./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive-simple/id2_b5_o10_true-unreach-call_true-termination_true-no-overflow.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version aa418289 Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_f0ed0b5a-80e5-4ad5-bc8d-e7cef5fa63cc/bin-2019/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_f0ed0b5a-80e5-4ad5-bc8d-e7cef5fa63cc/bin-2019/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_f0ed0b5a-80e5-4ad5-bc8d-e7cef5fa63cc/bin-2019/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_f0ed0b5a-80e5-4ad5-bc8d-e7cef5fa63cc/bin-2019/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive-simple/id2_b5_o10_true-unreach-call_true-termination_true-no-overflow.c -s /tmp/vcloud-vcloud-master/worker/working_dir_f0ed0b5a-80e5-4ad5-bc8d-e7cef5fa63cc/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_f0ed0b5a-80e5-4ad5-bc8d-e7cef5fa63cc/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 6f330f622534898bf170bbd5a7ac37bee3deb574 ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.23-aa41828 [2018-11-23 15:29:47,306 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-23 15:29:47,307 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-23 15:29:47,314 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-23 15:29:47,314 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-23 15:29:47,315 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-23 15:29:47,315 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-23 15:29:47,317 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-23 15:29:47,318 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-23 15:29:47,318 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-23 15:29:47,319 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-23 15:29:47,319 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-23 15:29:47,320 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-23 15:29:47,320 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-23 15:29:47,321 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-23 15:29:47,321 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-23 15:29:47,322 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-23 15:29:47,323 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-23 15:29:47,324 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-23 15:29:47,325 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-23 15:29:47,325 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-23 15:29:47,326 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-23 15:29:47,327 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-23 15:29:47,327 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-23 15:29:47,327 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-23 15:29:47,328 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-23 15:29:47,328 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-23 15:29:47,329 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-23 15:29:47,329 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-23 15:29:47,330 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-23 15:29:47,330 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-23 15:29:47,331 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-23 15:29:47,331 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-23 15:29:47,331 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-23 15:29:47,332 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-23 15:29:47,332 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-23 15:29:47,332 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_f0ed0b5a-80e5-4ad5-bc8d-e7cef5fa63cc/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2018-11-23 15:29:47,340 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-23 15:29:47,340 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-23 15:29:47,340 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-23 15:29:47,340 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-11-23 15:29:47,341 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-11-23 15:29:47,341 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-11-23 15:29:47,341 INFO L133 SettingsManager]: * Use SBE=true [2018-11-23 15:29:47,341 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-23 15:29:47,341 INFO L133 SettingsManager]: * sizeof long=4 [2018-11-23 15:29:47,341 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-23 15:29:47,341 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-11-23 15:29:47,342 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-23 15:29:47,342 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-23 15:29:47,342 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-23 15:29:47,342 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-23 15:29:47,342 INFO L133 SettingsManager]: * sizeof long double=12 [2018-11-23 15:29:47,342 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-23 15:29:47,342 INFO L133 SettingsManager]: * Use constant arrays=true [2018-11-23 15:29:47,342 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-23 15:29:47,342 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-23 15:29:47,343 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-23 15:29:47,343 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-23 15:29:47,343 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-23 15:29:47,343 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-23 15:29:47,343 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-23 15:29:47,343 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-23 15:29:47,343 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-23 15:29:47,343 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-11-23 15:29:47,343 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-23 15:29:47,344 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-23 15:29:47,344 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_f0ed0b5a-80e5-4ad5-bc8d-e7cef5fa63cc/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 -> 6f330f622534898bf170bbd5a7ac37bee3deb574 [2018-11-23 15:29:47,365 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-23 15:29:47,372 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-23 15:29:47,374 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-23 15:29:47,375 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-23 15:29:47,375 INFO L276 PluginConnector]: CDTParser initialized [2018-11-23 15:29:47,376 