./Ultimate.py --spec ../../sv-benchmarks/c/ReachSafety.prp --file ../../sv-benchmarks/c/ldv-regression/test27_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_e05858fa-f936-42c2-9240-49d36c30c106/bin-2019/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_e05858fa-f936-42c2-9240-49d36c30c106/bin-2019/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_e05858fa-f936-42c2-9240-49d36c30c106/bin-2019/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_e05858fa-f936-42c2-9240-49d36c30c106/bin-2019/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/ldv-regression/test27_false-unreach-call_true-termination.c -s /tmp/vcloud-vcloud-master/worker/working_dir_e05858fa-f936-42c2-9240-49d36c30c106/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_e05858fa-f936-42c2-9240-49d36c30c106/bin-2019/uautomizer --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 8d15e59fd1b84d7219285b33cc166f567d0bcf3e ....................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 [2018-11-10 12:07:49,646 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-10 12:07:49,648 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-10 12:07:49,656 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-10 12:07:49,656 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-10 12:07:49,657 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-10 12:07:49,657 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-10 12:07:49,659 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-10 12:07:49,660 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-10 12:07:49,661 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-10 12:07:49,661 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-10 12:07:49,662 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-10 12:07:49,662 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-10 12:07:49,663 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-10 12:07:49,664 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-10 12:07:49,664 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-10 12:07:49,665 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-10 12:07:49,666 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-10 12:07:49,668 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-10 12:07:49,669 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-10 12:07:49,670 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-10 12:07:49,671 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-10 12:07:49,673 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-10 12:07:49,673 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-10 12:07:49,673 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-10 12:07:49,674 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-10 12:07:49,675 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-10 12:07:49,675 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-10 12:07:49,676 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-10 12:07:49,677 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-10 12:07:49,677 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-10 12:07:49,678 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-10 12:07:49,678 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-10 12:07:49,678 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-10 12:07:49,679 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-10 12:07:49,679 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-10 12:07:49,680 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_e05858fa-f936-42c2-9240-49d36c30c106/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2018-11-10 12:07:49,691 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-10 12:07:49,691 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-10 12:07:49,691 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-10 12:07:49,692 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-11-10 12:07:49,692 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-11-10 12:07:49,692 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-11-10 12:07:49,692 INFO L133 SettingsManager]: * Use SBE=true [2018-11-10 12:07:49,693 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-10 12:07:49,693 INFO L133 SettingsManager]: * sizeof long=4 [2018-11-10 12:07:49,693 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-10 12:07:49,693 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-11-10 12:07:49,693 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-10 12:07:49,693 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-10 12:07:49,694 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-10 12:07:49,694 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-10 12:07:49,694 INFO L133 SettingsManager]: * sizeof long double=12 [2018-11-10 12:07:49,694 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-10 12:07:49,694 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-10 12:07:49,694 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-10 12:07:49,695 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-10 12:07:49,695 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-10 12:07:49,695 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-10 12:07:49,695 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-10 12:07:49,695 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-10 12:07:49,695 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-10 12:07:49,695 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-10 12:07:49,696 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-11-10 12:07:49,696 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-10 12:07:49,696 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-10 12:07:49,696 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true 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_e05858fa-f936-42c2-9240-49d36c30c106/bin-2019/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8d15e59fd1b84d7219285b33cc166f567d0bcf3e [2018-11-10 12:07:49,720 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-10 12:07:49,729 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-10 12:07:49,731 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-10 12:07:49,732 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-10 12:07:49,732 INFO L276 PluginConnector]: CDTParser initialized [2018-11-10 12:07:49,733 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_e05858fa-f936-42c2-9240-49d36c30c106/bin-2019/uautomizer/../../sv-benchmarks/c/ldv-regression/test27_false-unreach-call_true-termination.c [2018-11-10 12:07:49,774 INFO L218 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_e05858fa-f936-42c2-9240-49d36c30c106/bin-2019/uautomizer/data/e083a97bf/f31dc2f1b67a4086a3fc4179deb6a59b/FLAG416d6c2e7 [2018-11-10 12:07:50,112 INFO L298 CDTParser]: Found 1 translation units. [2018-11-10 12:07:50,112 INFO L158 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_e05858fa-f936-42c2-9240-49d36c30c106/sv-benchmarks/c/ldv-regression/test27_false-unreach-call_true-termination.c [2018-11-10 12:07:50,116 INFO L346 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_e05858fa-f936-42c2-9240-49d36c30c106/bin-2019/uautomizer/data/e083a97bf/f31dc2f1b67a4086a3fc4179deb6a59b/FLAG416d6c2e7 [2018-11-10 12:07:50,125 INFO L354 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_e05858fa-f936-42c2-9240-49d36c30c106/bin-2019/uautomizer/data/e083a97bf/f31dc2f1b67a4086a3fc4179deb6a59b [2018-11-10 12:07:50,128 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-10 12:07:50,129 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-11-10 12:07:50,129 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-10 12:07:50,129 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-10 12:07:50,132 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-10 12:07:50,132 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.11 12:07:50" (1/1) ... [2018-11-10 12:07:50,134 