./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive-simple/sum_20x0-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cad46833 Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_6b405c84-5f7a-488b-b013-ae4621692c18/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_6b405c84-5f7a-488b-b013-ae4621692c18/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_6b405c84-5f7a-488b-b013-ae4621692c18/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_6b405c84-5f7a-488b-b013-ae4621692c18/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive-simple/sum_20x0-1.c -s /tmp/vcloud-vcloud-master/worker/working_dir_6b405c84-5f7a-488b-b013-ae4621692c18/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_6b405c84-5f7a-488b-b013-ae4621692c18/bin/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 17db2a72807ac377d533a347dbb668103ea580a0 ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 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 0.1.24-cad4683 [2019-10-22 09:01:24,194 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-22 09:01:24,196 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-22 09:01:24,205 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-22 09:01:24,205 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-22 09:01:24,206 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-22 09:01:24,207 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-22 09:01:24,209 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-22 09:01:24,210 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-22 09:01:24,211 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-22 09:01:24,212 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-22 09:01:24,213 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-22 09:01:24,213 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-22 09:01:24,214 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-22 09:01:24,215 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-22 09:01:24,216 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-22 09:01:24,216 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-22 09:01:24,217 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-22 09:01:24,218 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-22 09:01:24,220 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-22 09:01:24,221 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-22 09:01:24,222 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-22 09:01:24,223 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-22 09:01:24,224 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-22 09:01:24,226 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-22 09:01:24,226 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-22 09:01:24,226 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-22 09:01:24,227 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-22 09:01:24,227 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-22 09:01:24,228 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-22 09:01:24,229 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-22 09:01:24,229 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-22 09:01:24,230 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-22 09:01:24,230 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-22 09:01:24,232 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-22 09:01:24,232 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-22 09:01:24,232 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-22 09:01:24,233 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-22 09:01:24,233 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-22 09:01:24,234 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-22 09:01:24,234 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-22 09:01:24,235 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_6b405c84-5f7a-488b-b013-ae4621692c18/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-22 09:01:24,250 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-22 09:01:24,250 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-22 09:01:24,251 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-22 09:01:24,252 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-22 09:01:24,252 INFO L138 SettingsManager]: * Use SBE=true [2019-10-22 09:01:24,252 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-22 09:01:24,252 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-22 09:01:24,252 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-22 09:01:24,253 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-22 09:01:24,253 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-22 09:01:24,253 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-22 09:01:24,253 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-22 09:01:24,253 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-22 09:01:24,254 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-22 09:01:24,254 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-22 09:01:24,254 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-22 09:01:24,254 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-22 09:01:24,257 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-22 09:01:24,257 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-22 09:01:24,257 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-22 09:01:24,258 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-22 09:01:24,258 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-22 09:01:24,258 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-22 09:01:24,258 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-22 09:01:24,258 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-22 09:01:24,258 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-22 09:01:24,259 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-22 09:01:24,259 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-22 09:01:24,259 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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_6b405c84-5f7a-488b-b013-ae4621692c18/bin/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 -> 17db2a72807ac377d533a347dbb668103ea580a0 [2019-10-22 09:01:24,297 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-22 09:01:24,309 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-22 09:01:24,312 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-22 09:01:24,314 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-22 09:01:24,314 INFO L275 PluginConnector]: CDTParser initialized [2019-10-22 09:01:24,314 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_6b405c84-5f7a-488b-b013-ae4621692c18/bin/uautomizer/../../sv-benchmarks/c/recursive-simple/sum_20x0-1.c [2019-10-22 09:01:24,372 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_6b405c84-5f7a-488b-b013-ae4621692c18/bin/uautomizer/data/8fadf0405/25dc3b0d10054869844b2e9b473d9935/FLAGcef6e1ec5 [2019-10-22 09:01:24,722 INFO L306 CDTParser]: Found 1 translation units. [2019-10-22 09:01:24,723 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_6b405c84-5f7a-488b-b013-ae4621692c18/sv-benchmarks/c/recursive-simple/sum_20x0-1.c [2019-10-22 09:01:24,728 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_6b405c84-5f7a-488b-b013-ae4621692c18/bin/uautomizer/data/8fadf0405/25dc3b0d10054869844b2e9b473d9935/FLAGcef6e1ec5 [2019-10-22 09:01:25,125 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_6b405c84-5f7a-488b-b013-ae4621692c18/bin/uautomizer/data/8fadf0405/25dc3b0d10054869844b2e9b473d9935 [2019-10-22 09:01:25,130 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-22 09:01:25,131 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-10-22 09:01:25,132 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-22 09:01:25,132 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-22 09:01:25,135 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-22 09:01:25,135 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 09:01:25" (1/1) ... [2019-10-22 09:01:25,137 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6c328f5b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:01:25, skipping insertion in model container [2019-10-22 09:01:25,138 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 09:01:25" (1/1) ... [2019-10-22 09:01:25,144 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-22 09:01:25,161 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-22 09:01:25,295 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-22 09:01:25,299 INFO L188 MainTranslator]: Completed pre-run [2019-10-22 09:01:25,366 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-22 09:01:25,378 INFO L192 MainTranslator]: Completed translation [2019-10-22 09:01:25,378 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:01:25 WrapperNode [2019-10-22 09:01:25,378 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-22 09:01:25,379 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-10-22 09:01:25,379 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-10-22 09:01:25,379 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-10-22 09:01:25,387 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:01:25" (1/1) ... [2019-10-22 09:01:25,391 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:01:25" (1/1) ... [2019-10-22 09:01:25,406 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-10-22 09:01:25,406 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-22 09:01:25,406 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-22 09:01:25,406 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-22 09:01:25,412 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:01:25" (1/1) ... [2019-10-22 09:01:25,412 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:01:25" (1/1) ... [2019-10-22 09:01:25,413 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:01:25" (1/1) ... [2019-10-22 09:01:25,413 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:01:25" (1/1) ... [2019-10-22 09:01:25,414 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:01:25" (1/1) ... [2019-10-22 09:01:25,415 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:01:25" (1/1) ... [2019-10-22 09:01:25,415 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:01:25" (1/1) ... [2019-10-22 09:01:25,416 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-22 09:01:25,417 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-22 09:01:25,417 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-22 09:01:25,417 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-22 09:01:25,418 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:01:25" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6b405c84-5f7a-488b-b013-ae4621692c18/bin/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 [2019-10-22 09:01:25,474 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-22 09:01:25,474 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-22 09:01:25,474 INFO L130 BoogieDeclarations]: Found specification of procedure sum [2019-10-22 09:01:25,475 INFO L138 BoogieDeclarations]: Found implementation of procedure sum [2019-10-22 09:01:25,589 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-22 09:01:25,590 INFO L284 CfgBuilder]: Removed 4 assume(true) statements. [2019-10-22 09:01:25,591 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 09:01:25 BoogieIcfgContainer [2019-10-22 09:01:25,591 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-22 09:01:25,592 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-22 09:01:25,592 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-22 09:01:25,595 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-22 09:01:25,595 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.10 09:01:25" (1/3) ... [2019-10-22 09:01:25,596 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26829cb6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 09:01:25, skipping insertion in model container [2019-10-22 09:01:25,596 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:01:25" (2/3) ... [2019-10-22 09:01:25,596 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26829cb6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 09:01:25, skipping insertion in model container [2019-10-22 09:01:25,597 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 09:01:25" (3/3) ... [2019-10-22 09:01:25,600 INFO L109 eAbstractionObserver]: Analyzing ICFG sum_20x0-1.c [2019-10-22 09:01:25,607 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-22 09:01:25,613 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-22 09:01:25,622 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-22 09:01:25,639 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-22 09:01:25,639 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-22 09:01:25,639 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-22 09:01:25,639 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-22 09:01:25,639 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-22 09:01:25,639 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-22 09:01:25,640 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-22 09:01:25,640 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-22 09:01:25,654 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states. [2019-10-22 09:01:25,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-10-22 09:01:25,658 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:01:25,659 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 09:01:25,660 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 09:01:25,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:01:25,664 INFO L82 PathProgramCache]: Analyzing trace with hash 389977641, now seen corresponding path program 1 times [2019-10-22 09:01:25,671 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:01:25,671 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54240710] [2019-10-22 