./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.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 635dfa2a Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_c14b86e6-c9db-46e8-8a79-f0f20ee68d23/bin-2019/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_c14b86e6-c9db-46e8-8a79-f0f20ee68d23/bin-2019/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_c14b86e6-c9db-46e8-8a79-f0f20ee68d23/bin-2019/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_c14b86e6-c9db-46e8-8a79-f0f20ee68d23/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_c14b86e6-c9db-46e8-8a79-f0f20ee68d23/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_c14b86e6-c9db-46e8-8a79-f0f20ee68d23/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 0.1.23-635dfa2 [2018-12-02 13:55:56,593 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-12-02 13:55:56,594 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-12-02 13:55:56,600 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-12-02 13:55:56,600 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-12-02 13:55:56,600 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-12-02 13:55:56,601 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-12-02 13:55:56,602 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-12-02 13:55:56,602 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-12-02 13:55:56,603 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-12-02 13:55:56,603 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-12-02 13:55:56,603 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-12-02 13:55:56,604 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-12-02 13:55:56,604 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-12-02 13:55:56,605 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-12-02 13:55:56,605 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-12-02 13:55:56,605 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-12-02 13:55:56,606 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-12-02 13:55:56,607 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-12-02 13:55:56,608 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-12-02 13:55:56,609 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-12-02 13:55:56,609 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-12-02 13:55:56,610 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-12-02 13:55:56,610 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-12-02 13:55:56,611 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-12-02 13:55:56,611 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-12-02 13:55:56,611 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-12-02 13:55:56,612 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-12-02 13:55:56,612 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-12-02 13:55:56,613 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-12-02 13:55:56,613 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-12-02 13:55:56,613 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-12-02 13:55:56,613 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-12-02 13:55:56,614 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-12-02 13:55:56,614 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-12-02 13:55:56,614 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-12-02 13:55:56,615 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_c14b86e6-c9db-46e8-8a79-f0f20ee68d23/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2018-12-02 13:55:56,622 INFO L110 SettingsManager]: Loading preferences was successful [2018-12-02 13:55:56,622 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-12-02 13:55:56,622 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-12-02 13:55:56,622 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-12-02 13:55:56,623 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-12-02 13:55:56,623 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-12-02 13:55:56,623 INFO L133 SettingsManager]: * Use SBE=true [2018-12-02 13:55:56,623 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-12-02 13:55:56,623 INFO L133 SettingsManager]: * sizeof long=4 [2018-12-02 13:55:56,623 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-12-02 13:55:56,623 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-12-02 13:55:56,623 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-12-02 13:55:56,623 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-12-02 13:55:56,624 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-12-02 13:55:56,624 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-12-02 13:55:56,624 INFO L133 SettingsManager]: * sizeof long double=12 [2018-12-02 13:55:56,624 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-12-02 13:55:56,624 INFO L133 SettingsManager]: * Use constant arrays=true [2018-12-02 13:55:56,624 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-12-02 13:55:56,624 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-12-02 13:55:56,624 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-12-02 13:55:56,624 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-12-02 13:55:56,624 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-12-02 13:55:56,624 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-02 13:55:56,625 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-12-02 13:55:56,625 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-12-02 13:55:56,625 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-12-02 13:55:56,625 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-12-02 13:55:56,625 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-12-02 13:55:56,625 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-12-02 13:55:56,625 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_c14b86e6-c9db-46e8-8a79-f0f20ee68d23/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 [2018-12-02 13:55:56,642 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-12-02 13:55:56,649 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-12-02 13:55:56,651 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-12-02 13:55:56,652 INFO L271 PluginConnector]: Initializing CDTParser... [2018-12-02 13:55:56,652 INFO L276 PluginConnector]: CDTParser initialized [2018-12-02 13:55:56,652 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_c14b86e6-c9db-46e8-8a79-f0f20ee68d23/bin-2019/uautomizer/../../sv-benchmarks/c/ldv-regression/test27_false-unreach-call_true-termination.c [2018-12-02 13:55:56,686 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_c14b86e6-c9db-46e8-8a79-f0f20ee68d23/bin-2019/uautomizer/data/871cdb6dd/85e87c9a5587431d8c03323ee73d07dd/FLAG39869aaae [2018-12-02 13:55:57,117 INFO L307 CDTParser]: Found 1 translation units. [2018-12-02 13:55:57,117 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_c14b86e6-c9db-46e8-8a79-f0f20ee68d23/sv-benchmarks/c/ldv-regression/test27_false-unreach-call_true-termination.c [2018-12-02 13:55:57,121 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_c14b86e6-c9db-46e8-8a79-f0f20ee68d23/bin-2019/uautomizer/data/871cdb6dd/85e87c9a5587431d8c03323ee73d07dd/FLAG39869aaae [2018-12-02 13:55:57,129 