./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive-simple/id2_b5_o10.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_b402491d-12e4-4ca8-a7c3-18ab430d075e/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_b402491d-12e4-4ca8-a7c3-18ab430d075e/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_b402491d-12e4-4ca8-a7c3-18ab430d075e/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_b402491d-12e4-4ca8-a7c3-18ab430d075e/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive-simple/id2_b5_o10.c -s /tmp/vcloud-vcloud-master/worker/working_dir_b402491d-12e4-4ca8-a7c3-18ab430d075e/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_b402491d-12e4-4ca8-a7c3-18ab430d075e/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 6f330f622534898bf170bbd5a7ac37bee3deb574 .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. 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 08:57:31,395 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-22 08:57:31,396 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-22 08:57:31,407 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-22 08:57:31,407 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-22 08:57:31,408 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-22 08:57:31,409 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-22 08:57:31,410 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-22 08:57:31,412 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-22 08:57:31,414 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-22 08:57:31,415 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-22 08:57:31,416 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-22 08:57:31,416 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-22 08:57:31,417 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-22 08:57:31,418 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-22 08:57:31,419 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-22 08:57:31,419 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-22 08:57:31,427 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-22 08:57:31,429 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-22 08:57:31,430 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-22 08:57:31,431 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-22 08:57:31,435 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-22 08:57:31,436 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-22 08:57:31,436 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-22 08:57:31,438 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-22 08:57:31,438 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-22 08:57:31,438 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-22 08:57:31,439 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-22 08:57:31,439 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-22 08:57:31,443 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-22 08:57:31,443 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-22 08:57:31,444 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-22 08:57:31,445 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-22 08:57:31,445 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-22 08:57:31,447 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-22 08:57:31,448 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-22 08:57:31,449 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-22 08:57:31,449 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-22 08:57:31,450 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-22 08:57:31,450 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-22 08:57:31,451 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-22 08:57:31,451 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_b402491d-12e4-4ca8-a7c3-18ab430d075e/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-22 08:57:31,465 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-22 08:57:31,475 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-22 08:57:31,476 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-22 08:57:31,476 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-22 08:57:31,476 INFO L138 SettingsManager]: * Use SBE=true [2019-10-22 08:57:31,476 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-22 08:57:31,477 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-22 08:57:31,477 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-22 08:57:31,477 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-22 08:57:31,477 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-22 08:57:31,477 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-22 08:57:31,477 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-22 08:57:31,478 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-22 08:57:31,478 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-22 08:57:31,478 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-22 08:57:31,478 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-22 08:57:31,478 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-22 08:57:31,478 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-22 08:57:31,479 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-22 08:57:31,479 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-22 08:57:31,479 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-22 08:57:31,479 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-22 08:57:31,479 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-22 08:57:31,479 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-22 08:57:31,480 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-22 08:57:31,480 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-22 08:57:31,481 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-22 08:57:31,481 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-22 08:57:31,481 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_b402491d-12e4-4ca8-a7c3-18ab430d075e/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 -> 6f330f622534898bf170bbd5a7ac37bee3deb574 [2019-10-22 08:57:31,514 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-22 08:57:31,525 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-22 08:57:31,528 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-22 08:57:31,529 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-22 08:57:31,529 INFO L275 PluginConnector]: CDTParser initialized [2019-10-22 08:57:31,530 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_b402491d-12e4-4ca8-a7c3-18ab430d075e/bin/uautomizer/../../sv-benchmarks/c/recursive-simple/id2_b5_o10.c [2019-10-22 08:57:31,581 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_b402491d-12e4-4ca8-a7c3-18ab430d075e/bin/uautomizer/data/9841f8b0a/0d70853cd74648238e43a1bcbd7bdcf9/FLAGbd0b05d11 [2019-10-22 08:57:31,967 INFO L306 CDTParser]: Found 1 translation units. [2019-10-22 08:57:31,967 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_b402491d-12e4-4ca8-a7c3-18ab430d075e/sv-benchmarks/c/recursive-simple/id2_b5_o10.c [2019-10-22 08:57:31,971 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_b402491d-12e4-4ca8-a7c3-18ab430d075e/bin/uautomizer/data/9841f8b0a/0d70853cd74648238e43a1bcbd7bdcf9/FLAGbd0b05d11 [2019-10-22 08:57:32,383 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_b402491d-12e4-4ca8-a7c3-18ab430d075e/bin/uautomizer/data/9841f8b0a/0d70853cd74648238e43a1bcbd7bdcf9 [2019-10-22 08:57:32,385 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-22 08:57:32,386 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-10-22 08:57:32,387 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-22 08:57:32,387 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-22 08:57:32,391 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-22 08:57:32,392 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 08:57:32" (1/1) ... [2019-10-22 08:57:32,394 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@420a83e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:57:32, skipping insertion in model container [2019-10-22 08:57:32,394 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 08:57:32" (1/1) ... [2019-10-22 08:57:32,402 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-22 08:57:32,417 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-22 08:57:32,614 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-22 08:57:32,618 INFO L188 MainTranslator]: Completed pre-run [2019-10-22 08:57:32,740 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-22 08:57:32,757 INFO L192 MainTranslator]: Completed translation [2019-10-22 08:57:32,757 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:57:32 WrapperNode [2019-10-22 08:57:32,757 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-22 08:57:32,758 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-10-22 08:57:32,758 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-10-22 08:57:32,758 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-10-22 08:57:32,767 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:57:32" (1/1) ... [2019-10-22 08:57:32,772 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:57:32" (1/1) ... [2019-10-22 08:57:32,788 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-10-22 08:57:32,789 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-22 08:57:32,789 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-22 08:57:32,789 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-22 08:57:32,798 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:57:32" (1/1) ... [2019-10-22 08:57:32,798 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:57:32" (1/1) ... [2019-10-22 08:57:32,799 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:57:32" (1/1) ... [2019-10-22 08:57:32,799 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:57:32" (1/1) ... [2019-10-22 08:57:32,801 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:57:32" (1/1) ... [2019-10-22 08:57:32,803 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:57:32" (1/1) ... [2019-10-22 08:57:32,804 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:57:32" (1/1) ... [2019-10-22 08:57:32,805 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-22 08:57:32,807 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-22 08:57:32,808 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-22 08:57:32,808 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-22 08:57:32,809 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:57:32" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b402491d-12e4-4ca8-a7c3-18ab430d075e/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 08:57:32,851 INFO L130 BoogieDeclarations]: Found specification of procedure id2 [2019-10-22 08:57:32,852 INFO L138 BoogieDeclarations]: Found implementation of procedure id2 [2019-10-22 08:57:32,852 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-22 08:57:32,852 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-22 08:57:32,852 INFO L130 BoogieDeclarations]: Found specification of procedure id [2019-10-22 08:57:32,852 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2019-10-22 08:57:32,989 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-22 08:57:32,990 INFO L284 CfgBuilder]: Removed 4 assume(true) statements. [2019-10-22 08:57:32,991 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 08:57:32 BoogieIcfgContainer [2019-10-22 08:57:32,991 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-22 08:57:32,992 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-22 08:57:32,992 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-22 08:57:32,995 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-22 08:57:32,995 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.10 08:57:32" (1/3) ... [2019-10-22 08:57:32,996 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f78635a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 08:57:32, skipping insertion in model container [2019-10-22 08:57:32,996 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:57:32" (2/3) ... [2019-10-22 08:57:32,997 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f78635a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 08:57:32, skipping insertion in model container [2019-10-22 08:57:32,997 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 08:57:32" (3/3) ... [2019-10-22 08:57:32,998 INFO L109 eAbstractionObserver]: Analyzing ICFG id2_b5_o10.c [2019-10-22 08:57:33,009 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-22 08:57:33,016 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-22 08:57:33,027 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-22 08:57:33,051 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-22 08:57:33,051 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-22 08:57:33,051 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-22 08:57:33,051 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-22 08:57:33,051 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-22 08:57:33,052 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-22 08:57:33,052 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-22 08:57:33,052 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-22 08:57:33,069 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states. [2019-10-22 08:57:33,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-10-22 08:57:33,075 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 08:57:33,076 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 08:57:33,078 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 08:57:33,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:57:33,085 INFO L82 PathProgramCache]: Analyzing trace with hash -394807891, now seen corresponding path program 1 times [2019-10-22 08:57:33,093 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:57:33,094 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244112304] [2019-10-22 08:57:33,094 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:57:33,094 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:57:33,094 