./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-lit/gj2007.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f470102c Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_f6657297-4ce4-4132-bb97-61f5bb4b20d4/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_f6657297-4ce4-4132-bb97-61f5bb4b20d4/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_f6657297-4ce4-4132-bb97-61f5bb4b20d4/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_f6657297-4ce4-4132-bb97-61f5bb4b20d4/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loop-lit/gj2007.i -s /tmp/vcloud-vcloud-master/worker/run_dir_f6657297-4ce4-4132-bb97-61f5bb4b20d4/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_f6657297-4ce4-4132-bb97-61f5bb4b20d4/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 1a9963030a13e3c679db84f21688cc66372a5ac3 ....................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 11:27:10,513 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-12-07 11:27:10,514 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-12-07 11:27:10,521 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-12-07 11:27:10,522 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-12-07 11:27:10,522 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-12-07 11:27:10,523 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-12-07 11:27:10,525 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-12-07 11:27:10,526 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-12-07 11:27:10,526 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-12-07 11:27:10,527 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-12-07 11:27:10,528 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-12-07 11:27:10,528 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-12-07 11:27:10,529 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-12-07 11:27:10,529 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-12-07 11:27:10,530 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-12-07 11:27:10,531 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-12-07 11:27:10,531 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-12-07 11:27:10,533 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-12-07 11:27:10,534 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-12-07 11:27:10,535 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-12-07 11:27:10,536 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-12-07 11:27:10,537 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-12-07 11:27:10,537 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-12-07 11:27:10,539 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-12-07 11:27:10,539 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-12-07 11:27:10,539 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-12-07 11:27:10,540 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-12-07 11:27:10,540 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-12-07 11:27:10,540 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-12-07 11:27:10,541 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-12-07 11:27:10,541 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-12-07 11:27:10,541 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-12-07 11:27:10,542 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-12-07 11:27:10,543 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-12-07 11:27:10,543 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-12-07 11:27:10,543 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-12-07 11:27:10,543 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-12-07 11:27:10,543 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-12-07 11:27:10,544 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-12-07 11:27:10,544 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-12-07 11:27:10,545 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_f6657297-4ce4-4132-bb97-61f5bb4b20d4/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-12-07 11:27:10,554 INFO L113 SettingsManager]: Loading preferences was successful [2019-12-07 11:27:10,554 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-12-07 11:27:10,555 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-12-07 11:27:10,555 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-12-07 11:27:10,555 INFO L138 SettingsManager]: * Use SBE=true [2019-12-07 11:27:10,556 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-12-07 11:27:10,556 INFO L138 SettingsManager]: * sizeof long=4 [2019-12-07 11:27:10,556 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-12-07 11:27:10,556 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-12-07 11:27:10,556 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-12-07 11:27:10,556 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-12-07 11:27:10,556 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-12-07 11:27:10,557 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-12-07 11:27:10,557 INFO L138 SettingsManager]: * sizeof long double=12 [2019-12-07 11:27:10,557 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-12-07 11:27:10,557 INFO L138 SettingsManager]: * Use constant arrays=true [2019-12-07 11:27:10,557 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-12-07 11:27:10,557 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-12-07 11:27:10,558 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-12-07 11:27:10,558 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-12-07 11:27:10,558 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-12-07 11:27:10,558 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-12-07 11:27:10,558 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-12-07 11:27:10,558 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-12-07 11:27:10,558 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-12-07 11:27:10,558 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-12-07 11:27:10,558 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-12-07 11:27:10,559 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-12-07 11:27:10,559 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2019-12-07 11:27:10,559 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_f6657297-4ce4-4132-bb97-61f5bb4b20d4/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 -> 1a9963030a13e3c679db84f21688cc66372a5ac3 [2019-12-07 11:27:10,656 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-12-07 11:27:10,664 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-12-07 11:27:10,666 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-12-07 11:27:10,667 INFO L271 PluginConnector]: Initializing CDTParser... [2019-12-07 11:27:10,667 INFO L275 PluginConnector]: CDTParser initialized [2019-12-07 11:27:10,667 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_f6657297-4ce4-4132-bb97-61f5bb4b20d4/bin/uautomizer/../../sv-benchmarks/c/loop-lit/gj2007.i [2019-12-07 11:27:10,704 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_f6657297-4ce4-4132-bb97-61f5bb4b20d4/bin/uautomizer/data/d3682d053/4f16b14b38fa4e70afff5b5cbc2b376a/FLAGfe1d573b3 [2019-12-07 11:27:11,116 INFO L306 CDTParser]: Found 1 translation units. [2019-12-07 11:27:11,117 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_f6657297-4ce4-4132-bb97-61f5bb4b20d4/sv-benchmarks/c/loop-lit/gj2007.i [2019-12-07 11:27:11,120 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_f6657297-4ce4-4132-bb97-61f5bb4b20d4/bin/uautomizer/data/d3682d053/4f16b14b38fa4e70afff5b5cbc2b376a/FLAGfe1d573b3 [2019-12-07 11:27:11,128 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_f6657297-4ce4-4132-bb97-61f5bb4b20d4/bin/uautomizer/data/d3682d053/4f16b14b38fa4e70afff5b5cbc2b376a [2019-12-07 11:27:11,130 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-12-07 11:27:11,131 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-12-07 11:27:11,132 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-12-07 11:27:11,132 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-12-07 11:27:11,134 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-12-07 11:27:11,134 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 11:27:11" (1/1) ... [2019-12-07 11:27:11,136 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1ef5444d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 11:27:11, skipping insertion in model container [2019-12-07 11:27:11,136 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 11:27:11" (1/1) ... [2019-12-07 11:27:11,141 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-12-07 11:27:11,151 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-12-07 11:27:11,247 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 11:27:11,250 INFO L203 MainTranslator]: Completed pre-run [2019-12-07 11:27:11,297 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 11:27:11,310 INFO L208 MainTranslator]: Completed translation [2019-12-07 11:27:11,310 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 11:27:11 WrapperNode [2019-12-07 11:27:11,310 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-12-07 11:27:11,311 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-12-07 11:27:11,311 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-12-07 11:27:11,311 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-12-07 11:27:11,319 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 11:27:11" (1/1) ... [2019-12-07 11:27:11,323 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 11:27:11" (1/1) ... [2019-12-07 11:27:11,336 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-12-07 11:27:11,336 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-12-07 11:27:11,336 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-12-07 11:27:11,336 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-12-07 11:27:11,342 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 11:27:11" (1/1) ... [2019-12-07 11:27:11,342 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 11:27:11" (1/1) ... [2019-12-07 11:27:11,343 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 11:27:11" (1/1) ... [2019-12-07 11:27:11,343 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 11:27:11" (1/1) ... [2019-12-07 11:27:11,344 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 11:27:11" (1/1) ... [2019-12-07 11:27:11,347 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 11:27:11" (1/1) ... [2019-12-07 11:27:11,347 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 11:27:11" (1/1) ... [2019-12-07 11:27:11,348 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-12-07 11:27:11,348 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-12-07 11:27:11,348 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-12-07 11:27:11,348 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-12-07 11:27:11,349 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 11:27:11" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f6657297-4ce4-4132-bb97-61f5bb4b20d4/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 11:27:11,388 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-12-07 11:27:11,388 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-12-07 11:27:11,477 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-12-07 11:27:11,477 INFO L287 CfgBuilder]: Removed 7 assume(true) statements. [2019-12-07 11:27:11,478 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 11:27:11 BoogieIcfgContainer [2019-12-07 11:27:11,478 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-12-07 11:27:11,479 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-12-07 11:27:11,479 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-12-07 11:27:11,481 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-12-07 11:27:11,481 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.12 11:27:11" (1/3) ... [2019-12-07 11:27:11,482 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ffc9274 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 11:27:11, skipping insertion in model container [2019-12-07 11:27:11,482 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 11:27:11" (2/3) ... [2019-12-07 11:27:11,482 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ffc9274 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 11:27:11, skipping insertion in model container [2019-12-07 11:27:11,482 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 11:27:11" (3/3) ... [2019-12-07 11:27:11,484 INFO L109 eAbstractionObserver]: Analyzing ICFG gj2007.i [2019-12-07 11:27:11,492 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-12-07 11:27:11,497 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-12-07 11:27:11,506 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-12-07 11:27:11,520 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-12-07 11:27:11,520 INFO L374 AbstractCegarLoop]: Hoare is true [2019-12-07 11:27:11,520 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-12-07 11:27:11,520 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-12-07 11:27:11,520 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-12-07 11:27:11,520 INFO L378 AbstractCegarLoop]: Difference is false [2019-12-07 11:27:11,520 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-12-07 11:27:11,520 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-12-07 11:27:11,529 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states. [2019-12-07 11:27:11,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-12-07 11:27:11,532 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 11:27:11,532 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-12-07 11:27:11,533 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 11:27:11,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 11:27:11,536 INFO L82 PathProgramCache]: Analyzing trace with hash 30108868, now seen corresponding path program 1 times [2019-12-07 11:27:11,541 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 11:27:11,542 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381252262] [2019-12-07 11:27:11,542 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 11:27:11,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:27:11,607 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 11:27:11,607 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381252262] [2019-12-07 11:27:11,608 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 11:27:11,608 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-12-07 11:27:11,609 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218470120] [2019-12-07 11:27:11,612 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-12-07 11:27:11,613 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 11:27:11,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-12-07 11:27:11,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-12-07 11:27:11,623 INFO L87 Difference]: Start difference. First operand 11 states. Second operand 2 states. [2019-12-07 11:27:11,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 11:27:11,634 INFO L93 Difference]: Finished difference Result 19 states and 22 transitions. [2019-12-07 11:27:11,634 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-12-07 11:27:11,635 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 5 [2019-12-07 11:27:11,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 11:27:11,640 INFO L225 Difference]: With dead ends: 19 [2019-12-07 11:27:11,640 INFO L226 Difference]: Without dead ends: 7 [2019-12-07 11:27:11,642 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-12-07 11:27:11,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2019-12-07 11:27:11,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2019-12-07 11:27:11,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2019-12-07 11:27:11,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 8 transitions. [2019-12-07 11:27:11,665 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 8 transitions. Word has length 5 [2019-12-07 11:27:11,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 11:27:11,665 INFO L462 AbstractCegarLoop]: Abstraction has 7 states and 8 transitions. [2019-12-07 11:27:11,665 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-12-07 11:27:11,666 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 8 transitions. [2019-12-07 11:27:11,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-12-07 11:27:11,666 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 11:27:11,666 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-12-07 11:27:11,666 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 11:27:11,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 11:27:11,667 INFO L82 PathProgramCache]: Analyzing trace with hash 29810958, now seen corresponding path program 1 times [2019-12-07 11:27:11,667 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 11:27:11,667 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289204995] [2019-12-07 11:27:11,667 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 11:27:11,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:27:11,686 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 11:27:11,686 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289204995] [2019-12-07 11:27:11,687 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 11:27:11,687 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-12-07 11:27:11,687 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854859772] [2019-12-07 11:27:11,688 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-12-07 11:27:11,688 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 11:27:11,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-12-07 11:27:11,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-12-07 11:27:11,689 INFO L87 Difference]: Start difference. First operand 7 states and 8 transitions. Second operand 3 states. [2019-12-07 11:27:11,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 11:27:11,704 INFO L93 Difference]: Finished difference Result 15 states and 19 transitions. [2019-12-07 11:27:11,705 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-12-07 11:27:11,705 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 5 [2019-12-07 11:27:11,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 11:27:11,705 INFO L225 Difference]: With dead ends: 15 [2019-12-07 11:27:11,705 INFO L226 Difference]: Without dead ends: 9 [2019-12-07 11:27:11,706 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-12-07 11:27:11,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2019-12-07 11:27:11,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2019-12-07 11:27:11,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2019-12-07 