./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive-simple/sum_25x0-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 678e0110 Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_0993bb2a-6438-4a75-b6db-2dbd6d1a54cf/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_0993bb2a-6438-4a75-b6db-2dbd6d1a54cf/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_0993bb2a-6438-4a75-b6db-2dbd6d1a54cf/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_0993bb2a-6438-4a75-b6db-2dbd6d1a54cf/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive-simple/sum_25x0-1.c -s /tmp/vcloud-vcloud-master/worker/run_dir_0993bb2a-6438-4a75-b6db-2dbd6d1a54cf/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_0993bb2a-6438-4a75-b6db-2dbd6d1a54cf/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 4039dcb878ce4fadab8efdd435e8ec3d803b5cc8 .......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.24-678e011 [2019-11-20 11:15:24,105 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-20 11:15:24,107 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-20 11:15:24,121 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-20 11:15:24,121 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-20 11:15:24,122 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-20 11:15:24,124 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-20 11:15:24,132 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-20 11:15:24,136 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-20 11:15:24,140 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-20 11:15:24,141 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-20 11:15:24,142 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-20 11:15:24,143 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-20 11:15:24,145 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-20 11:15:24,145 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-20 11:15:24,146 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-20 11:15:24,147 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-20 11:15:24,148 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-20 11:15:24,150 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-20 11:15:24,153 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-20 11:15:24,157 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-20 11:15:24,158 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-20 11:15:24,161 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-20 11:15:24,162 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-20 11:15:24,164 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-20 11:15:24,165 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-20 11:15:24,165 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-20 11:15:24,166 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-20 11:15:24,167 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-20 11:15:24,168 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-20 11:15:24,168 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-20 11:15:24,169 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-20 11:15:24,169 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-20 11:15:24,170 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-20 11:15:24,171 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-20 11:15:24,171 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-20 11:15:24,171 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-20 11:15:24,172 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-20 11:15:24,172 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-20 11:15:24,173 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-20 11:15:24,174 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-20 11:15:24,174 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_0993bb2a-6438-4a75-b6db-2dbd6d1a54cf/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-20 11:15:24,197 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-20 11:15:24,207 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-20 11:15:24,208 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-20 11:15:24,208 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-20 11:15:24,208 INFO L138 SettingsManager]: * Use SBE=true [2019-11-20 11:15:24,209 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-20 11:15:24,209 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-20 11:15:24,209 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-20 11:15:24,209 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-20 11:15:24,209 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-20 11:15:24,210 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-20 11:15:24,210 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-20 11:15:24,210 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-20 11:15:24,210 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-20 11:15:24,210 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-20 11:15:24,211 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-20 11:15:24,211 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-20 11:15:24,212 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-20 11:15:24,212 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-20 11:15:24,212 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-20 11:15:24,212 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-20 11:15:24,213 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-20 11:15:24,213 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-20 11:15:24,213 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-20 11:15:24,213 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-20 11:15:24,214 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-20 11:15:24,214 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-20 11:15:24,214 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-20 11:15:24,214 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_0993bb2a-6438-4a75-b6db-2dbd6d1a54cf/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 -> 4039dcb878ce4fadab8efdd435e8ec3d803b5cc8 [2019-11-20 11:15:24,374 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-20 11:15:24,388 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-20 11:15:24,391 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-20 11:15:24,392 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-20 11:15:24,392 INFO L275 PluginConnector]: CDTParser initialized [2019-11-20 11:15:24,393 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_0993bb2a-6438-4a75-b6db-2dbd6d1a54cf/bin/uautomizer/../../sv-benchmarks/c/recursive-simple/sum_25x0-1.c [2019-11-20 11:15:24,450 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_0993bb2a-6438-4a75-b6db-2dbd6d1a54cf/bin/uautomizer/data/4a1404cdf/7472545948c84aefbc358c902ef5e16f/FLAGa2c543ab0 [2019-11-20 11:15:24,822 INFO L306 CDTParser]: Found 1 translation units. [2019-11-20 11:15:24,822 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_0993bb2a-6438-4a75-b6db-2dbd6d1a54cf/sv-benchmarks/c/recursive-simple/sum_25x0-1.c [2019-11-20 11:15:24,827 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_0993bb2a-6438-4a75-b6db-2dbd6d1a54cf/bin/uautomizer/data/4a1404cdf/7472545948c84aefbc358c902ef5e16f/FLAGa2c543ab0 [2019-11-20 11:15:25,273 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_0993bb2a-6438-4a75-b6db-2dbd6d1a54cf/bin/uautomizer/data/4a1404cdf/7472545948c84aefbc358c902ef5e16f [2019-11-20 11:15:25,276 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-20 11:15:25,278 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-20 11:15:25,281 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-20 11:15:25,281 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-20 11:15:25,284 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-20 11:15:25,285 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:15:25" (1/1) ... [2019-11-20 11:15:25,287 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@37b4384b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:15:25, skipping insertion in model container [2019-11-20 11:15:25,287 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:15:25" (1/1) ... [2019-11-20 11:15:25,299 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-20 11:15:25,314 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-20 11:15:25,490 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-20 11:15:25,494 INFO L188 MainTranslator]: Completed pre-run [2019-11-20 11:15:25,576 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-20 11:15:25,588 INFO L192 MainTranslator]: Completed translation [2019-11-20 11:15:25,588 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:15:25 WrapperNode [2019-11-20 11:15:25,589 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-20 11:15:25,589 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-20 11:15:25,590 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-20 11:15:25,590 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-20 11:15:25,598 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:15:25" (1/1) ... [2019-11-20 11:15:25,602 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:15:25" (1/1) ... [2019-11-20 11:15:25,617 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-20 11:15:25,618 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-20 11:15:25,618 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-20 11:15:25,618 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-20 11:15:25,627 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:15:25" (1/1) ... [2019-11-20 11:15:25,627 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:15:25" (1/1) ... [2019-11-20 11:15:25,628 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:15:25" (1/1) ... [2019-11-20 11:15:25,628 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:15:25" (1/1) ... [2019-11-20 11:15:25,630 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:15:25" (1/1) ... [2019-11-20 11:15:25,632 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:15:25" (1/1) ... [2019-11-20 11:15:25,633 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:15:25" (1/1) ... [2019-11-20 11:15:25,634 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-20 11:15:25,634 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-20 11:15:25,635 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-20 11:15:25,635 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-20 11:15:25,636 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:15:25" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0993bb2a-6438-4a75-b6db-2dbd6d1a54cf/bin/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-20 11:15:25,691 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-20 11:15:25,691 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-20 11:15:25,692 INFO L130 BoogieDeclarations]: Found specification of procedure sum [2019-11-20 11:15:25,692 INFO L138 BoogieDeclarations]: Found implementation of procedure sum [2019-11-20 11:15:25,837 INFO L280 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-20 11:15:25,837 INFO L285 CfgBuilder]: Removed 4 assume(true) statements. [2019-11-20 11:15:25,838 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:15:25 BoogieIcfgContainer [2019-11-20 11:15:25,838 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-20 11:15:25,839 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-20 11:15:25,839 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-20 11:15:25,841 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-20 11:15:25,842 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 11:15:25" (1/3) ... [2019-11-20 11:15:25,842 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72835812 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:15:25, skipping insertion in model container [2019-11-20 11:15:25,845 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:15:25" (2/3) ... [2019-11-20 11:15:25,845 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72835812 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:15:25, skipping insertion in model container [2019-11-20 11:15:25,846 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:15:25" (3/3) ... [2019-11-20 11:15:25,847 INFO L109 eAbstractionObserver]: Analyzing ICFG sum_25x0-1.c [2019-11-20 11:15:25,856 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-20 11:15:25,861 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-20 11:15:25,871 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-20 11:15:25,891 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-20 11:15:25,892 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-20 11:15:25,892 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-20 11:15:25,892 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-20 11:15:25,892 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-20 11:15:25,892 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-20 11:15:25,893 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-20 11:15:25,893 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-20 11:15:25,907 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states. [2019-11-20 11:15:25,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-11-20 11:15:25,912 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 11:15:25,913 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 11:15:25,913 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 11:15:25,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 11:15:25,918 INFO L82 PathProgramCache]: Analyzing trace with hash 389977641, now seen corresponding path program 1 times [2019-11-20 11:15:25,926 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 11:15:25,927 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143771780] [2019-11-20 11:15:25,927 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 11:15:26,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:26,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:26,149 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 11:15:26,149 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143771780] [2019-11-20 11:15:26,150 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-20 11:15:26,150 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-20 11:15:26,152 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726569961] [2019-11-20 11:15:26,156 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-20 11:15:26,156 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 11:15:26,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-20 11:15:26,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-20 11:15:26,177 INFO L87 Difference]: Start difference. First operand 15 states. Second operand 5 states. [2019-11-20 11:15:26,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 11:15:26,265 INFO L93 Difference]: Finished difference Result 24 states and 27 transitions. [2019-11-20 11:15:26,265 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-20 11:15:26,267 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2019-11-20 11:15:26,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 11:15:26,275 INFO L225 Difference]: With dead ends: 24 [2019-11-20 11:15:26,275 INFO L226 Difference]: Without dead ends: 14 [2019-11-20 11:15:26,278 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-20 11:15:26,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2019-11-20 11:15:26,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2019-11-20 11:15:26,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2019-11-20 11:15:26,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2019-11-20 11:15:26,312 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 9 [2019-11-20 11:15:26,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 11:15:26,312 INFO L462 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2019-11-20 11:15:26,312 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-20 11:15:26,313 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2019-11-20 11:15:26,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-20 11:15:26,314 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 11:15:26,314 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 11:15:26,314 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 11:15:26,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 11:15:26,315 INFO L82 PathProgramCache]: Analyzing trace with hash -881029229, now seen corresponding path program 1 times [2019-11-20 11:15:26,315 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 11:15:26,315 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034476886] [2019-11-20 11:15:26,315 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 11:15:26,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:26,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:26,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:26,402 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-20 11:15:26,402 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034476886] [2019-11-20 11:15:26,403 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1385586812] [2019-11-20 11:15:26,403 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0993bb2a-6438-4a75-b6db-2dbd6d1a54cf/bin/uautomizer/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 