Difference]: Finished difference Result 51 states and 52 transitions. [2019-12-07 12:05:06,330 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-12-07 12:05:06,330 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 75 [2019-12-07 12:05:06,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 12:05:06,330 INFO L225 Difference]: With dead ends: 51 [2019-12-07 12:05:06,330 INFO L226 Difference]: Without dead ends: 47 [2019-12-07 12:05:06,331 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=290, Invalid=522, Unknown=0, NotChecked=0, Total=812 [2019-12-07 12:05:06,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2019-12-07 12:05:06,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2019-12-07 12:05:06,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2019-12-07 12:05:06,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 48 transitions. [2019-12-07 12:05:06,335 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 48 transitions. Word has length 75 [2019-12-07 12:05:06,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 12:05:06,335 INFO L462 AbstractCegarLoop]: Abstraction has 47 states and 48 transitions. [2019-12-07 12:05:06,335 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-12-07 12:05:06,335 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 48 transitions. [2019-12-07 12:05:06,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2019-12-07 12:05:06,336 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 12:05:06,336 INFO L410 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 12:05:06,536 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 12:05:06,537 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 12:05:06,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 12:05:06,538 INFO L82 PathProgramCache]: Analyzing trace with hash -461124311, now seen corresponding path program 12 times [2019-12-07 12:05:06,538 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 12:05:06,538 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247549571] [2019-12-07 12:05:06,539 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 12:05:06,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:05:06,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:05:06,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:05:06,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:05:06,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:05:06,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:05:06,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:05:06,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:05:06,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:05:06,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:05:06,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:05:06,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:05:06,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:05:06,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:05:06,872 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2019-12-07 12:05:06,873 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247549571] [2019-12-07 12:05:06,873 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2055646267] [2019-12-07 12:05:06,873 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_64af9160-e4a3-4fa9-ba66-a5536c4ce182/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 [2019-12-07 12:05:06,916 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2019-12-07 12:05:06,916 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 12:05:06,917 INFO L264 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 28 conjunts are in the unsatisfiable core [2019-12-07 12:05:06,918 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 12:05:06,941 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2019-12-07 12:05:06,941 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 12:05:06,942 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2019-12-07 12:05:06,942 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196895703] [2019-12-07 12:05:06,942 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-07 12:05:06,942 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 12:05:06,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-07 12:05:06,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=194, Unknown=0, NotChecked=0, Total=306 [2019-12-07 12:05:06,943 INFO L87 Difference]: Start difference. First operand 47 states and 48 transitions. Second operand 18 states. [2019-12-07 12:05:07,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 12:05:07,047 INFO L93 Difference]: Finished difference Result 54 states and 55 transitions. [2019-12-07 12:05:07,047 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-12-07 12:05:07,047 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 81 [2019-12-07 12:05:07,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 12:05:07,048 INFO L225 Difference]: With dead ends: 54 [2019-12-07 12:05:07,048 INFO L226 Difference]: Without dead ends: 50 [2019-12-07 12:05:07,049 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 [2019-12-07 12:05:07,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2019-12-07 12:05:07,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2019-12-07 12:05:07,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2019-12-07 12:05:07,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 51 transitions. [2019-12-07 12:05:07,053 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 51 transitions. Word has length 81 [2019-12-07 12:05:07,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 12:05:07,054 INFO L462 AbstractCegarLoop]: Abstraction has 50 states and 51 transitions. [2019-12-07 12:05:07,054 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-07 12:05:07,054 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 51 transitions. [2019-12-07 12:05:07,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2019-12-07 12:05:07,054 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 12:05:07,055 INFO L410 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 12:05:07,255 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 12:05:07,256 INFO L410 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 12:05:07,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 12:05:07,257 INFO L82 PathProgramCache]: Analyzing trace with hash -1887065709, now seen corresponding path program 13 times [2019-12-07 12:05:07,257 