11:27:11,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2019-12-07 11:27:11,708 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 10 transitions. Word has length 5 [2019-12-07 11:27:11,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 11:27:11,708 INFO L462 AbstractCegarLoop]: Abstraction has 9 states and 10 transitions. [2019-12-07 11:27:11,708 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-12-07 11:27:11,708 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 10 transitions. [2019-12-07 11:27:11,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-12-07 11:27:11,709 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 11:27:11,709 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-12-07 11:27:11,709 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 11:27:11,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 11:27:11,709 INFO L82 PathProgramCache]: Analyzing trace with hash -1366097711, now seen corresponding path program 1 times [2019-12-07 11:27:11,709 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 11:27:11,709 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781282631] [2019-12-07 11:27:11,709 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 11:27:11,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:27:11,730 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 11:27:11,730 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781282631] [2019-12-07 11:27:11,730 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [465072912] [2019-12-07 11:27:11,731 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f6657297-4ce4-4132-bb97-61f5bb4b20d4/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 11:27:11,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:27:11,754 INFO L264 TraceCheckSpWp]: Trace formula consists of 18 conjuncts, 3 conjunts are in the unsatisfiable core [2019-12-07 11:27:11,757 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 11:27:11,777 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 11:27:11,777 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-12-07 11:27:11,777 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2019-12-07 11:27:11,777 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164156761] [2019-12-07 11:27:11,777 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-12-07 11:27:11,778 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 11:27:11,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-12-07 11:27:11,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-12-07 11:27:11,778 INFO L87 Difference]: Start difference. First operand 9 states and 10 transitions. Second operand 3 states. [2019-12-07 11:27:11,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 11:27:11,790 INFO L93 Difference]: Finished difference Result 15 states and 17 transitions. [2019-12-07 11:27:11,790 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-12-07 11:27:11,790 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 7 [2019-12-07 11:27:11,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 11:27:11,790 INFO L225 Difference]: With dead ends: 15 [2019-12-07 11:27:11,790 INFO L226 Difference]: Without dead ends: 11 [2019-12-07 11:27:11,791 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-12-07 11:27:11,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2019-12-07 11:27:11,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 10. [2019-12-07 11:27:11,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2019-12-07 11:27:11,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 11 transitions. [2019-12-07 11:27:11,793 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 11 transitions. Word has length 7 [2019-12-07 11:27:11,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 11:27:11,793 INFO L462 AbstractCegarLoop]: Abstraction has 10 states and 11 transitions. [2019-12-07 11:27:11,793 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-12-07 11:27:11,793 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 11 transitions. [2019-12-07 11:27:11,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-12-07 11:27:11,793 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 11:27:11,794 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 11:27:11,994 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 11:27:11,995 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 11:27:11,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 11:27:11,995 INFO L82 PathProgramCache]: Analyzing trace with hash 1492282070, now seen corresponding path program 1 times [2019-12-07 11:27:11,995 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 11:27:11,996 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900351405] [2019-12-07 11:27:11,996 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 11:27:12,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:27:12,034 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 11:27:12,035 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900351405] [2019-12-07 11:27:12,035 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [420031062] [2019-12-07 11:27:12,035 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f6657297-4ce4-4132-bb97-61f5bb4b20d4/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 11:27:12,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:27:12,061 INFO L264 TraceCheckSpWp]: Trace formula consists of 24 conjuncts, 3 conjunts are in the unsatisfiable core [2019-12-07 11:27:12,062 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 11:27:12,066 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 11:27:12,066 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 11:27:12,066 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2019-12-07 11:27:12,066 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549821408] [2019-12-07 11:27:12,067 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-12-07 11:27:12,067 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 11:27:12,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-12-07 11:27:12,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-12-07 11:27:12,068 INFO L87 Difference]: Start difference. First operand 10 states and 11 transitions. Second operand 4 states. [2019-12-07 11:27:12,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 11:27:12,084 INFO L93 Difference]: Finished difference Result 19 states and 22 transitions. [2019-12-07 11:27:12,085 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-12-07 11:27:12,085 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 9 [2019-12-07 11:27:12,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 11:27:12,085 INFO L225 Difference]: With dead ends: 19 [2019-12-07 11:27:12,085 INFO L226 Difference]: Without dead ends: 12 [2019-12-07 11:27:12,085 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-12-07 11:27:12,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2019-12-07 11:27:12,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2019-12-07 11:27:12,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2019-12-07 11:27:12,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions. [2019-12-07 11:27:12,088 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 13 transitions. Word has length 9 [2019-12-07 11:27:12,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 11:27:12,088 INFO L462 AbstractCegarLoop]: Abstraction has 12 states and 13 transitions. [2019-12-07 11:27:12,088 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-12-07 11:27:12,088 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 13 transitions. [2019-12-07 11:27:12,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-07 11:27:12,088 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 11:27:12,088 INFO L410 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1] [2019-12-07 11:27:12,289 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 11:27:12,289 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 11:27:12,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 11:27:12,289 INFO L82 PathProgramCache]: Analyzing trace with hash 2136142105, now seen corresponding path program 2 times [2019-12-07 11:27:12,290 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 11:27:12,290 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500337983] [2019-12-07 11:27:12,290 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 11:27:12,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:27:12,353 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 11:27:12,353 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500337983] [2019-12-07 11:27:12,353 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1198028379] [2019-12-07 11:27:12,354 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f6657297-4ce4-4132-bb97-61f5bb4b20d4/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 11:27:12,379 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-07 11:27:12,379 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 11:27:12,379 INFO L264 TraceCheckSpWp]: Trace formula consists of 28 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-07 11:27:12,380 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 11:27:12,384 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 11:27:12,384 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 11:27:12,384 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2019-12-07 11:27:12,385 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637915968] [2019-12-07 11:27:12,385 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-12-07 11:27:12,385 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 11:27:12,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-12-07 11:27:12,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-12-07 11:27:12,386 INFO L87 Difference]: Start difference. First operand 12 states and 13 transitions. Second operand 6 states. [2019-12-07 11:27:12,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 11:27:12,409 INFO L93 Difference]: Finished difference Result 23 states and 27 transitions. [2019-12-07 11:27:12,409 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-12-07 11:27:12,409 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 11 [2019-12-07 11:27:12,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 11:27:12,410 INFO L225 Difference]: With dead ends: 23 [2019-12-07 11:27:12,410 INFO L226 Difference]: Without dead ends: 16 [2019-12-07 11:27:12,410 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-12-07 11:27:12,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2019-12-07 11:27:12,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2019-12-07 11:27:12,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2019-12-07 11:27:12,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2019-12-07 11:27:12,414 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 11 [2019-12-07 11:27:12,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 11:27:12,414 INFO L462 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2019-12-07 11:27:12,414 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-12-07 11:27:12,414 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2019-12-07 11:27:12,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-12-07 11:27:12,415 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 11:27:12,415 INFO L410 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1] [2019-12-07 11:27:12,615 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 11:27:12,616 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 11:27:12,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 11:27:12,616 INFO L82 PathProgramCache]: Analyzing trace with hash -368533665, now seen corresponding path program 3 times [2019-12-07 11:27:12,617 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 11:27:12,617 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000130161] [2019-12-07 11:27:12,617 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 11:27:12,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:27:12,711 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 11:27:12,711 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000130161] [2019-12-07 11:27:12,711 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [486573310] [2019-12-07 11:27:12,712 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f6657297-4ce4-4132-bb97-61f5bb4b20d4/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 11:27:12,745 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-12-07 11:27:12,745 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 11:27:12,746 INFO L264 TraceCheckSpWp]: Trace formula consists of 28 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-07 11:27:12,747 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 11:27:12,779 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-12-07 11:27:12,779 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 11:27:12,779 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4] total 10 [2019-12-07 11:27:12,780 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058522417] [2019-12-07 11:27:12,780 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-07 11:27:12,780 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 11:27:12,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-07 11:27:12,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-12-07 11:27:12,781 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand 10 states. [2019-12-07 11:27:12,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 11:27:12,824 INFO L93 Difference]: Finished difference Result 30 states and 37 transitions. [2019-12-07 11:27:12,824 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-07 11:27:12,824 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 15 [2019-12-07 11:27:12,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 11:27:12,826 INFO L225 Difference]: With dead ends: 30 [2019-12-07 11:27:12,826 INFO L226 Difference]: Without dead ends: 23 [2019-12-07 11:27:12,827 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-12-07 11:27:12,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2019-12-07 11:27:12,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2019-12-07 11:27:12,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-12-07 11:27:12,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2019-12-07 11:27:12,832 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 15 [2019-12-07 11:27:12,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 11:27:12,832 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2019-12-07 11:27:12,832 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-07 11:27:12,832 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2019-12-07 11:27:12,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-12-07 11:27:12,833 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 11:27:12,833 INFO L410 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1, 1, 1] [2019-12-07 11:27:13,034 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 11:27:13,034 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 11:27:13,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 11:27:13,035 INFO L82 PathProgramCache]: Analyzing trace with hash 1336541098, now seen corresponding path program 4 times [2019-12-07 11:27:13,035 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 11:27:13,036 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979900908] [2019-12-07 11:27:13,036 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 11:27:13,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:27:13,121 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 11:27:13,122 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979900908] [2019-12-07 11:27:13,122 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [969173993] [2019-12-07 11:27:13,122 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f6657297-4ce4-4132-bb97-61f5bb4b20d4/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 11:27:13,139 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-07 11:27:13,140 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 11:27:13,140 INFO L264 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-07 11:27:13,141 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 11:27:13,146 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 21 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-07 11:27:13,146 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 11:27:13,146 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 10 [2019-12-07 11:27:13,147 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564638693] [2019-12-07 11:27:13,147 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-12-07 11:27:13,147 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 11:27:13,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-12-07 11:27:13,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-12-07 11:27:13,148 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand 11 states. [2019-12-07 11:27:13,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 11:27:13,180 INFO L93 Difference]: Finished difference Result 37 states and 44 transitions. [2019-12-07 11:27:13,180 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-12-07 11:27:13,180 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 21 [2019-12-07 11:27:13,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 11:27:13,180 INFO L225 Difference]: With dead ends: 37 [2019-12-07 11:27:13,181 INFO L226 Difference]: Without dead ends: 28 [2019-12-07 11:27:13,181 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-12-07 11:27:13,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-12-07 11:27:13,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2019-12-07 11:27:13,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-12-07 11:27:13,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2019-12-07 11:27:13,184 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 21 [2019-12-07 11:27:13,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 11:27:13,185 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2019-12-07 11:27:13,185 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-12-07 11:27:13,185 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2019-12-07 11:27:13,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-12-07 11:27:13,185 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 11:27:13,185 INFO L410 BasicCegarLoop]: trace histogram [11, 9, 2, 1, 1, 1, 1, 1] [2019-12-07 11:27:13,386 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 11:27:13,386 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 11:27:13,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 11:27:13,386 INFO L82 PathProgramCache]: Analyzing trace with hash 825274035, now seen corresponding path program 5 times [2019-12-07 11:27:13,386 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 11:27:13,386 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467418148] [2019-12-07 11:27:13,387 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 11:27:13,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:27:13,470 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 11:27:13,471 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467418148] [2019-12-07 11:27:13,471 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [175346377] [2019-12-07 11:27:13,471 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f6657297-4ce4-4132-bb97-61f5bb4b20d4/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 11:27:13,492 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2019-12-07 11:27:13,492 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 11:27:13,493 INFO L264 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-07 11:27:13,494 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 11:27:13,503 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 30 proven. 