11:15:26,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:26,452 INFO L255 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-20 11:15:26,457 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 11:15:26,507 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-20 11:15:26,507 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 11:15:26,508 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2019-11-20 11:15:26,509 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833826079] [2019-11-20 11:15:26,509 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-20 11:15:26,509 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 11:15:26,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-20 11:15:26,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-11-20 11:15:26,510 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 7 states. [2019-11-20 11:15:26,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 11:15:26,602 INFO L93 Difference]: Finished difference Result 21 states and 22 transitions. [2019-11-20 11:15:26,603 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-20 11:15:26,603 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 15 [2019-11-20 11:15:26,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 11:15:26,604 INFO L225 Difference]: With dead ends: 21 [2019-11-20 11:15:26,604 INFO L226 Difference]: Without dead ends: 17 [2019-11-20 11:15:26,605 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-11-20 11:15:26,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2019-11-20 11:15:26,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2019-11-20 11:15:26,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-11-20 11:15:26,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2019-11-20 11:15:26,621 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 15 [2019-11-20 11:15:26,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 11:15:26,622 INFO L462 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2019-11-20 11:15:26,622 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-20 11:15:26,622 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2019-11-20 11:15:26,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-11-20 11:15:26,623 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 11:15:26,623 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 11:15:26,825 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 11:15:26,826 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 11:15:26,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 11:15:26,826 INFO L82 PathProgramCache]: Analyzing trace with hash -1824240471, now seen corresponding path program 2 times [2019-11-20 11:15:26,826 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 11:15:26,827 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911569669] [2019-11-20 11:15:26,827 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 11:15:26,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:26,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:26,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:26,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:26,970 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-11-20 11:15:26,970 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911569669] [2019-11-20 11:15:26,971 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1864748696] [2019-11-20 11:15:26,971 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0993bb2a-6438-4a75-b6db-2dbd6d1a54cf/bin/uautomizer/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 11:15:27,003 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-20 11:15:27,004 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 11:15:27,005 INFO L255 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-20 11:15:27,006 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 11:15:27,041 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-11-20 11:15:27,041 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 11:15:27,042 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2019-11-20 11:15:27,042 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935694137] [2019-11-20 11:15:27,043 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-20 11:15:27,043 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 11:15:27,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-20 11:15:27,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-11-20 11:15:27,043 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 8 states. [2019-11-20 11:15:27,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 11:15:27,125 INFO L93 Difference]: Finished difference Result 24 states and 25 transitions. [2019-11-20 11:15:27,126 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-20 11:15:27,126 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 21 [2019-11-20 11:15:27,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 11:15:27,127 INFO L225 Difference]: With dead ends: 24 [2019-11-20 11:15:27,127 INFO L226 Difference]: Without dead ends: 20 [2019-11-20 11:15:27,127 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2019-11-20 11:15:27,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-11-20 11:15:27,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2019-11-20 11:15:27,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-11-20 11:15:27,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2019-11-20 11:15:27,132 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 21 [2019-11-20 11:15:27,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 11:15:27,133 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2019-11-20 11:15:27,133 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-20 11:15:27,133 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2019-11-20 11:15:27,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-11-20 11:15:27,134 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 11:15:27,134 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 11:15:27,335 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 11:15:27,335 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 11:15:27,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 11:15:27,335 INFO L82 PathProgramCache]: Analyzing trace with hash -28473709, now seen corresponding path program 3 times [2019-11-20 11:15:27,336 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 11:15:27,336 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060026759] [2019-11-20 11:15:27,336 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 11:15:27,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:27,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:27,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:27,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:27,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:27,487 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-20 11:15:27,487 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060026759] [2019-11-20 11:15:27,487 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1315758322] [2019-11-20 11:15:27,487 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0993bb2a-6438-4a75-b6db-2dbd6d1a54cf/bin/uautomizer/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 11:15:27,533 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-11-20 11:15:27,533 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 11:15:27,534 INFO L255 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-20 11:15:27,536 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 11:15:27,557 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-20 11:15:27,557 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 11:15:27,557 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2019-11-20 11:15:27,558 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341235782] [2019-11-20 11:15:27,558 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-20 11:15:27,558 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 11:15:27,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-20 11:15:27,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-11-20 11:15:27,559 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 9 states. [2019-11-20 11:15:27,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 11:15:27,646 INFO L93 Difference]: Finished difference Result 27 states and 28 transitions. [2019-11-20 11:15:27,647 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-20 11:15:27,647 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 27 [2019-11-20 11:15:27,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 11:15:27,648 INFO L225 Difference]: With dead ends: 27 [2019-11-20 11:15:27,648 INFO L226 Difference]: Without dead ends: 23 [2019-11-20 11:15:27,649 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2019-11-20 11:15:27,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2019-11-20 11:15:27,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2019-11-20 11:15:27,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-11-20 11:15:27,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2019-11-20 11:15:27,654 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 27 [2019-11-20 11:15:27,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 11:15:27,654 INFO L462 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2019-11-20 11:15:27,654 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-20 11:15:27,654 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2019-11-20 11:15:27,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2019-11-20 11:15:27,656 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 11:15:27,656 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 11:15:27,859 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 11:15:27,859 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 11:15:27,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 11:15:27,859 INFO L82 PathProgramCache]: Analyzing trace with hash -2080894167, now seen corresponding path program 4 times [2019-11-20 11:15:27,860 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 11:15:27,860 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089825543] [2019-11-20 11:15:27,860 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 11:15:27,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:27,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:27,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:27,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:27,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:28,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:28,038 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2019-11-20 11:15:28,038 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089825543] [2019-11-20 11:15:28,038 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [608817629] [2019-11-20 11:15:28,039 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0993bb2a-6438-4a75-b6db-2dbd6d1a54cf/bin/uautomizer/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 11:15:28,074 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-20 11:15:28,075 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 11:15:28,076 INFO L255 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-20 11:15:28,078 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 11:15:28,100 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2019-11-20 11:15:28,101 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 11:15:28,101 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2019-11-20 11:15:28,101 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619147357] [2019-11-20 11:15:28,102 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-20 11:15:28,102 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 11:15:28,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-20 11:15:28,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2019-11-20 11:15:28,103 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand 10 states. [2019-11-20 11:15:28,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 11:15:28,203 INFO L93 Difference]: Finished difference Result 30 states and 31 transitions. [2019-11-20 11:15:28,204 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-20 11:15:28,205 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 33 [2019-11-20 11:15:28,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 11:15:28,206 INFO L225 Difference]: With dead ends: 30 [2019-11-20 11:15:28,206 INFO L226 Difference]: Without dead ends: 26 [2019-11-20 11:15:28,207 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2019-11-20 11:15:28,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-11-20 11:15:28,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2019-11-20 11:15:28,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-11-20 11:15:28,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2019-11-20 11:15:28,212 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 33 [2019-11-20 11:15:28,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 11:15:28,212 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2019-11-20 11:15:28,212 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-20 11:15:28,214 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2019-11-20 11:15:28,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-11-20 11:15:28,217 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 11:15:28,217 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 11:15:28,418 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 11:15:28,418 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 11:15:28,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 11:15:28,419 INFO L82 PathProgramCache]: Analyzing trace with hash -687460973, now seen corresponding path program 5 times [2019-11-20 11:15:28,427 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 11:15:28,428 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807284096] [2019-11-20 11:15:28,428 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 11:15:28,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:28,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:28,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:28,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:28,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:28,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:28,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:28,669 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2019-11-20 11:15:28,670 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807284096] [2019-11-20 11:15:28,670 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [547543937] [2019-11-20 11:15:28,670 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0993bb2a-6438-4a75-b6db-2dbd6d1a54cf/bin/uautomizer/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 11:15:28,718 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2019-11-20 11:15:28,718 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 11:15:28,719 INFO L255 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 14 conjunts are in the unsatisfiable core [2019-11-20 11:15:28,721 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 11:15:28,754 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2019-11-20 11:15:28,755 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 11:15:28,755 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2019-11-20 11:15:28,755 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098240534] [2019-11-20 11:15:28,756 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-20 11:15:28,756 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 11:15:28,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-20 11:15:28,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2019-11-20 11:15:28,757 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand 11 states. [2019-11-20 11:15:28,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 11:15:28,865 INFO L93 Difference]: Finished difference Result 33 states and 34 transitions. [2019-11-20 11:15:28,865 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-20 11:15:28,866 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 39 [2019-11-20 11:15:28,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 11:15:28,867 INFO L225 Difference]: With dead ends: 33 [2019-11-20 11:15:28,867 INFO L226 Difference]: Without dead ends: 29 [2019-11-20 11:15:28,868 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=95, Invalid=177, Unknown=0, NotChecked=0, Total=272 [2019-11-20 11:15:28,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-11-20 11:15:28,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2019-11-20 11:15:28,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-11-20 11:15:28,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2019-11-20 11:15:28,878 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 39 [2019-11-20 11:15:28,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 11:15:28,881 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2019-11-20 11:15:28,881 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-20 11:15:28,881 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2019-11-20 11:15:28,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2019-11-20 11:15:28,884 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 11:15:28,884 INFO