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_c14b86e6-c9db-46e8-8a79-f0f20ee68d23/bin-2019/uautomizer/data/871cdb6dd/85e87c9a5587431d8c03323ee73d07dd [2018-12-02 13:55:57,130 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-12-02 13:55:57,131 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-12-02 13:55:57,132 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-12-02 13:55:57,132 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-12-02 13:55:57,134 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-12-02 13:55:57,134 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 01:55:57" (1/1) ... [2018-12-02 13:55:57,136 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@325efab2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:55:57, skipping insertion in model container [2018-12-02 13:55:57,136 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 01:55:57" (1/1) ... [2018-12-02 13:55:57,140 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-12-02 13:55:57,149 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-12-02 13:55:57,242 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-02 13:55:57,248 INFO L191 MainTranslator]: Completed pre-run [2018-12-02 13:55:57,260 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-02 13:55:57,269 INFO L195 MainTranslator]: Completed translation [2018-12-02 13:55:57,269 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:55:57 WrapperNode [2018-12-02 13:55:57,270 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-12-02 13:55:57,270 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-12-02 13:55:57,270 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-12-02 13:55:57,270 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-12-02 13:55:57,275 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:55:57" (1/1) ... [2018-12-02 13:55:57,280 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:55:57" (1/1) ... [2018-12-02 13:55:57,284 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-12-02 13:55:57,285 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-12-02 13:55:57,285 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-12-02 13:55:57,285 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-12-02 13:55:57,320 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:55:57" (1/1) ... [2018-12-02 13:55:57,320 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:55:57" (1/1) ... [2018-12-02 13:55:57,322 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:55:57" (1/1) ... [2018-12-02 13:55:57,322 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:55:57" (1/1) ... [2018-12-02 13:55:57,329 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:55:57" (1/1) ... [2018-12-02 13:55:57,333 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:55:57" (1/1) ... [2018-12-02 13:55:57,334 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:55:57" (1/1) ... [2018-12-02 13:55:57,336 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-12-02 13:55:57,336 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-12-02 13:55:57,337 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-12-02 13:55:57,337 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-12-02 13:55:57,337 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:55:57" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_c14b86e6-c9db-46e8-8a79-f0f20ee68d23/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 [2018-12-02 13:55:57,369 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2018-12-02 13:55:57,369 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-12-02 13:55:57,369 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-12-02 13:55:57,369 INFO L130 BoogieDeclarations]: Found specification of procedure check [2018-12-02 13:55:57,370 INFO L138 BoogieDeclarations]: Found implementation of procedure check [2018-12-02 13:55:57,370 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2018-12-02 13:55:57,370 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2018-12-02 13:55:57,370 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-12-02 13:55:57,370 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-12-02 13:55:57,370 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-12-02 13:55:57,370 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-12-02 13:55:57,370 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-12-02 13:55:57,370 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2018-12-02 13:55:57,371 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-12-02 13:55:57,534 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-12-02 13:55:57,535 INFO L280 CfgBuilder]: Removed 2 assue(true) statements. [2018-12-02 13:55:57,535 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 01:55:57 BoogieIcfgContainer [2018-12-02 13:55:57,535 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-12-02 13:55:57,536 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-12-02 13:55:57,536 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-12-02 13:55:57,538 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-12-02 13:55:57,538 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 01:55:57" (1/3) ... [2018-12-02 13:55:57,538 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@754f755f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 01:55:57, skipping insertion in model container [2018-12-02 13:55:57,538 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:55:57" (2/3) ... [2018-12-02 13:55:57,539 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@754f755f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 01:55:57, skipping insertion in model container [2018-12-02 13:55:57,539 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 01:55:57" (3/3) ... [2018-12-02 13:55:57,540 INFO L112 eAbstractionObserver]: Analyzing ICFG test27_false-unreach-call_true-termination.c [2018-12-02 13:55:57,546 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-12-02 13:55:57,551 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-12-02 13:55:57,560 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-12-02 13:55:57,577 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-12-02 13:55:57,577 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-12-02 13:55:57,577 INFO L383 AbstractCegarLoop]: Hoare is true [2018-12-02 13:55:57,578 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-12-02 13:55:57,578 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-12-02 13:55:57,578 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-12-02 13:55:57,578 INFO L387 AbstractCegarLoop]: Difference is false [2018-12-02 13:55:57,578 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-12-02 13:55:57,578 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-12-02 13:55:57,588 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states. [2018-12-02 13:55:57,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-12-02 13:55:57,591 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 13:55:57,592 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 13:55:57,593 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-02 13:55:57,596 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 13:55:57,596 INFO L82 PathProgramCache]: Analyzing trace with hash -899836778, now seen corresponding path program 1 times [2018-12-02 