09:01:25,671 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:25,671 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:25,671 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:01:25,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:25,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:25,872 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:01:25,872 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54240710] [2019-10-22 09:01:25,873 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-22 09:01:25,873 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-10-22 09:01:25,873 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213678102] [2019-10-22 09:01:25,878 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-22 09:01:25,878 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 09:01:25,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-22 09:01:25,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-10-22 09:01:25,893 INFO L87 Difference]: Start difference. First operand 15 states. Second operand 7 states. [2019-10-22 09:01:25,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:01:25,995 INFO L93 Difference]: Finished difference Result 24 states and 27 transitions. [2019-10-22 09:01:25,995 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-22 09:01:25,997 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 9 [2019-10-22 09:01:25,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 09:01:26,005 INFO L225 Difference]: With dead ends: 24 [2019-10-22 09:01:26,005 INFO L226 Difference]: Without dead ends: 14 [2019-10-22 09:01:26,008 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2019-10-22 09:01:26,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2019-10-22 09:01:26,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2019-10-22 09:01:26,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2019-10-22 09:01:26,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2019-10-22 09:01:26,045 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 9 [2019-10-22 09:01:26,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 09:01:26,045 INFO L462 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2019-10-22 09:01:26,045 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-22 09:01:26,045 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2019-10-22 09:01:26,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-10-22 09:01:26,047 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:01:26,047 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 09:01:26,047 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 09:01:26,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:01:26,048 INFO L82 PathProgramCache]: Analyzing trace with hash -881029229, now seen corresponding path program 1 times [2019-10-22 09:01:26,048 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:01:26,048 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591504335] [2019-10-22 09:01:26,049 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:26,049 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:26,049 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:01:26,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:26,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:26,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:26,149 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-22 09:01:26,150 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591504335] [2019-10-22 09:01:26,150 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [679142149] [2019-10-22 09:01:26,150 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6b405c84-5f7a-488b-b013-ae4621692c18/bin/uautomizer/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:01:26,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:26,201 INFO L256 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-22 09:01:26,206 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:01:26,269 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-22 09:01:26,269 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 09:01:26,270 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 9 [2019-10-22 09:01:26,270 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107255833] [2019-10-22 09:01:26,273 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-22 09:01:26,274 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 09:01:26,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-22 09:01:26,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2019-10-22 09:01:26,274 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 9 states. [2019-10-22 09:01:26,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:01:26,379 INFO L93 Difference]: Finished difference Result 21 states and 22 transitions. [2019-10-22 09:01:26,380 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-22 09:01:26,380 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2019-10-22 09:01:26,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 09:01:26,381 INFO L225 Difference]: With dead ends: 21 [2019-10-22 09:01:26,381 INFO L226 Difference]: Without dead ends: 17 [2019-10-22 09:01:26,382 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2019-10-22 09:01:26,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2019-10-22 09:01:26,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2019-10-22 09:01:26,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-10-22 09:01:26,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2019-10-22 09:01:26,386 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 15 [2019-10-22 09:01:26,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 09:01:26,386 INFO L462 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2019-10-22 09:01:26,386 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-22 09:01:26,387 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2019-10-22 09:01:26,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-10-22 09:01:26,387 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:01:26,388 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 09:01:26,588 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:01:26,589 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 09:01:26,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:01:26,589 INFO L82 PathProgramCache]: Analyzing trace with hash -1824240471, now seen corresponding path program 2 times [2019-10-22 09:01:26,589 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:01:26,589 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572900541] [2019-10-22 09:01:26,589 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:26,590 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:26,590 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:01:26,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:26,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:26,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:26,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:26,750 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-10-22 09:01:26,750 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572900541] [2019-10-22 09:01:26,751 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [591658696] [2019-10-22 09:01:26,751 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6b405c84-5f7a-488b-b013-ae4621692c18/bin/uautomizer/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:01:26,780 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-22 09:01:26,780 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 09:01:26,781 INFO L256 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-22 09:01:26,782 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:01:26,809 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-10-22 09:01:26,810 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 09:01:26,810 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 10 [2019-10-22 09:01:26,810 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343543745] [2019-10-22 09:01:26,811 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-22 09:01:26,811 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 09:01:26,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-22 09:01:26,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2019-10-22 09:01:26,812 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 10 states. [2019-10-22 09:01:26,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:01:26,893 INFO L93 Difference]: Finished difference Result 24 states and 25 transitions. [2019-10-22 09:01:26,894 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-22 09:01:26,894 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 21 [2019-10-22 09:01:26,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 09:01:26,895 INFO L225 Difference]: With dead ends: 24 [2019-10-22 09:01:26,895 INFO L226 Difference]: Without dead ends: 20 [2019-10-22 09:01:26,895 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2019-10-22 09:01:26,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-10-22 09:01:26,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2019-10-22 09:01:26,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-10-22 09:01:26,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2019-10-22 09:01:26,900 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 21 [2019-10-22 09:01:26,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 09:01:26,900 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2019-10-22 09:01:26,900 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-22 09:01:26,900 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2019-10-22 09:01:26,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-10-22 09:01:26,901 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:01:26,901 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 09:01:27,101 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:01:27,102 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 09:01:27,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:01:27,102 INFO L82 PathProgramCache]: Analyzing trace with hash -28473709, now seen corresponding path program 3 times [2019-10-22 09:01:27,102 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:01:27,103 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38936959] [2019-10-22 09:01:27,103 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:27,103 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:27,103 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:01:27,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:27,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:27,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:27,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:27,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:27,278 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-22 09:01:27,278 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38936959] [2019-10-22 09:01:27,278 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [436522238] [2019-10-22 09:01:27,278 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6b405c84-5f7a-488b-b013-ae4621692c18/bin/uautomizer/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:01:27,321 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-10-22 09:01:27,322 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 09:01:27,322 INFO L256 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2019-10-22 09:01:27,324 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:01:27,344 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-22 09:01:27,345 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 09:01:27,345 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 11 [2019-10-22 09:01:27,345 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384554001] [2019-10-22 09:01:27,345 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-22 09:01:27,346 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 09:01:27,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-22 09:01:27,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2019-10-22 09:01:27,346 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 11 states. [2019-10-22 09:01:27,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:01:27,452 INFO L93 Difference]: Finished difference Result 27 states and 28 transitions. [2019-10-22 09:01:27,452 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-22 09:01:27,452 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 27 [2019-10-22 09:01:27,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 09:01:27,453 INFO L225 Difference]: With dead ends: 27 [2019-10-22 09:01:27,453 INFO L226 Difference]: Without dead ends: 23 [2019-10-22 09:01:27,454 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2019-10-22 09:01:27,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2019-10-22 09:01:27,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2019-10-22 09:01:27,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-10-22 09:01:27,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2019-10-22 09:01:27,461 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 27 [2019-10-22 09:01:27,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 09:01:27,462 INFO L462 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2019-10-22 09:01:27,462 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-22 09:01:27,462 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2019-10-22 09:01:27,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2019-10-22 09:01:27,463 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:01:27,463 INFO L380 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 09:01:27,663 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:01:27,664 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 09:01:27,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:01:27,664 INFO L82 PathProgramCache]: Analyzing trace