./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loops/sum01_bug02_false-unreach-call_true-termination.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0cd3be1d Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_1236107c-1526-4d21-ab5e-cd60cab05436/bin-2019/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_1236107c-1526-4d21-ab5e-cd60cab05436/bin-2019/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_1236107c-1526-4d21-ab5e-cd60cab05436/bin-2019/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_1236107c-1526-4d21-ab5e-cd60cab05436/bin-2019/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loops/sum01_bug02_false-unreach-call_true-termination.i -s /tmp/vcloud-vcloud-master/worker/working_dir_1236107c-1526-4d21-ab5e-cd60cab05436/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_1236107c-1526-4d21-ab5e-cd60cab05436/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 c5465a084053aead702161d951dd339bfa1665d5 ...................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 0.1.23-0cd3be1 [2018-11-28 12:25:35,956 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-28 12:25:35,957 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-28 12:25:35,964 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-28 12:25:35,964 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-28 12:25:35,965 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-28 12:25:35,966 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-28 12:25:35,967 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-28 12:25:35,968 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-28 12:25:35,968 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-28 12:25:35,969 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-28 12:25:35,969 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-28 12:25:35,970 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-28 12:25:35,971 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-28 12:25:35,972 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-28 12:25:35,972 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-28 12:25:35,973 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-28 12:25:35,974 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-28 12:25:35,976 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-28 12:25:35,977 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-28 12:25:35,977 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-28 12:25:35,978 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-28 12:25:35,980 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-28 12:25:35,980 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-28 12:25:35,980 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-28 12:25:35,980 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-28 12:25:35,981 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-28 12:25:35,982 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-28 12:25:35,983 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-28 12:25:35,983 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-28 12:25:35,983 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-28 12:25:35,984 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-28 12:25:35,984 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-28 12:25:35,984 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-28 12:25:35,985 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-28 12:25:35,985 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-28 12:25:35,985 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_1236107c-1526-4d21-ab5e-cd60cab05436/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2018-11-28 12:25:35,995 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-28 12:25:35,995 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-28 12:25:35,995 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-28 12:25:35,995 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-11-28 12:25:35,996 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-11-28 12:25:35,996 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-11-28 12:25:35,996 INFO L133 SettingsManager]: * Use SBE=true [2018-11-28 12:25:35,996 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-28 12:25:35,996 INFO L133 SettingsManager]: * sizeof long=4 [2018-11-28 12:25:35,997 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-28 12:25:35,997 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-11-28 12:25:35,997 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-28 12:25:35,997 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-28 12:25:35,997 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-28 12:25:35,997 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-28 12:25:35,997 INFO L133 SettingsManager]: * sizeof long double=12 [2018-11-28 12:25:35,997 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-28 12:25:35,997 INFO L133 SettingsManager]: * Use constant arrays=true [2018-11-28 12:25:35,997 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-28 12:25:35,998 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-28 12:25:35,998 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-28 12:25:35,999 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-28 12:25:35,999 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-28 12:25:35,999 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-28 12:25:35,999 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-28 12:25:35,999 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-28 12:25:35,999 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-28 12:25:35,999 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-11-28 12:25:36,000 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-28 12:25:36,000 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-28 12:25:36,000 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_1236107c-1526-4d21-ab5e-cd60cab05436/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 -> c5465a084053aead702161d951dd339bfa1665d5 [2018-11-28 12:25:36,024 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-28 12:25:36,032 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-28 12:25:36,034 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-28 12:25:36,035 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-28 12:25:36,035 INFO L276 PluginConnector]: CDTParser initialized [2018-11-28 12:25:36,035 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_1236107c-1526-4d21-ab5e-cd60cab05436/bin-2019/uautomizer/../../sv-benchmarks/c/loops/sum01_bug02_false-unreach-call_true-termination.i [2018-11-28 12:25:36,070 