13:55:57,598 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-02 13:55:57,598 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-02 13:55:57,625 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 13:55:57,625 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 13:55:57,625 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 13:55:57,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 13:55:57,680 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 13:55:57,681 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-02 13:55:57,681 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-12-02 13:55:57,683 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-12-02 13:55:57,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-12-02 13:55:57,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-12-02 13:55:57,692 INFO L87 Difference]: Start difference. First operand 25 states. Second operand 2 states. [2018-12-02 13:55:57,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 13:55:57,703 INFO L93 Difference]: Finished difference Result 42 states and 52 transitions. [2018-12-02 13:55:57,703 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-12-02 13:55:57,704 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 17 [2018-12-02 13:55:57,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 13:55:57,709 INFO L225 Difference]: With dead ends: 42 [2018-12-02 13:55:57,709 INFO L226 Difference]: Without dead ends: 20 [2018-12-02 13:55:57,711 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 [2018-12-02 13:55:57,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-12-02 13:55:57,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2018-12-02 13:55:57,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-12-02 13:55:57,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2018-12-02 13:55:57,731 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 17 [2018-12-02 13:55:57,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 13:55:57,732 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2018-12-02 13:55:57,732 INFO L481 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-12-02 13:55:57,732 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2018-12-02 13:55:57,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-12-02 13:55:57,732 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 13:55:57,733 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 13:55:57,733 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-02 13:55:57,733 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 13:55:57,733 INFO L82 PathProgramCache]: Analyzing trace with hash -1137678901, now seen corresponding path program 1 times [2018-12-02 13:55:57,733 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-02 13:55:57,733 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-02 13:55:57,734 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 13:55:57,734 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 13:55:57,734 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 13:55:57,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 13:55:57,774 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 13:55:57,774 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-02 13:55:57,774 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-12-02 13:55:57,775 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-12-02 13:55:57,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-12-02 13:55:57,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-12-02 13:55:57,776 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 3 states. [2018-12-02 13:55:57,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 13:55:57,793 INFO L93 Difference]: Finished difference Result 34 states and 36 transitions. [2018-12-02 13:55:57,794 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-12-02 13:55:57,794 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2018-12-02 13:55:57,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 13:55:57,795 INFO L225 Difference]: With dead ends: 34 [2018-12-02 13:55:57,795 INFO L226 Difference]: Without dead ends: 22 [2018-12-02 13:55:57,795 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 [2018-12-02 13:55:57,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-12-02 13:55:57,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2018-12-02 13:55:57,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-12-02 13:55:57,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2018-12-02 13:55:57,798 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 18 [2018-12-02 13:55:57,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 13:55:57,798 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2018-12-02 13:55:57,798 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-12-02 13:55:57,799 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2018-12-02 13:55:57,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-12-02 13:55:57,799 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 13:55:57,799 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 13:55:57,799 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-02 13:55:57,799 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 13:55:57,799 INFO L82 PathProgramCache]: Analyzing trace with hash 278779309, now seen corresponding path program 1 times [2018-12-02 13:55:57,800 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-02 13:55:57,800 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-02 13:55:57,800 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 13:55:57,800 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 13:55:57,800 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 13:55:57,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 13:55:57,836 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 13:55:57,836 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 13:55:57,836 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_c14b86e6-c9db-46e8-8a79-f0f20ee68d23/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 [2018-12-02 13:55:57,845 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 13:55:57,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 13:55:57,874 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 13:55:57,893 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 13:55:57,907 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-02 13:55:57,907 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2018-12-02 13:55:57,907 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-12-02 13:55:57,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-12-02 13:55:57,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-12-02 13:55:57,908 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 5 states. [2018-12-02 13:55:57,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 13:55:57,928 INFO L93 Difference]: Finished difference Result 36 states and 38 transitions. [2018-12-02 13:55:57,928 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-12-02 13:55:57,928 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2018-12-02 13:55:57,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 13:55:57,929 INFO L225 Difference]: With dead ends: 36 [2018-12-02 13:55:57,929 INFO L226 