with hash -2080894167, now seen corresponding path program 4 times [2019-10-22 09:01:27,664 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:01:27,664 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280893951] [2019-10-22 09:01:27,665 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:27,665 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:27,665 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:01:27,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:27,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:27,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:27,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:27,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:27,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:27,856 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2019-10-22 09:01:27,856 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280893951] [2019-10-22 09:01:27,857 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1937240535] [2019-10-22 09:01:27,857 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6b405c84-5f7a-488b-b013-ae4621692c18/bin/uautomizer/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:01:27,894 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-22 09:01:27,894 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 09:01:27,895 INFO L256 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 12 conjunts are in the unsatisfiable core [2019-10-22 09:01:27,902 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:01:27,938 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2019-10-22 09:01:27,939 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 09:01:27,939 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 12 [2019-10-22 09:01:27,939 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454969394] [2019-10-22 09:01:27,940 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-22 09:01:27,940 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 09:01:27,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-22 09:01:27,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2019-10-22 09:01:27,941 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand 12 states. [2019-10-22 09:01:28,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:01:28,059 INFO L93 Difference]: Finished difference Result 30 states and 31 transitions. [2019-10-22 09:01:28,059 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-22 09:01:28,059 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 33 [2019-10-22 09:01:28,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 09:01:28,060 INFO L225 Difference]: With dead ends: 30 [2019-10-22 09:01:28,061 INFO L226 Difference]: Without dead ends: 26 [2019-10-22 09:01:28,061 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2019-10-22 09:01:28,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-10-22 09:01:28,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2019-10-22 09:01:28,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-10-22 09:01:28,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2019-10-22 09:01:28,067 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 33 [2019-10-22 09:01:28,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 09:01:28,067 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2019-10-22 09:01:28,067 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-22 09:01:28,067 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2019-10-22 09:01:28,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-10-22 09:01:28,068 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:01:28,068 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 09:01:28,269 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:01:28,269 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 09:01:28,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:01:28,269 INFO L82 PathProgramCache]: Analyzing trace with hash -687460973, now seen corresponding path program 5 times [2019-10-22 09:01:28,270 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:01:28,270 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374082412] [2019-10-22 09:01:28,270 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:28,270 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:28,270 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:01:28,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:28,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:28,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:28,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:28,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:28,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:28,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:28,506 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2019-10-22 09:01:28,506 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374082412] [2019-10-22 09:01:28,507 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [127345855] [2019-10-22 09:01:28,507 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6b405c84-5f7a-488b-b013-ae4621692c18/bin/uautomizer/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:01:28,549 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2019-10-22 09:01:28,549 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 09:01:28,551 INFO L256 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 14 conjunts are in the unsatisfiable core [2019-10-22 09:01:28,565 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:01:28,641 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2019-10-22 09:01:28,641 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 09:01:28,641 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 13 [2019-10-22 09:01:28,642 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620017708] [2019-10-22 09:01:28,642 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-10-22 09:01:28,642 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 09:01:28,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-10-22 09:01:28,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2019-10-22 09:01:28,643 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand 13 states. [2019-10-22 09:01:28,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:01:28,756 INFO L93 Difference]: Finished difference Result 33 states and 34 transitions. [2019-10-22 09:01:28,757 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-22 09:01:28,757 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 39 [2019-10-22 09:01:28,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 09:01:28,758 INFO L225 Difference]: With dead ends: 33 [2019-10-22 09:01:28,758 INFO L226 Difference]: Without dead ends: 29 [2019-10-22 09:01:28,758 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2019-10-22 09:01:28,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-10-22 09:01:28,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2019-10-22 09:01:28,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-10-22 09:01:28,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2019-10-22 09:01:28,764 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 39 [2019-10-22 09:01:28,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 09:01:28,765 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2019-10-22 09:01:28,765 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-10-22 09:01:28,765 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2019-10-22 09:01:28,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2019-10-22 09:01:28,766 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:01:28,766 INFO L380 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 09:01:28,966 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:01:28,967 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 09:01:28,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:01:28,967 INFO L82 PathProgramCache]: Analyzing trace with hash 547744169, now seen corresponding path program 6 times [2019-10-22 09:01:28,967 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:01:28,968 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359699324] [2019-10-22 09:01:28,968 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:28,968 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:28,968 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:01:28,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:29,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:29,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:29,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:29,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:29,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:29,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:29,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:29,174 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2019-10-22 09:01:29,175 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359699324] [2019-10-22 09:01:29,175 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [445405985] [2019-10-22 09:01:29,175 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6b405c84-5f7a-488b-b013-ae4621692c18/bin/uautomizer/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:01:29,218 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-10-22 09:01:29,218 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 09:01:29,219 INFO L256 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 16 conjunts are in the unsatisfiable core [2019-10-22 09:01:29,221 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:01:29,257 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2019-10-22 09:01:29,257 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 09:01:29,257 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 14 [2019-10-22 09:01:29,258 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124076310] [2019-10-22 09:01:29,258 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-10-22 09:01:29,258 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 09:01:29,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-10-22 09:01:29,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2019-10-22 09:01:29,259 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand 14 states. [2019-10-22 09:01:29,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:01:29,371 INFO L93 Difference]: Finished difference Result 36 states and 37 transitions. [2019-10-22 09:01:29,371 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-10-22 09:01:29,371 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 45 [2019-10-22 09:01:29,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 09:01:29,372 INFO L225 Difference]: With dead ends: 36 [2019-10-22 09:01:29,372 INFO L226 Difference]: Without dead ends: 32 [2019-10-22 09:01:29,373 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=124, Invalid=296, Unknown=0, NotChecked=0, Total=420 [2019-10-22 09:01:29,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-10-22 09:01:29,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2019-10-22 09:01:29,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-10-22 09:01:29,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2019-10-22 09:01:29,377 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 45 [2019-10-22 09:01:29,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 09:01:29,378 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2019-10-22 09:01:29,378 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-10-22 09:01:29,378 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2019-10-22 09:01:29,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2019-10-22 09:01:29,379 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:01:29,379 INFO L380 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 09:01:29,580 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:01:29,581 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 09:01:29,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:01:29,581 INFO L82 PathProgramCache]: Analyzing trace with hash -247823213, now seen corresponding path program 7 times [2019-10-22 09:01:29,581 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:01:29,581 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836557048] [2019-10-22 09:01:29,581 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:29,581 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:29,582 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:01:29,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:29,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:29,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:29,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:29,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:29,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:29,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:29,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:29,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:29,790 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2019-10-22 09:01:29,790 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836557048] [2019-10-22 09:01:29,790 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2067737192] [2019-10-22 09:01:29,790 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6b405c84-5f7a-488b-b013-ae4621692c18/bin/uautomizer/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:01:29,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:29,833 INFO L256 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 18 conjunts are in the unsatisfiable core [2019-10-22 09:01:29,835 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:01:29,879 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2019-10-22 09:01:29,879 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 09:01:29,879 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 15 [2019-10-22 09:01:29,879 