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:57:33,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:57:33,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:57:33,408 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 08:57:33,408 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244112304] [2019-10-22 08:57:33,409 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-22 08:57:33,409 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-22 08:57:33,410 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655755603] [2019-10-22 08:57:33,414 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-22 08:57:33,414 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 08:57:33,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-22 08:57:33,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-22 08:57:33,428 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 5 states. [2019-10-22 08:57:33,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 08:57:33,483 INFO L93 Difference]: Finished difference Result 35 states and 40 transitions. [2019-10-22 08:57:33,484 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-22 08:57:33,485 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2019-10-22 08:57:33,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 08:57:33,495 INFO L225 Difference]: With dead ends: 35 [2019-10-22 08:57:33,495 INFO L226 Difference]: Without dead ends: 22 [2019-10-22 08:57:33,499 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-22 08:57:33,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2019-10-22 08:57:33,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2019-10-22 08:57:33,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-10-22 08:57:33,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2019-10-22 08:57:33,537 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 9 [2019-10-22 08:57:33,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 08:57:33,538 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2019-10-22 08:57:33,538 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-22 08:57:33,538 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2019-10-22 08:57:33,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-10-22 08:57:33,539 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 08:57:33,540 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 08:57:33,540 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 08:57:33,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:57:33,541 INFO L82 PathProgramCache]: Analyzing trace with hash 1343664860, now seen corresponding path program 1 times [2019-10-22 08:57:33,541 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:57:33,541 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937275823] [2019-10-22 08:57:33,541 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:57:33,542 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:57:33,542 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:57:33,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:57:33,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:57:33,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:57:33,637 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 08:57:33,638 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937275823] [2019-10-22 08:57:33,638 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-22 08:57:33,638 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-22 08:57:33,638 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408449916] [2019-10-22 08:57:33,640 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-22 08:57:33,640 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 08:57:33,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-22 08:57:33,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-22 08:57:33,641 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand 5 states. [2019-10-22 08:57:33,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 08:57:33,657 INFO L93 Difference]: Finished difference Result 28 states and 32 transitions. [2019-10-22 08:57:33,657 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-22 08:57:33,657 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2019-10-22 08:57:33,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 08:57:33,658 INFO L225 Difference]: With dead ends: 28 [2019-10-22 08:57:33,658 INFO L226 Difference]: Without dead ends: 24 [2019-10-22 08:57:33,659 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-22 08:57:33,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2019-10-22 08:57:33,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 22. [2019-10-22 08:57:33,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-10-22 08:57:33,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2019-10-22 08:57:33,664 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 16 [2019-10-22 08:57:33,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 08:57:33,664 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2019-10-22 08:57:33,664 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-22 08:57:33,664 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2019-10-22 08:57:33,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-10-22 08:57:33,665 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 08:57:33,665 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 08:57:33,665 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 08:57:33,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:57:33,666 INFO L82 PathProgramCache]: Analyzing trace with hash 1372294011, now seen corresponding path program 1 times [2019-10-22 08:57:33,666 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:57:33,666 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259094253] [2019-10-22 08:57:33,666 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:57:33,666 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:57:33,667 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:57:33,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:57:33,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:57:33,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:57:33,805 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 08:57:33,806 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259094253] [2019-10-22 08:57:33,806 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-22 08:57:33,806 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-10-22 08:57:33,806 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436192471] [2019-10-22 08:57:33,807 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-22 08:57:33,807 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 08:57:33,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-22 08:57:33,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2019-10-22 08:57:33,808 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand 8 states. [2019-10-22 08:57:33,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 08:57:33,865 INFO L93 Difference]: Finished