./Ultimate.py --spec ../../sv-benchmarks/c/ReachSafety.prp --file ../../sv-benchmarks/c/bitvector-regression/recHanoi03_false-unreach-call_true-termination.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 1dbac8bc Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_9e8076ce-b8cf-436b-8298-c40c92fd0814/bin-2019/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_9e8076ce-b8cf-436b-8298-c40c92fd0814/bin-2019/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_9e8076ce-b8cf-436b-8298-c40c92fd0814/bin-2019/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_9e8076ce-b8cf-436b-8298-c40c92fd0814/bin-2019/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/bitvector-regression/recHanoi03_false-unreach-call_true-termination.c -s /tmp/vcloud-vcloud-master/worker/working_dir_9e8076ce-b8cf-436b-8298-c40c92fd0814/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_9e8076ce-b8cf-436b-8298-c40c92fd0814/bin-2019/utaipan --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 Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 9cd87c15c4637a3ecd407847e5a675763d5fece5 ......................................................................................................................................................................................................................................... Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_9e8076ce-b8cf-436b-8298-c40c92fd0814/bin-2019/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_9e8076ce-b8cf-436b-8298-c40c92fd0814/bin-2019/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_9e8076ce-b8cf-436b-8298-c40c92fd0814/bin-2019/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_9e8076ce-b8cf-436b-8298-c40c92fd0814/bin-2019/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/bitvector-regression/recHanoi03_false-unreach-call_true-termination.c -s /tmp/vcloud-vcloud-master/worker/working_dir_9e8076ce-b8cf-436b-8298-c40c92fd0814/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_9e8076ce-b8cf-436b-8298-c40c92fd0814/bin-2019/utaipan --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 Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 9cd87c15c4637a3ecd407847e5a675763d5fece5 .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.1.23-1dbac8b [2018-10-26 20:45:17,582 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-26 20:45:17,583 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-26 20:45:17,591 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-26 20:45:17,591 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-26 20:45:17,592 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-26 20:45:17,593 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-26 20:45:17,595 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-26 20:45:17,596 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-26 20:45:17,597 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-26 20:45:17,598 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-26 20:45:17,598 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-26 20:45:17,599 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-26 20:45:17,600 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-26 20:45:17,601 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-26 20:45:17,601 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-26 20:45:17,603 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-26 20:45:17,604 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-26 20:45:17,605 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-26 20:45:17,607 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-26 20:45:17,608 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-26 20:45:17,609 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-26 20:45:17,611 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-10-26 20:45:17,611 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-10-26 20:45:17,612 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-10-26 20:45:17,612 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-10-26 20:45:17,613 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-10-26 20:45:17,614 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-10-26 20:45:17,615 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-10-26 20:45:17,616 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-10-26 20:45:17,616 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-10-26 20:45:17,616 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-10-26 20:45:17,617 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-10-26 20:45:17,617 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-10-26 20:45:17,618 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-10-26 20:45:17,619 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-10-26 20:45:17,619 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_9e8076ce-b8cf-436b-8298-c40c92fd0814/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2018-10-26 20:45:17,634 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-26 20:45:17,634 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-26 20:45:17,635 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-26 20:45:17,635 INFO L133 SettingsManager]: * User list type=DISABLED [2018-10-26 20:45:17,635 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-10-26 20:45:17,635 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-10-26 20:45:17,635 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-10-26 20:45:17,635 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-10-26 20:45:17,636 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-10-26 20:45:17,636 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-10-26 20:45:17,636 INFO L133 SettingsManager]: * Interval Domain=false [2018-10-26 20:45:17,636 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-26 20:45:17,637 INFO L133 SettingsManager]: * sizeof long=4 [2018-10-26 20:45:17,637 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-26 20:45:17,637 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-10-26 20:45:17,637 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-26 20:45:17,637 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-26 20:45:17,637 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-26 20:45:17,640 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-26 20:45:17,640 INFO L133 SettingsManager]: * sizeof long double=12 [2018-10-26 20:45:17,640 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-26 20:45:17,640 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-26 20:45:17,641 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-26 20:45:17,641 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-26 20:45:17,641 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-26 20:45:17,641 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-26 20:45:17,641 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-26 20:45:17,641 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-26 20:45:17,641 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-26 20:45:17,642 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-26 20:45:17,642 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-10-26 20:45:17,642 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-26 20:45:17,642 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-26 20:45:17,642 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-26 20:45:17,642 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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/working_dir_9e8076ce-b8cf-436b-8298-c40c92fd0814/bin-2019/utaipan 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 -> Taipan 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 -> 9cd87c15c4637a3ecd407847e5a675763d5fece5 [2018-10-26 20:45:17,681 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-26 20:45:17,691 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-26 20:45:17,694 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-26 20:45:17,696 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-26 20:45:17,696 INFO L276 PluginConnector]: CDTParser initialized [2018-10-26 20:45:17,697 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_9e8076ce-b8cf-436b-8298-c40c92fd0814/bin-2019/utaipan/../../sv-benchmarks/c/bitvector-regression/recHanoi03_false-unreach-call_true-termination.c [2018-10-26 20:45:17,745 INFO L218 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_9e8076ce-b8cf-436b-8298-c40c92fd0814/bin-2019/utaipan/data/54a7f7cdd/63f90e49ec5c4fb081060e47ccf168cf/FLAGcd0f09fb6 [2018-10-26 20:45:18,122 INFO L298 CDTParser]: Found 1 translation units. [2018-10-26 20:45:18,124 INFO L158 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_9e8076ce-b8cf-436b-8298-c40c92fd0814/sv-benchmarks/c/bitvector-regression/recHanoi03_false-unreach-call_true-termination.c [2018-10-26 20:45:18,130 INFO L346 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_9e8076ce-b8cf-436b-8298-c40c92fd0814/bin-2019/utaipan/data/54a7f7cdd/63f90e49ec5c4fb081060e47ccf168cf/FLAGcd0f09fb6 [2018-10-26 20:45:18,148 INFO L354 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_9e8076ce-b8cf-436b-8298-c40c92fd0814/bin-2019/utaipan/data/54a7f7cdd/63f90e49ec5c4fb081060e47ccf168cf [2018-10-26 20:45:18,151 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-26 20:45:18,153 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-10-26 20:45:18,154 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-26 20:45:18,156 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-26 20:45:18,161 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-26 20:45:18,162 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 08:45:18" (1/1) ... [2018-10-26 20:45:18,165 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4fa72dd7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:45:18, skipping insertion in model container [2018-10-26 20:45:18,166 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 08:45:18" (1/1) ... [2018-10-26 20:45:18,175 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-26 20:45:18,190 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-26 20:45:18,310 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-26 20:45:18,313 INFO L189 MainTranslator]: Completed pre-run [2018-10-26 20:45:18,327 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-26 20:45:18,339 INFO L193 MainTranslator]: Completed translation [2018-10-26 20:45:18,339 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:45:18 WrapperNode [2018-10-26 20:45:18,339 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-26 20:45:18,340 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-26 20:45:18,340 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-26 20:45:18,340 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-26 20:45:18,348 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:45:18" (1/1) ... [2018-10-26 20:45:18,353 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:45:18" (1/1) ... [2018-10-26 20:45:18,358 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-26 20:45:18,359 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-26 20:45:18,359 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-26 20:45:18,359 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-26 20:45:18,367 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:45:18" (1/1) ... [2018-10-26 20:45:18,367 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:45:18" (1/1) ... [2018-10-26 20:45:18,368 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:45:18" (1/1) ... [2018-10-26 20:45:18,368 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:45:18" (1/1) ... [2018-10-26 20:45:18,371 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:45:18" (1/1) ... [2018-10-26 20:45:18,373 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:45:18" (1/1) ... [2018-10-26 20:45:18,373 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:45:18" (1/1) ... [2018-10-26 20:45:18,375 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-26 20:45:18,375 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-26 20:45:18,375 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-26 20:45:18,376 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-26 20:45:18,376 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:45:18" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_9e8076ce-b8cf-436b-8298-c40c92fd0814/bin-2019/utaipan/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 [2018-10-26 20:45:18,527 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-10-26 20:45:18,528 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-10-26 20:45:18,528 INFO L130 BoogieDeclarations]: Found specification of procedure hanoi [2018-10-26 20:45:18,528 INFO L138 BoogieDeclarations]: Found implementation of procedure hanoi [2018-10-26 20:45:18,528 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-26 20:45:18,528 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-26 20:45:18,528 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-10-26 20:45:18,528 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-10-26 20:45:18,750 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-26 20:45:18,751 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 08:45:18 BoogieIcfgContainer [2018-10-26 20:45:18,751 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-26 20:45:18,752 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-26 20:45:18,752 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-26 20:45:18,756 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-26 20:45:18,756 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 08:45:18" (1/3) ... [2018-10-26 20:45:18,757 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ad9226c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 08:45:18, skipping insertion in model container [2018-10-26 20:45:18,757 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:45:18" (2/3) ... [2018-10-26 