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298840761] [2019-10-22 09:01:29,880 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-10-22 09:01:29,880 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 09:01:29,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-10-22 09:01:29,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2019-10-22 09:01:29,880 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand 15 states. [2019-10-22 09:01:30,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:01:30,014 INFO L93 Difference]: Finished difference Result 39 states and 40 transitions. [2019-10-22 09:01:30,015 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-22 09:01:30,015 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 51 [2019-10-22 09:01:30,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 09:01:30,016 INFO L225 Difference]: With dead ends: 39 [2019-10-22 09:01:30,016 INFO L226 Difference]: Without dead ends: 35 [2019-10-22 09:01:30,017 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=152, Invalid=354, Unknown=0, NotChecked=0, Total=506 [2019-10-22 09:01:30,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-10-22 09:01:30,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2019-10-22 09:01:30,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-10-22 09:01:30,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2019-10-22 09:01:30,026 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 51 [2019-10-22 09:01:30,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 09:01:30,027 INFO L462 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2019-10-22 09:01:30,027 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-10-22 09:01:30,027 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2019-10-22 09:01:30,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2019-10-22 09:01:30,028 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:01:30,028 INFO L380 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 09:01:30,228 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:01:30,229 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 09:01:30,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:01:30,229 INFO L82 PathProgramCache]: Analyzing trace with hash -1818636247, now seen corresponding path program 8 times [2019-10-22 09:01:30,229 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:01:30,229 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022787669] [2019-10-22 09:01:30,229 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:30,229 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:30,230 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:01:30,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:30,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:30,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:30,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:30,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:30,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:30,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:30,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:30,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:30,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:30,477 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2019-10-22 09:01:30,477 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022787669] [2019-10-22 09:01:30,478 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [213135408] [2019-10-22 09:01:30,478 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6b405c84-5f7a-488b-b013-ae4621692c18/bin/uautomizer/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:01:30,517 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-22 09:01:30,518 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 09:01:30,519 INFO L256 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 20 conjunts are in the unsatisfiable core [2019-10-22 09:01:30,521 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:01:30,550 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2019-10-22 09:01:30,551 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 09:01:30,551 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 16 [2019-10-22 09:01:30,551 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927864972] [2019-10-22 09:01:30,551 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-10-22 09:01:30,552 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 09:01:30,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-10-22 09:01:30,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2019-10-22 09:01:30,552 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand 16 states. [2019-10-22 09:01:30,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:01:30,668 INFO L93 Difference]: Finished difference Result 42 states and 43 transitions. [2019-10-22 09:01:30,668 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-22 09:01:30,668 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 57 [2019-10-22 09:01:30,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 09:01:30,669 INFO L225 Difference]: With dead ends: 42 [2019-10-22 09:01:30,669 INFO L226 Difference]: Without dead ends: 38 [2019-10-22 09:01:30,670 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=183, Invalid=417, Unknown=0, NotChecked=0, Total=600 [2019-10-22 09:01:30,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2019-10-22 09:01:30,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2019-10-22 09:01:30,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-10-22 09:01:30,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2019-10-22 09:01:30,674 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 57 [2019-10-22 09:01:30,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 09:01:30,675 INFO L462 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2019-10-22 09:01:30,675 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-10-22 09:01:30,675 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2019-10-22 09:01:30,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2019-10-22 09:01:30,676 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:01:30,676 INFO L380 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 09:01:30,877 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:01:30,877 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 09:01:30,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:01:30,877 INFO L82 PathProgramCache]: Analyzing trace with hash -2055304301, now seen corresponding path program 9 times [2019-10-22 09:01:30,878 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:01:30,878 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452620643] [2019-10-22 09:01:30,878 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:30,878 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:30,878 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:01:30,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:30,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:30,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:30,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:30,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:31,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:31,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:31,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:31,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:31,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:31,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:31,143 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2019-10-22 09:01:31,143 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452620643] [2019-10-22 09:01:31,143 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1993544986] [2019-10-22 09:01:31,144 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6b405c84-5f7a-488b-b013-ae4621692c18/bin/uautomizer/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:01:31,190 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2019-10-22 09:01:31,190 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 09:01:31,191 INFO L256 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 22 conjunts are in the unsatisfiable core [2019-10-22 09:01:31,194 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:01:31,230 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2019-10-22 09:01:31,230 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 09:01:31,230 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 17 [2019-10-22 09:01:31,231 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058780142] [2019-10-22 09:01:31,231 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-10-22 09:01:31,231 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 09:01:31,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-10-22 09:01:31,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2019-10-22 09:01:31,232 INFO L87 Difference]: Start difference. First operand 38 states and 39 transitions. Second operand 17 states. [2019-10-22 09:01:31,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:01:31,402 INFO L93 Difference]: Finished difference Result 45 states and 46 transitions. [2019-10-22 09:01:31,402 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-10-22 09:01:31,402 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 63 [2019-10-22 09:01:31,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 09:01:31,403 INFO L225 Difference]: With dead ends: 45 [2019-10-22 09:01:31,404 INFO L226 Difference]: Without dead ends: 41 [2019-10-22 09:01:31,404 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=217, Invalid=485, Unknown=0, NotChecked=0, Total=702 [2019-10-22 09:01:31,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2019-10-22 09:01:31,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2019-10-22 09:01:31,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-10-22 09:01:31,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2019-10-22 09:01:31,410 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 63 [2019-10-22 09:01:31,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 09:01:31,410 INFO L462 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2019-10-22 09:01:31,410 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-10-22 09:01:31,410 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2019-10-22 09:01:31,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2019-10-22 09:01:31,411 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:01:31,412 INFO L380 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 09:01:31,612 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:01:31,612 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 09:01:31,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:01:31,613 INFO L82 PathProgramCache]: Analyzing trace with hash -1172322647, now seen corresponding path program 10 times [2019-10-22 09:01:31,613 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:01:31,613 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441493131] [2019-10-22 09:01:31,613 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:31,613 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:31,613 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:01:31,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:31,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:31,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:31,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:31,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:31,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:31,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:31,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:31,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:31,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:31,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:31,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:31,986 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2019-10-22 09:01:31,987 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441493131] [2019-10-22 09:01:31,987 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [921743871] [2019-10-22 09:01:31,987 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6b405c84-5f7a-488b-b013-ae4621692c18/bin/uautomizer/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:01:32,037 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-22 09:01:32,037 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 09:01:32,038 INFO L256 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 24 conjunts are in the unsatisfiable core [2019-10-22 09:01:32,041 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:01:32,101 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2019-10-22 09:01:32,102 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 09:01:32,102 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 18 [2019-10-22 09:01:32,102 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962814346] [2019-10-22 09:01:32,103 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-10-22 09:01:32,104 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 09:01:32,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-10-22 09:01:32,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2019-10-22 09:01:32,104 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand 18 states. [2019-10-22 09:01:32,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:01:32,265 INFO L93 Difference]: Finished difference Result 48 states and 49 transitions. [2019-10-22 09:01:32,265 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-10-22 09:01:32,265 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 69 [2019-10-22 09:01:32,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 09:01:32,266 INFO L225 Difference]: With dead ends: 48 [2019-10-22 09:01:32,266 INFO L226 Difference]: Without dead ends: 44 [2019-10-22 09:01:32,267 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=254, Invalid=558, Unknown=0, NotChecked=0, Total=812 [2019-10-22 09:01:32,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2019-10-22 09:01:32,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2019-10-22 09:01:32,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-10-22 09:01:32,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 45 transitions. [2019-10-22 09:01:32,274 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 45 transitions. Word has length 69 [2019-10-22 09:01:32,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 09:01:32,275 INFO L462 AbstractCegarLoop]: Abstraction has 44 states and 45 transitions. [2019-10-22 09:01:32,275 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-10-22 09:01:32,275 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 45 transitions. [2019-10-22 09:01:32,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2019-10-22 09:01:32,276 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:01:32,276 INFO L380 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 09:01:32,480 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:01:32,481 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 09:01:32,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:01:32,481 INFO L82 PathProgramCache]: Analyzing trace with hash -1452916077, now seen corresponding path program 11 times [2019-10-22 09:01:32,481 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:01:32,481 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041815149] [2019-10-22 09:01:32,481 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:32,481 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:32,481 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:01:32,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:32,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:32,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:32,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:32,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:32,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:32,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:32,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:32,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:32,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:32,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:32,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:32,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:32,827 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2019-10-22 09:01:32,827 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041815149] [2019-10-22 09:01:32,827 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1156272789] [2019-10-22 09:01:32,828 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6b405c84-5f7a-488b-b013-ae4621692c18/bin/uautomizer/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:01:32,886 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2019-10-22 09:01:32,886 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 09:01:32,887 INFO L256 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 26 conjunts are in the unsatisfiable core [2019-10-22 09:01:32,889 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:01:32,936 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2019-10-22 09:01:32,937 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 09:01:32,937 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 19 [2019-10-22 09:01:32,937 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45346087] [2019-10-22 09:01:32,938 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-10-22 09:01:32,939 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 09:01:32,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-10-22 09:01:32,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=240, Unknown=0, NotChecked=0, Total=342 [2019-10-22 09:01:32,939 INFO L87 Difference]: Start difference. First operand 44 states and 45 transitions. Second operand 19 states. [2019-10-22 09:01:33,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:01:33,109 INFO L93 Difference]: Finished difference Result 51 states and 52 transitions. [2019-10-22 09:01:33,109 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-10-22 09:01:33,110 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 75 [2019-10-22 09:01:33,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 09:01:33,110 INFO L225 Difference]: With dead ends: 51 [2019-10-22 09:01:33,111 INFO L226 Difference]: Without dead ends: 47 [2019-10-22 09:01:33,114 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=294, Invalid=636, Unknown=0, NotChecked=0, Total=930 [2019-10-22 09:01:33,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2019-10-22 09:01:33,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2019-10-22 09:01:33,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2019-10-22 09:01:33,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 48 transitions. [2019-10-22 09:01:33,119 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 48 transitions. Word has length 75 [2019-10-22 09:01:33,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 09:01:33,120 INFO L462 AbstractCegarLoop]: Abstraction has 47 states and 48 transitions. [2019-10-22 09:01:33,120 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-10-22 09:01:33,120 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 48 transitions. [2019-10-22 09:01:33,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2019-10-22 09:01:33,121 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:01:33,121 INFO L380 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 09:01:33,321 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:01:33,322 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 09:01:33,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:01:33,322 INFO L82 PathProgramCache]: Analyzing trace with hash -461124311, now seen corresponding path program 12 times [2019-10-22 09:01:33,322 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:01:33,322 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660672993] [2019-10-22 09:01:33,322 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:33,322 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:33,322 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:01:33,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:33,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:33,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:33,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:33,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:33,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:33,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:33,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:33,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:33,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:33,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:33,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:33,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:33,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:33,707 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2019-10-22 09:01:33,707 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660672993] [2019-10-22 09:01:33,707 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [291614551] [2019-10-22 09:01:33,707 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6b405c84-5f7a-488b-b013-ae4621692c18/bin/uautomizer/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:01:33,773 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2019-10-22 09:01:33,774 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 09:01:33,775 INFO L256 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 28 conjunts are in the unsatisfiable core [2019-10-22 09:01:33,777 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:01:33,839 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2019-10-22 09:01:33,839 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 09:01:33,840 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 20 [2019-10-22 09:01:33,840 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939582499] [2019-10-22 09:01:33,840 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-10-22 09:01:33,840 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 09:01:33,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-10-22 09:01:33,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=264, Unknown=0, NotChecked=0, Total=380 [2019-10-22 09:01:33,841 INFO L87 Difference]: Start difference. First operand 47 states and 48 transitions. Second operand 20 states. [2019-10-22 09:01:34,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:01:34,059 INFO L93 Difference]: Finished difference Result 54 states and 55 transitions. [2019-10-22 09:01:34,059 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-10-22 09:01:34,059 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 81 [2019-10-22 09:01:34,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 09:01:34,060 INFO L225 Difference]: With dead ends: 54 [2019-10-22 09:01:34,060 INFO L226 Difference]: Without dead ends: 50 [2019-10-22 09:01:34,061 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=337, Invalid=719, Unknown=0, NotChecked=0, Total=1056 [2019-10-22 09:01:34,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2019-10-22 09:01:34,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2019-10-22 09:01:34,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2019-10-22 09:01:34,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 51 transitions. [2019-10-22 09:01:34,066 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 51 transitions. Word has length 81 [2019-10-22 09:01:34,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 09:01:34,066 INFO L462 AbstractCegarLoop]: Abstraction has 50 states and 51 transitions. [2019-10-22 09:01:34,066 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-10-22 09:01:34,066 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 51 transitions. [2019-10-22 09:01:34,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2019-10-22 09:01:34,067 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:01:34,067 INFO L380 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 09:01:34,268 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:01:34,268 INFO L410 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 09:01:34,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:01:34,268 INFO L82 PathProgramCache]: Analyzing trace with hash -1887065709, now seen corresponding path program 13 times [2019-10-22 09:01:34,268 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:01:34,268 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782922518] [2019-10-22 09:01:34,269 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:34,269 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:34,269 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:01:34,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:34,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:34,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:34,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:34,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:34,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:34,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:34,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:34,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:34,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:34,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:34,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:34,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:34,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:34,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:34,677 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2019-10-22 09:01:34,677 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782922518] [2019-10-22 09:01:34,677 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [846564340] [2019-10-22 09:01:34,677 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6b405c84-5f7a-488b-b013-ae4621692c18/bin/uautomizer/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:01:34,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:34,727 INFO L256 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 30 conjunts are in the unsatisfiable core [2019-10-22 09:01:34,728 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:01:34,787 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2019-10-22 09:01:34,788 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 09:01:34,788 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 21 [2019-10-22 09:01:34,788 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459199879] [2019-10-22 09:01:34,788 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-10-22 09:01:34,789 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 09:01:34,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-10-22 09:01:34,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=289, Unknown=0, NotChecked=0, Total=420 [2019-10-22 09:01:34,789 INFO L87 Difference]: Start difference. First operand 50 states and 51 transitions. Second operand 21 states. [2019-10-22 09:01:35,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:01:35,021 INFO L93 Difference]: Finished difference Result 57 states and 58 transitions. [2019-10-22 09:01:35,021 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-10-22 09:01:35,021 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 87 [2019-10-22 09:01:35,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 09:01:35,022 INFO L225 Difference]: With dead ends: 57 [2019-10-22 09:01:35,022 INFO L226 Difference]: Without dead ends: 53 [2019-10-22 09:01:35,023 