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_f0ed0b5a-80e5-4ad5-bc8d-e7cef5fa63cc/bin-2019/uautomizer/../../sv-benchmarks/c/recursive-simple/id2_b5_o10_true-unreach-call_true-termination_true-no-overflow.c [2018-11-23 15:29:47,410 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_f0ed0b5a-80e5-4ad5-bc8d-e7cef5fa63cc/bin-2019/uautomizer/data/ee2f20a76/2aa1040fd1b748e297052d0101af2e8a/FLAG05a40cbe3 [2018-11-23 15:29:47,806 INFO L307 CDTParser]: Found 1 translation units. [2018-11-23 15:29:47,806 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_f0ed0b5a-80e5-4ad5-bc8d-e7cef5fa63cc/sv-benchmarks/c/recursive-simple/id2_b5_o10_true-unreach-call_true-termination_true-no-overflow.c [2018-11-23 15:29:47,810 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_f0ed0b5a-80e5-4ad5-bc8d-e7cef5fa63cc/bin-2019/uautomizer/data/ee2f20a76/2aa1040fd1b748e297052d0101af2e8a/FLAG05a40cbe3 [2018-11-23 15:29:47,819 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_f0ed0b5a-80e5-4ad5-bc8d-e7cef5fa63cc/bin-2019/uautomizer/data/ee2f20a76/2aa1040fd1b748e297052d0101af2e8a [2018-11-23 15:29:47,821 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-23 15:29:47,821 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-11-23 15:29:47,822 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-23 15:29:47,822 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-23 15:29:47,825 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-23 15:29:47,826 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:29:47" (1/1) ... [2018-11-23 15:29:47,828 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@33c486bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:29:47, skipping insertion in model container [2018-11-23 15:29:47,828 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:29:47" (1/1) ... [2018-11-23 15:29:47,834 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-23 15:29:47,844 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-11-23 15:29:47,958 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-23 15:29:47,961 INFO L191 MainTranslator]: Completed pre-run [2018-11-23 15:29:47,971 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-23 15:29:47,980 INFO L195 MainTranslator]: Completed translation [2018-11-23 15:29:47,980 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:29:47 WrapperNode [2018-11-23 15:29:47,980 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-23 15:29:47,980 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-23 15:29:47,981 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-23 15:29:47,981 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-23 15:29:47,986 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:29:47" (1/1) ... [2018-11-23 15:29:47,989 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:29:47" (1/1) ... [2018-11-23 15:29:47,993 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-23 15:29:47,993 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-23 15:29:47,993 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-23 15:29:47,993 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-23 15:29:47,998 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:29:47" (1/1) ... [2018-11-23 15:29:47,998 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:29:47" (1/1) ... [2018-11-23 15:29:47,999 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:29:47" (1/1) ... [2018-11-23 15:29:47,999 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:29:47" (1/1) ... [2018-11-23 15:29:48,001 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:29:47" (1/1) ... [2018-11-23 15:29:48,002 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:29:47" (1/1) ... [2018-11-23 15:29:48,003 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:29:47" (1/1) ... [2018-11-23 15:29:48,004 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-23 15:29:48,004 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-23 15:29:48,004 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-23 15:29:48,004 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-23 15:29:48,005 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:29:47" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f0ed0b5a-80e5-4ad5-bc8d-e7cef5fa63cc/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 [2018-11-23 15:29:48,088 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-23 15:29:48,088 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-23 15:29:48,089 INFO L130 BoogieDeclarations]: Found specification of procedure id2 [2018-11-23 15:29:48,089 INFO L138 BoogieDeclarations]: Found implementation of procedure id2 [2018-11-23 15:29:48,089 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-23 15:29:48,089 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-23 15:29:48,089 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-23 15:29:48,089 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-23 15:29:48,089 INFO L130 BoogieDeclarations]: Found specification of procedure id [2018-11-23 15:29:48,089 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2018-11-23 15:29:48,215 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-23 15:29:48,215 INFO L280 CfgBuilder]: Removed 0 assue(true) statements. [2018-11-23 15:29:48,215 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:29:48 BoogieIcfgContainer [2018-11-23 15:29:48,215 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-23 15:29:48,216 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-23 15:29:48,216 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-23 15:29:48,218 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-23 15:29:48,218 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 03:29:47" (1/3) ... [2018-11-23 15:29:48,219 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7bb92667 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:29:48, skipping insertion in model container [2018-11-23 15:29:48,219 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:29:47" (2/3) ... [2018-11-23 15:29:48,219 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7bb92667 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:29:48, skipping insertion in model container [2018-11-23 15:29:48,219 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:29:48" (3/3) ... [2018-11-23 15:29:48,221 INFO L112 eAbstractionObserver]: Analyzing ICFG id2_b5_o10_true-unreach-call_true-termination_true-no-overflow.c [2018-11-23 15:29:48,230 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-23 15:29:48,236 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-23 15:29:48,252 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-23 