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_1236107c-1526-4d21-ab5e-cd60cab05436/bin-2019/uautomizer/data/6543eee74/5ddd45bfc68f4f4fb5a64b9b0c2b9ad0/FLAGb04a3c99c [2018-11-28 12:25:36,463 INFO L307 CDTParser]: Found 1 translation units. [2018-11-28 12:25:36,463 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_1236107c-1526-4d21-ab5e-cd60cab05436/sv-benchmarks/c/loops/sum01_bug02_false-unreach-call_true-termination.i [2018-11-28 12:25:36,467 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_1236107c-1526-4d21-ab5e-cd60cab05436/bin-2019/uautomizer/data/6543eee74/5ddd45bfc68f4f4fb5a64b9b0c2b9ad0/FLAGb04a3c99c [2018-11-28 12:25:36,475 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_1236107c-1526-4d21-ab5e-cd60cab05436/bin-2019/uautomizer/data/6543eee74/5ddd45bfc68f4f4fb5a64b9b0c2b9ad0 [2018-11-28 12:25:36,477 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-28 12:25:36,478 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-11-28 12:25:36,479 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-28 12:25:36,479 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-28 12:25:36,481 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-28 12:25:36,482 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 12:25:36" (1/1) ... [2018-11-28 12:25:36,483 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7bce3877 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:25:36, skipping insertion in model container [2018-11-28 12:25:36,483 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 12:25:36" (1/1) ... [2018-11-28 12:25:36,488 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-28 12:25:36,498 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-11-28 12:25:36,596 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-11-28 12:25:36,599 INFO L191 MainTranslator]: Completed pre-run [2018-11-28 12:25:36,612 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-11-28 12:25:36,623 INFO L195 MainTranslator]: Completed translation [2018-11-28 12:25:36,623 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:25:36 WrapperNode [2018-11-28 12:25:36,623 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-28 12:25:36,624 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-28 12:25:36,624 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-28 12:25:36,624 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-28 12:25:36,629 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:25:36" (1/1) ... [2018-11-28 12:25:36,632 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:25:36" (1/1) ... [2018-11-28 12:25:36,636 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-28 12:25:36,636 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-28 12:25:36,636 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-28 12:25:36,637 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-28 12:25:36,642 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:25:36" (1/1) ... [2018-11-28 12:25:36,642 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:25:36" (1/1) ... [2018-11-28 12:25:36,643 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:25:36" (1/1) ... [2018-11-28 12:25:36,643 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:25:36" (1/1) ... [2018-11-28 12:25:36,645 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:25:36" (1/1) ... [2018-11-28 12:25:36,648 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:25:36" (1/1) ... [2018-11-28 12:25:36,649 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:25:36" (1/1) ... [2018-11-28 12:25:36,687 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-28 12:25:36,687 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-28 12:25:36,687 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-28 12:25:36,687 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-28 12:25:36,688 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:25:36" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_1236107c-1526-4d21-ab5e-cd60cab05436/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 [2018-11-28 12:25:36,724 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-28 12:25:36,724 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-28 12:25:36,724 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-28 12:25:36,724 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-28 12:25:36,724 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-28 12:25:36,724 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-28 12:25:36,724 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2018-11-28 12:25:36,724 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2018-11-28 12:25:36,817 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-28 12:25:36,817 INFO L280 CfgBuilder]: Removed 1 assue(true) statements. [2018-11-28 12:25:36,818 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 12:25:36 BoogieIcfgContainer [2018-11-28 12:25:36,818 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-28 12:25:36,818 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-28 12:25:36,819 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-28 12:25:36,821 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-28 12:25:36,821 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 12:25:36" (1/3) ... [2018-11-28 12:25:36,822 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a151ccf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 12:25:36, skipping insertion in model container [2018-11-28 12:25:36,822 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:25:36" (2/3) ... [2018-11-28 12:25:36,822 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a151ccf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 12:25:36, skipping insertion in model container [2018-11-28 12:25:36,823 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 12:25:36" (3/3) ... [2018-11-28 12:25:36,824 INFO L112 eAbstractionObserver]: Analyzing ICFG sum01_bug02_false-unreach-call_true-termination.i [2018-11-28 12:25:36,830 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-28 12:25:36,834 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-28 12:25:36,843 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-28 12:25:36,860 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-11-28 12:25:36,861 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-28 12:25:36,861 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-28 12:25:36,861 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-28 12:25:36,861 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-28 12:25:36,861 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-28 12:25:36,861 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-28 