difference Result 44 states and 52 transitions. [2019-10-22 08:57:33,866 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-22 08:57:33,866 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 16 [2019-10-22 08:57:33,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 08:57:33,867 INFO L225 Difference]: With dead ends: 44 [2019-10-22 08:57:33,868 INFO L226 Difference]: Without dead ends: 28 [2019-10-22 08:57:33,868 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2019-10-22 08:57:33,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-10-22 08:57:33,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 26. [2019-10-22 08:57:33,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-10-22 08:57:33,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2019-10-22 08:57:33,874 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 16 [2019-10-22 08:57:33,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 08:57:33,874 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2019-10-22 08:57:33,875 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-22 08:57:33,875 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2019-10-22 08:57:33,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-10-22 08:57:33,875 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 08:57:33,876 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 08:57:33,876 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 08:57:33,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:57:33,877 INFO L82 PathProgramCache]: Analyzing trace with hash -971845561, now seen corresponding path program 1 times [2019-10-22 08:57:33,877 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:57:33,877 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892506452] [2019-10-22 08:57:33,877 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:57:33,877 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:57:33,877 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:57:33,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:57:33,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:57:33,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:57:33,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:57:33,976 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-22 08:57:33,976 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892506452] [2019-10-22 08:57:33,976 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-22 08:57:33,976 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-22 08:57:33,977 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468979761] [2019-10-22 08:57:33,977 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-22 08:57:33,977 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 08:57:33,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-22 08:57:33,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-22 08:57:33,978 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand 5 states. [2019-10-22 08:57:33,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 08:57:33,995 INFO L93 Difference]: Finished difference Result 46 states and 53 transitions. [2019-10-22 08:57:33,996 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-22 08:57:33,996 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 23 [2019-10-22 08:57:33,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 08:57:33,997 INFO L225 Difference]: With dead ends: 46 [2019-10-22 08:57:33,997 INFO L226 Difference]: Without dead ends: 32 [2019-10-22 08:57:33,997 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-22 08:57:33,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-10-22 08:57:34,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2019-10-22 08:57:34,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-10-22 08:57:34,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2019-10-22 08:57:34,003 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 23 [2019-10-22 08:57:34,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 08:57:34,003 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2019-10-22 08:57:34,003 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-22 08:57:34,003 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2019-10-22 08:57:34,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-10-22 08:57:34,004 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 08:57:34,005 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 08:57:34,005 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 08:57:34,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:57:34,005 INFO L82 PathProgramCache]: Analyzing trace with hash -1168359066, now seen corresponding path program 1 times [2019-10-22 08:57:34,005 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:57:34,005 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732157336] [2019-10-22 08:57:34,006 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:57:34,006 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:57:34,006 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:57:34,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:57:34,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:57:34,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:57:34,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:57:34,221 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 08:57:34,222 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732157336] [2019-10-22 08:57:34,222 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [18614398] [2019-10-22 08:57:34,222 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b402491d-12e4-4ca8-a7c3-18ab430d075e/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 08:57:34,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:57:34,264 INFO L256 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 20 conjunts are in the unsatisfiable core [2019-10-22 08:57:34,270 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 08:57:34,350 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 08:57:34,351 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 08:57:34,351 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2019-10-22 08:57:34,351 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620301808] [2019-10-22 08:57:34,352 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-22 08:57:34,352 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 08:57:34,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-22 08:57:34,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2019-10-22 08:57:34,353 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand 12 states. [2019-10-22 08:57:34,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 08:57:34,459 INFO L93 Difference]: Finished difference Result 60 states and 69 transitions. [2019-10-22 08:57:34,459 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-10-22 08:57:34,459 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 23 [2019-10-22 08:57:34,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 08:57:34,460 INFO L225 Difference]: With