15:29:48,278 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-11-23 15:29:48,278 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-23 15:29:48,278 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-23 15:29:48,279 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-23 15:29:48,279 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-23 15:29:48,279 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-23 15:29:48,279 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-23 15:29:48,279 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-23 15:29:48,279 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-23 15:29:48,294 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states. [2018-11-23 15:29:48,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-11-23 15:29:48,298 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 15:29:48,298 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 15:29:48,300 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 15:29:48,303 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 15:29:48,304 INFO L82 PathProgramCache]: Analyzing trace with hash 128923731, now seen corresponding path program 1 times [2018-11-23 15:29:48,305 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 15:29:48,305 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 15:29:48,347 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 15:29:48,347 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 15:29:48,347 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 15:29:48,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 15:29:48,476 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 15:29:48,478 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-23 15:29:48,478 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-23 15:29:48,481 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-23 15:29:48,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-23 15:29:48,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-23 15:29:48,490 INFO L87 Difference]: Start difference. First operand 28 states. Second operand 5 states. [2018-11-23 15:29:48,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 15:29:48,525 INFO L93 Difference]: Finished difference Result 40 states and 46 transitions. [2018-11-23 15:29:48,525 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-23 15:29:48,526 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2018-11-23 15:29:48,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 15:29:48,533 INFO L225 Difference]: With dead ends: 40 [2018-11-23 15:29:48,533 INFO L226 Difference]: Without dead ends: 26 [2018-11-23 15:29:48,535 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-23 15:29:48,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-11-23 15:29:48,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2018-11-23 15:29:48,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-11-23 15:29:48,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2018-11-23 15:29:48,563 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 13 [2018-11-23 15:29:48,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 15:29:48,564 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2018-11-23 15:29:48,564 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-23 15:29:48,564 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2018-11-23 15:29:48,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-11-23 15:29:48,565 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 15:29:48,565 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] [2018-11-23 15:29:48,565 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 15:29:48,566 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 15:29:48,566 INFO L82 PathProgramCache]: Analyzing trace with hash 1945633833, now seen corresponding path program 1 times [2018-11-23 15:29:48,566 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 15:29:48,566 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 15:29:48,567 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 15:29:48,567 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 15:29:48,567 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 15:29:48,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 15:29:48,644 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 15:29:48,644 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-23 15:29:48,645 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-23 15:29:48,646 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-23 15:29:48,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-23 15:29:48,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-23 15:29:48,647 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand 5 states. [2018-11-23 15:29:48,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 15:29:48,670 INFO L93 Difference]: Finished difference Result 44 states and 52 transitions. [2018-11-23 15:29:48,671 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-23 15:29:48,671 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2018-11-23 15:29:48,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 15:29:48,671 INFO L225 Difference]: With dead ends: 44 [2018-11-23 15:29:48,671 INFO L226 Difference]: Without dead ends: 32 [2018-11-23 15:29:48,672 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-23 15:29:48,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-11-23 15:29:48,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2018-11-23 15:29:48,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-11-23 15:29:48,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2018-11-23 15:29:48,678 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 20 [2018-11-23 15:29:48,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 15:29:48,678 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2018-11-23 15:29:48,678 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-23 15:29:48,678 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2018-11-23 15:29:48,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-11-23 15:29:48,679 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 15:29:48,679 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] [2018-11-23 15:29:48,679 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 15:29:48,679 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 15:29:48,679 INFO L82 PathProgramCache]: Analyzing trace with hash 1974262984, now seen corresponding path program 1 times [2018-11-23 15:29:48,679 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 