12:25:36,861 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-28 12:25:36,862 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-28 12:25:36,871 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2018-11-28 12:25:36,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-11-28 12:25:36,875 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:25:36,875 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:25:36,876 INFO L423 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:25:36,879 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:25:36,880 INFO L82 PathProgramCache]: Analyzing trace with hash -146959038, now seen corresponding path program 1 times [2018-11-28 12:25:36,881 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:25:36,881 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:25:36,915 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:25:36,915 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 12:25:36,916 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:25:36,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:25:36,953 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 12:25:36,954 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-28 12:25:36,954 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-11-28 12:25:36,957 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-11-28 12:25:36,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-11-28 12:25:36,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-11-28 12:25:36,966 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 2 states. [2018-11-28 12:25:36,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:25:36,979 INFO L93 Difference]: Finished difference Result 31 states and 35 transitions. [2018-11-28 12:25:36,980 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-11-28 12:25:36,981 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2018-11-28 12:25:36,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:25:36,987 INFO L225 Difference]: With dead ends: 31 [2018-11-28 12:25:36,987 INFO L226 Difference]: Without dead ends: 14 [2018-11-28 12:25:36,990 INFO L631 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 [2018-11-28 12:25:37,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-11-28 12:25:37,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-11-28 12:25:37,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-11-28 12:25:37,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2018-11-28 12:25:37,014 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 10 [2018-11-28 12:25:37,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:25:37,014 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2018-11-28 12:25:37,014 INFO L481 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-11-28 12:25:37,014 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2018-11-28 12:25:37,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-11-28 12:25:37,015 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:25:37,015 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:25:37,015 INFO L423 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:25:37,015 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:25:37,015 INFO L82 PathProgramCache]: Analyzing trace with hash -158964811, now seen corresponding path program 1 times [2018-11-28 12:25:37,016 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:25:37,016 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:25:37,016 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:25:37,017 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 12:25:37,017 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:25:37,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:25:37,060 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 12:25:37,060 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-28 12:25:37,060 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-28 12:25:37,061 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-28 12:25:37,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-28 12:25:37,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-28 12:25:37,062 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 5 states. [2018-11-28 12:25:37,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:25:37,088 INFO L93 Difference]: Finished difference Result 23 states and 25 transitions. [2018-11-28 12:25:37,089 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-28 12:25:37,089 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2018-11-28 12:25:37,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:25:37,089 INFO L225 Difference]: With dead ends: 23 [2018-11-28 12:25:37,089 INFO L226 Difference]: Without dead ends: 18 [2018-11-28 12:25:37,090 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-11-28 12:25:37,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-11-28 12:25:37,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2018-11-28 12:25:37,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-11-28 12:25:37,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2018-11-28 12:25:37,093 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 10 [2018-11-28 12:25:37,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:25:37,093 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2018-11-28 12:25:37,093 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-28 12:25:37,093 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2018-11-28 12:25:37,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-11-28 12:25:37,093 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:25:37,094 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:25:37,094 INFO L423 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:25:37,094 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:25:37,094 INFO L82 PathProgramCache]: Analyzing trace with hash 1017948080, now seen corresponding path program 1 times [2018-11-28 12:25:37,094 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:25:37,094 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:25:37,095 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:25:37,095 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 12:25:37,095 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:25:37,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:25:37,265 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 12:25:37,266 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 12:25:37,266 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_1236107c-1526-4d21-ab5e-cd60cab05436/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 [2018-11-28 12:25:37,284 