./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive-simple/id_i10_o10-2.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_d81ea17c-9237-4fb8-b081-37ac9849b06f/bin/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_d81ea17c-9237-4fb8-b081-37ac9849b06f/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_d81ea17c-9237-4fb8-b081-37ac9849b06f/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_d81ea17c-9237-4fb8-b081-37ac9849b06f/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/recursive-simple/id_i10_o10-2.c -s /tmp/vcloud-vcloud-master/worker/working_dir_d81ea17c-9237-4fb8-b081-37ac9849b06f/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_d81ea17c-9237-4fb8-b081-37ac9849b06f/bin/utaipan --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 Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash d354f5dc1a4e4616bf2c7c7fc4888805a134a8dd ........................................................................................................................................................................................................................................................................................................................... Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_d81ea17c-9237-4fb8-b081-37ac9849b06f/bin/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_d81ea17c-9237-4fb8-b081-37ac9849b06f/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_d81ea17c-9237-4fb8-b081-37ac9849b06f/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_d81ea17c-9237-4fb8-b081-37ac9849b06f/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/recursive-simple/id_i10_o10-2.c -s /tmp/vcloud-vcloud-master/worker/working_dir_d81ea17c-9237-4fb8-b081-37ac9849b06f/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_d81ea17c-9237-4fb8-b081-37ac9849b06f/bin/utaipan --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 Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash d354f5dc1a4e4616bf2c7c7fc4888805a134a8dd .............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. 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 11:21:53,358 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-22 11:21:53,360 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-22 11:21:53,370 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-22 11:21:53,370 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-22 11:21:53,372 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-22 11:21:53,373 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-22 11:21:53,374 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-22 11:21:53,376 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-22 11:21:53,376 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-22 11:21:53,377 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-22 11:21:53,378 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-22 11:21:53,379 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-22 11:21:53,380 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-22 11:21:53,381 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-22 11:21:53,382 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-22 11:21:53,382 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-22 11:21:53,384 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-22 11:21:53,385 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-22 11:21:53,387 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-22 11:21:53,389 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-22 11:21:53,390 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-22 11:21:53,391 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-22 11:21:53,392 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-22 11:21:53,394 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-22 11:21:53,395 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-22 11:21:53,395 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-22 11:21:53,396 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-22 11:21:53,396 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-22 11:21:53,397 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-22 11:21:53,397 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-22 11:21:53,398 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-22 11:21:53,399 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-22 11:21:53,400 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-22 11:21:53,401 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-22 11:21:53,401 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-22 11:21:53,402 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-22 11:21:53,402 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-22 11:21:53,402 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-22 11:21:53,403 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-22 11:21:53,404 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-22 11:21:53,404 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_d81ea17c-9237-4fb8-b081-37ac9849b06f/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2019-10-22 11:21:53,417 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-22 11:21:53,418 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-22 11:21:53,419 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-10-22 11:21:53,419 INFO L138 SettingsManager]: * User list type=DISABLED [2019-10-22 11:21:53,419 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-10-22 11:21:53,419 INFO L138 SettingsManager]: * Explicit value domain=true [2019-10-22 11:21:53,420 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-10-22 11:21:53,420 INFO L138 SettingsManager]: * Octagon Domain=false [2019-10-22 11:21:53,420 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-10-22 11:21:53,420 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-10-22 11:21:53,420 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-10-22 11:21:53,420 INFO L138 SettingsManager]: * Interval Domain=false [2019-10-22 11:21:53,421 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-22 11:21:53,421 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-22 11:21:53,421 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-22 11:21:53,422 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-22 11:21:53,422 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-22 11:21:53,422 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-22 11:21:53,422 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-22 11:21:53,422 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-22 11:21:53,422 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-22 11:21:53,423 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-22 11:21:53,423 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-22 11:21:53,423 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-22 11:21:53,424 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-22 11:21:53,424 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-22 11:21:53,424 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-22 11:21:53,424 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-22 11:21:53,424 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-22 11:21:53,424 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-22 11:21:53,425 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-22 11:21:53,425 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-10-22 11:21:53,425 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-22 11:21:53,425 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-22 11:21:53,425 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-22 11:21:53,425 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_d81ea17c-9237-4fb8-b081-37ac9849b06f/bin/utaipan 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 -> Taipan 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 -> d354f5dc1a4e4616bf2c7c7fc4888805a134a8dd [2019-10-22 11:21:53,463 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-22 11:21:53,474 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-22 11:21:53,477 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-22 11:21:53,479 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-22 11:21:53,479 INFO L275 PluginConnector]: CDTParser initialized [2019-10-22 11:21:53,480 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_d81ea17c-9237-4fb8-b081-37ac9849b06f/bin/utaipan/../../sv-benchmarks/c/recursive-simple/id_i10_o10-2.c [2019-10-22 11:21:53,531 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_d81ea17c-9237-4fb8-b081-37ac9849b06f/bin/utaipan/data/ee29aef7c/51f9e5a6d123400189df391bddd85cbc/FLAG7550ed812 [2019-10-22 11:21:53,933 INFO L306 CDTParser]: Found 1 translation units. [2019-10-22 11:21:53,934 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_d81ea17c-9237-4fb8-b081-37ac9849b06f/sv-benchmarks/c/recursive-simple/id_i10_o10-2.c [2019-10-22 11:21:53,939 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_d81ea17c-9237-4fb8-b081-37ac9849b06f/bin/utaipan/data/ee29aef7c/51f9e5a6d123400189df391bddd85cbc/FLAG7550ed812 [2019-10-22 11:21:53,952 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_d81ea17c-9237-4fb8-b081-37ac9849b06f/bin/utaipan/data/ee29aef7c/51f9e5a6d123400189df391bddd85cbc [2019-10-22 11:21:53,955 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-22 11:21:53,956 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-10-22 11:21:53,957 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-22 11:21:53,957 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-22 11:21:53,961 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-22 11:21:53,962 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 11:21:53" (1/1) ... [2019-10-22 11:21:53,965 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@65deb23b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:21:53, skipping insertion in model container [2019-10-22 11:21:53,965 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 11:21:53" (1/1) ... [2019-10-22 11:21:53,973 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-22 11:21:53,989 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-22 11:21:54,179 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-22 11:21:54,184 INFO L188 MainTranslator]: Completed pre-run [2019-10-22 11:21:54,295 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-22 11:21:54,309 INFO L192 MainTranslator]: Completed translation [2019-10-22 11:21:54,309 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:21:54 WrapperNode [2019-10-22 11:21:54,309 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-22 11:21:54,310 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-10-22 11:21:54,311 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-10-22 11:21:54,311 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-10-22 11:21:54,320 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:21:54" (1/1) ... [2019-10-22 11:21:54,325 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:21:54" (1/1) ... [2019-10-22 11:21:54,344 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-10-22 11:21:54,344 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-22 11:21:54,345 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-22 11:21:54,345 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-22 11:21:54,355 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:21:54" (1/1) ... [2019-10-22 11:21:54,355 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:21:54" (1/1) ... [2019-10-22 11:21:54,356 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:21:54" (1/1) ... [2019-10-22 11:21:54,356 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:21:54" (1/1) ... [2019-10-22 11:21:54,358 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:21:54" (1/1) ... [2019-10-22 11:21:54,360 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:21:54" (1/1) ... [2019-10-22 11:21:54,361 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:21:54" (1/1) ... [2019-10-22 11:21:54,362 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-22 11:21:54,363 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-22 11:21:54,363 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-22 11:21:54,363 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-22 11:21:54,364 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:21:54" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d81ea17c-9237-4fb8-b081-37ac9849b06f/bin/utaipan/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 11:21:54,432 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-22 11:21:54,432 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-22 11:21:54,432 INFO L130 BoogieDeclarations]: Found specification of procedure id [2019-10-22 11:21:54,432 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2019-10-22 11:21:54,555 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-22 11:21:54,556 INFO L284 CfgBuilder]: Removed 4 assume(true) statements. [2019-10-22 11:21:54,557 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 11:21:54 BoogieIcfgContainer [2019-10-22 11:21:54,557 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-22 11:21:54,558 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-22 11:21:54,558 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-22 11:21:54,562 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-22 11:21:54,562 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.10 11:21:53" (1/3) ... [2019-10-22 11:21:54,563 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71ca1215 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 11:21:54, skipping insertion in model container [2019-10-22 11:21:54,563 