./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive-simple/sum_20x0-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cad46833 Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_45c9f5b7-cb53-450a-843b-3fff3decde21/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_45c9f5b7-cb53-450a-843b-3fff3decde21/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_45c9f5b7-cb53-450a-843b-3fff3decde21/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_45c9f5b7-cb53-450a-843b-3fff3decde21/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive-simple/sum_20x0-2.c -s /tmp/vcloud-vcloud-master/worker/run_dir_45c9f5b7-cb53-450a-843b-3fff3decde21/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_45c9f5b7-cb53-450a-843b-3fff3decde21/bin/uautomizer --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash f4078ef7bc39da0337b6d8ed5ecbbcec336a37b8 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.24-cad4683 [2019-11-15 23:22:42,037 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-15 23:22:42,039 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-15 23:22:42,057 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-15 23:22:42,057 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-15 23:22:42,059 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-15 23:22:42,061 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-15 23:22:42,071 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-15 23:22:42,075 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-15 23:22:42,078 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-15 23:22:42,079 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-15 23:22:42,080 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-15 23:22:42,080 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-15 23:22:42,081 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-15 23:22:42,082 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-15 23:22:42,083 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-15 23:22:42,083 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-15 23:22:42,084 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-15 23:22:42,086 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-15 23:22:42,087 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-15 23:22:42,089 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-15 23:22:42,093 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-15 23:22:42,096 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-15 23:22:42,097 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-15 23:22:42,102 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-15 23:22:42,103 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-15 23:22:42,103 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-15 23:22:42,105 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-15 23:22:42,106 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-15 23:22:42,107 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-15 23:22:42,108 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-15 23:22:42,108 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-15 23:22:42,109 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-15 23:22:42,110 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-15 23:22:42,113 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-15 23:22:42,113 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-15 23:22:42,114 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-15 23:22:42,114 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-15 23:22:42,114 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-15 23:22:42,115 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-15 23:22:42,115 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-15 23:22:42,116 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_45c9f5b7-cb53-450a-843b-3fff3decde21/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-15 23:22:42,143 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-15 23:22:42,143 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-15 23:22:42,144 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-15 23:22:42,144 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-15 23:22:42,144 INFO L138 SettingsManager]: * Use SBE=true [2019-11-15 23:22:42,145 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-15 23:22:42,145 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-15 23:22:42,145 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-15 23:22:42,145 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-15 23:22:42,145 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-15 23:22:42,146 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-15 23:22:42,146 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-15 23:22:42,146 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-15 23:22:42,146 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-15 23:22:42,146 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-15 23:22:42,147 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-15 23:22:42,147 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-15 23:22:42,147 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-15 23:22:42,147 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-15 23:22:42,147 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-15 23:22:42,148 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-15 23:22:42,148 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-15 23:22:42,148 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-15 23:22:42,148 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-15 23:22:42,148 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-15 23:22:42,149 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-15 23:22:42,149 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-15 23:22:42,149 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-15 23:22:42,149 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_45c9f5b7-cb53-450a-843b-3fff3decde21/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f4078ef7bc39da0337b6d8ed5ecbbcec336a37b8 [2019-11-15 23:22:42,196 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-15 23:22:42,212 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-15 23:22:42,216 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-15 23:22:42,217 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-15 23:22:42,218 INFO L275 PluginConnector]: CDTParser initialized [2019-11-15 23:22:42,219 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_45c9f5b7-cb53-450a-843b-3fff3decde21/bin/uautomizer/../../sv-benchmarks/c/recursive-simple/sum_20x0-2.c [2019-11-15 23:22:42,286 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_45c9f5b7-cb53-450a-843b-3fff3decde21/bin/uautomizer/data/c815d464f/7e67c0f3787e4ee7afbdb418346cd207/FLAGe78d15414 [2019-11-15 23:22:42,676 INFO L306 CDTParser]: Found 1 translation units. [2019-11-15 23:22:42,677 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_45c9f5b7-cb53-450a-843b-3fff3decde21/sv-benchmarks/c/recursive-simple/sum_20x0-2.c [2019-11-15 23:22:42,682 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_45c9f5b7-cb53-450a-843b-3fff3decde21/bin/uautomizer/data/c815d464f/7e67c0f3787e4ee7afbdb418346cd207/FLAGe78d15414 [2019-11-15 23:22:43,123 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_45c9f5b7-cb53-450a-843b-3fff3decde21/bin/uautomizer/data/c815d464f/7e67c0f3787e4ee7afbdb418346cd207 [2019-11-15 23:22:43,126 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-15 23:22:43,127 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-15 23:22:43,128 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-15 23:22:43,128 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-15 23:22:43,132 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-15 23:22:43,133 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.11 11:22:43" (1/1) ... [2019-11-15 23:22:43,135 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@330eb8a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 11:22:43, skipping insertion in model container [2019-11-15 23:22:43,136 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.11 11:22:43" (1/1) ... [2019-11-15 23:22:43,143 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-15 23:22:43,158 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-15 23:22:43,369 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-15 23:22:43,376 INFO L188 MainTranslator]: Completed pre-run [2019-11-15 23:22:43,395 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-15 23:22:43,409 INFO L192 MainTranslator]: Completed translation [2019-11-15 23:22:43,409 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 11:22:43 WrapperNode [2019-11-15 23:22:43,409 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-15 23:22:43,410 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-15 23:22:43,410 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-15 23:22:43,411 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-15 23:22:43,419 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 11:22:43" (1/1) ... [2019-11-15 23:22:43,424 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 11:22:43" (1/1) ... [2019-11-15 23:22:43,441 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-15 23:22:43,441 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-15 23:22:43,441 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-15 23:22:43,441 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-15 23:22:43,450 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 11:22:43" (1/1) ... [2019-11-15 23:22:43,451 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 11:22:43" (1/1) ... [2019-11-15 23:22:43,451 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 11:22:43" (1/1) ... [2019-11-15 23:22:43,451 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 11:22:43" (1/1) ... [2019-11-15 23:22:43,453 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 11:22:43" (1/1) ... [2019-11-15 23:22:43,455 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 11:22:43" (1/1) ... [2019-11-15 23:22:43,456 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 11:22:43" (1/1) ... [2019-11-15 23:22:43,457 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-15 23:22:43,458 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-15 23:22:43,458 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-15 23:22:43,458 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-15 23:22:43,459 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 11:22:43" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_45c9f5b7-cb53-450a-843b-3fff3decde21/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 [2019-11-15 23:22:43,525 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-15 23:22:43,526 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-15 23:22:43,526 INFO L130 BoogieDeclarations]: Found specification of procedure sum [2019-11-15 23:22:43,527 INFO L138 BoogieDeclarations]: Found implementation of procedure sum [2019-11-15 23:22:43,701 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-15 23:22:43,701 INFO L284 CfgBuilder]: Removed 4 assume(true) statements. [2019-11-15 23:22:43,702 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.11 11:22:43 BoogieIcfgContainer [2019-11-15 23:22:43,702 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-15 23:22:43,703 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-15 23:22:43,703 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-15 23:22:43,706 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-15 23:22:43,707 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.11 11:22:43" (1/3) ... [2019-11-15 23:22:43,708 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73413699 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.11 11:22:43, skipping insertion in model container [2019-11-15 23:22:43,708 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 11:22:43" (2/3) ... [2019-11-15 23:22:43,708 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73413699 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.11 11:22:43, skipping insertion in model container [2019-11-15 23:22:43,708 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.11 11:22:43" (3/3) ... [2019-11-15 23:22:43,711 INFO L109 eAbstractionObserver]: Analyzing ICFG sum_20x0-2.c [2019-11-15 23:22:43,720 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-15 23:22:43,728 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-15 23:22:43,743 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-15 23:22:43,776 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-15 23:22:43,776 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-15 23:22:43,776 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-15 23:22:43,776 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-15 23:22:43,777 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-15 23:22:43,777 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-15 23:22:43,777 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-15 23:22:43,778 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-15 23:22:43,798 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states. [2019-11-15 23:22:43,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-11-15 23:22:43,803 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 23:22:43,804 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 23:22:43,806 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 23:22:43,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 23:22:43,812 INFO L82 PathProgramCache]: Analyzing trace with hash 389977641, now seen corresponding path program 1 times [2019-11-15 23:22:43,820 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 23:22:43,821 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692128286] [2019-11-15 23:22:43,821 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:22:43,821 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:22:43,821 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 23:22:43,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:22:44,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:22:44,045 