15:29:48,679 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 15:29:48,680 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 15:29:48,680 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 15:29:48,680 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 15:29:48,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 15:29:48,790 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 15:29:48,790 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-23 15:29:48,790 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2018-11-23 15:29:48,791 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-11-23 15:29:48,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-11-23 15:29:48,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2018-11-23 15:29:48,791 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand 8 states. [2018-11-23 15:29:48,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 15:29:48,830 INFO L93 Difference]: Finished difference Result 36 states and 40 transitions. [2018-11-23 15:29:48,830 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-11-23 15:29:48,830 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 20 [2018-11-23 15:29:48,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 15:29:48,831 INFO L225 Difference]: With dead ends: 36 [2018-11-23 15:29:48,831 INFO L226 Difference]: Without dead ends: 32 [2018-11-23 15:29:48,832 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2018-11-23 15:29:48,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-11-23 15:29:48,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2018-11-23 15:29:48,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-11-23 15:29:48,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2018-11-23 15:29:48,836 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 20 [2018-11-23 15:29:48,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 15:29:48,837 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2018-11-23 15:29:48,837 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-11-23 15:29:48,837 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2018-11-23 15:29:48,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-11-23 15:29:48,837 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 15:29:48,838 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, 1, 1, 1, 1, 1] [2018-11-23 15:29:48,838 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 15:29:48,838 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 15:29:48,838 INFO L82 PathProgramCache]: Analyzing trace with hash 1423155149, now seen corresponding path program 1 times [2018-11-23 15:29:48,838 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 15:29:48,838 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 15:29:48,839 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 15:29:48,839 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 15:29:48,839 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 15:29:48,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 15:29:48,897 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-11-23 15:29:48,898 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-23 15:29:48,898 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-23 15:29:48,898 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-23 15:29:48,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-23 15:29:48,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-23 15:29:48,898 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand 5 states. [2018-11-23 15:29:48,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 15:29:48,913 INFO L93 Difference]: Finished difference Result 48 states and 55 transitions. [2018-11-23 15:29:48,914 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-23 15:29:48,914 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 27 [2018-11-23 15:29:48,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 15:29:48,915 INFO L225 Difference]: With dead ends: 48 [2018-11-23 15:29:48,915 INFO L226 Difference]: Without dead ends: 36 [2018-11-23 15:29:48,915 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-23 15:29:48,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-11-23 15:29:48,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 34. [2018-11-23 15:29:48,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-11-23 15:29:48,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2018-11-23 15:29:48,920 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 27 [2018-11-23 15:29:48,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 15:29:48,921 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2018-11-23 15:29:48,921 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-23 15:29:48,921 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2018-11-23 15:29:48,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-11-23 15:29:48,921 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 15:29:48,922 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, 1, 1, 1, 1, 1] [2018-11-23 15:29:48,922 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 15:29:48,922 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 15:29:48,922 INFO L82 PathProgramCache]: Analyzing trace with hash 1226641644, now seen corresponding path program 1 times [2018-11-23 15:29:48,922 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 15:29:48,922 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 15:29:48,923 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 15:29:48,923 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 15:29:48,923 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 15:29:48,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 15:29:48,991 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-11-23 15:29:48,991 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-23 15:29:48,991 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-23 15:29:48,991 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-23 15:29:48,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-23 15:29:48,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-23 15:29:48,992 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand 5 states. [2018-11-23 15:29:49,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 15:29:49,003 INFO L93 Difference]: Finished difference Result 40 states and 44 transitions. [2018-11-23 15:29:49,003 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-23 15:29:49,003 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 27 [2018-11-23 