./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive-simple/id2_i5_o5-2.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_58f97654-d7e9-47c4-a0f7-5bea425763dd/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_58f97654-d7e9-47c4-a0f7-5bea425763dd/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_58f97654-d7e9-47c4-a0f7-5bea425763dd/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_58f97654-d7e9-47c4-a0f7-5bea425763dd/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive-simple/id2_i5_o5-2.c -s /tmp/vcloud-vcloud-master/worker/working_dir_58f97654-d7e9-47c4-a0f7-5bea425763dd/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_58f97654-d7e9-47c4-a0f7-5bea425763dd/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 9448a6696b4991e038dda55623feb6ffc9366da0 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.24-cad4683 [2019-10-22 08:59:14,417 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-22 08:59:14,419 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-22 08:59:14,429 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-22 08:59:14,429 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-22 08:59:14,430 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-22 08:59:14,432 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-22 08:59:14,433 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-22 08:59:14,435 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-22 08:59:14,436 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-22 08:59:14,437 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-22 08:59:14,438 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-22 08:59:14,438 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-22 08:59:14,441 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-22 08:59:14,441 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-22 08:59:14,442 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-22 08:59:14,443 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-22 08:59:14,444 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-22 08:59:14,445 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-22 08:59:14,454 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-22 08:59:14,455 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-22 08:59:14,456 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-22 08:59:14,457 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-22 08:59:14,457 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-22 08:59:14,461 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-22 08:59:14,462 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-22 08:59:14,462 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-22 08:59:14,463 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-22 08:59:14,463 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-22 08:59:14,464 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-22 08:59:14,464 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-22 08:59:14,464 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-22 08:59:14,465 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-22 08:59:14,465 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-22 08:59:14,468 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-22 08:59:14,468 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-22 08:59:14,469 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-22 08:59:14,469 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-22 08:59:14,469 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-22 08:59:14,470 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-22 08:59:14,470 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-22 08:59:14,471 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_58f97654-d7e9-47c4-a0f7-5bea425763dd/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-22 08:59:14,495 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-22 08:59:14,495 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-22 08:59:14,496 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-22 08:59:14,496 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-22 08:59:14,496 INFO L138 SettingsManager]: * Use SBE=true [2019-10-22 08:59:14,497 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-22 08:59:14,497 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-22 08:59:14,497 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-22 08:59:14,497 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-22 08:59:14,497 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-22 08:59:14,497 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-22 08:59:14,498 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-22 08:59:14,498 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-22 08:59:14,498 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-22 08:59:14,498 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-22 08:59:14,498 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-22 08:59:14,498 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-22 08:59:14,499 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-22 08:59:14,499 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-22 08:59:14,499 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-22 08:59:14,499 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-22 08:59:14,499 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-22 08:59:14,499 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-22 08:59:14,500 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-22 08:59:14,500 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-22 08:59:14,500 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-22 08:59:14,500 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-22 08:59:14,500 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-22 08:59:14,500 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_58f97654-d7e9-47c4-a0f7-5bea425763dd/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 -> 9448a6696b4991e038dda55623feb6ffc9366da0 [2019-10-22 08:59:14,536 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-22 08:59:14,550 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-22 08:59:14,552 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-22 08:59:14,554 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-22 08:59:14,554 INFO L275 PluginConnector]: CDTParser initialized [2019-10-22 08:59:14,555 