L410 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 11:15:29,085 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 11:15:29,085 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 11:15:29,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 11:15:29,085 INFO L82 PathProgramCache]: Analyzing trace with hash 547744169, now seen corresponding path program 6 times [2019-11-20 11:15:29,086 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 11:15:29,086 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773278765] [2019-11-20 11:15:29,086 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 11:15:29,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:29,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:29,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:29,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:29,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:29,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:29,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:29,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:29,302 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2019-11-20 11:15:29,302 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773278765] [2019-11-20 11:15:29,302 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [232548835] [2019-11-20 11:15:29,303 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0993bb2a-6438-4a75-b6db-2dbd6d1a54cf/bin/uautomizer/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 11:15:29,357 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-11-20 11:15:29,357 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 11:15:29,358 INFO L255 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 16 conjunts are in the unsatisfiable core [2019-11-20 11:15:29,361 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 11:15:29,391 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2019-11-20 11:15:29,392 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 11:15:29,392 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2019-11-20 11:15:29,392 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279352593] [2019-11-20 11:15:29,393 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-20 11:15:29,393 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 11:15:29,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-20 11:15:29,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2019-11-20 11:15:29,394 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand 12 states. [2019-11-20 11:15:29,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 11:15:29,508 INFO L93 Difference]: Finished difference Result 36 states and 37 transitions. [2019-11-20 11:15:29,508 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-20 11:15:29,508 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 45 [2019-11-20 11:15:29,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 11:15:29,509 INFO L225 Difference]: With dead ends: 36 [2019-11-20 11:15:29,510 INFO L226 Difference]: Without dead ends: 32 [2019-11-20 11:15:29,510 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=222, Unknown=0, NotChecked=0, Total=342 [2019-11-20 11:15:29,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-11-20 11:15:29,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2019-11-20 11:15:29,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-11-20 11:15:29,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2019-11-20 11:15:29,516 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 45 [2019-11-20 11:15:29,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 11:15:29,516 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2019-11-20 11:15:29,516 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-20 11:15:29,516 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2019-11-20 11:15:29,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2019-11-20 11:15:29,517 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 11:15:29,518 INFO L410 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 11:15:29,720 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 11:15:29,720 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 11:15:29,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 11:15:29,721 INFO L82 PathProgramCache]: Analyzing trace with hash -247823213, now seen corresponding path program 7 times [2019-11-20 11:15:29,721 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 11:15:29,721 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105033947] [2019-11-20 11:15:29,721 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 11:15:29,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:29,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:29,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:29,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:29,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:29,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:29,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:29,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:29,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:29,951 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2019-11-20 11:15:29,952 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105033947] [2019-11-20 11:15:29,952 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [253499472] [2019-11-20 11:15:29,952 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0993bb2a-6438-4a75-b6db-2dbd6d1a54cf/bin/uautomizer/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 11:15:30,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:30,008 INFO L255 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 18 conjunts are in the unsatisfiable core [2019-11-20 11:15:30,012 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 11:15:30,051 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2019-11-20 11:15:30,051 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 11:15:30,051 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2019-11-20 11:15:30,052 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337774916] [2019-11-20 11:15:30,054 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-20 11:15:30,054 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 11:15:30,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-20 11:15:30,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2019-11-20 11:15:30,056 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand 13 states. [2019-11-20 11:15:30,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 11:15:30,210 INFO L93 Difference]: Finished difference Result 39 states and 40 transitions. [2019-11-20 11:15:30,211 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-20 11:15:30,211 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 51 [2019-11-20 11:15:30,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 11:15:30,211 INFO L225 Difference]: With dead ends: 39 [2019-11-20 11:15:30,212 INFO L226 Difference]: Without dead ends: 35 [2019-11-20 11:15:30,212 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=148, Invalid=272, Unknown=0, NotChecked=0, Total=420 [2019-11-20 11:15:30,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-11-20 11:15:30,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2019-11-20 11:15:30,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-11-20 11:15:30,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2019-11-20 11:15:30,217 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 51 [2019-11-20 11:15:30,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 11:15:30,218 INFO L462 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2019-11-20 11:15:30,218 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-20 11:15:30,218 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2019-11-20 11:15:30,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2019-11-20 11:15:30,219 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 11:15:30,219 INFO L410 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 11:15:30,425 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 11:15:30,425 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 11:15:30,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 11:15:30,426 INFO L82 PathProgramCache]: Analyzing trace with hash -1818636247, now seen corresponding path program 8 times [2019-11-20 11:15:30,426 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 11:15:30,426 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540968910] [2019-11-20 11:15:30,426 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 11:15:30,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:30,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:30,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:30,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:30,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:30,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:30,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:30,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:30,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:30,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:30,650 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2019-11-20 11:15:30,651 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540968910] [2019-11-20 11:15:30,651 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1945239381] [2019-11-20 11:15:30,654 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0993bb2a-6438-4a75-b6db-2dbd6d1a54cf/bin/uautomizer/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 11:15:30,699 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-20 11:15:30,699 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 11:15:30,700 INFO L255 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 20 conjunts are in the unsatisfiable core [2019-11-20 11:15:30,706 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 11:15:30,745 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2019-11-20 11:15:30,746 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 11:15:30,746 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2019-11-20 11:15:30,748 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904237785] [2019-11-20 11:15:30,748 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-20 11:15:30,749 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 11:15:30,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-20 11:15:30,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2019-11-20 11:15:30,749 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand 14 states. [2019-11-20 11:15:30,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 11:15:30,887 INFO L93 Difference]: Finished difference Result 42 states and 43 transitions. [2019-11-20 11:15:30,887 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-20 11:15:30,888 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 57 [2019-11-20 11:15:30,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 11:15:30,889 INFO L225 Difference]: With dead ends: 42 [2019-11-20 11:15:30,889 INFO L226 Difference]: Without dead ends: 38 [2019-11-20 11:15:30,889 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=179, Invalid=327, Unknown=0, NotChecked=0, Total=506 [2019-11-20 11:15:30,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2019-11-20 11:15:30,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2019-11-20 11:15:30,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-11-20 11:15:30,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2019-11-20 11:15:30,894 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 57 [2019-11-20 11:15:30,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 11:15:30,895 INFO L462 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2019-11-20 11:15:30,895 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-20 11:15:30,895 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2019-11-20 11:15:30,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2019-11-20 11:15:30,896 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 11:15:30,896 INFO L410 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 11:15:31,102 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 11:15:31,102 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 11:15:31,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 11:15:31,103 INFO L82 PathProgramCache]: Analyzing trace with hash -2055304301, now seen corresponding path program 9 times [2019-11-20 11:15:31,103 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 11:15:31,103 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332552072] [2019-11-20 11:15:31,104 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 11:15:31,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:31,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:31,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:31,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:31,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:31,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:31,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:31,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:31,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:31,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:31,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:31,390 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2019-11-20 11:15:31,391 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332552072] [2019-11-20 11:15:31,391 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1446042383] [2019-11-20 11:15:31,391 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0993bb2a-6438-4a75-b6db-2dbd6d1a54cf/bin/uautomizer/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 11:15:31,452 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2019-11-20 11:15:31,452 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 11:15:31,457 INFO L255 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 22 conjunts are in the unsatisfiable core [2019-11-20 11:15:31,460 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 11:15:31,497 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2019-11-20 11:15:31,498 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 11:15:31,498 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2019-11-20 11:15:31,499 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309466640] [2019-11-20 11:15:31,500 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-11-20 11:15:31,501 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 11:15:31,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-11-20 11:15:31,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2019-11-20 11:15:31,501 INFO L87 Difference]: Start difference. First operand 38 states and 39 transitions. Second operand 15 states. [2019-11-20 11:15:31,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 11:15:31,652 INFO L93 Difference]: Finished difference Result 45 states and 46 transitions. [2019-11-20 11:15:31,653 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-11-20 11:15:31,653 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 63 [2019-11-20 11:15:31,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 11:15:31,654 INFO L225 Difference]: With dead ends: 45 [2019-11-20 11:15:31,654 INFO L226 Difference]: Without dead ends: 41 [2019-11-20 11:15:31,655 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=213, Invalid=387, Unknown=0, NotChecked=0, Total=600 [2019-11-20 11:15:31,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2019-11-20 11:15:31,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2019-11-20 11:15:31,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-11-20 11:15:31,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2019-11-20 11:15:31,660 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 63 [2019-11-20 11:15:31,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 11:15:31,661 INFO L462 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2019-11-20 11:15:31,661 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-11-20 11:15:31,661 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2019-11-20 11:15:31,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2019-11-20 11:15:31,669 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 11:15:31,669 INFO L410 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 11:15:31,880 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 11:15:31,880 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 11:15:31,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 11:15:31,880 INFO L82 PathProgramCache]: Analyzing trace with hash -1172322647, now seen corresponding path program 10 times [2019-11-20 11:15:31,880 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 11:15:31,880 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676786485] [2019-11-20 11:15:31,881 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 