dead ends: 60 [2019-10-22 08:57:34,460 INFO L226 Difference]: Without dead ends: 40 [2019-10-22 08:57:34,461 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2019-10-22 08:57:34,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2019-10-22 08:57:34,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 34. [2019-10-22 08:57:34,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-10-22 08:57:34,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2019-10-22 08:57:34,467 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 23 [2019-10-22 08:57:34,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 08:57:34,467 INFO L462 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2019-10-22 08:57:34,467 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-22 08:57:34,467 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2019-10-22 08:57:34,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-10-22 08:57:34,468 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 08:57:34,468 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 08:57:34,669 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 08:57:34,669 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 08:57:34,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:57:34,670 INFO L82 PathProgramCache]: Analyzing trace with hash -222974932, now seen corresponding path program 1 times [2019-10-22 08:57:34,670 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:57:34,670 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52541257] [2019-10-22 08:57:34,670 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:57:34,670 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:57:34,671 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:57:34,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:57:34,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:57:34,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:57:34,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:57:34,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:57:35,017 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-22 08:57:35,017 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52541257] [2019-10-22 08:57:35,018 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [676173901] [2019-10-22 08:57:35,018 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b402491d-12e4-4ca8-a7c3-18ab430d075e/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 08:57:35,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:57:35,052 INFO L256 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 26 conjunts are in the unsatisfiable core [2019-10-22 08:57:35,059 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 08:57:35,141 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-22 08:57:35,142 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 08:57:35,142 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2019-10-22 08:57:35,142 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752121015] [2019-10-22 08:57:35,143 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-10-22 08:57:35,143 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 08:57:35,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-10-22 08:57:35,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=182, Unknown=0, NotChecked=0, Total=210 [2019-10-22 08:57:35,144 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand 15 states. [2019-10-22 08:57:35,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 08:57:35,349 INFO L93 Difference]: Finished difference Result 68 states and 77 transitions. [2019-10-22 08:57:35,350 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-10-22 08:57:35,350 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 30 [2019-10-22 08:57:35,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 08:57:35,351 INFO L225 Difference]: With dead ends: 68 [2019-10-22 08:57:35,351 INFO L226 Difference]: Without dead ends: 48 [2019-10-22 08:57:35,352 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2019-10-22 08:57:35,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2019-10-22 08:57:35,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 38. [2019-10-22 08:57:35,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-10-22 08:57:35,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2019-10-22 08:57:35,361 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 30 [2019-10-22 08:57:35,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 08:57:35,362 INFO L462 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2019-10-22 08:57:35,362 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-10-22 08:57:35,362 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2019-10-22 08:57:35,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-10-22 08:57:35,363 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 08:57:35,363 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 08:57:35,566 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 08:57:35,566 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 08:57:35,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:57:35,566 INFO L82 PathProgramCache]: Analyzing trace with hash -141607649, now seen corresponding path program 2 times [2019-10-22 08:57:35,567 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:57:35,567 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374942636] [2019-10-22 08:57:35,567 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:57:35,567 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:57:35,567 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:57:35,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:57:35,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:57:35,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:57:35,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:57:35,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:57:35,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:57:35,929 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-22 08:57:35,929 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374942636] [2019-10-22 08:57:35,930 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1557015122] [2019-10-22 08:57:35,930 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b402491d-12e4-4ca8-a7c3-18ab430d075e/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 08:57:35,959 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-22 08:57:35,959 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 08:57:35,960 INFO L256 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 32 conjunts are in the unsatisfiable core [2019-10-22 08:57:35,961 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 08:57:36,020 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-22 08:57:36,020 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 08:57:36,020 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2019-10-22 08:57:36,021 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39456496] [2019-10-22 08:57:36,021 