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:21:54" (2/3) ... [2019-10-22 11:21:54,563 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71ca1215 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 11:21:54, skipping insertion in model container [2019-10-22 11:21:54,564 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 11:21:54" (3/3) ... [2019-10-22 11:21:54,565 INFO L109 eAbstractionObserver]: Analyzing ICFG id_i10_o10-2.c [2019-10-22 11:21:54,576 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-22 11:21:54,583 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-22 11:21:54,596 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-22 11:21:54,617 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-22 11:21:54,617 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-22 11:21:54,618 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-22 11:21:54,618 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-22 11:21:54,618 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-22 11:21:54,618 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-22 11:21:54,618 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-22 11:21:54,618 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-22 11:21:54,637 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states. [2019-10-22 11:21:54,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-10-22 11:21:54,643 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 11:21:54,644 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 11:21:54,646 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 11:21:54,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 11:21:54,658 INFO L82 PathProgramCache]: Analyzing trace with hash 389977641, now seen corresponding path program 1 times [2019-10-22 11:21:54,669 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-22 11:21:54,669 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457152234] [2019-10-22 11:21:54,669 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 11:21:54,670 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 11:21:54,670 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 11:21:54,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 11:21:54,990 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 11:21:54,991 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457152234] [2019-10-22 11:21:54,992 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-22 11:21:54,992 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-22 11:21:54,992 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891532015] [2019-10-22 11:21:54,998 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-22 11:21:55,001 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-22 11:21:55,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-22 11:21:55,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-22 11:21:55,013 INFO L87 Difference]: Start difference. First operand 15 states. Second operand 5 states. [2019-10-22 11:21:55,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 11:21:55,113 INFO L93 Difference]: Finished difference Result 24 states and 27 transitions. [2019-10-22 11:21:55,114 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-22 11:21:55,115 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2019-10-22 11:21:55,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 11:21:55,124 INFO L225 Difference]: With dead ends: 24 [2019-10-22 11:21:55,124 INFO L226 Difference]: Without dead ends: 14 [2019-10-22 11:21:55,128 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-22 11:21:55,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2019-10-22 11:21:55,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2019-10-22 11:21:55,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2019-10-22 11:21:55,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2019-10-22 11:21:55,170 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 9 [2019-10-22 11:21:55,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 11:21:55,171 INFO L462 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2019-10-22 11:21:55,171 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-22 11:21:55,171 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2019-10-22 11:21:55,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-10-22 11:21:55,172 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 11:21:55,173 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 11:21:55,173 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 11:21:55,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 11:21:55,173 INFO L82 PathProgramCache]: Analyzing trace with hash -881029229, now seen corresponding path program 1 times [2019-10-22 11:21:55,174 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-22 11:21:55,174 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808385041] [2019-10-22 11:21:55,174 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 11:21:55,174 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 11:21:55,175 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 11:21:55,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 11:21:55,231 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 11:21:55,231 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808385041] [2019-10-22 11:21:55,231 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [783453497] [2019-10-22 11:21:55,231 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d81ea17c-9237-4fb8-b081-37ac9849b06f/bin/utaipan/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 11:21:55,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 11:21:55,267 INFO L256 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-22 11:21:55,273 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 11:21:55,321 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 11:21:55,321 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 11:21:55,515 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:21:55,560 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-22 11:21:55,561 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [710851299] [2019-10-22 11:21:55,571 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 16 [2019-10-22 11:21:55,614 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-10-22 11:21:55,615 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-22 11:21:55,910 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 11:21:55,911 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: inappropriate decl info IMPLEMENTATION at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.boogie.Boogie2SmtSymbolTable.getBoogieVar(Boogie2SmtSymbolTable.java:222) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.domain.nonrelational.NonrelationalStatementProcessor.getBoogieVar(NonrelationalStatementProcessor.java:348) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.domain.nonrelational.NonrelationalStatementProcessor.handleHavocStatement(NonrelationalStatementProcessor.java:325) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.domain.nonrelational.NonrelationalStatementProcessor.processStatement(NonrelationalStatementProcessor.java:159) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.domain.nonrelational.NonrelationalStatementProcessor.process(NonrelationalStatementProcessor.java:138) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.domain.nonrelational.NonrelationalStatementProcessor.process(NonrelationalStatementProcessor.java:107) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.domain.nonrelational.NonrelationalPostOperator.handleInternalTransition(NonrelationalPostOperator.java:422) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.domain.nonrelational.NonrelationalPostOperator.handleInternalTransition(NonrelationalPostOperator.java:413) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.domain.nonrelational.NonrelationalPostOperator.apply(NonrelationalPostOperator.java:140) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.domain.nonrelational.NonrelationalPostOperator.apply(NonrelationalPostOperator.java:1) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.domain.compound.CompoundDomainPostOperator.applyInternally(CompoundDomainPostOperator.java:306) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.domain.compound.CompoundDomainPostOperator.apply(CompoundDomainPostOperator.java:131) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.domain.compound.CompoundDomainPostOperator.apply(CompoundDomainPostOperator.java:1) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.domain.transformula.poorman.PoormanCachedPostOperation.restoreOriginalStateVariables(PoormanCachedPostOperation.java:322) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.domain.transformula.poorman.PoormansAbstractPostOperator.applyPost(PoormansAbstractPostOperator.java:217) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.domain.transformula.poorman.PoormansAbstractPostOperator.apply(PoormansAbstractPostOperator.java:120) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.domain.transformula.poorman.PoormansAbstractPostOperator.apply(PoormansAbstractPostOperator.java:1) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.absint.DisjunctiveAbstractState.lambda$17(DisjunctiveAbstractState.java:323) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.absint.DisjunctiveAbstractState.mapCollection(DisjunctiveAbstractState.java:519) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.absint.DisjunctiveAbstractState.apply(DisjunctiveAbstractState.java:323) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.algorithm.FixpointEngine.calculateAbstractPost(FixpointEngine.java:249) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.algorithm.FixpointEngine.calculateFixpoint(FixpointEngine.java:134) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.algorithm.FixpointEngine.run(FixpointEngine.java:105) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.tool.AbstractInterpreter.runWithoutTimeoutAndResults(AbstractInterpreter.java:149) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarAbsIntRunner.generateFixpoints(CegarAbsIntRunner.java:227) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarAbsIntRunner.(CegarAbsIntRunner.java:158) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleAbstractInterpretation.getOrConstructRunner(IpTcStrategyModuleAbstractInterpretation.java:74) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleAbstractInterpretation.construct(IpTcStrategyModuleAbstractInterpretation.java:81) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.tryExecuteInterpolantGenerator(TraceAbstractionRefinementEngine.java:299) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.generateProof(TraceAbstractionRefinementEngine.java:184) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.executeStrategy(TraceAbstractionRefinementEngine.java:174) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.RefinementEngineFactory.runRefinementEngine(RefinementEngineFactory.java:124) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:419) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:368) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterate(TraceAbstractionStarter.java:332) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:170) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:122) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:120) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:316) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) [2019-10-22 11:21:55,919 INFO L168 Benchmark]: Toolchain (without parser) took 1962.10 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 162.0 MB). Free memory was 943.1 MB in the beginning and 1.1 GB in the end (delta: -128.3 MB). Peak memory consumption was 33.7 MB. Max. memory is 11.5 GB. [2019-10-22 11:21:55,919 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 1.0 GB. Free memory is still 960.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-10-22 11:21:55,921 INFO L168 Benchmark]: CACSL2BoogieTranslator took 352.78 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 162.0 MB). Free memory was 941.8 MB in the beginning and 1.2 GB in the end (delta: -216.2 MB). Peak memory consumption was 18.7 MB. Max. memory is 11.5 GB. [2019-10-22 11:21:55,921 INFO L168 Benchmark]: Boogie Procedure Inliner took 33.92 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: 1.8 MB). Peak memory consumption was 1.8 MB. Max. memory is 11.5 GB. [2019-10-22 11:21:55,922 INFO L168 Benchmark]: Boogie Preprocessor took 18.11 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: 1.8 MB). Peak memory consumption was 1.8 MB. Max. memory is 11.5 GB. [2019-10-22 11:21:55,923 INFO L168 Benchmark]: RCFGBuilder took 194.17 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: 17.0 MB). Peak memory consumption was 17.0 MB. Max. memory is 11.5 GB. [2019-10-22 11:21:55,924 INFO L168 Benchmark]: TraceAbstraction took 1358.60 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 64.2 MB). Peak memory consumption was 64.2 MB. Max. memory is 11.5 GB. [2019-10-22 11:21:55,929 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 1.0 GB. Free memory is still 960.