11:15:31,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:31,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:31,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:31,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:32,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:32,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:32,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:32,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:32,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:32,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:32,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:32,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:32,178 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2019-11-20 11:15:32,178 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676786485] [2019-11-20 11:15:32,179 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1332988717] [2019-11-20 11:15:32,179 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0993bb2a-6438-4a75-b6db-2dbd6d1a54cf/bin/uautomizer/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 11:15:32,232 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-20 11:15:32,232 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 11:15:32,233 INFO L255 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 24 conjunts are in the unsatisfiable core [2019-11-20 11:15:32,236 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 11:15:32,279 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2019-11-20 11:15:32,279 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 11:15:32,279 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2019-11-20 11:15:32,280 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444618926] [2019-11-20 11:15:32,280 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-11-20 11:15:32,280 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 11:15:32,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-11-20 11:15:32,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2019-11-20 11:15:32,281 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand 16 states. [2019-11-20 11:15:32,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 11:15:32,448 INFO L93 Difference]: Finished difference Result 48 states and 49 transitions. [2019-11-20 11:15:32,449 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-11-20 11:15:32,449 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 69 [2019-11-20 11:15:32,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 11:15:32,450 INFO L225 Difference]: With dead ends: 48 [2019-11-20 11:15:32,450 INFO L226 Difference]: Without dead ends: 44 [2019-11-20 11:15:32,451 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=250, Invalid=452, Unknown=0, NotChecked=0, Total=702 [2019-11-20 11:15:32,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2019-11-20 11:15:32,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2019-11-20 11:15:32,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-11-20 11:15:32,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 45 transitions. [2019-11-20 11:15:32,459 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 45 transitions. Word has length 69 [2019-11-20 11:15:32,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 11:15:32,460 INFO L462 AbstractCegarLoop]: Abstraction has 44 states and 45 transitions. [2019-11-20 11:15:32,460 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-11-20 11:15:32,460 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 45 transitions. [2019-11-20 11:15:32,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2019-11-20 11:15:32,464 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 11:15:32,465 INFO L410 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 11:15:32,672 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 11:15:32,673 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 11:15:32,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 11:15:32,673 INFO L82 PathProgramCache]: Analyzing trace with hash -1452916077, now seen corresponding path program 11 times [2019-11-20 11:15:32,673 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 11:15:32,673 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063047779] [2019-11-20 11:15:32,673 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 11:15:32,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:32,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:32,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:32,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:32,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:32,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:32,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:32,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:32,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:32,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:32,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:32,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:32,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:33,051 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2019-11-20 11:15:33,051 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063047779] [2019-11-20 11:15:33,051 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [908870096] [2019-11-20 11:15:33,051 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0993bb2a-6438-4a75-b6db-2dbd6d1a54cf/bin/uautomizer/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 11:15:33,107 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2019-11-20 11:15:33,107 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 11:15:33,108 INFO L255 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 26 conjunts are in the unsatisfiable core [2019-11-20 11:15:33,110 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 11:15:33,158 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2019-11-20 11:15:33,158 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 11:15:33,159 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2019-11-20 11:15:33,159 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109869727] [2019-11-20 11:15:33,159 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-11-20 11:15:33,160 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 11:15:33,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-11-20 11:15:33,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=174, Unknown=0, NotChecked=0, Total=272 [2019-11-20 11:15:33,160 INFO L87 Difference]: Start difference. First operand 44 states and 45 transitions. Second operand 17 states. [2019-11-20 11:15:33,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 11:15:33,316 INFO L93 Difference]: Finished difference Result 51 states and 52 transitions. [2019-11-20 11:15:33,316 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-11-20 11:15:33,316 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 75 [2019-11-20 11:15:33,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 11:15:33,317 INFO L225 Difference]: With dead ends: 51 [2019-11-20 11:15:33,317 INFO L226 Difference]: Without dead ends: 47 [2019-11-20 11:15:33,318 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=290, Invalid=522, Unknown=0, NotChecked=0, Total=812 [2019-11-20 11:15:33,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2019-11-20 11:15:33,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2019-11-20 11:15:33,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2019-11-20 11:15:33,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 48 transitions. [2019-11-20 11:15:33,323 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 48 transitions. Word has length 75 [2019-11-20 11:15:33,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 11:15:33,324 INFO L462 AbstractCegarLoop]: Abstraction has 47 states and 48 transitions. [2019-11-20 11:15:33,324 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-11-20 11:15:33,324 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 48 transitions. [2019-11-20 11:15:33,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2019-11-20 11:15:33,325 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 11:15:33,325 INFO L410 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 11:15:33,533 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 11:15:33,533 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 11:15:33,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 11:15:33,533 INFO L82 PathProgramCache]: Analyzing trace with hash -461124311, now seen corresponding path program 12 times [2019-11-20 11:15:33,534 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 11:15:33,534 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364975732] [2019-11-20 11:15:33,534 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 11:15:33,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:33,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:33,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:33,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:33,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:33,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:33,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:33,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:33,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:33,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:33,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:33,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:33,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:33,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:33,879 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2019-11-20 11:15:33,880 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364975732] [2019-11-20 11:15:33,880 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1428243366] [2019-11-20 11:15:33,880 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0993bb2a-6438-4a75-b6db-2dbd6d1a54cf/bin/uautomizer/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 11:15:33,936 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2019-11-20 11:15:33,936 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 11:15:33,938 INFO L255 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 28 conjunts are in the unsatisfiable core [2019-11-20 11:15:33,940 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 11:15:33,976 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2019-11-20 11:15:33,976 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 11:15:33,976 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2019-11-20 11:15:33,977 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29453231] [2019-11-20 11:15:33,977 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-11-20 11:15:33,977 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 11:15:33,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-11-20 11:15:33,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=194, Unknown=0, NotChecked=0, Total=306 [2019-11-20 11:15:33,978 INFO L87 Difference]: Start difference. First operand 47 states and 48 transitions. Second operand 18 states. [2019-11-20 11:15:34,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 11:15:34,184 INFO L93 Difference]: Finished difference Result 54 states and 55 transitions. [2019-11-20 11:15:34,184 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-11-20 11:15:34,184 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 81 [2019-11-20 11:15:34,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 11:15:34,185 INFO L225 Difference]: With dead ends: 54 [2019-11-20 11:15:34,185 INFO L226 Difference]: Without dead ends: 50 [2019-11-20 11:15:34,187 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=333, Invalid=597, Unknown=0, NotChecked=0, Total=930 [2019-11-20 11:15:34,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2019-11-20 11:15:34,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2019-11-20 11:15:34,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2019-11-20 11:15:34,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 51 transitions. [2019-11-20 11:15:34,192 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 51 transitions. Word has length 81 [2019-11-20 11:15:34,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 11:15:34,198 INFO L462 AbstractCegarLoop]: Abstraction has 50 states and 51 transitions. [2019-11-20 11:15:34,198 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-11-20 11:15:34,199 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 51 transitions. [2019-11-20 11:15:34,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2019-11-20 11:15:34,200 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 11:15:34,200 INFO L410 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 11:15:34,400 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 11:15:34,400 INFO L410 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 11:15:34,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 11:15:34,401 INFO L82 PathProgramCache]: Analyzing trace with hash -1887065709, now seen corresponding path program 13 times [2019-11-20 11:15:34,401 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 11:15:34,401 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975622777] [2019-11-20 11:15:34,401 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 11:15:34,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:34,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:34,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:34,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:34,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:34,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:34,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:34,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:34,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:34,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:34,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:34,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:34,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:34,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:34,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:34,826 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2019-11-20 11:15:34,829 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975622777] [2019-11-20 11:15:34,830 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1582871004] [2019-11-20 11:15:34,830 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0993bb2a-6438-4a75-b6db-2dbd6d1a54cf/bin/uautomizer/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 11:15:34,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:34,886 INFO L255 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 30 conjunts are in the unsatisfiable core [2019-11-20 11:15:34,890 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 11:15:34,926 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2019-11-20 11:15:34,926 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 11:15:34,927 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2019-11-20 11:15:34,927 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866656184] [2019-11-20 11:15:34,927 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-11-20 11:15:34,927 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 11:15:34,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-11-20 11:15:34,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=215, Unknown=0, NotChecked=0, Total=342 [2019-11-20 11:15:34,928 INFO L87 Difference]: Start difference. First operand 50 states and 51 transitions. Second operand 19 states. [2019-11-20 11:15:35,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 11:15:35,119 INFO L93 Difference]: Finished difference Result 57 states and 58 transitions. [2019-11-20 11:15:35,119 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-11-20 11:15:35,119 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 87 [2019-11-20 11:15:35,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 11:15:35,120 INFO L225 Difference]: With dead ends: 57 [2019-11-20 11:15:35,120 INFO L226 Difference]: Without dead ends: 53 [2019-11-20 11:15:35,121 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=379, Invalid=677, Unknown=0, NotChecked=0, Total=1056 [2019-11-20 11:15:35,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2019-11-20 11:15:35,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2019-11-20 11:15:35,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2019-11-20 11:15:35,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2019-11-20 11:15:35,126 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 87 [2019-11-20 11:15:35,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 11:15:35,127 INFO L462 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2019-11-20 11:15:35,127 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-11-20 11:15:35,127 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2019-11-20 11:15:35,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2019-11-20 11:15:35,128 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 11:15:35,128 INFO L410 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 11:15:35,331 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 11:15:35,331 INFO L410 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 11:15:35,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 11:15:35,332 INFO L82 PathProgramCache]: Analyzing trace with hash -1777212503, now seen corresponding path program 14 times [2019-11-20 11:15:35,332 