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 12:05:07,257 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159475698] [2019-12-07 12:05:07,258 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 12:05:07,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:05:07,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:05:07,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:05:07,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:05:07,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:05:07,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:05:07,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:05:07,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:05:07,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:05:07,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:05:07,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:05:07,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:05:07,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:05:07,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:05:07,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:05:07,585 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2019-12-07 12:05:07,586 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159475698] [2019-12-07 12:05:07,586 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1749833073] [2019-12-07 12:05:07,586 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_64af9160-e4a3-4fa9-ba66-a5536c4ce182/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 [2019-12-07 12:05:07,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:05:07,619 INFO L264 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 30 conjunts are in the unsatisfiable core [2019-12-07 12:05:07,620 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 12:05:07,643 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2019-12-07 12:05:07,643 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 12:05:07,643 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2019-12-07 12:05:07,643 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453399722] [2019-12-07 12:05:07,644 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-12-07 12:05:07,644 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 12:05:07,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-12-07 12:05:07,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=215, Unknown=0, NotChecked=0, Total=342 [2019-12-07 12:05:07,644 INFO L87 Difference]: Start difference. First operand 50 states and 51 transitions. Second operand 19 states. [2019-12-07 12:05:07,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 12:05:07,755 INFO L93 Difference]: Finished difference Result 57 states and 58 transitions. [2019-12-07 12:05:07,756 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-07 12:05:07,756 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 87 [2019-12-07 12:05:07,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 12:05:07,757 INFO L225 Difference]: With dead ends: 57 [2019-12-07 12:05:07,757 INFO L226 Difference]: Without dead ends: 53 [2019-12-07 12:05:07,757 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=379, Invalid=677, Unknown=0, NotChecked=0, Total=1056 [2019-12-07 12:05:07,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2019-12-07 12:05:07,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2019-12-07 12:05:07,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2019-12-07 12:05:07,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2019-12-07 12:05:07,762 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 87 [2019-12-07 12:05:07,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 12:05:07,762 INFO L462 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2019-12-07 12:05:07,762 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-12-07 12:05:07,762 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2019-12-07 12:05:07,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2019-12-07 12:05:07,763 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 12:05:07,764 INFO L410 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 12:05:07,964 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 12:05:07,965 INFO L410 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 12:05:07,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 12:05:07,965 INFO L82 PathProgramCache]: Analyzing trace with hash -1777212503, now seen corresponding path program 14 times [2019-12-07 12:05:07,966 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 12:05:07,966 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552103502] [2019-12-07 12:05:07,966 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 12:05:07,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:05:08,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:05:08,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:05:08,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:05:08,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:05:08,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:05:08,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:05:08,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:05:08,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:05:08,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:05:08,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:05:08,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:05:08,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:05:08,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:05:08,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:05:08,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:05:08,267 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2019-12-07 12:05:08,268 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552103502] [2019-12-07 12:05:08,268 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1249318395] [2019-12-07 12:05:08,268 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_64af9160-e4a3-4fa9-ba66-a5536c4ce182/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 [2019-12-07 12:05:08,301 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-07 12:05:08,301 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 12:05:08,302 INFO L264 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 32 conjunts are in the unsatisfiable core [2019-12-07 12:05:08,304 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 