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 12:25:37,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:25:37,298 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:25:37,428 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 12:25:37,451 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 12:25:37,451 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2018-11-28 12:25:37,451 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-11-28 12:25:37,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-11-28 12:25:37,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2018-11-28 12:25:37,452 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand 14 states. [2018-11-28 12:25:37,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:25:37,621 INFO L93 Difference]: Finished difference Result 40 states and 46 transitions. [2018-11-28 12:25:37,622 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-11-28 12:25:37,622 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 14 [2018-11-28 12:25:37,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:25:37,624 INFO L225 Difference]: With dead ends: 40 [2018-11-28 12:25:37,624 INFO L226 Difference]: Without dead ends: 34 [2018-11-28 12:25:37,624 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2018-11-28 12:25:37,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-11-28 12:25:37,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 27. [2018-11-28 12:25:37,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-11-28 12:25:37,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2018-11-28 12:25:37,629 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 14 [2018-11-28 12:25:37,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:25:37,630 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2018-11-28 12:25:37,630 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-11-28 12:25:37,630 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2018-11-28 12:25:37,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-11-28 12:25:37,630 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:25:37,631 INFO L402 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:25:37,631 INFO L423 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:25:37,631 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:25:37,631 INFO L82 PathProgramCache]: Analyzing trace with hash -852639511, now seen corresponding path program 1 times [2018-11-28 12:25:37,631 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:25:37,631 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:25:37,632 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:25:37,632 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 12:25:37,632 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:25:37,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:25:37,651 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-11-28 12:25:37,651 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-28 12:25:37,651 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-11-28 12:25:37,651 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-28 12:25:37,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-28 12:25:37,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-28 12:25:37,652 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand 3 states. [2018-11-28 12:25:37,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:25:37,662 INFO L93 Difference]: Finished difference Result 36 states and 41 transitions. [2018-11-28 12:25:37,663 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-28 12:25:37,663 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2018-11-28 12:25:37,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:25:37,663 INFO L225 Difference]: With dead ends: 36 [2018-11-28 12:25:37,663 INFO L226 Difference]: Without dead ends: 23 [2018-11-28 12:25:37,664 INFO L631 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 [2018-11-28 12:25:37,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-11-28 12:25:37,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-11-28 12:25:37,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-11-28 12:25:37,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2018-11-28 12:25:37,667 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 18 [2018-11-28 12:25:37,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:25:37,668 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2018-11-28 12:25:37,668 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-28 12:25:37,668 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2018-11-28 12:25:37,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-11-28 12:25:37,670 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:25:37,670 INFO L402 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:25:37,670 INFO L423 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:25:37,670 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:25:37,670 INFO L82 PathProgramCache]: Analyzing trace with hash -1920151575, now seen corresponding path program 2 times [2018-11-28 12:25:37,670 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:25:37,671 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:25:37,671 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:25:37,671 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 12:25:37,671 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:25:37,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:25:37,707 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 12:25:37,708 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 12:25:37,708 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_1236107c-1526-4d21-ab5e-cd60cab05436/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 [2018-11-28 12:25:37,719 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-28 12:25:37,725 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-28 12:25:37,725 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 12:25:37,727 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:25:37,767 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 12:25:37,790 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 12:25:37,790 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2018-11-28 12:25:37,791 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-11-28 12:25:37,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-11-28 12:25:37,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2018-11-28 12:25:37,792 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand 8 states. [2018-11-28 12:25:37,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:25:37,819 INFO L93 Difference]: Finished difference Result 32 states and 35 transitions. [2018-11-28 12:25:37,820 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-28 12:25:37,820 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 18 [2018-11-28 12:25:37,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:25:37,821 INFO L225 Difference]: With dead ends: 32 [2018-11-28 12:25:37,821 INFO L226 Difference]: Without dead ends: 23 [2018-11-28 12:25:37,821 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2018-11-28 12:25:37,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-11-28 12:25:37,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-11-28 12:25:37,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-11-28 12:25:37,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2018-11-28 12:25:37,825 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 18 [2018-11-28 12:25:37,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:25:37,826 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2018-11-28 12:25:37,826 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-11-28 12:25:37,826 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2018-11-28 12:25:37,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-11-28 12:25:37,826 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:25:37,826 INFO L402 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:25:37,826 INFO L423 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:25:37,827 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:25:37,827 INFO L82 PathProgramCache]: Analyzing trace with hash -1780946716, now seen corresponding path program 3 times [2018-11-28 12:25:37,827 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:25:37,827 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:25:37,827 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:25:37,827 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 12:25:37,827 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:25:37,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:25:37,870 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 12:25:37,870 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 12:25:37,870 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_1236107c-1526-4d21-ab5e-cd60cab05436/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 [2018-11-28 12:25:37,879 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-28 12:25:37,886 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-11-28 12:25:37,886 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 12:25:37,888 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:25:37,927 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 12:25:37,942 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 12:25:37,942 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2018-11-28 12:25:37,943 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-11-28 12:25:37,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-11-28 12:25:37,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=76, Unknown=0, NotChecked=0, Total=132 [2018-11-28 12:25:37,943 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand 12 states. [2018-11-28 12:25:37,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:25:37,976 INFO L93 Difference]: Finished difference Result 34 states and 37 transitions. [2018-11-28 12:25:37,976 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-28 12:25:37,977 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 22 [2018-11-28 12:25:37,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:25:37,977 INFO L225 Difference]: With dead ends: 34 [2018-11-28 12:25:37,977 INFO L226 Difference]: Without dead ends: 25 [2018-11-28 12:25:37,978 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=56, Invalid=76, Unknown=0, NotChecked=0, Total=132 [2018-11-28 12:25:37,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-11-28 12:25:37,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2018-11-28 12:25:37,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-11-28 12:25:37,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2018-11-28 12:25:37,982 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 22 [2018-11-28 12:25:37,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:25:37,982 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2018-11-28 12:25:37,982 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-11-28 12:25:37,982 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2018-11-28 12:25:37,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-11-28 12:25:37,983 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:25:37,983 INFO L402 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:25:37,984 INFO L423 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:25:37,984 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:25:37,984 INFO L82 PathProgramCache]: Analyzing trace with hash -971600090, now seen corresponding path program 2 times [2018-11-28 12:25:37,984 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:25:37,984 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:25:37,985 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:25:37,985 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 12:25:37,985 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:25:37,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:25:38,124 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-11-28 12:25:38,124 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 12:25:38,124 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_1236107c-1526-4d21-ab5e-cd60cab05436/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 [2018-11-28 12:25:38,130 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-28 12:25:38,140 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-28 12:25:38,140 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 12:25:38,142 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:25:38,275 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 12:25:38,290 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 12:25:38,290 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 19 [2018-11-28 12:25:38,291 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-11-28 12:25:38,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-11-28 12:25:38,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2018-11-28 12:25:38,291 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 19 states. [2018-11-28 12:25:38,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:25:38,548 INFO L93 Difference]: Finished difference Result 42 states and 46 transitions. [2018-11-28 12:25:38,549 