15:29:49,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 15:29:49,004 INFO L225 Difference]: With dead ends: 40 [2018-11-23 15:29:49,004 INFO L226 Difference]: Without dead ends: 36 [2018-11-23 15:29:49,004 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-23 15:29:49,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-11-23 15:29:49,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 34. [2018-11-23 15:29:49,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-11-23 15:29:49,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2018-11-23 15:29:49,008 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 27 [2018-11-23 15:29:49,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 15:29:49,008 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2018-11-23 15:29:49,008 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-23 15:29:49,008 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2018-11-23 15:29:49,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-11-23 15:29:49,009 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 15:29:49,009 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, 1, 1, 1, 1, 1] [2018-11-23 15:29:49,009 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 15:29:49,010 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 15:29:49,010 INFO L82 PathProgramCache]: Analyzing trace with hash 1255270795, now seen corresponding path program 1 times [2018-11-23 15:29:49,010 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 15:29:49,010 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 15:29:49,011 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 15:29:49,011 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 15:29:49,011 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 15:29:49,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 15:29:49,172 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-11-23 15:29:49,173 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 15:29:49,173 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f0ed0b5a-80e5-4ad5-bc8d-e7cef5fa63cc/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 [2018-11-23 15:29:49,191 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 15:29:49,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 15:29:49,222 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 15:29:49,298 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-11-23 15:29:49,314 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 15:29:49,315 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2018-11-23 15:29:49,315 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-11-23 15:29:49,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-11-23 15:29:49,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2018-11-23 15:29:49,316 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand 12 states. [2018-11-23 15:29:49,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 15:29:49,391 INFO L93 Difference]: Finished difference Result 56 states and 64 transitions. [2018-11-23 15:29:49,392 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-11-23 15:29:49,392 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 27 [2018-11-23 15:29:49,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 15:29:49,393 INFO L225 Difference]: With dead ends: 56 [2018-11-23 15:29:49,393 INFO L226 Difference]: Without dead ends: 40 [2018-11-23 15:29:49,393 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2018-11-23 15:29:49,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2018-11-23 15:29:49,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 34. [2018-11-23 15:29:49,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-11-23 15:29:49,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2018-11-23 15:29:49,398 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 27 [2018-11-23 15:29:49,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 15:29:49,398 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2018-11-23 15:29:49,398 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-11-23 15:29:49,398 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2018-11-23 15:29:49,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-11-23 15:29:49,399 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 15:29:49,399 INFO L402 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 15:29:49,399 INFO L423 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 15:29:49,400 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 15:29:49,400 INFO L82 PathProgramCache]: Analyzing trace with hash 906172561, now seen corresponding path program 1 times [2018-11-23 15:29:49,400 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 15:29:49,400 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 15:29:49,401 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 15:29:49,401 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 15:29:49,401 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 15:29:49,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 15:29:49,467 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-11-23 15:29:49,467 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-23 15:29:49,467 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-23 15:29:49,468 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-23 15:29:49,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-23 15:29:49,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-23 15:29:49,468 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand 5 states. [2018-11-23 15:29:49,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 15:29:49,490 INFO L93 Difference]: Finished difference Result 54 states and 61 transitions. [2018-11-23 15:29:49,492 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-23 15:29:49,492 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 34 [2018-11-23 15:29:49,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 15:29:49,493 INFO L225 Difference]: With dead ends: 54 [2018-11-23 15:29:49,493 INFO L226 Difference]: Without dead ends: 40 [2018-11-23 15:29:49,493 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-23 15:29:49,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2018-11-23 15:29:49,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 38. [2018-11-23 15:29:49,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-11-23 15:29:49,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2018-11-23 15:29:49,497 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 34 [2018-11-23 