12:05:08,335 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2019-12-07 12:05:08,336 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 12:05:08,336 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2019-12-07 12:05:08,336 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134036716] [2019-12-07 12:05:08,336 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-12-07 12:05:08,336 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 12:05:08,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-12-07 12:05:08,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=237, Unknown=0, NotChecked=0, Total=380 [2019-12-07 12:05:08,337 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand 20 states. [2019-12-07 12:05:08,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 12:05:08,468 INFO L93 Difference]: Finished difference Result 60 states and 61 transitions. [2019-12-07 12:05:08,468 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-12-07 12:05:08,468 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 93 [2019-12-07 12:05:08,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 12:05:08,469 INFO L225 Difference]: With dead ends: 60 [2019-12-07 12:05:08,469 INFO L226 Difference]: Without dead ends: 56 [2019-12-07 12:05:08,470 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=428, Invalid=762, Unknown=0, NotChecked=0, Total=1190 [2019-12-07 12:05:08,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2019-12-07 12:05:08,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2019-12-07 12:05:08,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2019-12-07 12:05:08,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 57 transitions. [2019-12-07 12:05:08,473 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 57 transitions. Word has length 93 [2019-12-07 12:05:08,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 12:05:08,473 INFO L462 AbstractCegarLoop]: Abstraction has 56 states and 57 transitions. [2019-12-07 12:05:08,473 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-12-07 12:05:08,473 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 57 transitions. [2019-12-07 12:05:08,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2019-12-07 12:05:08,474 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 12:05:08,474 INFO L410 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 12:05:08,674 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 12:05:08,675 INFO L410 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 12:05:08,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 12:05:08,676 INFO L82 PathProgramCache]: Analyzing trace with hash -948911981, now seen corresponding path program 15 times [2019-12-07 12:05:08,676 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 12:05:08,676 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982677973] [2019-12-07 12:05:08,677 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 12:05:08,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:05:08,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:05:08,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:05:08,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:05:08,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:05:08,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:05:08,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:05:08,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:05:08,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:05:08,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:05:08,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:05:08,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:05:08,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:05:08,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:05:08,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:05:08,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:05:08,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:05:08,993 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2019-12-07 12:05:08,994 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982677973] [2019-12-07 12:05:08,994 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1458957994] [2019-12-07 12:05:08,994 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_64af9160-e4a3-4fa9-ba66-a5536c4ce182/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 [2019-12-07 12:05:09,034 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2019-12-07 12:05:09,034 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 12:05:09,035 INFO L264 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 34 conjunts are in the unsatisfiable core [2019-12-07 12:05:09,036 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 12:05:09,062 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2019-12-07 12:05:09,063 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 12:05:09,063 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2019-12-07 12:05:09,063 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565988699] [2019-12-07 12:05:09,063 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-12-07 12:05:09,063 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 12:05:09,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-12-07 12:05:09,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=260, Unknown=0, NotChecked=0, Total=420 [2019-12-07 12:05:09,064 INFO L87 Difference]: Start difference. First operand 56 states and 57 transitions. Second operand 21 states. [2019-12-07 12:05:09,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 12:05:09,182 INFO L93 Difference]: Finished difference Result 63 states and 64 transitions. [2019-12-07 12:05:09,182 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-12-07 12:05:09,182 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 99 [2019-12-07 12:05:09,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 12:05:09,183 INFO L225 Difference]: With dead ends: 63 [2019-12-07 12:05:09,183 INFO L226 Difference]: Without dead ends: 59 [2019-12-07 12:05:09,184 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=480, Invalid=852, Unknown=0, NotChecked=0, Total=1332 [2019-12-07 12:05:09,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2019-12-07 12:05:09,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2019-12-07 12:05:09,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2019-12-07 12:05:09,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 