Difference]: Without dead ends: 24 [2018-12-02 13:55:57,929 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-12-02 13:55:57,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-12-02 13:55:57,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2018-12-02 13:55:57,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-12-02 13:55:57,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2018-12-02 13:55:57,932 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 20 [2018-12-02 13:55:57,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 13:55:57,932 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2018-12-02 13:55:57,932 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-12-02 13:55:57,932 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2018-12-02 13:55:57,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-12-02 13:55:57,933 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 13:55:57,933 INFO L402 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 13:55:57,933 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-02 13:55:57,933 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 13:55:57,933 INFO L82 PathProgramCache]: Analyzing trace with hash -9513713, now seen corresponding path program 2 times [2018-12-02 13:55:57,933 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-02 13:55:57,933 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-02 13:55:57,934 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 13:55:57,934 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 13:55:57,934 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 13:55:57,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 13:55:57,966 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 13:55:57,966 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 13:55:57,967 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_c14b86e6-c9db-46e8-8a79-f0f20ee68d23/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 [2018-12-02 13:55:57,974 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-12-02 13:55:58,015 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-12-02 13:55:58,015 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-02 13:55:58,018 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 13:55:58,025 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 13:55:58,042 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-02 13:55:58,042 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2018-12-02 13:55:58,043 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-12-02 13:55:58,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-12-02 13:55:58,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-12-02 13:55:58,043 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand 6 states. [2018-12-02 13:55:58,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 13:55:58,064 INFO L93 Difference]: Finished difference Result 38 states and 40 transitions. [2018-12-02 13:55:58,064 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-02 13:55:58,064 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 22 [2018-12-02 13:55:58,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 13:55:58,065 INFO L225 Difference]: With dead ends: 38 [2018-12-02 13:55:58,065 INFO L226 Difference]: Without dead ends: 26 [2018-12-02 13:55:58,066 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-12-02 13:55:58,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-12-02 13:55:58,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2018-12-02 13:55:58,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-12-02 13:55:58,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2018-12-02 13:55:58,069 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 22 [2018-12-02 13:55:58,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 13:55:58,069 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2018-12-02 13:55:58,069 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-12-02 13:55:58,070 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2018-12-02 13:55:58,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-12-02 13:55:58,070 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 13:55:58,070 INFO L402 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 13:55:58,070 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-02 13:55:58,071 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 13:55:58,071 INFO L82 PathProgramCache]: Analyzing trace with hash 2113766385, now seen corresponding path program 3 times [2018-12-02 13:55:58,071 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-02 13:55:58,071 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-02 13:55:58,072 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 13:55:58,072 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-02 13:55:58,072 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 13:55:58,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 13:55:58,126 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 13:55:58,126 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 13:55:58,126 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_c14b86e6-c9db-46e8-8a79-f0f20ee68d23/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 [2018-12-02 13:55:58,135 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-02 13:55:58,216 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-12-02 13:55:58,216 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-02 13:55:58,218 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 13:55:58,228 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 13:55:58,244 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-02 13:55:58,244 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2018-12-02 13:55:58,244 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-12-02 13:55:58,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-12-02 13:55:58,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-12-02 13:55:58,245 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand 7 states. [2018-12-02 13:55:58,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 13:55:58,273 INFO L93 Difference]: Finished difference Result 40 states and 42 transitions. [2018-12-02 13:55:58,274 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-12-02 13:55:58,274 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 24 [2018-12-02 13:55:58,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 13:55:58,274 INFO L225 Difference]: With dead ends: 40 [2018-12-02 13:55:58,274 INFO L226 Difference]: Without dead ends: 28 [2018-12-02 13:55:58,275 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-12-02 13:55:58,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-12-02 13:55:58,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2018-12-02 13:55:58,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-12-02 13:55:58,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2018-12-02 13:55:58,278 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 24 [2018-12-02 13:55:58,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 13:55:58,279 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2018-12-02 13:55:58,279 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-12-02 13:55:58,279 