20:45:18,757 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ad9226c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 08:45:18, skipping insertion in model container [2018-10-26 20:45:18,757 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 08:45:18" (3/3) ... [2018-10-26 20:45:18,759 INFO L112 eAbstractionObserver]: Analyzing ICFG recHanoi03_false-unreach-call_true-termination.c [2018-10-26 20:45:18,767 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-26 20:45:18,773 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-26 20:45:18,786 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-26 20:45:18,813 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-26 20:45:18,813 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-26 20:45:18,813 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-26 20:45:18,813 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-26 20:45:18,813 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-26 20:45:18,813 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-26 20:45:18,813 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-26 20:45:18,813 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-26 20:45:18,828 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2018-10-26 20:45:18,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-10-26 20:45:18,833 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 20:45:18,834 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 20:45:18,836 INFO L424 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 20:45:18,841 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 20:45:18,841 INFO L82 PathProgramCache]: Analyzing trace with hash 913793727, now seen corresponding path program 1 times [2018-10-26 20:45:18,850 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-26 20:45:18,916 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 20:45:18,916 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 20:45:18,916 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 20:45:18,916 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-26 20:45:18,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-10-26 20:45:18,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-10-26 20:45:18,970 INFO L442 BasicCegarLoop]: Counterexample might be feasible [2018-10-26 20:45:18,993 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.10 08:45:18 BoogieIcfgContainer [2018-10-26 20:45:18,993 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-26 20:45:18,994 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-10-26 20:45:18,994 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-10-26 20:45:18,994 INFO L276 PluginConnector]: Witness Printer initialized [2018-10-26 20:45:18,994 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 08:45:18" (3/4) ... [2018-10-26 20:45:18,998 INFO L147 WitnessPrinter]: No result that supports witness generation found [2018-10-26 20:45:18,998 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-10-26 20:45:18,999 INFO L168 Benchmark]: Toolchain (without parser) took 846.44 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 159.4 MB). Free memory was 961.2 MB in the beginning and 1.1 GB in the end (delta: -170.9 MB). There was no memory consumed. Max. memory is 11.5 GB. [2018-10-26 20:45:19,000 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 1.0 GB. Free memory is still 985.3 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-10-26 20:45:19,001 INFO L168 Benchmark]: CACSL2BoogieTranslator took 185.36 ms. Allocated memory is still 1.0 GB. Free memory was 961.2 MB in the beginning and 950.4 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-10-26 20:45:19,002 INFO L168 Benchmark]: Boogie Procedure Inliner took 18.45 ms. Allocated memory is still 1.0 GB. Free memory is still 950.4 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-10-26 20:45:19,002 INFO L168 Benchmark]: Boogie Preprocessor took 16.39 ms. Allocated memory is still 1.0 GB. Free memory was 950.4 MB in the beginning and 947.7 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. [2018-10-26 20:45:19,003 INFO L168 Benchmark]: RCFGBuilder took 375.91 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 159.4 MB). Free memory was 947.7 MB in the beginning and 1.1 GB in the end (delta: -201.7 MB). Peak memory consumption was 21.1 MB. Max. memory is 11.5 GB. [2018-10-26 20:45:19,004 INFO L168 Benchmark]: TraceAbstraction took 241.33 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 17.4 MB). Peak memory consumption was 17.4 MB. Max. memory is 11.5 GB. [2018-10-26 20:45:19,005 INFO L168 Benchmark]: Witness Printer took 4.62 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2018-10-26 20:45:19,009 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 1.0 GB. Free memory is still 985.3 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 185.36 ms. Allocated memory is still 1.0 GB. Free memory was 961.2 MB in the beginning and 950.4 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 18.45 ms. Allocated memory is still 1.0 GB. Free memory is still 950.4 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 16.39 ms. Allocated memory is still 1.0 GB. Free memory was 950.4 MB in the beginning and 947.7 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. * RCFGBuilder took 375.91 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 159.4 MB). Free memory was 947.7 MB in the beginning and 1.1 GB in the end (delta: -201.7 MB). Peak memory consumption was 21.1 MB. Max. memory is 11.5 GB. * TraceAbstraction took 241.33 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 17.4 MB). Peak memory consumption was 17.4 MB. Max. memory is 11.5 GB. * Witness Printer took 4.62 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 34]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of shiftLeft at line 31. Possible FailurePath: [L25] int n = __VERIFIER_nondet_int(); [L26] COND FALSE !(n < 1) VAL [n=1] [L29] CALL, EXPR hanoi(n) VAL [\old(n)=1] [L17] COND TRUE n == 1 [L18] RET return 1; VAL [\old(n)=1, \result=1, n=1] [L29] EXPR hanoi(n) VAL [hanoi(n)=1, n=1] [L29] unsigned result = hanoi(n); [L31] COND FALSE !(result+1>0 && result+1 == 1< main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/working_dir_9e8076ce-b8cf-436b-8298-c40c92fd0814/bin-2019/utaipan 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 -> Taipan 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 -> 9cd87c15c4637a3ecd407847e5a675763d5fece5 [2018-10-26 20:45:20,944 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-26 20:45:20,953 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-26 20:45:20,956 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-26 20:45:20,957 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-26 20:45:20,957 INFO L276 PluginConnector]: CDTParser initialized [2018-10-26 20:45:20,958 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_9e8076ce-b8cf-436b-8298-c40c92fd0814/bin-2019/utaipan/../../sv-benchmarks/c/bitvector-regression/recHanoi03_false-unreach-call_true-termination.c [2018-10-26 20:45:21,001 INFO L218 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_9e8076ce-b8cf-436b-8298-c40c92fd0814/bin-2019/utaipan/data/ab7149f73/def12424578444f99ff94c38200983c0/FLAGb337bdfb5 [2018-10-26 20:45:21,408 INFO L298 CDTParser]: Found 1 translation units. [2018-10-26 20:45:21,410 INFO L158 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_9e8076ce-b8cf-436b-8298-c40c92fd0814/sv-benchmarks/c/bitvector-regression/recHanoi03_false-unreach-call_true-termination.c [2018-10-26 20:45:21,418 INFO L346 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_9e8076ce-b8cf-436b-8298-c40c92fd0814/bin-2019/utaipan/data/ab7149f73/def12424578444f99ff94c38200983c0/FLAGb337bdfb5 [2018-10-26 20:45:21,434 INFO L354 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_9e8076ce-b8cf-436b-8298-c40c92fd0814/bin-2019/utaipan/data/ab7149f73/def12424578444f99ff94c38200983c0 [2018-10-26 20:45:21,436 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-26 20:45:21,437 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-10-26 20:45:21,438 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-26 20:45:21,438 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-26 20:45:21,441 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-26 20:45:21,446 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 08:45:21" (1/1) ... [2018-10-26 20:45:21,448 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@27b2785 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:45:21, skipping insertion in model container [2018-10-26 20:45:21,448 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 08:45:21" (1/1) ... [2018-10-26 20:45:21,457 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-26 20:45:21,476 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-26 20:45:21,637 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-26 20:45:21,642 INFO L189 MainTranslator]: Completed pre-run [2018-10-26 20:45:21,655 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-26 20:45:21,668 INFO L193 MainTranslator]: Completed translation [2018-10-26 20:45:21,668 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:45:21 WrapperNode [2018-10-26 20:45:21,668 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-26 20:45:21,669 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-26 20:45:21,669 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-26 20:45:21,669 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-26 20:45:21,677 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:45:21" (1/1) ... [2018-10-26 20:45:21,683 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:45:21" (1/1) ... [2018-10-26 20:45:21,688 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-26 20:45:21,689 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-26 20:45:21,689 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-26 20:45:21,689 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-26 20:45:21,697 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:45:21" (1/1) ... [2018-10-26 20:45:21,698 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:45:21" (1/1) ... [2018-10-26 20:45:21,698 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:45:21" (1/1) ... [2018-10-26 20:45:21,699 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:45:21" (1/1) ... [2018-10-26 20:45:21,701 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:45:21" (1/1) ... [2018-10-26 20:45:21,704 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:45:21" (1/1) ... [2018-10-26 20:45:21,705 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:45:21" (1/1) ... [2018-10-26 20:45:21,707 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-26 20:45:21,707 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-26 20:45:21,707 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-26 20:45:21,707 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-26 20:45:21,708 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:45:21" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_9e8076ce-b8cf-436b-8298-c40c92fd0814/bin-2019/utaipan/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 [2018-10-26 20:45:21,753 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-10-26 20:45:21,753 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-10-26 20:45:21,753 INFO L130 BoogieDeclarations]: Found specification of procedure hanoi [2018-10-26 20:45:21,753 INFO L138 BoogieDeclarations]: Found implementation of procedure hanoi [2018-10-26 20:45:21,754 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-26 20:45:21,754 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-26 20:45:21,754 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-10-26 20:45:21,754 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-10-26 20:45:22,117 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-26 20:45:22,117 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 08:45:22 BoogieIcfgContainer [2018-10-26 20:45:22,117 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-26 20:45:22,118 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-26 20:45:22,118 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-26 20:45:22,121 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-26 20:45:22,121 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 08:45:21" (1/3) ... [2018-10-26 20:45:22,134 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24942e2b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 08:45:22, skipping insertion in model container [2018-10-26 20:45:22,134 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:45:21" (2/3) ... [2018-10-26 20:45:22,135 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24942e2b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 08:45:22, skipping insertion in model container [2018-10-26 20:45:22,135 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 08:45:22" (3/3) ... [2018-10-26 20:45:22,136 INFO L112 eAbstractionObserver]: Analyzing ICFG recHanoi03_false-unreach-call_true-termination.c [2018-10-26 20:45:22,154 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-26 20:45:22,161 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-26 20:45:22,177 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-26 20:45:22,201 INFO L135 ementStrategyFactory]: Using default assertion order modulation [2018-10-26 20:45:22,202 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-26 20:45:22,202 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-26 20:45:22,202 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-26 20:45:22,202 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-26 20:45:22,202 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-26 20:45:22,203 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-26 20:45:22,203 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-26 20:45:22,203 