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 23:22:44,046 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692128286] [2019-11-15 23:22:44,047 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-15 23:22:44,047 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-15 23:22:44,047 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118343490] [2019-11-15 23:22:44,051 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-15 23:22:44,052 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 23:22:44,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-15 23:22:44,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-15 23:22:44,068 INFO L87 Difference]: Start difference. First operand 15 states. Second operand 5 states. [2019-11-15 23:22:44,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 23:22:44,161 INFO L93 Difference]: Finished difference Result 24 states and 27 transitions. [2019-11-15 23:22:44,162 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-15 23:22:44,163 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2019-11-15 23:22:44,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 23:22:44,173 INFO L225 Difference]: With dead ends: 24 [2019-11-15 23:22:44,173 INFO L226 Difference]: Without dead ends: 14 [2019-11-15 23:22:44,192 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-15 23:22:44,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2019-11-15 23:22:44,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2019-11-15 23:22:44,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2019-11-15 23:22:44,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2019-11-15 23:22:44,228 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 9 [2019-11-15 23:22:44,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 23:22:44,229 INFO L462 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2019-11-15 23:22:44,229 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-15 23:22:44,229 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2019-11-15 23:22:44,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-15 23:22:44,230 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 23:22:44,231 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 23:22:44,231 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 23:22:44,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 23:22:44,231 INFO L82 PathProgramCache]: Analyzing trace with hash -881029229, now seen corresponding path program 1 times [2019-11-15 23:22:44,231 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 23:22:44,232 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622759103] [2019-11-15 23:22:44,232 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:22:44,232 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:22:44,232 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 23:22:44,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:22:44,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:22:44,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:22:44,350 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-15 23:22:44,351 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622759103] [2019-11-15 23:22:44,351 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1709583455] [2019-11-15 23:22:44,351 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_45c9f5b7-cb53-450a-843b-3fff3decde21/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 [2019-11-15 23:22:44,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:22:44,399 INFO L256 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-15 23:22:44,405 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 23:22:44,451 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-15 23:22:44,451 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 23:22:44,452 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2019-11-15 23:22:44,452 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632990458] [2019-11-15 23:22:44,453 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-15 23:22:44,454 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 23:22:44,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-15 23:22:44,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-11-15 23:22:44,454 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 7 states. [2019-11-15 23:22:44,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 23:22:44,533 INFO L93 Difference]: Finished difference Result 21 states and 22 transitions. [2019-11-15 23:22:44,534 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-15 23:22:44,534 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 15 [2019-11-15 23:22:44,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 23:22:44,535 INFO L225 Difference]: With dead ends: 21 [2019-11-15 23:22:44,535 INFO L226 Difference]: Without dead ends: 17 [2019-11-15 23:22:44,536 INFO L600 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 [2019-11-15 23:22:44,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2019-11-15 23:22:44,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2019-11-15 23:22:44,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-11-15 23:22:44,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2019-11-15 23:22:44,541 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 15 [2019-11-15 23:22:44,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 23:22:44,541 INFO L462 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2019-11-15 23:22:44,541 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-15 23:22:44,541 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2019-11-15 23:22:44,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-11-15 23:22:44,542 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 23:22:44,542 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 23:22:44,747 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 23:22:44,748 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 23:22:44,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 23:22:44,748 INFO L82 PathProgramCache]: Analyzing trace with hash -1824240471, now seen corresponding path program 2 times [2019-11-15 23:22:44,748 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 23:22:44,748 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809968120] [2019-11-15 23:22:44,749 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:22:44,749 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:22:44,749 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 23:22:44,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:22:44,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:22:44,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:22:44,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:22:44,939 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-11-15 23:22:44,939 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809968120] [2019-11-15 23:22:44,939 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1988020223] [2019-11-15 23:22:44,939 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_45c9f5b7-cb53-450a-843b-3fff3decde21/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 [2019-11-15 23:22:44,984 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-15 23:22:44,984 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-15 23:22:44,993 INFO L256 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-15 23:22:44,995 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 23:22:45,027 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-11-15 23:22:45,027 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 23:22:45,027 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2019-11-15 23:22:45,028 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664952530] [2019-11-15 23:22:45,028 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-15 23:22:45,028 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 23:22:45,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-15 23:22:45,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-11-15 23:22:45,029 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 8 states. [2019-11-15 23:22:45,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 23:22:45,104 INFO L93 Difference]: Finished difference Result 24 states and 25 transitions. [2019-11-15 23:22:45,104 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-15 23:22:45,105 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 21 [2019-11-15 23:22:45,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 23:22:45,106 INFO L225 Difference]: With dead ends: 24 [2019-11-15 23:22:45,106 INFO L226 Difference]: Without dead ends: 20 [2019-11-15 23:22:45,106 INFO L600 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 [2019-11-15 23:22:45,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-11-15 23:22:45,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2019-11-15 23:22:45,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-11-15 23:22:45,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2019-11-15 23:22:45,112 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 21 [2019-11-15 23:22:45,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 23:22:45,112 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2019-11-15 23:22:45,112 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-15 23:22:45,112 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2019-11-15 23:22:45,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-11-15 23:22:45,113 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 23:22:45,114 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 23:22:45,317 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 23:22:45,318 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 23:22:45,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 23:22:45,318 INFO L82 PathProgramCache]: Analyzing trace with hash -28473709, now seen corresponding path program 3 times [2019-11-15 23:22:45,318 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 23:22:45,318 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747092] [2019-11-15 23:22:45,318 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:22:45,319 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:22:45,319 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 23:22:45,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:22:45,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:22:45,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:22:45,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:22:45,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:22:45,498 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-15 23:22:45,499 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747092] [2019-11-15 23:22:45,499 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1331961364] [2019-11-15 23:22:45,499 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_45c9f5b7-cb53-450a-843b-3fff3decde21/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 [2019-11-15 23:22:45,551 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-11-15 23:22:45,552 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-15 23:22:45,552 INFO L256 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-15 23:22:45,558 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 23:22:45,582 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-15 23:22:45,582 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 23:22:45,582 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2019-11-15 23:22:45,582 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430767450] [2019-11-15 23:22:45,583 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-15 23:22:45,583 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 23:22:45,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-15 23:22:45,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-11-15 23:22:45,584 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 9 states. [2019-11-15 23:22:45,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 23:22:45,677 INFO L93 Difference]: Finished difference Result 27 states and 28 transitions. [2019-11-15 23:22:45,677 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-15 23:22:45,677 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 27 [2019-11-15 23:22:45,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 23:22:45,678 INFO L225 Difference]: With dead ends: 27 [2019-11-15 23:22:45,679 INFO L226 Difference]: Without dead ends: 23 [2019-11-15 23:22:45,679 INFO L600 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 [2019-11-15 23:22:45,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2019-11-15 23:22:45,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2019-11-15 23:22:45,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-11-15 23:22:45,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2019-11-15 23:22:45,684 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 27 [2019-11-15 23:22:45,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 23:22:45,685 INFO L462 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2019-11-15 23:22:45,685 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-15 23:22:45,685 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2019-11-15 23:22:45,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2019-11-15 23:22:45,686 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 23:22:45,686 INFO L380 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 23:22:45,889 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 23:22:45,889 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 23:22:45,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 23:22:45,890 INFO L82 PathProgramCache]: Analyzing trace with hash -2080894167, now seen corresponding path program 4 times [2019-11-15 23:22:45,890 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 23:22:45,890 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893070951] [2019-11-15 23:22:45,890 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:22:45,890 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:22:45,890 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 