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 11:15:35,332 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957076132] [2019-11-20 11:15:35,332 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 11:15:35,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:35,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:35,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:35,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:35,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:35,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:35,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:35,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:35,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:35,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:35,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:35,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:35,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:35,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:35,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:35,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:35,842 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2019-11-20 11:15:35,842 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957076132] [2019-11-20 11:15:35,843 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [166130002] [2019-11-20 11:15:35,843 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0993bb2a-6438-4a75-b6db-2dbd6d1a54cf/bin/uautomizer/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 11:15:35,904 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-20 11:15:35,904 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 11:15:35,906 INFO L255 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 32 conjunts are in the unsatisfiable core [2019-11-20 11:15:35,908 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 11:15:35,949 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2019-11-20 11:15:35,950 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 11:15:35,950 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2019-11-20 11:15:35,950 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538346210] [2019-11-20 11:15:35,951 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-11-20 11:15:35,951 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 11:15:35,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-11-20 11:15:35,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=237, Unknown=0, NotChecked=0, Total=380 [2019-11-20 11:15:35,951 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand 20 states. [2019-11-20 11:15:36,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 11:15:36,160 INFO L93 Difference]: Finished difference Result 60 states and 61 transitions. [2019-11-20 11:15:36,161 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-11-20 11:15:36,161 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 93 [2019-11-20 11:15:36,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 11:15:36,162 INFO L225 Difference]: With dead ends: 60 [2019-11-20 11:15:36,162 INFO L226 Difference]: Without dead ends: 56 [2019-11-20 11:15:36,163 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=428, Invalid=762, Unknown=0, NotChecked=0, Total=1190 [2019-11-20 11:15:36,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2019-11-20 11:15:36,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2019-11-20 11:15:36,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2019-11-20 11:15:36,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 57 transitions. [2019-11-20 11:15:36,168 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 57 transitions. Word has length 93 [2019-11-20 11:15:36,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 11:15:36,168 INFO L462 AbstractCegarLoop]: Abstraction has 56 states and 57 transitions. [2019-11-20 11:15:36,168 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-11-20 11:15:36,168 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 57 transitions. [2019-11-20 11:15:36,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2019-11-20 11:15:36,175 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 11:15:36,176 INFO L410 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 11:15:36,376 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 11:15:36,376 INFO L410 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 11:15:36,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 11:15:36,376 INFO L82 PathProgramCache]: Analyzing trace with hash -948911981, now seen corresponding path program 15 times [2019-11-20 11:15:36,377 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 11:15:36,377 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90590767] [2019-11-20 11:15:36,377 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 11:15:36,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:36,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:36,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:36,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:36,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:36,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:36,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:36,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:36,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:36,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:36,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:36,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:36,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:36,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:36,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:36,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:36,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:36,916 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2019-11-20 11:15:36,917 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90590767] [2019-11-20 11:15:36,917 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1787963294] [2019-11-20 11:15:36,917 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0993bb2a-6438-4a75-b6db-2dbd6d1a54cf/bin/uautomizer/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 11:15:36,994 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2019-11-20 11:15:36,994 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 11:15:36,995 INFO L255 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 34 conjunts are in the unsatisfiable core [2019-11-20 11:15:36,997 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 11:15:37,043 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2019-11-20 11:15:37,043 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 11:15:37,043 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2019-11-20 11:15:37,043 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325732767] [2019-11-20 11:15:37,044 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-11-20 11:15:37,045 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 11:15:37,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-11-20 11:15:37,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=260, Unknown=0, NotChecked=0, Total=420 [2019-11-20 11:15:37,045 INFO L87 Difference]: Start difference. First operand 56 states and 57 transitions. Second operand 21 states. [2019-11-20 11:15:37,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 11:15:37,274 INFO L93 Difference]: Finished difference Result 63 states and 64 transitions. [2019-11-20 11:15:37,274 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-11-20 11:15:37,274 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 99 [2019-11-20 11:15:37,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 11:15:37,275 INFO L225 Difference]: With dead ends: 63 [2019-11-20 11:15:37,275 INFO L226 Difference]: Without dead ends: 59 [2019-11-20 11:15:37,276 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=480, Invalid=852, Unknown=0, NotChecked=0, Total=1332 [2019-11-20 11:15:37,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2019-11-20 11:15:37,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2019-11-20 11:15:37,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2019-11-20 11:15:37,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 60 transitions. [2019-11-20 11:15:37,282 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 60 transitions. Word has length 99 [2019-11-20 11:15:37,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 11:15:37,282 INFO L462 AbstractCegarLoop]: Abstraction has 59 states and 60 transitions. [2019-11-20 11:15:37,282 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-11-20 11:15:37,282 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 60 transitions. [2019-11-20 11:15:37,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2019-11-20 11:15:37,283 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 11:15:37,283 INFO L410 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 11:15:37,486 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 11:15:37,487 INFO L410 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 11:15:37,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 11:15:37,487 INFO L82 PathProgramCache]: Analyzing trace with hash 1159072297, now seen corresponding path program 16 times [2019-11-20 11:15:37,487 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 11:15:37,487 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616494904] [2019-11-20 11:15:37,488 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 11:15:37,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:37,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:37,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:37,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:37,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:37,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:37,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:37,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:37,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:37,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:37,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:37,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:37,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:37,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:37,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:37,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:37,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:37,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:38,043 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2019-11-20 11:15:38,043 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616494904] [2019-11-20 11:15:38,043 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2097035496] [2019-11-20 11:15:38,043 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0993bb2a-6438-4a75-b6db-2dbd6d1a54cf/bin/uautomizer/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 11:15:38,110 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-20 11:15:38,110 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 11:15:38,112 INFO L255 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 36 conjunts are in the unsatisfiable core [2019-11-20 11:15:38,114 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 11:15:38,155 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2019-11-20 11:15:38,156 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 11:15:38,156 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2019-11-20 11:15:38,156 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53688907] [2019-11-20 11:15:38,157 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-11-20 11:15:38,157 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 11:15:38,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-11-20 11:15:38,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=284, Unknown=0, NotChecked=0, Total=462 [2019-11-20 11:15:38,158 INFO L87 Difference]: Start difference. First operand 59 states and 60 transitions. Second operand 22 states. [2019-11-20 11:15:38,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 11:15:38,429 INFO L93 Difference]: Finished difference Result 66 states and 67 transitions. [2019-11-20 11:15:38,429 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-11-20 11:15:38,429 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 105 [2019-11-20 11:15:38,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 11:15:38,430 INFO L225 Difference]: With dead ends: 66 [2019-11-20 11:15:38,430 INFO L226 Difference]: Without dead ends: 62 [2019-11-20 11:15:38,431 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=535, Invalid=947, Unknown=0, NotChecked=0, Total=1482 [2019-11-20 11:15:38,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2019-11-20 11:15:38,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2019-11-20 11:15:38,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2019-11-20 11:15:38,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 63 transitions. [2019-11-20 11:15:38,436 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 63 transitions. Word has length 105 [2019-11-20 11:15:38,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 11:15:38,436 INFO L462 AbstractCegarLoop]: Abstraction has 62 states and 63 transitions. [2019-11-20 11:15:38,437 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-11-20 11:15:38,437 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 63 transitions. [2019-11-20 11:15:38,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2019-11-20 11:15:38,438 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 11:15:38,438 INFO L410 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 11:15:38,638 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 11:15:38,638 INFO L410 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 11:15:38,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 11:15:38,639 INFO L82 PathProgramCache]: Analyzing trace with hash 2109441939, now seen corresponding path program 17 times [2019-11-20 11:15:38,639 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 11:15:38,639 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89420990] [2019-11-20 11:15:38,639 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 11:15:38,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:38,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:38,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:38,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:38,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:38,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:38,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:38,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:38,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:38,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:38,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:39,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:39,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:39,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:39,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:39,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:39,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:39,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:39,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:39,287 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2019-11-20 11:15:39,287 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89420990] [2019-11-20 11:15:39,287 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [315899592] [2019-11-20 11:15:39,287 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0993bb2a-6438-4a75-b6db-2dbd6d1a54cf/bin/uautomizer/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 11:15:39,363 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2019-11-20 11:15:39,363 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 11:15:39,365 INFO L255 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 38 conjunts are in the unsatisfiable core [2019-11-20 11:15:39,367 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 11:15:39,419 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2019-11-20 11:15:39,419 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 11:15:39,419 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2019-11-20 11:15:39,419 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600856265] [2019-11-20 11:15:39,422 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-11-20 11:15:39,422 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 11:15:39,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-11-20 11:15:39,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=309, Unknown=0, NotChecked=0, Total=506 [2019-11-20 11:15:39,423 INFO L87 Difference]: Start difference. First operand 62 states and 63 transitions. Second operand 23 states. [2019-11-20 11:15:39,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 11:15:39,707 INFO L93 Difference]: Finished difference Result 69 states and 70 transitions. [2019-11-20 11:15:39,707 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-11-20 11:15:39,708 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 111 [2019-11-20 