15:29:49,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 15:29:49,498 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2018-11-23 15:29:49,498 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-23 15:29:49,498 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2018-11-23 15:29:49,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-11-23 15:29:49,499 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 15:29:49,499 INFO L402 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 15:29:49,499 INFO L423 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 15:29:49,499 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 15:29:49,499 INFO L82 PathProgramCache]: Analyzing trace with hash 709659056, now seen corresponding path program 1 times [2018-11-23 15:29:49,499 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 15:29:49,500 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 15:29:49,500 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 15:29:49,500 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 15:29:49,500 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 15:29:49,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 15:29:49,659 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-11-23 15:29:49,659 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 15:29:49,659 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f0ed0b5a-80e5-4ad5-bc8d-e7cef5fa63cc/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 [2018-11-23 15:29:49,665 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 15:29:49,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 15:29:49,676 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 15:29:49,720 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-11-23 15:29:49,735 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 15:29:49,736 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2018-11-23 15:29:49,736 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-11-23 15:29:49,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-11-23 15:29:49,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=182, Unknown=0, NotChecked=0, Total=210 [2018-11-23 15:29:49,737 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand 15 states. [2018-11-23 15:29:49,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 15:29:49,853 INFO L93 Difference]: Finished difference Result 72 states and 81 transitions. [2018-11-23 15:29:49,853 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-11-23 15:29:49,853 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 34 [2018-11-23 15:29:49,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 15:29:49,854 INFO L225 Difference]: With dead ends: 72 [2018-11-23 15:29:49,854 INFO L226 Difference]: Without dead ends: 52 [2018-11-23 15:29:49,855 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2018-11-23 15:29:49,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2018-11-23 15:29:49,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 42. [2018-11-23 15:29:49,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-11-23 15:29:49,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 46 transitions. [2018-11-23 15:29:49,860 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 46 transitions. Word has length 34 [2018-11-23 15:29:49,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 15:29:49,860 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 46 transitions. [2018-11-23 15:29:49,860 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-11-23 15:29:49,860 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 46 transitions. [2018-11-23 15:29:49,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-11-23 15:29:49,861 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 15:29:49,861 INFO L402 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 15:29:49,865 INFO L423 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 15:29:49,865 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 15:29:49,866 INFO L82 PathProgramCache]: Analyzing trace with hash -797786941, now seen corresponding path program 2 times [2018-11-23 15:29:49,866 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 15:29:49,866 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 15:29:49,866 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 15:29:49,867 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 15:29:49,867 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 15:29:49,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 15:29:50,077 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-11-23 15:29:50,077 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 15:29:50,077 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f0ed0b5a-80e5-4ad5-bc8d-e7cef5fa63cc/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 [2018-11-23 15:29:50,092 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-23 15:29:50,104 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-23 15:29:50,105 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 15:29:50,107 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 15:29:50,151 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-11-23 15:29:50,166 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 15:29:50,166 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2018-11-23 15:29:50,167 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-11-23 15:29:50,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-11-23 15:29:50,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=272, Unknown=0, NotChecked=0, Total=306 [2018-11-23 15:29:50,167 INFO L87 Difference]: Start difference. First operand 42 states and 46 transitions. Second operand 18 states. [2018-11-23 15:29:50,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 15:29:50,259 INFO L93 Difference]: Finished difference Result 80 states and 89 transitions. [2018-11-23 15:29:50,259 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-11-23 15:29:50,259 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 41 [2018-11-23 15:29:50,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 15:29:50,260 INFO L225 Difference]: With dead ends: 80 [2018-11-23 15:29:50,260 INFO L226 Difference]: Without dead ends: 60 [2018-11-23 15:29:50,261 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=50, Invalid=412, Unknown=0, NotChecked=0, Total=462 [2018-11-23 15:29:50,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2018-11-23 15:29:50,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 46. [2018-11-23 15:29:50,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2018-11-23 