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 352.78 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 162.0 MB). Free memory was 941.8 MB in the beginning and 1.2 GB in the end (delta: -216.2 MB). Peak memory consumption was 18.7 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 33.92 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: 1.8 MB). Peak memory consumption was 1.8 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 18.11 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: 1.8 MB). Peak memory consumption was 1.8 MB. Max. memory is 11.5 GB. * RCFGBuilder took 194.17 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: 17.0 MB). Peak memory consumption was 17.0 MB. Max. memory is 11.5 GB. * TraceAbstraction took 1358.60 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 64.2 MB). Peak memory consumption was 64.2 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: inappropriate decl info IMPLEMENTATION de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: inappropriate decl info IMPLEMENTATION: de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.boogie.Boogie2SmtSymbolTable.getBoogieVar(Boogie2SmtSymbolTable.java:222) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... ### Bit-precise run ### This is Ultimate 0.1.24-cad4683 [2019-10-22 11:21:58,166 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-22 11:21:58,169 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-22 11:21:58,182 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-22 11:21:58,182 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-22 11:21:58,183 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-22 11:21:58,184 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-22 11:21:58,186 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-22 11:21:58,187 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-22 11:21:58,188 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-22 11:21:58,189 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-22 11:21:58,190 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-22 11:21:58,190 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-22 11:21:58,191 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-22 11:21:58,192 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-22 11:21:58,193 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-22 11:21:58,194 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-22 11:21:58,194 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-22 11:21:58,196 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-22 11:21:58,198 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-22 11:21:58,199 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-22 11:21:58,200 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-22 11:21:58,201 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-22 11:21:58,202 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-22 11:21:58,204 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-22 11:21:58,205 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-22 11:21:58,205 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-22 11:21:58,206 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-22 11:21:58,206 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-22 11:21:58,207 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-22 11:21:58,207 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-22 11:21:58,208 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-22 11:21:58,213 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-22 11:21:58,216 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-22 11:21:58,217 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-22 11:21:58,217 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-22 11:21:58,218 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-22 11:21:58,218 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-22 11:21:58,218 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-22 11:21:58,219 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-22 11:21:58,224 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-22 11:21:58,224 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_d81ea17c-9237-4fb8-b081-37ac9849b06f/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2019-10-22 11:21:58,245 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-22 11:21:58,249 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-22 11:21:58,251 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-10-22 11:21:58,251 INFO L138 SettingsManager]: * User list type=DISABLED [2019-10-22 11:21:58,251 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-10-22 11:21:58,252 INFO L138 SettingsManager]: * Explicit value domain=true [2019-10-22 11:21:58,252 INFO L138 SettingsManager]: * Octagon Domain=false [2019-10-22 11:21:58,252 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-10-22 11:21:58,252 INFO L138 SettingsManager]: * Interval Domain=false [2019-10-22 11:21:58,253 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-22 11:21:58,253 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-22 11:21:58,253 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-22 11:21:58,253 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-22 11:21:58,254 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-22 11:21:58,254 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-22 11:21:58,254 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-22 11:21:58,254 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2019-10-22 11:21:58,254 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2019-10-22 11:21:58,255 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-22 11:21:58,255 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-22 11:21:58,255 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-22 11:21:58,255 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-22 11:21:58,256 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-22 11:21:58,256 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-22 11:21:58,256 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-22 11:21:58,256 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-22 11:21:58,256 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-22 11:21:58,257 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-22 11:21:58,257 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-22 11:21:58,257 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-22 11:21:58,257 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2019-10-22 11:21:58,257 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2019-10-22 11:21:58,257 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-22 11:21:58,258 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-22 11:21:58,258 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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_d81ea17c-9237-4fb8-b081-37ac9849b06f/bin/utaipan 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 -> Taipan 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 -> d354f5dc1a4e4616bf2c7c7fc4888805a134a8dd [2019-10-22 11:21:58,289 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-22 11:21:58,300 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-22 11:21:58,306 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-22 11:21:58,308 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-22 11:21:58,308 INFO L275 PluginConnector]: CDTParser initialized [2019-10-22 11:21:58,309 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_d81ea17c-9237-4fb8-b081-37ac9849b06f/bin/utaipan/../../sv-benchmarks/c/recursive-simple/id_i10_o10-2.c [2019-10-22 11:21:58,365 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_d81ea17c-9237-4fb8-b081-37ac9849b06f/bin/utaipan/data/bc6352d4f/c929248257f14b5bbd73ae2f28f6d8ae/FLAG37bace922 [2019-10-22 11:21:58,760 INFO L306 CDTParser]: Found 1 translation units. [2019-10-22 11:21:58,761 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_d81ea17c-9237-4fb8-b081-37ac9849b06f/sv-benchmarks/c/recursive-simple/id_i10_o10-2.c [2019-10-22 11:21:58,765 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_d81ea17c-9237-4fb8-b081-37ac9849b06f/bin/utaipan/data/bc6352d4f/c929248257f14b5bbd73ae2f28f6d8ae/FLAG37bace922 [2019-10-22 11:21:59,150 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_d81ea17c-9237-4fb8-b081-37ac9849b06f/bin/utaipan/data/bc6352d4f/c929248257f14b5bbd73ae2f28f6d8ae [2019-10-22 11:21:59,153 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-22 11:21:59,154 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-10-22 11:21:59,155 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-22 11:21:59,155 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-22 11:21:59,159 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-22 11:21:59,160 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 11:21:59" (1/1) ... [2019-10-22 11:21:59,162 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7dae5f23 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:21:59, skipping insertion in model container [2019-10-22 11:21:59,162 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 11:21:59" (1/1) ... [2019-10-22 11:21:59,168 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-22 11:21:59,179 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-22 11:21:59,364 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-22 11:21:59,376 INFO L188 MainTranslator]: Completed pre-run [2019-10-22 11:21:59,394 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-22 11:21:59,411 INFO L192 MainTranslator]: Completed translation [2019-10-22 11:21:59,411 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:21:59 WrapperNode [2019-10-22 11:21:59,411 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-22 11:21:59,412 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-10-22 11:21:59,412 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-10-22 11:21:59,412 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-10-22 11:21:59,421 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:21:59" (1/1) ... [2019-10-22 11:21:59,429 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:21:59" (1/1) ... [2019-10-22 11:21:59,448 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-10-22 11:21:59,449 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-22 11:21:59,449 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-22 11:21:59,449 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-22 11:21:59,564 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:21:59" (1/1) ... [2019-10-22 11:21:59,564 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:21:59" (1/1) ... [2019-10-22 11:21:59,565 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:21:59" (1/1) ... [2019-10-22 11:21:59,566 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:21:59" (1/1) ... [2019-10-22 11:21:59,575 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:21:59" (1/1) ... [2019-10-22 11:21:59,578 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:21:59" (1/1) ... [2019-10-22 11:21:59,579 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:21:59" (1/1) ... [2019-10-22 11:21:59,581 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-22 11:21:59,582 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-22 11:21:59,583 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-22 11:21:59,583 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-22 11:21:59,584 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:21:59" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d81ea17c-9237-4fb8-b081-37ac9849b06f/bin/utaipan/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 11:21:59,649 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-22 11:21:59,650 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-22 11:21:59,650 INFO L130 BoogieDeclarations]: Found specification of procedure id [2019-10-22 11:21:59,650 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2019-10-22 11:21:59,780 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-22 11:21:59,780 INFO L284 CfgBuilder]: Removed 4 assume(true) statements. [2019-10-22 11:21:59,781 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 11:21:59 BoogieIcfgContainer [2019-10-22 11:21:59,781 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-22 11:21:59,782 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-22 11:21:59,782 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-22 11:21:59,785 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-22 11:21:59,786 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.10 11:21:59" (1/3) ... [2019-10-22 11:21:59,786 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4fd44fb8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 11:21:59, skipping insertion in model container [2019-10-22 11:21:59,787 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:21:59" (2/3) ... [2019-10-22 11:21:59,787 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4fd44fb8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 11:21:59, skipping insertion in model container [2019-10-22 11:21:59,787 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 11:21:59" (3/3) ... [2019-10-22 11:21:59,789 INFO L109 eAbstractionObserver]: Analyzing ICFG id_i10_o10-2.c [2019-10-22 11:21:59,799 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-22 11:21:59,806 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-22 11:21:59,818 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-22 11:21:59,840 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-22 11:21:59,840 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-22 11:21:59,840 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-22 11:21:59,840 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-22 11:21:59,840 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-22 11:21:59,840 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-22 11:21:59,841 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-22 11:21:59,841 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-22 