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=383, Invalid=807, Unknown=0, NotChecked=0, Total=1190 [2019-10-22 09:01:35,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2019-10-22 09:01:35,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2019-10-22 09:01:35,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2019-10-22 09:01:35,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2019-10-22 09:01:35,030 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 87 [2019-10-22 09:01:35,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 09:01:35,031 INFO L462 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2019-10-22 09:01:35,031 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-10-22 09:01:35,031 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2019-10-22 09:01:35,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2019-10-22 09:01:35,032 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:01:35,032 INFO L380 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 09:01:35,232 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:01:35,233 INFO L410 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 09:01:35,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:01:35,233 INFO L82 PathProgramCache]: Analyzing trace with hash -1777212503, now seen corresponding path program 14 times [2019-10-22 09:01:35,233 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:01:35,233 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681292160] [2019-10-22 09:01:35,233 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:35,233 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:35,233 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:01:35,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:35,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:35,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:35,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:35,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:35,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:35,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:35,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:35,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:35,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:35,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:35,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:35,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:35,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:35,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:35,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:35,695 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2019-10-22 09:01:35,695 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681292160] [2019-10-22 09:01:35,696 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [175229858] [2019-10-22 09:01:35,696 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6b405c84-5f7a-488b-b013-ae4621692c18/bin/uautomizer/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:01:35,753 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-22 09:01:35,753 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 09:01:35,754 INFO L256 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 32 conjunts are in the unsatisfiable core [2019-10-22 09:01:35,756 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:01:35,806 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2019-10-22 09:01:35,806 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 09:01:35,807 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 22 [2019-10-22 09:01:35,807 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433382245] [2019-10-22 09:01:35,807 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-10-22 09:01:35,808 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 09:01:35,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-10-22 09:01:35,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=315, Unknown=0, NotChecked=0, Total=462 [2019-10-22 09:01:35,808 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand 22 states. [2019-10-22 09:01:36,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:01:36,056 INFO L93 Difference]: Finished difference Result 60 states and 61 transitions. [2019-10-22 09:01:36,057 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-10-22 09:01:36,057 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 93 [2019-10-22 09:01:36,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 09:01:36,058 INFO L225 Difference]: With dead ends: 60 [2019-10-22 09:01:36,058 INFO L226 Difference]: Without dead ends: 56 [2019-10-22 09:01:36,059 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=432, Invalid=900, Unknown=0, NotChecked=0, Total=1332 [2019-10-22 09:01:36,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2019-10-22 09:01:36,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2019-10-22 09:01:36,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2019-10-22 09:01:36,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 57 transitions. [2019-10-22 09:01:36,070 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 57 transitions. Word has length 93 [2019-10-22 09:01:36,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 09:01:36,070 INFO L462 AbstractCegarLoop]: Abstraction has 56 states and 57 transitions. [2019-10-22 09:01:36,071 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-10-22 09:01:36,071 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 57 transitions. [2019-10-22 09:01:36,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2019-10-22 09:01:36,071 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:01:36,072 INFO L380 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 09:01:36,273 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:01:36,273 INFO L410 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 09:01:36,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:01:36,273 INFO L82 PathProgramCache]: Analyzing trace with hash -948911981, now seen corresponding path program 15 times [2019-10-22 09:01:36,273 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:01:36,273 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732022905] [2019-10-22 09:01:36,274 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:36,274 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:36,274 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:01:36,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:36,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:36,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:36,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:36,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:36,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:36,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:36,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:36,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:36,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:36,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:36,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:36,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:36,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:36,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:36,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:36,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:36,788 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2019-10-22 09:01:36,788 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732022905] [2019-10-22 09:01:36,788 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [337855076] [2019-10-22 09:01:36,788 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6b405c84-5f7a-488b-b013-ae4621692c18/bin/uautomizer/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:01:36,862 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2019-10-22 09:01:36,862 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 09:01:36,863 INFO L256 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 34 conjunts are in the unsatisfiable core [2019-10-22 09:01:36,865 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:01:36,916 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2019-10-22 09:01:36,916 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 09:01:36,916 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 23 [2019-10-22 09:01:36,916 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413302913] [2019-10-22 09:01:36,917 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-10-22 09:01:36,917 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 09:01:36,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-10-22 09:01:36,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=342, Unknown=0, NotChecked=0, Total=506 [2019-10-22 09:01:36,918 INFO L87 Difference]: Start difference. First operand 56 states and 57 transitions. Second operand 23 states. [2019-10-22 09:01:37,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:01:37,112 INFO L93 Difference]: Finished difference Result 63 states and 64 transitions. [2019-10-22 09:01:37,113 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-10-22 09:01:37,113 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 99 [2019-10-22 09:01:37,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 09:01:37,114 INFO L225 Difference]: With dead ends: 63 [2019-10-22 09:01:37,114 INFO L226 Difference]: Without dead ends: 59 [2019-10-22 09:01:37,115 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=484, Invalid=998, Unknown=0, NotChecked=0, Total=1482 [2019-10-22 09:01:37,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2019-10-22 09:01:37,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2019-10-22 09:01:37,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2019-10-22 09:01:37,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 60 transitions. [2019-10-22 09:01:37,123 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 60 transitions. Word has length 99 [2019-10-22 09:01:37,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 09:01:37,123 INFO L462 AbstractCegarLoop]: Abstraction has 59 states and 60 transitions. [2019-10-22 09:01:37,123 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-10-22 09:01:37,124 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 60 transitions. [2019-10-22 09:01:37,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2019-10-22 09:01:37,125 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:01:37,125 INFO L380 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 09:01:37,326 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:01:37,326 INFO L410 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 09:01:37,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:01:37,326 INFO L82 PathProgramCache]: Analyzing trace with hash 1159072297, now seen corresponding path program 16 times [2019-10-22 09:01:37,327 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:01:37,327 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423267610] [2019-10-22 09:01:37,327 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:37,327 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:37,327 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:01:37,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:37,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:37,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:37,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:37,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:37,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:37,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:37,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:37,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:37,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:37,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:37,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:37,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:37,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:37,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:37,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:37,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:37,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:37,899 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2019-10-22 09:01:37,900 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423267610] [2019-10-22 09:01:37,900 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [675761152] [2019-10-22 09:01:37,900 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6b405c84-5f7a-488b-b013-ae4621692c18/bin/uautomizer/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:01:37,976 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-22 09:01:37,976 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 09:01:37,978 INFO L256 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 36 conjunts are in the unsatisfiable core [2019-10-22 09:01:37,981 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:01:38,054 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2019-10-22 09:01:38,054 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 09:01:38,054 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21] total 24 [2019-10-22 09:01:38,054 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165208674] [2019-10-22 09:01:38,055 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-10-22 09:01:38,056 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 09:01:38,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-10-22 09:01:38,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=370, Unknown=0, NotChecked=0, Total=552 [2019-10-22 09:01:38,057 INFO L87 Difference]: Start difference. First operand 59 states and 60 transitions. Second operand 24 states. [2019-10-22 09:01:38,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:01:38,308 