60 transitions. [2019-12-07 12:05:09,187 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 60 transitions. Word has length 99 [2019-12-07 12:05:09,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 12:05:09,187 INFO L462 AbstractCegarLoop]: Abstraction has 59 states and 60 transitions. [2019-12-07 12:05:09,187 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-12-07 12:05:09,187 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 60 transitions. [2019-12-07 12:05:09,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2019-12-07 12:05:09,188 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 12:05:09,188 INFO L410 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 12:05:09,388 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 12:05:09,389 INFO L410 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 12:05:09,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 12:05:09,390 INFO L82 PathProgramCache]: Analyzing trace with hash 1159072297, now seen corresponding path program 16 times [2019-12-07 12:05:09,390 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 12:05:09,390 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727876567] [2019-12-07 12:05:09,391 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 12:05:09,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:05:09,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:05:09,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:05:09,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:05:09,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:05:09,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:05:09,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:05:09,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:05:09,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:05:09,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:05:09,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:05:09,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:05:09,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:05:09,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:05:09,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:05:09,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:05:09,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:05:09,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:05:09,779 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2019-12-07 12:05:09,780 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727876567] [2019-12-07 12:05:09,780 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1693918800] [2019-12-07 12:05:09,780 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_64af9160-e4a3-4fa9-ba66-a5536c4ce182/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 [2019-12-07 12:05:09,817 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-07 12:05:09,817 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 12:05:09,818 INFO L264 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 36 conjunts are in the unsatisfiable core [2019-12-07 12:05:09,820 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 12:05:09,845 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2019-12-07 12:05:09,846 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 12:05:09,846 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2019-12-07 12:05:09,846 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483885147] [2019-12-07 12:05:09,846 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-12-07 12:05:09,846 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 12:05:09,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-12-07 12:05:09,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=284, Unknown=0, NotChecked=0, Total=462 [2019-12-07 12:05:09,847 INFO L87 Difference]: Start difference. First operand 59 states and 60 transitions. Second operand 22 states. [2019-12-07 12:05:09,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 12:05:09,989 INFO L93 Difference]: Finished difference Result 66 states and 67 transitions. [2019-12-07 12:05:09,989 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-12-07 12:05:09,989 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 105 [2019-12-07 12:05:09,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 12:05:09,990 INFO L225 Difference]: With dead ends: 66 [2019-12-07 12:05:09,990 INFO L226 Difference]: Without dead ends: 62 [2019-12-07 12:05:09,991 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=535, Invalid=947, Unknown=0, NotChecked=0, Total=1482 [2019-12-07 12:05:09,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2019-12-07 12:05:09,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2019-12-07 12:05:09,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2019-12-07 12:05:09,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 63 transitions. [2019-12-07 12:05:09,994 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 63 transitions. Word has length 105 [2019-12-07 12:05:09,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 12:05:09,994 INFO L462 AbstractCegarLoop]: Abstraction has 62 states and 63 transitions. [2019-12-07 12:05:09,994 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-12-07 12:05:09,994 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 63 transitions. [2019-12-07 12:05:09,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2019-12-07 12:05:09,995 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 12:05:09,995 INFO L410 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 12:05:10,195 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 12:05:10,196 INFO L410 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 12:05:10,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 12:05:10,197 INFO L82 PathProgramCache]: Analyzing trace with hash 2109441939, now seen corresponding path program 17 times [2019-12-07 12:05:10,197 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 12:05:10,197 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168560713] [2019-12-07 12:05:10,198 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 