11:21:59,855 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states. [2019-10-22 11:21:59,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-10-22 11:21:59,860 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 11:21:59,861 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 11:21:59,862 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 11:21:59,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 11:21:59,867 INFO L82 PathProgramCache]: Analyzing trace with hash 389977641, now seen corresponding path program 1 times [2019-10-22 11:21:59,875 INFO L157 tionRefinementEngine]: Executing refinement strategy WALRUS [2019-10-22 11:21:59,876 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1076862789] [2019-10-22 11:21:59,876 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d81ea17c-9237-4fb8-b081-37ac9849b06f/bin/utaipan/cvc4 Starting monitored process 2 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-10-22 11:21:59,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 11:21:59,929 INFO L256 TraceCheckSpWp]: Trace formula consists of 14 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-22 11:21:59,934 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 11:22:00,043 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 11:22:00,043 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 11:22:00,122 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 11:22:00,123 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1076862789] [2019-10-22 11:22:00,124 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-10-22 11:22:00,124 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 7 [2019-10-22 11:22:00,124 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939881645] [2019-10-22 11:22:00,129 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-22 11:22:00,129 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-10-22 11:22:00,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-22 11:22:00,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2019-10-22 11:22:00,153 INFO L87 Difference]: Start difference. First operand 15 states. Second operand 7 states. [2019-10-22 11:22:00,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 11:22:00,278 INFO L93 Difference]: Finished difference Result 24 states and 27 transitions. [2019-10-22 11:22:00,279 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-22 11:22:00,280 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 9 [2019-10-22 11:22:00,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 11:22:00,291 INFO L225 Difference]: With dead ends: 24 [2019-10-22 11:22:00,291 INFO L226 Difference]: Without dead ends: 14 [2019-10-22 11:22:00,294 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-10-22 11:22:00,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2019-10-22 11:22:00,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2019-10-22 11:22:00,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2019-10-22 11:22:00,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2019-10-22 11:22:00,335 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 9 [2019-10-22 11:22:00,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 11:22:00,335 INFO L462 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2019-10-22 11:22:00,336 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-22 11:22:00,336 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2019-10-22 11:22:00,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-10-22 11:22:00,337 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 11:22:00,337 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 11:22:00,538 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-10-22 11:22:00,539 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 11:22:00,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 11:22:00,539 INFO L82 PathProgramCache]: Analyzing trace with hash -881029229, now seen corresponding path program 1 times [2019-10-22 11:22:00,540 INFO L157 tionRefinementEngine]: Executing refinement strategy WALRUS [2019-10-22 11:22:00,540 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [443325486] [2019-10-22 11:22:00,541 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d81ea17c-9237-4fb8-b081-37ac9849b06f/bin/utaipan/cvc4 Starting monitored process 3 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-10-22 11:22:00,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 11:22:00,615 INFO L256 TraceCheckSpWp]: Trace formula consists of 22 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-22 11:22:00,617 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 11:22:00,675 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 11:22:00,680 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 11:22:00,876 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:22:00,904 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-22 11:22:00,905 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [443325486] [2019-10-22 11:22:00,905 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [37910328] [2019-10-22 11:22:00,905 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d81ea17c-9237-4fb8-b081-37ac9849b06f/bin/utaipan/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 11:22:00,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 11:22:00,942 INFO L256 TraceCheckSpWp]: Trace formula consists of 22 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-22 11:22:00,944 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 11:22:00,951 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 11:22:00,951 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 11:22:01,081 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:22:01,085 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-22 11:22:01,086 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-22 11:22:01,086 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6, 7] total 9 [2019-10-22 11:22:01,086 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606603228] [2019-10-22 11:22:01,088 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-22 11:22:01,089 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-10-22 11:22:01,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-22 11:22:01,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2019-10-22 11:22:01,090 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 9 states. [2019-10-22 11:22:01,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 11:22:01,166 INFO L93 Difference]: Finished difference Result 21 states and 22 transitions. [2019-10-22 11:22:01,167 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-22 11:22:01,167 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2019-10-22 11:22:01,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 11:22:01,168 INFO L225 Difference]: With dead ends: 21 [2019-10-22 11:22:01,169 INFO L226 Difference]: Without dead ends: 17 [2019-10-22 11:22:01,170 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2019-10-22 11:22:01,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2019-10-22 11:22:01,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2019-10-22 11:22:01,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-10-22 11:22:01,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2019-10-22 11:22:01,175 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 15 [2019-10-22 11:22:01,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 11:22:01,176 INFO L462 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2019-10-22 11:22:01,176 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-22 11:22:01,176 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2019-10-22 11:22:01,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-10-22 11:22:01,177 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 11:22:01,177 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 11:22:01,578 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 cvc4 --incremental --print-success --lang smt --rewrite-divk,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 11:22:01,578 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 11:22:01,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 11:22:01,579 INFO L82 PathProgramCache]: Analyzing trace with hash -1824240471, now seen corresponding path program 2 times [2019-10-22 11:22:01,579 INFO L157 tionRefinementEngine]: Executing refinement strategy WALRUS [2019-10-22 11:22:01,579 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1790038860] [2019-10-22 11:22:01,579 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d81ea17c-9237-4fb8-b081-37ac9849b06f/bin/utaipan/cvc4 Starting monitored process 5 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-10-22 11:22:01,619 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-22 11:22:01,620 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 11:22:01,620 INFO L256 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-22 11:22:01,622 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 11:22:01,673 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-10-22 11:22:01,673 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 11:22:01,924 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:22:01,980 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:22:02,006 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-22 11:22:02,012 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1790038860] [2019-10-22 11:22:02,012 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [600177392] [2019-10-22 11:22:02,012 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d81ea17c-9237-4fb8-b081-37ac9849b06f/bin/utaipan/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 11:22:02,050 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-22 11:22:02,051 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 11:22:02,052 INFO L256 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-22 11:22:02,054 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 11:22:02,064 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-10-22 11:22:02,066 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 11:22:02,243 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:22:02,277 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:22:02,281 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-22 11:22:02,281 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-22 11:22:02,281 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 7, 9] total 11 [2019-10-22 11:22:02,281 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325203755] [2019-10-22 11:22:02,282 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-22 11:22:02,282 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-10-22 11:22:02,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-22 11:22:02,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2019-10-22 11:22:02,283 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 11 states. [2019-10-22 11:22:02,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 11:22:02,367 INFO L93 Difference]: Finished difference Result 24 states and 25 transitions. [2019-10-22 11:22:02,368 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-22 11:22:02,368 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 21 [2019-10-22 11:22:02,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 11:22:02,369 INFO L225 Difference]: With dead ends: 24 [2019-10-22 11:22:02,369 INFO L226 Difference]: Without dead ends: 20 [2019-10-22 11:22:02,370 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2019-10-22 11:22:02,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-10-22 11:22:02,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2019-10-22 11:22:02,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-10-22 11:22:02,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2019-10-22 11:22:02,374 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 21 [2019-10-22 11:22:02,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 11:22:02,375 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2019-10-22 11:22:02,375 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-22 11:22:02,375 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2019-10-22 11:22:02,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-10-22 11:22:02,376 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 11:22:02,376 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 11:22:02,777 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 cvc4 --incremental --print-success --lang smt --rewrite-divk,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 11:22:02,777 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 11:22:02,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 11:22:02,778 INFO L82 PathProgramCache]: Analyzing trace with hash -28473709, now seen corresponding path program 3 times [2019-10-22 11:22:02,778 INFO L157 tionRefinementEngine]: Executing refinement strategy WALRUS [2019-10-22 11:22:02,778 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [2060944138] [2019-10-22 11:22:02,778 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d81ea17c-9237-4fb8-b081-37ac9849b06f/bin/utaipan/cvc4 Starting monitored process 7 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-10-22 11:22:02,832 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-10-22 11:22:02,832 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 11:22:02,833 INFO L256 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 10 conjunts are in the unsatisfiable core [2019-10-22 11:22:02,835 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 11:22:02,909 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-22 