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1fbc8502 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 12:07:50, skipping insertion in model container [2018-11-10 12:07:50,134 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.11 12:07:50" (1/1) ... [2018-11-10 12:07:50,141 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-10 12:07:50,154 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-11-10 12:07:50,261 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-10 12:07:50,267 INFO L189 MainTranslator]: Completed pre-run [2018-11-10 12:07:50,284 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-10 12:07:50,296 INFO L193 MainTranslator]: Completed translation [2018-11-10 12:07:50,297 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 12:07:50 WrapperNode [2018-11-10 12:07:50,297 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-10 12:07:50,297 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-10 12:07:50,297 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-10 12:07:50,298 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-10 12:07:50,307 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 12:07:50" (1/1) ... [2018-11-10 12:07:50,307 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 12:07:50" (1/1) ... [2018-11-10 12:07:50,316 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 12:07:50" (1/1) ... [2018-11-10 12:07:50,316 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 12:07:50" (1/1) ... [2018-11-10 12:07:50,324 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 12:07:50" (1/1) ... [2018-11-10 12:07:50,328 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 12:07:50" (1/1) ... [2018-11-10 12:07:50,330 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 12:07:50" (1/1) ... [2018-11-10 12:07:50,332 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-10 12:07:50,333 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-10 12:07:50,333 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-10 12:07:50,333 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-10 12:07:50,334 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 12:07:50" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_e05858fa-f936-42c2-9240-49d36c30c106/bin-2019/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-10 12:07:50,424 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-10 12:07:50,424 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-10 12:07:50,425 INFO L138 BoogieDeclarations]: Found implementation of procedure check [2018-11-10 12:07:50,425 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-10 12:07:50,425 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2018-11-10 12:07:50,425 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2018-11-10 12:07:50,425 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_pointer [2018-11-10 12:07:50,425 INFO L130 BoogieDeclarations]: Found specification of procedure check [2018-11-10 12:07:50,425 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2018-11-10 12:07:50,425 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2018-11-10 12:07:50,426 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-10 12:07:50,426 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-11-10 12:07:50,426 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2018-11-10 12:07:50,426 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2018-11-10 12:07:50,426 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-11-10 12:07:50,426 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-10 12:07:50,426 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-10 12:07:50,427 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2018-11-10 12:07:50,673 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-10 12:07:50,673 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.11 12:07:50 BoogieIcfgContainer [2018-11-10 12:07:50,673 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-10 12:07:50,674 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-10 12:07:50,674 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-10 12:07:50,677 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-10 12:07:50,677 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.11 12:07:50" (1/3) ... [2018-11-10 12:07:50,678 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7faa0f49 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.11 12:07:50, skipping insertion in model container [2018-11-10 12:07:50,678 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 12:07:50" (2/3) ... [2018-11-10 12:07:50,679 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7faa0f49 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.11 12:07:50, skipping insertion in model container [2018-11-10 12:07:50,679 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.11 12:07:50" (3/3) ... [2018-11-10 12:07:50,683 INFO L112 eAbstractionObserver]: Analyzing ICFG test27_false-unreach-call_true-termination.c [2018-11-10 12:07:50,692 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-10 12:07:50,700 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-10 12:07:50,717 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-10 12:07:50,749 INFO L135 ementStrategyFactory]: Using default assertion order modulation [2018-11-10 12:07:50,749 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-10 12:07:50,749 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-10 12:07:50,750 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-10 12:07:50,750 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-10 12:07:50,750 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-10 12:07:50,750 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-10 12:07:50,750 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-10 12:07:50,750 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-10 12:07:50,769 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states. [2018-11-10 12:07:50,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2018-11-10 12:07:50,776 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 12:07:50,777 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 12:07:50,779 INFO L424 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 12:07:50,784 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 12:07:50,784 INFO L82 PathProgramCache]: Analyzing trace with hash -459933461, now seen corresponding path program 1 times [2018-11-10 12:07:50,786 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 12:07:50,786 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 12:07:50,836 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 12:07:50,836 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 12:07:50,836 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 12:07:50,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 12:07:50,936 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 12:07:50,938 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-10 12:07:50,938 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-11-10 12:07:50,943 INFO L460 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-11-10 12:07:50,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-11-10 12:07:50,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-11-10 12:07:50,956 INFO L87 Difference]: Start difference. First operand 69 states. Second operand 2 states. [2018-11-10 12:07:50,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 12:07:50,977 INFO L93 Difference]: Finished difference Result 113 states and 123 transitions. [2018-11-10 12:07:50,977 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-11-10 12:07:50,978 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 39 [2018-11-10 12:07:50,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 12:07:50,985 INFO L225 Difference]: With dead ends: 113 [2018-11-10 12:07:50,985 INFO L226 Difference]: Without dead ends: 48 [2018-11-10 12:07:50,988 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-11-10 