INFO L93 Difference]: Finished difference Result 66 states and 67 transitions. [2019-10-22 09:01:38,308 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-10-22 09:01:38,309 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 105 [2019-10-22 09:01:38,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 09:01:38,310 INFO L225 Difference]: With dead ends: 66 [2019-10-22 09:01:38,310 INFO L226 Difference]: Without dead ends: 62 [2019-10-22 09:01:38,310 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=539, Invalid=1101, Unknown=0, NotChecked=0, Total=1640 [2019-10-22 09:01:38,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2019-10-22 09:01:38,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2019-10-22 09:01:38,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2019-10-22 09:01:38,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 63 transitions. [2019-10-22 09:01:38,316 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 63 transitions. Word has length 105 [2019-10-22 09:01:38,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 09:01:38,316 INFO L462 AbstractCegarLoop]: Abstraction has 62 states and 63 transitions. [2019-10-22 09:01:38,316 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-10-22 09:01:38,316 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 63 transitions. [2019-10-22 09:01:38,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2019-10-22 09:01:38,317 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:01:38,318 INFO L380 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 09:01:38,518 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:01:38,518 INFO L410 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 09:01:38,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:01:38,519 INFO L82 PathProgramCache]: Analyzing trace with hash 2109441939, now seen corresponding path program 17 times [2019-10-22 09:01:38,519 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:01:38,519 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248714948] [2019-10-22 09:01:38,519 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:38,519 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:38,519 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:01:38,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:38,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:38,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:38,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:38,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:38,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:38,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:38,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:38,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:38,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:38,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:38,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:38,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:38,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:38,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:38,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:38,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:39,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:39,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:39,130 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2019-10-22 09:01:39,131 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248714948] [2019-10-22 09:01:39,131 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [619988236] [2019-10-22 09:01:39,131 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6b405c84-5f7a-488b-b013-ae4621692c18/bin/uautomizer/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:01:39,223 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2019-10-22 09:01:39,223 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 09:01:39,225 INFO L256 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 38 conjunts are in the unsatisfiable core [2019-10-22 09:01:39,227 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:01:39,270 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2019-10-22 09:01:39,270 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 09:01:39,270 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 22] total 25 [2019-10-22 09:01:39,271 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846222832] [2019-10-22 09:01:39,271 INFO L442 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-10-22 09:01:39,272 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 09:01:39,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-10-22 09:01:39,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=399, Unknown=0, NotChecked=0, Total=600 [2019-10-22 09:01:39,273 INFO L87 Difference]: Start difference. First operand 62 states and 63 transitions. Second operand 25 states. [2019-10-22 09:01:39,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:01:39,567 INFO L93 Difference]: Finished difference Result 69 states and 70 transitions. [2019-10-22 09:01:39,567 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-10-22 09:01:39,568 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 111 [2019-10-22 09:01:39,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 09:01:39,569 INFO L225 Difference]: With dead ends: 69 [2019-10-22 09:01:39,569 INFO L226 Difference]: Without dead ends: 65 [2019-10-22 09:01:39,570 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=597, Invalid=1209, Unknown=0, NotChecked=0, Total=1806 [2019-10-22 09:01:39,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2019-10-22 09:01:39,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2019-10-22 09:01:39,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2019-10-22 09:01:39,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 66 transitions. [2019-10-22 09:01:39,580 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 66 transitions. Word has length 111 [2019-10-22 09:01:39,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 09:01:39,580 INFO L462 AbstractCegarLoop]: Abstraction has 65 states and 66 transitions. [2019-10-22 09:01:39,580 INFO L463 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-10-22 09:01:39,580 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 66 transitions. [2019-10-22 09:01:39,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2019-10-22 09:01:39,581 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:01:39,582 INFO L380 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 09:01:39,784 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:01:39,784 INFO L410 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 09:01:39,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:01:39,784 INFO L82 PathProgramCache]: Analyzing trace with hash 450642089, now seen corresponding path program 18 times [2019-10-22 09:01:39,785 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:01:39,785 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838199504] [2019-10-22 09:01:39,785 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:39,785 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:39,785 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:01:39,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:39,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:39,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:39,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:39,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:39,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:40,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:40,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:40,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:40,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:40,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:40,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:40,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:40,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:40,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:40,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:40,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:40,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:40,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:40,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:40,491 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2019-10-22 09:01:40,491 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838199504] [2019-10-22 09:01:40,492 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1435736724] [2019-10-22 09:01:40,492 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6b405c84-5f7a-488b-b013-ae4621692c18/bin/uautomizer/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:01:40,557 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2019-10-22 09:01:40,557 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 09:01:40,559 INFO L256 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 40 conjunts are in the unsatisfiable core [2019-10-22 09:01:40,561 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:01:40,617 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2019-10-22 09:01:40,617 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 09:01:40,618 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 23] total 26 [2019-10-22 09:01:40,618 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781561274] [2019-10-22 09:01:40,618 INFO L442 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-10-22 09:01:40,618 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 09:01:40,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-10-22 09:01:40,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=221, Invalid=429, Unknown=0, NotChecked=0, Total=650 [2019-10-22 09:01:40,619 INFO L87 Difference]: Start difference. First operand 65 states and 66 transitions. Second operand 26 states. [2019-10-22 09:01:40,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:01:40,904 INFO L93 Difference]: Finished difference Result 72 states and 73 transitions. [2019-10-22 09:01:40,905 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-10-22 09:01:40,905 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 117 [2019-10-22 09:01:40,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 09:01:40,906 INFO L225 Difference]: With dead ends: 72 [2019-10-22 09:01:40,906 INFO L226 Difference]: Without dead ends: 68 [2019-10-22 09:01:40,906 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 342 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=658, Invalid=1322, Unknown=0, NotChecked=0, Total=1980 [2019-10-22 09:01:40,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2019-10-22 09:01:40,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2019-10-22 09:01:40,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2019-10-22 09:01:40,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 69 transitions. [2019-10-22 09:01:40,923 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 69 transitions. Word has length 117 [2019-10-22 09:01:40,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 09:01:40,924 INFO L462 AbstractCegarLoop]: Abstraction has 68 states and 69 transitions. [2019-10-22 09:01:40,924 INFO L463 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-10-22 09:01:40,924 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 69 transitions. [2019-10-22 09:01:40,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2019-10-22 09:01:40,925 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:01:40,925 INFO L380 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 09:01:41,126 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:01:41,126 INFO L410 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 09:01:41,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:01:41,126 INFO L82 PathProgramCache]: Analyzing trace with hash -1141244269, now seen corresponding path program 19 times [2019-10-22 09:01:41,126 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:01:41,126 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019978324] [2019-10-22 09:01:41,127 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:41,127 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:41,127 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:01:41,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:41,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:41,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:41,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:41,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:41,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:41,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:41,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:41,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:41,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:41,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:41,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:41,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:41,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:41,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:41,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:41,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:41,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:41,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:41,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:41,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:41,827 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2019-10-22 09:01:41,827 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019978324] [2019-10-22 09:01:41,827 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2087042589] [2019-10-22 09:01:41,828 