12:05:10,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:05:10,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:05:10,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:05:10,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:05:10,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:05:10,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:05:10,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:05:10,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:05:10,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:05:10,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:05:10,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:05:10,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:05:10,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:05:10,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:05:10,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:05:10,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:05:10,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:05:10,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:05:10,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:05:10,601 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2019-12-07 12:05:10,602 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168560713] [2019-12-07 12:05:10,602 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1606763823] [2019-12-07 12:05:10,602 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_64af9160-e4a3-4fa9-ba66-a5536c4ce182/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 [2019-12-07 12:05:10,646 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2019-12-07 12:05:10,646 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 12:05:10,648 INFO L264 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 38 conjunts are in the unsatisfiable core [2019-12-07 12:05:10,649 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 12:05:10,676 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2019-12-07 12:05:10,676 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 12:05:10,676 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2019-12-07 12:05:10,677 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529723642] [2019-12-07 12:05:10,677 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-12-07 12:05:10,677 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 12:05:10,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-12-07 12:05:10,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=309, Unknown=0, NotChecked=0, Total=506 [2019-12-07 12:05:10,678 INFO L87 Difference]: Start difference. First operand 62 states and 63 transitions. Second operand 23 states. [2019-12-07 12:05:10,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 12:05:10,826 INFO L93 Difference]: Finished difference Result 69 states and 70 transitions. [2019-12-07 12:05:10,826 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-12-07 12:05:10,827 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 111 [2019-12-07 12:05:10,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 12:05:10,827 INFO L225 Difference]: With dead ends: 69 [2019-12-07 12:05:10,827 INFO L226 Difference]: Without dead ends: 65 [2019-12-07 12:05:10,828 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=593, Invalid=1047, Unknown=0, NotChecked=0, Total=1640 [2019-12-07 12:05:10,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2019-12-07 12:05:10,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2019-12-07 12:05:10,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2019-12-07 12:05:10,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 66 transitions. [2019-12-07 12:05:10,831 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 66 transitions. Word has length 111 [2019-12-07 12:05:10,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 12:05:10,831 INFO L462 AbstractCegarLoop]: Abstraction has 65 states and 66 transitions. [2019-12-07 12:05:10,831 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-12-07 12:05:10,831 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 66 transitions. [2019-12-07 12:05:10,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2019-12-07 12:05:10,832 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 12:05:10,832 INFO L410 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 12:05:11,032 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 12:05:11,033 INFO L410 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 12:05:11,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 12:05:11,033 INFO L82 PathProgramCache]: Analyzing trace with hash 450642089, now seen corresponding path program 18 times [2019-12-07 12:05:11,034 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 12:05:11,034 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775545766] [2019-12-07 12:05:11,034 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 12:05:11,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:05:11,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:05:11,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:05:11,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:05:11,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:05:11,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:05:11,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:05:11,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:05:11,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:05:11,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:05:11,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:05:11,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:05:11,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:05:11,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:05:11,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:05:11,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:05:11,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:05:11,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:05:11,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:05:11,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:05:11,441 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2019-12-07 12:05:11,442 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775545766] [2019-12-07 12:05:11,442 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [598346109] [2019-12-07 12:05:11,442 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_64af9160-e4a3-4fa9-ba66-a5536c4ce182/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 [2019-12-07 12:05:11,494 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2019-12-07 12:05:11,495 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 12:05:11,496 INFO L264 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 