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_58f97654-d7e9-47c4-a0f7-5bea425763dd/bin/uautomizer/../../sv-benchmarks/c/recursive-simple/id2_i5_o5-2.c [2019-10-22 08:59:14,609 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_58f97654-d7e9-47c4-a0f7-5bea425763dd/bin/uautomizer/data/38056a2c5/9611a7d34c54473090bc4c007975fad5/FLAG7a51b7e36 [2019-10-22 08:59:14,997 INFO L306 CDTParser]: Found 1 translation units. [2019-10-22 08:59:14,997 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_58f97654-d7e9-47c4-a0f7-5bea425763dd/sv-benchmarks/c/recursive-simple/id2_i5_o5-2.c [2019-10-22 08:59:15,001 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_58f97654-d7e9-47c4-a0f7-5bea425763dd/bin/uautomizer/data/38056a2c5/9611a7d34c54473090bc4c007975fad5/FLAG7a51b7e36 [2019-10-22 08:59:15,012 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_58f97654-d7e9-47c4-a0f7-5bea425763dd/bin/uautomizer/data/38056a2c5/9611a7d34c54473090bc4c007975fad5 [2019-10-22 08:59:15,014 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-22 08:59:15,015 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-10-22 08:59:15,016 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-22 08:59:15,017 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-22 08:59:15,023 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-22 08:59:15,024 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 08:59:15" (1/1) ... [2019-10-22 08:59:15,026 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3cd3bf3c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:59:15, skipping insertion in model container [2019-10-22 08:59:15,027 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 08:59:15" (1/1) ... [2019-10-22 08:59:15,034 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-22 08:59:15,048 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-22 08:59:15,211 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-22 08:59:15,215 INFO L188 MainTranslator]: Completed pre-run [2019-10-22 08:59:15,312 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-22 08:59:15,328 INFO L192 MainTranslator]: Completed translation [2019-10-22 08:59:15,329 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:59:15 WrapperNode [2019-10-22 08:59:15,329 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-22 08:59:15,330 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-10-22 08:59:15,330 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-10-22 08:59:15,330 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-10-22 08:59:15,337 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:59:15" (1/1) ... [2019-10-22 08:59:15,342 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:59:15" (1/1) ... [2019-10-22 08:59:15,358 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-10-22 08:59:15,358 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-22 08:59:15,358 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-22 08:59:15,358 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-22 08:59:15,367 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:59:15" (1/1) ... [2019-10-22 08:59:15,367 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:59:15" (1/1) ... [2019-10-22 08:59:15,368 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:59:15" (1/1) ... [2019-10-22 08:59:15,368 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:59:15" (1/1) ... [2019-10-22 08:59:15,372 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:59:15" (1/1) ... [2019-10-22 08:59:15,374 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:59:15" (1/1) ... [2019-10-22 08:59:15,375 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:59:15" (1/1) ... [2019-10-22 08:59:15,376 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-22 08:59:15,380 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-22 08:59:15,380 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-22 08:59:15,380 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-22 08:59:15,381 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:59:15" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_58f97654-d7e9-47c4-a0f7-5bea425763dd/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 08:59:15,421 INFO L130 BoogieDeclarations]: Found specification of procedure id2 [2019-10-22 08:59:15,421 INFO L138 BoogieDeclarations]: Found implementation of procedure id2 [2019-10-22 08:59:15,421 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-22 08:59:15,421 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-22 08:59:15,421 INFO L130 BoogieDeclarations]: Found specification of procedure id [2019-10-22 08:59:15,422 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2019-10-22 08:59:15,551 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-22 08:59:15,552 INFO L284 CfgBuilder]: Removed 4 assume(true) statements. [2019-10-22 08:59:15,553 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 08:59:15 BoogieIcfgContainer [2019-10-22 08:59:15,553 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-22 08:59:15,553 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-22 08:59:15,554 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-22 08:59:15,559 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-22 08:59:15,559 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.10 08:59:15" (1/3) ... [2019-10-22 08:59:15,560 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ec944ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 08:59:15, skipping insertion in model container [2019-10-22 08:59:15,560 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:59:15" (2/3) ... [2019-10-22 08:59:15,560 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ec944ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 08:59:15, skipping insertion in model container [2019-10-22 08:59:15,561 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 08:59:15" (3/3) ... [2019-10-22 08:59:15,563 INFO L109 eAbstractionObserver]: Analyzing ICFG id2_i5_o5-2.c [2019-10-22 08:59:15,572 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-22 08:59:15,582 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-22 08:59:15,594 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-22 08:59:15,625 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-22 08:59:15,625 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-22 08:59:15,625 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-22 08:59:15,625 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-22 