90 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-07 11:27:13,503 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 11:27:13,503 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 13 [2019-12-07 11:27:13,503 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561258515] [2019-12-07 11:27:13,504 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-07 11:27:13,504 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 11:27:13,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-07 11:27:13,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2019-12-07 11:27:13,504 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 14 states. [2019-12-07 11:27:13,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 11:27:13,550 INFO L93 Difference]: Finished difference Result 43 states and 50 transitions. [2019-12-07 11:27:13,550 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-12-07 11:27:13,550 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 27 [2019-12-07 11:27:13,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 11:27:13,551 INFO L225 Difference]: With dead ends: 43 [2019-12-07 11:27:13,551 INFO L226 Difference]: Without dead ends: 34 [2019-12-07 11:27:13,551 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2019-12-07 11:27:13,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2019-12-07 11:27:13,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2019-12-07 11:27:13,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-12-07 11:27:13,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 36 transitions. [2019-12-07 11:27:13,555 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 36 transitions. Word has length 27 [2019-12-07 11:27:13,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 11:27:13,555 INFO L462 AbstractCegarLoop]: Abstraction has 34 states and 36 transitions. [2019-12-07 11:27:13,556 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-07 11:27:13,556 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 36 transitions. [2019-12-07 11:27:13,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2019-12-07 11:27:13,556 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 11:27:13,556 INFO L410 BasicCegarLoop]: trace histogram [14, 12, 2, 1, 1, 1, 1, 1] [2019-12-07 11:27:13,757 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 11:27:13,757 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 11:27:13,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 11:27:13,757 INFO L82 PathProgramCache]: Analyzing trace with hash -1798294788, now seen corresponding path program 6 times [2019-12-07 11:27:13,757 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 11:27:13,758 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709838800] [2019-12-07 11:27:13,758 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 11:27:13,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:27:13,884 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 11:27:13,884 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709838800] [2019-12-07 11:27:13,884 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1363358136] [2019-12-07 11:27:13,884 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f6657297-4ce4-4132-bb97-61f5bb4b20d4/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 11:27:13,905 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2019-12-07 11:27:13,905 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 11:27:13,906 INFO L264 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 5 conjunts are in the unsatisfiable core [2019-12-07 11:27:13,907 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 11:27:13,950 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 60 proven. 4 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2019-12-07 11:27:13,950 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 11:27:13,950 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 5] total 20 [2019-12-07 11:27:13,951 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054941367] [2019-12-07 11:27:13,951 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-12-07 11:27:13,951 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 11:27:13,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-12-07 11:27:13,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2019-12-07 11:27:13,952 INFO L87 Difference]: Start difference. First operand 34 states and 36 transitions. Second operand 20 states. [2019-12-07 11:27:14,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 11:27:14,007 INFO L93 Difference]: Finished difference Result 52 states and 62 transitions. [2019-12-07 11:27:14,007 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-12-07 11:27:14,007 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 33 [2019-12-07 11:27:14,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 11:27:14,008 INFO L225 Difference]: With dead ends: 52 [2019-12-07 11:27:14,008 INFO L226 Difference]: Without dead ends: 43 [2019-12-07 11:27:14,008 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2019-12-07 11:27:14,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2019-12-07 11:27:14,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2019-12-07 11:27:14,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-12-07 11:27:14,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 45 transitions. [2019-12-07 11:27:14,012 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 45 transitions. Word has length 33 [2019-12-07 11:27:14,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 11:27:14,013 INFO L462 AbstractCegarLoop]: Abstraction has 42 states and 45 transitions. [2019-12-07 11:27:14,013 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-12-07 11:27:14,013 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 45 transitions. [2019-12-07 11:27:14,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2019-12-07 11:27:14,014 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 11:27:14,014 INFO L410 BasicCegarLoop]: trace histogram [18, 15, 3, 1, 1, 1, 1, 1] [2019-12-07 11:27:14,214 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 11:27:14,215 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 11:27:14,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 11:27:14,215 INFO L82 PathProgramCache]: Analyzing trace with hash -1978996342, now seen corresponding path program 7 times [2019-12-07 11:27:14,216 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 11:27:14,216 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102709740] [2019-12-07 11:27:14,216 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 11:27:14,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:27:14,526 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 11:27:14,526 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102709740] [2019-12-07 11:27:14,526 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1239001037] [2019-12-07 11:27:14,526 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f6657297-4ce4-4132-bb97-61f5bb4b20d4/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 11:27:14,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:27:14,546 INFO L264 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 17 conjunts are in the unsatisfiable core [2019-12-07 11:27:14,547 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 11:27:14,556 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 80 proven. 240 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-12-07 11:27:14,556 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 11:27:14,556 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 17] total 20 [2019-12-07 11:27:14,556 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319138381] [2019-12-07 11:27:14,556 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-12-07 11:27:14,557 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 11:27:14,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-12-07 11:27:14,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2019-12-07 11:27:14,557 INFO L87 Difference]: Start difference. First operand 42 states and 45 transitions. Second operand 21 states. [2019-12-07 11:27:14,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 11:27:14,608 INFO L93 Difference]: Finished difference Result 61 states and 71 transitions. [2019-12-07 11:27:14,609 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-12-07 11:27:14,609 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 41 [2019-12-07 11:27:14,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 11:27:14,609 INFO L225 Difference]: With dead ends: 61 [2019-12-07 11:27:14,609 INFO L226 Difference]: Without dead ends: 50 [2019-12-07 11:27:14,610 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2019-12-07 11:27:14,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2019-12-07 11:27:14,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2019-12-07 11:27:14,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2019-12-07 11:27:14,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 53 transitions. [2019-12-07 11:27:14,614 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 53 transitions. Word has length 41 [2019-12-07 11:27:14,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 11:27:14,614 INFO L462 AbstractCegarLoop]: Abstraction has 50 states and 53 transitions. [2019-12-07 11:27:14,614 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-12-07 11:27:14,614 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 53 transitions. [2019-12-07 11:27:14,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2019-12-07 11:27:14,615 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 11:27:14,615 INFO L410 BasicCegarLoop]: trace histogram [22, 19, 3, 1, 1, 1, 1, 1] [2019-12-07 11:27:14,816 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 11:27:14,816 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 11:27:14,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 11:27:14,817 INFO L82 PathProgramCache]: Analyzing trace with hash -388925930, now seen corresponding path program 8 times [2019-12-07 11:27:14,817 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 11:27:14,817 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784699811] [2019-12-07 11:27:14,817 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 11:27:14,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:27:15,052 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 11:27:15,052 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784699811] [2019-12-07 11:27:15,052 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2040428807] [2019-12-07 11:27:15,052 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f6657297-4ce4-4132-bb97-61f5bb4b20d4/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 11:27:15,073 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-07 11:27:15,073 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 11:27:15,073 INFO L264 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 21 conjunts are in the unsatisfiable core [2019-12-07 11:27:15,075 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 11:27:15,089 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 100 proven. 380 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-12-07 11:27:15,089 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 11:27:15,089 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 21] total 24 [2019-12-07 11:27:15,089 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770146602] [2019-12-07 11:27:15,090 INFO L442 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-12-07 11:27:15,090 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 11:27:15,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-12-07 11:27:15,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2019-12-07 11:27:15,091 INFO L87 Difference]: Start difference. First operand 50 states and 53 transitions. Second operand 25 states. [2019-12-07 11:27:15,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 11:27:15,150 INFO L93 Difference]: Finished difference Result 69 states and 79 transitions. [2019-12-07 11:27:15,150 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-12-07 11:27:15,150 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 49 [2019-12-07 11:27:15,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 11:27:15,151 INFO L225 Difference]: With dead ends: 69 [2019-12-07 11:27:15,151 INFO L226 Difference]: Without dead ends: 58 [2019-12-07 11:27:15,151 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2019-12-07 11:27:15,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2019-12-07 11:27:15,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2019-12-07 11:27:15,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2019-12-07 11:27:15,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 61 transitions. [2019-12-07 11:27:15,155 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 61 transitions. Word has length 49 [2019-12-07 11:27:15,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 11:27:15,156 INFO L462 AbstractCegarLoop]: Abstraction has 58 states and 61 transitions. [2019-12-07 11:27:15,156 INFO L463 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-12-07 11:27:15,156 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 61 transitions. [2019-12-07 11:27:15,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2019-12-07 11:27:15,156 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 11:27:15,156 INFO L410 BasicCegarLoop]: trace histogram [26, 23, 3, 1, 1, 1, 1, 1] [2019-12-07 11:27:15,357 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 11:27:15,358 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 11:27:15,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 11:27:15,358 INFO L82 PathProgramCache]: Analyzing trace with hash -1548175710, now seen corresponding path program 9 times [2019-12-07 11:27:15,358 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 11:27:15,359 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618581084] [2019-12-07 11:27:15,359 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 11:27:15,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:27:15,656 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 11:27:15,657 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618581084] [2019-12-07 11:27:15,657 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [945210914] [2019-12-07 11:27:15,657 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f6657297-4ce4-4132-bb97-61f5bb4b20d4/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 11:27:15,677 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2019-12-07 11:27:15,677 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 11:27:15,678 INFO L264 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 6 conjunts are in the unsatisfiable core [2019-12-07 11:27:15,679 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 11:27:15,760 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 161 proven. 9 refuted. 0 times theorem prover too weak. 506 trivial. 0 not checked. [2019-12-07 11:27:15,760 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 11:27:15,760 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 6] total 33 [2019-12-07 11:27:15,760 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732741783] [2019-12-07 11:27:15,761 INFO L442 AbstractCegarLoop]: Interpolant automaton has 33 states [2019-12-07 11:27:15,761 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 11:27:15,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2019-12-07 11:27:15,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2019-12-07 11:27:15,762 INFO L87 Difference]: Start difference. First operand 58 states and 61 transitions. Second operand 33 states. [2019-12-07 11:27:15,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 11:27:15,843 INFO L93 Difference]: Finished difference Result 80 states and 93 transitions. [2019-12-07 11:27:15,843 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2019-12-07 11:27:15,843 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 57 [2019-12-07 11:27:15,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 11:27:15,844 INFO L225 Difference]: With dead ends: 80 [2019-12-07 11:27:15,844 INFO L226 Difference]: Without dead ends: 69 [2019-12-07 11:27:15,845 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2019-12-07 11:27:15,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2019-12-07 11:27:15,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 68. [2019-12-07 11:27:15,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2019-12-07 11:27:15,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 72 transitions. [2019-12-07 11:27:15,849 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 72 transitions. Word has length 57 [2019-12-07 11:27:15,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 11:27:15,850 INFO L462 AbstractCegarLoop]: Abstraction has 68 states and 72 transitions. [2019-12-07 11:27:15,850 INFO L463 AbstractCegarLoop]: Interpolant automaton has 33 states. [2019-12-07 11:27:15,850 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 72 transitions. [2019-12-07 11:27:15,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2019-12-07 11:27:15,850 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 11:27:15,850 INFO L410 BasicCegarLoop]: trace histogram [31, 27, 4, 1, 1, 1, 1, 1] [2019-12-07 11:27:16,051 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 11:27:16,052 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 11:27:16,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 11:27:16,053 INFO L82 PathProgramCache]: Analyzing trace with hash -1150619149, now seen corresponding path program 10 times [2019-12-07 11:27:16,053 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 11:27:16,054 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460445338] [2019-12-07 11:27:16,054 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 11:27:16,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:27:16,585 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 11:27:16,585 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460445338] [2019-12-07 11:27:16,585 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1740019774] [2019-12-07 11:27:16,585 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f6657297-4ce4-4132-bb97-61f5bb4b20d4/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 11:27:16,622 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-07 11:27:16,622 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 11:27:16,623 INFO L264 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 29 conjunts are in the unsatisfiable core [2019-12-07 11:27:16,626 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 11:27:16,641 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 196 proven. 