./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive-simple/id_i25_o25-2.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_43ac67a8-5711-4c16-9aa6-a88a40fd9dfb/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_43ac67a8-5711-4c16-9aa6-a88a40fd9dfb/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_43ac67a8-5711-4c16-9aa6-a88a40fd9dfb/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_43ac67a8-5711-4c16-9aa6-a88a40fd9dfb/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive-simple/id_i25_o25-2.c -s /tmp/vcloud-vcloud-master/worker/working_dir_43ac67a8-5711-4c16-9aa6-a88a40fd9dfb/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_43ac67a8-5711-4c16-9aa6-a88a40fd9dfb/bin/uautomizer --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash a544811fe2a74801350302afc46fb67e1c6f238a ....................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.1.24-cad4683 [2019-10-22 08:56:18,517 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-22 08:56:18,518 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-22 08:56:18,527 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-22 08:56:18,527 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-22 08:56:18,528 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-22 08:56:18,529 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-22 08:56:18,530 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-22 08:56:18,532 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-22 08:56:18,532 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-22 08:56:18,533 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-22 08:56:18,534 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-22 08:56:18,534 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-22 08:56:18,535 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-22 08:56:18,535 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-22 08:56:18,536 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-22 08:56:18,541 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-22 08:56:18,542 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-22 08:56:18,543 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-22 08:56:18,544 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-22 08:56:18,545 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-22 08:56:18,546 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-22 08:56:18,547 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-22 08:56:18,547 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-22 08:56:18,549 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-22 08:56:18,549 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-22 08:56:18,549 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-22 08:56:18,550 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-22 08:56:18,550 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-22 08:56:18,555 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-22 08:56:18,555 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-22 08:56:18,556 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-22 08:56:18,556 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-22 08:56:18,557 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-22 08:56:18,558 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-22 08:56:18,558 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-22 08:56:18,558 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-22 08:56:18,558 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-22 08:56:18,559 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-22 08:56:18,559 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-22 08:56:18,560 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-22 08:56:18,560 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_43ac67a8-5711-4c16-9aa6-a88a40fd9dfb/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-22 08:56:18,570 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-22 08:56:18,570 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-22 08:56:18,573 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-22 08:56:18,573 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-22 08:56:18,573 INFO L138 SettingsManager]: * Use SBE=true [2019-10-22 08:56:18,573 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-22 08:56:18,574 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-22 08:56:18,574 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-22 08:56:18,574 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-22 08:56:18,574 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-22 08:56:18,574 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-22 08:56:18,574 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-22 08:56:18,575 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-22 08:56:18,575 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-22 08:56:18,575 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-22 08:56:18,575 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-22 08:56:18,575 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-22 08:56:18,575 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-22 08:56:18,576 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-22 08:56:18,576 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-22 08:56:18,576 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-22 08:56:18,576 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-22 08:56:18,576 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-22 08:56:18,577 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-22 08:56:18,577 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-22 08:56:18,577 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-22 08:56:18,577 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-22 08:56:18,577 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-22 08:56:18,577 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/working_dir_43ac67a8-5711-4c16-9aa6-a88a40fd9dfb/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a544811fe2a74801350302afc46fb67e1c6f238a [2019-10-22 08:56:18,603 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-22 08:56:18,615 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-22 08:56:18,621 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-22 08:56:18,622 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-22 08:56:18,622 INFO L275 PluginConnector]: CDTParser initialized [2019-10-22 08:56:18,623 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_43ac67a8-5711-4c16-9aa6-a88a40fd9dfb/bin/uautomizer/../../sv-benchmarks/c/recursive-simple/id_i25_o25-2.c [2019-10-22 08:56:18,680 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_43ac67a8-5711-4c16-9aa6-a88a40fd9dfb/bin/uautomizer/data/b5d096ace/31a241dadd404cbbbed1410462ec5020/FLAGc548028f4 [2019-10-22 08:56:19,104 INFO L306 CDTParser]: Found 1 translation units. [2019-10-22 08:56:19,105 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_43ac67a8-5711-4c16-9aa6-a88a40fd9dfb/sv-benchmarks/c/recursive-simple/id_i25_o25-2.c [2019-10-22 08:56:19,110 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_43ac67a8-5711-4c16-9aa6-a88a40fd9dfb/bin/uautomizer/data/b5d096ace/31a241dadd404cbbbed1410462ec5020/FLAGc548028f4 [2019-10-22 08:56:19,125 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_43ac67a8-5711-4c16-9aa6-a88a40fd9dfb/bin/uautomizer/data/b5d096ace/31a241dadd404cbbbed1410462ec5020 [2019-10-22 08:56:19,128 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-22 08:56:19,130 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-10-22 08:56:19,131 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-22 08:56:19,131 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-22 08:56:19,134 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-22 08:56:19,138 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 08:56:19" (1/1) ... [2019-10-22 08:56:19,140 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@111a1454 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:56:19, skipping insertion in model container [2019-10-22 08:56:19,141 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 08:56:19" (1/1) ... [2019-10-22 08:56:19,150 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-22 08:56:19,166 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-22 08:56:19,341 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-22 08:56:19,345 INFO L188 MainTranslator]: Completed pre-run [2019-10-22 08:56:19,458 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-22 08:56:19,473 INFO L192 MainTranslator]: Completed translation [2019-10-22 08:56:19,474 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:56:19 WrapperNode [2019-10-22 08:56:19,474 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-22 08:56:19,474 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-10-22 08:56:19,475 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-10-22 08:56:19,475 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-10-22 08:56:19,484 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:56:19" (1/1) ... [2019-10-22 08:56:19,489 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:56:19" (1/1) ... [2019-10-22 08:56:19,507 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-10-22 08:56:19,508 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-22 08:56:19,508 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-22 08:56:19,508 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-22 08:56:19,517 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:56:19" (1/1) ... [2019-10-22 08:56:19,518 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:56:19" (1/1) ... [2019-10-22 08:56:19,518 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:56:19" (1/1) ... [2019-10-22 08:56:19,518 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:56:19" (1/1) ... [2019-10-22 08:56:19,521 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:56:19" (1/1) ... [2019-10-22 08:56:19,523 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:56:19" (1/1) ... [2019-10-22 08:56:19,524 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:56:19" (1/1) ... [2019-10-22 08:56:19,525 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-22 08:56:19,526 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-22 08:56:19,526 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-22 08:56:19,527 