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-26 20:45:22,218 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2018-10-26 20:45:22,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-10-26 20:45:22,223 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 20:45:22,224 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 20:45:22,227 INFO L424 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 20:45:22,231 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 20:45:22,231 INFO L82 PathProgramCache]: Analyzing trace with hash 913793727, now seen corresponding path program 1 times [2018-10-26 20:45:22,234 INFO L225 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-10-26 20:45:22,234 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_9e8076ce-b8cf-436b-8298-c40c92fd0814/bin-2019/utaipan/cvc4nyu Starting monitored process 2 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk [2018-10-26 20:45:22,267 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 20:45:22,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 20:45:22,304 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 20:45:22,470 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 20:45:22,471 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-10-26 20:45:22,479 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-26 20:45:22,480 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2018-10-26 20:45:22,483 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-26 20:45:22,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-26 20:45:22,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2018-10-26 20:45:22,496 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 7 states. [2018-10-26 20:45:22,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 20:45:22,848 INFO L93 Difference]: Finished difference Result 35 states and 39 transitions. [2018-10-26 20:45:22,849 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-26 20:45:22,850 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 14 [2018-10-26 20:45:22,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 20:45:22,857 INFO L225 Difference]: With dead ends: 35 [2018-10-26 20:45:22,857 INFO L226 Difference]: Without dead ends: 19 [2018-10-26 20:45:22,860 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2018-10-26 20:45:22,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-10-26 20:45:22,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-10-26 20:45:22,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-10-26 20:45:22,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2018-10-26 20:45:22,896 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 14 [2018-10-26 20:45:22,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 20:45:22,897 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2018-10-26 20:45:22,897 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-26 20:45:22,897 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2018-10-26 20:45:22,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-10-26 20:45:22,899 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 20:45:22,899 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 20:45:22,900 INFO L424 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 20:45:22,900 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 20:45:22,900 INFO L82 PathProgramCache]: Analyzing trace with hash -1998834103, now seen corresponding path program 1 times [2018-10-26 20:45:22,900 INFO L225 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-10-26 20:45:22,901 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_9e8076ce-b8cf-436b-8298-c40c92fd0814/bin-2019/utaipan/cvc4nyu Starting monitored process 3 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk [2018-10-26 20:45:22,921 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 20:45:22,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 20:45:22,940 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 20:45:23,095 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-10-26 20:45:23,096 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-26 20:45:24,295 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-10-26 20:45:24,296 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 20:45:24,297 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FPBP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_9e8076ce-b8cf-436b-8298-c40c92fd0814/bin-2019/utaipan/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 20:45:24,304 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 20:45:24,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 20:45:24,316 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 20:45:24,332 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-10-26 20:45:24,332 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-26 20:45:24,599 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-10-26 20:45:24,624 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2018-10-26 20:45:24,624 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9] total 16 [2018-10-26 20:45:24,625 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-10-26 20:45:24,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-10-26 20:45:24,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2018-10-26 20:45:24,626 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand 16 states. [2018-10-26 20:45:25,039 WARN L179 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2018-10-26 20:45:25,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 20:45:25,226 INFO L93 Difference]: Finished difference Result 31 states and 33 transitions. [2018-10-26 20:45:25,226 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-10-26 20:45:25,227 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2018-10-26 20:45:25,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 20:45:25,228 INFO L225 Difference]: With dead ends: 31 [2018-10-26 20:45:25,228 INFO L226 Difference]: Without dead ends: 25 [2018-10-26 20:45:25,229 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 57 SyntacticMatches, 7 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2018-10-26 20:45:25,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-10-26 20:45:25,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-10-26 20:45:25,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-10-26 20:45:25,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2018-10-26 20:45:25,235 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 20 [2018-10-26 20:45:25,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 20:45:25,235 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2018-10-26 20:45:25,235 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-10-26 20:45:25,236 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2018-10-26 20:45:25,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-10-26 20:45:25,236 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 20:45:25,237 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 20:45:25,237 INFO L424 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 20:45:25,237 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 20:45:25,237 INFO L82 PathProgramCache]: Analyzing trace with hash -547108535, now seen corresponding path program 2 times [2018-10-26 20:45:25,239 INFO L225 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-10-26 20:45:25,239 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_9e8076ce-b8cf-436b-8298-c40c92fd0814/bin-2019/utaipan/cvc4nyu Starting monitored process 5 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk [2018-10-26 20:45:25,261 INFO L101 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2018-10-26 20:45:25,296 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-26 20:45:25,296 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 20:45:25,300 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 20:45:25,533 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-10-26 20:45:25,533 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-26 20:45:26,460 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-10-26 20:45:26,466 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 20:45:26,466 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FPBP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_9e8076ce-b8cf-436b-8298-c40c92fd0814/bin-2019/utaipan/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 20:45:26,483 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-26 20:45:26,499 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-26 20:45:26,499 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 20:45:26,501 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 20:45:26,512 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-10-26 20:45:26,512 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-26 20:45:27,125 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-10-26 20:45:27,143 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2018-10-26 20:45:27,143 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15, 13, 15] total 26 [2018-10-26 20:45:27,144 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-10-26 20:45:27,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-10-26 20:45:27,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=569, Unknown=0, NotChecked=0, Total=650 [2018-10-26 20:45:27,144 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand 26 states. [2018-10-26 20:45:27,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 20:45:27,928 INFO L93 Difference]: Finished difference Result 37 states and 39 transitions. [2018-10-26 20:45:27,929 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-10-26 20:45:27,929 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 32 [2018-10-26 20:45:27,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 20:45:27,930 INFO L225 Difference]: With dead ends: 37 [2018-10-26 20:45:27,931 INFO L226 Difference]: Without dead ends: 31 [2018-10-26 20:45:27,931 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 93 SyntacticMatches, 9 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=182, Invalid=1150, Unknown=0, NotChecked=0, Total=1332 [2018-10-26 20:45:27,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-10-26 20:45:27,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2018-10-26 20:45:27,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-10-26 20:45:27,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2018-10-26 20:45:27,937 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 32 [2018-10-26 20:45:27,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 20:45:27,938 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions. [2018-10-26 20:45:27,938 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-10-26 20:45:27,938 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions. [2018-10-26 20:45:27,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-10-26 20:45:27,939 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 20:45:27,939 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 20:45:27,939 INFO L424 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 20:45:27,941 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 20:45:27,941 INFO L82 PathProgramCache]: Analyzing trace with hash 1461718089, now seen corresponding path program 3 times [2018-10-26 20:45:27,941 INFO L225 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-10-26 20:45:27,942 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_9e8076ce-b8cf-436b-8298-c40c92fd0814/bin-2019/utaipan/cvc4nyu Starting monitored process 7 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk [2018-10-26 20:45:27,957 INFO L101 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2018-10-26 20:45:28,039 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-10-26 20:45:28,040 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 20:45:28,045 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 20:45:28,322 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2018-10-26 20:45:28,322 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-26 20:45:29,883 WARN L179 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2018-10-26 20:45:30,287 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-10-26 20:45:30,299 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 20:45:30,299 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FPBP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_9e8076ce-b8cf-436b-8298-c40c92fd0814/bin-2019/utaipan/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 20:45:30,306 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-26 20:45:30,334 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-10-26 20:45:30,334 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 20:45:30,338 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 20:45:30,399 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2018-10-26 20:45:30,399 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-26 20:45:31,086 WARN L179 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2018-10-26 20:45:31,444 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-10-26 20:45:31,461 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2018-10-26 20:45:31,462 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 21, 18, 21] total 37 [2018-10-26 20:45:31,462 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-10-26 20:45:31,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-10-26 20:45:31,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=1204, Unknown=0, NotChecked=0, Total=1332 [2018-10-26 20:45:31,463 INFO L87 Difference]: Start difference. First operand 31 states and 32 transitions. Second operand 37 states. [2018-10-26 20:45:32,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 20:45:32,391 INFO L93 Difference]: Finished difference Result 43 states and 45 transitions. [2018-10-26 20:45:32,392 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-10-26 