756 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-12-07 11:27:16,641 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 11:27:16,641 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 29] total 33 [2019-12-07 11:27:16,642 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079253243] [2019-12-07 11:27:16,642 INFO L442 AbstractCegarLoop]: Interpolant automaton has 34 states [2019-12-07 11:27:16,642 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 11:27:16,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2019-12-07 11:27:16,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2019-12-07 11:27:16,643 INFO L87 Difference]: Start difference. First operand 68 states and 72 transitions. Second operand 34 states. [2019-12-07 11:27:16,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 11:27:16,730 INFO L93 Difference]: Finished difference Result 91 states and 104 transitions. [2019-12-07 11:27:16,730 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-12-07 11:27:16,730 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 67 [2019-12-07 11:27:16,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 11:27:16,731 INFO L225 Difference]: With dead ends: 91 [2019-12-07 11:27:16,731 INFO L226 Difference]: Without dead ends: 78 [2019-12-07 11:27:16,731 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2019-12-07 11:27:16,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2019-12-07 11:27:16,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2019-12-07 11:27:16,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2019-12-07 11:27:16,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 82 transitions. [2019-12-07 11:27:16,737 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 82 transitions. Word has length 67 [2019-12-07 11:27:16,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 11:27:16,738 INFO L462 AbstractCegarLoop]: Abstraction has 78 states and 82 transitions. [2019-12-07 11:27:16,738 INFO L463 AbstractCegarLoop]: Interpolant automaton has 34 states. [2019-12-07 11:27:16,738 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 82 transitions. [2019-12-07 11:27:16,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2019-12-07 11:27:16,739 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 11:27:16,739 INFO L410 BasicCegarLoop]: trace histogram [36, 32, 4, 1, 1, 1, 1, 1] [2019-12-07 11:27:16,940 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 11:27:16,940 INFO L410 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 11:27:16,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 11:27:16,941 INFO L82 PathProgramCache]: Analyzing trace with hash 351932674, now seen corresponding path program 11 times [2019-12-07 11:27:16,941 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 11:27:16,941 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877873328] [2019-12-07 11:27:16,941 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 11:27:16,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:27:17,463 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 11:27:17,463 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877873328] [2019-12-07 11:27:17,463 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [895966493] [2019-12-07 11:27:17,464 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f6657297-4ce4-4132-bb97-61f5bb4b20d4/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 11:27:17,506 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 37 check-sat command(s) [2019-12-07 11:27:17,507 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 11:27:17,508 INFO L264 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 34 conjunts are in the unsatisfiable core [2019-12-07 11:27:17,510 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 11:27:17,526 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 231 proven. 1056 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-12-07 11:27:17,526 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 11:27:17,527 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 34] total 38 [2019-12-07 11:27:17,527 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466910418] [2019-12-07 11:27:17,527 INFO L442 AbstractCegarLoop]: Interpolant automaton has 39 states [2019-12-07 11:27:17,527 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 11:27:17,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2019-12-07 11:27:17,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2019-12-07 11:27:17,528 INFO L87 Difference]: Start difference. First operand 78 states and 82 transitions. Second operand 39 states. [2019-12-07 11:27:17,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 11:27:17,638 INFO L93 Difference]: Finished difference Result 101 states and 114 transitions. [2019-12-07 11:27:17,639 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2019-12-07 11:27:17,639 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 77 [2019-12-07 11:27:17,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 11:27:17,639 INFO L225 Difference]: With dead ends: 101 [2019-12-07 11:27:17,640 INFO L226 Difference]: Without dead ends: 88 [2019-12-07 11:27:17,640 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2019-12-07 11:27:17,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2019-12-07 11:27:17,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2019-12-07 11:27:17,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2019-12-07 11:27:17,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 92 transitions. [2019-12-07 11:27:17,646 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 92 transitions. Word has length 77 [2019-12-07 11:27:17,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 11:27:17,646 INFO L462 AbstractCegarLoop]: Abstraction has 88 states and 92 transitions. [2019-12-07 11:27:17,646 INFO L463 AbstractCegarLoop]: Interpolant automaton has 39 states. [2019-12-07 11:27:17,646 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 92 transitions. [2019-12-07 11:27:17,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2019-12-07 11:27:17,647 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 11:27:17,647 INFO L410 BasicCegarLoop]: trace histogram [41, 37, 4, 1, 1, 1, 1, 1] [2019-12-07 11:27:17,848 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 11:27:17,849 INFO L410 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 11:27:17,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 11:27:17,849 INFO L82 PathProgramCache]: Analyzing trace with hash 1926555985, now seen corresponding path program 12 times [2019-12-07 11:27:17,849 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 11:27:17,849 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516068041] [2019-12-07 11:27:17,850 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 11:27:17,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:27:18,470 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 0 proven. 1681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 11:27:18,470 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516068041] [2019-12-07 11:27:18,471 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1231410774] [2019-12-07 11:27:18,471 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f6657297-4ce4-4132-bb97-61f5bb4b20d4/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 11:27:18,495 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2019-12-07 11:27:18,495 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 11:27:18,496 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 7 conjunts are in the unsatisfiable core [2019-12-07 11:27:18,497 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 11:27:18,633 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 333 proven. 16 refuted. 0 times theorem prover too weak. 1332 trivial. 0 not checked. [2019-12-07 11:27:18,633 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 11:27:18,633 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 7] total 49 [2019-12-07 11:27:18,633 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829844467] [2019-12-07 11:27:18,634 INFO L442 AbstractCegarLoop]: Interpolant automaton has 49 states [2019-12-07 11:27:18,634 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 11:27:18,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2019-12-07 11:27:18,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2019-12-07 11:27:18,635 INFO L87 Difference]: Start difference. First operand 88 states and 92 transitions. Second operand 49 states. [2019-12-07 11:27:18,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 11:27:18,762 INFO L93 Difference]: Finished difference Result 114 states and 130 transitions. [2019-12-07 11:27:18,762 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2019-12-07 11:27:18,762 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 87 [2019-12-07 11:27:18,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 11:27:18,763 INFO L225 Difference]: With dead ends: 114 [2019-12-07 11:27:18,763 INFO L226 Difference]: Without dead ends: 101 [2019-12-07 11:27:18,764 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2019-12-07 11:27:18,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2019-12-07 11:27:18,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 100. [2019-12-07 11:27:18,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2019-12-07 11:27:18,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 105 transitions. [2019-12-07 11:27:18,769 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 105 transitions. Word has length 87 [2019-12-07 11:27:18,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 11:27:18,769 INFO L462 AbstractCegarLoop]: Abstraction has 100 states and 105 transitions. [2019-12-07 11:27:18,770 INFO L463 AbstractCegarLoop]: Interpolant automaton has 49 states. [2019-12-07 11:27:18,770 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 105 transitions. [2019-12-07 11:27:18,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2019-12-07 11:27:18,770 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 11:27:18,770 INFO L410 BasicCegarLoop]: trace histogram [47, 42, 5, 1, 1, 1, 1, 1] [2019-12-07 11:27:18,971 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 11:27:18,971 INFO L410 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 11:27:18,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 11:27:18,972 INFO L82 PathProgramCache]: Analyzing trace with hash -1558049499, now seen corresponding path program 13 times [2019-12-07 11:27:18,972 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 11:27:18,972 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136675500] [2019-12-07 11:27:18,972 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 11:27:18,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:27:19,700 INFO L134 CoverageAnalysis]: Checked inductivity of 2209 backedges. 0 proven. 2209 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 11:27:19,700 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136675500] [2019-12-07 11:27:19,700 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2033945769] [2019-12-07 11:27:19,701 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f6657297-4ce4-4132-bb97-61f5bb4b20d4/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 11:27:19,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:27:19,728 INFO L264 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 44 conjunts are in the unsatisfiable core [2019-12-07 11:27:19,731 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 11:27:19,756 INFO L134 CoverageAnalysis]: Checked inductivity of 2209 backedges. 387 proven. 1806 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-12-07 11:27:19,756 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 11:27:19,756 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 44] total 49 [2019-12-07 11:27:19,757 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571509787] [2019-12-07 11:27:19,757 INFO L442 AbstractCegarLoop]: Interpolant automaton has 50 states [2019-12-07 11:27:19,757 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 11:27:19,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2019-12-07 11:27:19,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2019-12-07 11:27:19,758 INFO L87 Difference]: Start difference. First operand 100 states and 105 transitions. Second operand 50 states. [2019-12-07 11:27:19,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 11:27:19,884 INFO L93 Difference]: Finished difference Result 127 states and 143 transitions. [2019-12-07 11:27:19,884 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2019-12-07 11:27:19,885 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 99 [2019-12-07 11:27:19,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 11:27:19,885 INFO L225 Difference]: With dead ends: 127 [2019-12-07 11:27:19,885 INFO L226 Difference]: Without dead ends: 112 [2019-12-07 11:27:19,886 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2019-12-07 11:27:19,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2019-12-07 11:27:19,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2019-12-07 11:27:19,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2019-12-07 11:27:19,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 117 transitions. [2019-12-07 11:27:19,890 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 117 transitions. Word has length 99 [2019-12-07 11:27:19,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 11:27:19,890 INFO L462 AbstractCegarLoop]: Abstraction has 112 states and 117 transitions. [2019-12-07 11:27:19,890 INFO L463 AbstractCegarLoop]: Interpolant automaton has 50 states. [2019-12-07 11:27:19,890 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 117 transitions. [2019-12-07 11:27:19,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2019-12-07 11:27:19,891 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 11:27:19,891 INFO L410 BasicCegarLoop]: trace histogram [53, 48, 5, 1, 1, 1, 1, 1] [2019-12-07 11:27:20,092 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 11:27:20,092 INFO L410 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 11:27:20,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 11:27:20,093 INFO L82 PathProgramCache]: Analyzing trace with hash 770930935, now seen corresponding path program 14 times [2019-12-07 11:27:20,093 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 11:27:20,093 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556263842] [2019-12-07 11:27:20,093 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 11:27:20,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:27:20,984 INFO L134 CoverageAnalysis]: Checked inductivity of 2809 backedges. 0 proven. 2809 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 11:27:20,985 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556263842] [2019-12-07 11:27:20,985 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [502373983] [2019-12-07 11:27:20,985 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f6657297-4ce4-4132-bb97-61f5bb4b20d4/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 11:27:21,015 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-07 11:27:21,015 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 11:27:21,016 INFO L264 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 50 conjunts are in the unsatisfiable core [2019-12-07 11:27:21,017 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 11:27:21,038 INFO L134 CoverageAnalysis]: Checked inductivity of 2809 backedges. 441 proven. 