08:59:15,625 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-22 08:59:15,625 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-22 08:59:15,625 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-22 08:59:15,626 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-22 08:59:15,653 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2019-10-22 08:59:15,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-10-22 08:59:15,662 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 08:59:15,663 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 08:59:15,664 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 08:59:15,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:59:15,672 INFO L82 PathProgramCache]: Analyzing trace with hash 2105267373, now seen corresponding path program 1 times [2019-10-22 08:59:15,680 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:59:15,680 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767905260] [2019-10-22 08:59:15,680 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:59:15,681 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:59:15,681 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:59:15,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:59:15,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:59:15,850 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 08:59:15,851 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767905260] [2019-10-22 08:59:15,852 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-22 08:59:15,852 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-22 08:59:15,852 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427763992] [2019-10-22 08:59:15,856 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-22 08:59:15,857 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 08:59:15,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-22 08:59:15,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-22 08:59:15,872 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 5 states. [2019-10-22 08:59:15,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 08:59:15,937 INFO L93 Difference]: Finished difference Result 30 states and 34 transitions. [2019-10-22 08:59:15,937 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-22 08:59:15,938 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2019-10-22 08:59:15,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 08:59:15,948 INFO L225 Difference]: With dead ends: 30 [2019-10-22 08:59:15,948 INFO L226 Difference]: Without dead ends: 20 [2019-10-22 08:59:15,951 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-22 08:59:15,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-10-22 08:59:15,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2019-10-22 08:59:15,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-10-22 08:59:15,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2019-10-22 08:59:15,992 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 9 [2019-10-22 08:59:15,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 08:59:15,992 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2019-10-22 08:59:15,993 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-22 08:59:15,993 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2019-10-22 08:59:15,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-10-22 08:59:15,994 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 08:59:15,994 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 08:59:15,998 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 08:59:15,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:59:15,999 INFO L82 PathProgramCache]: Analyzing trace with hash -131148366, now seen corresponding path program 1 times [2019-10-22 08:59:15,999 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:59:15,999 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513418537] [2019-10-22 08:59:15,999 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:59:15,999 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:59:16,000 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:59:16,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:59:16,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:59:16,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:59:16,108 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 08:59:16,108 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513418537] [2019-10-22 08:59:16,108 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-22 08:59:16,109 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-10-22 08:59:16,109 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925127174] [2019-10-22 08:59:16,110 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-22 08:59:16,118 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 08:59:16,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-22 08:59:16,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-10-22 08:59:16,120 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand 7 states. [2019-10-22 08:59:16,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 08:59:16,219 INFO L93 Difference]: Finished difference Result 29 states and 31 transitions. [2019-10-22 08:59:16,219 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-22 08:59:16,219 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 15 [2019-10-22 08:59:16,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 08:59:16,220 INFO L225 Difference]: With dead ends: 29 [2019-10-22 08:59:16,220 INFO L226 Difference]: Without dead ends: 25 [2019-10-22 08:59:16,221 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2019-10-22 08:59:16,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2019-10-22 08:59:16,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 23. [2019-10-22 08:59:16,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-10-22 08:59:16,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2019-10-22 08:59:16,227 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 15 [2019-10-22 08:59:16,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 08:59:16,228 INFO L462 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2019-10-22 08:59:16,228 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-22 08:59:16,228 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2019-10-22 08:59:16,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-10-22 08:59:16,229 