23:22:45,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:22:45,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:22:45,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:22:45,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:22:46,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:22:46,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:22:46,071 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2019-11-15 23:22:46,072 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893070951] [2019-11-15 23:22:46,072 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [95298086] [2019-11-15 23:22:46,072 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_45c9f5b7-cb53-450a-843b-3fff3decde21/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 [2019-11-15 23:22:46,120 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-15 23:22:46,121 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-15 23:22:46,122 INFO L256 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-15 23:22:46,128 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 23:22:46,161 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2019-11-15 23:22:46,161 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 23:22:46,161 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2019-11-15 23:22:46,162 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065499829] [2019-11-15 23:22:46,162 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-15 23:22:46,162 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 23:22:46,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-15 23:22:46,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2019-11-15 23:22:46,163 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand 10 states. [2019-11-15 23:22:46,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 23:22:46,252 INFO L93 Difference]: Finished difference Result 30 states and 31 transitions. [2019-11-15 23:22:46,253 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-15 23:22:46,253 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 33 [2019-11-15 23:22:46,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 23:22:46,254 INFO L225 Difference]: With dead ends: 30 [2019-11-15 23:22:46,254 INFO L226 Difference]: Without dead ends: 26 [2019-11-15 23:22:46,255 INFO L600 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 [2019-11-15 23:22:46,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-11-15 23:22:46,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2019-11-15 23:22:46,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-11-15 23:22:46,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2019-11-15 23:22:46,260 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 33 [2019-11-15 23:22:46,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 23:22:46,260 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2019-11-15 23:22:46,260 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-15 23:22:46,261 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2019-11-15 23:22:46,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-11-15 23:22:46,262 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 23:22:46,262 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 23:22:46,465 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 23:22:46,465 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 23:22:46,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 23:22:46,465 INFO L82 PathProgramCache]: Analyzing trace with hash -687460973, now seen corresponding path program 5 times [2019-11-15 23:22:46,466 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 23:22:46,466 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110448848] [2019-11-15 23:22:46,466 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:22:46,466 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:22:46,466 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 23:22:46,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:22:46,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:22:46,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:22:46,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:22:46,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:22:46,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:22:46,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:22:46,682 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2019-11-15 23:22:46,683 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110448848] [2019-11-15 23:22:46,683 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2056809900] [2019-11-15 23:22:46,683 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_45c9f5b7-cb53-450a-843b-3fff3decde21/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 [2019-11-15 23:22:46,726 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2019-11-15 23:22:46,727 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-15 23:22:46,728 INFO L256 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 14 conjunts are in the unsatisfiable core [2019-11-15 23:22:46,731 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 23:22:46,767 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2019-11-15 23:22:46,767 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 23:22:46,767 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2019-11-15 23:22:46,768 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309959269] [2019-11-15 23:22:46,768 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-15 23:22:46,769 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 23:22:46,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-15 23:22:46,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2019-11-15 23:22:46,769 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand 11 states. [2019-11-15 23:22:46,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 23:22:46,883 INFO L93 Difference]: Finished difference Result 33 states and 34 transitions. [2019-11-15 23:22:46,883 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-15 23:22:46,883 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 39 [2019-11-15 23:22:46,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 23:22:46,884 INFO L225 Difference]: With dead ends: 33 [2019-11-15 23:22:46,885 INFO L226 Difference]: Without dead ends: 29 [2019-11-15 23:22:46,885 INFO L600 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 [2019-11-15 23:22:46,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-11-15 23:22:46,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2019-11-15 23:22:46,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-11-15 23:22:46,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2019-11-15 23:22:46,891 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 39 [2019-11-15 23:22:46,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 23:22:46,891 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2019-11-15 23:22:46,891 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-15 23:22:46,891 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2019-11-15 23:22:46,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2019-11-15 23:22:46,893 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 23:22:46,893 INFO L380 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 23:22:47,093 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 23:22:47,094 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 23:22:47,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 23:22:47,095 INFO L82 PathProgramCache]: Analyzing trace with hash 547744169, now seen corresponding path program 6 times [2019-11-15 23:22:47,095 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 23:22:47,095 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761155851] [2019-11-15 23:22:47,095 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:22:47,095 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:22:47,095 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 23:22:47,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:22:47,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:22:47,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:22:47,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:22:47,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:22:47,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:22:47,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:22:47,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:22:47,282 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2019-11-15 23:22:47,282 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761155851] [2019-11-15 23:22:47,282 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [471243640] [2019-11-15 23:22:47,282 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_45c9f5b7-cb53-450a-843b-3fff3decde21/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 [2019-11-15 23:22:47,329 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-11-15 23:22:47,329 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-15 23:22:47,330 INFO L256 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 16 conjunts are in the unsatisfiable core [2019-11-15 23:22:47,333 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 23:22:47,368 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2019-11-15 23:22:47,368 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 23:22:47,368 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2019-11-15 23:22:47,369 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662274857] [2019-11-15 23:22:47,369 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-15 23:22:47,370 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 23:22:47,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-15 23:22:47,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2019-11-15 23:22:47,371 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand 12 states. [2019-11-15 23:22:47,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 23:22:47,505 INFO L93 Difference]: Finished difference Result 36 states and 37 transitions. [2019-11-15 23:22:47,505 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-15 23:22:47,505 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 45 [2019-11-15 23:22:47,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 23:22:47,506 INFO L225 Difference]: With dead ends: 36 [2019-11-15 23:22:47,506 INFO L226 Difference]: Without dead ends: 32 [2019-11-15 23:22:47,507 INFO L600 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 [2019-11-15 23:22:47,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-11-15 23:22:47,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2019-11-15 23:22:47,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-11-15 23:22:47,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2019-11-15 23:22:47,513 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 45 [2019-11-15 23:22:47,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 23:22:47,513 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2019-11-15 23:22:47,513 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-15 23:22:47,513 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2019-11-15 23:22:47,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2019-11-15 23:22:47,515 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 23:22:47,515 INFO L380 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 23:22:47,724 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 23:22:47,725 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 23:22:47,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 23:22:47,725 INFO L82 PathProgramCache]: Analyzing trace with hash -247823213, now seen corresponding path program 7 times [2019-11-15 23:22:47,725 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 23:22:47,725 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619509069] [2019-11-15 23:22:47,725 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:22:47,726 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:22:47,726 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 23:22:47,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:22:47,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:22:47,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:22:47,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:22:47,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:22:47,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:22:47,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:22:47,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:22:47,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:22:47,941 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2019-11-15 23:22:47,942 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619509069] [2019-11-15 23:22:47,942 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1398048745] [2019-11-15 23:22:47,942 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_45c9f5b7-cb53-450a-843b-3fff3decde21/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 [2019-11-15 23:22:47,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:22:47,998 INFO L256 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 18 conjunts are in the unsatisfiable core [2019-11-15 23:22:48,001 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 23:22:48,032 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2019-11-15 23:22:48,037 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 23:22:48,038 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2019-11-15 23:22:48,038 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286657099] [2019-11-15 23:22:48,038 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-15 23:22:48,039 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 23:22:48,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-15 23:22:48,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2019-11-15 23:22:48,040 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand 13 states. [2019-11-15 23:22:48,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 23:22:48,180 INFO L93 Difference]: Finished difference Result 39 states