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-11-28 12:25:38,549 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2018-11-28 12:25:38,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:25:38,550 INFO L225 Difference]: With dead ends: 42 [2018-11-28 12:25:38,550 INFO L226 Difference]: Without dead ends: 36 [2018-11-28 12:25:38,550 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=155, Invalid=901, Unknown=0, NotChecked=0, Total=1056 [2018-11-28 12:25:38,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-11-28 12:25:38,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 28. [2018-11-28 12:25:38,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-11-28 12:25:38,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2018-11-28 12:25:38,554 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 22 [2018-11-28 12:25:38,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:25:38,555 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2018-11-28 12:25:38,555 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-11-28 12:25:38,555 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2018-11-28 12:25:38,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-11-28 12:25:38,555 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:25:38,556 INFO L402 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:25:38,556 INFO L423 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:25:38,556 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:25:38,556 INFO L82 PathProgramCache]: Analyzing trace with hash -131462049, now seen corresponding path program 4 times [2018-11-28 12:25:38,556 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:25:38,556 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:25:38,557 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:25:38,557 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 12:25:38,557 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:25:38,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:25:38,614 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 10 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 12:25:38,614 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 12:25:38,614 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_1236107c-1526-4d21-ab5e-cd60cab05436/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 [2018-11-28 12:25:38,620 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-28 12:25:38,627 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-28 12:25:38,627 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 12:25:38,628 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:25:38,676 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 10 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 12:25:38,691 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 12:25:38,691 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2018-11-28 12:25:38,691 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-11-28 12:25:38,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-11-28 12:25:38,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=141, Unknown=0, NotChecked=0, Total=240 [2018-11-28 12:25:38,692 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 16 states. [2018-11-28 12:25:38,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:25:38,729 INFO L93 Difference]: Finished difference Result 42 states and 46 transitions. [2018-11-28 12:25:38,729 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-11-28 12:25:38,729 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 26 [2018-11-28 12:25:38,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:25:38,730 INFO L225 Difference]: With dead ends: 42 [2018-11-28 12:25:38,730 INFO L226 Difference]: Without dead ends: 33 [2018-11-28 12:25:38,730 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=99, Invalid=141, Unknown=0, NotChecked=0, Total=240 [2018-11-28 12:25:38,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-11-28 12:25:38,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2018-11-28 12:25:38,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-11-28 12:25:38,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2018-11-28 12:25:38,735 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 26 [2018-11-28 12:25:38,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:25:38,735 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2018-11-28 12:25:38,735 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-11-28 12:25:38,735 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2018-11-28 12:25:38,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-11-28 12:25:38,736 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:25:38,736 INFO L402 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:25:38,736 INFO L423 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:25:38,736 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:25:38,736 INFO L82 PathProgramCache]: Analyzing trace with hash -1107887526, now seen corresponding path program 5 times [2018-11-28 12:25:38,736 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:25:38,737 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:25:38,737 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:25:38,737 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 12:25:38,737 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:25:38,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:25:38,812 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 13 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 12:25:38,812 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 12:25:38,812 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_1236107c-1526-4d21-ab5e-cd60cab05436/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 [2018-11-28 12:25:38,824 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-28 12:25:38,832 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-11-28 12:25:38,832 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 12:25:38,833 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:25:38,893 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 13 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 12:25:38,908 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 12:25:38,909 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2018-11-28 12:25:38,909 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-11-28 12:25:38,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-11-28 12:25:38,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=226, Unknown=0, NotChecked=0, Total=380 [2018-11-28 12:25:38,910 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand 20 