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-22 08:56:19,528 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:56:19" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_43ac67a8-5711-4c16-9aa6-a88a40fd9dfb/bin/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-22 08:56:19,593 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-22 08:56:19,593 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-22 08:56:19,593 INFO L130 BoogieDeclarations]: Found specification of procedure id [2019-10-22 08:56:19,593 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2019-10-22 08:56:19,731 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-22 08:56:19,731 INFO L284 CfgBuilder]: Removed 4 assume(true) statements. [2019-10-22 08:56:19,732 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 08:56:19 BoogieIcfgContainer [2019-10-22 08:56:19,733 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-22 08:56:19,733 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-22 08:56:19,734 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-22 08:56:19,737 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-22 08:56:19,737 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.10 08:56:19" (1/3) ... [2019-10-22 08:56:19,738 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51849356 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 08:56:19, skipping insertion in model container [2019-10-22 08:56:19,738 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:56:19" (2/3) ... [2019-10-22 08:56:19,739 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51849356 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 08:56:19, skipping insertion in model container [2019-10-22 08:56:19,739 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 08:56:19" (3/3) ... [2019-10-22 08:56:19,741 INFO L109 eAbstractionObserver]: Analyzing ICFG id_i25_o25-2.c [2019-10-22 08:56:19,751 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-22 08:56:19,758 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-22 08:56:19,770 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-22 08:56:19,794 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-22 08:56:19,794 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-22 08:56:19,795 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-22 08:56:19,795 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-22 08:56:19,795 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-22 08:56:19,795 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-22 08:56:19,796 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-22 08:56:19,796 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-22 08:56:19,814 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states. [2019-10-22 08:56:19,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-10-22 08:56:19,821 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 08:56:19,822 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 08:56:19,824 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 08:56:19,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:56:19,830 INFO L82 PathProgramCache]: Analyzing trace with hash 389977641, now seen corresponding path program 1 times [2019-10-22 08:56:19,839 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:56:19,840 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395624678] [2019-10-22 08:56:19,840 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:56:19,840 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:56:19,840 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:56:19,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:20,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:20,116 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 08:56:20,117 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395624678] [2019-10-22 08:56:20,118 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-22 08:56:20,118 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-10-22 08:56:20,118 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85253196] [2019-10-22 08:56:20,122 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-22 08:56:20,122 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 08:56:20,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-22 08:56:20,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-10-22 08:56:20,137 INFO L87 Difference]: Start difference. First operand 15 states. Second operand 7 states. [2019-10-22 08:56:20,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 08:56:20,252 INFO L93 Difference]: Finished difference Result 24 states and 27 transitions. [2019-10-22 08:56:20,253 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-22 08:56:20,254 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 9 [2019-10-22 08:56:20,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 08:56:20,262 INFO L225 Difference]: With dead ends: 24 [2019-10-22 08:56:20,263 INFO L226 Difference]: Without dead ends: 14 [2019-10-22 08:56:20,266 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2019-10-22 08:56:20,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2019-10-22 08:56:20,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2019-10-22 08:56:20,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2019-10-22 08:56:20,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2019-10-22 08:56:20,306 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 9 [2019-10-22 08:56:20,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 08:56:20,307 INFO L462 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2019-10-22 08:56:20,307 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-22 08:56:20,308 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2019-10-22 08:56:20,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-10-22 08:56:20,309 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 08:56:20,309 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 08:56:20,309 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 08:56:20,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:56:20,310 INFO L82 PathProgramCache]: Analyzing trace with hash -881029229, now seen corresponding path program 1 times [2019-10-22 08:56:20,310 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:56:20,310 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984388000] [2019-10-22 08:56:20,310 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:56:20,310 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:56:20,311 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:56:20,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:20,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:20,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:20,444 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-22 08:56:20,444 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984388000] [2019-10-22 08:56:20,444 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1153462827] [2019-10-22 08:56:20,444 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_43ac67a8-5711-4c16-9aa6-a88a40fd9dfb/bin/uautomizer/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 08:56:20,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:20,474 INFO L256 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-22 08:56:20,478 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 08:56:20,533 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-22 08:56:20,533 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 08:56:20,533 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 10 [2019-10-22 08:56:20,534 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081328043] [2019-10-22 08:56:20,535 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-22 08:56:20,535 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 08:56:20,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-22 08:56:20,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2019-10-22 08:56:20,536 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 10 states. [2019-10-22 08:56:20,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 08:56:20,638 INFO L93 Difference]: Finished difference Result 21 states and 22 transitions. [2019-10-22 08:56:20,640 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-22 08:56:20,640 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 15 [2019-10-22 08:56:20,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 08:56:20,641 INFO L225 Difference]: With dead ends: 21 [2019-10-22 08:56:20,641 INFO L226 Difference]: Without dead ends: 17 [2019-10-22 08:56:20,642 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2019-10-22 08:56:20,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2019-10-22 08:56:20,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2019-10-22 08:56:20,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-10-22 08:56:20,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2019-10-22 08:56:20,646 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 15 [2019-10-22 08:56:20,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 08:56:20,646 INFO L462 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2019-10-22 08:56:20,646 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-22 08:56:20,646 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2019-10-22 08:56:20,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-10-22 08:56:20,647 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 08:56:20,647 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 08:56:20,848 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 08:56:20,848 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 08:56:20,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:56:20,848 INFO L82 PathProgramCache]: Analyzing trace with hash -1824240471, now seen corresponding path program 2 times [2019-10-22 08:56:20,849 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:56:20,849 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247096697] [2019-10-22 08:56:20,849 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:56:20,849 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:56:20,849 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:56:20,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:20,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:20,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:20,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:20,987 