and 40 transitions. [2019-11-15 23:22:48,181 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-15 23:22:48,181 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 51 [2019-11-15 23:22:48,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 23:22:48,182 INFO L225 Difference]: With dead ends: 39 [2019-11-15 23:22:48,182 INFO L226 Difference]: Without dead ends: 35 [2019-11-15 23:22:48,183 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=148, Invalid=272, Unknown=0, NotChecked=0, Total=420 [2019-11-15 23:22:48,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-11-15 23:22:48,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2019-11-15 23:22:48,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-11-15 23:22:48,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2019-11-15 23:22:48,188 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 51 [2019-11-15 23:22:48,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 23:22:48,188 INFO L462 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2019-11-15 23:22:48,189 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-15 23:22:48,189 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2019-11-15 23:22:48,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2019-11-15 23:22:48,190 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 23:22:48,190 INFO L380 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 23:22:48,397 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 23:22:48,398 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 23:22:48,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 23:22:48,398 INFO L82 PathProgramCache]: Analyzing trace with hash -1818636247, now seen corresponding path program 8 times [2019-11-15 23:22:48,398 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 23:22:48,398 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390254720] [2019-11-15 23:22:48,398 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:22:48,398 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:22:48,399 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 23:22:48,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:22:48,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:22:48,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:22:48,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:22:48,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:22:48,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:22:48,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:22:48,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:22:48,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:22:48,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:22:48,640 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2019-11-15 23:22:48,640 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390254720] [2019-11-15 23:22:48,641 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [32476007] [2019-11-15 23:22:48,641 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_45c9f5b7-cb53-450a-843b-3fff3decde21/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 [2019-11-15 23:22:48,697 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-15 23:22:48,698 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-15 23:22:48,699 INFO L256 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 20 conjunts are in the unsatisfiable core [2019-11-15 23:22:48,705 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 23:22:48,747 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2019-11-15 23:22:48,748 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 23:22:48,748 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2019-11-15 23:22:48,748 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120669637] [2019-11-15 23:22:48,752 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-15 23:22:48,752 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 23:22:48,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-15 23:22:48,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2019-11-15 23:22:48,753 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand 14 states. [2019-11-15 23:22:48,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 23:22:48,923 INFO L93 Difference]: Finished difference Result 42 states and 43 transitions. [2019-11-15 23:22:48,924 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-15 23:22:48,924 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 57 [2019-11-15 23:22:48,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 23:22:48,925 INFO L225 Difference]: With dead ends: 42 [2019-11-15 23:22:48,925 INFO L226 Difference]: Without dead ends: 38 [2019-11-15 23:22:48,926 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=179, Invalid=327, Unknown=0, NotChecked=0, Total=506 [2019-11-15 23:22:48,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2019-11-15 23:22:48,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2019-11-15 23:22:48,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-11-15 23:22:48,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2019-11-15 23:22:48,938 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 57 [2019-11-15 23:22:48,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 23:22:48,938 INFO L462 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2019-11-15 23:22:48,938 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-15 23:22:48,938 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2019-11-15 23:22:48,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2019-11-15 23:22:48,941 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 23:22:48,942 INFO L380 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 23:22:49,142 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 23:22:49,142 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 23:22:49,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 23:22:49,143 INFO L82 PathProgramCache]: Analyzing trace with hash -2055304301, now seen corresponding path program 9 times [2019-11-15 23:22:49,143 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 23:22:49,143 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567425190] [2019-11-15 23:22:49,143 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:22:49,143 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:22:49,143 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 23:22:49,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:22:49,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:22:49,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:22:49,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:22:49,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:22:49,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:22:49,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:22:49,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:22:49,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:22:49,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:22:49,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:22:49,473 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2019-11-15 23:22:49,473 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567425190] [2019-11-15 23:22:49,473 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [353966871] [2019-11-15 23:22:49,474 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_45c9f5b7-cb53-450a-843b-3fff3decde21/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 [2019-11-15 23:22:49,537 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2019-11-15 23:22:49,537 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-15 23:22:49,538 INFO L256 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 22 conjunts are in the unsatisfiable core [2019-11-15 23:22:49,541 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 23:22:49,625 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2019-11-15 23:22:49,625 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 23:22:49,626 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2019-11-15 23:22:49,626 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877020701] [2019-11-15 23:22:49,627 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-11-15 23:22:49,627 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 23:22:49,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-11-15 23:22:49,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2019-11-15 23:22:49,628 INFO L87 Difference]: Start difference. First operand 38 states and 39 transitions. Second operand 15 states. [2019-11-15 23:22:49,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 23:22:49,798 INFO L93 Difference]: Finished difference Result 45 states and 46 transitions. [2019-11-15 23:22:49,798 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-11-15 23:22:49,798 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 63 [2019-11-15 23:22:49,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 23:22:49,799 INFO L225 Difference]: With dead ends: 45 [2019-11-15 23:22:49,799 INFO L226 Difference]: Without dead ends: 41 [2019-11-15 23:22:49,800 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=213, Invalid=387, Unknown=0, NotChecked=0, Total=600 [2019-11-15 23:22:49,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2019-11-15 23:22:49,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2019-11-15 23:22:49,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-11-15 23:22:49,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2019-11-15 23:22:49,805 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 63 [2019-11-15 23:22:49,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 23:22:49,805 INFO L462 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2019-11-15 23:22:49,805 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-11-15 23:22:49,805 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2019-11-15 23:22:49,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2019-11-15 23:22:49,811 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 23:22:49,811 INFO L380 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 23:22:50,017 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 23:22:50,018 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 23:22:50,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 23:22:50,018 INFO L82 PathProgramCache]: Analyzing trace with hash -1172322647, now seen corresponding path program 10 times [2019-11-15 23:22:50,018 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 23:22:50,018 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864105439] [2019-11-15 23:22:50,018 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:22:50,018 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:22:50,018 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 23:22:50,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:22:50,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:22:50,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:22:50,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:22:50,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:22:50,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:22:50,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:22:50,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:22:50,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:22:50,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:22:50,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:22:50,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:22:50,406 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2019-11-15 23:22:50,410 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864105439] [2019-11-15 23:22:50,410 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2147348684] [2019-11-15 23:22:50,411 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_45c9f5b7-cb53-450a-843b-3fff3decde21/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 [2019-11-15 23:22:50,474 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-15 23:22:50,474 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-15 23:22:50,475 INFO L256 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 24 conjunts are in the unsatisfiable core [2019-11-15 23:22:50,480 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 23:22:50,525 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2019-11-15 23:22:50,525 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 23:22:50,526 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2019-11-15 23:22:50,526 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028753696] [2019-11-15 23:22:50,527 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-11-15 23:22:50,527 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 23:22:50,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-11-15 23:22:50,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2019-11-15 23:22:50,528 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand 16 states. [2019-11-15 23:22:50,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 23:22:50,733 INFO L93 Difference]: Finished difference Result 48 states and 49 transitions. [2019-11-15 23:22:50,733 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-11-15 23:22:50,733 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 69 [2019-11-15 23:22:50,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 23:22:50,734 INFO L225 Difference]: With dead ends: 48 [2019-11-15 23:22:50,734 INFO L226 Difference]: Without dead ends: 44 [2019-11-15 23:22:50,735 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=250, Invalid=452, Unknown=0, NotChecked=0, Total=702 [2019-11-15 23:22:50,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2019-11-15 23:22:50,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2019-11-15 23:22:50,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-11-15 23:22:50,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 45 transitions. [2019-11-15 23:22:50,740 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 45 transitions. Word has length 69 [2019-11-15 23:22:50,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 23:22:50,741 INFO L462 AbstractCegarLoop]: Abstraction has 44 states and 45 transitions. [2019-11-15 23:22:50,741 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-11-15 23:22:50,741 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 45 transitions. [2019-11-15 23:22:50,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2019-11-15 23:22:50,742 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 23:22:50,743 INFO L380 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 23:22:50,943 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 23:22:50,943 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 23:22:50,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 23:22:50,944 INFO L82 PathProgramCache]: Analyzing trace with hash -1452916077, now seen corresponding path program 11 times [2019-11-15 23:22:50,944 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 23:22:50,944 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647497560] [2019-11-15 23:22:50,944 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:22:50,944 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:22:50,944 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 23:22:50,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:22:50,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:22:51,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:22:51,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:22:51,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:22:51,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:22:51,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:22:51,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:22:51,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:22:51,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:22:51,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:22:51,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:22:51,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:22:51,315 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2019-11-15 23:22:51,316 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647497560] [2019-11-15 23:22:51,316 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [466679357] [2019-11-15 23:22:51,316 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_45c9f5b7-cb53-450a-843b-3fff3decde21/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 [2019-11-15 23:22:51,399 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2019-11-15 23:22:51,399 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-15 23:22:51,401 INFO L256 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 26 conjunts are in the unsatisfiable core [2019-11-15 23:22:51,403 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 23:22:51,454 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2019-11-15 23:22:51,454 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 23:22:51,454 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2019-11-15 23:22:51,454 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319804113] [2019-11-15 23:22:51,456 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-11-15 23:22:51,456 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 23:22:51,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-11-15 23:22:51,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=174, Unknown=0, NotChecked=0, Total=272 [2019-11-15 23:22:51,457 INFO L87 Difference]: Start difference. First operand 44 states and 45 transitions. Second operand 17 states. [2019-11-15 23:22:51,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 23:22:51,658 INFO L93 Difference]: Finished difference Result 51 states and 52 transitions. [2019-11-15 23:22:51,659 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-11-15 23:22:51,659 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 75 [2019-11-15 23:22:51,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 23:22:51,660 INFO L225 Difference]: With dead ends: 51 [2019-11-15 23:22:51,660 INFO L226 Difference]: Without dead ends: 47 [2019-11-15 23:22:51,661 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=290, Invalid=522, Unknown=0, NotChecked=0, Total=812 [2019-11-15 23:22:51,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2019-11-15 23:22:51,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2019-11-15 23:22:51,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2019-11-15 23:22:51,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 48 transitions. [2019-11-15 23:22:51,670 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 48 transitions. Word has length 75 [2019-11-15 23:22:51,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 23:22:51,670 INFO L462 AbstractCegarLoop]: Abstraction has 47 states and 48 transitions. [2019-11-15 23:22:51,670 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-11-15 23:22:51,670 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 48 transitions. [2019-11-15 23:22:51,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2019-11-15 23:22:51,671 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 23:22:51,672 INFO L380 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 23:22:51,876 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 23:22:51,876 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 23:22:51,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 23:22:51,877 INFO L82 PathProgramCache]: Analyzing trace with hash -461124311, now seen corresponding path program 12 times [2019-11-15 23:22:51,877 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 23:22:51,877 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123947131] [2019-11-15 23:22:51,877 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:22:51,877 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:22:51,878 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 23:22:51,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:22:51,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:22:51,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:22:51,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:22:52,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:22:52,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:22:52,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:22:52,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:22:52,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:22:52,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:22:52,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:22:52,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:22:52,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:22:52,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:22:52,252 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2019-11-15 23:22:52,252 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123947131] [2019-11-15 23:22:52,252 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [664635013] [2019-11-15 23:22:52,252 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_45c9f5b7-cb53-450a-843b-3fff3decde21/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 [2019-11-15 23:22:52,328 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2019-11-15 23:22:52,328 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-15 23:22:52,330 INFO L256 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 28 conjunts are in the unsatisfiable core [2019-11-15 23:22:52,332 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 23:22:52,392 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2019-11-15 23:22:52,392 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 23:22:52,392 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2019-11-15 23:22:52,393 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971587734] [2019-11-15 23:22:52,395 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-11-15 23:22:52,395 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 23:22:52,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-11-15 23:22:52,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=194, Unknown=0, NotChecked=0, Total=306 [2019-11-15 23:22:52,396 INFO L87 Difference]: Start difference. First operand 47 states and 48 transitions. Second operand 18 states. [2019-11-15 23:22:52,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 23:22:52,606 INFO L93 Difference]: Finished difference Result 54 states and 55 transitions. [2019-11-15 23:22:52,606 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-11-15 23:22:52,606 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 81 [2019-11-15 23:22:52,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 23:22:52,607 INFO L225 Difference]: With dead ends: 54 [2019-11-15 23:22:52,607 INFO L226 Difference]: Without dead ends: 50 [2019-11-15 23:22:52,608 INFO L600 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 [2019-11-15 23:22:52,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2019-11-15 23:22:52,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2019-11-15 23:22:52,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2019-11-15 23:22:52,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 51 transitions. [2019-11-15 23:22:52,616 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 51 transitions. Word has length 81 [2019-11-15 23:22:52,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 23:22:52,617 INFO L462 AbstractCegarLoop]: Abstraction has 50 states and 51 transitions. [2019-11-15 23:22:52,617 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-11-15 23:22:52,617 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 51 transitions. [2019-11-15 23:22:52,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2019-11-15 23:22:52,619 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 23:22:52,619 INFO L380 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 23:22:52,823 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 23:22:52,823 INFO L410 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 23:22:52,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 23:22:52,824 INFO L82 PathProgramCache]: Analyzing trace with hash -1887065709, now seen corresponding path program 13 times [2019-11-15 23:22:52,824 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 23:22:52,824 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226625305] [2019-11-15 23:22:52,824 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:22:52,825 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:22:52,825 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 23:22:52,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:22:52,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:22:52,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:22:52,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:22:52,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:22:53,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:22:53,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:22:53,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:22:53,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:22:53,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:22:53,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:22:53,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:22:53,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:22:53,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:22:53,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:22:53,329 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2019-11-15 23:22:53,329 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226625305] [2019-11-15 23:22:53,330 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2088174594] [2019-11-15 23:22:53,330 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_45c9f5b7-cb53-450a-843b-3fff3decde21/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 [2019-11-15 23:22:53,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:22:53,403 INFO L256 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 30 conjunts are in the unsatisfiable core [2019-11-15 23:22:53,408 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 23:22:53,460 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2019-11-15 23:22:53,460 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 23:22:53,461 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2019-11-15 23:22:53,461 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824332526] [2019-11-15 23:22:53,461 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-11-15 23:22:53,462 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 23:22:53,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-11-15 23:22:53,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=215, Unknown=0, NotChecked=0, Total=342 [2019-11-15 23:22:53,462 INFO L87 Difference]: Start difference. First operand 50 states and 51 transitions. Second operand 19 states. [2019-11-15 23:22:53,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 23:22:53,691 INFO L93 Difference]: Finished difference Result 57 states and 58 transitions. [2019-11-15 23:22:53,691 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-11-15 23:22:53,691 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 87 [2019-11-15 23:22:53,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 23:22:53,692 INFO L225 Difference]: With dead ends: 57 [2019-11-15 23:22:53,692 INFO L226 Difference]: Without dead ends: 53 [2019-11-15 23:22:53,693 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=379, Invalid=677, Unknown=0, NotChecked=0, Total=1056 [2019-11-15 23:22:53,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2019-11-15 23:22:53,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2019-11-15 23:22:53,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2019-11-15 23:22:53,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2019-11-15 23:22:53,705 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 87 [2019-11-15 23:22:53,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 23:22:53,706 INFO L462 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2019-11-15 23:22:53,706 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-11-15 23:22:53,706 