15:29:50,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 50 transitions. [2018-11-23 15:29:50,265 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 50 transitions. Word has length 41 [2018-11-23 15:29:50,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 15:29:50,266 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 50 transitions. [2018-11-23 15:29:50,267 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-11-23 15:29:50,267 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 50 transitions. [2018-11-23 15:29:50,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-11-23 15:29:50,268 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 15:29:50,268 INFO L402 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 15:29:50,268 INFO L423 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 15:29:50,268 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 15:29:50,268 INFO L82 PathProgramCache]: Analyzing trace with hash 1496626328, now seen corresponding path program 2 times [2018-11-23 15:29:50,268 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 15:29:50,268 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 15:29:50,269 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 15:29:50,269 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 15:29:50,269 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 15:29:50,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 15:29:50,515 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2018-11-23 15:29:50,515 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 15:29:50,515 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f0ed0b5a-80e5-4ad5-bc8d-e7cef5fa63cc/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 [2018-11-23 15:29:50,522 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-23 15:29:50,528 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2018-11-23 15:29:50,528 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 15:29:50,530 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 15:29:50,594 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2018-11-23 15:29:50,613 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-23 15:29:50,613 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [20] total 23 [2018-11-23 15:29:50,613 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-11-23 15:29:50,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-11-23 15:29:50,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=458, Unknown=0, NotChecked=0, Total=506 [2018-11-23 15:29:50,614 INFO L87 Difference]: Start difference. First operand 46 states and 50 transitions. Second operand 23 states. [2018-11-23 15:29:50,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 15:29:50,755 INFO L93 Difference]: Finished difference Result 88 states and 98 transitions. [2018-11-23 15:29:50,755 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-11-23 15:29:50,755 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 48 [2018-11-23 15:29:50,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 15:29:50,756 INFO L225 Difference]: With dead ends: 88 [2018-11-23 15:29:50,756 INFO L226 Difference]: Without dead ends: 0 [2018-11-23 15:29:50,756 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=71, Invalid=685, Unknown=0, NotChecked=0, Total=756 [2018-11-23 15:29:50,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-11-23 15:29:50,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-11-23 15:29:50,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-11-23 15:29:50,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-11-23 15:29:50,757 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 48 [2018-11-23 15:29:50,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 15:29:50,757 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-11-23 15:29:50,757 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-11-23 15:29:50,757 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-11-23 15:29:50,758 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-11-23 15:29:50,760 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-11-23 15:29:50,769 INFO L451 ceAbstractionStarter]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2018-11-23 15:29:50,769 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2018-11-23 15:29:50,769 INFO L448 ceAbstractionStarter]: For program point L17(line 17) no Hoare annotation was computed. [2018-11-23 15:29:50,769 INFO L451 ceAbstractionStarter]: At program point L16(line 16) the Hoare annotation is: true [2018-11-23 15:29:50,769 INFO L448 ceAbstractionStarter]: For program point L15(line 15) no Hoare annotation was computed. [2018-11-23 15:29:50,769 INFO L448 ceAbstractionStarter]: For program point L16-1(line 16) no Hoare annotation was computed. [2018-11-23 15:29:50,769 INFO L448 ceAbstractionStarter]: For program point id2EXIT(lines 14 19) no Hoare annotation was computed. [2018-11-23 15:29:50,769 INFO L451 ceAbstractionStarter]: At program point id2ENTRY(lines 14 19) the Hoare annotation is: true [2018-11-23 15:29:50,769 INFO L448 ceAbstractionStarter]: For program point id2FINAL(lines 14 19) no Hoare annotation was computed. [2018-11-23 15:29:50,769 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2018-11-23 15:29:50,769 INFO L451 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2018-11-23 15:29:50,770 INFO L451 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2018-11-23 15:29:50,770 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2018-11-23 15:29:50,770 INFO L451 ceAbstractionStarter]: At program point mainENTRY(lines 21 27) the Hoare annotation is: true [2018-11-23 15:29:50,770 INFO L448 ceAbstractionStarter]: For program point L25(line 25) no Hoare annotation was computed. [2018-11-23 15:29:50,770 INFO L448 ceAbstractionStarter]: For program point mainEXIT(lines 21 27) no Hoare annotation was computed. [2018-11-23 15:29:50,770 INFO L448 ceAbstractionStarter]: For program point L24(lines 24 26) no Hoare annotation was computed. [2018-11-23 15:29:50,770 INFO L451 ceAbstractionStarter]: At program point L23(line 23) the Hoare annotation is: true [2018-11-23 15:29:50,770 INFO L448 ceAbstractionStarter]: For program point L23-1(line 23) no Hoare annotation was computed. [2018-11-23 15:29:50,770 INFO L448 ceAbstractionStarter]: For program point L24-2(lines 21 27) no Hoare annotation was computed. [2018-11-23 15:29:50,770 INFO L448 ceAbstractionStarter]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 25) no Hoare annotation was