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2018-12-02 13:55:58,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-12-02 13:55:58,280 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 13:55:58,280 INFO L402 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 13:55:58,280 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-02 13:55:58,280 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 13:55:58,280 INFO L82 PathProgramCache]: Analyzing trace with hash -1818492333, now seen corresponding path program 4 times [2018-12-02 13:55:58,280 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-02 13:55:58,281 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-02 13:55:58,281 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 13:55:58,281 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-02 13:55:58,281 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 13:55:58,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 13:55:58,343 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 13:55:58,343 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 13:55:58,343 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_c14b86e6-c9db-46e8-8a79-f0f20ee68d23/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 [2018-12-02 13:55:58,349 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-02 13:55:58,375 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-02 13:55:58,375 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-02 13:55:58,376 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 13:55:58,383 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 13:55:58,407 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-02 13:55:58,407 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2018-12-02 13:55:58,407 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-12-02 13:55:58,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-12-02 13:55:58,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-12-02 13:55:58,408 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 8 states. [2018-12-02 13:55:58,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 13:55:58,436 INFO L93 Difference]: Finished difference Result 42 states and 44 transitions. [2018-12-02 13:55:58,437 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-12-02 13:55:58,437 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 26 [2018-12-02 13:55:58,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 13:55:58,437 INFO L225 Difference]: With dead ends: 42 [2018-12-02 13:55:58,438 INFO L226 Difference]: Without dead ends: 30 [2018-12-02 13:55:58,438 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-12-02 13:55:58,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-12-02 13:55:58,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2018-12-02 13:55:58,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-12-02 13:55:58,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2018-12-02 13:55:58,441 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 26 [2018-12-02 13:55:58,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 13:55:58,442 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2018-12-02 13:55:58,442 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-12-02 13:55:58,442 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2018-12-02 13:55:58,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-12-02 13:55:58,443 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 13:55:58,443 INFO L402 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 13:55:58,443 INFO L423 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-02 13:55:58,443 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 13:55:58,443 INFO L82 PathProgramCache]: Analyzing trace with hash -1147899851, now seen corresponding path program 5 times [2018-12-02 13:55:58,443 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-02 13:55:58,443 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-02 13:55:58,444 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 13:55:58,444 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-02 13:55:58,444 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 13:55:58,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 13:55:58,508 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 13:55:58,509 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 13:55:58,509 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_c14b86e6-c9db-46e8-8a79-f0f20ee68d23/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 [2018-12-02 13:55:58,515 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-12-02 13:55:59,401 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-12-02 13:55:59,401 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-02 13:55:59,403 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 13:55:59,410 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 13:55:59,425 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-02 13:55:59,426 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2018-12-02 13:55:59,426 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-12-02 13:55:59,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-12-02 13:55:59,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-12-02 13:55:59,426 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand 9 states. [2018-12-02 13:55:59,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 13:55:59,454 INFO L93 Difference]: Finished difference Result 44 states and 46 transitions. [2018-12-02 13:55:59,454 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-12-02 13:55:59,454 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 28 [2018-12-02 13:55:59,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 13:55:59,455 INFO L225 Difference]: With dead ends: 44 [2018-12-02 13:55:59,455 INFO L226 Difference]: Without dead ends: 32 [2018-12-02 13:55:59,455 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-12-02 13:55:59,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-12-02 13:55:59,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2018-12-02 13:55:59,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-12-02 13:55:59,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2018-12-02 13:55:59,458 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 28 [2018-12-02 13:55:59,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 13:55:59,458 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions. [2018-12-02 13:55:59,459 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-12-02 13:55:59,459 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions. [2018-12-02 13:55:59,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-12-02 13:55:59,459 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 13:55:59,459 INFO L402 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 13:55:59,460 INFO L423 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-02 13:55:59,460 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 13:55:59,460 INFO L82 PathProgramCache]: Analyzing trace with hash -953619049, now seen corresponding path program 6 times [2018-12-02 13:55:59,460 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-02 13:55:59,460 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-02 13:55:59,461 