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2019-11-15 23:22:53,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2019-11-15 23:22:53,708 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 23:22:53,708 INFO L380 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 23:22:53,917 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 23:22:53,917 INFO L410 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 23:22:53,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 23:22:53,918 INFO L82 PathProgramCache]: Analyzing trace with hash -1777212503, now seen corresponding path program 14 times [2019-11-15 23:22:53,918 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 23:22:53,918 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844439850] [2019-11-15 23:22:53,918 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:22:53,918 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:22:53,918 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 23:22:53,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:22:53,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:22:54,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:22:54,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:22:54,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:22:54,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:22:54,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:22:54,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:22:54,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:22:54,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:22:54,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:22:54,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:22:54,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:22:54,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:22:54,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:22:54,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:22:54,455 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2019-11-15 23:22:54,456 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844439850] [2019-11-15 23:22:54,456 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1075934654] [2019-11-15 23:22:54,456 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_45c9f5b7-cb53-450a-843b-3fff3decde21/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 [2019-11-15 23:22:54,534 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-15 23:22:54,534 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-15 23:22:54,536 INFO L256 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 32 conjunts are in the unsatisfiable core [2019-11-15 23:22:54,538 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 23:22:54,589 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2019-11-15 23:22:54,591 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 23:22:54,591 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2019-11-15 23:22:54,592 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661274536] [2019-11-15 23:22:54,592 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-11-15 23:22:54,592 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 23:22:54,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-11-15 23:22:54,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=237, Unknown=0, NotChecked=0, Total=380 [2019-11-15 23:22:54,593 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand 20 states. [2019-11-15 23:22:54,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 23:22:54,821 INFO L93 Difference]: Finished difference Result 60 states and 61 transitions. [2019-11-15 23:22:54,821 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-11-15 23:22:54,822 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 93 [2019-11-15 23:22:54,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 23:22:54,823 INFO L225 Difference]: With dead ends: 60 [2019-11-15 23:22:54,823 INFO L226 Difference]: Without dead ends: 56 [2019-11-15 23:22:54,824 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=428, Invalid=762, Unknown=0, NotChecked=0, Total=1190 [2019-11-15 23:22:54,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2019-11-15 23:22:54,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2019-11-15 23:22:54,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2019-11-15 23:22:54,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 57 transitions. [2019-11-15 23:22:54,830 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 57 transitions. Word has length 93 [2019-11-15 23:22:54,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 23:22:54,830 INFO L462 AbstractCegarLoop]: Abstraction has 56 states and 57 transitions. [2019-11-15 23:22:54,830 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-11-15 23:22:54,830 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 57 transitions. [2019-11-15 23:22:54,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2019-11-15 23:22:54,832 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 23:22:54,832 INFO L380 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 23:22:55,035 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 23:22:55,035 INFO L410 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 23:22:55,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 23:22:55,035 INFO L82 PathProgramCache]: Analyzing trace with hash -948911981, now seen corresponding path program 15 times [2019-11-15 23:22:55,036 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 23:22:55,036 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982002231] [2019-11-15 23:22:55,036 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:22:55,036 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:22:55,036 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 23:22:55,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:22:55,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:22:55,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:22:55,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:22:55,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:22:55,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:22:55,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:22:55,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:22:55,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:22:55,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:22:55,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:22:55,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:22:55,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:22:55,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:22:55,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:22:55,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:22:55,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:22:55,583 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2019-11-15 23:22:55,583 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982002231] [2019-11-15 23:22:55,586 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1083493135] [2019-11-15 23:22:55,586 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_45c9f5b7-cb53-450a-843b-3fff3decde21/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 [2019-11-15 23:22:55,678 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2019-11-15 23:22:55,678 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-15 23:22:55,680 INFO L256 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 34 conjunts are in the unsatisfiable core [2019-11-15 23:22:55,682 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 23:22:55,738 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2019-11-15 23:22:55,739 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 23:22:55,739 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2019-11-15 23:22:55,739 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527042620] [2019-11-15 23:22:55,740 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-11-15 23:22:55,740 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 23:22:55,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-11-15 23:22:55,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=260, Unknown=0, NotChecked=0, Total=420 [2019-11-15 23:22:55,741 INFO L87 Difference]: Start difference. First operand 56 states and 57 transitions. Second operand 21 states. [2019-11-15 23:22:56,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 23:22:56,011 INFO L93 Difference]: Finished difference Result 63 states and 64 transitions. [2019-11-15 23:22:56,011 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-11-15 23:22:56,011 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 99 [2019-11-15 23:22:56,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 23:22:56,012 INFO L225 Difference]: With dead ends: 63 [2019-11-15 23:22:56,012 INFO L226 Difference]: Without dead ends: 59 [2019-11-15 23:22:56,013 INFO L600 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 [2019-11-15 23:22:56,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2019-11-15 23:22:56,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2019-11-15 23:22:56,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2019-11-15 23:22:56,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 60 transitions. [2019-11-15 23:22:56,021 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 60 transitions. Word has length 99 [2019-11-15 23:22:56,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 23:22:56,021 INFO L462 AbstractCegarLoop]: Abstraction has 59 states and 60 transitions. [2019-11-15 23:22:56,021 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-11-15 23:22:56,022 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 60 transitions. [2019-11-15 23:22:56,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2019-11-15 23:22:56,023 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 23:22:56,023 INFO L380 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 23:22:56,232 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 23:22:56,233 INFO L410 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 23:22:56,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 23:22:56,233 INFO L82 PathProgramCache]: Analyzing trace with hash 1159072297, now seen corresponding path program 16 times [2019-11-15 23:22:56,233 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 23:22:56,233 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289931606] [2019-11-15 23:22:56,233 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:22:56,233 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:22:56,233 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 23:22:56,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:22:56,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:22:56,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:22:56,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:22:56,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:22:56,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:22:56,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:22:56,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:22:56,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:22:56,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:22:56,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:22:56,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:22:56,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:22:56,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:22:56,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:22:56,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:22:56,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:22:56,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:22:56,783 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2019-11-15 23:22:56,783 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289931606] [2019-11-15 23:22:56,784 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1580828345] [2019-11-15 23:22:56,784 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_45c9f5b7-cb53-450a-843b-3fff3decde21/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 [2019-11-15 23:22:56,873 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-15 23:22:56,873 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-15 23:22:56,875 INFO L256 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 36 conjunts are in the unsatisfiable core [2019-11-15 23:22:56,878 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 23:22:56,933 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2019-11-15 23:22:56,933 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 23:22:56,933 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2019-11-15 23:22:56,933 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777251288] [2019-11-15 23:22:56,936 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-11-15 23:22:56,936 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 23:22:56,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-11-15 23:22:56,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=284, Unknown=0, NotChecked=0, Total=462 [2019-11-15 23:22:56,937 INFO L87 Difference]: Start difference. First operand 59 states and 60 transitions. Second operand 22 states. [2019-11-15 23:22:57,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 23:22:57,237 INFO L93 Difference]: Finished difference Result 66 states and 67 transitions. [2019-11-15 23:22:57,237 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-11-15 23:22:57,237 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 105 [2019-11-15 23:22:57,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 23:22:57,238 INFO L225 Difference]: With dead ends: 66 [2019-11-15 23:22:57,238 INFO L226 Difference]: Without dead ends: 62 [2019-11-15 23:22:57,239 INFO L600 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 [2019-11-15 23:22:57,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2019-11-15 23:22:57,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2019-11-15 23:22:57,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2019-11-15 23:22:57,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 