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-10-22 08:57:36,021 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 08:57:36,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-10-22 08:57:36,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=272, Unknown=0, NotChecked=0, Total=306 [2019-10-22 08:57:36,022 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand 18 states. [2019-10-22 08:57:36,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 08:57:36,211 INFO L93 Difference]: Finished difference Result 76 states and 85 transitions. [2019-10-22 08:57:36,213 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-10-22 08:57:36,213 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 37 [2019-10-22 08:57:36,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 08:57:36,214 INFO L225 Difference]: With dead ends: 76 [2019-10-22 08:57:36,214 INFO L226 Difference]: Without dead ends: 56 [2019-10-22 08:57:36,214 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=50, Invalid=412, Unknown=0, NotChecked=0, Total=462 [2019-10-22 08:57:36,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2019-10-22 08:57:36,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 42. [2019-10-22 08:57:36,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-10-22 08:57:36,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 46 transitions. [2019-10-22 08:57:36,220 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 46 transitions. Word has length 37 [2019-10-22 08:57:36,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 08:57:36,221 INFO L462 AbstractCegarLoop]: Abstraction has 42 states and 46 transitions. [2019-10-22 08:57:36,221 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-10-22 08:57:36,221 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 46 transitions. [2019-10-22 08:57:36,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-10-22 08:57:36,222 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 08:57:36,222 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 08:57:36,423 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 08:57:36,424 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 08:57:36,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:57:36,424 INFO L82 PathProgramCache]: Analyzing trace with hash -90623267, now seen corresponding path program 2 times [2019-10-22 08:57:36,424 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:57:36,425 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861838484] [2019-10-22 08:57:36,425 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:57:36,425 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:57:36,425 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:57:36,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:57:36,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:57:36,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:57:36,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:57:36,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:57:36,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:57:36,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:57:36,761 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-22 08:57:36,761 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861838484] [2019-10-22 08:57:36,761 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1930133773] [2019-10-22 08:57:36,761 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b402491d-12e4-4ca8-a7c3-18ab430d075e/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 08:57:36,790 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2019-10-22 08:57:36,790 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 08:57:36,797 INFO L256 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-22 08:57:36,799 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 08:57:36,896 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2019-10-22 08:57:36,897 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-22 08:57:36,897 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [20] total 23 [2019-10-22 08:57:36,897 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222638276] [2019-10-22 08:57:36,898 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-22 08:57:36,898 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 08:57:36,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-22 08:57:36,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=458, Unknown=0, NotChecked=0, Total=506 [2019-10-22 08:57:36,898 INFO L87 Difference]: Start difference. First operand 42 states and 46 transitions. Second operand 5 states. [2019-10-22 08:57:36,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 08:57:36,914 INFO L93 Difference]: Finished difference Result 42 states and 46 transitions. [2019-10-22 08:57:36,914 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-22 08:57:36,914 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 44 [2019-10-22 08:57:36,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 08:57:36,915 INFO L225 Difference]: With dead ends: 42 [2019-10-22 08:57:36,915 INFO L226 Difference]: Without dead ends: 0 [2019-10-22 08:57:36,916 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=48, Invalid=458, Unknown=0, NotChecked=0, Total=506 [2019-10-22 08:57:36,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-10-22 08:57:36,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-10-22 08:57:36,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-10-22 08:57:36,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-10-22 08:57:36,916 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 44 [2019-10-22 08:57:36,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 08:57:36,917 INFO L462 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-10-22 08:57:36,917 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-22 08:57:36,917 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-10-22 08:57:36,917 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-10-22 08:57:37,117 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 08:57:37,121 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2019-10-22 08:57:37,132 INFO L443 ceAbstractionStarter]: For program point L17(line 17) no Hoare annotation was computed. [2019-10-22 08:57:37,132 INFO L446 ceAbstractionStarter]: At program point L16(line 16) the Hoare annotation is: true [2019-10-22 08:57:37,133 INFO L443 ceAbstractionStarter]: For program point L15(line 15) no Hoare annotation was computed. [2019-10-22 08:57:37,133 INFO L443 ceAbstractionStarter]: For program point L16-1(line 16) no Hoare annotation was computed. [2019-10-22 08:57:37,133 INFO L443 ceAbstractionStarter]: For program point id2EXIT(lines 14 19) no Hoare annotation was computed. [2019-10-22 08:57:37,133 INFO L446 ceAbstractionStarter]: At program point id2ENTRY(lines 14 19) the Hoare annotation is: true [2019-10-22 08:57:37,133 INFO L443 ceAbstractionStarter]: For program point id2FINAL(lines 14 19) no Hoare annotation was computed. [2019-10-22 08:57:37,133 