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 08:59:16,229 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 08:59:16,229 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 08:59:16,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:59:16,230 INFO L82 PathProgramCache]: Analyzing trace with hash -132605643, now seen corresponding path program 1 times [2019-10-22 08:59:16,230 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:59:16,230 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757448432] [2019-10-22 08:59:16,230 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:59:16,230 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:59:16,230 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:59:16,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:59:16,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:59:16,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:59:16,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:59:16,356 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 08:59:16,356 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757448432] [2019-10-22 08:59:16,356 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1077278915] [2019-10-22 08:59:16,357 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_58f97654-d7e9-47c4-a0f7-5bea425763dd/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 08:59:16,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:59:16,407 INFO L256 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-22 08:59:16,413 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 08:59:16,508 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 08:59:16,508 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 08:59:16,508 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2019-10-22 08:59:16,508 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771467548] [2019-10-22 08:59:16,509 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-22 08:59:16,509 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 08:59:16,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-22 08:59:16,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2019-10-22 08:59:16,510 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand 11 states. [2019-10-22 08:59:16,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 08:59:16,609 INFO L93 Difference]: Finished difference Result 35 states and 37 transitions. [2019-10-22 08:59:16,610 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-22 08:59:16,610 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 21 [2019-10-22 08:59:16,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 08:59:16,611 INFO L225 Difference]: With dead ends: 35 [2019-10-22 08:59:16,611 INFO L226 Difference]: Without dead ends: 31 [2019-10-22 08:59:16,612 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2019-10-22 08:59:16,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2019-10-22 08:59:16,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 26. [2019-10-22 08:59:16,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-10-22 08:59:16,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2019-10-22 08:59:16,617 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 21 [2019-10-22 08:59:16,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 08:59:16,618 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2019-10-22 08:59:16,618 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-22 08:59:16,618 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2019-10-22 08:59:16,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-10-22 08:59:16,619 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 08:59:16,619 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 08:59:16,819 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 08:59:16,820 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 08:59:16,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:59:16,820 INFO L82 PathProgramCache]: Analyzing trace with hash -614490246, now seen corresponding path program 1 times [2019-10-22 08:59:16,820 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:59:16,820 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773796221] [2019-10-22 08:59:16,821 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:59:16,821 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:59:16,821 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:59:16,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:59:16,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:59:16,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:59:16,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:59:16,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:59:17,024 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-22 08:59:17,024 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773796221] [2019-10-22 08:59:17,025 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1079354903] [2019-10-22 08:59:17,025 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_58f97654-d7e9-47c4-a0f7-5bea425763dd/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 08:59:17,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:59:17,066 INFO L256 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2019-10-22 08:59:17,068 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 08:59:17,125 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-22 08:59:17,125 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 08:59:17,125 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2019-10-22 08:59:17,126 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809750044] [2019-10-22 08:59:17,126 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-22 08:59:17,126 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 08:59:17,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-22 08:59:17,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2019-10-22 08:59:17,127 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand 12 states. [2019-10-22 08:59:17,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 08:59:17,257 INFO L93 Difference]: Finished difference Result 41 states and 43 transitions. [2019-10-22 08:59:17,259 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-22 08:59:17,259 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 27 [2019-10-22 08:59:17,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 08:59:17,260 INFO L225 Difference]: With dead ends: 41 [2019-10-22 