63 transitions. [2019-11-15 23:22:57,244 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 63 transitions. Word has length 105 [2019-11-15 23:22:57,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 23:22:57,244 INFO L462 AbstractCegarLoop]: Abstraction has 62 states and 63 transitions. [2019-11-15 23:22:57,244 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-11-15 23:22:57,245 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 63 transitions. [2019-11-15 23:22:57,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2019-11-15 23:22:57,250 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 23:22:57,250 INFO L380 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 23:22:57,454 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 23:22:57,455 INFO L410 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 23:22:57,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 23:22:57,455 INFO L82 PathProgramCache]: Analyzing trace with hash 2109441939, now seen corresponding path program 17 times [2019-11-15 23:22:57,456 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 23:22:57,456 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229073055] [2019-11-15 23:22:57,456 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:22:57,456 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:22:57,456 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 23:22:57,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:22:57,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:22:57,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:22:57,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:22:57,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:22:57,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:22:57,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:22:57,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:22:57,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:22:57,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:22:57,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:22:57,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:22:57,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:22:57,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:22:57,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:22:57,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:22:57,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:22:57,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:22:58,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:22:58,094 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2019-11-15 23:22:58,094 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229073055] [2019-11-15 23:22:58,094 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [568556190] [2019-11-15 23:22:58,095 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_45c9f5b7-cb53-450a-843b-3fff3decde21/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 [2019-11-15 23:22:58,179 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2019-11-15 23:22:58,179 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-15 23:22:58,181 INFO L256 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 38 conjunts are in the unsatisfiable core [2019-11-15 23:22:58,184 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 23:22:58,230 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2019-11-15 23:22:58,230 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 23:22:58,230 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2019-11-15 23:22:58,231 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634867887] [2019-11-15 23:22:58,231 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-11-15 23:22:58,231 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 23:22:58,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-11-15 23:22:58,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=309, Unknown=0, NotChecked=0, Total=506 [2019-11-15 23:22:58,232 INFO L87 Difference]: Start difference. First operand 62 states and 63 transitions. Second operand 23 states. [2019-11-15 23:22:58,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 23:22:58,486 INFO L93 Difference]: Finished difference Result 69 states and 70 transitions. [2019-11-15 23:22:58,486 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-11-15 23:22:58,486 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 111 [2019-11-15 23:22:58,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 23:22:58,487 INFO L225 Difference]: With dead ends: 69 [2019-11-15 23:22:58,487 INFO L226 Difference]: Without dead ends: 65 [2019-11-15 23:22:58,488 INFO L600 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 [2019-11-15 23:22:58,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2019-11-15 23:22:58,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2019-11-15 23:22:58,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2019-11-15 23:22:58,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 66 transitions. [2019-11-15 23:22:58,493 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 66 transitions. Word has length 111 [2019-11-15 23:22:58,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 23:22:58,493 INFO L462 AbstractCegarLoop]: Abstraction has 65 states and 66 transitions. [2019-11-15 23:22:58,493 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-11-15 23:22:58,493 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 66 transitions. [2019-11-15 23:22:58,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2019-11-15 23:22:58,494 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 23:22:58,494 INFO L380 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 23:22:58,702 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 23:22:58,703 INFO L410 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 23:22:58,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 23:22:58,703 INFO L82 PathProgramCache]: Analyzing trace with hash 450642089, now seen corresponding path program 18 times [2019-11-15 23:22:58,703 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 23:22:58,703 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342016703] [2019-11-15 23:22:58,703 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:22:58,703 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:22:58,703 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 23:22:58,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:22:58,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:22:58,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:22:58,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:22:58,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:22:58,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:22:58,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:22:58,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:22:58,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:22:58,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:22:59,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:22:59,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:22:59,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:22:59,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:22:59,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:22:59,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:22:59,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:22:59,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:22:59,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:22:59,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:22:59,425 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2019-11-15 23:22:59,426 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342016703] [2019-11-15 23:22:59,426 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1305476974] [2019-11-15 23:22:59,426 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_45c9f5b7-cb53-450a-843b-3fff3decde21/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 [2019-11-15 23:22:59,554 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2019-11-15 23:22:59,554 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-15 23:22:59,556 INFO L256 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 40 conjunts are in the unsatisfiable core [2019-11-15 23:22:59,559 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 23:22:59,630 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2019-11-15 23:22:59,630 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 23:22:59,631 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2019-11-15 23:22:59,631 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408332832] [2019-11-15 23:22:59,631 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-11-15 23:22:59,632 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 23:22:59,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-11-15 23:22:59,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=335, Unknown=0, NotChecked=0, Total=552 [2019-11-15 23:22:59,632 INFO L87 Difference]: Start difference. First operand 65 states and 66 transitions. Second operand 24 states. [2019-11-15 23:22:59,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 23:22:59,885 INFO L93 Difference]: Finished difference Result 72 states and 73 transitions. [2019-11-15 23:22:59,886 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-11-15 23:22:59,886 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 117 [2019-11-15 23:22:59,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 23:22:59,887 INFO L225 Difference]: With dead ends: 72 [2019-11-15 23:22:59,887 INFO L226 Difference]: Without dead ends: 68 [2019-11-15 23:22:59,888 INFO L600 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 [2019-11-15 23:22:59,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2019-11-15 23:22:59,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2019-11-15 23:22:59,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2019-11-15 23:22:59,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 69 transitions. [2019-11-15 23:22:59,893 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 69 transitions. Word has length 117 [2019-11-15 23:22:59,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 23:22:59,893 INFO L462 AbstractCegarLoop]: Abstraction has 68 states and 69 transitions. [2019-11-15 23:22:59,894 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-11-15 23:22:59,894 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 69 transitions. [2019-11-15 23:22:59,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2019-11-15 23:22:59,895 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 23:22:59,895 INFO L380 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 23:23:00,098 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 23:23:00,098 INFO L410 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 23:23:00,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 23:23:00,099 INFO L82 PathProgramCache]: Analyzing trace with hash -1141244269, now seen corresponding path program 19 times [2019-11-15 23:23:00,099 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 23:23:00,099 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766550993] [2019-11-15 23:23:00,099 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:23:00,099 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:23:00,099 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 23:23:00,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:23:00,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:23:00,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:23:00,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:23:00,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:23:00,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:23:00,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:23:00,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:23:00,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:23:00,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:23:00,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:23:00,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:23:00,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:23:00,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:23:00,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:23:00,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:23:00,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:23:00,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:23:00,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:23:00,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:23:00,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:23:00,840 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2019-11-15 23:23:00,840 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766550993] [2019-11-15 23:23:00,840 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [401104610] [2019-11-15 23:23:00,841 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_45c9f5b7-cb53-450a-843b-3fff3decde21/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 [2019-11-15 23:23:00,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:23:00,941 INFO L256 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 42 conjunts are in the unsatisfiable core [2019-11-15 23:23:00,945 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 23:23:01,004 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2019-11-15 23:23:01,005 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 23:23:01,005 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2019-11-15 23:23:01,005 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349219804] [2019-11-15 23:23:01,006 INFO L442 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-11-15 23:23:01,006 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 23:23:01,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-11-15 23:23:01,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=238, Invalid=362, Unknown=0, NotChecked=0, Total=600 [2019-11-15 23:23:01,007 INFO L87 Difference]: Start difference. First operand 68 states and 69 transitions. Second