11:22:02,910 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 11:22:03,138 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:22:03,203 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:22:03,235 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:22:03,253 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-22 11:22:03,253 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2060944138] [2019-10-22 11:22:03,253 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1485100852] [2019-10-22 11:22:03,253 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d81ea17c-9237-4fb8-b081-37ac9849b06f/bin/utaipan/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 11:22:03,282 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-10-22 11:22:03,282 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 11:22:03,285 INFO L256 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 10 conjunts are in the unsatisfiable core [2019-10-22 11:22:03,286 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 11:22:03,293 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-22 11:22:03,293 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 11:22:03,487 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:22:03,527 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:22:03,546 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:22:03,563 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-22 11:22:03,566 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-22 11:22:03,566 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11, 8, 11] total 13 [2019-10-22 11:22:03,566 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664063536] [2019-10-22 11:22:03,566 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-10-22 11:22:03,566 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-10-22 11:22:03,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-10-22 11:22:03,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2019-10-22 11:22:03,567 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 13 states. [2019-10-22 11:22:03,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 11:22:03,646 INFO L93 Difference]: Finished difference Result 27 states and 28 transitions. [2019-10-22 11:22:03,646 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-22 11:22:03,646 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 27 [2019-10-22 11:22:03,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 11:22:03,647 INFO L225 Difference]: With dead ends: 27 [2019-10-22 11:22:03,647 INFO L226 Difference]: Without dead ends: 23 [2019-10-22 11:22:03,648 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2019-10-22 11:22:03,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2019-10-22 11:22:03,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2019-10-22 11:22:03,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-10-22 11:22:03,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2019-10-22 11:22:03,653 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 27 [2019-10-22 11:22:03,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 11:22:03,654 INFO L462 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2019-10-22 11:22:03,654 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-10-22 11:22:03,654 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2019-10-22 11:22:03,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2019-10-22 11:22:03,655 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 11:22:03,655 INFO L380 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 11:22:04,056 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 cvc4 --incremental --print-success --lang smt --rewrite-divk,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 11:22:04,056 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 11:22:04,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 11:22:04,056 INFO L82 PathProgramCache]: Analyzing trace with hash -2080894167, now seen corresponding path program 4 times [2019-10-22 11:22:04,056 INFO L157 tionRefinementEngine]: Executing refinement strategy WALRUS [2019-10-22 11:22:04,057 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1981181763] [2019-10-22 11:22:04,057 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d81ea17c-9237-4fb8-b081-37ac9849b06f/bin/utaipan/cvc4 Starting monitored process 9 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-10-22 11:22:04,095 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-22 11:22:04,095 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 11:22:04,096 INFO L256 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 12 conjunts are in the unsatisfiable core [2019-10-22 11:22:04,097 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 11:22:04,165 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2019-10-22 11:22:04,166 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 11:22:04,413 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:22:04,497 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:22:04,564 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:22:04,596 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:22:04,615 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-22 11:22:04,615 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1981181763] [2019-10-22 11:22:04,615 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [945299396] [2019-10-22 11:22:04,615 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d81ea17c-9237-4fb8-b081-37ac9849b06f/bin/utaipan/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 11:22:04,656 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-22 11:22:04,656 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 11:22:04,657 INFO L256 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 12 conjunts are in the unsatisfiable core [2019-10-22 11:22:04,658 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 11:22:04,662 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2019-10-22 11:22:04,662 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 11:22:04,877 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:22:04,973 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:22:05,024 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:22:05,049 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:22:05,052 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-22 11:22:05,053 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-22 11:22:05,053 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13, 9, 13] total 15 [2019-10-22 11:22:05,053 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724256372] [2019-10-22 11:22:05,054 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-10-22 11:22:05,054 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-10-22 11:22:05,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-10-22 11:22:05,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2019-10-22 11:22:05,054 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand 15 states. [2019-10-22 11:22:05,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 11:22:05,188 INFO L93 Difference]: Finished difference Result 30 states and 31 transitions. [2019-10-22 11:22:05,189 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-22 11:22:05,189 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 33 [2019-10-22 11:22:05,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 11:22:05,190 INFO L225 Difference]: With dead ends: 30 [2019-10-22 11:22:05,190 INFO L226 Difference]: Without dead ends: 26 [2019-10-22 11:22:05,190 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=83, Invalid=297, Unknown=0, NotChecked=0, Total=380 [2019-10-22 11:22:05,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-10-22 11:22:05,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2019-10-22 11:22:05,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-10-22 11:22:05,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2019-10-22 11:22:05,194 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 33 [2019-10-22 11:22:05,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 11:22:05,195 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2019-10-22 11:22:05,195 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-10-22 11:22:05,195 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2019-10-22 11:22:05,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-10-22 11:22:05,196 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 11:22:05,196 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 11:22:05,597 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 cvc4 --incremental --print-success --lang smt --rewrite-divk,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 11:22:05,597 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 11:22:05,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 11:22:05,597 INFO L82 PathProgramCache]: Analyzing trace with hash -687460973, now seen corresponding path program 5 times [2019-10-22 11:22:05,598 INFO L157 tionRefinementEngine]: Executing refinement strategy WALRUS [2019-10-22 11:22:05,598 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1671518966] [2019-10-22 11:22:05,598 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d81ea17c-9237-4fb8-b081-37ac9849b06f/bin/utaipan/cvc4 Starting monitored process 11 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-10-22 11:22:05,671 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2019-10-22 11:22:05,671 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 11:22:05,672 INFO L256 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 14 conjunts are in the unsatisfiable core [2019-10-22 11:22:05,674 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 11:22:05,748 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2019-10-22 11:22:05,749 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 11:22:06,007 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:22:06,111 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:22:06,189 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:22:06,250 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:22:06,280 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:22:06,313 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-22 11:22:06,313 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1671518966] [2019-10-22 11:22:06,314 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1172250761] [2019-10-22 11:22:06,314 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d81ea17c-9237-4fb8-b081-37ac9849b06f/bin/utaipan/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 11:22:06,393 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2019-10-22 11:22:06,394 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 11:22:06,396 INFO L256 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 14 conjunts are in the unsatisfiable core [2019-10-22 11:22:06,397 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 11:22:06,407 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2019-10-22 11:22:06,408 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 11:22:06,673 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:22:06,746 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:22:06,803 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:22:06,838 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:22:06,856 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:22:06,860 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-22 11:22:06,860 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-22 11:22:06,861 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 15, 10, 15] total 17 [2019-10-22 11:22:06,861 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402471437] [2019-10-22 11:22:06,863 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-10-22 11:22:06,863 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-10-22 11:22:06,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-10-22 11:22:06,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2019-10-22 11:22:06,864 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand 17 states. [2019-10-22 11:22:07,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 11:22:07,019 INFO L93 Difference]: Finished difference Result 33 states and 34 transitions. [2019-10-22 11:22:07,023 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-22 11:22:07,024 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 39 [2019-10-22 11:22:07,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 11:22:07,025 INFO L225 Difference]: With dead ends: 33 [2019-10-22 11:22:07,025 INFO L226 Difference]: Without dead ends: 29 [2019-10-22 11:22:07,025 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 136 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=104, Invalid=402, Unknown=0, NotChecked=0, Total=506 [2019-10-22 11:22:07,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-10-22 11:22:07,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2019-10-22 11:22:07,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-10-22 11:22:07,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2019-10-22 11:22:07,034 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 39 [2019-10-22 11:22:07,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 11:22:07,034 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2019-10-22 11:22:07,034 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-10-22 11:22:07,034 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2019-10-22 11:22:07,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2019-10-22 11:22:07,035 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 