12:07:51,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2018-11-10 12:07:51,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2018-11-10 12:07:51,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-11-10 12:07:51,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2018-11-10 12:07:51,017 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 39 [2018-11-10 12:07:51,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 12:07:51,017 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2018-11-10 12:07:51,017 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-11-10 12:07:51,017 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2018-11-10 12:07:51,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-11-10 12:07:51,018 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 12:07:51,019 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 12:07:51,019 INFO L424 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 12:07:51,019 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 12:07:51,019 INFO L82 PathProgramCache]: Analyzing trace with hash -725256217, now seen corresponding path program 1 times [2018-11-10 12:07:51,019 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 12:07:51,020 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 12:07:51,021 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 12:07:51,021 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 12:07:51,021 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 12:07:51,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 12:07:51,093 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 12:07:51,093 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-10 12:07:51,094 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-11-10 12:07:51,095 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-10 12:07:51,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-10 12:07:51,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-10 12:07:51,096 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand 3 states. [2018-11-10 12:07:51,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 12:07:51,129 INFO L93 Difference]: Finished difference Result 86 states and 88 transitions. [2018-11-10 12:07:51,129 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-10 12:07:51,129 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 42 [2018-11-10 12:07:51,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 12:07:51,131 INFO L225 Difference]: With dead ends: 86 [2018-11-10 12:07:51,131 INFO L226 Difference]: Without dead ends: 55 [2018-11-10 12:07:51,132 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-10 12:07:51,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-11-10 12:07:51,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 50. [2018-11-10 12:07:51,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2018-11-10 12:07:51,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 51 transitions. [2018-11-10 12:07:51,138 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 51 transitions. Word has length 42 [2018-11-10 12:07:51,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 12:07:51,138 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 51 transitions. [2018-11-10 12:07:51,138 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-10 12:07:51,139 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 51 transitions. [2018-11-10 12:07:51,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-11-10 12:07:51,139 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 12:07:51,140 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 12:07:51,140 INFO L424 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 12:07:51,140 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 12:07:51,140 INFO L82 PathProgramCache]: Analyzing trace with hash 1332043679, now seen corresponding path program 1 times [2018-11-10 12:07:51,140 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 12:07:51,140 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 12:07:51,141 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 12:07:51,141 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 12:07:51,141 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 12:07:51,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 12:07:51,216 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 12:07:51,216 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 12:07:51,216 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_e05858fa-f936-42c2-9240-49d36c30c106/bin-2019/uautomizer/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 12:07:51,225 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 12:07:51,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 12:07:51,269 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 12:07:51,296 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 12:07:51,318 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 12:07:51,318 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2018-11-10 12:07:51,319 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-10 12:07:51,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-10 12:07:51,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-11-10 12:07:51,320 INFO L87 Difference]: Start difference. First operand 50 states and 51 transitions. Second operand 5 states. [2018-11-10 12:07:51,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 12:07:51,352 INFO L93 Difference]: Finished difference Result 93 states and 95 transitions. [2018-11-10 12:07:51,353 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-10 12:07:51,353 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 49 [2018-11-10 12:07:51,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 12:07:51,354 INFO L225 Difference]: With dead ends: 93 [2018-11-10 12:07:51,354 INFO L226 Difference]: Without dead ends: 62 [2018-11-10 12:07:51,354 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-11-10 12:07:51,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2018-11-10 12:07:51,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 57. [2018-11-10 12:07:51,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-11-10 12:07:51,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2018-11-10 12:07:51,360 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 49 [2018-11-10 12:07:51,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 12:07:51,361 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2018-11-10 12:07:51,361 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-10 12:07:51,361 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2018-11-10 12:07:51,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-11-10 12:07:51,362 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 12:07:51,362 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 12:07:51,362 INFO L424 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 12:07:51,363 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 12:07:51,363 INFO L82 PathProgramCache]: Analyzing trace with hash 1295767783, now seen corresponding path program 2 times [2018-11-10 12:07:51,363 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 12:07:51,363 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 12:07:51,364 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 12:07:51,364 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 12:07:51,364 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 12:07:51,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 12:07:51,471 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 12:07:51,471 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 12:07:51,472 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_e05858fa-f936-42c2-9240-49d36c30c106/bin-2019/uautomizer/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 12:07:51,484 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-10 12:07:51,526 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-10 