40 conjunts are in the unsatisfiable core [2019-12-07 12:05:11,497 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 12:05:11,526 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2019-12-07 12:05:11,526 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 12:05:11,526 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2019-12-07 12:05:11,526 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152226442] [2019-12-07 12:05:11,527 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-12-07 12:05:11,527 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 12:05:11,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-12-07 12:05:11,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=335, Unknown=0, NotChecked=0, Total=552 [2019-12-07 12:05:11,527 INFO L87 Difference]: Start difference. First operand 65 states and 66 transitions. Second operand 24 states. [2019-12-07 12:05:11,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 12:05:11,677 INFO L93 Difference]: Finished difference Result 72 states and 73 transitions. [2019-12-07 12:05:11,677 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-12-07 12:05:11,677 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 117 [2019-12-07 12:05:11,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 12:05:11,678 INFO L225 Difference]: With dead ends: 72 [2019-12-07 12:05:11,678 INFO L226 Difference]: Without dead ends: 68 [2019-12-07 12:05:11,679 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 342 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=654, Invalid=1152, Unknown=0, NotChecked=0, Total=1806 [2019-12-07 12:05:11,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2019-12-07 12:05:11,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2019-12-07 12:05:11,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2019-12-07 12:05:11,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 69 transitions. [2019-12-07 12:05:11,681 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 69 transitions. Word has length 117 [2019-12-07 12:05:11,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 12:05:11,682 INFO L462 AbstractCegarLoop]: Abstraction has 68 states and 69 transitions. [2019-12-07 12:05:11,682 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-12-07 12:05:11,682 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 69 transitions. [2019-12-07 12:05:11,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2019-12-07 12:05:11,682 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 12:05:11,682 INFO L410 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 12:05:11,883 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 12:05:11,883 INFO L410 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 12:05:11,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 12:05:11,883 INFO L82 PathProgramCache]: Analyzing trace with hash -1141244269, now seen corresponding path program 19 times [2019-12-07 12:05:11,883 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 12:05:11,883 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288551975] [2019-12-07 12:05:11,883 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 12:05:11,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:05:11,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:05:11,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:05:11,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:05:11,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:05:11,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:05:11,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:05:12,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:05:12,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:05:12,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:05:12,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:05:12,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:05:12,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:05:12,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:05:12,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:05:12,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:05:12,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:05:12,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:05:12,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:05:12,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:05:12,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:05:12,310 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2019-12-07 12:05:12,311 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288551975] [2019-12-07 12:05:12,311 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1111452011] [2019-12-07 12:05:12,311 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_64af9160-e4a3-4fa9-ba66-a5536c4ce182/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 [2019-12-07 12:05:12,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:05:12,352 INFO L264 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 42 conjunts are in the unsatisfiable core [2019-12-07 12:05:12,354 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 12:05:12,397 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2019-12-07 12:05:12,398 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 12:05:12,398 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2019-12-07 12:05:12,398 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665447792] [2019-12-07 12:05:12,398 INFO L442 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-12-07 12:05:12,398 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 12:05:12,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-12-07 12:05:12,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=238, Invalid=362, Unknown=0, NotChecked=0, Total=600 [2019-12-07 12:05:12,399 INFO L87 Difference]: Start difference. First operand 68 states and 69 transitions. Second operand 25 states. [2019-12-07 12:05:12,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 12:05:12,598 INFO L93 Difference]: Finished difference Result 75 states and 76 transitions. [2019-12-07 12:05:12,599 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-12-07 12:05:12,599 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 123 [2019-12-07 12:05:12,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 12:05:12,599 INFO L225 Difference]: With dead ends: 75 [2019-12-07 12:05:12,599 INFO L226 Difference]: Without