2352 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-12-07 11:27:21,038 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 11:27:21,039 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 50] total 55 [2019-12-07 11:27:21,039 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255128390] [2019-12-07 11:27:21,039 INFO L442 AbstractCegarLoop]: Interpolant automaton has 56 states [2019-12-07 11:27:21,039 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 11:27:21,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2019-12-07 11:27:21,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2019-12-07 11:27:21,040 INFO L87 Difference]: Start difference. First operand 112 states and 117 transitions. Second operand 56 states. [2019-12-07 11:27:21,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 11:27:21,153 INFO L93 Difference]: Finished difference Result 131 states and 143 transitions. [2019-12-07 11:27:21,154 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2019-12-07 11:27:21,154 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 111 [2019-12-07 11:27:21,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 11:27:21,154 INFO L225 Difference]: With dead ends: 131 [2019-12-07 11:27:21,154 INFO L226 Difference]: Without dead ends: 116 [2019-12-07 11:27:21,155 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2019-12-07 11:27:21,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2019-12-07 11:27:21,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 116. [2019-12-07 11:27:21,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2019-12-07 11:27:21,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 121 transitions. [2019-12-07 11:27:21,159 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 121 transitions. Word has length 111 [2019-12-07 11:27:21,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 11:27:21,159 INFO L462 AbstractCegarLoop]: Abstraction has 116 states and 121 transitions. [2019-12-07 11:27:21,159 INFO L463 AbstractCegarLoop]: Interpolant automaton has 56 states. [2019-12-07 11:27:21,160 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 121 transitions. [2019-12-07 11:27:21,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2019-12-07 11:27:21,160 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 11:27:21,160 INFO L410 BasicCegarLoop]: trace histogram [55, 50, 5, 1, 1, 1, 1, 1] [2019-12-07 11:27:21,361 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 11:27:21,361 INFO L410 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 11:27:21,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 11:27:21,361 INFO L82 PathProgramCache]: Analyzing trace with hash 9489469, now seen corresponding path program 15 times [2019-12-07 11:27:21,362 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 11:27:21,362 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241070568] [2019-12-07 11:27:21,362 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 11:27:21,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:27:22,317 INFO L134 CoverageAnalysis]: Checked inductivity of 3025 backedges. 0 proven. 3025 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 11:27:22,317 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241070568] [2019-12-07 11:27:22,318 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [603240462] [2019-12-07 11:27:22,318 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f6657297-4ce4-4132-bb97-61f5bb4b20d4/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 11:27:22,340 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2019-12-07 11:27:22,340 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 11:27:22,340 INFO L264 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-07 11:27:22,342 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 11:27:22,359 INFO L134 CoverageAnalysis]: Checked inductivity of 3025 backedges. 550 proven. 25 refuted. 0 times theorem prover too weak. 2450 trivial. 0 not checked. [2019-12-07 11:27:22,359 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 11:27:22,360 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 8] total 58 [2019-12-07 11:27:22,360 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935414210] [2019-12-07 11:27:22,360 INFO L442 AbstractCegarLoop]: Interpolant automaton has 58 states [2019-12-07 11:27:22,360 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 11:27:22,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2019-12-07 11:27:22,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2019-12-07 11:27:22,361 INFO L87 Difference]: Start difference. First operand 116 states and 121 transitions. Second operand 58 states. [2019-12-07 11:27:22,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 11:27:22,475 INFO L93 Difference]: Finished difference Result 123 states and 130 transitions. [2019-12-07 11:27:22,475 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2019-12-07 11:27:22,475 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 115 [2019-12-07 11:27:22,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 11:27:22,476 INFO L225 Difference]: With dead ends: 123 [2019-12-07 11:27:22,476 INFO L226 Difference]: Without dead ends: 119 [2019-12-07 11:27:22,477 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2019-12-07 11:27:22,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2019-12-07 11:27:22,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 118. [2019-12-07 11:27:22,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2019-12-07 11:27:22,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 124 transitions. [2019-12-07 11:27:22,481 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 124 transitions. Word has length 115 [2019-12-07 11:27:22,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 11:27:22,482 INFO L462 AbstractCegarLoop]: Abstraction has 118 states and 124 transitions. [2019-12-07 11:27:22,482 INFO L463 AbstractCegarLoop]: Interpolant automaton has 58 states. [2019-12-07 11:27:22,482 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 124 transitions. [2019-12-07 11:27:22,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2019-12-07 11:27:22,483 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 11:27:22,483 INFO L410 BasicCegarLoop]: trace histogram [56, 50, 6, 1, 1, 1, 1, 1] [2019-12-07 11:27:22,683 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 11:27:22,684 INFO L410 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 11:27:22,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 11:27:22,684 INFO L82 PathProgramCache]: Analyzing trace with hash 581634882, now seen corresponding path program 16 times [2019-12-07 11:27:22,684 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 11:27:22,685 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655626672] [2019-12-07 11:27:22,685 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 11:27:22,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:27:23,677 INFO L134 CoverageAnalysis]: Checked inductivity of 3136 backedges. 0 proven. 3136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 11:27:23,677 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655626672] [2019-12-07 11:27:23,677 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [988321025] [2019-12-07 11:27:23,677 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f6657297-4ce4-4132-bb97-61f5bb4b20d4/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 11:27:23,710 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-07 11:27:23,710 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 11:27:23,711 INFO L264 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 58 conjunts are in the unsatisfiable core [2019-12-07 11:27:23,712 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 11:27:23,735 INFO L134 CoverageAnalysis]: Checked inductivity of 3136 backedges. 0 proven. 3136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 11:27:23,736 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 11:27:23,736 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 58 [2019-12-07 11:27:23,736 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195342363] [2019-12-07 11:27:23,736 INFO L442 AbstractCegarLoop]: Interpolant automaton has 59 states [2019-12-07 11:27:23,736 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 11:27:23,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2019-12-07 11:27:23,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2019-12-07 11:27:23,738 INFO L87 Difference]: Start difference. First operand 118 states and 124 transitions. Second operand 59 states. [2019-12-07 11:27:23,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 11:27:23,891 INFO L93 Difference]: Finished difference Result 125 states and 133 transitions. [2019-12-07 11:27:23,891 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2019-12-07 11:27:23,891 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 117 [2019-12-07 11:27:23,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 11:27:23,892 INFO L225 Difference]: With dead ends: 125 [2019-12-07 11:27:23,892 INFO L226 Difference]: Without dead ends: 121 [2019-12-07 11:27:23,894 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2019-12-07 11:27:23,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2019-12-07 11:27:23,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 120. [2019-12-07 11:27:23,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2019-12-07 11:27:23,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 127 transitions. [2019-12-07 11:27:23,897 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 127 transitions. Word has length 117 [2019-12-07 11:27:23,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 11:27:23,897 INFO L462 AbstractCegarLoop]: Abstraction has 120 states and 127 transitions. [2019-12-07 11:27:23,897 INFO L463 AbstractCegarLoop]: Interpolant automaton has 59 states. [2019-12-07 11:27:23,897 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 127 transitions. [2019-12-07 11:27:23,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2019-12-07 11:27:23,898 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 11:27:23,898 INFO L410 BasicCegarLoop]: trace histogram [57, 50, 7, 1, 1, 1, 1, 1] [2019-12-07 11:27:24,098 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 11:27:24,099 INFO L410 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 11:27:24,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 11:27:24,099 INFO L82 PathProgramCache]: Analyzing trace with hash 657562887, now seen corresponding path program 17 times [2019-12-07 11:27:24,099 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 11:27:24,100 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030406940] [2019-12-07 11:27:24,100 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 11:27:24,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:27:25,171 INFO L134 CoverageAnalysis]: Checked inductivity of 3249 backedges. 0 proven. 3249 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 11:27:25,172 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030406940] [2019-12-07 11:27:25,172 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1369576793] [2019-12-07 11:27:25,172 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f6657297-4ce4-4132-bb97-61f5bb4b20d4/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 11:27:25,224 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 58 check-sat command(s) [2019-12-07 11:27:25,224 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 11:27:25,225 INFO L264 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 31 conjunts are in the unsatisfiable core [2019-12-07 11:27:25,226 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 11:27:26,025 INFO L134 CoverageAnalysis]: Checked inductivity of 3249 backedges. 1653 proven. 784 refuted. 0 times theorem prover too weak. 812 trivial. 0 not checked. [2019-12-07 11:27:26,026 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 11:27:26,026 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 31] total 81 [2019-12-07 11:27:26,026 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034553196] [2019-12-07 11:27:26,026 INFO L442 AbstractCegarLoop]: Interpolant automaton has 81 states [2019-12-07 11:27:26,026 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 11:27:26,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2019-12-07 11:27:26,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2019-12-07 11:27:26,028 INFO L87 Difference]: Start difference. First operand 120 states and 127 transitions. Second operand 81 states. [2019-12-07 11:27:26,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 11:27:26,271 INFO L93 Difference]: Finished difference Result 169 states and 220 transitions. [2019-12-07 11:27:26,272 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2019-12-07 11:27:26,272 INFO L78 Accepts]: Start accepts. Automaton has 81 states. Word has length 119 [2019-12-07 11:27:26,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 11:27:26,273 INFO L225 Difference]: With dead ends: 169 [2019-12-07 11:27:26,273 INFO L226 Difference]: Without dead ends: 165 [2019-12-07 11:27:26,275 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2019-12-07 11:27:26,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2019-12-07 11:27:26,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 164. [2019-12-07 11:27:26,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2019-12-07 11:27:26,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 193 transitions. [2019-12-07 11:27:26,280 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 193 transitions. Word has length 119 [2019-12-07 11:27:26,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 11:27:26,281 INFO L462 AbstractCegarLoop]: Abstraction has 164 states and 193 transitions. [2019-12-07 11:27:26,281 INFO L463 AbstractCegarLoop]: Interpolant automaton has 81 states. [2019-12-07 11:27:26,281 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 193 transitions. [2019-12-07 11:27:26,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2019-12-07 11:27:26,281 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 11:27:26,281 INFO L410 BasicCegarLoop]: trace histogram [79, 50, 29, 1, 1, 1, 1, 1] [2019-12-07 11:27:26,482 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 11:27:26,482 INFO L410 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 11:27:26,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 11:27:26,483 INFO L82 PathProgramCache]: Analyzing trace with hash 244345781, now seen corresponding path program 18 times [2019-12-07 11:27:26,483 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 11:27:26,483 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775966065] [2019-12-07 11:27:26,483 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 11:27:26,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:27:28,402 INFO L134 CoverageAnalysis]: Checked inductivity of 6241 backedges. 0 proven. 6241 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 11:27:28,402 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775966065] [2019-12-07 11:27:28,402 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [421955579] [2019-12-07 11:27:28,402 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f6657297-4ce4-4132-bb97-61f5bb4b20d4/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 11:27:28,487 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 79 check-sat command(s) [2019-12-07 11:27:28,488 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 11:27:28,489 INFO L264 TraceCheckSpWp]: Trace formula consists of 384 conjuncts, 41 conjunts are in the unsatisfiable core [2019-12-07 11:27:28,490 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 11:27:28,926 INFO L134 CoverageAnalysis]: Checked inductivity of 6241 backedges. 3157 proven. 1444 refuted. 0 times theorem prover too weak. 1640 trivial. 0 not checked. [2019-12-07 11:27:28,926 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 11:27:28,927 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 41] total 91 [2019-12-07 11:27:28,927 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900421508] [2019-12-07 11:27:28,927 INFO L442 AbstractCegarLoop]: Interpolant automaton has 91 states [2019-12-07 11:27:28,927 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 11:27:28,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2019-12-07 11:27:28,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4095, Invalid=4095, Unknown=0, NotChecked=0, Total=8190 [2019-12-07 11:27:28,929 INFO L87 Difference]: Start difference. First operand 164 states and 193 transitions. Second operand 91 states. [2019-12-07 11:27:29,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 11:27:29,280 INFO L93 Difference]: Finished difference Result 189 states and 238 transitions. [2019-12-07 11:27:29,280 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2019-12-07 11:27:29,281 INFO L78 Accepts]: Start accepts. Automaton has 91 states. Word has length 163 [2019-12-07 11:27:29,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 11:27:29,282 INFO L225 Difference]: With dead ends: 189 [2019-12-07 11:27:29,282 INFO L226 Difference]: Without dead ends: 185 [2019-12-07 11:27:29,283 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=4095, Invalid=4095, Unknown=0, NotChecked=0, Total=8190 [2019-12-07 11:27:29,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2019-12-07 11:27:29,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 184. [2019-12-07 11:27:29,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2019-12-07 11:27:29,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 223 transitions. [2019-12-07 11:27:29,289 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 223 transitions. Word has length 163 [2019-12-07 11:27:29,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 11:27:29,289 INFO L462 AbstractCegarLoop]: Abstraction has 184 states and 223 transitions. [2019-12-07 11:27:29,289 INFO L463 AbstractCegarLoop]: Interpolant automaton has 91 states. [2019-12-07 11:27:29,289 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 223 transitions. [2019-12-07 11:27:29,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2019-12-07 11:27:29,290 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 11:27:29,290 INFO L410 BasicCegarLoop]: trace histogram [89, 50, 39, 1, 1, 1, 1, 1] [2019-12-07 11:27:29,491 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 11:27:29,491 INFO L410 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 11:27:29,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 11:27:29,492 INFO L82 PathProgramCache]: Analyzing trace with hash 199000487, now seen corresponding path program 19 times [2019-12-07 11:27:29,492 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 11:27:29,492 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958157612] [2019-12-07 11:27:29,492 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 11:27:29,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:27:31,826 INFO L134 CoverageAnalysis]: Checked inductivity of 7921 backedges. 0 proven. 7921 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 11:27:31,826 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958157612] [2019-12-07 11:27:31,826 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1500061241] [2019-12-07 11:27:31,826 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f6657297-4ce4-4132-bb97-61f5bb4b20d4/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 11:27:31,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:27:31,870 INFO L264 TraceCheckSpWp]: Trace formula consists of 448 conjuncts, 91 conjunts are in the unsatisfiable core [2019-12-07 11:27:31,872 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 11:27:31,912 INFO L134 CoverageAnalysis]: Checked inductivity of 7921 backedges. 0 proven. 