11:15:39,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 11:15:39,709 INFO L225 Difference]: With dead ends: 69 [2019-11-20 11:15:39,709 INFO L226 Difference]: Without dead ends: 65 [2019-11-20 11:15:39,710 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=593, Invalid=1047, Unknown=0, NotChecked=0, Total=1640 [2019-11-20 11:15:39,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2019-11-20 11:15:39,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2019-11-20 11:15:39,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2019-11-20 11:15:39,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 66 transitions. [2019-11-20 11:15:39,715 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 66 transitions. Word has length 111 [2019-11-20 11:15:39,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 11:15:39,715 INFO L462 AbstractCegarLoop]: Abstraction has 65 states and 66 transitions. [2019-11-20 11:15:39,716 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-11-20 11:15:39,716 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 66 transitions. [2019-11-20 11:15:39,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2019-11-20 11:15:39,717 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 11:15:39,717 INFO L410 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 11:15:39,925 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 11:15:39,925 INFO L410 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 11:15:39,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 11:15:39,925 INFO L82 PathProgramCache]: Analyzing trace with hash 450642089, now seen corresponding path program 18 times [2019-11-20 11:15:39,925 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 11:15:39,925 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94395869] [2019-11-20 11:15:39,925 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 11:15:39,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:39,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:40,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:40,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:40,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:40,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:40,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:40,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:40,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:40,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:40,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:40,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:40,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:40,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:40,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:40,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:40,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:40,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:40,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:40,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:40,621 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2019-11-20 11:15:40,621 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94395869] [2019-11-20 11:15:40,622 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [730720204] [2019-11-20 11:15:40,622 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0993bb2a-6438-4a75-b6db-2dbd6d1a54cf/bin/uautomizer/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 11:15:40,708 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2019-11-20 11:15:40,709 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 11:15:40,710 INFO L255 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 40 conjunts are in the unsatisfiable core [2019-11-20 11:15:40,713 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 11:15:40,807 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2019-11-20 11:15:40,808 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 11:15:40,808 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2019-11-20 11:15:40,808 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188400329] [2019-11-20 11:15:40,809 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-11-20 11:15:40,809 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 11:15:40,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-11-20 11:15:40,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=335, Unknown=0, NotChecked=0, Total=552 [2019-11-20 11:15:40,810 INFO L87 Difference]: Start difference. First operand 65 states and 66 transitions. Second operand 24 states. [2019-11-20 11:15:41,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 11:15:41,043 INFO L93 Difference]: Finished difference Result 72 states and 73 transitions. [2019-11-20 11:15:41,043 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-11-20 11:15:41,044 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 117 [2019-11-20 11:15:41,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 11:15:41,045 INFO L225 Difference]: With dead ends: 72 [2019-11-20 11:15:41,045 INFO L226 Difference]: Without dead ends: 68 [2019-11-20 11:15:41,046 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 342 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=654, Invalid=1152, Unknown=0, NotChecked=0, Total=1806 [2019-11-20 11:15:41,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2019-11-20 11:15:41,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2019-11-20 11:15:41,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2019-11-20 11:15:41,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 69 transitions. [2019-11-20 11:15:41,050 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 69 transitions. Word has length 117 [2019-11-20 11:15:41,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 11:15:41,051 INFO L462 AbstractCegarLoop]: Abstraction has 68 states and 69 transitions. [2019-11-20 11:15:41,051 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-11-20 11:15:41,051 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 69 transitions. [2019-11-20 11:15:41,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2019-11-20 11:15:41,052 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 11:15:41,052 INFO L410 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 11:15:41,255 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 11:15:41,255 INFO L410 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 11:15:41,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 11:15:41,256 INFO L82 PathProgramCache]: Analyzing trace with hash -1141244269, now seen corresponding path program 19 times [2019-11-20 11:15:41,256 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 11:15:41,256 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604079090] [2019-11-20 11:15:41,256 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 11:15:41,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:41,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:41,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:41,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:41,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:41,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:41,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:41,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:41,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:41,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:41,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:41,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:41,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:41,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:41,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:41,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:41,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:41,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:41,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:41,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:41,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:42,031 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2019-11-20 11:15:42,031 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604079090] [2019-11-20 11:15:42,031 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [624695348] [2019-11-20 11:15:42,032 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0993bb2a-6438-4a75-b6db-2dbd6d1a54cf/bin/uautomizer/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 11:15:42,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:42,098 INFO L255 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 42 conjunts are in the unsatisfiable core [2019-11-20 11:15:42,101 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 11:15:42,146 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2019-11-20 11:15:42,146 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 11:15:42,146 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2019-11-20 11:15:42,147 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142848572] [2019-11-20 11:15:42,147 INFO L442 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-11-20 11:15:42,147 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 11:15:42,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-11-20 11:15:42,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=238, Invalid=362, Unknown=0, NotChecked=0, Total=600 [2019-11-20 11:15:42,148 INFO L87 Difference]: Start difference. First operand 68 states and 69 transitions. Second operand 25 states. [2019-11-20 11:15:42,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 11:15:42,452 INFO L93 Difference]: Finished difference Result 75 states and 76 transitions. [2019-11-20 11:15:42,452 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-11-20 11:15:42,452 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 123 [2019-11-20 11:15:42,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 11:15:42,453 INFO L225 Difference]: With dead ends: 75 [2019-11-20 11:15:42,453 INFO L226 Difference]: Without dead ends: 71 [2019-11-20 11:15:42,454 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 380 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=718, Invalid=1262, Unknown=0, NotChecked=0, Total=1980 [2019-11-20 11:15:42,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2019-11-20 11:15:42,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2019-11-20 11:15:42,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2019-11-20 11:15:42,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 72 transitions. [2019-11-20 11:15:42,459 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 72 transitions. Word has length 123 [2019-11-20 11:15:42,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 11:15:42,459 INFO L462 AbstractCegarLoop]: Abstraction has 71 states and 72 transitions. [2019-11-20 11:15:42,459 INFO L463 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-11-20 11:15:42,460 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 72 transitions. [2019-11-20 11:15:42,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2019-11-20 11:15:42,461 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 11:15:42,461 INFO L410 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 11:15:42,664 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 11:15:42,664 INFO L410 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 11:15:42,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 11:15:42,664 INFO L82 PathProgramCache]: Analyzing trace with hash -1280276695, now seen corresponding path program 20 times [2019-11-20 11:15:42,664 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 11:15:42,664 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660826850] [2019-11-20 11:15:42,665 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 11:15:42,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:42,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:42,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:42,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:42,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:42,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:42,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:42,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:42,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:42,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:43,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:43,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:43,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:43,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:43,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:43,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:43,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:43,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:43,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:43,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:43,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:43,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:43,448 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 0 proven. 610 refuted. 0 times theorem prover too weak. 610 trivial. 0 not checked. [2019-11-20 11:15:43,449 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660826850] [2019-11-20 11:15:43,449 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1111964037] [2019-11-20 11:15:43,449 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0993bb2a-6438-4a75-b6db-2dbd6d1a54cf/bin/uautomizer/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 11:15:43,523 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-20 11:15:43,523 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 11:15:43,525 INFO L255 TraceCheckSpWp]: Trace formula consists of 388 conjuncts, 44 conjunts are in the unsatisfiable core [2019-11-20 11:15:43,527 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 11:15:43,576 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 0 proven. 610 refuted. 0 times theorem prover too weak. 610 trivial. 0 not checked. [2019-11-20 11:15:43,576 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 11:15:43,576 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2019-11-20 11:15:43,577 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392102952] [2019-11-20 11:15:43,577 INFO L442 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-11-20 11:15:43,577 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 11:15:43,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-11-20 11:15:43,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=260, Invalid=390, Unknown=0, NotChecked=0, Total=650 [2019-11-20 11:15:43,578 INFO L87 Difference]: Start difference. First operand 71 states and 72 transitions. Second operand 26 states. [2019-11-20 11:15:43,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 11:15:43,840 INFO L93 Difference]: Finished difference Result 78 states and 79 transitions. [2019-11-20 11:15:43,841 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-11-20 11:15:43,841 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 129 [2019-11-20 11:15:43,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 11:15:43,842 INFO L225 Difference]: With dead ends: 78 [2019-11-20 11:15:43,842 INFO L226 Difference]: Without dead ends: 74 [2019-11-20 11:15:43,843 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 169 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 420 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=785, Invalid=1377, Unknown=0, NotChecked=0, Total=2162 [2019-11-20 11:15:43,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2019-11-20 11:15:43,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2019-11-20 11:15:43,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2019-11-20 11:15:43,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 75 transitions. [2019-11-20 11:15:43,851 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 75 transitions. Word has length 129 [2019-11-20 11:15:43,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 11:15:43,851 INFO L462 AbstractCegarLoop]: Abstraction has 74 states and 75 transitions. [2019-11-20 11:15:43,851 INFO L463 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-11-20 11:15:43,852 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 75 transitions. [2019-11-20 11:15:43,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2019-11-20 11:15:43,853 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 11:15:43,853 INFO L410 BasicCegarLoop]: trace histogram [22, 22, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 11:15:44,057 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 11:15:44,057 INFO L410 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 11:15:44,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 11:15:44,057 INFO L82 PathProgramCache]: Analyzing trace with hash -1463802477, now seen corresponding path program 21 times [2019-11-20 11:15:44,058 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 11:15:44,058 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823880013] [2019-11-20 11:15:44,058 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 11:15:44,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:44,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:44,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:44,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:44,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:44,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:44,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:44,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:44,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:44,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:44,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:44,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:44,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:44,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:44,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:44,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:44,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:44,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:44,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:44,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:44,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:44,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:44,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:44,921 INFO L134 CoverageAnalysis]: Checked inductivity of 1344 backedges. 