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 08:56:20,987 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247096697] [2019-10-22 08:56:20,987 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1070408959] [2019-10-22 08:56:20,988 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_43ac67a8-5711-4c16-9aa6-a88a40fd9dfb/bin/uautomizer/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 08:56:21,017 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-22 08:56:21,017 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 08:56:21,018 INFO L256 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-22 08:56:21,019 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 08:56:21,051 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 08:56:21,051 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 08:56:21,051 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 11 [2019-10-22 08:56:21,051 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283929393] [2019-10-22 08:56:21,052 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-22 08:56:21,052 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 08:56:21,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-22 08:56:21,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2019-10-22 08:56:21,053 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 11 states. [2019-10-22 08:56:21,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 08:56:21,210 INFO L93 Difference]: Finished difference Result 24 states and 25 transitions. [2019-10-22 08:56:21,211 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-22 08:56:21,211 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 21 [2019-10-22 08:56:21,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 08:56:21,211 INFO L225 Difference]: With dead ends: 24 [2019-10-22 08:56:21,211 INFO L226 Difference]: Without dead ends: 20 [2019-10-22 08:56:21,212 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2019-10-22 08:56:21,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-10-22 08:56:21,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2019-10-22 08:56:21,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-10-22 08:56:21,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2019-10-22 08:56:21,215 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 21 [2019-10-22 08:56:21,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 08:56:21,215 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2019-10-22 08:56:21,215 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-22 08:56:21,215 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2019-10-22 08:56:21,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-10-22 08:56:21,216 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 08:56:21,216 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 08:56:21,416 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 08:56:21,417 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 08:56:21,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:56:21,417 INFO L82 PathProgramCache]: Analyzing trace with hash -28473709, now seen corresponding path program 3 times [2019-10-22 08:56:21,417 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:56:21,417 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851701054] [2019-10-22 08:56:21,418 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:56:21,418 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:56:21,418 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:56:21,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:21,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:21,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:21,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:21,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:21,549 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 08:56:21,550 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851701054] [2019-10-22 08:56:21,550 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1132754106] [2019-10-22 08:56:21,550 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_43ac67a8-5711-4c16-9aa6-a88a40fd9dfb/bin/uautomizer/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 08:56:21,583 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-10-22 08:56:21,583 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 08:56:21,584 INFO L256 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 10 conjunts are in the unsatisfiable core [2019-10-22 08:56:21,585 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 08:56:21,616 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 08:56:21,616 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 08:56:21,616 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 12 [2019-10-22 08:56:21,616 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704361163] [2019-10-22 08:56:21,617 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-22 08:56:21,617 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 08:56:21,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-22 08:56:21,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2019-10-22 08:56:21,618 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 12 states. [2019-10-22 08:56:21,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 08:56:21,691 INFO L93 Difference]: Finished difference Result 27 states and 28 transitions. [2019-10-22 08:56:21,691 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-22 08:56:21,692 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 27 [2019-10-22 08:56:21,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 08:56:21,692 INFO L225 Difference]: With dead ends: 27 [2019-10-22 08:56:21,693 INFO L226 Difference]: Without dead ends: 23 [2019-10-22 08:56:21,693 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2019-10-22 08:56:21,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2019-10-22 08:56:21,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2019-10-22 08:56:21,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-10-22 08:56:21,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2019-10-22 08:56:21,697 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 27 [2019-10-22 08:56:21,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 08:56:21,698 INFO L462 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2019-10-22 08:56:21,698 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-22 08:56:21,698 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2019-10-22 08:56:21,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2019-10-22 08:56:21,700 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 08:56:21,700 INFO L380 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 08:56:21,901 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 08:56:21,901 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 08:56:21,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:56:21,902 INFO L82 PathProgramCache]: Analyzing trace with hash -2080894167, now seen corresponding path program 4 times [2019-10-22 08:56:21,902 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:56:21,902 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001524434] [2019-10-22 08:56:21,902 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:56:21,902 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:56:21,902 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:56:21,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:21,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:21,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:22,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:22,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:22,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:22,085 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 08:56:22,085 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001524434] [2019-10-22 08:56:22,086 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2012178714] [2019-10-22 08:56:22,086 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_43ac67a8-5711-4c16-9aa6-a88a40fd9dfb/bin/uautomizer/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 08:56:22,119 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-22 08:56:22,120 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 08:56:22,121 INFO L256 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 12 conjunts are in the unsatisfiable core [2019-10-22 08:56:22,126 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 08:56:22,166 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 08:56:22,166 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 08:56:22,166 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 13 [2019-10-22 08:56:22,167 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260857201] [2019-10-22 08:56:22,167 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-10-22 08:56:22,167 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 08:56:22,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-10-22 08:56:22,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2019-10-22 08:56:22,168 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand 13 states. [2019-10-22 08:56:22,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 08:56:22,249 INFO L93 Difference]: Finished difference Result 30 states and 31 transitions. [2019-10-22 08:56:22,249 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-22 08:56:22,250 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 33 [2019-10-22 08:56:22,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 08:56:22,251 INFO L225 Difference]: With dead ends: 30 [2019-10-22 08:56:22,251 INFO L226 Difference]: Without dead ends: 26 [2019-10-22 08:56:22,251 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2019-10-22 08:56:22,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-10-22 08:56:22,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2019-10-22 08:56:22,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-10-22 08:56:22,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2019-10-22 08:56:22,256 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 33 [2019-10-22 08:56:22,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 08:56:22,256 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2019-10-22 08:56:22,257 