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 13:55:59,461 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-02 13:55:59,461 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 13:55:59,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 13:55:59,514 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 13:55:59,514 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 13:55:59,514 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_c14b86e6-c9db-46e8-8a79-f0f20ee68d23/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 [2018-12-02 13:55:59,520 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-12-02 13:55:59,974 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-12-02 13:55:59,974 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-02 13:55:59,977 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 13:55:59,985 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 13:56:00,002 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-02 13:56:00,002 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2018-12-02 13:56:00,002 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-12-02 13:56:00,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-12-02 13:56:00,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-12-02 13:56:00,003 INFO L87 Difference]: Start difference. First operand 31 states and 32 transitions. Second operand 10 states. [2018-12-02 13:56:00,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 13:56:00,035 INFO L93 Difference]: Finished difference Result 46 states and 48 transitions. [2018-12-02 13:56:00,036 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-12-02 13:56:00,036 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 30 [2018-12-02 13:56:00,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 13:56:00,036 INFO L225 Difference]: With dead ends: 46 [2018-12-02 13:56:00,036 INFO L226 Difference]: Without dead ends: 34 [2018-12-02 13:56:00,037 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-12-02 13:56:00,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-12-02 13:56:00,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2018-12-02 13:56:00,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-12-02 13:56:00,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2018-12-02 13:56:00,039 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 30 [2018-12-02 13:56:00,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 13:56:00,039 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2018-12-02 13:56:00,039 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-12-02 13:56:00,040 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2018-12-02 13:56:00,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-12-02 13:56:00,040 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 13:56:00,040 INFO L402 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 13:56:00,040 INFO L423 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-02 13:56:00,040 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 13:56:00,040 INFO L82 PathProgramCache]: Analyzing trace with hash 1066637945, now seen corresponding path program 7 times [2018-12-02 13:56:00,041 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-02 13:56:00,041 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-02 13:56:00,041 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 13:56:00,041 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-02 13:56:00,041 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 13:56:00,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 13:56:00,107 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 13:56:00,107 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 13:56:00,107 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_c14b86e6-c9db-46e8-8a79-f0f20ee68d23/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 [2018-12-02 13:56:00,115 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 13:56:00,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 13:56:00,135 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 13:56:00,144 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 13:56:00,159 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-02 13:56:00,159 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2018-12-02 13:56:00,159 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-12-02 13:56:00,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-12-02 13:56:00,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-12-02 13:56:00,159 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 11 states. [2018-12-02 13:56:00,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 13:56:00,186 INFO L93 Difference]: Finished difference Result 48 states and 50 transitions. [2018-12-02 13:56:00,187 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-12-02 13:56:00,187 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 32 [2018-12-02 13:56:00,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 13:56:00,187 INFO L225 Difference]: With dead ends: 48 [2018-12-02 13:56:00,187 INFO L226 Difference]: Without dead ends: 36 [2018-12-02 13:56:00,188 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-12-02 13:56:00,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-12-02 13:56:00,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2018-12-02 13:56:00,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-12-02 13:56:00,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2018-12-02 13:56:00,190 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 32 [2018-12-02 13:56:00,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 13:56:00,190 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2018-12-02 13:56:00,190 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-12-02 13:56:00,190 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2018-12-02 13:56:00,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-12-02 13:56:00,191 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 13:56:00,191 INFO L402 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 13:56:00,191 INFO L423 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-02 13:56:00,191 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 13:56:00,191 INFO L82 PathProgramCache]: Analyzing trace with hash 1208391387, now seen corresponding path program 8 times [2018-12-02 13:56:00,192 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-02 13:56:00,192 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-02 13:56:00,192 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 13:56:00,192 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 13:56:00,192 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 13:56:00,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 13:56:00,245 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 13:56:00,245 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 13:56:00,245 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_c14b86e6-c9db-46e8-8a79-f0f20ee68d23/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 [2018-12-02 13:56:00,253 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-12-02 13:56:00,286 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-12-02 13:56:00,286 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-02 