11:22:07,037 INFO L380 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 11:22:07,438 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,11 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-10-22 11:22:07,438 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 11:22:07,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 11:22:07,438 INFO L82 PathProgramCache]: Analyzing trace with hash 547744169, now seen corresponding path program 6 times [2019-10-22 11:22:07,439 INFO L157 tionRefinementEngine]: Executing refinement strategy WALRUS [2019-10-22 11:22:07,439 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1215249122] [2019-10-22 11:22:07,439 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d81ea17c-9237-4fb8-b081-37ac9849b06f/bin/utaipan/cvc4 Starting monitored process 13 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-10-22 11:22:07,531 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-10-22 11:22:07,531 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 11:22:07,532 INFO L256 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 16 conjunts are in the unsatisfiable core [2019-10-22 11:22:07,533 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 11:22:07,611 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2019-10-22 11:22:07,611 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 11:22:07,947 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:22:08,050 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:22:08,134 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:22:08,221 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:22:08,269 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:22:08,299 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:22:08,318 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 93 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-10-22 11:22:08,318 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1215249122] [2019-10-22 11:22:08,318 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [96263054] [2019-10-22 11:22:08,319 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d81ea17c-9237-4fb8-b081-37ac9849b06f/bin/utaipan/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 11:22:08,369 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-10-22 11:22:08,369 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 11:22:08,371 INFO L256 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 16 conjunts are in the unsatisfiable core [2019-10-22 11:22:08,372 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 11:22:08,378 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2019-10-22 11:22:08,378 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 11:22:08,660 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:22:08,746 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:22:08,841 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:22:08,923 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:22:08,962 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:22:08,980 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:22:08,984 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 93 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-10-22 11:22:08,985 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-22 11:22:08,985 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 17, 11, 17] total 19 [2019-10-22 11:22:08,985 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769884106] [2019-10-22 11:22:08,986 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-10-22 11:22:08,986 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-10-22 11:22:08,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-10-22 11:22:08,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2019-10-22 11:22:08,986 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand 19 states. [2019-10-22 11:22:09,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 11:22:09,210 INFO L93 Difference]: Finished difference Result 36 states and 37 transitions. [2019-10-22 11:22:09,211 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-10-22 11:22:09,211 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 45 [2019-10-22 11:22:09,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 11:22:09,213 INFO L225 Difference]: With dead ends: 36 [2019-10-22 11:22:09,213 INFO L226 Difference]: Without dead ends: 32 [2019-10-22 11:22:09,214 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=127, Invalid=523, Unknown=0, NotChecked=0, Total=650 [2019-10-22 11:22:09,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-10-22 11:22:09,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2019-10-22 11:22:09,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-10-22 11:22:09,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2019-10-22 11:22:09,219 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 45 [2019-10-22 11:22:09,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 11:22:09,220 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2019-10-22 11:22:09,220 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-10-22 11:22:09,220 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2019-10-22 11:22:09,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2019-10-22 11:22:09,221 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 11:22:09,221 INFO L380 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 11:22:09,622 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,13 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-10-22 11:22:09,622 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 11:22:09,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 11:22:09,622 INFO L82 PathProgramCache]: Analyzing trace with hash -247823213, now seen corresponding path program 7 times [2019-10-22 11:22:09,623 INFO L157 tionRefinementEngine]: Executing refinement strategy WALRUS [2019-10-22 11:22:09,623 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [280653051] [2019-10-22 11:22:09,623 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d81ea17c-9237-4fb8-b081-37ac9849b06f/bin/utaipan/cvc4 Starting monitored process 15 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-10-22 11:22:09,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 11:22:09,711 INFO L256 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 18 conjunts are in the unsatisfiable core [2019-10-22 11:22:09,714 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 11:22:09,778 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2019-10-22 11:22:09,778 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 11:22:10,077 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:22:10,204 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:22:10,304 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:22:10,387 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:22:10,467 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:22:10,545 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:22:10,576 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:22:10,595 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2019-10-22 11:22:10,595 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [280653051] [2019-10-22 11:22:10,595 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [340780244] [2019-10-22 11:22:10,595 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d81ea17c-9237-4fb8-b081-37ac9849b06f/bin/utaipan/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 11:22:10,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 11:22:10,660 INFO L256 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 18 conjunts are in the unsatisfiable core [2019-10-22 11:22:10,661 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 11:22:10,665 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2019-10-22 11:22:10,665 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 11:22:10,937 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:22:11,042 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:22:11,143 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:22:11,217 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:22:11,296 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:22:11,331 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:22:11,348 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:22:11,355 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2019-10-22 11:22:11,355 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-22 11:22:11,355 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 19, 12, 19] total 21 [2019-10-22 11:22:11,355 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621105218] [2019-10-22 11:22:11,356 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-10-22 11:22:11,356 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-10-22 11:22:11,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-10-22 11:22:11,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2019-10-22 11:22:11,356 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand 21 states. [2019-10-22 11:22:11,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 11:22:11,529 INFO L93 Difference]: Finished difference Result 39 states and 40 transitions. [2019-10-22 11:22:11,530 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-22 11:22:11,530 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 51 [2019-10-22 11:22:11,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 11:22:11,531 INFO L225 Difference]: With dead ends: 39 [2019-10-22 11:22:11,531 INFO L226 Difference]: Without dead ends: 35 [2019-10-22 11:22:11,531 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 179 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=152, Invalid=660, Unknown=0, NotChecked=0, Total=812 [2019-10-22 11:22:11,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-10-22 11:22:11,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2019-10-22 11:22:11,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-10-22 11:22:11,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2019-10-22 11:22:11,536 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 51 [2019-10-22 11:22:11,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 11:22:11,537 INFO L462 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2019-10-22 11:22:11,537 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-10-22 11:22:11,537 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2019-10-22 11:22:11,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2019-10-22 11:22:11,537 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 11:22:11,537 INFO L380 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 11:22:11,938 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,15 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-10-22 11:22:11,938 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 11:22:11,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 11:22:11,938 INFO L82 PathProgramCache]: Analyzing trace with hash -1818636247, now seen corresponding path program 8 times [2019-10-22 11:22:11,939 INFO L157 tionRefinementEngine]: Executing refinement strategy WALRUS [2019-10-22 11:22:11,939 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1698490285] [2019-10-22 11:22:11,939 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d81ea17c-9237-4fb8-b081-37ac9849b06f/bin/utaipan/cvc4 Starting monitored process 17 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-10-22 11:22:12,048 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-22 11:22:12,048 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 11:22:12,049 INFO L256 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 20 conjunts are in the unsatisfiable core [2019-10-22 11:22:12,050 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 11:22:12,125 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2019-10-22 11:22:12,125 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 11:22:12,477 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:22:12,645 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:22:12,760 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:22:12,859 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:22:12,944 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:22:13,014 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:22:13,065 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:22:13,097 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:22:13,117 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 164 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-10-22 11:22:13,117 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1698490285] [2019-10-22 11:22:13,118 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1898892004] [2019-10-22 11:22:13,118 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d81ea17c-9237-4fb8-b081-37ac9849b06f/bin/utaipan/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 11:22:13,200 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-22 11:22:13,200 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 11:22:13,203 INFO L256 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 20 conjunts are in the unsatisfiable core [2019-10-22 11:22:13,204 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 11:22:13,210 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2019-10-22 11:22:13,210 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 11:22:13,525 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:22:13,669 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:22:13,789 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:22:13,878 