12:07:51,527 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 12:07:51,530 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 12:07:51,543 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 12:07:51,572 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 12:07:51,572 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2018-11-10 12:07:51,572 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-10 12:07:51,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-10 12:07:51,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-11-10 12:07:51,573 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand 6 states. [2018-11-10 12:07:51,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 12:07:51,605 INFO L93 Difference]: Finished difference Result 100 states and 102 transitions. [2018-11-10 12:07:51,608 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-10 12:07:51,609 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 56 [2018-11-10 12:07:51,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 12:07:51,609 INFO L225 Difference]: With dead ends: 100 [2018-11-10 12:07:51,610 INFO L226 Difference]: Without dead ends: 69 [2018-11-10 12:07:51,610 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-11-10 12:07:51,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-11-10 12:07:51,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 64. [2018-11-10 12:07:51,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2018-11-10 12:07:51,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 65 transitions. [2018-11-10 12:07:51,614 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 65 transitions. Word has length 56 [2018-11-10 12:07:51,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 12:07:51,614 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 65 transitions. [2018-11-10 12:07:51,614 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-10 12:07:51,615 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 65 transitions. [2018-11-10 12:07:51,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2018-11-10 12:07:51,616 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 12:07:51,616 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 12:07:51,616 INFO L424 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 12:07:51,616 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 12:07:51,617 INFO L82 PathProgramCache]: Analyzing trace with hash -667951457, now seen corresponding path program 3 times [2018-11-10 12:07:51,617 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 12:07:51,617 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 12:07:51,618 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 12:07:51,618 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 12:07:51,618 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 12:07:51,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 12:07:51,708 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 12:07:51,709 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 12:07:51,709 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_e05858fa-f936-42c2-9240-49d36c30c106/bin-2019/uautomizer/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 [2018-11-10 12:07:51,715 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-10 12:07:51,814 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-11-10 12:07:51,815 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 12:07:51,818 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 12:07:51,839 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 12:07:51,859 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 12:07:51,859 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2018-11-10 12:07:51,859 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-11-10 12:07:51,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-10 12:07:51,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-11-10 12:07:51,860 INFO L87 Difference]: Start difference. First operand 64 states and 65 transitions. Second operand 7 states. [2018-11-10 12:07:51,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 12:07:51,898 INFO L93 Difference]: Finished difference Result 107 states and 109 transitions. [2018-11-10 12:07:51,901 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-10 12:07:51,901 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 63 [2018-11-10 12:07:51,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 12:07:51,902 INFO L225 Difference]: With dead ends: 107 [2018-11-10 12:07:51,902 INFO L226 Difference]: Without dead ends: 76 [2018-11-10 12:07:51,903 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-11-10 12:07:51,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2018-11-10 12:07:51,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 71. [2018-11-10 12:07:51,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2018-11-10 12:07:51,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 72 transitions. [2018-11-10 12:07:51,908 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 72 transitions. Word has length 63 [2018-11-10 12:07:51,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 12:07:51,908 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 72 transitions. [2018-11-10 12:07:51,908 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-11-10 12:07:51,908 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 72 transitions. [2018-11-10 12:07:51,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2018-11-10 12:07:51,909 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 12:07:51,910 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 12:07:51,910 INFO L424 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 12:07:51,910 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 12:07:51,910 INFO L82 PathProgramCache]: Analyzing trace with hash -495683097, now seen corresponding path program 4 times [2018-11-10 12:07:51,910 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 12:07:51,910 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 12:07:51,911 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 12:07:51,911 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 12:07:51,911 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 12:07:51,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 12:07:51,985 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 12:07:51,985 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 12:07:51,985 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_e05858fa-f936-42c2-9240-49d36c30c106/bin-2019/uautomizer/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 12:07:51,991 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-10 12:07:52,063 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-10 12:07:52,063 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 12:07:52,066 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 12:07:52,099 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 12:07:52,118 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 12:07:52,118 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2018-11-10 12:07:52,118 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-11-10 12:07:52,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-11-10 12:07:52,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-11-10 12:07:52,119 INFO L87 Difference]: Start difference. First operand 71 states and 72 transitions. Second operand 8 states. [2018-11-10 12:07:52,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 12:07:52,196 INFO L93 Difference]: Finished difference Result 114 states and 116 transitions. [2018-11-10 12:07:52,196 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-10 12:07:52,196 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 70 [2018-11-10 12:07:52,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 12:07:52,197 INFO L225 Difference]: With dead ends: 114 [2018-11-10 12:07:52,198 INFO L226 Difference]: Without