08:59:17,260 INFO L226 Difference]: Without dead ends: 37 [2019-10-22 08:59:17,261 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2019-10-22 08:59:17,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2019-10-22 08:59:17,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 29. [2019-10-22 08:59:17,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-10-22 08:59:17,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2019-10-22 08:59:17,269 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 27 [2019-10-22 08:59:17,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 08:59:17,269 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2019-10-22 08:59:17,269 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-22 08:59:17,270 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2019-10-22 08:59:17,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2019-10-22 08:59:17,271 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 08:59:17,271 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 08:59:17,471 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 08:59:17,472 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 08:59:17,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:59:17,472 INFO L82 PathProgramCache]: Analyzing trace with hash -2127867459, now seen corresponding path program 2 times [2019-10-22 08:59:17,472 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:59:17,472 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771261592] [2019-10-22 08:59:17,472 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:59:17,473 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:59:17,473 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:59:17,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:59:17,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:59:17,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:59:17,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:59:17,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:59:17,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:59:17,638 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-22 08:59:17,638 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771261592] [2019-10-22 08:59:17,639 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1896319412] [2019-10-22 08:59:17,639 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_58f97654-d7e9-47c4-a0f7-5bea425763dd/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 08:59:17,672 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-22 08:59:17,673 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 08:59:17,673 INFO L256 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 12 conjunts are in the unsatisfiable core [2019-10-22 08:59:17,675 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 08:59:17,721 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-22 08:59:17,721 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 08:59:17,721 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2019-10-22 08:59:17,722 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781078293] [2019-10-22 08:59:17,722 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-10-22 08:59:17,723 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 08:59:17,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-10-22 08:59:17,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2019-10-22 08:59:17,723 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand 13 states. [2019-10-22 08:59:17,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 08:59:17,836 INFO L93 Difference]: Finished difference Result 47 states and 49 transitions. [2019-10-22 08:59:17,836 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-22 08:59:17,836 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 33 [2019-10-22 08:59:17,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 08:59:17,838 INFO L225 Difference]: With dead ends: 47 [2019-10-22 08:59:17,838 INFO L226 Difference]: Without dead ends: 43 [2019-10-22 08:59:17,838 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2019-10-22 08:59:17,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2019-10-22 08:59:17,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 32. [2019-10-22 08:59:17,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-10-22 08:59:17,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2019-10-22 08:59:17,845 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 33 [2019-10-22 08:59:17,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 08:59:17,845 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2019-10-22 08:59:17,846 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-10-22 08:59:17,846 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2019-10-22 08:59:17,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-10-22 08:59:17,847 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 08:59:17,847 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 08:59:18,048 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 08:59:18,048 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 08:59:18,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:59:18,049 INFO L82 PathProgramCache]: Analyzing trace with hash -1002836670, now seen corresponding path program 2 times [2019-10-22 08:59:18,049 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:59:18,049 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307676925] [2019-10-22 08:59:18,049 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:59:18,049 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:59:18,050 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:59:18,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:59:18,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:59:18,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:59:18,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:59:18,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:59:18,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:59:18,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:59:18,384 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-22 08:59:18,385 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307676925] [2019-10-22 08:59:18,385 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1241064337] [2019-10-22 08:59:18,385 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_58f97654-d7e9-47c4-a0f7-5bea425763dd/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 