operand 25 states. [2019-11-15 23:23:01,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 23:23:01,349 INFO L93 Difference]: Finished difference Result 75 states and 76 transitions. [2019-11-15 23:23:01,349 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-11-15 23:23:01,349 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 123 [2019-11-15 23:23:01,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 23:23:01,350 INFO L225 Difference]: With dead ends: 75 [2019-11-15 23:23:01,350 INFO L226 Difference]: Without dead ends: 71 [2019-11-15 23:23:01,351 INFO L600 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 [2019-11-15 23:23:01,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2019-11-15 23:23:01,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2019-11-15 23:23:01,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2019-11-15 23:23:01,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 72 transitions. [2019-11-15 23:23:01,355 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 72 transitions. Word has length 123 [2019-11-15 23:23:01,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 23:23:01,356 INFO L462 AbstractCegarLoop]: Abstraction has 71 states and 72 transitions. [2019-11-15 23:23:01,356 INFO L463 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-11-15 23:23:01,356 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 72 transitions. [2019-11-15 23:23:01,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2019-11-15 23:23:01,357 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 23:23:01,357 INFO L380 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 23:23:01,560 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 23:23:01,560 INFO L410 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 23:23:01,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 23:23:01,561 INFO L82 PathProgramCache]: Analyzing trace with hash -1280276695, now seen corresponding path program 20 times [2019-11-15 23:23:01,561 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 23:23:01,561 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129548101] [2019-11-15 23:23:01,561 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:23:01,561 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:23:01,561 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 23:23:01,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:23:01,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:23:01,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:23:01,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:23:01,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:23:02,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:23:02,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:23:02,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:23:02,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:23:02,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:23:02,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:23:02,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:23:02,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:23:02,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:23:02,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:23:03,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:23:03,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:23:03,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:23:03,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:23:03,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:23:03,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:23:03,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:23:04,209 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 589 proven. 40 refuted. 0 times theorem prover too weak. 591 trivial. 0 not checked. [2019-11-15 23:23:04,210 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129548101] [2019-11-15 23:23:04,210 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1168776811] [2019-11-15 23:23:04,210 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_45c9f5b7-cb53-450a-843b-3fff3decde21/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 [2019-11-15 23:23:04,316 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-15 23:23:04,317 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-15 23:23:04,321 INFO L256 TraceCheckSpWp]: Trace formula consists of 388 conjuncts, 177 conjunts are in the unsatisfiable core [2019-11-15 23:23:04,324 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 23:23:07,174 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 39 proven. 610 refuted. 0 times theorem prover too weak. 571 trivial. 0 not checked. [2019-11-15 23:23:07,175 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 23:23:07,175 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 49] total 94 [2019-11-15 23:23:07,175 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167426898] [2019-11-15 23:23:07,176 INFO L442 AbstractCegarLoop]: Interpolant automaton has 94 states [2019-11-15 23:23:07,176 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 23:23:07,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2019-11-15 23:23:07,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=580, Invalid=8162, Unknown=0, NotChecked=0, Total=8742 [2019-11-15 23:23:07,180 INFO L87 Difference]: Start difference. First operand 71 states and 72 transitions. Second operand 94 states. [2019-11-15 23:23:11,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 23:23:11,534 INFO L93 Difference]: Finished difference Result 74 states and 76 transitions. [2019-11-15 23:23:11,535 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2019-11-15 23:23:11,535 INFO L78 Accepts]: Start accepts. Automaton has 94 states. Word has length 129 [2019-11-15 23:23:11,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 23:23:11,537 INFO L225 Difference]: With dead ends: 74 [2019-11-15 23:23:11,537 INFO L226 Difference]: Without dead ends: 0 [2019-11-15 23:23:11,543 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3521 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=1382, Invalid=17250, Unknown=0, NotChecked=0, Total=18632 [2019-11-15 23:23:11,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-11-15 23:23:11,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-11-15 23:23:11,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-11-15 23:23:11,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-11-15 23:23:11,543 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 129 [2019-11-15 23:23:11,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 23:23:11,544 INFO L462 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-11-15 23:23:11,544 INFO L463 AbstractCegarLoop]: Interpolant automaton has 94 states. [2019-11-15 23:23:11,544 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-11-15 23:23:11,544 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-11-15 23:23:11,744 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 23:23:11,750 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2019-11-15 23:23:11,767 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2019-11-15 23:23:11,767 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2019-11-15 23:23:11,767 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2019-11-15 23:23:11,767 INFO L443 ceAbstractionStarter]: For program point L16(line 16) no Hoare annotation was computed. [2019-11-15 23:23:11,768 INFO L443 ceAbstractionStarter]: For program point L15(lines 15 17) no Hoare annotation was computed. [2019-11-15 23:23:11,768 INFO L439 ceAbstractionStarter]: At program point L14(line 14) the Hoare annotation is: (= ULTIMATE.start_main_~a~0 20) [2019-11-15 23:23:11,768 INFO L443 ceAbstractionStarter]: For program point L14-1(line 14) no Hoare annotation was computed. [2019-11-15 23:23:11,768 INFO L443 ceAbstractionStarter]: For program point L11(lines 11 18) no Hoare annotation was computed. [2019-11-15 23:23:11,768 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 16) no Hoare annotation was computed. [2019-11-15 23:23:11,768 INFO L443 ceAbstractionStarter]: For program point sumEXIT(lines 3 9) no Hoare annotation was computed. [2019-11-15 23:23:11,768 INFO L439 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)) [2019-11-15 23:23:11,769 INFO L443 ceAbstractionStarter]: For program point L7-1(line 7) no Hoare annotation was computed. [2019-11-15 23:23:11,769 INFO L443 ceAbstractionStarter]: For program point L4(lines 4 8) no Hoare annotation was computed. [2019-11-15 23:23:11,769 INFO L443 ceAbstractionStarter]: For program point sumFINAL(lines 3 9) no Hoare annotation was computed. [2019-11-15 23:23:11,769 INFO L446 ceAbstractionStarter]: At program point sumENTRY(lines 3 9) the Hoare annotation is: true [2019-11-15 23:23:11,771 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.11 11:23:11 BoogieIcfgContainer [2019-11-15 23:23:11,772 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-15 23:23:11,772 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-15 23:23:11,772 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-15 23:23:11,772 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-15 23:23:11,773 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.11 11:22:43" (3/4) ... [2019-11-15 23:23:11,776 INFO L137 WitnessPrinter]: Generating witness for correct program [2019-11-15 23:23:11,783 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure sum [2019-11-15 23:23:11,787 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2019-11-15 23:23:11,788 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2019-11-15 23:23:11,824 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_45c9f5b7-cb53-450a-843b-3fff3decde21/bin/uautomizer/witness.graphml [2019-11-15 23:23:11,824 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-15 23:23:11,826 INFO L168 Benchmark]: Toolchain (without parser) took 28698.48 ms. Allocated memory was 1.0 GB in the beginning and 1.6 GB in the end (delta: 543.7 MB). Free memory was 951.4 MB in the beginning and 866.9 MB in the end (delta: 84.6 MB). Peak memory consumption was 628.3 MB. Max. memory is 11.5 GB. [2019-11-15 23:23:11,826 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 1.0 GB. Free memory is still 967.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-15 23:23:11,827 INFO L168 Benchmark]: CACSL2BoogieTranslator took 281.99 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 159.4 MB). Free memory was 951.4 MB in the beginning and 1.2 GB in the end (delta: -200.2 MB). Peak memory consumption was 22.8 MB. Max. memory is 11.5 GB. [2019-11-15 23:23:11,827 INFO L168 Benchmark]: Boogie Procedure Inliner took 30.66 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. [2019-11-15 23:23:11,828 INFO L168 Benchmark]: Boogie Preprocessor took 16.28 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. [2019-11-15 23:23:11,828 INFO L168 Benchmark]: RCFGBuilder took 244.75 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.1 GB in the end (delta: 22.1 MB). Peak memory consumption was 22.1 MB. Max. memory is 11.5 GB. [2019-11-15 23:23:11,829 INFO L168 Benchmark]: TraceAbstraction took 28068.48 ms. Allocated memory was 1.2 GB in the beginning and 1.6 GB in the end (delta: 384.3 MB). Free memory was 1.1 GB in the beginning and 885.1 MB in the end (delta: 244.5 MB). Peak memory consumption was 628.8 MB. Max. memory is 11.5 GB. [2019-11-15 23:23:11,829 INFO L168 Benchmark]: Witness Printer took 52.21 ms. Allocated memory is still 1.6 GB. Free memory was 885.1 MB in the beginning and 866.9 MB in the end (delta: 18.2 MB). Peak memory consumption was 18.2 MB. Max. memory is 11.5 GB. [2019-11-15 23:23:11,831 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 1.0 GB. Free memory is still 967.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 281.99 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 159.4 MB). Free memory was 951.4 MB in the beginning and 1.2 GB in the end (delta: -200.2 MB). Peak memory consumption was 22.8 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 30.66 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 16.28 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 244.75 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.1 GB in the end (delta: 22.1 MB). Peak memory consumption was 22.1 MB. Max. memory is 11.5 GB. * TraceAbstraction took 28068.48 ms. Allocated memory was 1.2 GB in the beginning and 1.6 GB in the end (delta: 384.3 MB). Free memory was 1.1 GB in the beginning and 885.1 MB in the end (delta: 244.5 MB). Peak memory consumption was 628.8 MB. Max. memory is 11.5 GB. * Witness Printer took 52.21 ms. Allocated memory is still 1.6 GB. Free memory was 885.1 MB in the beginning and 866.9 MB in the end (delta: 18.2 MB). Peak memory consumption was 18.2 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: 27.9s, OverallIterations: 21, TraceHistogramMax: 21, AutomataDifference: 8.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 187 SDtfs, 730 SDslu, 1980 SDs, 0 SdLazy, 3532 SolverSat, 248 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2431 GetRequests, 1817 SyntacticMatches, 0 SemanticMatches, 614 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6181 ImplicationChecksByTransitivity, 13.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=71occurred in iteration=20, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 21 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 3 LocationsWithAnnotation, 5 PreInvPairs, 5 NumberOfFragments, 14 HoareAnnotationTreeSize, 5 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 3 FomulaSimplificationsInter, 4 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.8s SatisfiabilityAnalysisTime, 13.4s InterpolantComputationTime, 2889 NumberOfCodeBlocks, 2889 NumberOfCodeBlocksAsserted, 144 NumberOfCheckSat, 2848 ConstructedInterpolants, 0 QuantifiedInterpolants, 804736 SizeOfPredicates, 254 NumberOfNonLiveVariables, 4340 ConjunctsInSsa, 633 ConjunctsInUnsatCore, 41 InterpolantComputations, 1 PerfectInterpolantSequences, 9390/17640 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...