dead ends: 83 [2018-11-10 12:07:52,198 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-11-10 12:07:52,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2018-11-10 12:07:52,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 78. [2018-11-10 12:07:52,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2018-11-10 12:07:52,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 79 transitions. [2018-11-10 12:07:52,206 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 79 transitions. Word has length 70 [2018-11-10 12:07:52,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 12:07:52,207 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 79 transitions. [2018-11-10 12:07:52,207 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-11-10 12:07:52,207 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 79 transitions. [2018-11-10 12:07:52,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2018-11-10 12:07:52,208 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 12:07:52,208 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 12:07:52,208 INFO L424 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 12:07:52,209 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 12:07:52,209 INFO L82 PathProgramCache]: Analyzing trace with hash 288365983, now seen corresponding path program 5 times [2018-11-10 12:07:52,209 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 12:07:52,210 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 12:07:52,210 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 12:07:52,211 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 12:07:52,211 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 12:07:52,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 12:07:52,321 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 80 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 12:07:52,321 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 12:07:52,322 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_e05858fa-f936-42c2-9240-49d36c30c106/bin-2019/uautomizer/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 [2018-11-10 12:07:52,331 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-10 12:07:52,540 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-11-10 12:07:52,540 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 12:07:52,544 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 12:07:52,568 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 80 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 12:07:52,585 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 12:07:52,585 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2018-11-10 12:07:52,585 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-11-10 12:07:52,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-11-10 12:07:52,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-11-10 12:07:52,586 INFO L87 Difference]: Start difference. First operand 78 states and 79 transitions. Second operand 9 states. [2018-11-10 12:07:52,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 12:07:52,614 INFO L93 Difference]: Finished difference Result 121 states and 123 transitions. [2018-11-10 12:07:52,614 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-11-10 12:07:52,614 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 77 [2018-11-10 12:07:52,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 12:07:52,615 INFO L225 Difference]: With dead ends: 121 [2018-11-10 12:07:52,615 INFO L226 Difference]: Without dead ends: 90 [2018-11-10 12:07:52,616 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-11-10 12:07:52,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2018-11-10 12:07:52,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 85. [2018-11-10 12:07:52,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2018-11-10 12:07:52,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 86 transitions. [2018-11-10 12:07:52,625 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 86 transitions. Word has length 77 [2018-11-10 12:07:52,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 12:07:52,626 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 86 transitions. [2018-11-10 12:07:52,626 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-11-10 12:07:52,626 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 86 transitions. [2018-11-10 12:07:52,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2018-11-10 12:07:52,627 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 12:07:52,627 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 12:07:52,627 INFO L424 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 12:07:52,627 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 12:07:52,627 INFO L82 PathProgramCache]: Analyzing trace with hash -209757465, now seen corresponding path program 6 times [2018-11-10 12:07:52,627 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 12:07:52,628 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 12:07:52,628 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 12:07:52,628 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 12:07:52,628 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 12:07:52,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 12:07:52,719 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 12:07:52,719 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 12:07:52,719 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_e05858fa-f936-42c2-9240-49d36c30c106/bin-2019/uautomizer/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 12:07:52,725 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-10 12:07:53,160 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-11-10 12:07:53,160 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 12:07:53,163 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 12:07:53,189 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 12:07:53,207 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 12:07:53,207 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2018-11-10 12:07:53,207 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-11-10 12:07:53,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-11-10 12:07:53,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-11-10 12:07:53,208 INFO L87 Difference]: Start difference. First operand 85 states and 86 transitions. Second operand 10 states. [2018-11-10 12:07:53,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 12:07:53,246 INFO L93 Difference]: Finished difference Result 128 states and 130 transitions. [2018-11-10 12:07:53,247 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-11-10 12:07:53,247 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 84 [2018-11-10 12:07:53,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 12:07:53,248 INFO L225 Difference]: With dead ends: 128 [2018-11-10 12:07:53,248 INFO L226 Difference]: Without dead ends: 97 [2018-11-10 12:07:53,248 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-11-10 12:07:53,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2018-11-10 12:07:53,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 92. [2018-11-10 12:07:53,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2018-11-10 12:07:53,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 93 transitions. [2018-11-10 12:07:53,265 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 93 transitions. Word has length 84 [2018-11-10 12:07:53,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 12:07:53,266 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 93 transitions. [2018-11-10 12:07:53,266 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-11-10 12:07:53,266 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 93 transitions. [2018-11-10 12:07:53,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2018-11-10 12:07:53,267 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 12:07:53,267 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 12:07:53,268 INFO L424 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 12:07:53,268 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 12:07:53,268 INFO L82 PathProgramCache]: Analyzing trace with hash -1990845281, now seen corresponding path program 7 times [2018-11-10 12:07:53,268 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 12:07:53,268 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 12:07:53,269 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 12:07:53,269 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 12:07:53,269 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 12:07:53,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 12:07:53,359 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 0 proven. 