08:59:18,422 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-22 08:59:18,422 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 08:59:18,423 INFO L256 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 27 conjunts are in the unsatisfiable core [2019-10-22 08:59:18,426 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 08:59:18,450 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-22 08:59:18,451 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 08:59:18,451 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2019-10-22 08:59:18,451 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660652914] [2019-10-22 08:59:18,452 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-10-22 08:59:18,452 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 08:59:18,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-10-22 08:59:18,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2019-10-22 08:59:18,452 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand 15 states. [2019-10-22 08:59:18,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 08:59:18,535 INFO L93 Difference]: Finished difference Result 53 states and 55 transitions. [2019-10-22 08:59:18,536 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-10-22 08:59:18,536 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 39 [2019-10-22 08:59:18,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 08:59:18,537 INFO L225 Difference]: With dead ends: 53 [2019-10-22 08:59:18,537 INFO L226 Difference]: Without dead ends: 49 [2019-10-22 08:59:18,538 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2019-10-22 08:59:18,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2019-10-22 08:59:18,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 35. [2019-10-22 08:59:18,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-10-22 08:59:18,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2019-10-22 08:59:18,543 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 39 [2019-10-22 08:59:18,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 08:59:18,544 INFO L462 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2019-10-22 08:59:18,544 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-10-22 08:59:18,544 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2019-10-22 08:59:18,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2019-10-22 08:59:18,545 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 08:59:18,545 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 08:59:18,745 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 08:59:18,746 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 08:59:18,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:59:18,746 INFO L82 PathProgramCache]: Analyzing trace with hash 688258629, now seen corresponding path program 3 times [2019-10-22 08:59:18,746 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:59:18,747 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674962646] [2019-10-22 08:59:18,747 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:59:18,747 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:59:18,747 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:59:18,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:59:18,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:59:18,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:59:18,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:59:18,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:59:18,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:59:18,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:59:18,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:59:18,989 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 18 proven. 6 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2019-10-22 08:59:18,989 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674962646] [2019-10-22 08:59:18,989 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1385624025] [2019-10-22 08:59:18,990 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_58f97654-d7e9-47c4-a0f7-5bea425763dd/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 08:59:19,033 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-10-22 08:59:19,033 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 08:59:19,034 INFO L256 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 16 conjunts are in the unsatisfiable core [2019-10-22 08:59:19,037 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 08:59:19,115 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2019-10-22 08:59:19,116 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-22 08:59:19,116 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [12] total 15 [2019-10-22 08:59:19,116 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44038406] [2019-10-22 08:59:19,117 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-22 08:59:19,117 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 08:59:19,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-22 08:59:19,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2019-10-22 08:59:19,117 INFO L87 Difference]: Start difference. First operand 35 states and 37 transitions. Second operand 12 states. [2019-10-22 08:59:19,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 08:59:19,276 INFO L93 Difference]: Finished difference Result 59 states and 61 transitions. [2019-10-22 08:59:19,276 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-22 08:59:19,276 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 45 [2019-10-22 08:59:19,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 08:59:19,277 INFO L225 Difference]: With dead ends: 59 [2019-10-22 08:59:19,277 INFO L226 Difference]: Without dead ends: 35 [2019-10-22 08:59:19,278 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=85, Invalid=377, Unknown=0, NotChecked=0, Total=462 [2019-10-22 08:59:19,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-10-22 08:59:19,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2019-10-22 08:59:19,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-10-22 08:59:19,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2019-10-22 08:59:19,283 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 45 [2019-10-22 08:59:19,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 08:59:19,283 INFO L462 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2019-10-22 