13:56:00,288 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 13:56:00,296 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 13:56:00,311 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-02 13:56:00,311 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2018-12-02 13:56:00,311 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-12-02 13:56:00,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-12-02 13:56:00,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-12-02 13:56:00,312 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand 12 states. [2018-12-02 13:56:00,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 13:56:00,343 INFO L93 Difference]: Finished difference Result 50 states and 52 transitions. [2018-12-02 13:56:00,344 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-12-02 13:56:00,344 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 34 [2018-12-02 13:56:00,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 13:56:00,344 INFO L225 Difference]: With dead ends: 50 [2018-12-02 13:56:00,344 INFO L226 Difference]: Without dead ends: 38 [2018-12-02 13:56:00,345 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-12-02 13:56:00,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2018-12-02 13:56:00,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2018-12-02 13:56:00,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-12-02 13:56:00,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2018-12-02 13:56:00,347 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 34 [2018-12-02 13:56:00,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 13:56:00,347 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2018-12-02 13:56:00,347 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-12-02 13:56:00,347 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2018-12-02 13:56:00,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-12-02 13:56:00,348 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 13:56:00,348 INFO L402 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 13:56:00,348 INFO L423 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-02 13:56:00,348 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 13:56:00,348 INFO L82 PathProgramCache]: Analyzing trace with hash -5504323, now seen corresponding path program 9 times [2018-12-02 13:56:00,348 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-02 13:56:00,348 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-02 13:56:00,349 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 13:56:00,349 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-02 13:56:00,349 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 13:56:00,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 13:56:00,433 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 13:56:00,433 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 13:56:00,433 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_c14b86e6-c9db-46e8-8a79-f0f20ee68d23/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 [2018-12-02 13:56:00,439 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-02 13:56:04,476 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-12-02 13:56:04,476 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-02 13:56:04,479 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 13:56:04,487 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 13:56:04,506 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-02 13:56:04,506 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2018-12-02 13:56:04,506 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-12-02 13:56:04,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-12-02 13:56:04,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-12-02 13:56:04,506 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand 13 states. [2018-12-02 13:56:04,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 13:56:04,537 INFO L93 Difference]: Finished difference Result 51 states and 53 transitions. [2018-12-02 13:56:04,537 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-12-02 13:56:04,537 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 36 [2018-12-02 13:56:04,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 13:56:04,538 INFO L225 Difference]: With dead ends: 51 [2018-12-02 13:56:04,538 INFO L226 Difference]: Without dead ends: 39 [2018-12-02 13:56:04,538 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-12-02 13:56:04,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-12-02 13:56:04,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-12-02 13:56:04,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-12-02 13:56:04,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2018-12-02 13:56:04,541 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 36 [2018-12-02 13:56:04,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 13:56:04,541 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2018-12-02 13:56:04,542 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-12-02 13:56:04,542 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2018-12-02 13:56:04,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-12-02 13:56:04,542 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 13:56:04,542 INFO L402 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 13:56:04,542 INFO L423 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-02 13:56:04,542 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 13:56:04,543 INFO L82 PathProgramCache]: Analyzing trace with hash 1671822879, now seen corresponding path program 10 times [2018-12-02 13:56:04,543 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-02 13:56:04,543 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-02 13:56:04,543 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 13:56:04,543 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-02 13:56:04,543 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 13:56:04,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-02 13:56:04,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-02 13:56:04,768 INFO L469 BasicCegarLoop]: Counterexample might be feasible [2018-12-02 13:56:04,802 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.12 01:56:04 BoogieIcfgContainer [2018-12-02 13:56:04,802 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-12-02 13:56:04,802 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-12-02 13:56:04,802 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-12-02 13:56:04,802 INFO L276 PluginConnector]: Witness Printer initialized [2018-12-02 13:56:04,803 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 01:55:57" (3/4) ... [2018-12-02 13:56:04,805 INFO L138 WitnessPrinter]: Generating witness for reachability counterexample [2018-12-02 13:56:04,851 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_c14b86e6-c9db-46e8-8a79-f0f20ee68d23/bin-2019/uautomizer/witness.graphml [2018-12-02 13:56:04,852 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-12-02 13:56:04,852 INFO L168 Benchmark]: Toolchain (without parser) took 7721.69 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 206.6 MB). Free memory was 961.4 MB in the beginning and 1.0 GB in the