20:45:32,392 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 44 [2018-10-26 20:45:32,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 20:45:32,393 INFO L225 Difference]: With dead ends: 43 [2018-10-26 20:45:32,393 INFO L226 Difference]: Without dead ends: 37 [2018-10-26 20:45:32,394 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 120 SyntacticMatches, 19 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 468 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=310, Invalid=2342, Unknown=0, NotChecked=0, Total=2652 [2018-10-26 20:45:32,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-10-26 20:45:32,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2018-10-26 20:45:32,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-10-26 20:45:32,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2018-10-26 20:45:32,402 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 44 [2018-10-26 20:45:32,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 20:45:32,402 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2018-10-26 20:45:32,402 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-10-26 20:45:32,402 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2018-10-26 20:45:32,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-10-26 20:45:32,403 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 20:45:32,404 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 20:45:32,405 INFO L424 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 20:45:32,405 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 20:45:32,405 INFO L82 PathProgramCache]: Analyzing trace with hash 585432905, now seen corresponding path program 4 times [2018-10-26 20:45:32,406 INFO L225 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-10-26 20:45:32,406 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_9e8076ce-b8cf-436b-8298-c40c92fd0814/bin-2019/utaipan/cvc4nyu Starting monitored process 9 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk [2018-10-26 20:45:32,424 INFO L101 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-26 20:45:32,453 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-26 20:45:32,454 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 20:45:32,458 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 20:45:32,685 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2018-10-26 20:45:32,686 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-26 20:45:33,902 WARN L179 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2018-10-26 20:45:34,062 WARN L179 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2018-10-26 20:45:35,907 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2018-10-26 20:45:35,908 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 20:45:35,908 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FPBP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_9e8076ce-b8cf-436b-8298-c40c92fd0814/bin-2019/utaipan/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 20:45:35,920 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-26 20:45:35,939 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-26 20:45:35,939 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 20:45:35,942 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 20:45:35,960 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2018-10-26 20:45:35,960 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-26 20:45:36,393 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2018-10-26 20:45:36,594 WARN L179 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2018-10-26 20:45:37,661 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2018-10-26 20:45:37,678 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2018-10-26 20:45:37,678 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 27, 21, 27] total 46 [2018-10-26 20:45:37,679 INFO L460 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-10-26 20:45:37,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-10-26 20:45:37,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=1913, Unknown=0, NotChecked=0, Total=2070 [2018-10-26 20:45:37,680 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand 46 states. [2018-10-26 20:45:38,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 20:45:38,965 INFO L93 Difference]: Finished difference Result 49 states and 51 transitions. [2018-10-26 20:45:38,966 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-10-26 20:45:38,967 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 56 [2018-10-26 20:45:38,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 20:45:38,967 INFO L225 Difference]: With dead ends: 49 [2018-10-26 20:45:38,967 INFO L226 Difference]: Without dead ends: 43 [2018-10-26 20:45:38,968 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 160 SyntacticMatches, 18 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 691 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=414, Invalid=3746, Unknown=0, NotChecked=0, Total=4160 [2018-10-26 20:45:38,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-10-26 20:45:38,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2018-10-26 20:45:38,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-10-26 20:45:38,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 44 transitions. [2018-10-26 20:45:38,973 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 44 transitions. Word has length 56 [2018-10-26 20:45:38,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 20:45:38,973 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 44 transitions. [2018-10-26 20:45:38,974 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-10-26 20:45:38,974 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 44 transitions. [2018-10-26 20:45:38,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-10-26 20:45:38,975 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 20:45:38,975 INFO L375 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 20:45:38,975 INFO L424 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 20:45:38,975 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 20:45:38,975 INFO L82 PathProgramCache]: Analyzing trace with hash 579248713, now seen corresponding path program 5 times [2018-10-26 20:45:38,976 INFO L225 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-10-26 20:45:38,976 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_9e8076ce-b8cf-436b-8298-c40c92fd0814/bin-2019/utaipan/cvc4nyu Starting monitored process 11 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk [2018-10-26 20:45:38,994 INFO L101 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2018-10-26 20:45:39,118 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2018-10-26 20:45:39,119 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 20:45:39,125 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 20:45:40,129 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2018-10-26 20:45:40,129 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-26 20:45:41,814 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2018-10-26 20:45:44,584 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 207 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2018-10-26 20:45:44,586 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 20:45:44,586 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FPBP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_9e8076ce-b8cf-436b-8298-c40c92fd0814/bin-2019/utaipan/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 20:45:44,592 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-26 20:45:44,626 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2018-10-26 20:45:44,626 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 20:45:44,629 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 20:45:44,642 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2018-10-26 20:45:44,642 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-26 20:45:46,922 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 207 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2018-10-26 20:45:46,940 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2018-10-26 20:45:46,940 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 33, 25, 33] total 56 [2018-10-26 20:45:46,941 INFO L460 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-10-26 20:45:46,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-10-26 20:45:46,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=2885, Unknown=0, NotChecked=0, Total=3080 [2018-10-26 20:45:46,941 INFO L87 Difference]: Start difference. First operand 43 states and 44 transitions. Second operand 56 states. [2018-10-26 20:45:48,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 20:45:48,721 INFO L93 Difference]: Finished difference Result 55 states and 57 transitions. [2018-10-26 20:45:48,722 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-10-26 20:45:48,722 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 68 [2018-10-26 20:45:48,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 20:45:48,723 INFO L225 Difference]: With dead ends: 55 [2018-10-26 20:45:48,723 INFO L226 Difference]: Without dead ends: 49 [2018-10-26 20:45:48,725 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 293 GetRequests, 194 SyntacticMatches, 22 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1050 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=554, Invalid=5608, Unknown=0, NotChecked=0, Total=6162 [2018-10-26 20:45:48,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-10-26 20:45:48,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2018-10-26 20:45:48,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-10-26 20:45:48,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 50 transitions. [2018-10-26 20:45:48,731 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 50 transitions. Word has length 68 [2018-10-26 20:45:48,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 20:45:48,732 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 50 transitions. [2018-10-26 20:45:48,732 INFO L482 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-10-26 20:45:48,732 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 50 transitions. [2018-10-26 20:45:48,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-10-26 20:45:48,733 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 20:45:48,733 INFO L375 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 20:45:48,733 INFO L424 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 20:45:48,733 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 20:45:48,733 INFO L82 PathProgramCache]: Analyzing trace with hash 584643913, now seen corresponding path program 6 times [2018-10-26 20:45:48,734 INFO L225 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-10-26 20:45:48,734 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_9e8076ce-b8cf-436b-8298-c40c92fd0814/bin-2019/utaipan/cvc4nyu Starting monitored process 13 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk [2018-10-26 20:45:48,748 INFO L101 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2018-10-26 20:45:48,968 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2018-10-26 20:45:48,968 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 20:45:48,979 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 20:45:49,575 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2018-10-26 20:45:49,575 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-26 20:45:54,666 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 308 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2018-10-26 20:45:54,668 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 20:45:54,668 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FPBP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_9e8076ce-b8cf-436b-8298-c40c92fd0814/bin-2019/utaipan/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 20:45:54,675 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-26 20:45:54,723 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2018-10-26 20:45:54,723 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 20:45:54,727 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 20:45:54,746 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2018-10-26 20:45:54,747 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-26 20:45:57,593 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 308 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2018-10-26 20:45:57,609 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2018-10-26 20:45:57,610 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 39, 29, 39] total 66 [2018-10-26 20:45:57,610 INFO L460 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-10-26 20:45:57,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-10-26 20:45:57,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=4057, Unknown=0, NotChecked=0, Total=4290 [2018-10-26 20:45:57,611 INFO L87 Difference]: Start difference. First operand 49 states and 50 transitions. Second operand 66 states. [2018-10-26 20:45:59,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 20:45:59,914 INFO L93 Difference]: Finished difference Result 61 states and 63 transitions. [2018-10-26 20:45:59,915 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-10-26 20:45:59,915 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 80 [2018-10-26 20:45:59,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 20:45:59,916 INFO L225 Difference]: With dead ends: 61 [2018-10-26 20:45:59,916 INFO L226 Difference]: Without dead ends: 55 [2018-10-26 20:45:59,918 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 345 GetRequests, 228 SyntacticMatches, 26 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1341 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=710, Invalid=7846, Unknown=0, NotChecked=0, Total=8556 [2018-10-26 