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-10-22 08:56:22,257 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2019-10-22 08:56:22,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-10-22 08:56:22,258 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 08:56:22,258 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 08:56:22,459 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 08:56:22,459 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 08:56:22,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:56:22,459 INFO L82 PathProgramCache]: Analyzing trace with hash -687460973, now seen corresponding path program 5 times [2019-10-22 08:56:22,460 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:56:22,460 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687900271] [2019-10-22 08:56:22,460 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:56:22,460 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:56:22,460 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:56:22,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:22,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:22,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:22,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:22,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:22,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:22,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:22,691 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 08:56:22,692 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687900271] [2019-10-22 08:56:22,692 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1081847317] [2019-10-22 08:56:22,692 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_43ac67a8-5711-4c16-9aa6-a88a40fd9dfb/bin/uautomizer/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 08:56:22,724 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2019-10-22 08:56:22,725 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 08:56:22,726 INFO L256 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2019-10-22 08:56:22,727 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 08:56:22,776 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 08:56:22,776 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 08:56:22,776 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 14 [2019-10-22 08:56:22,776 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644709109] [2019-10-22 08:56:22,777 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-10-22 08:56:22,777 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 08:56:22,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-10-22 08:56:22,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2019-10-22 08:56:22,777 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand 14 states. [2019-10-22 08:56:22,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 08:56:22,865 INFO L93 Difference]: Finished difference Result 33 states and 34 transitions. [2019-10-22 08:56:22,866 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-22 08:56:22,866 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 39 [2019-10-22 08:56:22,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 08:56:22,867 INFO L225 Difference]: With dead ends: 33 [2019-10-22 08:56:22,867 INFO L226 Difference]: Without dead ends: 29 [2019-10-22 08:56:22,868 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=108, Invalid=272, Unknown=0, NotChecked=0, Total=380 [2019-10-22 08:56:22,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-10-22 08:56:22,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2019-10-22 08:56:22,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-10-22 08:56:22,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2019-10-22 08:56:22,873 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 39 [2019-10-22 08:56:22,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 08:56:22,873 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2019-10-22 08:56:22,873 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-10-22 08:56:22,874 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2019-10-22 08:56:22,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2019-10-22 08:56:22,874 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 08:56:22,875 INFO L380 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 08:56:23,075 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 08:56:23,076 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 08:56:23,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:56:23,076 INFO L82 PathProgramCache]: Analyzing trace with hash 547744169, now seen corresponding path program 6 times [2019-10-22 08:56:23,076 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:56:23,076 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893300431] [2019-10-22 08:56:23,077 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:56:23,077 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:56:23,077 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:56:23,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:23,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:23,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:23,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:23,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:23,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:23,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:23,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:23,284 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 08:56:23,285 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893300431] [2019-10-22 08:56:23,285 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [141934029] [2019-10-22 08:56:23,285 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_43ac67a8-5711-4c16-9aa6-a88a40fd9dfb/bin/uautomizer/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 08:56:23,321 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-10-22 08:56:23,321 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 08:56:23,322 INFO L256 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2019-10-22 08:56:23,324 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 08:56:23,596 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 08:56:23,597 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 08:56:23,597 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 17] total 28 [2019-10-22 08:56:23,597 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842860880] [2019-10-22 08:56:23,597 INFO L442 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-10-22 08:56:23,598 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 08:56:23,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-10-22 08:56:23,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=644, Unknown=0, NotChecked=0, Total=756 [2019-10-22 08:56:23,598 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand 28 states. [2019-10-22 08:56:23,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 08:56:23,891 INFO L93 Difference]: Finished difference Result 36 states and 37 transitions. [2019-10-22 08:56:23,891 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-10-22 08:56:23,891 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 45 [2019-10-22 08:56:23,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 08:56:23,892 INFO L225 Difference]: With dead ends: 36 [2019-10-22 08:56:23,892 INFO L226 Difference]: Without dead ends: 32 [2019-10-22 08:56:23,893 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=285, Invalid=1355, Unknown=0, NotChecked=0, Total=1640 [2019-10-22 08:56:23,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-10-22 08:56:23,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2019-10-22 08:56:23,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-10-22 08:56:23,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2019-10-22 08:56:23,903 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 45 [2019-10-22 08:56:23,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 08:56:23,903 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2019-10-22 08:56:23,903 INFO L463 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-10-22 08:56:23,903 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2019-10-22 08:56:23,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2019-10-22 08:56:23,904 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 08:56:23,904 INFO L380 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 08:56:24,106 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 08:56:24,107 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 08:56:24,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:56:24,107 INFO L82 PathProgramCache]: Analyzing trace with hash -247823213, now seen corresponding path program 7 times [2019-10-22 08:56:24,107 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:56:24,107 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839861352] [2019-10-22 08:56:24,108 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:56:24,108 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:56:24,108 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:56:24,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:24,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:24,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:24,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:24,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:24,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:24,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:24,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:24,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:24,312 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 08:56:24,312 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839861352] [2019-10-22 08:56:24,312 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1357458169] [2019-10-22 08:56:24,313 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_43ac67a8-5711-4c16-9aa6-a88a40fd9dfb/bin/uautomizer/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 08:56:24,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:24,344 INFO L256 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2019-10-22 08:56:24,346 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 08:56:24,396 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 