end (delta: -66.4 MB). Peak memory consumption was 140.2 MB. Max. memory is 11.5 GB. [2018-12-02 13:56:04,854 INFO L168 Benchmark]: CDTParser took 0.15 ms. Allocated memory is still 1.0 GB. Free memory is still 982.3 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-02 13:56:04,854 INFO L168 Benchmark]: CACSL2BoogieTranslator took 138.10 ms. Allocated memory is still 1.0 GB. Free memory was 961.4 MB in the beginning and 950.6 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-12-02 13:56:04,854 INFO L168 Benchmark]: Boogie Procedure Inliner took 14.54 ms. Allocated memory is still 1.0 GB. Free memory was 950.6 MB in the beginning and 945.3 MB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. [2018-12-02 13:56:04,854 INFO L168 Benchmark]: Boogie Preprocessor took 51.49 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 128.5 MB). Free memory was 945.3 MB in the beginning and 1.1 GB in the end (delta: -174.5 MB). Peak memory consumption was 13.2 MB. Max. memory is 11.5 GB. [2018-12-02 13:56:04,855 INFO L168 Benchmark]: RCFGBuilder took 198.70 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: 18.4 MB). Peak memory consumption was 18.4 MB. Max. memory is 11.5 GB. [2018-12-02 13:56:04,855 INFO L168 Benchmark]: TraceAbstraction took 7266.23 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 78.1 MB). Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 73.6 MB). Peak memory consumption was 151.7 MB. Max. memory is 11.5 GB. [2018-12-02 13:56:04,855 INFO L168 Benchmark]: Witness Printer took 49.59 ms. Allocated memory is still 1.2 GB. Free memory is still 1.0 GB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-02 13:56:04,857 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15 ms. Allocated memory is still 1.0 GB. Free memory is still 982.3 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 138.10 ms. Allocated memory is still 1.0 GB. Free memory was 961.4 MB in the beginning and 950.6 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 14.54 ms. Allocated memory is still 1.0 GB. Free memory was 950.6 MB in the beginning and 945.3 MB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 51.49 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 128.5 MB). Free memory was 945.3 MB in the beginning and 1.1 GB in the end (delta: -174.5 MB). Peak memory consumption was 13.2 MB. Max. memory is 11.5 GB. * RCFGBuilder took 198.70 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: 18.4 MB). Peak memory consumption was 18.4 MB. Max. memory is 11.5 GB. * TraceAbstraction took 7266.23 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 78.1 MB). Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 73.6 MB). Peak memory consumption was 151.7 MB. Max. memory is 11.5 GB. * Witness Printer took 49.59 ms. Allocated memory is still 1.2 GB. Free memory is still 1.0 GB. There was no memory consumed. 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] struct cont cont; [L23] struct dummy dummy; [L24] struct dummy *dummies[10]; [L25] int a[10]; [L26] int i, *pa; [L27] i = __VERIFIER_nondet_int() [L28] int j = 0; VAL [a={102:0}, cont={72:0}, dummies={56:0}, dummy={101:0}, i=1, j=0] [L28] COND TRUE j < 10 [L29] a[j] = __VERIFIER_nondet_int() [L30] dummies[j] = __VERIFIER_nondet_pointer() [L28] j++ VAL [a={102:0}, cont={72:0}, dummies={56:0}, dummy={101:0}, i=1, j=1] [L28] COND TRUE j < 10 [L29] a[j] = __VERIFIER_nondet_int() [L30] dummies[j] = __VERIFIER_nondet_pointer() [L28] j++ VAL [a={102:0}, cont={72:0}, dummies={56:0}, dummy={101:0}, i=1, j=2] [L28] COND TRUE j < 10 [L29] a[j] = __VERIFIER_nondet_int() [L30] dummies[j] = __VERIFIER_nondet_pointer() [L28] j++ VAL [a={102:0}, cont={72:0}, dummies={56:0}, dummy={101:0}, i=1, j=3] [L28] COND TRUE j < 10 [L29] a[j] = __VERIFIER_nondet_int() [L30] dummies[j] = __VERIFIER_nondet_pointer() [L28] j++ VAL [a={102:0}, cont={72:0}, dummies={56:0}, dummy={101:0}, i=1, j=4] [L28] COND TRUE j < 10 [L29] a[j] = __VERIFIER_nondet_int() [L30] dummies[j] = __VERIFIER_nondet_pointer() [L28] j++ VAL [a={102:0}, cont={72:0}, dummies={56:0}, dummy={101:0}, i=1, j=5] [L28] COND TRUE j < 10 [L29] a[j] = __VERIFIER_nondet_int() [L30] dummies[j] = __VERIFIER_nondet_pointer() [L28] j++ VAL [a={102:0}, cont={72:0}, dummies={56:0}, dummy={101:0}, i=1, j=6] [L28] COND TRUE j < 10 [L29] a[j] = __VERIFIER_nondet_int() [L30] dummies[j] = __VERIFIER_nondet_pointer() [L28] j++ VAL [a={102:0}, cont={72:0}, dummies={56:0}, dummy={101:0}, i=1, j=7] [L28] COND TRUE j < 10 [L29] a[j] = __VERIFIER_nondet_int() [L30] dummies[j] = __VERIFIER_nondet_pointer() [L28] j++ VAL [a={102:0}, cont={72:0}, dummies={56:0}, dummy={101:0}, i=1, j=8] [L28] COND TRUE j < 10 [L29] a[j] = __VERIFIER_nondet_int() [L30] dummies[j] = __VERIFIER_nondet_pointer() [L28] j++ VAL [a={102:0}, cont={72:0}, dummies={56:0}, dummy={101:0}, i=1, j=9] [L28] COND TRUE j < 10 [L29] a[j] = __VERIFIER_nondet_int() [L30] dummies[j] = __VERIFIER_nondet_pointer() [L28] j++ VAL [a={102:0}, cont={72:0}, dummies={56:0}, dummy={101:0}, i=1, j=10] [L28] COND FALSE !(j < 10) VAL [a={102:0}, cont={72:0}, dummies={56:0}, dummy={101:0}, i=1, j=10] [L32] COND TRUE i >= 0 && i < 9 [L33] a[i] = i [L34] dummy.array = &a[i] [L35] dummies[i + 1] = &dummy [L36] cont.array = &dummies[0] [L37] EXPR cont.array [L37] EXPR cont.array[i] [L37] EXPR cont.array[i]->array [L37] pa = &cont.array[i]->array[i] [L38] EXPR a[i] VAL [a={102:0}, a[i]=1, cont={72:0}, dummies={56:0}, dummy={101:0}, i=1, j=10, pa={57:0}] [L38] COND TRUE a[i] > 0 [L39] EXPR dummies[i + 1] [L39] EXPR dummies[i + 1]->array [L39] EXPR dummies[i + 1]->array[i] [L39] i = dummies[i + 1]->array[i] - 10 [L40] EXPR \read(*pa) VAL [\read(*pa)=0, a={102:0}, cont={72:0}, dummies={56:0}, dummy={101:0}, i=0, j=10, pa={57:0}] [L40] COND FALSE !(i < *pa) [L43] CALL, EXPR check(&cont, i) VAL [\old(i)=0, pc={72:0}] [L17] EXPR pc->array [L17] EXPR pc->array[i] [L17] EXPR pc->array[i]->array [L17] EXPR pc->array[i]->array[i] [L17] return pc->array[i]->array[i] == i; [L43] RET, EXPR check(&cont, i) VAL [a={102:0}, check(&cont, i)=0, cont={72:0}, dummies={56:0}, dummy={101:0}, i=0, j=10, pa={57:0}] [L43] COND TRUE !check(&cont, i) [L51] __VERIFIER_error() VAL [a={102:0}, cont={72:0}, dummies={56:0}, dummy={101:0}, i=0, j=10, pa={57:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 25 locations, 1 error locations. UNSAFE Result, 7.2s OverallTime, 12 OverallIterations, 10 TraceHistogramMax, 0.3s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 218 SDtfs, 55 SDslu, 680 SDs, 0 SdLazy, 179 SolverSat, 13 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 320 GetRequests, 256 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=39occurred 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, 9 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 5.7s SatisfiabilityAnalysisTime, 0.5s InterpolantComputationTime, 577 NumberOfCodeBlocks, 577 NumberOfCodeBlocksAsserted, 47 NumberOfCheckSat, 519 ConstructedInterpolants, 0 QuantifiedInterpolants, 25833 SizeOfPredicates, 9 NumberOfNonLiveVariables, 1395 ConjunctsInSsa, 63 ConjunctsInUnsatCore, 20 InterpolantComputations, 2 PerfectInterpolantSequences, 0/570 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...