20:45:59,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-10-26 20:45:59,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2018-10-26 20:45:59,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-10-26 20:45:59,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 56 transitions. [2018-10-26 20:45:59,924 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 56 transitions. Word has length 80 [2018-10-26 20:45:59,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 20:45:59,925 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 56 transitions. [2018-10-26 20:45:59,925 INFO L482 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-10-26 20:45:59,925 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 56 transitions. [2018-10-26 20:45:59,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2018-10-26 20:45:59,928 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 20:45:59,928 INFO L375 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 20:45:59,928 INFO L424 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 20:45:59,928 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 20:45:59,928 INFO L82 PathProgramCache]: Analyzing trace with hash 498071625, now seen corresponding path program 7 times [2018-10-26 20:45:59,929 INFO L225 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-10-26 20:45:59,929 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_9e8076ce-b8cf-436b-8298-c40c92fd0814/bin-2019/utaipan/cvc4nyu Starting monitored process 15 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk [2018-10-26 20:45:59,941 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 20:45:59,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 20:45:59,996 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 20:46:00,589 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2018-10-26 20:46:00,589 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-26 20:46:01,538 WARN L179 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2018-10-26 20:46:03,379 WARN L179 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2018-10-26 20:46:03,542 WARN L179 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2018-10-26 20:46:03,746 WARN L179 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2018-10-26 20:46:07,672 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 429 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2018-10-26 20:46:07,673 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 20:46:07,673 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FPBP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_9e8076ce-b8cf-436b-8298-c40c92fd0814/bin-2019/utaipan/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 20:46:07,679 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 20:46:07,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 20:46:07,705 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 20:46:07,717 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2018-10-26 20:46:07,717 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-26 20:46:10,346 WARN L179 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2018-10-26 20:46:10,542 WARN L179 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2018-10-26 20:46:10,646 WARN L179 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2018-10-26 20:46:11,542 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 429 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2018-10-26 20:46:11,559 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2018-10-26 20:46:11,559 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 45, 33, 45] total 76 [2018-10-26 20:46:11,559 INFO L460 AbstractCegarLoop]: Interpolant automaton has 76 states [2018-10-26 20:46:11,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2018-10-26 20:46:11,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=271, Invalid=5429, Unknown=0, NotChecked=0, Total=5700 [2018-10-26 20:46:11,561 INFO L87 Difference]: Start difference. First operand 55 states and 56 transitions. Second operand 76 states. [2018-10-26 20:46:14,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 20:46:14,290 INFO L93 Difference]: Finished difference Result 67 states and 69 transitions. [2018-10-26 20:46:14,291 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-10-26 20:46:14,292 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 92 [2018-10-26 20:46:14,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 20:46:14,293 INFO L225 Difference]: With dead ends: 67 [2018-10-26 20:46:14,293 INFO L226 Difference]: Without dead ends: 61 [2018-10-26 20:46:14,295 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 397 GetRequests, 261 SyntacticMatches, 31 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1702 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=882, Invalid=10460, Unknown=0, NotChecked=0, Total=11342 [2018-10-26 20:46:14,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-10-26 20:46:14,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2018-10-26 20:46:14,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-10-26 20:46:14,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 62 transitions. [2018-10-26 20:46:14,303 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 62 transitions. Word has length 92 [2018-10-26 20:46:14,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 20:46:14,303 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 62 transitions. [2018-10-26 20:46:14,303 INFO L482 AbstractCegarLoop]: Interpolant automaton has 76 states. [2018-10-26 20:46:14,303 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 62 transitions. [2018-10-26 20:46:14,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2018-10-26 20:46:14,304 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 20:46:14,305 INFO L375 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 20:46:14,305 INFO L424 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 20:46:14,305 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 20:46:14,305 INFO L82 PathProgramCache]: Analyzing trace with hash 2044701513, now seen corresponding path program 8 times [2018-10-26 20:46:14,305 INFO L225 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-10-26 20:46:14,308 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_9e8076ce-b8cf-436b-8298-c40c92fd0814/bin-2019/utaipan/cvc4nyu Starting monitored process 17 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk [2018-10-26 20:46:14,320 INFO L101 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2018-10-26 20:46:14,404 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-26 20:46:14,404 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 20:46:14,417 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 20:46:15,107 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2018-10-26 20:46:15,107 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-26 20:46:23,379 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 570 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2018-10-26 20:46:23,380 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 20:46:23,380 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FPBP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_9e8076ce-b8cf-436b-8298-c40c92fd0814/bin-2019/utaipan/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 20:46:23,386 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-26 20:46:23,411 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-26 20:46:23,411 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 20:46:23,415 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 20:46:23,429 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2018-10-26 20:46:23,429 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-26 20:46:27,899 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 570 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2018-10-26 20:46:27,916 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2018-10-26 20:46:27,916 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 51, 37, 51] total 86 [2018-10-26 20:46:27,917 INFO L460 AbstractCegarLoop]: Interpolant automaton has 86 states [2018-10-26 20:46:27,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2018-10-26 20:46:27,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=309, Invalid=7001, Unknown=0, NotChecked=0, Total=7310 [2018-10-26 20:46:27,918 INFO L87 Difference]: Start difference. First operand 61 states and 62 transitions. Second operand 86 states. [2018-10-26 20:46:31,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 20:46:31,396 INFO L93 Difference]: Finished difference Result 73 states and 75 transitions. [2018-10-26 20:46:31,397 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-10-26 20:46:31,397 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 104 [2018-10-26 20:46:31,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 20:46:31,398 INFO L225 Difference]: With dead ends: 73 [2018-10-26 20:46:31,398 INFO L226 Difference]: Without dead ends: 67 [2018-10-26 20:46:31,400 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 449 GetRequests, 301 SyntacticMatches, 29 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2245 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=1070, Invalid=13450, Unknown=0, NotChecked=0, Total=14520 [2018-10-26 20:46:31,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-10-26 20:46:31,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2018-10-26 20:46:31,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2018-10-26 20:46:31,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 68 transitions. [2018-10-26 20:46:31,409 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 68 transitions. Word has length 104 [2018-10-26 20:46:31,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 20:46:31,409 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 68 transitions. [2018-10-26 20:46:31,409 INFO L482 AbstractCegarLoop]: Interpolant automaton has 86 states. [2018-10-26 20:46:31,409 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 68 transitions. [2018-10-26 20:46:31,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2018-10-26 20:46:31,412 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 20:46:31,412 INFO L375 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 20:46:31,412 INFO L424 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 20:46:31,412 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 20:46:31,413 INFO L82 PathProgramCache]: Analyzing trace with hash 1262227017, now seen corresponding path program 9 times [2018-10-26 20:46:31,413 INFO L225 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-10-26 20:46:31,413 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_9e8076ce-b8cf-436b-8298-c40c92fd0814/bin-2019/utaipan/cvc4nyu Starting monitored process 19 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk [2018-10-26 20:46:31,426 INFO L101 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2018-10-26 20:46:31,955 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2018-10-26 20:46:31,955 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 20:46:31,971 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 20:46:32,815 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2018-10-26 20:46:32,816 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-26 20:46:42,860 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 731 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2018-10-26 20:46:42,862 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 20:46:42,862 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FPBP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_9e8076ce-b8cf-436b-8298-c40c92fd0814/bin-2019/utaipan/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 20:46:42,870 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-26 20:46:42,949 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2018-10-26 20:46:42,949 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 20:46:42,953 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 20:46:43,062 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 2 proven. 456 refuted. 0 times theorem prover too weak. 426 trivial. 