computed. [2018-11-23 15:29:50,770 INFO L448 ceAbstractionStarter]: For program point idFINAL(lines 7 12) no Hoare annotation was computed. [2018-11-23 15:29:50,770 INFO L448 ceAbstractionStarter]: For program point idEXIT(lines 7 12) no Hoare annotation was computed. [2018-11-23 15:29:50,770 INFO L448 ceAbstractionStarter]: For program point L10(line 10) no Hoare annotation was computed. [2018-11-23 15:29:50,770 INFO L451 ceAbstractionStarter]: At program point L9(line 9) the Hoare annotation is: true [2018-11-23 15:29:50,770 INFO L448 ceAbstractionStarter]: For program point L8(line 8) no Hoare annotation was computed. [2018-11-23 15:29:50,770 INFO L448 ceAbstractionStarter]: For program point L9-1(line 9) no Hoare annotation was computed. [2018-11-23 15:29:50,770 INFO L451 ceAbstractionStarter]: At program point idENTRY(lines 7 12) the Hoare annotation is: true [2018-11-23 15:29:50,772 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.11 03:29:50 BoogieIcfgContainer [2018-11-23 15:29:50,772 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-23 15:29:50,772 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-11-23 15:29:50,772 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-11-23 15:29:50,772 INFO L276 PluginConnector]: Witness Printer initialized [2018-11-23 15:29:50,773 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:29:48" (3/4) ... [2018-11-23 15:29:50,775 INFO L144 WitnessPrinter]: Generating witness for correct program [2018-11-23 15:29:50,779 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2018-11-23 15:29:50,779 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure id2 [2018-11-23 15:29:50,780 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2018-11-23 15:29:50,780 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure id [2018-11-23 15:29:50,783 INFO L879 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2018-11-23 15:29:50,783 INFO L879 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2018-11-23 15:29:50,783 INFO L879 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2018-11-23 15:29:50,813 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_f0ed0b5a-80e5-4ad5-bc8d-e7cef5fa63cc/bin-2019/uautomizer/witness.graphml [2018-11-23 15:29:50,813 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-11-23 15:29:50,814 INFO L168 Benchmark]: Toolchain (without parser) took 2992.78 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 129.5 MB). Free memory was 959.3 MB in the beginning and 952.3 MB in the end (delta: 6.9 MB). Peak memory consumption was 136.4 MB. Max. memory is 11.5 GB. [2018-11-23 15:29:50,815 INFO L168 Benchmark]: CDTParser took 0.10 ms. Allocated memory is still 1.0 GB. Free memory is still 985.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-23 15:29:50,815 INFO L168 Benchmark]: CACSL2BoogieTranslator took 158.19 ms. Allocated memory is still 1.0 GB. Free memory was 959.3 MB in the beginning and 948.5 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-11-23 15:29:50,815 INFO L168 Benchmark]: Boogie Procedure Inliner took 12.38 ms. Allocated memory is still 1.0 GB. Free memory was 948.5 MB in the beginning and 945.8 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. [2018-11-23 15:29:50,816 INFO L168 Benchmark]: Boogie Preprocessor took 10.75 ms. Allocated memory is still 1.0 GB. Free memory is still 945.8 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-23 15:29:50,816 INFO L168 Benchmark]: RCFGBuilder took 211.45 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 129.5 MB). Free memory was 945.8 MB in the beginning and 1.1 GB in the end (delta: -169.4 MB). Peak memory consumption was 14.6 MB. Max. memory is 11.5 GB. [2018-11-23 15:29:50,816 INFO L168 Benchmark]: TraceAbstraction took 2556.34 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 952.3 MB in the end (delta: 162.9 MB). Peak memory consumption was 162.9 MB. Max. memory is 11.5 GB. [2018-11-23 15:29:50,816 INFO L168 Benchmark]: Witness Printer took 40.91 ms. Allocated memory is still 1.2 GB. Free memory is still 952.3 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-23 15:29:50,818 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10 ms. Allocated memory is still 1.0 GB. Free memory is still 985.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 158.19 ms. Allocated memory is still 1.0 GB. Free memory was 959.3 MB in the beginning and 948.5 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 12.38 ms. Allocated memory is still 1.0 GB. Free memory was 948.5 MB in the beginning and 945.8 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 10.75 ms. Allocated memory is still 1.0 GB. Free memory is still 945.8 MB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 211.45 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 129.5 MB). Free memory was 945.8 MB in the beginning and 1.1 GB in the end (delta: -169.4 MB). Peak memory consumption was 14.6 MB. Max. memory is 11.5 GB. * TraceAbstraction took 2556.34 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 952.3 MB in the end (delta: 162.9 MB). Peak memory consumption was 162.9 MB. Max. memory is 11.5 GB. * Witness Printer took 40.91 ms. Allocated memory is still 1.2 GB. Free memory is still 952.3 MB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 25]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 28 locations, 1 error locations. SAFE Result, 2.5s OverallTime, 10 OverallIterations, 3 TraceHistogramMax, 0.6s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 304 SDtfs, 38 SDslu, 2371 SDs, 0 SdLazy, 707 SolverSat, 9 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 256 GetRequests, 154 SyntacticMatches, 6 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 1.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=46occurred in iteration=9, 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, 10 MinimizatonAttempts, 40 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 9 LocationsWithAnnotation, 11 PreInvPairs, 11 NumberOfFragments, 9 HoareAnnotationTreeSize, 11 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 9 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.4s InterpolantComputationTime, 441 NumberOfCodeBlocks, 413 NumberOfCodeBlocksAsserted, 15 NumberOfCheckSat, 427 ConstructedInterpolants, 0 QuantifiedInterpolants, 46409 SizeOfPredicates, 14 NumberOfNonLiveVariables, 270 ConjunctsInSsa, 86 ConjunctsInUnsatCore, 14 InterpolantComputations, 7 PerfectInterpolantSequences, 105/165 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...