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6b405c84-5f7a-488b-b013-ae4621692c18/bin/uautomizer/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:01:41,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:41,901 INFO L256 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 42 conjunts are in the unsatisfiable core [2019-10-22 09:01:41,903 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:01:41,974 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2019-10-22 09:01:41,974 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 09:01:41,974 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 24] total 27 [2019-10-22 09:01:41,974 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148573826] [2019-10-22 09:01:41,975 INFO L442 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-10-22 09:01:41,975 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 09:01:41,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-10-22 09:01:41,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=242, Invalid=460, Unknown=0, NotChecked=0, Total=702 [2019-10-22 09:01:41,976 INFO L87 Difference]: Start difference. First operand 68 states and 69 transitions. Second operand 27 states. [2019-10-22 09:01:42,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:01:42,269 INFO L93 Difference]: Finished difference Result 75 states and 76 transitions. [2019-10-22 09:01:42,269 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-10-22 09:01:42,269 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 123 [2019-10-22 09:01:42,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 09:01:42,270 INFO L225 Difference]: With dead ends: 75 [2019-10-22 09:01:42,270 INFO L226 Difference]: Without dead ends: 71 [2019-10-22 09:01:42,270 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 380 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=722, Invalid=1440, Unknown=0, NotChecked=0, Total=2162 [2019-10-22 09:01:42,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2019-10-22 09:01:42,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2019-10-22 09:01:42,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2019-10-22 09:01:42,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 72 transitions. [2019-10-22 09:01:42,274 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 72 transitions. Word has length 123 [2019-10-22 09:01:42,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 09:01:42,275 INFO L462 AbstractCegarLoop]: Abstraction has 71 states and 72 transitions. [2019-10-22 09:01:42,275 INFO L463 AbstractCegarLoop]: Interpolant automaton has 27 states. [2019-10-22 09:01:42,275 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 72 transitions. [2019-10-22 09:01:42,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2019-10-22 09:01:42,276 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:01:42,277 INFO L380 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 09:01:42,477 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:01:42,477 INFO L410 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 09:01:42,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:01:42,478 INFO L82 PathProgramCache]: Analyzing trace with hash -1280276695, now seen corresponding path program 20 times [2019-10-22 09:01:42,478 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:01:42,478 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830671082] [2019-10-22 09:01:42,478 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:42,478 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:42,478 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:01:42,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 09:01:42,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 09:01:42,541 INFO L168 tionRefinementEngine]: Strategy CAMEL found a feasible trace [2019-10-22 09:01:42,541 INFO L445 BasicCegarLoop]: Counterexample might be feasible [2019-10-22 09:01:42,602 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.10 09:01:42 BoogieIcfgContainer [2019-10-22 09:01:42,602 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-10-22 09:01:42,602 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-10-22 09:01:42,602 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-10-22 09:01:42,603 INFO L275 PluginConnector]: Witness Printer initialized [2019-10-22 09:01:42,605 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 09:01:25" (3/4) ... [2019-10-22 09:01:42,608 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-10-22 09:01:42,677 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_6b405c84-5f7a-488b-b013-ae4621692c18/bin/uautomizer/witness.graphml [2019-10-22 09:01:42,681 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-10-22 09:01:42,683 INFO L168 Benchmark]: Toolchain (without parser) took 17551.09 ms. Allocated memory was 1.0 GB in the beginning and 1.6 GB in the end (delta: 541.1 MB). Free memory was 944.5 MB in the beginning and 1.5 GB in the end (delta: -508.9 MB). Peak memory consumption was 32.2 MB. Max. memory is 11.5 GB. [2019-10-22 09:01:42,683 INFO L168 Benchmark]: CDTParser took 0.16 ms. Allocated memory is still 1.0 GB. Free memory is still 967.3 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-10-22 09:01:42,683 INFO L168 Benchmark]: CACSL2BoogieTranslator took 246.74 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 153.1 MB). Free memory was 944.5 MB in the beginning and 1.1 GB in the end (delta: -201.7 MB). Peak memory consumption was 22.8 MB. Max. memory is 11.5 GB. [2019-10-22 09:01:42,684 INFO L168 Benchmark]: Boogie Procedure Inliner took 26.58 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-10-22 09:01:42,684 INFO L168 Benchmark]: Boogie Preprocessor took 10.62 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-10-22 09:01:42,684 INFO L168 Benchmark]: RCFGBuilder took 174.39 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: 18.0 MB). Peak memory consumption was 18.0 MB. Max. memory is 11.5 GB. [2019-10-22 09:01:42,685 INFO L168 Benchmark]: TraceAbstraction took 17010.22 ms. Allocated memory was 1.2 GB in the beginning and 1.6 GB in the end (delta: 388.0 MB). Free memory was 1.1 GB in the beginning and 1.5 GB in the end (delta: -343.6 MB). Peak memory consumption was 44.4 MB. Max. memory is 11.5 GB. [2019-10-22 09:01:42,685 INFO L168 Benchmark]: Witness Printer took 78.43 ms. Allocated memory is still 1.6 GB. Free memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: 18.4 MB). Peak memory consumption was 18.4 MB. Max. memory is 11.5 GB. [2019-10-22 09:01:42,686 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16 ms. Allocated memory is still 1.0 GB. Free memory is still 967.3 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 246.74 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 153.1 MB). Free memory was 944.5 MB in the beginning and 1.1 GB in the end (delta: -201.7 MB). Peak memory consumption was 22.8 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 26.58 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 10.62 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 174.39 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: 18.0 MB). Peak memory consumption was 18.0 MB. Max. memory is 11.5 GB. * TraceAbstraction took 17010.22 ms. Allocated memory was 1.2 GB in the beginning and 1.6 GB in the end (delta: 388.0 MB). Free memory was 1.1 GB in the beginning and 1.5 GB in the end (delta: -343.6 MB). Peak memory consumption was 44.4 MB. Max. memory is 11.5 GB. * Witness Printer took 78.43 ms. Allocated memory is still 1.6 GB. Free memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: 18.4 MB). Peak memory consumption was 18.4 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 16]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L12] int a = 20; [L13] int b = 0; [L14] CALL, EXPR sum(a, b) VAL [\old(m)=0, \old(n)=20] [L4] COND FALSE !(n <= 0) VAL [\old(m)=0, \old(n)=20, m=0, n=20] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=1, \old(n)=19] [L4] COND FALSE !(n <= 0) VAL [\old(m)=1, \old(n)=19, m=1, n=19] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=2, \old(n)=18] [L4] COND FALSE !(n <= 0) VAL [\old(m)=2, \old(n)=18, m=2, n=18] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=3, \old(n)=17] [L4] COND FALSE !(n <= 0) VAL [\old(m)=3, \old(n)=17, m=3, n=17] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=4, \old(n)=16] [L4] COND FALSE !(n <= 0) VAL [\old(m)=4, \old(n)=16, m=4, n=16] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=5, \old(n)=15] [L4] COND FALSE !(n <= 0) VAL [\old(m)=5, \old(n)=15, m=5, n=15] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=6, \old(n)=14] [L4] COND FALSE !(n <= 0) VAL [\old(m)=6, \old(n)=14, m=6, n=14] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=7, \old(n)=13] [L4] COND FALSE !(n <= 0) VAL [\old(m)=7, \old(n)=13, m=7, n=13] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=8, \old(n)=12] [L4] COND FALSE !(n <= 0) VAL [\old(m)=8, \old(n)=12, m=8, n=12] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=9, \old(n)=11] [L4] COND FALSE !(n <= 0) VAL [\old(m)=9, \old(n)=11, m=9, n=11] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=10, \old(n)=10] [L4] COND FALSE !(n <= 0) VAL [\old(m)=10, \old(n)=10, m=10, n=10] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=11, \old(n)=9] [L4] COND FALSE !(n <= 0) VAL [\old(m)=11, \old(n)=9, m=11, n=9] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=12, \old(n)=8] [L4] COND FALSE !(n <= 0) VAL [\old(m)=12, \old(n)=8, m=12, n=8] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=13, \old(n)=7] [L4] COND FALSE !(n <= 0) VAL [\old(m)=13, \old(n)=7, m=13, n=7] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=14, \old(n)=6] [L4] COND FALSE !(n <= 0) VAL [\old(m)=14, \old(n)=6, m=14, n=6] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=15, \old(n)=5] [L4] COND FALSE !(n <= 0) VAL [\old(m)=15, \old(n)=5, m=15, n=5] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=16, \old(n)=4] [L4] COND FALSE !(n <= 0) VAL [\old(m)=16, \old(n)=4, m=16, n=4] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=17, \old(n)=3] [L4] COND FALSE !(n <= 0) VAL [\old(m)=17, \old(n)=3, m=17, n=3] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=18, \old(n)=2] [L4] COND FALSE !(n <= 0) VAL [\old(m)=18, \old(n)=2, m=18, n=2] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=19, \old(n)=1] [L4] COND FALSE !(n <= 0) VAL [\old(m)=19, \old(n)=1, m=19, n=1] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=20, \old(n)=0] [L4] COND TRUE n <= 0 [L5] return m + n; VAL [\old(m)=20, \old(n)=0, \result=20, m=20, n=0] [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=19, \old(n)=1, m=19, n=1, sum(n - 1, m + 1)=20] [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=18, \old(n)=2, m=18, n=2, sum(n - 1, m + 1)=20] [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=17, \old(n)=3, m=17, n=3, sum(n - 1, m + 1)=20] [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=16, \old(n)=4, m=16, n=4, sum(n - 1, m + 1)=20] [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=15, \old(n)=5, m=15, n=5, sum(n - 1, m + 1)=20] [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=14, \old(n)=6, m=14, n=6, sum(n - 1, m + 1)=20] [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=13, \old(n)=7, m=13, n=7, sum(n - 1, m + 1)=20] [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=12, \old(n)=8, m=12, n=8, sum(n - 1, m + 1)=20] [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=11, \old(n)=9, m=11, n=9, sum(n - 1, m + 1)=20] [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=10, \old(n)=10, m=10, n=10, sum(n - 1, m + 1)=20] [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=9, \old(n)=11, m=9, n=11, sum(n - 1, m + 1)=20] [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=8, \old(n)=12, m=8, n=12, sum(n - 1, m + 1)=20] [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=7, \old(n)=13, m=7, n=13, sum(n - 1, m + 1)=20] [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=6, \old(n)=14, m=6, n=14, sum(n - 1, m + 1)=20] [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=5, \old(n)=15, m=5, n=15, sum(n - 1, m + 1)=20] [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=4, \old(n)=16, m=4, n=16, sum(n - 1, m + 1)=20] [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=3, \old(n)=17, m=3, n=17, sum(n - 1, m + 1)=20] [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=2, \old(n)=18, m=2, n=18, sum(n - 1, m + 1)=20] [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=1, \old(n)=19, m=1, n=19, sum(n - 1, m + 1)=20] [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=0, \old(n)=20, m=0, n=20, sum(n - 1, m + 1)=20] [L7] return sum(n - 1, m + 1); [L14] RET, EXPR sum(a, b) [L14] int result = sum(a, b); [L15] COND TRUE result == a + b [L16] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 15 locations, 1 error locations. Result: UNSAFE, OverallTime: 16.9s, OverallIterations: 21, TraceHistogramMax: 21, AutomataDifference: 3.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 162 SDtfs, 730 SDslu, 984 SDs, 0 SdLazy, 1203 SolverSat, 152 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2212 GetRequests, 1693 SyntacticMatches, 0 SemanticMatches, 519 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2660 ImplicationChecksByTransitivity, 5.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=71occurred in iteration=20, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 20 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.7s SatisfiabilityAnalysisTime, 7.6s InterpolantComputationTime, 2760 NumberOfCodeBlocks, 2760 NumberOfCodeBlocksAsserted, 142 NumberOfCheckSat, 2592 ConstructedInterpolants, 0 QuantifiedInterpolants, 579952 SizeOfPredicates, 228 NumberOfNonLiveVariables, 3971 ConjunctsInSsa, 456 ConjunctsInUnsatCore, 39 InterpolantComputations, 1 PerfectInterpolantSequences, 7600/15200 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...