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:22:13,948 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:22:14,000 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:22:14,065 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:22:14,089 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:22:14,093 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 164 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-10-22 11:22:14,093 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-22 11:22:14,094 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 21, 13, 21] total 23 [2019-10-22 11:22:14,094 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971775542] [2019-10-22 11:22:14,094 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-10-22 11:22:14,094 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-10-22 11:22:14,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-10-22 11:22:14,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2019-10-22 11:22:14,095 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand 23 states. [2019-10-22 11:22:14,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 11:22:14,260 INFO L93 Difference]: Finished difference Result 42 states and 43 transitions. [2019-10-22 11:22:14,263 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-22 11:22:14,264 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 57 [2019-10-22 11:22:14,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 11:22:14,264 INFO L225 Difference]: With dead ends: 42 [2019-10-22 11:22:14,265 INFO L226 Difference]: Without dead ends: 38 [2019-10-22 11:22:14,265 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 202 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=179, Invalid=813, Unknown=0, NotChecked=0, Total=992 [2019-10-22 11:22:14,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2019-10-22 11:22:14,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2019-10-22 11:22:14,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-10-22 11:22:14,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2019-10-22 11:22:14,273 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 57 [2019-10-22 11:22:14,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 11:22:14,273 INFO L462 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2019-10-22 11:22:14,273 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-10-22 11:22:14,273 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2019-10-22 11:22:14,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2019-10-22 11:22:14,274 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 11:22:14,274 INFO L380 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 11:22:14,676 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,17 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-10-22 11:22:14,676 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 11:22:14,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 11:22:14,677 INFO L82 PathProgramCache]: Analyzing trace with hash -2055304301, now seen corresponding path program 9 times [2019-10-22 11:22:14,677 INFO L157 tionRefinementEngine]: Executing refinement strategy WALRUS [2019-10-22 11:22:14,677 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1196619094] [2019-10-22 11:22:14,677 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d81ea17c-9237-4fb8-b081-37ac9849b06f/bin/utaipan/cvc4 Starting monitored process 19 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-10-22 11:22:14,857 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2019-10-22 11:22:14,857 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 11:22:14,858 INFO L256 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 22 conjunts are in the unsatisfiable core [2019-10-22 11:22:14,859 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 11:22:14,958 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2019-10-22 11:22:14,958 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 11:22:15,325 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:22:15,476 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:22:15,614 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:22:15,740 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:22:15,859 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:22:15,956 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:22:16,039 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:22:16,090 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:22:16,121 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:22:16,153 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 207 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2019-10-22 11:22:16,153 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1196619094] [2019-10-22 11:22:16,153 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [849906020] [2019-10-22 11:22:16,154 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d81ea17c-9237-4fb8-b081-37ac9849b06f/bin/utaipan/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 11:22:16,271 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2019-10-22 11:22:16,271 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 11:22:16,273 INFO L256 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 22 conjunts are in the unsatisfiable core [2019-10-22 11:22:16,275 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 11:22:16,282 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2019-10-22 11:22:16,283 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 11:22:16,684 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:22:16,824 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:22:16,943 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:22:17,045 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:22:17,131 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:22:17,212 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:22:17,262 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:22:17,294 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:22:17,309 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:22:17,316 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 207 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2019-10-22 11:22:17,316 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-22 11:22:17,316 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 23, 14, 23] total 25 [2019-10-22 11:22:17,317 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533142518] [2019-10-22 11:22:17,317 INFO L442 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-10-22 11:22:17,317 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-10-22 11:22:17,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-10-22 11:22:17,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=532, Unknown=0, NotChecked=0, Total=600 [2019-10-22 11:22:17,318 INFO L87 Difference]: Start difference. First operand 38 states and 39 transitions. Second operand 25 states. [2019-10-22 11:22:17,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 11:22:17,499 INFO L93 Difference]: Finished difference Result 45 states and 46 transitions. [2019-10-22 11:22:17,500 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-10-22 11:22:17,500 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 63 [2019-10-22 11:22:17,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 11:22:17,500 INFO L225 Difference]: With dead ends: 45 [2019-10-22 11:22:17,500 INFO L226 Difference]: Without dead ends: 41 [2019-10-22 11:22:17,501 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 219 SyntacticMatches, 6 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=208, Invalid=982, Unknown=0, NotChecked=0, Total=1190 [2019-10-22 11:22:17,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2019-10-22 11:22:17,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2019-10-22 11:22:17,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-10-22 11:22:17,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2019-10-22 11:22:17,506 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 63 [2019-10-22 11:22:17,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 11:22:17,506 INFO L462 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2019-10-22 11:22:17,507 INFO L463 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-10-22 11:22:17,507 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2019-10-22 11:22:17,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2019-10-22 11:22:17,508 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 11:22:17,508 INFO L380 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 11:22:17,908 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,19 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-10-22 11:22:17,909 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 11:22:17,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 11:22:17,909 INFO L82 PathProgramCache]: Analyzing trace with hash -1172322647, now seen corresponding path program 10 times [2019-10-22 11:22:17,909 INFO L157 tionRefinementEngine]: Executing refinement strategy WALRUS [2019-10-22 11:22:17,909 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1659443943] [2019-10-22 11:22:17,909 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d81ea17c-9237-4fb8-b081-37ac9849b06f/bin/utaipan/cvc4 Starting monitored process 21 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-10-22 11:22:18,061 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-22 11:22:18,061 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 11:22:18,063 INFO L256 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 25 conjunts are in the unsatisfiable core [2019-10-22 11:22:18,064 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 11:22:18,316 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2019-10-22 11:22:18,316 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 11:22:19,227 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2019-10-22 11:22:19,228 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1659443943] [2019-10-22 11:22:19,228 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1942200825] [2019-10-22 11:22:19,228 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d81ea17c-9237-4fb8-b081-37ac9849b06f/bin/utaipan/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 11:22:19,383 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-22 11:22:19,384 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 11:22:19,386 INFO L256 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 24 conjunts are in the unsatisfiable core [2019-10-22 11:22:19,387 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 11:22:19,412 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2019-10-22 11:22:19,413 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 11:22:20,441 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2019-10-22 11:22:20,442 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-22 11:22:20,442 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25, 25] total 25 [2019-10-22 11:22:20,442 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75395203] [2019-10-22 11:22:20,442 INFO L442 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-10-22 11:22:20,442 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-10-22 11:22:20,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-10-22 11:22:20,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2019-10-22 11:22:20,443 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand 25 states. [2019-10-22 11:22:20,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 11:22:20,652 INFO L93 Difference]: Finished difference Result 48 states and 49 transitions. [2019-10-22 11:22:20,653 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-10-22 11:22:20,653 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 69 [2019-10-22 11:22:20,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 11:22:20,654 INFO L225 Difference]: With dead ends: 48 [2019-10-22 11:22:20,654 INFO L226 Difference]: Without dead ends: 44 [2019-10-22 11:22:20,654 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 244 SyntacticMatches, 5 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2019-10-22 11:22:20,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2019-10-22 11:22:20,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2019-10-22 11:22:20,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-10-22 11:22:20,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 45 transitions. [2019-10-22 11:22:20,660 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 45 transitions. Word has length 69 [2019-10-22 11:22:20,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 11:22:20,660 INFO L462 AbstractCegarLoop]: Abstraction has 44 states and 45 transitions. [2019-10-22 11:22:20,660 INFO L463 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-10-22 11:22:20,660 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 45 transitions. [2019-10-22 11:22:20,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2019-10-22 11:22:20,661 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 11:22:20,662 INFO L380 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 11:22:21,066 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,21 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-10-22 11:22:21,067 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 11:22:21,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 11:22:21,067 INFO L82 PathProgramCache]: Analyzing trace with hash -1452916077, now seen corresponding path program 11 times [2019-10-22 11:22:21,067 INFO L157 tionRefinementEngine]: Executing refinement strategy WALRUS [2019-10-22 11:22:21,067 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1571336074] [2019-10-22 11:22:21,067 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d81ea17c-9237-4fb8-b081-37ac9849b06f/bin/utaipan/cvc4 Starting monitored process 23 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-10-22 11:22:21,316 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2019-10-22 11:22:21,316 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 11:22:21,318 INFO L256 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 24 conjunts are in the unsatisfiable core [2019-10-22 11:22:21,319 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 11:22:21,445 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 22 proven. 