161 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 12:07:53,360 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 12:07:53,360 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_e05858fa-f936-42c2-9240-49d36c30c106/bin-2019/uautomizer/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 [2018-11-10 12:07:53,374 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 12:07:53,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 12:07:53,403 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 12:07:53,419 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 0 proven. 161 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 12:07:53,437 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 12:07:53,438 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2018-11-10 12:07:53,438 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-11-10 12:07:53,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-11-10 12:07:53,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-11-10 12:07:53,438 INFO L87 Difference]: Start difference. First operand 92 states and 93 transitions. Second operand 11 states. [2018-11-10 12:07:53,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 12:07:53,488 INFO L93 Difference]: Finished difference Result 135 states and 137 transitions. [2018-11-10 12:07:53,488 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-11-10 12:07:53,488 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 91 [2018-11-10 12:07:53,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 12:07:53,489 INFO L225 Difference]: With dead ends: 135 [2018-11-10 12:07:53,489 INFO L226 Difference]: Without dead ends: 104 [2018-11-10 12:07:53,490 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-11-10 12:07:53,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2018-11-10 12:07:53,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 99. [2018-11-10 12:07:53,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2018-11-10 12:07:53,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 100 transitions. [2018-11-10 12:07:53,496 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 100 transitions. Word has length 91 [2018-11-10 12:07:53,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 12:07:53,497 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 100 transitions. [2018-11-10 12:07:53,497 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-11-10 12:07:53,497 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 100 transitions. [2018-11-10 12:07:53,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2018-11-10 12:07:53,498 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 12:07:53,498 INFO L375 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 12:07:53,498 INFO L424 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 12:07:53,499 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 12:07:53,499 INFO L82 PathProgramCache]: Analyzing trace with hash 1131183079, now seen corresponding path program 8 times [2018-11-10 12:07:53,499 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 12:07:53,499 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 12:07:53,499 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 12:07:53,500 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 12:07:53,500 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 12:07:53,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 12:07:53,587 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 0 proven. 212 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 12:07:53,588 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 12:07:53,588 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_e05858fa-f936-42c2-9240-49d36c30c106/bin-2019/uautomizer/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 12:07:53,598 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-10 12:07:53,636 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-10 12:07:53,636 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 12:07:53,638 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 12:07:53,666 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 0 proven. 212 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 12:07:53,684 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 12:07:53,684 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2018-11-10 12:07:53,684 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-11-10 12:07:53,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-11-10 12:07:53,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-11-10 12:07:53,686 INFO L87 Difference]: Start difference. First operand 99 states and 100 transitions. Second operand 12 states. [2018-11-10 12:07:53,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 12:07:53,737 INFO L93 Difference]: Finished difference Result 142 states and 144 transitions. [2018-11-10 12:07:53,738 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-11-10 12:07:53,738 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 98 [2018-11-10 12:07:53,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 12:07:53,738 INFO L225 Difference]: With dead ends: 142 [2018-11-10 12:07:53,738 INFO L226 Difference]: Without dead ends: 111 [2018-11-10 12:07:53,739 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-11-10 12:07:53,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2018-11-10 12:07:53,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 106. [2018-11-10 12:07:53,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2018-11-10 12:07:53,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 107 transitions. [2018-11-10 12:07:53,743 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 107 transitions. Word has length 98 [2018-11-10 12:07:53,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 12:07:53,743 INFO L481 AbstractCegarLoop]: Abstraction has 106 states and 107 transitions. [2018-11-10 12:07:53,743 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-11-10 12:07:53,743 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 107 transitions. [2018-11-10 12:07:53,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2018-11-10 12:07:53,746 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 12:07:53,746 INFO L375 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 12:07:53,746 INFO L424 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 12:07:53,746 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 12:07:53,747 INFO L82 PathProgramCache]: Analyzing trace with hash -342762593, now seen corresponding path program 9 times [2018-11-10 12:07:53,747 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 12:07:53,747 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 12:07:53,747 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 12:07:53,747 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 12:07:53,748 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 12:07:53,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 12:07:53,851 INFO L134 CoverageAnalysis]: Checked inductivity of 270 backedges. 0 proven. 