states. [2018-11-28 12:25:38,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:25:38,948 INFO L93 Difference]: Finished difference Result 47 states and 51 transitions. [2018-11-28 12:25:38,949 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-11-28 12:25:38,949 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 30 [2018-11-28 12:25:38,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:25:38,949 INFO L225 Difference]: With dead ends: 47 [2018-11-28 12:25:38,949 INFO L226 Difference]: Without dead ends: 38 [2018-11-28 12:25:38,950 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=154, Invalid=226, Unknown=0, NotChecked=0, Total=380 [2018-11-28 12:25:38,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2018-11-28 12:25:38,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 36. [2018-11-28 12:25:38,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-11-28 12:25:38,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2018-11-28 12:25:38,954 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 30 [2018-11-28 12:25:38,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:25:38,954 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2018-11-28 12:25:38,954 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-11-28 12:25:38,954 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2018-11-28 12:25:38,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-11-28 12:25:38,955 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:25:38,955 INFO L402 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:25:38,955 INFO L423 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:25:38,955 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:25:38,955 INFO L82 PathProgramCache]: Analyzing trace with hash -682200363, now seen corresponding path program 6 times [2018-11-28 12:25:38,955 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:25:38,955 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:25:38,956 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:25:38,956 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 12:25:38,956 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:25:38,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-28 12:25:38,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-28 12:25:38,989 INFO L469 BasicCegarLoop]: Counterexample might be feasible [2018-11-28 12:25:39,012 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 12:25:39 BoogieIcfgContainer [2018-11-28 12:25:39,012 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-28 12:25:39,012 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-11-28 12:25:39,012 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-11-28 12:25:39,012 INFO L276 PluginConnector]: Witness Printer initialized [2018-11-28 12:25:39,013 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 12:25:36" (3/4) ... [2018-11-28 12:25:39,015 INFO L138 WitnessPrinter]: Generating witness for reachability counterexample [2018-11-28 12:25:39,047 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_1236107c-1526-4d21-ab5e-cd60cab05436/bin-2019/uautomizer/witness.graphml [2018-11-28 12:25:39,047 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-11-28 12:25:39,048 INFO L168 Benchmark]: Toolchain (without parser) took 2570.24 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 207.6 MB). Free memory was 958.7 MB in the beginning and 1.1 GB in the end (delta: -167.7 MB). Peak memory consumption was 39.9 MB. Max. memory is 11.5 GB. [2018-11-28 12:25:39,049 INFO L168 Benchmark]: CDTParser took 0.11 ms. Allocated memory is still 1.0 GB. Free memory is still 985.0 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-28 12:25:39,049 INFO L168 Benchmark]: CACSL2BoogieTranslator took 144.78 ms. Allocated memory is still 1.0 GB. Free memory was 958.7 MB in the beginning and 947.9 MB in the end (delta: 10.8 MB). Peak memory consumption was 10.8 MB. Max. memory is 11.5 GB. [2018-11-28 12:25:39,049 INFO L168 Benchmark]: Boogie Procedure Inliner took 12.60 ms. Allocated memory is still 1.0 GB. Free memory is still 947.9 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-28 12:25:39,049 INFO L168 Benchmark]: Boogie Preprocessor took 50.57 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 146.8 MB). Free memory was 947.9 MB in the beginning and 1.2 GB in the end (delta: -204.5 MB). Peak memory consumption was 12.8 MB. Max. memory is 11.5 GB. [2018-11-28 12:25:39,050 INFO L168 Benchmark]: RCFGBuilder took 130.77 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.1 GB in the end (delta: 20.7 MB). Peak memory consumption was 20.7 MB. Max. memory is 11.5 GB. [2018-11-28 12:25:39,050 INFO L168 Benchmark]: TraceAbstraction took 2193.38 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 60.8 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 353.1 kB). Peak memory consumption was 61.2 MB. Max. memory is 11.5 GB. [2018-11-28 12:25:39,050 INFO L168 Benchmark]: Witness Printer took 35.03 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 4.9 MB). Peak memory consumption was 4.9 MB. Max. memory is 11.5 GB. [2018-11-28 12:25:39,052 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11 ms. Allocated memory is still 1.0 GB. Free memory is still 985.0 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 144.78 ms. Allocated memory is still 1.0 GB. Free memory was 958.7 MB in the beginning and 947.9 MB in the end (delta: 10.8 MB). Peak memory consumption was 10.8 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 12.60 ms. Allocated memory is still 1.0 GB. Free memory is still 947.9 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 50.57 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 146.8 MB). Free memory was 947.9 MB in the beginning and 1.2 GB in the end (delta: -204.5 MB). Peak memory consumption was 12.8 MB. Max. memory is 11.5 GB. * RCFGBuilder took 130.77 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.1 GB in the end (delta: 20.7 MB). Peak memory consumption was 20.7 MB. Max. memory is 11.5 GB. * TraceAbstraction took 2193.38 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 60.8 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 353.1 kB). Peak memory consumption was 61.2 MB. Max. memory is 11.5 GB. * Witness Printer took 35.03 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 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: 5]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L12] int i, j=10, n=__VERIFIER_nondet_uint(), sn=0; [L12] int i, j=10, n=__VERIFIER_nondet_uint(), sn=0; [L13] i=1 VAL [i=1, j=10, n=6, n=0] [L13] COND TRUE i<=n VAL [i=1, j=10, n=6, n=0] [L14] COND TRUE i