08:59:19,284 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-22 08:59:19,284 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2019-10-22 08:59:19,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2019-10-22 08:59:19,285 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 08:59:19,285 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 08:59:19,485 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 08:59:19,486 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 08:59:19,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:59:19,486 INFO L82 PathProgramCache]: Analyzing trace with hash -77349110, now seen corresponding path program 3 times [2019-10-22 08:59:19,486 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:59:19,486 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971038199] [2019-10-22 08:59:19,487 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:59:19,487 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:59:19,487 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:59:19,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:59:19,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:59:19,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:59:19,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:59:19,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:59:19,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:59:19,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:59:19,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:59:19,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:59:19,668 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 27 proven. 6 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2019-10-22 08:59:19,669 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971038199] [2019-10-22 08:59:19,669 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [981513637] [2019-10-22 08:59:19,669 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_58f97654-d7e9-47c4-a0f7-5bea425763dd/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 08:59:19,704 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-10-22 08:59:19,704 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 08:59:19,705 INFO L256 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 18 conjunts are in the unsatisfiable core [2019-10-22 08:59:19,707 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 08:59:19,769 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2019-10-22 08:59:19,769 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-22 08:59:19,769 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [13] total 16 [2019-10-22 08:59:19,770 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205220149] [2019-10-22 08:59:19,773 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-10-22 08:59:19,773 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 08:59:19,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-10-22 08:59:19,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2019-10-22 08:59:19,774 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand 13 states. [2019-10-22 08:59:19,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 08:59:19,970 INFO L93 Difference]: Finished difference Result 35 states and 36 transitions. [2019-10-22 08:59:19,971 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-22 08:59:19,971 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 51 [2019-10-22 08:59:19,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 08:59:19,971 INFO L225 Difference]: With dead ends: 35 [2019-10-22 08:59:19,971 INFO L226 Difference]: Without dead ends: 0 [2019-10-22 08:59:19,972 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=100, Invalid=452, Unknown=0, NotChecked=0, Total=552 [2019-10-22 08:59:19,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-10-22 08:59:19,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-10-22 08:59:19,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-10-22 08:59:19,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-10-22 08:59:19,973 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 51 [2019-10-22 08:59:19,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 08:59:19,973 INFO L462 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-10-22 08:59:19,973 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-10-22 08:59:19,973 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-10-22 08:59:19,973 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-10-22 08:59:20,173 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 08:59:20,177 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2019-10-22 08:59:20,207 INFO L439 ceAbstractionStarter]: At program point L14(line 14) the Hoare annotation is: (= id2_~x |id2_#in~x|) [2019-10-22 08:59:20,207 INFO L443 ceAbstractionStarter]: For program point L13(line 13) no Hoare annotation was computed. [2019-10-22 08:59:20,207 INFO L443 ceAbstractionStarter]: For program point L14-1(line 14) no Hoare annotation was computed. [2019-10-22 08:59:20,208 INFO L443 ceAbstractionStarter]: For program point id2EXIT(lines 12 15) no Hoare annotation was computed. [2019-10-22 08:59:20,208 INFO L446 ceAbstractionStarter]: At program point id2ENTRY(lines 12 15) the Hoare annotation is: true [2019-10-22 08:59:20,208 INFO L443 ceAbstractionStarter]: For program point id2FINAL(lines 12 15) no Hoare annotation was computed. [2019-10-22 08:59:20,208 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2019-10-22 08:59:20,208 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 21) no Hoare annotation was computed. [2019-10-22 08:59:20,208 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2019-10-22 08:59:20,208 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2019-10-22 08:59:20,208 INFO L443 ceAbstractionStarter]: For program point L21(line 21) no Hoare annotation was computed. [2019-10-22 08:59:20,208 INFO L443 ceAbstractionStarter]: For program point L20(lines 20 22) no Hoare annotation was computed. [2019-10-22 08:59:20,208 INFO L439 ceAbstractionStarter]: At program point L19(line 19) the Hoare annotation is: (and (<= 5 ULTIMATE.start_main_~input~0) (<= ULTIMATE.start_main_~input~0 5)) [2019-10-22 08:59:20,208 INFO L443 ceAbstractionStarter]: For program point L19-1(line 19) no Hoare annotation was computed. [2019-10-22 08:59:20,208 INFO L443 ceAbstractionStarter]: For program point L17(lines 17 23) no Hoare