0 proven. 672 refuted. 0 times theorem prover too weak. 672 trivial. 0 not checked. [2019-11-20 11:15:44,921 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823880013] [2019-11-20 11:15:44,921 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1780291683] [2019-11-20 11:15:44,921 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0993bb2a-6438-4a75-b6db-2dbd6d1a54cf/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 [2019-11-20 11:15:45,002 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2019-11-20 11:15:45,002 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 11:15:45,004 INFO L255 TraceCheckSpWp]: Trace formula consists of 406 conjuncts, 46 conjunts are in the unsatisfiable core [2019-11-20 11:15:45,006 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 11:15:45,069 INFO L134 CoverageAnalysis]: Checked inductivity of 1344 backedges. 0 proven. 672 refuted. 0 times theorem prover too weak. 672 trivial. 0 not checked. [2019-11-20 11:15:45,070 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 11:15:45,070 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2019-11-20 11:15:45,070 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118503516] [2019-11-20 11:15:45,071 INFO L442 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-11-20 11:15:45,071 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 11:15:45,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-11-20 11:15:45,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=283, Invalid=419, Unknown=0, NotChecked=0, Total=702 [2019-11-20 11:15:45,072 INFO L87 Difference]: Start difference. First operand 74 states and 75 transitions. Second operand 27 states. [2019-11-20 11:15:45,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 11:15:45,385 INFO L93 Difference]: Finished difference Result 81 states and 82 transitions. [2019-11-20 11:15:45,387 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-11-20 11:15:45,387 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 135 [2019-11-20 11:15:45,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 11:15:45,388 INFO L225 Difference]: With dead ends: 81 [2019-11-20 11:15:45,388 INFO L226 Difference]: Without dead ends: 77 [2019-11-20 11:15:45,389 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 177 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 462 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=855, Invalid=1497, Unknown=0, NotChecked=0, Total=2352 [2019-11-20 11:15:45,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2019-11-20 11:15:45,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2019-11-20 11:15:45,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2019-11-20 11:15:45,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 78 transitions. [2019-11-20 11:15:45,393 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 78 transitions. Word has length 135 [2019-11-20 11:15:45,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 11:15:45,393 INFO L462 AbstractCegarLoop]: Abstraction has 77 states and 78 transitions. [2019-11-20 11:15:45,393 INFO L463 AbstractCegarLoop]: Interpolant automaton has 27 states. [2019-11-20 11:15:45,394 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 78 transitions. [2019-11-20 11:15:45,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2019-11-20 11:15:45,395 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 11:15:45,395 INFO L410 BasicCegarLoop]: trace histogram [23, 23, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 11:15:45,598 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 11:15:45,599 INFO L410 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 11:15:45,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 11:15:45,599 INFO L82 PathProgramCache]: Analyzing trace with hash -555819607, now seen corresponding path program 22 times [2019-11-20 11:15:45,599 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 11:15:45,599 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057399496] [2019-11-20 11:15:45,599 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 11:15:45,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:45,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:45,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:45,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:45,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:45,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:45,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:45,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:45,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:45,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:45,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:46,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:46,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:46,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:46,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:46,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:46,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:46,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:46,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:46,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:46,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:46,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:46,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:46,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:46,549 INFO L134 CoverageAnalysis]: Checked inductivity of 1474 backedges. 0 proven. 737 refuted. 0 times theorem prover too weak. 737 trivial. 0 not checked. [2019-11-20 11:15:46,550 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057399496] [2019-11-20 11:15:46,550 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1616067301] [2019-11-20 11:15:46,550 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0993bb2a-6438-4a75-b6db-2dbd6d1a54cf/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 [2019-11-20 11:15:46,607 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-20 11:15:46,607 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 11:15:46,609 INFO L255 TraceCheckSpWp]: Trace formula consists of 424 conjuncts, 48 conjunts are in the unsatisfiable core [2019-11-20 11:15:46,612 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 11:15:46,676 INFO L134 CoverageAnalysis]: Checked inductivity of 1474 backedges. 0 proven. 737 refuted. 0 times theorem prover too weak. 737 trivial. 0 not checked. [2019-11-20 11:15:46,676 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 11:15:46,676 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2019-11-20 11:15:46,677 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879381260] [2019-11-20 11:15:46,677 INFO L442 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-11-20 11:15:46,677 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 11:15:46,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-11-20 11:15:46,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=307, Invalid=449, Unknown=0, NotChecked=0, Total=756 [2019-11-20 11:15:46,678 INFO L87 Difference]: Start difference. First operand 77 states and 78 transitions. Second operand 28 states. [2019-11-20 11:15:46,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 11:15:46,965 INFO L93 Difference]: Finished difference Result 84 states and 85 transitions. [2019-11-20 11:15:46,965 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-11-20 11:15:46,965 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 141 [2019-11-20 11:15:46,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 11:15:46,966 INFO L225 Difference]: With dead ends: 84 [2019-11-20 11:15:46,966 INFO L226 Difference]: Without dead ends: 80 [2019-11-20 11:15:46,967 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 506 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=928, Invalid=1622, Unknown=0, NotChecked=0, Total=2550 [2019-11-20 11:15:46,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2019-11-20 11:15:46,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2019-11-20 11:15:46,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2019-11-20 11:15:46,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 81 transitions. [2019-11-20 11:15:46,971 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 81 transitions. Word has length 141 [2019-11-20 11:15:46,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 11:15:46,971 INFO L462 AbstractCegarLoop]: Abstraction has 80 states and 81 transitions. [2019-11-20 11:15:46,971 INFO L463 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-11-20 11:15:46,971 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 81 transitions. [2019-11-20 11:15:46,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2019-11-20 11:15:46,972 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 11:15:46,972 INFO L410 BasicCegarLoop]: trace histogram [24, 24, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 11:15:47,175 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 11:15:47,176 INFO L410 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 11:15:47,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 11:15:47,176 INFO L82 PathProgramCache]: Analyzing trace with hash -945685357, now seen corresponding path program 23 times [2019-11-20 11:15:47,176 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 11:15:47,176 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705820169] [2019-11-20 11:15:47,176 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 11:15:47,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:47,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:47,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:47,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:47,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:47,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:47,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:47,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:47,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:47,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:47,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:47,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:47,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:47,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:47,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:47,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:47,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:47,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:47,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:47,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:47,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:47,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:47,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:47,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:47,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:48,177 INFO L134 CoverageAnalysis]: Checked inductivity of 1610 backedges. 0 proven. 805 refuted. 0 times theorem prover too weak. 805 trivial. 0 not checked. [2019-11-20 11:15:48,178 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705820169] [2019-11-20 11:15:48,178 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [621279185] [2019-11-20 11:15:48,178 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0993bb2a-6438-4a75-b6db-2dbd6d1a54cf/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 [2019-11-20 11:15:48,281 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2019-11-20 11:15:48,282 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 11:15:48,284 INFO L255 TraceCheckSpWp]: Trace formula consists of 442 conjuncts, 50 conjunts are in the unsatisfiable core [2019-11-20 11:15:48,288 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 11:15:48,344 INFO L134 CoverageAnalysis]: Checked inductivity of 1610 backedges. 0 proven. 805 refuted. 0 times theorem prover too weak. 805 trivial. 0 not checked. [2019-11-20 11:15:48,345 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 11:15:48,345 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2019-11-20 11:15:48,345 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581601746] [2019-11-20 11:15:48,346 INFO L442 AbstractCegarLoop]: Interpolant automaton has 29 states [2019-11-20 11:15:48,346 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 11:15:48,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2019-11-20 11:15:48,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=332, Invalid=480, Unknown=0, NotChecked=0, Total=812 [2019-11-20 11:15:48,347 INFO L87 Difference]: Start difference. First operand 80 states and 81 transitions. Second operand 29 states. [2019-11-20 11:15:48,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 11:15:48,610 INFO L93 Difference]: Finished difference Result 87 states and 88 transitions. [2019-11-20 11:15:48,610 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-11-20 11:15:48,610 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 147 [2019-11-20 11:15:48,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 11:15:48,611 INFO L225 Difference]: With dead ends: 87 [2019-11-20 11:15:48,611 INFO L226 Difference]: Without dead ends: 83 [2019-11-20 11:15:48,612 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 193 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 552 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1004, Invalid=1752, Unknown=0, NotChecked=0, Total=2756 [2019-11-20 11:15:48,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2019-11-20 11:15:48,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2019-11-20 11:15:48,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2019-11-20 11:15:48,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 84 transitions. [2019-11-20 11:15:48,616 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 84 transitions. Word has length 147 [2019-11-20 11:15:48,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 11:15:48,617 INFO L462 AbstractCegarLoop]: Abstraction has 83 states and 84 transitions. [2019-11-20 11:15:48,617 INFO L463 AbstractCegarLoop]: Interpolant automaton has 29 states. [2019-11-20 11:15:48,617 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 84 transitions. [2019-11-20 11:15:48,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2019-11-20 11:15:48,618 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 11:15:48,618 INFO L410 BasicCegarLoop]: trace histogram [25, 25, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 11:15:48,821 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 11:15:48,822 INFO L410 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 11:15:48,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 11:15:48,822 INFO L82 PathProgramCache]: Analyzing trace with hash 1588806697, now seen corresponding path program 24 times [2019-11-20 11:15:48,822 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 11:15:48,822 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760836654] [2019-11-20 11:15:48,822 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 11:15:48,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:48,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:48,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:48,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:49,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:49,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:49,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:49,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:49,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:49,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:49,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:49,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:49,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:49,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:49,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:49,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:49,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:49,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:49,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:49,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:49,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:49,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:49,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:49,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:49,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:49,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:49,798 INFO L134 CoverageAnalysis]: Checked inductivity of 1752 backedges. 