dead ends: 71 [2019-12-07 12:05:12,600 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 380 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=718, Invalid=1262, Unknown=0, NotChecked=0, Total=1980 [2019-12-07 12:05:12,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2019-12-07 12:05:12,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2019-12-07 12:05:12,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2019-12-07 12:05:12,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 72 transitions. [2019-12-07 12:05:12,603 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 72 transitions. Word has length 123 [2019-12-07 12:05:12,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 12:05:12,603 INFO L462 AbstractCegarLoop]: Abstraction has 71 states and 72 transitions. [2019-12-07 12:05:12,603 INFO L463 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-12-07 12:05:12,603 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 72 transitions. [2019-12-07 12:05:12,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2019-12-07 12:05:12,604 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 12:05:12,604 INFO L410 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 12:05:12,804 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 12:05:12,804 INFO L410 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 12:05:12,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 12:05:12,805 INFO L82 PathProgramCache]: Analyzing trace with hash -1280276695, now seen corresponding path program 20 times [2019-12-07 12:05:12,805 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 12:05:12,805 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232577925] [2019-12-07 12:05:12,805 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 12:05:12,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:05:12,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:05:12,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:05:12,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:05:13,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:05:13,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:05:13,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:05:13,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:05:13,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:05:13,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:05:13,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:05:13,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:05:13,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:05:13,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:05:13,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:05:13,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:05:13,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:05:13,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:05:13,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:05:13,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:05:13,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:05:14,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:05:14,284 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 589 proven. 40 refuted. 0 times theorem prover too weak. 591 trivial. 0 not checked. [2019-12-07 12:05:14,284 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232577925] [2019-12-07 12:05:14,284 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [740901273] [2019-12-07 12:05:14,284 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_64af9160-e4a3-4fa9-ba66-a5536c4ce182/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 [2019-12-07 12:05:14,325 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-07 12:05:14,326 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 12:05:14,329 INFO L264 TraceCheckSpWp]: Trace formula consists of 388 conjuncts, 177 conjunts are in the unsatisfiable core [2019-12-07 12:05:14,331 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 12:05:16,327 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 39 proven. 610 refuted. 0 times theorem prover too weak. 571 trivial. 0 not checked. [2019-12-07 12:05:16,327 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 12:05:16,327 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 49] total 94 [2019-12-07 12:05:16,327 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638530723] [2019-12-07 12:05:16,328 INFO L442 AbstractCegarLoop]: Interpolant automaton has 94 states [2019-12-07 12:05:16,328 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 12:05:16,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2019-12-07 12:05:16,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=580, Invalid=8162, Unknown=0, NotChecked=0, Total=8742 [2019-12-07 12:05:16,330 INFO L87 Difference]: Start difference. First operand 71 states and 72 transitions. Second operand 94 states. [2019-12-07 12:05:22,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 12:05:22,525 INFO L93 Difference]: Finished difference Result 74 states and 76 transitions. [2019-12-07 12:05:22,525 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2019-12-07 12:05:22,525 INFO L78 Accepts]: Start accepts. Automaton has 94 states. Word has length 129 [2019-12-07 12:05:22,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 12:05:22,525 INFO L225 Difference]: With dead ends: 74 [2019-12-07 12:05:22,525 INFO L226 Difference]: Without dead ends: 0 [2019-12-07 12:05:22,530 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3521 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=1382, Invalid=17250, Unknown=0, NotChecked=0, Total=18632 [2019-12-07 12:05:22,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-12-07 12:05:22,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-12-07 12:05:22,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-12-07 12:05:22,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-12-07 12:05:22,531 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 129 [2019-12-07 12:05:22,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 12:05:22,531 INFO L462 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-12-07 12:05:22,531 INFO L463 AbstractCegarLoop]: Interpolant automaton has 94 states. [2019-12-07 12:05:22,531 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-12-07 12:05:22,531 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-12-07 12:05:22,731 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 