08:56:24,396 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 08:56:24,396 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 16 [2019-10-22 08:56:24,396 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929761012] [2019-10-22 08:56:24,397 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-10-22 08:56:24,397 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 08:56:24,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-10-22 08:56:24,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2019-10-22 08:56:24,398 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand 16 states. [2019-10-22 08:56:24,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 08:56:24,517 INFO L93 Difference]: Finished difference Result 39 states and 40 transitions. [2019-10-22 08:56:24,518 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-22 08:56:24,518 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 51 [2019-10-22 08:56:24,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 08:56:24,519 INFO L225 Difference]: With dead ends: 39 [2019-10-22 08:56:24,519 INFO L226 Difference]: Without dead ends: 35 [2019-10-22 08:56:24,519 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=163, Invalid=389, Unknown=0, NotChecked=0, Total=552 [2019-10-22 08:56:24,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-10-22 08:56:24,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2019-10-22 08:56:24,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-10-22 08:56:24,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2019-10-22 08:56:24,524 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 51 [2019-10-22 08:56:24,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 08:56:24,525 INFO L462 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2019-10-22 08:56:24,525 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-10-22 08:56:24,525 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2019-10-22 08:56:24,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2019-10-22 08:56:24,526 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 08:56:24,526 INFO L380 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 08:56:24,727 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 08:56:24,727 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 08:56:24,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:56:24,727 INFO L82 PathProgramCache]: Analyzing trace with hash -1818636247, now seen corresponding path program 8 times [2019-10-22 08:56:24,727 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:56:24,728 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214148966] [2019-10-22 08:56:24,728 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:56:24,728 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:56:24,728 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:56:24,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:24,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:24,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:24,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:24,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:24,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:24,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:24,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:24,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:24,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:24,924 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 08:56:24,924 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214148966] [2019-10-22 08:56:24,924 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [59345760] [2019-10-22 08:56:24,924 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_43ac67a8-5711-4c16-9aa6-a88a40fd9dfb/bin/uautomizer/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 08:56:24,962 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-22 08:56:24,962 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 08:56:24,963 INFO L256 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2019-10-22 08:56:24,965 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 08:56:25,009 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 08:56:25,010 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 08:56:25,010 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 17 [2019-10-22 08:56:25,010 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481279336] [2019-10-22 08:56:25,011 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-10-22 08:56:25,011 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 08:56:25,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-10-22 08:56:25,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2019-10-22 08:56:25,012 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand 17 states. [2019-10-22 08:56:25,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 08:56:25,134 INFO L93 Difference]: Finished difference Result 42 states and 43 transitions. [2019-10-22 08:56:25,135 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-22 08:56:25,135 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 57 [2019-10-22 08:56:25,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 08:56:25,136 INFO L225 Difference]: With dead ends: 42 [2019-10-22 08:56:25,136 INFO L226 Difference]: Without dead ends: 38 [2019-10-22 08:56:25,137 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=195, Invalid=455, Unknown=0, NotChecked=0, Total=650 [2019-10-22 08:56:25,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2019-10-22 08:56:25,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2019-10-22 08:56:25,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-10-22 08:56:25,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2019-10-22 08:56:25,142 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 57 [2019-10-22 08:56:25,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 08:56:25,142 INFO L462 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2019-10-22 08:56:25,142 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-10-22 08:56:25,142 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2019-10-22 08:56:25,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2019-10-22 08:56:25,143 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 08:56:25,143 INFO L380 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 08:56:25,344 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 08:56:25,344 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 08:56:25,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:56:25,344 INFO L82 PathProgramCache]: Analyzing trace with hash -2055304301, now seen corresponding path program 9 times [2019-10-22 08:56:25,344 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:56:25,345 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618681624] [2019-10-22 08:56:25,345 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:56:25,345 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:56:25,345 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:56:25,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:25,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:25,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:25,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:25,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:25,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:25,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:25,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:25,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:25,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:25,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:25,603 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 08:56:25,603 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618681624] [2019-10-22 08:56:25,603 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1104635029] [2019-10-22 08:56:25,603 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_43ac67a8-5711-4c16-9aa6-a88a40fd9dfb/bin/uautomizer/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 08:56:25,650 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2019-10-22 08:56:25,651 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 08:56:25,652 INFO L256 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2019-10-22 08:56:25,654 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 08:56:26,073 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 08:56:26,073 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 08:56:26,073 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 23] total 37 [2019-10-22 08:56:26,074 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786257927] [2019-10-22 08:56:26,074 INFO L442 AbstractCegarLoop]: Interpolant automaton has 37 states [2019-10-22 08:56:26,074 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 08:56:26,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2019-10-22 08:56:26,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=1133, Unknown=0, NotChecked=0, Total=1332 [2019-10-22 08:56:26,075 INFO L87 Difference]: Start difference. First operand 38 states and 39 transitions. Second operand 37 states. [2019-10-22 08:56:26,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 08:56:26,475 INFO L93 Difference]: Finished difference Result 45 states and 46 transitions. [2019-10-22 08:56:26,475 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-10-22 08:56:26,475 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 63 [2019-10-22 08:56:26,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 08:56:26,476 INFO L225 Difference]: With dead ends: 45 [2019-10-22 08:56:26,476 INFO L226 Difference]: Without dead ends: 41 [2019-10-22 08:56:26,478 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 539 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=537, Invalid=2543, Unknown=0, NotChecked=0, Total=3080 [2019-10-22 08:56:26,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2019-10-22 08:56:26,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2019-10-22 08:56:26,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-10-22 08:56:26,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2019-10-22 08:56:26,482 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 63 [2019-10-22 08:56:26,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 08:56:26,483 INFO L462 