annotation was computed. [2019-10-22 08:59:20,209 INFO L443 ceAbstractionStarter]: For program point idFINAL(lines 7 10) no Hoare annotation was computed. [2019-10-22 08:59:20,209 INFO L443 ceAbstractionStarter]: For program point idEXIT(lines 7 10) no Hoare annotation was computed. [2019-10-22 08:59:20,209 INFO L439 ceAbstractionStarter]: At program point L9(line 9) the Hoare annotation is: (= |id_#in~x| id_~x) [2019-10-22 08:59:20,209 INFO L443 ceAbstractionStarter]: For program point L8(line 8) no Hoare annotation was computed. [2019-10-22 08:59:20,209 INFO L443 ceAbstractionStarter]: For program point L9-1(line 9) no Hoare annotation was computed. [2019-10-22 08:59:20,209 INFO L446 ceAbstractionStarter]: At program point idENTRY(lines 7 10) the Hoare annotation is: true [2019-10-22 08:59:20,212 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.10 08:59:20 BoogieIcfgContainer [2019-10-22 08:59:20,212 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-10-22 08:59:20,212 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-10-22 08:59:20,212 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-10-22 08:59:20,212 INFO L275 PluginConnector]: Witness Printer initialized [2019-10-22 08:59:20,213 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 08:59:15" (3/4) ... [2019-10-22 08:59:20,217 INFO L137 WitnessPrinter]: Generating witness for correct program [2019-10-22 08:59:20,224 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure id2 [2019-10-22 08:59:20,224 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure id [2019-10-22 08:59:20,228 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2019-10-22 08:59:20,228 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2019-10-22 08:59:20,270 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_58f97654-d7e9-47c4-a0f7-5bea425763dd/bin/uautomizer/witness.graphml [2019-10-22 08:59:20,270 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-10-22 08:59:20,272 INFO L168 Benchmark]: Toolchain (without parser) took 5256.05 ms. Allocated memory was 1.0 GB in the beginning and 1.3 GB in the end (delta: 223.9 MB). Free memory was 943.4 MB in the beginning and 1.1 GB in the end (delta: -126.3 MB). Peak memory consumption was 97.6 MB. Max. memory is 11.5 GB. [2019-10-22 08:59:20,272 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 1.0 GB. Free memory is still 967.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-10-22 08:59:20,273 INFO L168 Benchmark]: CACSL2BoogieTranslator took 312.75 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 167.8 MB). Free memory was 943.4 MB in the beginning and 1.2 GB in the end (delta: -219.1 MB). Peak memory consumption was 23.3 MB. Max. memory is 11.5 GB. [2019-10-22 08:59:20,273 INFO L168 Benchmark]: Boogie Procedure Inliner took 28.24 ms. Allocated memory is still 1.2 GB. Free memory is still 1.2 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-10-22 08:59:20,273 INFO L168 Benchmark]: Boogie Preprocessor took 21.74 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 3.4 MB). Peak memory consumption was 3.4 MB. Max. memory is 11.5 GB. [2019-10-22 08:59:20,273 INFO L168 Benchmark]: RCFGBuilder took 172.78 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.1 GB in the end (delta: 14.5 MB). Peak memory consumption was 14.5 MB. Max. memory is 11.5 GB. [2019-10-22 08:59:20,274 INFO L168 Benchmark]: TraceAbstraction took 4658.37 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 56.1 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 58.3 MB). Peak memory consumption was 114.4 MB. Max. memory is 11.5 GB. [2019-10-22 08:59:20,274 INFO L168 Benchmark]: Witness Printer took 58.10 ms. Allocated memory is still 1.3 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 9.9 MB). Peak memory consumption was 9.9 MB. Max. memory is 11.5 GB. [2019-10-22 08:59:20,276 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 1.0 GB. Free memory is still 967.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 312.75 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 167.8 MB). Free memory was 943.4 MB in the beginning and 1.2 GB in the end (delta: -219.1 MB). Peak memory consumption was 23.3 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 28.24 ms. Allocated memory is still 1.2 GB. Free memory is still 1.2 GB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 21.74 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 3.4 MB). Peak memory consumption was 3.4 MB. Max. memory is 11.5 GB. * RCFGBuilder took 172.78 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.1 GB in the end (delta: 14.5 MB). Peak memory consumption was 14.5 MB. Max. memory is 11.5 GB. * TraceAbstraction took 4658.37 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 56.1 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 58.3 MB). Peak memory consumption was 114.4 MB. Max. memory is 11.5 GB. * Witness Printer took 58.10 ms. Allocated memory is still 1.3 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 9.9 MB). Peak memory consumption was 9.9 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 21]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 21 locations, 1 error locations. Result: SAFE, OverallTime: 4.5s, OverallIterations: 8, TraceHistogramMax: 4, AutomataDifference: 0.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 146 SDtfs, 104 SDslu, 919 SDs, 0 SdLazy, 546 SolverSat, 15 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 371 GetRequests, 262 SyntacticMatches, 1 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 1.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=35occurred in iteration=6, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 8 MinimizatonAttempts, 40 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 5 LocationsWithAnnotation, 7 PreInvPairs, 7 NumberOfFragments, 15 HoareAnnotationTreeSize, 7 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 5 FomulaSimplificationsInter, 8 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.7s InterpolantComputationTime, 456 NumberOfCodeBlocks, 456 NumberOfCodeBlocksAsserted, 22 NumberOfCheckSat, 442 ConstructedInterpolants, 0 QuantifiedInterpolants, 44240 SizeOfPredicates, 33 NumberOfNonLiveVariables, 516 ConjunctsInSsa, 91 ConjunctsInUnsatCore, 14 InterpolantComputations, 4 PerfectInterpolantSequences, 282/360 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 correct! Received shutdown request...