0 not checked. [2018-10-26 20:46:43,062 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-26 20:46:48,394 WARN L179 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2018-10-26 20:46:49,601 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 731 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2018-10-26 20:46:49,619 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2018-10-26 20:46:49,619 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 57, 42, 57] total 97 [2018-10-26 20:46:49,619 INFO L460 AbstractCegarLoop]: Interpolant automaton has 97 states [2018-10-26 20:46:49,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2018-10-26 20:46:49,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=368, Invalid=8944, Unknown=0, NotChecked=0, Total=9312 [2018-10-26 20:46:49,621 INFO L87 Difference]: Start difference. First operand 67 states and 68 transitions. Second operand 97 states. [2018-10-26 20:46:53,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 20:46:53,353 INFO L93 Difference]: Finished difference Result 79 states and 81 transitions. [2018-10-26 20:46:53,354 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-10-26 20:46:53,354 INFO L78 Accepts]: Start accepts. Automaton has 97 states. Word has length 116 [2018-10-26 20:46:53,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 20:46:53,355 INFO L225 Difference]: With dead ends: 79 [2018-10-26 20:46:53,355 INFO L226 Difference]: Without dead ends: 73 [2018-10-26 20:46:53,359 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 501 GetRequests, 332 SyntacticMatches, 35 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3184 ImplicationChecksByTransitivity, 9.4s TimeCoverageRelationStatistics Valid=1330, Invalid=17030, Unknown=0, NotChecked=0, Total=18360 [2018-10-26 20:46:53,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2018-10-26 20:46:53,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2018-10-26 20:46:53,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2018-10-26 20:46:53,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 74 transitions. [2018-10-26 20:46:53,366 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 74 transitions. Word has length 116 [2018-10-26 20:46:53,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 20:46:53,367 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 74 transitions. [2018-10-26 20:46:53,367 INFO L482 AbstractCegarLoop]: Interpolant automaton has 97 states. [2018-10-26 20:46:53,367 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 74 transitions. [2018-10-26 20:46:53,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2018-10-26 20:46:53,369 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 20:46:53,369 INFO L375 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 20:46:53,369 INFO L424 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 20:46:53,369 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 20:46:53,369 INFO L82 PathProgramCache]: Analyzing trace with hash -1835458231, now seen corresponding path program 10 times [2018-10-26 20:46:53,369 INFO L225 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-10-26 20:46:53,369 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_9e8076ce-b8cf-436b-8298-c40c92fd0814/bin-2019/utaipan/cvc4nyu Starting monitored process 21 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk [2018-10-26 20:46:53,384 INFO L101 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-26 20:46:53,463 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-26 20:46:53,463 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 20:46:53,485 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 20:46:54,471 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2018-10-26 20:46:54,472 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-26 20:47:06,809 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 912 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2018-10-26 20:47:06,810 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 20:47:06,811 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FPBP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_9e8076ce-b8cf-436b-8298-c40c92fd0814/bin-2019/utaipan/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 20:47:06,818 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-26 20:47:06,854 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-26 20:47:06,854 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 20:47:06,859 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 20:47:06,881 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2018-10-26 20:47:06,881 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-26 20:47:13,646 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 912 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2018-10-26 20:47:13,663 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2018-10-26 20:47:13,663 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 63, 45, 63] total 106 [2018-10-26 20:47:13,663 INFO L460 AbstractCegarLoop]: Interpolant automaton has 106 states [2018-10-26 20:47:13,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2018-10-26 20:47:13,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=385, Invalid=10745, Unknown=0, NotChecked=0, Total=11130 [2018-10-26 20:47:13,665 INFO L87 Difference]: Start difference. First operand 73 states and 74 transitions. Second operand 106 states. [2018-10-26 20:47:18,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 20:47:18,375 INFO L93 Difference]: Finished difference Result 85 states and 87 transitions. [2018-10-26 20:47:18,376 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-10-26 20:47:18,376 INFO L78 Accepts]: Start accepts. Automaton has 106 states. Word has length 128 [2018-10-26 20:47:18,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 20:47:18,377 INFO L225 Difference]: With dead ends: 85 [2018-10-26 20:47:18,377 INFO L226 Difference]: Without dead ends: 79 [2018-10-26 20:47:18,379 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 553 GetRequests, 374 SyntacticMatches, 32 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3385 ImplicationChecksByTransitivity, 10.2s TimeCoverageRelationStatistics Valid=1494, Invalid=20558, Unknown=0, NotChecked=0, Total=22052 [2018-10-26 20:47:18,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2018-10-26 20:47:18,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2018-10-26 20:47:18,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2018-10-26 20:47:18,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 80 transitions. [2018-10-26 20:47:18,383 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 80 transitions. Word has length 128 [2018-10-26 20:47:18,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 20:47:18,383 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 80 transitions. [2018-10-26 20:47:18,383 INFO L482 AbstractCegarLoop]: Interpolant automaton has 106 states. [2018-10-26 20:47:18,383 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 80 transitions. [2018-10-26 20:47:18,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2018-10-26 20:47:18,384 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 20:47:18,384 INFO L375 BasicCegarLoop]: trace histogram [22, 22, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 20:47:18,385 INFO L424 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 20:47:18,385 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 20:47:18,385 INFO L82 PathProgramCache]: Analyzing trace with hash 2110448713, now seen corresponding path program 11 times [2018-10-26 20:47:18,385 INFO L225 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-10-26 20:47:18,385 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_9e8076ce-b8cf-436b-8298-c40c92fd0814/bin-2019/utaipan/cvc4nyu Starting monitored process 23 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk [2018-10-26 20:47:18,419 INFO L101 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2018-10-26 20:47:19,104 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2018-10-26 20:47:19,104 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 20:47:19,137 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 20:47:20,274 INFO L134 CoverageAnalysis]: Checked inductivity of 1344 backedges. 0 proven. 672 refuted. 0 times theorem prover too weak. 672 trivial. 0 not checked. [2018-10-26 20:47:20,274 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-26 20:47:35,076 INFO L134 CoverageAnalysis]: Checked inductivity of 1344 backedges. 0 proven. 1113 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2018-10-26 20:47:35,078 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 20:47:35,078 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FPBP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_9e8076ce-b8cf-436b-8298-c40c92fd0814/bin-2019/utaipan/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 20:47:35,084 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-26 20:47:35,170 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2018-10-26 20:47:35,170 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 20:47:35,176 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 20:47:35,201 INFO L134 CoverageAnalysis]: Checked inductivity of 1344 backedges. 0 proven. 672 refuted. 0 times theorem prover too weak. 672 trivial. 0 not checked. [2018-10-26 20:47:35,201 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-26 20:47:41,565 WARN L179 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2018-10-26 20:47:43,556 INFO L134 CoverageAnalysis]: Checked inductivity of 1344 backedges. 0 proven. 1113 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2018-10-26 20:47:43,573 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2018-10-26 20:47:43,574 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 69, 49, 69] total 116 [2018-10-26 20:47:43,574 INFO L460 AbstractCegarLoop]: Interpolant automaton has 116 states [2018-10-26 20:47:43,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2018-10-26 20:47:43,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=423, Invalid=12917, Unknown=0, NotChecked=0, Total=13340 [2018-10-26 20:47:43,575 INFO L87 Difference]: Start difference. First operand 79 states and 80 transitions. Second operand 116 states. [2018-10-26 20:47:48,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 20:47:48,380 INFO L93 Difference]: Finished difference Result 91 states and 93 transitions. [2018-10-26 20:47:48,381 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-10-26 20:47:48,381 INFO L78 Accepts]: Start accepts. Automaton has 116 states. Word has length 140 [2018-10-26 20:47:48,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 20:47:48,382 INFO L225 Difference]: With dead ends: 91 [2018-10-26 20:47:48,382 INFO L226 Difference]: Without dead ends: 85 [2018-10-26 20:47:48,384 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 605 GetRequests, 400 SyntacticMatches, 44 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4138 ImplicationChecksByTransitivity, 12.2s TimeCoverageRelationStatistics Valid=1730, Invalid=24676, Unknown=0, NotChecked=0, Total=26406 [2018-10-26 20:47:48,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2018-10-26 20:47:48,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2018-10-26 20:47:48,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2018-10-26 20:47:48,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 86 transitions. [2018-10-26 20:47:48,389 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 86 transitions. Word has length 140 [2018-10-26 20:47:48,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 20:47:48,389 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 86 transitions. [2018-10-26 20:47:48,389 INFO L482 AbstractCegarLoop]: Interpolant automaton has 116 states. [2018-10-26 20:47:48,389 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 86 transitions. [2018-10-26 20:47:48,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2018-10-26 20:47:48,390 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 20:47:48,390 INFO L375 BasicCegarLoop]: trace histogram [24, 24, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 20:47:48,399 INFO L424 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 20:47:48,400 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 20:47:48,400 INFO L82 PathProgramCache]: Analyzing trace with hash -1482336439, now seen corresponding path program 12 times [2018-10-26 20:47:48,400 INFO L225 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-10-26 20:47:48,400 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_9e8076ce-b8cf-436b-8298-c40c92fd0814/bin-2019/utaipan/cvc4nyu Starting monitored process 25 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk [2018-10-26 20:47:48,421 INFO L101 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2018-10-26 20:47:49,383 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 24 check-sat command(s) [2018-10-26 20:47:49,383 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 20:47:49,417 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 20:47:50,676 INFO L134 CoverageAnalysis]: Checked inductivity of 1610 backedges. 0 proven. 805 refuted. 0 times theorem prover too weak. 805 trivial. 0 not checked. [2018-10-26 20:47:50,676 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-26 20:47:56,145 WARN L179 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2018-10-26 20:48:08,491 INFO L134 CoverageAnalysis]: Checked inductivity of 1610 backedges. 0 proven. 1334 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2018-10-26 20:48:08,493 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 20:48:08,493 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FPBP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_9e8076ce-b8cf-436b-8298-c40c92fd0814/bin-2019/utaipan/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 20:48:08,500 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-26 20:48:08,646 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 24 check-sat command(s) [2018-10-26 20:48:08,646 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 20:48:08,651 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 20:48:08,827 INFO L134 CoverageAnalysis]: Checked inductivity of 1610 backedges. 0 proven. 827 refuted. 0 times theorem prover too weak. 783 trivial. 0 not checked. [2018-10-26 20:48:08,827 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-26 20:48:13,158 WARN L179 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2018-10-26 20:48:18,868 INFO L134 CoverageAnalysis]: Checked inductivity of 1610 backedges. 0 proven. 