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2019-10-22 08:56:26,483 INFO L463 AbstractCegarLoop]: Interpolant automaton has 37 states. [2019-10-22 08:56:26,483 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2019-10-22 08:56:26,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2019-10-22 08:56:26,484 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 08:56:26,484 INFO L380 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 08:56:26,684 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 08:56:26,684 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 08:56:26,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:56:26,685 INFO L82 PathProgramCache]: Analyzing trace with hash -1172322647, now seen corresponding path program 10 times [2019-10-22 08:56:26,685 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:56:26,685 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348331073] [2019-10-22 08:56:26,685 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:56:26,685 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:56:26,685 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:56:26,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:26,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:26,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:26,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:26,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:26,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:26,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:26,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:26,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:26,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:26,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:26,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:26,948 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 08:56:26,949 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348331073] [2019-10-22 08:56:26,949 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [321702499] [2019-10-22 08:56:26,949 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_43ac67a8-5711-4c16-9aa6-a88a40fd9dfb/bin/uautomizer/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 08:56:26,991 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-22 08:56:26,991 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 08:56:26,992 INFO L256 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2019-10-22 08:56:26,995 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 08:56:27,058 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 08:56:27,059 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 08:56:27,059 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 19 [2019-10-22 08:56:27,059 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689359134] [2019-10-22 08:56:27,059 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-10-22 08:56:27,060 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 08:56:27,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-10-22 08:56:27,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=240, Unknown=0, NotChecked=0, Total=342 [2019-10-22 08:56:27,060 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand 19 states. [2019-10-22 08:56:27,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 08:56:27,202 INFO L93 Difference]: Finished difference Result 48 states and 49 transitions. [2019-10-22 08:56:27,203 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-10-22 08:56:27,203 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 69 [2019-10-22 08:56:27,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 08:56:27,204 INFO L225 Difference]: With dead ends: 48 [2019-10-22 08:56:27,204 INFO L226 Difference]: Without dead ends: 44 [2019-10-22 08:56:27,205 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=268, Invalid=602, Unknown=0, NotChecked=0, Total=870 [2019-10-22 08:56:27,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2019-10-22 08:56:27,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2019-10-22 08:56:27,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-10-22 08:56:27,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 45 transitions. [2019-10-22 08:56:27,212 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 45 transitions. Word has length 69 [2019-10-22 08:56:27,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 08:56:27,212 INFO L462 AbstractCegarLoop]: Abstraction has 44 states and 45 transitions. [2019-10-22 08:56:27,212 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-10-22 08:56:27,212 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 45 transitions. [2019-10-22 08:56:27,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2019-10-22 08:56:27,213 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 08:56:27,213 INFO L380 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 08:56:27,413 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 08:56:27,414 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 08:56:27,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:56:27,414 INFO L82 PathProgramCache]: Analyzing trace with hash -1452916077, now seen corresponding path program 11 times [2019-10-22 08:56:27,414 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:56:27,414 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002834430] [2019-10-22 08:56:27,415 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:56:27,415 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:56:27,415 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:56:27,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:27,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:27,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:27,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:27,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:27,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:27,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:27,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:27,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:27,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:27,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:27,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:27,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:27,697 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 08:56:27,697 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002834430] [2019-10-22 08:56:27,697 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2126549046] [2019-10-22 08:56:27,697 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_43ac67a8-5711-4c16-9aa6-a88a40fd9dfb/bin/uautomizer/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 08:56:27,751 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2019-10-22 08:56:27,752 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 08:56:27,753 INFO L256 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 26 conjunts are in the unsatisfiable core [2019-10-22 08:56:27,755 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 08:56:27,807 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 08:56:27,807 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 08:56:27,807 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 20 [2019-10-22 08:56:27,807 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586560665] [2019-10-22 08:56:27,808 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-10-22 08:56:27,808 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 08:56:27,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-10-22 08:56:27,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=264, Unknown=0, NotChecked=0, Total=380 [2019-10-22 08:56:27,808 INFO L87 Difference]: Start difference. First operand 44 states and 45 transitions. Second operand 20 states. [2019-10-22 08:56:27,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 08:56:27,965 INFO L93 Difference]: Finished difference Result 51 states and 52 transitions. [2019-10-22 08:56:27,965 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-10-22 08:56:27,965 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 75 [2019-10-22 08:56:27,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 08:56:27,966 INFO L225 Difference]: With dead ends: 51 [2019-10-22 08:56:27,966 INFO L226 Difference]: Without dead ends: 47 [2019-10-22 08:56:27,967 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=309, Invalid=683, Unknown=0, NotChecked=0, Total=992 [2019-10-22 08:56:27,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2019-10-22 08:56:27,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2019-10-22 08:56:27,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2019-10-22 08:56:27,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 48 transitions. [2019-10-22 08:56:27,973 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 48 transitions. Word has length 75 [2019-10-22 08:56:27,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 08:56:27,973 INFO L462 AbstractCegarLoop]: Abstraction has 47 states and 48 transitions. [2019-10-22 08:56:27,973 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-10-22 08:56:27,973 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 48 transitions. [2019-10-22 08:56:27,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2019-10-22 08:56:27,974 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 08:56:27,974 INFO L380 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 08:56:28,178 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 08:56:28,178 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 08:56:28,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:56:28,178 INFO L82 PathProgramCache]: Analyzing trace with hash -461124311, now seen corresponding path program 12 times [2019-10-22 08:56:28,178 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:56:28,178 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270091588] [2019-10-22 08:56:28,178 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:56:28,179 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:56:28,179 