0 proven. 876 refuted. 0 times theorem prover too weak. 876 trivial. 0 not checked. [2019-11-20 11:15:49,799 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760836654] [2019-11-20 11:15:49,799 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1236995204] [2019-11-20 11:15:49,799 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0993bb2a-6438-4a75-b6db-2dbd6d1a54cf/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 [2019-11-20 11:15:49,879 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2019-11-20 11:15:49,879 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 11:15:49,881 INFO L255 TraceCheckSpWp]: Trace formula consists of 460 conjuncts, 52 conjunts are in the unsatisfiable core [2019-11-20 11:15:49,883 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 11:15:49,955 INFO L134 CoverageAnalysis]: Checked inductivity of 1752 backedges. 0 proven. 876 refuted. 0 times theorem prover too weak. 876 trivial. 0 not checked. [2019-11-20 11:15:49,955 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 11:15:49,956 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2019-11-20 11:15:49,956 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446786063] [2019-11-20 11:15:49,956 INFO L442 AbstractCegarLoop]: Interpolant automaton has 30 states [2019-11-20 11:15:49,957 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 11:15:49,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2019-11-20 11:15:49,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=358, Invalid=512, Unknown=0, NotChecked=0, Total=870 [2019-11-20 11:15:49,958 INFO L87 Difference]: Start difference. First operand 83 states and 84 transitions. Second operand 30 states. [2019-11-20 11:15:50,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 11:15:50,320 INFO L93 Difference]: Finished difference Result 90 states and 91 transitions. [2019-11-20 11:15:50,320 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-11-20 11:15:50,320 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 153 [2019-11-20 11:15:50,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 11:15:50,321 INFO L225 Difference]: With dead ends: 90 [2019-11-20 11:15:50,322 INFO L226 Difference]: Without dead ends: 86 [2019-11-20 11:15:50,323 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 201 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 600 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1083, Invalid=1887, Unknown=0, NotChecked=0, Total=2970 [2019-11-20 11:15:50,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2019-11-20 11:15:50,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2019-11-20 11:15:50,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2019-11-20 11:15:50,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 87 transitions. [2019-11-20 11:15:50,329 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 87 transitions. Word has length 153 [2019-11-20 11:15:50,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 11:15:50,329 INFO L462 AbstractCegarLoop]: Abstraction has 86 states and 87 transitions. [2019-11-20 11:15:50,329 INFO L463 AbstractCegarLoop]: Interpolant automaton has 30 states. [2019-11-20 11:15:50,330 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 87 transitions. [2019-11-20 11:15:50,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2019-11-20 11:15:50,331 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 11:15:50,331 INFO L410 BasicCegarLoop]: trace histogram [26, 26, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 11:15:50,534 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 11:15:50,534 INFO L410 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 11:15:50,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 11:15:50,534 INFO L82 PathProgramCache]: Analyzing trace with hash 959677331, now seen corresponding path program 25 times [2019-11-20 11:15:50,535 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 11:15:50,535 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635892199] [2019-11-20 11:15:50,535 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 11:15:50,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:50,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:50,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:50,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:51,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:51,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:51,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:51,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:51,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:51,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:51,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:51,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:51,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:51,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:52,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:52,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:52,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:52,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:52,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:52,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:52,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:52,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:52,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:53,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:53,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:53,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:53,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:53,957 INFO L134 CoverageAnalysis]: Checked inductivity of 1900 backedges. 924 proven. 50 refuted. 0 times theorem prover too weak. 926 trivial. 0 not checked. [2019-11-20 11:15:53,958 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635892199] [2019-11-20 11:15:53,958 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284699351] [2019-11-20 11:15:53,958 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0993bb2a-6438-4a75-b6db-2dbd6d1a54cf/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 [2019-11-20 11:15:54,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:15:54,027 WARN L253 TraceCheckSpWp]: Trace formula consists of 478 conjuncts, 267 conjunts are in the unsatisfiable core [2019-11-20 11:15:54,031 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 11:15:54,407 INFO L134 CoverageAnalysis]: Checked inductivity of 1900 backedges. 949 proven. 50 refuted. 0 times theorem prover too weak. 901 trivial. 0 not checked. [2019-11-20 11:15:54,407 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 11:15:54,407 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 59] total 63 [2019-11-20 11:15:54,407 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059766281] [2019-11-20 11:15:54,408 INFO L442 AbstractCegarLoop]: Interpolant automaton has 63 states [2019-11-20 11:15:54,408 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 11:15:54,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2019-11-20 11:15:54,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=732, Invalid=3174, Unknown=0, NotChecked=0, Total=3906 [2019-11-20 11:15:54,409 INFO L87 Difference]: Start difference. First operand 86 states and 87 transitions. Second operand 63 states. [2019-11-20 11:15:57,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 11:15:57,468 INFO L93 Difference]: Finished difference Result 86 states and 87 transitions. [2019-11-20 11:15:57,468 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2019-11-20 11:15:57,468 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 159 [2019-11-20 11:15:57,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 11:15:57,469 INFO L225 Difference]: With dead ends: 86 [2019-11-20 11:15:57,469 INFO L226 Difference]: Without dead ends: 0 [2019-11-20 11:15:57,473 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 317 GetRequests, 204 SyntacticMatches, 1 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1734 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=2288, Invalid=10594, Unknown=0, NotChecked=0, Total=12882 [2019-11-20 11:15:57,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-11-20 11:15:57,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-11-20 11:15:57,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-11-20 11:15:57,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-11-20 11:15:57,474 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 159 [2019-11-20 11:15:57,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 11:15:57,474 INFO L462 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-11-20 11:15:57,474 INFO L463 AbstractCegarLoop]: Interpolant automaton has 63 states. [2019-11-20 11:15:57,475 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-11-20 11:15:57,475 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-11-20 11:15:57,679 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 11:15:57,682 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2019-11-20 11:15:57,709 INFO L444 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2019-11-20 11:15:57,709 INFO L444 ceAbstractionStarter]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2019-11-20 11:15:57,709 INFO L444 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2019-11-20 11:15:57,710 INFO L444 ceAbstractionStarter]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 16) no Hoare annotation was computed. [2019-11-20 11:15:57,710 INFO L444 ceAbstractionStarter]: For program point L16(line 16) no Hoare annotation was computed. [2019-11-20 11:15:57,710 INFO L444 ceAbstractionStarter]: For program point L15(lines 15 17) no Hoare annotation was computed. [2019-11-20 11:15:57,710 INFO L440 ceAbstractionStarter]: At program point L14(line 14) the Hoare annotation is: (and (<= ULTIMATE.start_main_~a~0 25) (<= 25 ULTIMATE.start_main_~a~0)) [2019-11-20 11:15:57,710 INFO L444 ceAbstractionStarter]: For program point L14-1(line 14) no Hoare annotation was computed. [2019-11-20 11:15:57,710 INFO L444 ceAbstractionStarter]: For program point L11(lines 11 18) no Hoare annotation was computed. [2019-11-20 11:15:57,710 INFO L444 ceAbstractionStarter]: For program point sumEXIT(lines 3 9) no Hoare annotation was computed. [2019-11-20 11:15:57,710 INFO L440 ceAbstractionStarter]: At program point L7(line 7) the Hoare annotation is: (and (= sum_~m |sum_#in~m|) (= sum_~n |sum_#in~n|) (<= 1 sum_~n)) [2019-11-20 11:15:57,711 INFO L444 ceAbstractionStarter]: For program point L7-1(line 7) no Hoare annotation was computed. [2019-11-20 11:15:57,711 INFO L444 ceAbstractionStarter]: For program point L4(lines 4 8) no Hoare annotation was computed. [2019-11-20 11:15:57,711 INFO L444 ceAbstractionStarter]: For program point sumFINAL(lines 3 9) no Hoare annotation was computed. [2019-11-20 11:15:57,711 INFO L447 ceAbstractionStarter]: At program point sumENTRY(lines 3 9) the Hoare annotation is: true [2019-11-20 11:15:57,713 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.11 11:15:57 BoogieIcfgContainer [2019-11-20 11:15:57,713 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-20 11:15:57,713 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-20 11:15:57,714 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-20 11:15:57,714 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-20 11:15:57,714 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:15:25" (3/4) ... [2019-11-20 11:15:57,717 INFO L137 WitnessPrinter]: Generating witness for correct program [2019-11-20 11:15:57,723 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure sum [2019-11-20 11:15:57,726 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2019-11-20 11:15:57,726 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2019-11-20 11:15:57,756 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_0993bb2a-6438-4a75-b6db-2dbd6d1a54cf/bin/uautomizer/witness.graphml [2019-11-20 11:15:57,757 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-20 11:15:57,758 INFO L168 Benchmark]: Toolchain (without parser) took 32480.61 ms. Allocated memory was 1.0 GB in the beginning and 1.7 GB in the end (delta: 667.4 MB). Free memory was 950.1 MB in the beginning and 1.3 GB in the end (delta: -368.8 MB). Peak memory consumption was 298.6 MB. Max. memory is 11.5 GB. [2019-11-20 11:15:57,759 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 1.0 GB. Free memory is still 967.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-20 11:15:57,759 INFO L168 Benchmark]: CACSL2BoogieTranslator took 307.94 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 180.9 MB). Free memory was 950.1 MB in the beginning and 1.2 GB in the end (delta: -228.3 MB). Peak memory consumption was 23.1 MB. Max. memory is 11.5 GB. [2019-11-20 11:15:57,760 INFO L168 Benchmark]: Boogie Procedure Inliner took 28.14 ms. Allocated memory is still 1.2 GB. Free memory is still 1.2 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-20 11:15:57,760 INFO L168 Benchmark]: Boogie Preprocessor took 16.52 ms. Allocated memory is still 1.2 GB. Free memory is still 1.2 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-20 11:15:57,760 INFO L168 Benchmark]: RCFGBuilder took 203.85 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 19.7 MB). Peak memory consumption was 19.7 MB. Max. memory is 11.5 GB. [2019-11-20 11:15:57,761 INFO L168 Benchmark]: TraceAbstraction took 31874.26 ms. Allocated memory was 1.2 GB in the beginning and 1.7 GB in the end (delta: 486.5 MB). Free memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: -165.3 MB). Peak memory consumption was 321.2 MB. Max. memory is 11.5 GB. [2019-11-20 11:15:57,761 INFO L168 Benchmark]: Witness Printer took 43.36 ms. Allocated memory is still 1.7 GB. Free memory was 1.3 GB in the beginning and 1.3 GB in the end (delta: 5.1 MB). Peak memory consumption was 5.1 MB. Max. memory is 11.5 GB. [2019-11-20 11:15:57,763 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 1.0 GB. Free memory is still 967.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 307.94 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 180.9 MB). Free memory was 950.1 MB in the beginning and 1.2 GB in the end (delta: -228.3 MB). Peak memory consumption was 23.1 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 28.14 ms. Allocated memory is still 1.2 GB. Free memory is still 1.2 GB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 16.52 ms. Allocated memory is still 1.2 GB. Free memory is still 1.2 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 203.85 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 19.7 MB). Peak memory consumption was 19.7 MB. Max. memory is 11.5 GB. * TraceAbstraction took 31874.26 ms. Allocated memory was 1.2 GB in the beginning and 1.7 GB in the end (delta: 486.5 MB). Free memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: -165.3 MB). Peak memory consumption was 321.2 MB. Max. memory is 11.5 GB. * Witness Printer took 43.36 ms. Allocated memory is still 1.7 GB. Free memory was 1.3 GB in the beginning and 1.3 GB in the end (delta: 5.1 MB). Peak memory consumption was 5.1 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 16]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 15 locations, 1 error locations. Result: SAFE, OverallTime: 31.8s, OverallIterations: 26, TraceHistogramMax: 26, AutomataDifference: 8.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 232 SDtfs, 1022 SDslu, 1554 SDs, 0 SdLazy, 2182 SolverSat, 199 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 3659 GetRequests, 2822 SyntacticMatches, 1 SemanticMatches, 836 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6934 ImplicationChecksByTransitivity, 13.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=86occurred in iteration=25, 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, 26 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 3 LocationsWithAnnotation, 5 PreInvPairs, 5 NumberOfFragments, 18 HoareAnnotationTreeSize, 5 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 3 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 1.1s SatisfiabilityAnalysisTime, 16.0s InterpolantComputationTime, 4359 NumberOfCodeBlocks, 4359 NumberOfCodeBlocksAsserted, 223 NumberOfCheckSat, 4308 ConstructedInterpolants, 0 QuantifiedInterpolants, 1477894 SizeOfPredicates, 403 NumberOfNonLiveVariables, 6550 ConjunctsInSsa, 963 ConjunctsInUnsatCore, 51 InterpolantComputations, 1 PerfectInterpolantSequences, 18700/33800 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...