7921 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 11:27:31,913 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 11:27:31,913 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [91, 91] total 91 [2019-12-07 11:27:31,913 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908158120] [2019-12-07 11:27:31,913 INFO L442 AbstractCegarLoop]: Interpolant automaton has 92 states [2019-12-07 11:27:31,913 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 11:27:31,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2019-12-07 11:27:31,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4186, Invalid=4186, Unknown=0, NotChecked=0, Total=8372 [2019-12-07 11:27:31,914 INFO L87 Difference]: Start difference. First operand 184 states and 223 transitions. Second operand 92 states. [2019-12-07 11:27:32,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 11:27:32,453 INFO L93 Difference]: Finished difference Result 191 states and 232 transitions. [2019-12-07 11:27:32,454 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2019-12-07 11:27:32,454 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 183 [2019-12-07 11:27:32,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 11:27:32,455 INFO L225 Difference]: With dead ends: 191 [2019-12-07 11:27:32,455 INFO L226 Difference]: Without dead ends: 187 [2019-12-07 11:27:32,455 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 183 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=4186, Invalid=4186, Unknown=0, NotChecked=0, Total=8372 [2019-12-07 11:27:32,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2019-12-07 11:27:32,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 186. [2019-12-07 11:27:32,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2019-12-07 11:27:32,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 226 transitions. [2019-12-07 11:27:32,459 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 226 transitions. Word has length 183 [2019-12-07 11:27:32,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 11:27:32,459 INFO L462 AbstractCegarLoop]: Abstraction has 186 states and 226 transitions. [2019-12-07 11:27:32,459 INFO L463 AbstractCegarLoop]: Interpolant automaton has 92 states. [2019-12-07 11:27:32,459 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 226 transitions. [2019-12-07 11:27:32,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2019-12-07 11:27:32,460 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 11:27:32,460 INFO L410 BasicCegarLoop]: trace histogram [90, 50, 40, 1, 1, 1, 1, 1] [2019-12-07 11:27:32,660 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 11:27:32,660 INFO L410 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 11:27:32,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 11:27:32,661 INFO L82 PathProgramCache]: Analyzing trace with hash -1981870548, now seen corresponding path program 20 times [2019-12-07 11:27:32,661 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 11:27:32,661 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336970176] [2019-12-07 11:27:32,661 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 11:27:32,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:27:35,065 INFO L134 CoverageAnalysis]: Checked inductivity of 8100 backedges. 0 proven. 8100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 11:27:35,065 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336970176] [2019-12-07 11:27:35,065 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1980317584] [2019-12-07 11:27:35,065 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f6657297-4ce4-4132-bb97-61f5bb4b20d4/bin/uautomizer/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 11:27:35,113 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-07 11:27:35,113 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 11:27:35,115 INFO L264 TraceCheckSpWp]: Trace formula consists of 454 conjuncts, 92 conjunts are in the unsatisfiable core [2019-12-07 11:27:35,117 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 11:27:35,152 INFO L134 CoverageAnalysis]: Checked inductivity of 8100 backedges. 0 proven. 8100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 11:27:35,153 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 11:27:35,153 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [92, 92] total 92 [2019-12-07 11:27:35,153 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098632020] [2019-12-07 11:27:35,153 INFO L442 AbstractCegarLoop]: Interpolant automaton has 93 states [2019-12-07 11:27:35,154 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 11:27:35,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2019-12-07 11:27:35,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4278, Invalid=4278, Unknown=0, NotChecked=0, Total=8556 [2019-12-07 11:27:35,154 INFO L87 Difference]: Start difference. First operand 186 states and 226 transitions. Second operand 93 states. [2019-12-07 11:27:35,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 11:27:35,607 INFO L93 Difference]: Finished difference Result 193 states and 235 transitions. [2019-12-07 11:27:35,607 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2019-12-07 11:27:35,607 INFO L78 Accepts]: Start accepts. Automaton has 93 states. Word has length 185 [2019-12-07 11:27:35,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 11:27:35,608 INFO L225 Difference]: With dead ends: 193 [2019-12-07 11:27:35,608 INFO L226 Difference]: Without dead ends: 189 [2019-12-07 11:27:35,609 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=4278, Invalid=4278, Unknown=0, NotChecked=0, Total=8556 [2019-12-07 11:27:35,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2019-12-07 11:27:35,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 188. [2019-12-07 11:27:35,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 188 states. [2019-12-07 11:27:35,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 229 transitions. [2019-12-07 11:27:35,613 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 229 transitions. Word has length 185 [2019-12-07 11:27:35,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 11:27:35,613 INFO L462 AbstractCegarLoop]: Abstraction has 188 states and 229 transitions. [2019-12-07 11:27:35,613 INFO L463 AbstractCegarLoop]: Interpolant automaton has 93 states. [2019-12-07 11:27:35,613 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 229 transitions. [2019-12-07 11:27:35,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2019-12-07 11:27:35,614 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 11:27:35,614 INFO L410 BasicCegarLoop]: trace histogram [91, 50, 41, 1, 1, 1, 1, 1] [2019-12-07 11:27:35,814 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 11:27:35,815 INFO L410 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 11:27:35,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 11:27:35,815 INFO L82 PathProgramCache]: Analyzing trace with hash -1854894735, now seen corresponding path program 21 times [2019-12-07 11:27:35,816 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 11:27:35,816 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651661646] [2019-12-07 11:27:35,816 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 11:27:35,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:27:38,309 INFO L134 CoverageAnalysis]: Checked inductivity of 8281 backedges. 0 proven. 8281 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 11:27:38,309 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651661646] [2019-12-07 11:27:38,310 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [111450031] [2019-12-07 11:27:38,310 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f6657297-4ce4-4132-bb97-61f5bb4b20d4/bin/uautomizer/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 11:27:38,411 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 84 check-sat command(s) [2019-12-07 11:27:38,411 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 11:27:38,412 INFO L264 TraceCheckSpWp]: Trace formula consists of 428 conjuncts, 44 conjunts are in the unsatisfiable core [2019-12-07 11:27:38,414 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 11:27:38,438 INFO L134 CoverageAnalysis]: Checked inductivity of 8281 backedges. 4150 proven. 1681 refuted. 0 times theorem prover too weak. 2450 trivial. 0 not checked. [2019-12-07 11:27:38,439 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 11:27:38,439 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [93, 44] total 94 [2019-12-07 11:27:38,439 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292537800] [2019-12-07 11:27:38,440 INFO L442 AbstractCegarLoop]: Interpolant automaton has 94 states [2019-12-07 11:27:38,440 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 11:27:38,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2019-12-07 11:27:38,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4371, Invalid=4371, Unknown=0, NotChecked=0, Total=8742 [2019-12-07 11:27:38,441 INFO L87 Difference]: Start difference. First operand 188 states and 229 transitions. Second operand 94 states. [2019-12-07 11:27:39,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 11:27:39,015 INFO L93 Difference]: Finished difference Result 195 states and 238 transitions. [2019-12-07 11:27:39,016 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2019-12-07 11:27:39,016 INFO L78 Accepts]: Start accepts. Automaton has 94 states. Word has length 187 [2019-12-07 11:27:39,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 11:27:39,018 INFO L225 Difference]: With dead ends: 195 [2019-12-07 11:27:39,019 INFO L226 Difference]: Without dead ends: 191 [2019-12-07 11:27:39,020 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 187 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=4371, Invalid=4371, Unknown=0, NotChecked=0, Total=8742 [2019-12-07 11:27:39,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2019-12-07 11:27:39,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 190. [2019-12-07 11:27:39,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 190 states. [2019-12-07 11:27:39,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 232 transitions. [2019-12-07 11:27:39,030 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 232 transitions. Word has length 187 [2019-12-07 11:27:39,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 11:27:39,030 INFO L462 AbstractCegarLoop]: Abstraction has 190 states and 232 transitions. [2019-12-07 11:27:39,030 INFO L463 AbstractCegarLoop]: Interpolant automaton has 94 states. [2019-12-07 11:27:39,030 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 232 transitions. [2019-12-07 11:27:39,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2019-12-07 11:27:39,031 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 11:27:39,032 INFO L410 BasicCegarLoop]: trace histogram [92, 50, 42, 1, 1, 1, 1, 1] [2019-12-07 11:27:39,232 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 11:27:39,232 INFO L410 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 11:27:39,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 11:27:39,232 INFO L82 PathProgramCache]: Analyzing trace with hash -90222730, now seen corresponding path program 22 times [2019-12-07 11:27:39,233 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 11:27:39,233 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949181095] [2019-12-07 11:27:39,233 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 11:27:39,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:27:41,735 INFO L134 CoverageAnalysis]: Checked inductivity of 8464 backedges. 0 proven. 8464 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 11:27:41,735 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949181095] [2019-12-07 11:27:41,735 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1207849798] [2019-12-07 11:27:41,735 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f6657297-4ce4-4132-bb97-61f5bb4b20d4/bin/uautomizer/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 11:27:41,780 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-07 11:27:41,780 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 11:27:41,783 INFO L264 TraceCheckSpWp]: Trace formula consists of 466 conjuncts, 94 conjunts are in the unsatisfiable core [2019-12-07 11:27:41,784 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 11:27:41,820 INFO L134 CoverageAnalysis]: Checked inductivity of 8464 backedges. 0 proven. 8464 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 11:27:41,820 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 11:27:41,821 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [94, 94] total 94 [2019-12-07 11:27:41,821 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489549516] [2019-12-07 11:27:41,821 INFO L442 AbstractCegarLoop]: Interpolant automaton has 95 states [2019-12-07 11:27:41,821 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 11:27:41,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2019-12-07 11:27:41,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4465, Invalid=4465, Unknown=0, NotChecked=0, Total=8930 [2019-12-07 11:27:41,822 INFO L87 Difference]: Start difference. First operand 190 states and 232 transitions. Second operand 95 states. [2019-12-07 11:27:42,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 11:27:42,315 INFO L93 Difference]: Finished difference Result 197 states and 241 transitions. [2019-12-07 11:27:42,315 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2019-12-07 11:27:42,315 INFO L78 Accepts]: Start accepts. Automaton has 95 states. Word has length 189 [2019-12-07 11:27:42,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 11:27:42,316 INFO L225 Difference]: With dead ends: 197 [2019-12-07 11:27:42,316 INFO L226 Difference]: Without dead ends: 193 [2019-12-07 11:27:42,316 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 189 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=4465, Invalid=4465, Unknown=0, NotChecked=0, Total=8930 [2019-12-07 11:27:42,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2019-12-07 11:27:42,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 192. [2019-12-07 11:27:42,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192 states. [2019-12-07 11:27:42,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 235 transitions. [2019-12-07 11:27:42,320 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 235 transitions. Word has length 189 [2019-12-07 11:27:42,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 11:27:42,320 INFO L462 AbstractCegarLoop]: Abstraction has 192 states and 235 transitions. [2019-12-07 11:27:42,320 INFO L463 AbstractCegarLoop]: Interpolant automaton has 95 states. [2019-12-07 11:27:42,320 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 235 transitions. [2019-12-07 11:27:42,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2019-12-07 11:27:42,321 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 11:27:42,321 INFO L410 BasicCegarLoop]: trace histogram [93, 50, 43, 1, 1, 1, 1, 1] [2019-12-07 11:27:42,521 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 11:27:42,521 INFO L410 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 11:27:42,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 11:27:42,522 INFO L82 PathProgramCache]: Analyzing trace with hash -752507845, now seen corresponding path program 23 times [2019-12-07 11:27:42,522 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 11:27:42,522 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013854704] [2019-12-07 11:27:42,522 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 11:27:42,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:27:45,004 INFO L134 CoverageAnalysis]: Checked inductivity of 8649 backedges. 0 proven. 8649 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 11:27:45,004 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013854704] [2019-12-07 11:27:45,004 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1084864224] [2019-12-07 11:27:45,005 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f6657297-4ce4-4132-bb97-61f5bb4b20d4/bin/uautomizer/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 11:27:45,119 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 94 check-sat command(s) [2019-12-07 11:27:45,119 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 11:27:45,121 INFO L264 TraceCheckSpWp]: Trace formula consists of 472 conjuncts, 49 conjunts are in the unsatisfiable core [2019-12-07 11:27:45,122 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 11:27:45,301 INFO L134 CoverageAnalysis]: Checked inductivity of 8649 backedges. 4371 proven. 2116 refuted. 0 times theorem prover too weak. 2162 trivial. 0 not checked. [2019-12-07 11:27:45,301 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 11:27:45,301 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 49] total 99 [2019-12-07 11:27:45,301 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343482940] [2019-12-07 11:27:45,302 INFO L442 AbstractCegarLoop]: Interpolant automaton has 99 states [2019-12-07 11:27:45,302 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 11:27:45,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2019-12-07 11:27:45,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4851, Invalid=4851, Unknown=0, NotChecked=0, Total=9702 [2019-12-07 11:27:45,303 INFO L87 Difference]: Start difference. First operand 192 states and 235 transitions. Second operand 99 states. [2019-12-07 11:27:45,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 11:27:45,764 INFO L93 Difference]: Finished difference Result 205 states and 256 transitions. [2019-12-07 11:27:45,764 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2019-12-07 11:27:45,764 INFO L78 Accepts]: Start accepts. Automaton has 99 states. Word has length 191 [2019-12-07 11:27:45,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 11:27:45,765 INFO L225 Difference]: With dead ends: 205 [2019-12-07 11:27:45,765 INFO L226 Difference]: Without dead ends: 201 [2019-12-07 11:27:45,766 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 285 GetRequests, 188 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=4851, Invalid=4851, Unknown=0, NotChecked=0, Total=9702 [2019-12-07 11:27:45,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2019-12-07 11:27:45,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 200. [2019-12-07 11:27:45,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2019-12-07 11:27:45,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 247 transitions. [2019-12-07 11:27:45,770 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 247 transitions. Word has length 191 [2019-12-07 11:27:45,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 11:27:45,770 INFO L462 AbstractCegarLoop]: Abstraction has 200 states and 247 transitions. [2019-12-07 11:27:45,770 INFO L463 AbstractCegarLoop]: Interpolant automaton has 99 states. [2019-12-07 11:27:45,770 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 247 transitions. [2019-12-07 11:27:45,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2019-12-07 11:27:45,771 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 11:27:45,771 INFO L410 BasicCegarLoop]: trace histogram [97, 50, 47, 1, 1, 1, 1, 1] [2019-12-07 11:27:45,971 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 11:27:45,971 INFO L410 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 11:27:45,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 11:27:45,972 INFO L82 PathProgramCache]: Analyzing trace with hash 264041167, now seen corresponding path program 24 times [2019-12-07 11:27:45,972 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 11:27:45,972 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709467306] [2019-12-07 11:27:45,972 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 11:27:46,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:27:48,716 INFO L134 CoverageAnalysis]: Checked inductivity of 9409 backedges. 