1334 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2018-10-26 20:48:18,885 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2018-10-26 20:48:18,886 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 75, 54, 75] total 127 [2018-10-26 20:48:18,886 INFO L460 AbstractCegarLoop]: Interpolant automaton has 127 states [2018-10-26 20:48:18,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 127 interpolants. [2018-10-26 20:48:18,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=488, Invalid=15514, Unknown=0, NotChecked=0, Total=16002 [2018-10-26 20:48:18,887 INFO L87 Difference]: Start difference. First operand 85 states and 86 transitions. Second operand 127 states. [2018-10-26 20:48:25,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 20:48:25,044 INFO L93 Difference]: Finished difference Result 97 states and 99 transitions. [2018-10-26 20:48:25,044 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-10-26 20:48:25,045 INFO L78 Accepts]: Start accepts. Automaton has 127 states. Word has length 152 [2018-10-26 20:48:25,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 20:48:25,046 INFO L225 Difference]: With dead ends: 97 [2018-10-26 20:48:25,046 INFO L226 Difference]: Without dead ends: 91 [2018-10-26 20:48:25,047 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 657 GetRequests, 446 SyntacticMatches, 35 SemanticMatches, 176 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5173 ImplicationChecksByTransitivity, 14.8s TimeCoverageRelationStatistics Valid=2056, Invalid=29450, Unknown=0, NotChecked=0, Total=31506 [2018-10-26 20:48:25,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2018-10-26 20:48:25,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2018-10-26 20:48:25,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2018-10-26 20:48:25,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 92 transitions. [2018-10-26 20:48:25,052 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 92 transitions. Word has length 152 [2018-10-26 20:48:25,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 20:48:25,052 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 92 transitions. [2018-10-26 20:48:25,052 INFO L482 AbstractCegarLoop]: Interpolant automaton has 127 states. [2018-10-26 20:48:25,052 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 92 transitions. [2018-10-26 20:48:25,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2018-10-26 20:48:25,053 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 20:48:25,053 INFO L375 BasicCegarLoop]: trace histogram [26, 26, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 20:48:25,061 INFO L424 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 20:48:25,061 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 20:48:25,061 INFO L82 PathProgramCache]: Analyzing trace with hash 1476164169, now seen corresponding path program 13 times [2018-10-26 20:48:25,061 INFO L225 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-10-26 20:48:25,061 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_9e8076ce-b8cf-436b-8298-c40c92fd0814/bin-2019/utaipan/cvc4nyu Starting monitored process 27 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk [2018-10-26 20:48:25,074 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 20:48:25,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 20:48:25,180 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 20:48:26,626 INFO L134 CoverageAnalysis]: Checked inductivity of 1900 backedges. 0 proven. 950 refuted. 0 times theorem prover too weak. 950 trivial. 0 not checked. [2018-10-26 20:48:26,627 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-26 20:48:47,055 INFO L134 CoverageAnalysis]: Checked inductivity of 1900 backedges. 0 proven. 1575 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2018-10-26 20:48:47,056 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 20:48:47,057 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FPBP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_9e8076ce-b8cf-436b-8298-c40c92fd0814/bin-2019/utaipan/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 20:48:47,064 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 20:48:47,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 20:48:47,105 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 20:48:47,164 INFO L134 CoverageAnalysis]: Checked inductivity of 1900 backedges. 0 proven. 950 refuted. 0 times theorem prover too weak. 950 trivial. 0 not checked. [2018-10-26 20:48:47,165 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-26 20:48:57,354 WARN L179 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2018-10-26 20:48:58,847 INFO L134 CoverageAnalysis]: Checked inductivity of 1900 backedges. 0 proven. 1575 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2018-10-26 20:48:58,864 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2018-10-26 20:48:58,864 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 81, 57, 81] total 136 [2018-10-26 20:48:58,865 INFO L460 AbstractCegarLoop]: Interpolant automaton has 136 states [2018-10-26 20:48:58,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 136 interpolants. [2018-10-26 20:48:58,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=499, Invalid=17861, Unknown=0, NotChecked=0, Total=18360 [2018-10-26 20:48:58,866 INFO L87 Difference]: Start difference. First operand 91 states and 92 transitions. Second operand 136 states. [2018-10-26 20:49:05,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 20:49:05,474 INFO L93 Difference]: Finished difference Result 103 states and 105 transitions. [2018-10-26 20:49:05,475 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-10-26 20:49:05,475 INFO L78 Accepts]: Start accepts. Automaton has 136 states. Word has length 164 [2018-10-26 20:49:05,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 20:49:05,476 INFO L225 Difference]: With dead ends: 103 [2018-10-26 20:49:05,476 INFO L226 Difference]: Without dead ends: 97 [2018-10-26 20:49:05,478 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 709 GetRequests, 481 SyntacticMatches, 39 SemanticMatches, 189 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5798 ImplicationChecksByTransitivity, 16.4s TimeCoverageRelationStatistics Valid=2250, Invalid=34040, Unknown=0, NotChecked=0, Total=36290 [2018-10-26 20:49:05,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2018-10-26 20:49:05,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2018-10-26 20:49:05,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2018-10-26 20:49:05,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 98 transitions. [2018-10-26 20:49:05,484 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 98 transitions. Word has length 164 [2018-10-26 20:49:05,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 20:49:05,484 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 98 transitions. [2018-10-26 20:49:05,484 INFO L482 AbstractCegarLoop]: Interpolant automaton has 136 states. [2018-10-26 20:49:05,485 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 98 transitions. [2018-10-26 20:49:05,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2018-10-26 20:49:05,485 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 20:49:05,488 INFO L375 BasicCegarLoop]: trace histogram [28, 28, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 20:49:05,488 INFO L424 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 20:49:05,488 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 20:49:05,488 INFO L82 PathProgramCache]: Analyzing trace with hash -1012642487, now seen corresponding path program 14 times [2018-10-26 20:49:05,488 INFO L225 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-10-26 20:49:05,489 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_9e8076ce-b8cf-436b-8298-c40c92fd0814/bin-2019/utaipan/cvc4nyu Starting monitored process 29 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk [2018-10-26 20:49:05,504 INFO L101 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2018-10-26 20:49:05,594 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-26 20:49:05,594 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 20:49:05,624 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 20:49:07,290 INFO L134 CoverageAnalysis]: Checked inductivity of 2214 backedges. 0 proven. 1107 refuted. 0 times theorem prover too weak. 1107 trivial. 0 not checked. [2018-10-26 20:49:07,291 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-26 20:49:31,930 INFO L134 CoverageAnalysis]: Checked inductivity of 2214 backedges. 0 proven. 1836 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2018-10-26 20:49:31,932 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 20:49:31,932 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FPBP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_9e8076ce-b8cf-436b-8298-c40c92fd0814/bin-2019/utaipan/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 20:49:31,938 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-26 20:49:31,979 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-26 20:49:31,979 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 20:49:31,986 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 20:49:32,059 INFO L134 CoverageAnalysis]: Checked inductivity of 2214 backedges. 0 proven. 1107 refuted. 0 times theorem prover too weak. 1107 trivial. 0 not checked. [2018-10-26 20:49:32,059 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-26 20:49:42,342 WARN L179 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2018-10-26 20:49:45,577 INFO L134 CoverageAnalysis]: Checked inductivity of 2214 backedges. 0 proven. 1836 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2018-10-26 20:49:45,594 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2018-10-26 20:49:45,595 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 87, 61, 87] total 146 [2018-10-26 20:49:45,595 INFO L460 AbstractCegarLoop]: Interpolant automaton has 146 states [2018-10-26 20:49:45,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 146 interpolants. [2018-10-26 20:49:45,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=537, Invalid=20633, Unknown=0, NotChecked=0, Total=21170 [2018-10-26 20:49:45,597 INFO L87 Difference]: Start difference. First operand 97 states and 98 transitions. Second operand 146 states. [2018-10-26 20:49:53,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 20:49:53,217 INFO L93 Difference]: Finished difference Result 109 states and 111 transitions. [2018-10-26 20:49:53,221 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-10-26 20:49:53,221 INFO L78 Accepts]: Start accepts. Automaton has 146 states. Word has length 176 [2018-10-26 20:49:53,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 20:49:53,222 INFO L225 Difference]: With dead ends: 109 [2018-10-26 20:49:53,222 INFO L226 Difference]: Without dead ends: 103 [2018-10-26 20:49:53,224 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 761 GetRequests, 511 SyntacticMatches, 47 SemanticMatches, 203 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6609 ImplicationChecksByTransitivity, 19.8s TimeCoverageRelationStatistics Valid=2534, Invalid=39286, Unknown=0, NotChecked=0, Total=41820 [2018-10-26 20:49:53,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2018-10-26 20:49:53,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2018-10-26 20:49:53,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2018-10-26 20:49:53,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 104 transitions. [2018-10-26 20:49:53,231 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 104 transitions. Word has length 176 [2018-10-26 20:49:53,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 20:49:53,231 INFO L481 AbstractCegarLoop]: Abstraction has 103 states and 104 transitions. [2018-10-26 20:49:53,231 INFO L482 AbstractCegarLoop]: Interpolant automaton has 146 states. [2018-10-26 20:49:53,231 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 104 transitions. [2018-10-26 20:49:53,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2018-10-26 20:49:53,232 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 20:49:53,233 INFO L375 BasicCegarLoop]: trace histogram [30, 30, 29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 20:49:53,233 INFO L424 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 20:49:53,233 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 20:49:53,233 INFO L82 PathProgramCache]: Analyzing trace with hash 1282461769, now seen corresponding path program 15 times [2018-10-26 20:49:53,233 INFO L225 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-10-26 20:49:53,233 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_9e8076ce-b8cf-436b-8298-c40c92fd0814/bin-2019/utaipan/cvc4nyu Starting monitored process 31 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk [2018-10-26 20:49:53,250 INFO L101 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2018-10-26 20:49:54,877 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 30 check-sat command(s) [2018-10-26 20:49:54,877 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 20:49:54,922 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 20:49:56,854 INFO L134 CoverageAnalysis]: Checked inductivity of 2552 backedges. 0 proven. 1276 refuted. 0 times theorem prover too weak. 1276 trivial. 0 not checked. [2018-10-26 20:49:56,855 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-26 20:50:24,480 INFO L134 CoverageAnalysis]: Checked inductivity of 2552 backedges. 0 proven. 2117 refuted. 0 times theorem prover too weak. 435 trivial. 0 not checked. [2018-10-26 20:50:24,482 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 20:50:24,482 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FPBP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_9e8076ce-b8cf-436b-8298-c40c92fd0814/bin-2019/utaipan/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 20:50:24,491 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-26 20:50:24,705 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 30 check-sat command(s) [2018-10-26 20:50:24,705 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 20:50:24,712 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 20:50:24,945 INFO L134 CoverageAnalysis]: Checked inductivity of 2552 backedges. 0 proven. 1330 refuted. 0 times theorem prover too weak. 1222 trivial. 0 not checked. [2018-10-26 20:50:24,945 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-26 20:50:41,490 INFO L134 CoverageAnalysis]: Checked inductivity of 2552 backedges. 0 proven. 2117 refuted. 0 times theorem prover too weak. 435 trivial. 