12:05:22,736 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2019-12-07 12:05:22,766 INFO L246 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2019-12-07 12:05:22,766 INFO L246 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2019-12-07 12:05:22,767 INFO L246 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2019-12-07 12:05:22,767 INFO L246 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 16) no Hoare annotation was computed. [2019-12-07 12:05:22,767 INFO L246 CegarLoopResult]: For program point L16(line 16) no Hoare annotation was computed. [2019-12-07 12:05:22,767 INFO L246 CegarLoopResult]: For program point L15(lines 15 17) no Hoare annotation was computed. [2019-12-07 12:05:22,767 INFO L242 CegarLoopResult]: At program point L14(line 14) the Hoare annotation is: (= ULTIMATE.start_main_~a~0 20) [2019-12-07 12:05:22,767 INFO L246 CegarLoopResult]: For program point L14-1(line 14) no Hoare annotation was computed. [2019-12-07 12:05:22,767 INFO L246 CegarLoopResult]: For program point L11(lines 11 18) no Hoare annotation was computed. [2019-12-07 12:05:22,767 INFO L246 CegarLoopResult]: For program point sumEXIT(lines 3 9) no Hoare annotation was computed. [2019-12-07 12:05:22,767 INFO L242 CegarLoopResult]: At program point L7(line 7) the Hoare annotation is: (and (= sum_~m |sum_#in~m|) (= sum_~n |sum_#in~n|) (<= 1 sum_~n)) [2019-12-07 12:05:22,767 INFO L246 CegarLoopResult]: For program point L7-1(line 7) no Hoare annotation was computed. [2019-12-07 12:05:22,767 INFO L246 CegarLoopResult]: For program point L4(lines 4 8) no Hoare annotation was computed. [2019-12-07 12:05:22,767 INFO L246 CegarLoopResult]: For program point sumFINAL(lines 3 9) no Hoare annotation was computed. [2019-12-07 12:05:22,768 INFO L249 CegarLoopResult]: At program point sumENTRY(lines 3 9) the Hoare annotation is: true [2019-12-07 12:05:22,771 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.12 12:05:22 BoogieIcfgContainer [2019-12-07 12:05:22,771 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-12-07 12:05:22,771 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-12-07 12:05:22,771 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-12-07 12:05:22,771 INFO L275 PluginConnector]: Witness Printer initialized [2019-12-07 12:05:22,772 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 12:05:00" (3/4) ... [2019-12-07 12:05:22,774 INFO L137 WitnessPrinter]: Generating witness for correct program [2019-12-07 12:05:22,778 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure sum [2019-12-07 12:05:22,781 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2019-12-07 12:05:22,781 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2019-12-07 12:05:22,806 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_64af9160-e4a3-4fa9-ba66-a5536c4ce182/bin/uautomizer/witness.graphml [2019-12-07 12:05:22,806 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-12-07 12:05:22,807 INFO L168 Benchmark]: Toolchain (without parser) took 22487.53 ms. Allocated memory was 1.0 GB in the beginning and 1.5 GB in the end (delta: 421.5 MB). Free memory was 943.4 MB in the beginning and 1.1 GB in the end (delta: -146.0 MB). Peak memory consumption was 275.5 MB. Max. memory is 11.5 GB. [2019-12-07 12:05:22,808 INFO L168 Benchmark]: CDTParser took 0.16 ms. Allocated memory is still 1.0 GB. Free memory is still 960.9 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 12:05:22,808 INFO L168 Benchmark]: CACSL2BoogieTranslator took 163.75 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 94.4 MB). Free memory was 943.4 MB in the beginning and 1.1 GB in the end (delta: -145.6 MB). Peak memory consumption was 23.4 MB. Max. memory is 11.5 GB. [2019-12-07 12:05:22,808 INFO L168 Benchmark]: Boogie Procedure Inliner took 19.70 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 12:05:22,808 INFO L168 Benchmark]: Boogie Preprocessor took 9.94 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 12:05:22,808 INFO L168 Benchmark]: RCFGBuilder took 134.60 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 17.0 MB). Peak memory consumption was 17.0 MB. Max. memory is 11.5 GB. [2019-12-07 12:05:22,809 INFO L168 Benchmark]: TraceAbstraction took 22121.52 ms. Allocated memory was 1.1 GB in the beginning and 1.5 GB in the end (delta: 327.2 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: -21.5 MB). Peak memory consumption was 305.6 MB. Max. memory is 11.5 GB. [2019-12-07 12:05:22,809 INFO L168 Benchmark]: Witness Printer took 34.98 ms. Allocated memory is still 1.5 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 4.1 MB). Peak memory consumption was 4.1 MB. Max. memory is 11.5 GB. [2019-12-07 12:05:22,811 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16 ms. Allocated memory is still 1.0 GB. Free memory is still 960.9 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 163.75 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 94.4 MB). Free memory was 943.4 MB in the beginning and 1.1 GB in the end (delta: -145.6 MB). Peak memory consumption was 23.4 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 19.70 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 9.94 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 134.60 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 17.0 MB). Peak memory consumption was 17.0 MB. Max. memory is 11.5 GB. * TraceAbstraction took 22121.52 ms. Allocated memory was 1.1 GB in the beginning and 1.5 GB in the end (delta: 327.2 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: -21.5 MB). Peak memory consumption was 305.6 MB. Max. memory is 11.5 GB. * Witness Printer took 34.98 ms. Allocated memory is still 1.5 GB. Free memory was 1.1 GB in the beginning and 1.1 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: 22.0s, OverallIterations: 21, TraceHistogramMax: 21, AutomataDifference: 8.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 187 SDtfs, 730 SDslu, 1980 SDs, 0 SdLazy, 3532 SolverSat, 248 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2431 GetRequests, 1817 SyntacticMatches, 0 SemanticMatches, 614 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6181 ImplicationChecksByTransitivity, 10.0s 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: 0.0s 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, 0.7s SatisfiabilityAnalysisTime, 8.3s 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...