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2019-10-22 08:57:37,133 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2019-10-22 08:57:37,133 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2019-10-22 08:57:37,133 INFO L443 ceAbstractionStarter]: For program point L25(line 25) no Hoare annotation was computed. [2019-10-22 08:57:37,133 INFO L443 ceAbstractionStarter]: For program point L24(lines 24 26) no Hoare annotation was computed. [2019-10-22 08:57:37,134 INFO L446 ceAbstractionStarter]: At program point L23(line 23) the Hoare annotation is: true [2019-10-22 08:57:37,134 INFO L443 ceAbstractionStarter]: For program point L23-1(line 23) no Hoare annotation was computed. [2019-10-22 08:57:37,134 INFO L443 ceAbstractionStarter]: For program point L21(lines 21 27) no Hoare annotation was computed. [2019-10-22 08:57:37,134 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 25) no Hoare annotation was computed. [2019-10-22 08:57:37,134 INFO L443 ceAbstractionStarter]: For program point idFINAL(lines 7 12) no Hoare annotation was computed. [2019-10-22 08:57:37,134 INFO L443 ceAbstractionStarter]: For program point idEXIT(lines 7 12) no Hoare annotation was computed. [2019-10-22 08:57:37,134 INFO L443 ceAbstractionStarter]: For program point L10(line 10) no Hoare annotation was computed. [2019-10-22 08:57:37,134 INFO L446 ceAbstractionStarter]: At program point L9(line 9) the Hoare annotation is: true [2019-10-22 08:57:37,135 INFO L443 ceAbstractionStarter]: For program point L8(line 8) no Hoare annotation was computed. [2019-10-22 08:57:37,135 INFO L443 ceAbstractionStarter]: For program point L9-1(line 9) no Hoare annotation was computed. [2019-10-22 08:57:37,135 INFO L446 ceAbstractionStarter]: At program point idENTRY(lines 7 12) the Hoare annotation is: true [2019-10-22 08:57:37,138 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.10 08:57:37 BoogieIcfgContainer [2019-10-22 08:57:37,138 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-10-22 08:57:37,139 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-10-22 08:57:37,139 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-10-22 08:57:37,139 INFO L275 PluginConnector]: Witness Printer initialized [2019-10-22 08:57:37,140 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 08:57:32" (3/4) ... [2019-10-22 08:57:37,145 INFO L137 WitnessPrinter]: Generating witness for correct program [2019-10-22 08:57:37,152 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure id2 [2019-10-22 08:57:37,154 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure id [2019-10-22 08:57:37,158 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2019-10-22 08:57:37,159 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2019-10-22 08:57:37,206 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_b402491d-12e4-4ca8-a7c3-18ab430d075e/bin/uautomizer/witness.graphml [2019-10-22 08:57:37,206 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-10-22 08:57:37,208 INFO L168 Benchmark]: Toolchain (without parser) took 4821.75 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 178.8 MB). Free memory was 944.5 MB in the beginning and 996.4 MB in the end (delta: -51.8 MB). Peak memory consumption was 126.9 MB. Max. memory is 11.5 GB. [2019-10-22 08:57:37,209 INFO L168 Benchmark]: CDTParser took 0.17 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 08:57:37,209 INFO L168 Benchmark]: CACSL2BoogieTranslator took 370.88 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 178.8 MB). Free memory was 944.5 MB in the beginning and 1.2 GB in the end (delta: -231.8 MB). Peak memory consumption was 22.8 MB. Max. memory is 11.5 GB. [2019-10-22 08:57:37,210 INFO L168 Benchmark]: Boogie Procedure Inliner took 30.50 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 08:57:37,210 INFO L168 Benchmark]: Boogie Preprocessor took 18.24 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: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. [2019-10-22 08:57:37,210 INFO L168 Benchmark]: RCFGBuilder took 183.49 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: 17.0 MB). Peak memory consumption was 17.0 MB. Max. memory is 11.5 GB. [2019-10-22 08:57:37,211 INFO L168 Benchmark]: TraceAbstraction took 4146.94 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.0 GB in the end (delta: 153.4 MB). Peak memory consumption was 153.4 MB. Max. memory is 11.5 GB. [2019-10-22 08:57:37,211 INFO L168 Benchmark]: Witness Printer took 67.69 ms. Allocated memory is still 1.2 GB. Free memory was 1.0 GB in the beginning and 996.4 MB in the end (delta: 6.9 MB). Peak memory consumption was 6.9 MB. Max. memory is 11.5 GB. [2019-10-22 08:57:37,213 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 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 370.88 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 178.8 MB). Free memory was 944.5 MB in the beginning and 1.2 GB in the end (delta: -231.8 MB). Peak memory consumption was 22.8 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 30.50 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 18.24 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: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. * RCFGBuilder took 183.49 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: 17.0 MB). Peak memory consumption was 17.0 MB. Max. memory is 11.5 GB. * TraceAbstraction took 4146.94 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.0 GB in the end (delta: 153.4 MB). Peak memory consumption was 153.4 MB. Max. memory is 11.5 GB. * Witness Printer took 67.69 ms. Allocated memory is still 1.2 GB. Free memory was 1.0 GB in the beginning and 996.4 MB in the end (delta: 6.9 MB). Peak memory consumption was 6.9 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 25]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 23 locations, 1 error locations. Result: SAFE, OverallTime: 4.0s, OverallIterations: 8, TraceHistogramMax: 3, AutomataDifference: 0.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 204 SDtfs, 25 SDslu, 1327 SDs, 0 SdLazy, 412 SolverSat, 9 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 278 GetRequests, 187 SyntacticMatches, 6 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 1.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=42occurred in iteration=7, 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, 36 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 5 LocationsWithAnnotation, 7 PreInvPairs, 7 NumberOfFragments, 5 HoareAnnotationTreeSize, 7 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 5 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 2.0s InterpolantComputationTime, 332 NumberOfCodeBlocks, 304 NumberOfCodeBlocksAsserted, 13 NumberOfCheckSat, 320 ConstructedInterpolants, 0 QuantifiedInterpolants, 36678 SizeOfPredicates, 14 NumberOfNonLiveVariables, 238 ConjunctsInSsa, 86 ConjunctsInUnsatCore, 12 InterpolantComputations, 5 PerfectInterpolantSequences, 90/150 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...