0 proven. 9409 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 11:27:48,716 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709467306] [2019-12-07 11:27:48,716 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1174174391] [2019-12-07 11:27:48,716 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f6657297-4ce4-4132-bb97-61f5bb4b20d4/bin/uautomizer/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 11:27:48,837 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 98 check-sat command(s) [2019-12-07 11:27:48,837 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 11:27:48,839 INFO L264 TraceCheckSpWp]: Trace formula consists of 496 conjuncts, 99 conjunts are in the unsatisfiable core [2019-12-07 11:27:48,841 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 11:27:48,879 INFO L134 CoverageAnalysis]: Checked inductivity of 9409 backedges. 0 proven. 9409 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 11:27:48,879 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 11:27:48,880 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [99, 99] total 99 [2019-12-07 11:27:48,880 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681086720] [2019-12-07 11:27:48,880 INFO L442 AbstractCegarLoop]: Interpolant automaton has 100 states [2019-12-07 11:27:48,880 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 11:27:48,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2019-12-07 11:27:48,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4950, Invalid=4950, Unknown=0, NotChecked=0, Total=9900 [2019-12-07 11:27:48,881 INFO L87 Difference]: Start difference. First operand 200 states and 247 transitions. Second operand 100 states. [2019-12-07 11:27:49,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 11:27:49,377 INFO L93 Difference]: Finished difference Result 207 states and 256 transitions. [2019-12-07 11:27:49,377 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2019-12-07 11:27:49,377 INFO L78 Accepts]: Start accepts. Automaton has 100 states. Word has length 199 [2019-12-07 11:27:49,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 11:27:49,378 INFO L225 Difference]: With dead ends: 207 [2019-12-07 11:27:49,378 INFO L226 Difference]: Without dead ends: 203 [2019-12-07 11:27:49,379 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 297 GetRequests, 199 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=4950, Invalid=4950, Unknown=0, NotChecked=0, Total=9900 [2019-12-07 11:27:49,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2019-12-07 11:27:49,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 202. [2019-12-07 11:27:49,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 202 states. [2019-12-07 11:27:49,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 250 transitions. [2019-12-07 11:27:49,383 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 250 transitions. Word has length 199 [2019-12-07 11:27:49,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 11:27:49,383 INFO L462 AbstractCegarLoop]: Abstraction has 202 states and 250 transitions. [2019-12-07 11:27:49,383 INFO L463 AbstractCegarLoop]: Interpolant automaton has 100 states. [2019-12-07 11:27:49,383 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 250 transitions. [2019-12-07 11:27:49,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2019-12-07 11:27:49,383 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 11:27:49,384 INFO L410 BasicCegarLoop]: trace histogram [98, 50, 48, 1, 1, 1, 1, 1] [2019-12-07 11:27:49,584 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 11:27:49,584 INFO L410 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 11:27:49,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 11:27:49,585 INFO L82 PathProgramCache]: Analyzing trace with hash 392680788, now seen corresponding path program 25 times [2019-12-07 11:27:49,585 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 11:27:49,585 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235965869] [2019-12-07 11:27:49,585 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 11:27:49,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:27:52,338 INFO L134 CoverageAnalysis]: Checked inductivity of 9604 backedges. 0 proven. 9604 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 11:27:52,338 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235965869] [2019-12-07 11:27:52,338 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1791627481] [2019-12-07 11:27:52,338 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f6657297-4ce4-4132-bb97-61f5bb4b20d4/bin/uautomizer/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 11:27:52,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:27:52,387 INFO L264 TraceCheckSpWp]: Trace formula consists of 502 conjuncts, 100 conjunts are in the unsatisfiable core [2019-12-07 11:27:52,389 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 11:27:52,428 INFO L134 CoverageAnalysis]: Checked inductivity of 9604 backedges. 0 proven. 9604 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 11:27:52,428 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 11:27:52,428 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [100, 100] total 100 [2019-12-07 11:27:52,428 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923493447] [2019-12-07 11:27:52,429 INFO L442 AbstractCegarLoop]: Interpolant automaton has 101 states [2019-12-07 11:27:52,429 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 11:27:52,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2019-12-07 11:27:52,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5050, Invalid=5050, Unknown=0, NotChecked=0, Total=10100 [2019-12-07 11:27:52,429 INFO L87 Difference]: Start difference. First operand 202 states and 250 transitions. Second operand 101 states. [2019-12-07 11:27:53,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 11:27:53,053 INFO L93 Difference]: Finished difference Result 209 states and 259 transitions. [2019-12-07 11:27:53,053 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2019-12-07 11:27:53,053 INFO L78 Accepts]: Start accepts. Automaton has 101 states. Word has length 201 [2019-12-07 11:27:53,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 11:27:53,055 INFO L225 Difference]: With dead ends: 209 [2019-12-07 11:27:53,055 INFO L226 Difference]: Without dead ends: 205 [2019-12-07 11:27:53,056 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 300 GetRequests, 201 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=5050, Invalid=5050, Unknown=0, NotChecked=0, Total=10100 [2019-12-07 11:27:53,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2019-12-07 11:27:53,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 204. [2019-12-07 11:27:53,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204 states. [2019-12-07 11:27:53,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 253 transitions. [2019-12-07 11:27:53,061 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 253 transitions. Word has length 201 [2019-12-07 11:27:53,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 11:27:53,061 INFO L462 AbstractCegarLoop]: Abstraction has 204 states and 253 transitions. [2019-12-07 11:27:53,061 INFO L463 AbstractCegarLoop]: Interpolant automaton has 101 states. [2019-12-07 11:27:53,062 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 253 transitions. [2019-12-07 11:27:53,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2019-12-07 11:27:53,062 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 11:27:53,063 INFO L410 BasicCegarLoop]: trace histogram [99, 50, 49, 1, 1, 1, 1, 1] [2019-12-07 11:27:53,263 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 11:27:53,263 INFO L410 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 11:27:53,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 11:27:53,263 INFO L82 PathProgramCache]: Analyzing trace with hash -538695015, now seen corresponding path program 26 times [2019-12-07 11:27:53,263 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 11:27:53,264 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455046232] [2019-12-07 11:27:53,264 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 11:27:53,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:27:56,121 INFO L134 CoverageAnalysis]: Checked inductivity of 9801 backedges. 0 proven. 9801 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 11:27:56,121 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455046232] [2019-12-07 11:27:56,121 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [763866791] [2019-12-07 11:27:56,121 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f6657297-4ce4-4132-bb97-61f5bb4b20d4/bin/uautomizer/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 11:27:56,168 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-07 11:27:56,168 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 11:27:56,170 INFO L264 TraceCheckSpWp]: Trace formula consists of 508 conjuncts, 101 conjunts are in the unsatisfiable core [2019-12-07 11:27:56,172 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 11:27:56,211 INFO L134 CoverageAnalysis]: Checked inductivity of 9801 backedges. 0 proven. 9801 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 11:27:56,211 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 11:27:56,212 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 101] total 101 [2019-12-07 11:27:56,212 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049999450] [2019-12-07 11:27:56,212 INFO L442 AbstractCegarLoop]: Interpolant automaton has 102 states [2019-12-07 11:27:56,212 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 11:27:56,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2019-12-07 11:27:56,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2019-12-07 11:27:56,213 INFO L87 Difference]: Start difference. First operand 204 states and 253 transitions. Second operand 102 states. [2019-12-07 11:27:56,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 11:27:56,840 INFO L93 Difference]: Finished difference Result 210 states and 260 transitions. [2019-12-07 11:27:56,840 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2019-12-07 11:27:56,840 INFO L78 Accepts]: Start accepts. Automaton has 102 states. Word has length 203 [2019-12-07 11:27:56,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 11:27:56,841 INFO L225 Difference]: With dead ends: 210 [2019-12-07 11:27:56,842 INFO L226 Difference]: Without dead ends: 206 [2019-12-07 11:27:56,842 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 303 GetRequests, 203 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2019-12-07 11:27:56,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2019-12-07 11:27:56,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 206. [2019-12-07 11:27:56,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 206 states. [2019-12-07 11:27:56,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 256 transitions. [2019-12-07 11:27:56,853 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 256 transitions. Word has length 203 [2019-12-07 11:27:56,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 11:27:56,853 INFO L462 AbstractCegarLoop]: Abstraction has 206 states and 256 transitions. [2019-12-07 11:27:56,853 INFO L463 AbstractCegarLoop]: Interpolant automaton has 102 states. [2019-12-07 11:27:56,853 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 256 transitions. [2019-12-07 11:27:56,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2019-12-07 11:27:56,854 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 11:27:56,854 INFO L410 BasicCegarLoop]: trace histogram [100, 50, 50, 1, 1, 1, 1, 1] [2019-12-07 11:27:57,055 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 11:27:57,055 INFO L410 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 11:27:57,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 11:27:57,056 INFO L82 PathProgramCache]: Analyzing trace with hash 2057323166, now seen corresponding path program 27 times [2019-12-07 11:27:57,056 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 11:27:57,056 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396213685] [2019-12-07 11:27:57,056 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 11:27:57,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:27:58,299 INFO L134 CoverageAnalysis]: Checked inductivity of 10000 backedges. 0 proven. 7450 refuted. 0 times theorem prover too weak. 2550 trivial. 0 not checked. [2019-12-07 11:27:58,299 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396213685] [2019-12-07 11:27:58,300 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1870122731] [2019-12-07 11:27:58,300 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f6657297-4ce4-4132-bb97-61f5bb4b20d4/bin/uautomizer/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 11:27:58,448 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 100 check-sat command(s) [2019-12-07 11:27:58,449 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 11:27:58,451 INFO L264 TraceCheckSpWp]: Trace formula consists of 510 conjuncts, 108 conjunts are in the unsatisfiable core [2019-12-07 11:27:58,453 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 11:27:58,478 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 11:27:58,587 INFO L134 CoverageAnalysis]: Checked inductivity of 10000 backedges. 0 proven. 7450 refuted. 0 times theorem prover too weak. 2550 trivial. 0 not checked. [2019-12-07 11:27:58,587 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 11:27:58,587 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 54 [2019-12-07 11:27:58,587 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856045484] [2019-12-07 11:27:58,588 INFO L442 AbstractCegarLoop]: Interpolant automaton has 55 states [2019-12-07 11:27:58,588 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 11:27:58,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2019-12-07 11:27:58,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=2862, Unknown=0, NotChecked=0, Total=2970 [2019-12-07 11:27:58,591 INFO L87 Difference]: Start difference. First operand 206 states and 256 transitions. Second operand 55 states. [2019-12-07 11:27:59,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 11:27:59,636 INFO L93 Difference]: Finished difference Result 2861 states and 4236 transitions. [2019-12-07 11:27:59,636 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2019-12-07 11:27:59,636 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 205 [2019-12-07 11:27:59,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 11:27:59,646 INFO L225 Difference]: With dead ends: 2861 [2019-12-07 11:27:59,646 INFO L226 Difference]: Without dead ends: 2857 [2019-12-07 11:27:59,647 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 203 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=113, Invalid=2967, Unknown=0, NotChecked=0, Total=3080 [2019-12-07 11:27:59,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2857 states. [2019-12-07 11:27:59,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2857 to 208. [2019-12-07 11:27:59,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 208 states. [2019-12-07 11:27:59,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 259 transitions. [2019-12-07 11:27:59,676 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 259 transitions. Word has length 205 [2019-12-07 11:27:59,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 11:27:59,676 INFO L462 AbstractCegarLoop]: Abstraction has 208 states and 259 transitions. [2019-12-07 11:27:59,676 INFO L463 AbstractCegarLoop]: Interpolant automaton has 55 states. [2019-12-07 11:27:59,676 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 259 transitions. [2019-12-07 11:27:59,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2019-12-07 11:27:59,677 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 11:27:59,677 INFO L410 BasicCegarLoop]: trace histogram [101, 51, 50, 1, 1, 1, 1, 1] [2019-12-07 11:27:59,877 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 11:27:59,878 INFO L410 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 11:27:59,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 11:27:59,878 INFO L82 PathProgramCache]: Analyzing trace with hash 1454796131, now seen corresponding path program 28 times [2019-12-07 11:27:59,878 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 11:27:59,879 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099020552] [2019-12-07 11:27:59,879 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 11:27:59,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:28:00,711 INFO L134 CoverageAnalysis]: Checked inductivity of 10201 backedges. 7651 proven. 0 refuted. 0 times theorem prover too weak. 2550 trivial. 