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:56:28,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:28,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:28,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:28,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:28,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:28,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:28,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:28,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:28,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:28,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:28,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:28,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:28,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:28,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:28,543 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2019-10-22 08:56:28,543 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270091588] [2019-10-22 08:56:28,543 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1222175645] [2019-10-22 08:56:28,543 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_43ac67a8-5711-4c16-9aa6-a88a40fd9dfb/bin/uautomizer/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 08:56:28,595 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2019-10-22 08:56:28,595 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 08:56:28,596 INFO L256 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 28 conjunts are in the unsatisfiable core [2019-10-22 08:56:28,598 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 08:56:28,672 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2019-10-22 08:56:28,672 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 08:56:28,672 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 21 [2019-10-22 08:56:28,672 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138848401] [2019-10-22 08:56:28,673 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-10-22 08:56:28,673 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 08:56:28,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-10-22 08:56:28,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=289, Unknown=0, NotChecked=0, Total=420 [2019-10-22 08:56:28,674 INFO L87 Difference]: Start difference. First operand 47 states and 48 transitions. Second operand 21 states. [2019-10-22 08:56:28,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 08:56:28,844 INFO L93 Difference]: Finished difference Result 54 states and 55 transitions. [2019-10-22 08:56:28,844 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-10-22 08:56:28,844 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 81 [2019-10-22 08:56:28,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 08:56:28,845 INFO L225 Difference]: With dead ends: 54 [2019-10-22 08:56:28,845 INFO L226 Difference]: Without dead ends: 50 [2019-10-22 08:56:28,845 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=353, Invalid=769, Unknown=0, NotChecked=0, Total=1122 [2019-10-22 08:56:28,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2019-10-22 08:56:28,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2019-10-22 08:56:28,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2019-10-22 08:56:28,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 51 transitions. [2019-10-22 08:56:28,850 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 51 transitions. Word has length 81 [2019-10-22 08:56:28,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 08:56:28,850 INFO L462 AbstractCegarLoop]: Abstraction has 50 states and 51 transitions. [2019-10-22 08:56:28,850 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-10-22 08:56:28,850 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 51 transitions. [2019-10-22 08:56:28,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2019-10-22 08:56:28,851 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 08:56:28,851 INFO L380 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 08:56:29,052 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 08:56:29,052 INFO L410 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 08:56:29,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:56:29,052 INFO L82 PathProgramCache]: Analyzing trace with hash -1887065709, now seen corresponding path program 13 times [2019-10-22 08:56:29,053 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:56:29,053 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869972255] [2019-10-22 08:56:29,053 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:56:29,053 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:56:29,053 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:56:29,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:29,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:29,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:29,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:29,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:29,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:29,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:29,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:29,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:29,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:29,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:29,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:29,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:29,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:29,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:29,452 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2019-10-22 08:56:29,452 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869972255] [2019-10-22 08:56:29,452 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1425024181] [2019-10-22 08:56:29,452 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_43ac67a8-5711-4c16-9aa6-a88a40fd9dfb/bin/uautomizer/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 08:56:29,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:29,496 INFO L256 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 30 conjunts are in the unsatisfiable core [2019-10-22 08:56:29,498 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 08:56:29,568 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2019-10-22 08:56:29,568 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 08:56:29,568 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 22 [2019-10-22 08:56:29,568 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539089684] [2019-10-22 08:56:29,569 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-10-22 08:56:29,569 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 08:56:29,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-10-22 08:56:29,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=315, Unknown=0, NotChecked=0, Total=462 [2019-10-22 08:56:29,569 INFO L87 Difference]: Start difference. First operand 50 states and 51 transitions. Second operand 22 states. [2019-10-22 08:56:29,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 08:56:29,730 INFO L93 Difference]: Finished difference Result 57 states and 58 transitions. [2019-10-22 08:56:29,730 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-10-22 08:56:29,730 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 87 [2019-10-22 08:56:29,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 08:56:29,731 INFO L225 Difference]: With dead ends: 57 [2019-10-22 08:56:29,731 INFO L226 Difference]: Without dead ends: 53 [2019-10-22 08:56:29,732 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=400, Invalid=860, Unknown=0, NotChecked=0, Total=1260 [2019-10-22 08:56:29,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2019-10-22 08:56:29,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2019-10-22 08:56:29,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2019-10-22 08:56:29,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2019-10-22 08:56:29,741 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 87 [2019-10-22 08:56:29,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 08:56:29,742 INFO L462 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2019-10-22 08:56:29,742 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-10-22 08:56:29,742 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2019-10-22 08:56:29,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2019-10-22 08:56:29,742 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 08:56:29,743 INFO L380 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 08:56:29,944 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 08:56:29,945 INFO L410 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 08:56:29,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:56:29,945 INFO L82 PathProgramCache]: Analyzing trace with hash -1777212503, now seen corresponding path program 14 times [2019-10-22 08:56:29,945 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:56:29,945 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539274988] [2019-10-22 08:56:29,945 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:56:29,946 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:56:29,946 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:56:29,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:29,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:30,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:30,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:30,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:30,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:30,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:30,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:30,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:30,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:30,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:30,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:30,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:30,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:30,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:30,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:30,425 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2019-10-22 08:56:30,426 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539274988] [2019-10-22 08:56:30,426 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1503505404] [2019-10-22 08:56:30,426 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_43ac67a8-5711-4c16-9aa6-a88a40fd9dfb/bin/uautomizer/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 