270 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 12:07:53,851 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 12:07:53,851 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_e05858fa-f936-42c2-9240-49d36c30c106/bin-2019/uautomizer/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 [2018-11-10 12:07:53,864 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-10 12:07:55,642 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-11-10 12:07:55,643 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 12:07:55,647 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 12:07:55,670 INFO L134 CoverageAnalysis]: Checked inductivity of 270 backedges. 0 proven. 270 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 12:07:55,688 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 12:07:55,689 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2018-11-10 12:07:55,689 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-11-10 12:07:55,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-11-10 12:07:55,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-11-10 12:07:55,689 INFO L87 Difference]: Start difference. First operand 106 states and 107 transitions. Second operand 13 states. [2018-11-10 12:07:55,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 12:07:55,739 INFO L93 Difference]: Finished difference Result 144 states and 146 transitions. [2018-11-10 12:07:55,745 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-11-10 12:07:55,745 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 105 [2018-11-10 12:07:55,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 12:07:55,746 INFO L225 Difference]: With dead ends: 144 [2018-11-10 12:07:55,746 INFO L226 Difference]: Without dead ends: 113 [2018-11-10 12:07:55,747 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-11-10 12:07:55,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2018-11-10 12:07:55,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2018-11-10 12:07:55,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2018-11-10 12:07:55,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 114 transitions. [2018-11-10 12:07:55,751 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 114 transitions. Word has length 105 [2018-11-10 12:07:55,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 12:07:55,752 INFO L481 AbstractCegarLoop]: Abstraction has 113 states and 114 transitions. [2018-11-10 12:07:55,752 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-11-10 12:07:55,752 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 114 transitions. [2018-11-10 12:07:55,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2018-11-10 12:07:55,755 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 12:07:55,755 INFO L375 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 12:07:55,755 INFO L424 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 12:07:55,755 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 12:07:55,756 INFO L82 PathProgramCache]: Analyzing trace with hash -112468761, now seen corresponding path program 10 times [2018-11-10 12:07:55,756 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 12:07:55,756 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 12:07:55,756 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 12:07:55,756 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 12:07:55,757 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 12:07:55,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-10 12:07:55,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-10 12:07:55,941 INFO L442 BasicCegarLoop]: Counterexample might be feasible [2018-11-10 12:07:55,985 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.11 12:07:55 BoogieIcfgContainer [2018-11-10 12:07:55,985 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-10 12:07:55,985 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-11-10 12:07:55,986 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-11-10 12:07:55,986 INFO L276 PluginConnector]: Witness Printer initialized [2018-11-10 12:07:55,986 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.11 12:07:50" (3/4) ... [2018-11-10 12:07:55,987 INFO L138 WitnessPrinter]: Generating witness for reachability counterexample [2018-11-10 12:07:56,046 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_e05858fa-f936-42c2-9240-49d36c30c106/bin-2019/uautomizer/witness.graphml [2018-11-10 12:07:56,046 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-11-10 12:07:56,047 INFO L168 Benchmark]: Toolchain (without parser) took 5918.53 ms. Allocated memory was 1.0 GB in the beginning and 1.3 GB in the end (delta: 235.4 MB). Free memory was 960.2 MB in the beginning and 907.5 MB in the end (delta: 52.7 MB). Peak memory consumption was 288.1 MB. Max. memory is 11.5 GB. [2018-11-10 12:07:56,048 INFO L168 Benchmark]: CDTParser took 0.12 ms. Allocated memory is still 1.0 GB. Free memory is still 985.4 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-10 12:07:56,048 INFO L168 Benchmark]: CACSL2BoogieTranslator took 167.91 ms. Allocated memory is still 1.0 GB. Free memory was 960.2 MB in the beginning and 948.4 MB in the end (delta: 11.8 MB). Peak memory consumption was 11.8 MB. Max. memory is 11.5 GB. [2018-11-10 12:07:56,048 INFO L168 Benchmark]: Boogie Preprocessor took 35.10 ms. Allocated memory is still 1.0 GB. Free memory was 948.4 MB in the beginning and 945.7 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. [2018-11-10 12:07:56,049 INFO L168 Benchmark]: RCFGBuilder took 340.79 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 176.2 MB). Free memory was 945.7 MB in the beginning and 1.1 GB in the end (delta: -204.0 MB). Peak memory consumption was 14.9 MB. Max. memory is 11.5 GB. [2018-11-10 12:07:56,049 INFO L168 Benchmark]: TraceAbstraction took 5311.33 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 59.2 MB). Free memory was 1.1 GB in the beginning and 912.4 MB in the end (delta: 233.9 MB). Peak memory consumption was 293.2 MB. Max. memory is 11.5 GB. [2018-11-10 12:07:56,049 INFO L168 Benchmark]: Witness Printer took 60.50 ms. Allocated memory is still 1.3 GB. Free memory was 912.4 MB in the beginning and 907.5 MB in the end (delta: 4.9 MB). Peak memory consumption was 4.9 MB. Max. memory is 11.5 GB. [2018-11-10 12:07:56,051 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12 ms. Allocated memory is still 1.0 GB. Free memory is still 985.4 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 167.91 ms. Allocated memory is still 1.0 GB. Free memory was 960.2 MB in the beginning and 948.4 MB in the end (delta: 11.8 MB). Peak memory consumption was 11.8 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 35.10 ms. Allocated memory is still 1.0 GB. Free memory was 948.4 MB in the beginning and 945.7 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. * RCFGBuilder took 340.79 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 176.2 MB). Free memory was 945.7 MB in the beginning and 1.1 GB in the end (delta: -204.0 MB). Peak memory consumption was 14.9 MB. Max. memory is 11.5 GB. * TraceAbstraction took 5311.33 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 59.2 MB). Free memory was 1.1 GB in the beginning and 912.4 MB in the end (delta: 233.9 MB). Peak memory consumption was 293.2 MB. Max. memory is 11.5 GB. * Witness Printer took 60.50 ms. Allocated memory is still 1.3 GB. Free memory was 912.4 MB in the beginning and 907.5 MB in the end (delta: 4.9 MB). Peak memory consumption was 4.9 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 51]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L22] FCALL struct cont cont; VAL [cont={69:0}] [L23] FCALL struct dummy dummy; VAL [cont={69:0}, dummy={67:0}] [L24] FCALL struct dummy *dummies[10]; VAL [cont={69:0}, dummies={42:0}, dummy={67:0}] [L25] FCALL int a[10]; VAL [a={61:0}, cont={69:0}, dummies={42:0}, dummy={67:0}] [L26] int i, *pa; [L27] i = __VERIFIER_nondet_int() [L28] int j = 0; VAL [a={61:0}, cont={69:0}, dummies={42:0}, dummy={67:0}, i=3, j=0] [L28] COND TRUE j < 10 [L29] FCALL a[j] = __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=0, a={61:0}, cont={69:0}, dummies={42:0}, dummy={67:0}, i=3, j=0] [L30] FCALL dummies[j] = __VERIFIER_nondet_pointer() VAL [__VERIFIER_nondet_pointer()={43:53}, a={61:0}, cont={69:0}, dummies={42:0}, dummy={67:0}, i=3, j=0] [L28] j++ VAL [a={61:0}, cont={69:0}, dummies={42:0}, dummy={67:0}, i=3, j=1] [L28] COND TRUE j < 10 [L29] FCALL a[j] = __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=0, a={61:0}, cont={69:0}, dummies={42:0}, dummy={67:0}, i=3, j=1] [L30] FCALL dummies[j] = __VERIFIER_nondet_pointer() VAL [__VERIFIER_nondet_pointer()={68:51}, a={61:0}, cont={69:0}, dummies={42:0}, dummy={67:0}, i=3, j=1] [L28] j++ VAL [a={61:0}, cont={69:0}, dummies={42:0}, dummy={67:0}, i=3, j=2] [L28] COND TRUE j < 10 [L29] FCALL a[j] = __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=0, a={61:0}, cont={69:0}, dummies={42:0}, dummy={67:0}, i=3, j=2] [L30] FCALL dummies[j] = __VERIFIER_nondet_pointer() VAL [__VERIFIER_nondet_pointer()={50:64}, a={61:0}, cont={69:0}, dummies={42:0}, dummy={67:0}, i=3, j=2] [L28] j++ VAL [a={61:0}, cont={69:0}, dummies={42:0}, dummy={67:0}, i=3, j=3] [L28] COND TRUE j < 10 [L29] FCALL a[j] = __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=0, a={61:0}, cont={69:0}, dummies={42:0}, dummy={67:0}, i=3, j=3] [L30] FCALL dummies[j] = __VERIFIER_nondet_pointer() VAL [__VERIFIER_nondet_pointer()={54:44}, a={61:0}, cont={69:0}, dummies={42:0}, dummy={67:0}, i=3, j=3] [L28] j++ VAL [a={61:0}, cont={69:0}, dummies={42:0}, dummy={67:0}, i=3, j=4] [L28] COND TRUE j < 10 [L29] FCALL a[j] = __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=0, a={61:0}, cont={69:0}, dummies={42:0}, dummy={67:0}, i=3, j=4] [L30] FCALL dummies[j] = __VERIFIER_nondet_pointer() VAL [__VERIFIER_nondet_pointer()={65:60}, a={61:0}, cont={69:0}, dummies={42:0}, dummy={67:0}, i=3, j=4] [L28] j++ VAL [a={61:0}, cont={69:0}, dummies={42:0}, dummy={67:0}, i=3, j=5] [L28] COND TRUE j < 10 [L29] FCALL a[j] = __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=0, a={61:0}, cont={69:0}, dummies={42:0}, dummy={67:0}, i=3, j=5] [L30] FCALL dummies[j] = __VERIFIER_nondet_pointer() VAL [__VERIFIER_nondet_pointer()={66:57}, a={61:0}, cont={69:0}, dummies={42:0}, dummy={67:0}, i=3, j=5] [L28] j++ VAL [a={61:0}, cont={69:0}, dummies={42:0}, dummy={67:0}, i=3, j=6] [L28] COND TRUE j < 10 [L29] FCALL a[j] = __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=10, a={61:0}, cont={69:0}, dummies={42:0}, dummy={67:0}, i=3, j=6] [L30] FCALL dummies[j] = __VERIFIER_nondet_pointer() VAL [__VERIFIER_nondet_pointer()={63:45}, a={61:0}, cont={69:0}, dummies={42:0}, dummy={67:0}, i=3, j=6] [L28] j++ VAL [a={61:0}, cont={69:0}, dummies={42:0}, dummy={67:0}, i=3, j=7] [L28] COND TRUE j < 10 [L29] FCALL a[j] = __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=0, a={61:0}, cont={69:0}, dummies={42:0}, dummy={67:0}, i=3, j=7] [L30] FCALL dummies[j] = __VERIFIER_nondet_pointer() VAL [__VERIFIER_nondet_pointer()={55:41}, a={61:0}, cont={69:0}, dummies={42:0}, dummy={67:0}, i=3, j=7] [L28] j++ VAL [a={61:0}, cont={69:0}, dummies={42:0}, dummy={67:0}, i=3, j=8] [L28] COND TRUE j < 10 [L29] FCALL a[j] = __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=0, a={61:0}, cont={69:0}, dummies={42:0}, dummy={67:0}, i=3, j=8] [L30] FCALL dummies[j] = __VERIFIER_nondet_pointer() VAL [__VERIFIER_nondet_pointer()={48:56}, a={61:0}, cont={69:0}, dummies={42:0}, dummy={67:0}, i=3, j=8] [L28] j++ VAL [a={61:0}, cont={69:0}, dummies={42:0}, dummy={67:0}, i=3, j=9] [L28] COND TRUE j < 10 [L29] FCALL a[j] = __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=0, a={61:0}, cont={69:0}, dummies={42:0}, dummy={67:0}, i=3, j=9] [L30] FCALL dummies[j] = __VERIFIER_nondet_pointer() VAL [__VERIFIER_nondet_pointer()={58:47}, a={61:0}, cont={69:0}, dummies={42:0}, dummy={67:0}, i=3, j=9] [L28] j++ VAL [a={61:0}, cont={69:0}, dummies={42:0}, dummy={67:0}, i=3, j=10] [L28] COND FALSE !(j < 10) VAL [a={61:0}, cont={69:0}, dummies={42:0}, dummy={67:0}, i=3, j=10] [L32] COND TRUE i >= 0 && i < 9 VAL [a={61:0}, cont={69:0}, dummies={42:0}, dummy={67:0}, i=3, j=10] [L33] FCALL a[i] = i VAL [a={61:0}, cont={69:0}, dummies={42:0}, dummy={67:0}, i=3, j=10] [L34] FCALL dummy.array = &a[i] VAL [a={61:0}, cont={69:0}, dummies={42:0}, dummy={67:0}, i=3, j=10] [L35] FCALL dummies[i + 1] = &dummy VAL [a={61:0}, cont={69:0}, dummies={42:0}, dummy={67:0}, i=3, j=10] [L36] FCALL cont.array = &dummies[0] VAL [a={61:0}, cont={69:0}, dummies={42:0}, dummy={67:0}, i=3, j=10] [L37] EXPR, FCALL cont.array VAL [a={61:0}, cont={69:0}, cont.array={42:0}, dummies={42:0}, dummy={67:0}, i=3, j=10] [L37] EXPR, FCALL cont.array[i] VAL [a={61:0}, cont={69:0}, cont.array={42:0}, cont.array[i]={54:44}, dummies={42:0}, dummy={67:0}, i=3, j=10] [L37] EXPR, FCALL cont.array[i]->array VAL [a={61:0}, cont={69:0}, cont.array={42:0}, cont.array[i]={54:44}, cont.array[i]->array={46:-12}, dummies={42:0}, dummy={67:0}, i=3, j=10] [L37] pa = &cont.array[i]->array[i] [L38] EXPR, FCALL a[i] VAL [a={61:0}, a[i]=3, cont={69:0}, dummies={42:0}, dummy={67:0}, i=3, j=10, pa={46:0}] [L38] COND TRUE a[i] > 0 [L39] EXPR, FCALL dummies[i + 1] VAL [a={61:0}, cont={69:0}, dummies={42:0}, dummies[i + 1]={67:0}, dummy={67:0}, i=3, j=10, pa={46:0}] [L39] EXPR, FCALL dummies[i + 1]->array VAL [a={61:0}, cont={69:0}, dummies={42:0}, dummies[i + 1]={67:0}, dummies[i + 1]->array={61:12}, dummy={67:0}, i=3, j=10, pa={46:0}] [L39] EXPR, FCALL dummies[i + 1]->array[i] VAL [a={61:0}, cont={69:0}, dummies={42:0}, dummies[i + 1]={67:0}, dummies[i + 1]->array={61:12}, dummies[i + 1]->array[i]=10, dummy={67:0}, i=3, j=10, pa={46:0}] [L39] i = dummies[i + 1]->array[i] - 10 [L40] EXPR, FCALL \read(*pa) VAL [\read(*pa)=0, a={61:0}, cont={69:0}, dummies={42:0}, dummy={67:0}, i=0, j=10, pa={46:0}] [L40] COND FALSE !(i < *pa) [L43] CALL, EXPR check(&cont, i) VAL [\old(i)=0, pc={69:0}] [L17] EXPR, FCALL pc->array VAL [\old(i)=0, i=0, pc={69:0}, pc={69:0}, pc->array={42:0}] [L17] EXPR, FCALL pc->array[i] VAL [\old(i)=0, i=0, pc={69:0}, pc={69:0}, pc->array={42:0}, pc->array[i]={43:53}] [L17] EXPR, FCALL pc->array[i]->array VAL [\old(i)=0, i=0, pc={69:0}, pc={69:0}, pc->array={42:0}, pc->array[i]={43:53}, pc->array[i]->array={49:-2}] [L17] EXPR, FCALL pc->array[i]->array[i] VAL [\old(i)=0, i=0, pc={69:0}, pc={69:0}, pc->array={42:0}, pc->array[i]={43:53}, pc->array[i]->array={49:-2}, pc->array[i]->array[i]=52] [L17] RET return pc->array[i]->array[i] == i; [L43] EXPR check(&cont, i) VAL [a={61:0}, check(&cont, i)=0, cont={69:0}, dummies={42:0}, dummy={67:0}, i=0, j=10, pa={46:0}] [L43] COND TRUE !check(&cont, i) [L51] __VERIFIER_error() VAL [a={61:0}, cont={69:0}, dummies={42:0}, dummy={67:0}, i=0, j=10, pa={46:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 69 locations, 1 error locations. UNSAFE Result, 5.2s OverallTime, 12 OverallIterations, 11 TraceHistogramMax, 0.5s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 514 SDtfs, 275 SDslu, 2061 SDs, 0 SdLazy, 328 SolverSat, 13 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 761 GetRequests, 697 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=113occurred in iteration=11, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 11 MinimizatonAttempts, 45 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.1s SsaConstructionTime, 2.9s SatisfiabilityAnalysisTime, 0.9s InterpolantComputationTime, 1579 NumberOfCodeBlocks, 1579 NumberOfCodeBlocksAsserted, 47 NumberOfCheckSat, 1447 ConstructedInterpolants, 0 QuantifiedInterpolants, 226129 SizeOfPredicates, 9 NumberOfNonLiveVariables, 1836 ConjunctsInSsa, 63 ConjunctsInUnsatCore, 20 InterpolantComputations, 2 PerfectInterpolantSequences, 0/1860 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...