0 not checked. [2019-12-07 11:28:00,711 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099020552] [2019-12-07 11:28:00,711 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 11:28:00,712 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [52] imperfect sequences [] total 52 [2019-12-07 11:28:00,712 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456518585] [2019-12-07 11:28:00,712 INFO L442 AbstractCegarLoop]: Interpolant automaton has 52 states [2019-12-07 11:28:00,712 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 11:28:00,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2019-12-07 11:28:00,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2019-12-07 11:28:00,713 INFO L87 Difference]: Start difference. First operand 208 states and 259 transitions. Second operand 52 states. [2019-12-07 11:28:00,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 11:28:00,849 INFO L93 Difference]: Finished difference Result 307 states and 407 transitions. [2019-12-07 11:28:00,850 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2019-12-07 11:28:00,850 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 207 [2019-12-07 11:28:00,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 11:28:00,850 INFO L225 Difference]: With dead ends: 307 [2019-12-07 11:28:00,850 INFO L226 Difference]: Without dead ends: 0 [2019-12-07 11:28:00,851 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2019-12-07 11:28:00,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-12-07 11:28:00,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-12-07 11:28:00,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-12-07 11:28:00,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-12-07 11:28:00,851 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 207 [2019-12-07 11:28:00,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 11:28:00,852 INFO L462 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-12-07 11:28:00,852 INFO L463 AbstractCegarLoop]: Interpolant automaton has 52 states. [2019-12-07 11:28:00,852 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-12-07 11:28:00,852 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-12-07 11:28:00,853 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2019-12-07 11:28:01,285 WARN L192 SmtUtils]: Spent 423.00 ms on a formula simplification. DAG size of input: 1832 DAG size of output: 407 [2019-12-07 11:28:02,303 WARN L192 SmtUtils]: Spent 1.01 s on a formula simplification. DAG size of input: 407 DAG size of output: 357 [2019-12-07 11:28:02,307 INFO L246 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2019-12-07 11:28:02,307 INFO L246 CegarLoopResult]: For program point L13-2(lines 13 20) no Hoare annotation was computed. [2019-12-07 11:28:02,307 INFO L246 CegarLoopResult]: For program point L5(line 5) no Hoare annotation was computed. [2019-12-07 11:28:02,307 INFO L246 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2019-12-07 11:28:02,307 INFO L246 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2019-12-07 11:28:02,307 INFO L246 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 5) no Hoare annotation was computed. [2019-12-07 11:28:02,308 INFO L249 CegarLoopResult]: At program point L22(lines 10 23) the Hoare annotation is: true [2019-12-07 11:28:02,308 INFO L246 CegarLoopResult]: For program point L14(lines 14 19) no Hoare annotation was computed. [2019-12-07 11:28:02,309 INFO L242 CegarLoopResult]: At program point L14-2(lines 13 20) the Hoare annotation is: (or (and (<= ULTIMATE.start_main_~y~0 84) (<= 84 ULTIMATE.start_main_~x~0) (<= 84 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~x~0 84)) (and (<= ULTIMATE.start_main_~y~0 79) (<= 79 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~x~0 79) (<= 79 ULTIMATE.start_main_~x~0)) (and (<= ULTIMATE.start_main_~y~0 70) (<= ULTIMATE.start_main_~x~0 70) (<= 70 ULTIMATE.start_main_~x~0) (<= 70 ULTIMATE.start_main_~y~0)) (and (<= ULTIMATE.start_main_~y~0 96) (<= 96 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~x~0 96) (<= 96 ULTIMATE.start_main_~x~0)) (and (<= ULTIMATE.start_main_~y~0 99) (<= 99 ULTIMATE.start_main_~x~0) (<= 99 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~x~0 99)) (and (<= 62 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~x~0 62) (<= ULTIMATE.start_main_~y~0 62) (<= 62 ULTIMATE.start_main_~y~0)) (and (<= ULTIMATE.start_main_~y~0 72) (<= 72 ULTIMATE.start_main_~y~0) (<= 72 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~x~0 72)) (and (<= ULTIMATE.start_main_~x~0 77) (<= 77 ULTIMATE.start_main_~x~0) (<= 77 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~y~0 77)) (and (<= 55 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~y~0 55) (<= 55 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~x~0 55)) (and (<= ULTIMATE.start_main_~x~0 53) (<= ULTIMATE.start_main_~y~0 53) (<= 53 ULTIMATE.start_main_~x~0) (<= 53 ULTIMATE.start_main_~y~0)) (and (<= ULTIMATE.start_main_~x~0 51) (<= ULTIMATE.start_main_~y~0 51) (<= 51 ULTIMATE.start_main_~y~0) (<= 51 ULTIMATE.start_main_~x~0)) (and (<= ULTIMATE.start_main_~y~0 91) (<= 91 ULTIMATE.start_main_~x~0) (<= 91 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~x~0 91)) (and (<= 61 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~x~0 61) (<= ULTIMATE.start_main_~y~0 61) (<= 61 ULTIMATE.start_main_~x~0)) (and (<= ULTIMATE.start_main_~x~0 83) (<= ULTIMATE.start_main_~y~0 83) (<= 83 ULTIMATE.start_main_~x~0) (<= 83 ULTIMATE.start_main_~y~0)) (and (<= ULTIMATE.start_main_~x~0 60) (<= ULTIMATE.start_main_~y~0 60) (<= 60 ULTIMATE.start_main_~x~0) (<= 60 ULTIMATE.start_main_~y~0)) (and (<= 68 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~x~0 68) (<= 68 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~y~0 68)) (and (<= ULTIMATE.start_main_~y~0 88) (<= ULTIMATE.start_main_~x~0 88) (<= 88 ULTIMATE.start_main_~x~0) (<= 88 ULTIMATE.start_main_~y~0)) (and (<= ULTIMATE.start_main_~y~0 56) (<= 56 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~x~0 56) (<= 56 ULTIMATE.start_main_~y~0)) (and (<= ULTIMATE.start_main_~y~0 58) (<= ULTIMATE.start_main_~x~0 58) (<= 58 ULTIMATE.start_main_~y~0) (<= 58 ULTIMATE.start_main_~x~0)) (and (<= ULTIMATE.start_main_~x~0 57) (<= ULTIMATE.start_main_~y~0 57) (<= 57 ULTIMATE.start_main_~y~0) (<= 57 ULTIMATE.start_main_~x~0)) (and (<= ULTIMATE.start_main_~x~0 94) (<= ULTIMATE.start_main_~y~0 94) (<= 94 ULTIMATE.start_main_~x~0) (<= 94 ULTIMATE.start_main_~y~0)) (and (<= ULTIMATE.start_main_~y~0 81) (<= ULTIMATE.start_main_~x~0 81) (<= 81 ULTIMATE.start_main_~x~0) (<= 81 ULTIMATE.start_main_~y~0)) (and (<= 76 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~x~0 76) (<= ULTIMATE.start_main_~y~0 76) (<= 76 ULTIMATE.start_main_~x~0)) (and (<= 95 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~y~0 95) (<= ULTIMATE.start_main_~x~0 95) (<= 95 ULTIMATE.start_main_~x~0)) (and (<= 64 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~x~0 64) (<= ULTIMATE.start_main_~y~0 64) (<= 64 ULTIMATE.start_main_~x~0)) (and (<= 93 ULTIMATE.start_main_~x~0) (<= 93 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~x~0 93) (<= ULTIMATE.start_main_~y~0 93)) (and (<= 82 ULTIMATE.start_main_~x~0) (<= 82 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~y~0 82) (<= ULTIMATE.start_main_~x~0 82)) (and (<= ULTIMATE.start_main_~x~0 50) (<= ULTIMATE.start_main_~y~0 50) (<= 50 ULTIMATE.start_main_~y~0)) (and (<= 63 ULTIMATE.start_main_~x~0) (<= 63 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~y~0 63) (<= ULTIMATE.start_main_~x~0 63)) (and (<= 59 ULTIMATE.start_main_~x~0) (<= 59 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~y~0 59) (<= ULTIMATE.start_main_~x~0 59)) (and (<= 73 ULTIMATE.start_main_~x~0) (<= 73 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~y~0 73) (<= ULTIMATE.start_main_~x~0 73)) (and (<= ULTIMATE.start_main_~y~0 54) (<= 54 ULTIMATE.start_main_~y~0) (<= 54 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~x~0 54)) (and (<= 87 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~x~0 87) (<= 87 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~y~0 87)) (and (<= ULTIMATE.start_main_~x~0 90) (<= 90 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~y~0 90) (<= 90 ULTIMATE.start_main_~y~0)) (and (<= ULTIMATE.start_main_~y~0 85) (<= 85 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~x~0 85) (<= 85 ULTIMATE.start_main_~x~0)) (and (<= ULTIMATE.start_main_~y~0 65) (<= ULTIMATE.start_main_~x~0 65) (<= 65 ULTIMATE.start_main_~y~0) (<= 65 ULTIMATE.start_main_~x~0)) (and (<= 100 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~y~0 100) (<= 100 ULTIMATE.start_main_~x~0)) (and (<= ULTIMATE.start_main_~y~0 69) (<= 69 ULTIMATE.start_main_~y~0) (<= 69 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~x~0 69)) (and (<= 86 ULTIMATE.start_main_~x~0) (<= 86 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~x~0 86) (<= ULTIMATE.start_main_~y~0 86)) (and (<= ULTIMATE.start_main_~y~0 52) (<= 52 ULTIMATE.start_main_~x~0) (<= 52 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~x~0 52)) (and (<= 89 ULTIMATE.start_main_~x~0) (<= 89 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~x~0 89) (<= ULTIMATE.start_main_~y~0 89)) (and (<= ULTIMATE.start_main_~x~0 78) (<= 78 ULTIMATE.start_main_~y~0) (<= 78 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~y~0 78)) (and (<= ULTIMATE.start_main_~y~0 75) (<= 75 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~x~0 75) (<= 75 ULTIMATE.start_main_~y~0)) (and (<= 80 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~x~0 80) (<= 80 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~y~0 80)) (and (<= 97 ULTIMATE.start_main_~y~0) (<= 97 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~x~0 97) (<= ULTIMATE.start_main_~y~0 97)) (and (<= ULTIMATE.start_main_~y~0 71) (<= 71 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~x~0 71) (<= 71 ULTIMATE.start_main_~y~0)) (and (<= 66 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~y~0 66) (<= ULTIMATE.start_main_~x~0 66) (<= 66 ULTIMATE.start_main_~y~0)) (and (<= ULTIMATE.start_main_~y~0 92) (<= ULTIMATE.start_main_~x~0 92) (<= 92 ULTIMATE.start_main_~x~0) (<= 92 ULTIMATE.start_main_~y~0)) (and (<= ULTIMATE.start_main_~y~0 98) (<= 98 ULTIMATE.start_main_~y~0) (<= 98 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~x~0 98)) (and (<= 67 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~x~0 67) (<= 67 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~y~0 67)) (and (<= ULTIMATE.start_main_~x~0 74) (<= 74 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~y~0 74) (<= 74 ULTIMATE.start_main_~x~0))) [2019-12-07 11:28:02,309 INFO L246 CegarLoopResult]: For program point L4(lines 4 6) no Hoare annotation was computed. [2019-12-07 11:28:02,309 INFO L249 CegarLoopResult]: At program point L4-2(lines 3 8) the Hoare annotation is: true [2019-12-07 11:28:02,342 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.12 11:28:02 BoogieIcfgContainer [2019-12-07 11:28:02,342 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-12-07 11:28:02,342 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-12-07 11:28:02,342 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-12-07 11:28:02,343 INFO L275 PluginConnector]: Witness Printer initialized [2019-12-07 11:28:02,343 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 11:27:11" (3/4) ... [2019-12-07 11:28:02,345 INFO L137 WitnessPrinter]: Generating witness for correct program [2019-12-07 11:28:02,352 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2019-12-07 11:28:02,352 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2019-12-07 11:28:02,380 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_f6657297-4ce4-4132-bb97-61f5bb4b20d4/bin/uautomizer/witness.graphml [2019-12-07 11:28:02,380 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-12-07 11:28:02,381 INFO L168 Benchmark]: Toolchain (without parser) took 51249.74 ms. Allocated memory was 1.0 GB in the beginning and 1.4 GB in the end (delta: 342.4 MB). Free memory was 946.1 MB in the beginning and 1.2 GB in the end (delta: -264.7 MB). Peak memory consumption was 77.6 MB. Max. memory is 11.5 GB. [2019-12-07 11:28:02,381 INFO L168 Benchmark]: CDTParser took 0.14 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 11:28:02,381 INFO L168 Benchmark]: CACSL2BoogieTranslator took 178.98 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 138.9 MB). Free memory was 946.1 MB in the beginning and 1.1 GB in the end (delta: -190.3 MB). Peak memory consumption was 28.7 MB. Max. memory is 11.5 GB. [2019-12-07 11:28:02,381 INFO L168 Benchmark]: Boogie Procedure Inliner took 24.92 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 11:28:02,381 INFO L168 Benchmark]: Boogie Preprocessor took 12.07 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 11:28:02,382 INFO L168 Benchmark]: RCFGBuilder took 129.76 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 19.7 MB). Peak memory consumption was 19.7 MB. Max. memory is 11.5 GB. [2019-12-07 11:28:02,382 INFO L168 Benchmark]: TraceAbstraction took 50863.36 ms. Allocated memory was 1.2 GB in the beginning and 1.4 GB in the end (delta: 203.4 MB). Free memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: -107.5 MB). Peak memory consumption was 499.5 MB. Max. memory is 11.5 GB. [2019-12-07 11:28:02,382 INFO L168 Benchmark]: Witness Printer took 37.50 ms. Allocated memory is still 1.4 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 13.3 MB). Peak memory consumption was 13.3 MB. Max. memory is 11.5 GB. [2019-12-07 11:28:02,383 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14 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 178.98 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 138.9 MB). Free memory was 946.1 MB in the beginning and 1.1 GB in the end (delta: -190.3 MB). Peak memory consumption was 28.7 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 24.92 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 12.07 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 129.76 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 19.7 MB). Peak memory consumption was 19.7 MB. Max. memory is 11.5 GB. * TraceAbstraction took 50863.36 ms. Allocated memory was 1.2 GB in the beginning and 1.4 GB in the end (delta: 203.4 MB). Free memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: -107.5 MB). Peak memory consumption was 499.5 MB. Max. memory is 11.5 GB. * Witness Printer took 37.50 ms. Allocated memory is still 1.4 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 13.3 MB). Peak memory consumption was 13.3 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 5]: 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 - InvariantResult [Line: 10]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 13]: Loop Invariant Derived loop invariant: ((((((((((((((((((((((((((((((((((((((((((((((((((((y <= 84 && 84 <= x) && 84 <= y) && x <= 84) || (((y <= 79 && 79 <= y) && x <= 79) && 79 <= x)) || (((y <= 70 && x <= 70) && 70 <= x) && 70 <= y)) || (((y <= 96 && 96 <= y) && x <= 96) && 96 <= x)) || (((y <= 99 && 99 <= x) && 99 <= y) && x <= 99)) || (((62 <= x && x <= 62) && y <= 62) && 62 <= y)) || (((y <= 72 && 72 <= y) && 72 <= x) && x <= 72)) || (((x <= 77 && 77 <= x) && 77 <= y) && y <= 77)) || (((55 <= x && y <= 55) && 55 <= y) && x <= 55)) || (((x <= 53 && y <= 53) && 53 <= x) && 53 <= y)) || (((x <= 51 && y <= 51) && 51 <= y) && 51 <= x)) || (((y <= 91 && 91 <= x) && 91 <= y) && x <= 91)) || (((61 <= y && x <= 61) && y <= 61) && 61 <= x)) || (((x <= 83 && y <= 83) && 83 <= x) && 83 <= y)) || (((x <= 60 && y <= 60) && 60 <= x) && 60 <= y)) || (((68 <= y && x <= 68) && 68 <= x) && y <= 68)) || (((y <= 88 && x <= 88) && 88 <= x) && 88 <= y)) || (((y <= 56 && 56 <= x) && x <= 56) && 56 <= y)) || (((y <= 58 && x <= 58) && 58 <= y) && 58 <= x)) || (((x <= 57 && y <= 57) && 57 <= y) && 57 <= x)) || (((x <= 94 && y <= 94) && 94 <= x) && 94 <= y)) || (((y <= 81 && x <= 81) && 81 <= x) && 81 <= y)) || (((76 <= y && x <= 76) && y <= 76) && 76 <= x)) || (((95 <= y && y <= 95) && x <= 95) && 95 <= x)) || (((64 <= y && x <= 64) && y <= 64) && 64 <= x)) || (((93 <= x && 93 <= y) && x <= 93) && y <= 93)) || (((82 <= x && 82 <= y) && y <= 82) && x <= 82)) || ((x <= 50 && y <= 50) && 50 <= y)) || (((63 <= x && 63 <= y) && y <= 63) && x <= 63)) || (((59 <= x && 59 <= y) && y <= 59) && x <= 59)) || (((73 <= x && 73 <= y) && y <= 73) && x <= 73)) || (((y <= 54 && 54 <= y) && 54 <= x) && x <= 54)) || (((87 <= y && x <= 87) && 87 <= x) && y <= 87)) || (((x <= 90 && 90 <= x) && y <= 90) && 90 <= y)) || (((y <= 85 && 85 <= y) && x <= 85) && 85 <= x)) || (((y <= 65 && x <= 65) && 65 <= y) && 65 <= x)) || ((100 <= y && y <= 100) && 100 <= x)) || (((y <= 69 && 69 <= y) && 69 <= x) && x <= 69)) || (((86 <= x && 86 <= y) && x <= 86) && y <= 86)) || (((y <= 52 && 52 <= x) && 52 <= y) && x <= 52)) || (((89 <= x && 89 <= y) && x <= 89) && y <= 89)) || (((x <= 78 && 78 <= y) && 78 <= x) && y <= 78)) || (((y <= 75 && 75 <= x) && x <= 75) && 75 <= y)) || (((80 <= y && x <= 80) && 80 <= x) && y <= 80)) || (((97 <= y && 97 <= x) && x <= 97) && y <= 97)) || (((y <= 71 && 71 <= x) && x <= 71) && 71 <= y)) || (((66 <= x && y <= 66) && x <= 66) && 66 <= y)) || (((y <= 92 && x <= 92) && 92 <= x) && 92 <= y)) || (((y <= 98 && 98 <= y) && 98 <= x) && x <= 98)) || (((67 <= x && x <= 67) && 67 <= y) && y <= 67)) || (((x <= 74 && 74 <= y) && y <= 74) && 74 <= x) - InvariantResult [Line: 3]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 11 locations, 1 error locations. Result: SAFE, OverallTime: 49.3s, OverallIterations: 31, TraceHistogramMax: 101, AutomataDifference: 7.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 1.4s, HoareTripleCheckerStatistics: 272 SDtfs, 1521 SDslu, 8196 SDs, 0 SdLazy, 7407 SolverSat, 1834 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 3.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 4417 GetRequests, 2923 SyntacticMatches, 1 SemanticMatches, 1493 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 31.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=208occurred in iteration=30, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 31 MinimizatonAttempts, 2665 StatesRemovedByMinimization, 17 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 3 LocationsWithAnnotation, 3 PreInvPairs, 106 NumberOfFragments, 660 HoareAnnotationTreeSize, 3 FomulaSimplifications, 13400 FormulaSimplificationTreeSizeReduction, 0.4s HoareSimplificationTime, 3 FomulaSimplificationsInter, 250 FormulaSimplificationTreeSizeReductionInter, 1.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 1.4s SatisfiabilityAnalysisTime, 33.5s InterpolantComputationTime, 6153 NumberOfCodeBlocks, 5949 NumberOfCodeBlocksAsserted, 671 NumberOfCheckSat, 6094 ConstructedInterpolants, 0 QuantifiedInterpolants, 2917096 SizeOfPredicates, 20 NumberOfNonLiveVariables, 6612 ConjunctsInSsa, 1162 ConjunctsInUnsatCore, 59 InterpolantComputations, 4 PerfectInterpolantSequences, 42798/223681 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...