186 refuted. 0 times theorem prover too weak. 166 trivial. 0 not checked. [2019-10-22 11:22:21,445 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 11:22:23,239 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 22 proven. 286 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2019-10-22 11:22:23,239 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1571336074] [2019-10-22 11:22:23,239 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1386720788] [2019-10-22 11:22:23,239 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d81ea17c-9237-4fb8-b081-37ac9849b06f/bin/utaipan/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 11:22:23,426 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2019-10-22 11:22:23,426 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 11:22:23,429 INFO L256 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 26 conjunts are in the unsatisfiable core [2019-10-22 11:22:23,430 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 11:22:23,657 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2019-10-22 11:22:23,657 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 11:22:24,191 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:22:24,386 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:22:24,651 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:22:24,898 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:22:25,061 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:22:25,199 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:22:25,318 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:22:25,419 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:22:25,505 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:22:25,571 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:22:25,617 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:22:25,669 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 308 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2019-10-22 11:22:25,669 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-22 11:22:25,669 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 25, 16, 27] total 51 [2019-10-22 11:22:25,669 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228476729] [2019-10-22 11:22:25,669 INFO L442 AbstractCegarLoop]: Interpolant automaton has 51 states [2019-10-22 11:22:25,670 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-10-22 11:22:25,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2019-10-22 11:22:25,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=388, Invalid=2162, Unknown=0, NotChecked=0, Total=2550 [2019-10-22 11:22:25,671 INFO L87 Difference]: Start difference. First operand 44 states and 45 transitions. Second operand 51 states. [2019-10-22 11:22:26,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 11:22:26,073 INFO L93 Difference]: Finished difference Result 108 states and 229 transitions. [2019-10-22 11:22:26,074 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-10-22 11:22:26,074 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 75 [2019-10-22 11:22:26,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 11:22:26,075 INFO L225 Difference]: With dead ends: 108 [2019-10-22 11:22:26,075 INFO L226 Difference]: Without dead ends: 0 [2019-10-22 11:22:26,077 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 317 GetRequests, 251 SyntacticMatches, 6 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 959 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=795, Invalid=2987, Unknown=0, NotChecked=0, Total=3782 [2019-10-22 11:22:26,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-10-22 11:22:26,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-10-22 11:22:26,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-10-22 11:22:26,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-10-22 11:22:26,078 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 75 [2019-10-22 11:22:26,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 11:22:26,078 INFO L462 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-10-22 11:22:26,079 INFO L463 AbstractCegarLoop]: Interpolant automaton has 51 states. [2019-10-22 11:22:26,079 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-10-22 11:22:26,079 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-10-22 11:22:26,480 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,23 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-10-22 11:22:26,483 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2019-10-22 11:22:26,722 WARN L191 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 50 [2019-10-22 11:22:26,724 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2019-10-22 11:22:26,724 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2019-10-22 11:22:26,724 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2019-10-22 11:22:26,724 INFO L443 ceAbstractionStarter]: For program point L13(line 13) no Hoare annotation was computed. [2019-10-22 11:22:26,724 INFO L443 ceAbstractionStarter]: For program point L12(lines 12 14) no Hoare annotation was computed. [2019-10-22 11:22:26,724 INFO L439 ceAbstractionStarter]: At program point L11(line 11) the Hoare annotation is: (= (bvadd ULTIMATE.start_main_~input~0 (_ bv4294967286 32)) (_ bv0 32)) [2019-10-22 11:22:26,725 INFO L443 ceAbstractionStarter]: For program point L11-1(line 11) no Hoare annotation was computed. [2019-10-22 11:22:26,725 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 13) no Hoare annotation was computed. [2019-10-22 11:22:26,725 INFO L443 ceAbstractionStarter]: For program point L9(lines 9 15) no Hoare annotation was computed. [2019-10-22 11:22:26,725 INFO L443 ceAbstractionStarter]: For program point idFINAL(lines 4 7) no Hoare annotation was computed. [2019-10-22 11:22:26,725 INFO L443 ceAbstractionStarter]: For program point idEXIT(lines 4 7) no Hoare annotation was computed. [2019-10-22 11:22:26,725 INFO L446 ceAbstractionStarter]: At program point idENTRY(lines 4 7) the Hoare annotation is: true [2019-10-22 11:22:26,726 INFO L439 ceAbstractionStarter]: At program point L6(line 6) the Hoare annotation is: (let ((.cse0 (= id_~x |id_#in~x|))) (and (or .cse0 (not (= (_ bv3 32) |id_#in~x|))) (or (not (= (_ bv6 32) |id_#in~x|)) .cse0) (or (not (= (_ bv5 32) |id_#in~x|)) .cse0) (or .cse0 (not (= (bvadd |id_#in~x| (_ bv4294967286 32)) (_ bv0 32)))) (or .cse0 (not (= (bvadd |id_#in~x| (_ bv4294967289 32)) (_ bv0 32)))) (or .cse0 (not (= (_ bv2 32) |id_#in~x|))) (not (= (_ bv0 32) |id_#in~x|)) (or .cse0 (not (= (_ bv1 32) |id_#in~x|))) (or .cse0 (not (= (_ bv4 32) |id_#in~x|))) (or .cse0 (not (= (_ bv9 32) |id_#in~x|))) (or (not (= (bvadd |id_#in~x| (_ bv4294967288 32)) (_ bv0 32))) .cse0))) [2019-10-22 11:22:26,726 INFO L443 ceAbstractionStarter]: For program point L5(line 5) no Hoare annotation was computed. [2019-10-22 11:22:26,726 INFO L443 ceAbstractionStarter]: For program point L6-1(line 6) no Hoare annotation was computed. [2019-10-22 11:22:26,729 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.10 11:22:26 BoogieIcfgContainer [2019-10-22 11:22:26,729 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-10-22 11:22:26,729 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-10-22 11:22:26,729 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-10-22 11:22:26,730 INFO L275 PluginConnector]: Witness Printer initialized [2019-10-22 11:22:26,730 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 11:21:59" (3/4) ... [2019-10-22 11:22:26,734 INFO L137 WitnessPrinter]: Generating witness for correct program [2019-10-22 11:22:26,741 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure id [2019-10-22 11:22:26,748 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2019-10-22 11:22:26,748 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2019-10-22 11:22:26,804 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_d81ea17c-9237-4fb8-b081-37ac9849b06f/bin/utaipan/witness.graphml [2019-10-22 11:22:26,804 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-10-22 11:22:26,805 INFO L168 Benchmark]: Toolchain (without parser) took 27651.77 ms. Allocated memory was 1.0 GB in the beginning and 1.5 GB in the end (delta: 436.7 MB). Free memory was 949.6 MB in the beginning and 1.4 GB in the end (delta: -477.4 MB). Peak memory consumption was 524.8 MB. Max. memory is 11.5 GB. [2019-10-22 11:22:26,806 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 1.0 GB. Free memory is still 977.8 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-10-22 11:22:26,806 INFO L168 Benchmark]: CACSL2BoogieTranslator took 257.00 ms. Allocated memory is still 1.0 GB. Free memory was 949.6 MB in the beginning and 938.9 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2019-10-22 11:22:26,806 INFO L168 Benchmark]: Boogie Procedure Inliner took 36.20 ms. Allocated memory is still 1.0 GB. Free memory is still 938.9 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-10-22 11:22:26,807 INFO L168 Benchmark]: Boogie Preprocessor took 132.85 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 184.0 MB). Free memory was 938.9 MB in the beginning and 1.2 GB in the end (delta: -240.9 MB). Peak memory consumption was 12.6 MB. Max. memory is 11.5 GB. [2019-10-22 11:22:26,807 INFO L168 Benchmark]: RCFGBuilder took 199.79 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: 20.1 MB). Peak memory consumption was 20.1 MB. Max. memory is 11.5 GB. [2019-10-22 11:22:26,807 INFO L168 Benchmark]: TraceAbstraction took 26946.72 ms. Allocated memory was 1.2 GB in the beginning and 1.5 GB in the end (delta: 249.0 MB). Free memory was 1.2 GB in the beginning and 857.9 MB in the end (delta: 301.8 MB). Peak memory consumption was 550.8 MB. Max. memory is 11.5 GB. [2019-10-22 11:22:26,808 INFO L168 Benchmark]: Witness Printer took 75.01 ms. Allocated memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: 3.7 MB). Free memory was 857.9 MB in the beginning and 1.4 GB in the end (delta: -569.2 MB). There was no memory consumed. Max. memory is 11.5 GB. [2019-10-22 11:22:26,810 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 1.0 GB. Free memory is still 977.8 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 257.00 ms. Allocated memory is still 1.0 GB. Free memory was 949.6 MB in the beginning and 938.9 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 36.20 ms. Allocated memory is still 1.0 GB. Free memory is still 938.9 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 132.85 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 184.0 MB). Free memory was 938.9 MB in the beginning and 1.2 GB in the end (delta: -240.9 MB). Peak memory consumption was 12.6 MB. Max. memory is 11.5 GB. * RCFGBuilder took 199.79 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: 20.1 MB). Peak memory consumption was 20.1 MB. Max. memory is 11.5 GB. * TraceAbstraction took 26946.72 ms. Allocated memory was 1.2 GB in the beginning and 1.5 GB in the end (delta: 249.0 MB). Free memory was 1.2 GB in the beginning and 857.9 MB in the end (delta: 301.8 MB). Peak memory consumption was 550.8 MB. Max. memory is 11.5 GB. * Witness Printer took 75.01 ms. Allocated memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: 3.7 MB). Free memory was 857.9 MB in the beginning and 1.4 GB in the end (delta: -569.2 MB). There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 13]: 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 2 procedures, 15 locations, 1 error locations. Result: SAFE, OverallTime: 26.8s, OverallIterations: 12, TraceHistogramMax: 12, AutomataDifference: 2.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.2s, HoareTripleCheckerStatistics: 238 SDtfs, 859 SDslu, 1918 SDs, 0 SdLazy, 1815 SolverSat, 392 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2028 GetRequests, 1729 SyntacticMatches, 21 SemanticMatches, 278 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1363 ImplicationChecksByTransitivity, 3.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=44occurred in iteration=11, 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, 12 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 3 LocationsWithAnnotation, 25 PreInvPairs, 25 NumberOfFragments, 97 HoareAnnotationTreeSize, 25 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 3 FomulaSimplificationsInter, 46 FormulaSimplificationTreeSizeReductionInter, 0.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 17.6s InterpolantComputationTime, 999 NumberOfCodeBlocks, 999 NumberOfCodeBlocksAsserted, 95 NumberOfCheckSat, 1952 ConstructedInterpolants, 0 QuantifiedInterpolants, 370586 SizeOfPredicates, 153 NumberOfNonLiveVariables, 1378 ConjunctsInSsa, 355 ConjunctsInUnsatCore, 46 InterpolantComputations, 2 PerfectInterpolantSequences, 2379/6336 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...