0 not checked. [2018-10-26 20:50:41,510 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2018-10-26 20:50:41,510 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 93, 66, 93] total 157 [2018-10-26 20:50:41,511 INFO L460 AbstractCegarLoop]: Interpolant automaton has 157 states [2018-10-26 20:50:41,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 157 interpolants. [2018-10-26 20:50:41,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=608, Invalid=23884, Unknown=0, NotChecked=0, Total=24492 [2018-10-26 20:50:41,512 INFO L87 Difference]: Start difference. First operand 103 states and 104 transitions. Second operand 157 states. [2018-10-26 20:50:51,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 20:50:51,058 INFO L93 Difference]: Finished difference Result 115 states and 117 transitions. [2018-10-26 20:50:51,059 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-10-26 20:50:51,060 INFO L78 Accepts]: Start accepts. Automaton has 157 states. Word has length 188 [2018-10-26 20:50:51,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 20:50:51,061 INFO L225 Difference]: With dead ends: 115 [2018-10-26 20:50:51,061 INFO L226 Difference]: Without dead ends: 109 [2018-10-26 20:50:51,062 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 813 GetRequests, 536 SyntacticMatches, 59 SemanticMatches, 218 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8544 ImplicationChecksByTransitivity, 23.7s TimeCoverageRelationStatistics Valid=2926, Invalid=45254, Unknown=0, NotChecked=0, Total=48180 [2018-10-26 20:50:51,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2018-10-26 20:50:51,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2018-10-26 20:50:51,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2018-10-26 20:50:51,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 110 transitions. [2018-10-26 20:50:51,068 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 110 transitions. Word has length 188 [2018-10-26 20:50:51,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 20:50:51,068 INFO L481 AbstractCegarLoop]: Abstraction has 109 states and 110 transitions. [2018-10-26 20:50:51,068 INFO L482 AbstractCegarLoop]: Interpolant automaton has 157 states. [2018-10-26 20:50:51,068 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 110 transitions. [2018-10-26 20:50:51,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2018-10-26 20:50:51,072 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 20:50:51,072 INFO L375 BasicCegarLoop]: trace histogram [32, 32, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 20:50:51,072 INFO L424 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 20:50:51,072 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 20:50:51,072 INFO L82 PathProgramCache]: Analyzing trace with hash -1053424823, now seen corresponding path program 16 times [2018-10-26 20:50:51,073 INFO L225 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-10-26 20:50:51,073 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_9e8076ce-b8cf-436b-8298-c40c92fd0814/bin-2019/utaipan/cvc4nyu Starting monitored process 33 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk [2018-10-26 20:50:51,106 INFO L101 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-26 20:50:51,335 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-26 20:50:51,335 INFO L250 tOrderPrioritization]: Conjunction of SSA is sat [2018-10-26 20:50:51,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-10-26 20:50:51,619 INFO L442 BasicCegarLoop]: Counterexample might be feasible [2018-10-26 20:50:51,659 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.10 08:50:51 BoogieIcfgContainer [2018-10-26 20:50:51,666 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-26 20:50:51,666 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-10-26 20:50:51,666 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-10-26 20:50:51,666 INFO L276 PluginConnector]: Witness Printer initialized [2018-10-26 20:50:51,667 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 08:45:22" (3/4) ... [2018-10-26 20:50:51,669 INFO L138 WitnessPrinter]: Generating witness for reachability counterexample [2018-10-26 20:50:51,746 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_9e8076ce-b8cf-436b-8298-c40c92fd0814/bin-2019/utaipan/witness.graphml [2018-10-26 20:50:51,746 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-10-26 20:50:51,747 INFO L168 Benchmark]: Toolchain (without parser) took 330310.47 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 140.0 MB). Free memory was 954.6 MB in the beginning and 889.7 MB in the end (delta: 64.8 MB). Peak memory consumption was 204.8 MB. Max. memory is 11.5 GB. [2018-10-26 20:50:51,748 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 1.0 GB. Free memory is still 978.7 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-10-26 20:50:51,748 INFO L168 Benchmark]: CACSL2BoogieTranslator took 230.25 ms. Allocated memory is still 1.0 GB. Free memory was 954.6 MB in the beginning and 943.8 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-10-26 20:50:51,748 INFO L168 Benchmark]: Boogie Procedure Inliner took 19.76 ms. Allocated memory is still 1.0 GB. Free memory is still 943.8 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-10-26 20:50:51,749 INFO L168 Benchmark]: Boogie Preprocessor took 17.87 ms. Allocated memory is still 1.0 GB. Free memory was 943.8 MB in the beginning and 938.5 MB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. [2018-10-26 20:50:51,749 INFO L168 Benchmark]: RCFGBuilder took 410.55 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 121.6 MB). Free memory was 938.5 MB in the beginning and 1.1 GB in the end (delta: -166.9 MB). Peak memory consumption was 21.5 MB. Max. memory is 11.5 GB. [2018-10-26 20:50:51,749 INFO L168 Benchmark]: TraceAbstraction took 329547.34 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 18.4 MB). Free memory was 1.1 GB in the beginning and 897.0 MB in the end (delta: 208.4 MB). Peak memory consumption was 226.7 MB. Max. memory is 11.5 GB. [2018-10-26 20:50:51,752 INFO L168 Benchmark]: Witness Printer took 80.51 ms. Allocated memory is still 1.2 GB. Free memory was 897.0 MB in the beginning and 889.7 MB in the end (delta: 7.2 MB). Peak memory consumption was 7.2 MB. Max. memory is 11.5 GB. [2018-10-26 20:50:51,755 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 1.0 GB. Free memory is still 978.7 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 230.25 ms. Allocated memory is still 1.0 GB. Free memory was 954.6 MB in the beginning and 943.8 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 19.76 ms. Allocated memory is still 1.0 GB. Free memory is still 943.8 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 17.87 ms. Allocated memory is still 1.0 GB. Free memory was 943.8 MB in the beginning and 938.5 MB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. * RCFGBuilder took 410.55 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 121.6 MB). Free memory was 938.5 MB in the beginning and 1.1 GB in the end (delta: -166.9 MB). Peak memory consumption was 21.5 MB. Max. memory is 11.5 GB. * TraceAbstraction took 329547.34 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 18.4 MB). Free memory was 1.1 GB in the beginning and 897.0 MB in the end (delta: 208.4 MB). Peak memory consumption was 226.7 MB. Max. memory is 11.5 GB. * Witness Printer took 80.51 ms. Allocated memory is still 1.2 GB. Free memory was 897.0 MB in the beginning and 889.7 MB in the end (delta: 7.2 MB). Peak memory consumption was 7.2 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 34]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L25] int n = __VERIFIER_nondet_int(); [L26] COND FALSE !(n < 1) VAL [n=32] [L29] CALL, EXPR hanoi(n) VAL [\old(n)=32] [L17] COND FALSE !(n == 1) VAL [\old(n)=32, n=32] [L20] CALL, EXPR hanoi(n-1) VAL [\old(n)=31] [L17] COND FALSE !(n == 1) VAL [\old(n)=31, n=31] [L20] CALL, EXPR hanoi(n-1) VAL [\old(n)=30] [L17] COND FALSE !(n == 1) VAL [\old(n)=30, n=30] [L20] CALL, EXPR hanoi(n-1) VAL [\old(n)=29] [L17] COND FALSE !(n == 1) VAL [\old(n)=29, n=29] [L20] CALL, EXPR hanoi(n-1) VAL [\old(n)=28] [L17] COND FALSE !(n == 1) VAL [\old(n)=28, n=28] [L20] CALL, EXPR hanoi(n-1) VAL [\old(n)=27] [L17] COND FALSE !(n == 1) VAL [\old(n)=27, n=27] [L20] CALL, EXPR hanoi(n-1) VAL [\old(n)=26] [L17] COND FALSE !(n == 1) VAL [\old(n)=26, n=26] [L20] CALL, EXPR hanoi(n-1) VAL [\old(n)=25] [L17] COND FALSE !(n == 1) VAL [\old(n)=25, n=25] [L20] CALL, EXPR hanoi(n-1) VAL [\old(n)=24] [L17] COND FALSE !(n == 1) VAL [\old(n)=24, n=24] [L20] CALL, EXPR hanoi(n-1) VAL [\old(n)=23] [L17] COND FALSE !(n == 1) VAL [\old(n)=23, n=23] [L20] CALL, EXPR hanoi(n-1) VAL [\old(n)=22] [L17] COND FALSE !(n == 1) VAL [\old(n)=22, n=22] [L20] CALL, EXPR hanoi(n-1) VAL [\old(n)=21] [L17] COND FALSE !(n == 1) VAL [\old(n)=21, n=21] [L20] CALL, EXPR hanoi(n-1) VAL [\old(n)=20] [L17] COND FALSE !(n == 1) VAL [\old(n)=20, n=20] [L20] CALL, EXPR hanoi(n-1) VAL [\old(n)=19] [L17] COND FALSE !(n == 1) VAL [\old(n)=19, n=19] [L20] CALL, EXPR hanoi(n-1) VAL [\old(n)=18] [L17] COND FALSE !(n == 1) VAL [\old(n)=18, n=18] [L20] CALL, EXPR hanoi(n-1) VAL [\old(n)=17] [L17] COND FALSE !(n == 1) VAL [\old(n)=17, n=17] [L20] CALL, EXPR hanoi(n-1) VAL [\old(n)=16] [L17] COND FALSE !(n == 1) VAL [\old(n)=16, n=16] [L20] CALL, EXPR hanoi(n-1) VAL [\old(n)=15] [L17] COND FALSE !(n == 1) VAL [\old(n)=15, n=15] [L20] CALL, EXPR hanoi(n-1) VAL [\old(n)=14] [L17] COND FALSE !(n == 1) VAL [\old(n)=14, n=14] [L20] CALL, EXPR hanoi(n-1) VAL [\old(n)=13] [L17] COND FALSE !(n == 1) VAL [\old(n)=13, n=13] [L20] CALL, EXPR hanoi(n-1) VAL [\old(n)=12] [L17] COND FALSE !(n == 1) VAL [\old(n)=12, n=12] [L20] CALL, EXPR hanoi(n-1) VAL [\old(n)=11] [L17] COND FALSE !(n == 1) VAL [\old(n)=11, n=11] [L20] CALL, EXPR hanoi(n-1) VAL [\old(n)=10] [L17] COND FALSE !(n == 1) VAL [\old(n)=10, n=10] [L20] CALL, EXPR hanoi(n-1) VAL [\old(n)=9] [L17] COND FALSE !(n == 1) VAL [\old(n)=9, n=9] [L20] CALL, EXPR hanoi(n-1) VAL [\old(n)=8] [L17] COND FALSE !(n == 1) VAL [\old(n)=8, n=8] [L20] CALL, EXPR hanoi(n-1) VAL [\old(n)=7] [L17] COND FALSE !(n == 1) VAL [\old(n)=7, n=7] [L20] CALL, EXPR hanoi(n-1) VAL [\old(n)=6] [L17] COND FALSE !(n == 1) VAL [\old(n)=6, n=6] [L20] CALL, EXPR hanoi(n-1) VAL [\old(n)=5] [L17] COND FALSE !(n == 1) VAL [\old(n)=5, n=5] [L20] CALL, EXPR hanoi(n-1) VAL [\old(n)=4] [L17] COND FALSE !(n == 1) VAL [\old(n)=4, n=4] [L20] CALL, EXPR hanoi(n-1) VAL [\old(n)=3] [L17] COND FALSE !(n == 1) VAL [\old(n)=3, n=3] [L20] CALL, EXPR hanoi(n-1) VAL [\old(n)=2] [L17] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L20] CALL, EXPR hanoi(n-1) VAL [\old(n)=1] [L17] COND TRUE n == 1 [L18] RET return 1; VAL [\old(n)=1, \result=1, n=1] [L20] EXPR hanoi(n-1) VAL [\old(n)=2, hanoi(n-1)=1, n=2] [L20] RET return 2 * (hanoi(n-1)) + 1; [L20] EXPR hanoi(n-1) VAL [\old(n)=3, hanoi(n-1)=3, n=3] [L20] RET return 2 * (hanoi(n-1)) + 1; [L20] EXPR hanoi(n-1) VAL [\old(n)=4, hanoi(n-1)=7, n=4] [L20] RET return 2 * (hanoi(n-1)) + 1; [L20] EXPR hanoi(n-1) VAL [\old(n)=5, hanoi(n-1)=15, n=5] [L20] RET return 2 * (hanoi(n-1)) + 1; [L20] EXPR hanoi(n-1) VAL [\old(n)=6, hanoi(n-1)=31, n=6] [L20] RET return 2 * (hanoi(n-1)) + 1; [L20] EXPR hanoi(n-1) VAL [\old(n)=7, hanoi(n-1)=63, n=7] [L20] RET return 2 * (hanoi(n-1)) + 1; [L20] EXPR hanoi(n-1) VAL [\old(n)=8, hanoi(n-1)=127, n=8] [L20] RET return 2 * (hanoi(n-1)) + 1; [L20] EXPR hanoi(n-1) VAL [\old(n)=9, hanoi(n-1)=255, n=9] [L20] RET return 2 * (hanoi(n-1)) + 1; [L20] EXPR hanoi(n-1) VAL [\old(n)=10, hanoi(n-1)=511, n=10] [L20] RET return 2 * (hanoi(n-1)) + 1; [L20] EXPR hanoi(n-1) VAL [\old(n)=11, hanoi(n-1)=1023, n=11] [L20] RET return 2 * (hanoi(n-1)) + 1; [L20] EXPR hanoi(n-1) VAL [\old(n)=12, hanoi(n-1)=2047, n=12] [L20] RET return 2 * (hanoi(n-1)) + 1; [L20] EXPR hanoi(n-1) VAL [\old(n)=13, hanoi(n-1)=4095, n=13] [L20] RET return 2 * (hanoi(n-1)) + 1; [L20] EXPR hanoi(n-1) VAL [\old(n)=14, hanoi(n-1)=8191, n=14] [L20] RET return 2 * (hanoi(n-1)) + 1; [L20] EXPR hanoi(n-1) VAL [\old(n)=15, hanoi(n-1)=16383, n=15] [L20] RET return 2 * (hanoi(n-1)) + 1; [L20] EXPR hanoi(n-1) VAL [\old(n)=16, hanoi(n-1)=32767, n=16] [L20] RET return 2 * (hanoi(n-1)) + 1; [L20] EXPR hanoi(n-1) VAL [\old(n)=17, hanoi(n-1)=65535, n=17] [L20] RET return 2 * (hanoi(n-1)) + 1; [L20] EXPR hanoi(n-1) VAL [\old(n)=18, hanoi(n-1)=131071, n=18] [L20] RET return 2 * (hanoi(n-1)) + 1; [L20] EXPR hanoi(n-1) VAL [\old(n)=19, hanoi(n-1)=262143, n=19] [L20] RET return 2 * (hanoi(n-1)) + 1; [L20] EXPR hanoi(n-1) VAL [\old(n)=20, hanoi(n-1)=524287, n=20] [L20] RET return 2 * (hanoi(n-1)) + 1; [L20] EXPR hanoi(n-1) VAL [\old(n)=21, hanoi(n-1)=1048575, n=21] [L20] RET return 2 * (hanoi(n-1)) + 1; [L20] EXPR hanoi(n-1) VAL [\old(n)=22, hanoi(n-1)=2097151, n=22] [L20] RET return 2 * (hanoi(n-1)) + 1; [L20] EXPR hanoi(n-1) VAL [\old(n)=23, hanoi(n-1)=4194303, n=23] [L20] RET return 2 * (hanoi(n-1)) + 1; [L20] EXPR hanoi(n-1) VAL [\old(n)=24, hanoi(n-1)=8388607, n=24] [L20] RET return 2 * (hanoi(n-1)) + 1; [L20] EXPR hanoi(n-1) VAL [\old(n)=25, hanoi(n-1)=16777215, n=25] [L20] RET return 2 * (hanoi(n-1)) + 1; [L20] EXPR hanoi(n-1) VAL [\old(n)=26, hanoi(n-1)=33554431, n=26] [L20] RET return 2 * (hanoi(n-1)) + 1; [L20] EXPR hanoi(n-1) VAL [\old(n)=27, hanoi(n-1)=67108863, n=27] [L20] RET return 2 * (hanoi(n-1)) + 1; [L20] EXPR hanoi(n-1) VAL [\old(n)=28, hanoi(n-1)=134217727, n=28] [L20] RET return 2 * (hanoi(n-1)) + 1; [L20] EXPR hanoi(n-1) VAL [\old(n)=29, hanoi(n-1)=268435455, n=29] [L20] RET return 2 * (hanoi(n-1)) + 1; [L20] EXPR hanoi(n-1) VAL [\old(n)=30, hanoi(n-1)=536870911, n=30] [L20] RET return 2 * (hanoi(n-1)) + 1; [L20] EXPR hanoi(n-1) VAL [\old(n)=31, hanoi(n-1)=1073741823, n=31] [L20] RET return 2 * (hanoi(n-1)) + 1; [L20] EXPR hanoi(n-1) VAL [\old(n)=32, hanoi(n-1)=2147483647, n=32] [L20] RET return 2 * (hanoi(n-1)) + 1; [L29] EXPR hanoi(n) VAL [hanoi(n)=-1, n=32] [L29] unsigned result = hanoi(n); [L31] COND FALSE !(result+1>0 && result+1 == 1<