08:56:30,474 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-22 08:56:30,474 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 08:56:30,475 INFO L256 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 32 conjunts are in the unsatisfiable core [2019-10-22 08:56:30,477 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 08:56:30,547 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2019-10-22 08:56:30,547 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 08:56:30,548 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 23 [2019-10-22 08:56:30,548 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107891190] [2019-10-22 08:56:30,548 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-10-22 08:56:30,549 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 08:56:30,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-10-22 08:56:30,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=342, Unknown=0, NotChecked=0, Total=506 [2019-10-22 08:56:30,550 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand 23 states. [2019-10-22 08:56:30,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 08:56:30,748 INFO L93 Difference]: Finished difference Result 60 states and 61 transitions. [2019-10-22 08:56:30,748 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-10-22 08:56:30,748 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 93 [2019-10-22 08:56:30,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 08:56:30,748 INFO L225 Difference]: With dead ends: 60 [2019-10-22 08:56:30,749 INFO L226 Difference]: Without dead ends: 56 [2019-10-22 08:56:30,749 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=450, Invalid=956, Unknown=0, NotChecked=0, Total=1406 [2019-10-22 08:56:30,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2019-10-22 08:56:30,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2019-10-22 08:56:30,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2019-10-22 08:56:30,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 57 transitions. [2019-10-22 08:56:30,754 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 57 transitions. Word has length 93 [2019-10-22 08:56:30,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 08:56:30,757 INFO L462 AbstractCegarLoop]: Abstraction has 56 states and 57 transitions. [2019-10-22 08:56:30,757 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-10-22 08:56:30,757 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 57 transitions. [2019-10-22 08:56:30,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2019-10-22 08:56:30,758 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 08:56:30,758 INFO L380 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 08:56:30,958 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 08:56:30,958 INFO L410 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 08:56:30,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:56:30,958 INFO L82 PathProgramCache]: Analyzing trace with hash -948911981, now seen corresponding path program 15 times [2019-10-22 08:56:30,959 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:56:30,959 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465526577] [2019-10-22 08:56:30,959 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:56:30,959 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:56:30,959 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:56:30,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:30,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:31,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:31,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:31,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:31,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:31,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:31,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:31,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:31,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:31,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:31,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:31,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:31,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:31,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:31,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:31,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:31,369 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2019-10-22 08:56:31,369 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465526577] [2019-10-22 08:56:31,370 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1930031080] [2019-10-22 08:56:31,370 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_43ac67a8-5711-4c16-9aa6-a88a40fd9dfb/bin/uautomizer/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 08:56:31,432 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2019-10-22 08:56:31,432 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 08:56:31,433 INFO L256 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 34 conjunts are in the unsatisfiable core [2019-10-22 08:56:31,435 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 08:56:31,494 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2019-10-22 08:56:31,495 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 08:56:31,495 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 24 [2019-10-22 08:56:31,495 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497628317] [2019-10-22 08:56:31,496 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-10-22 08:56:31,496 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 08:56:31,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-10-22 08:56:31,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=370, Unknown=0, NotChecked=0, Total=552 [2019-10-22 08:56:31,497 INFO L87 Difference]: Start difference. First operand 56 states and 57 transitions. Second operand 24 states. [2019-10-22 08:56:31,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 08:56:31,702 INFO L93 Difference]: Finished difference Result 63 states and 64 transitions. [2019-10-22 08:56:31,702 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-10-22 08:56:31,702 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 99 [2019-10-22 08:56:31,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 08:56:31,703 INFO L225 Difference]: With dead ends: 63 [2019-10-22 08:56:31,703 INFO L226 Difference]: Without dead ends: 59 [2019-10-22 08:56:31,704 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=503, Invalid=1057, Unknown=0, NotChecked=0, Total=1560 [2019-10-22 08:56:31,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2019-10-22 08:56:31,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2019-10-22 08:56:31,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2019-10-22 08:56:31,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 60 transitions. [2019-10-22 08:56:31,710 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 60 transitions. Word has length 99 [2019-10-22 08:56:31,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 08:56:31,710 INFO L462 AbstractCegarLoop]: Abstraction has 59 states and 60 transitions. [2019-10-22 08:56:31,710 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-10-22 08:56:31,710 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 60 transitions. [2019-10-22 08:56:31,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2019-10-22 08:56:31,711 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 08:56:31,711 INFO L380 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 08:56:31,914 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 08:56:31,914 INFO L410 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 08:56:31,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:56:31,914 INFO L82 PathProgramCache]: Analyzing trace with hash 1159072297, now seen corresponding path program 16 times [2019-10-22 08:56:31,914 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:56:31,914 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505009593] [2019-10-22 08:56:31,914 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:56:31,914 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:56:31,914 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:56:31,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:31,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:31,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:32,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:32,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:32,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:32,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:32,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:32,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:32,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:32,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:32,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:32,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:32,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:32,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:32,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:32,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:32,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:32,435 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2019-10-22 08:56:32,436 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505009593] [2019-10-22 08:56:32,436 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [566390921] [2019-10-22 08:56:32,436 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_43ac67a8-5711-4c16-9aa6-a88a40fd9dfb/bin/uautomizer/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 08:56:32,487 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-22 08:56:32,487 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 08:56:32,489 INFO L256 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 36 conjunts are in the unsatisfiable core [2019-10-22 08:56:32,491 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 08:56:32,551 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2019-10-22 08:56:32,552 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 08:56:32,552 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21] total 25 [2019-10-22 08:56:32,552 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768694013] [2019-10-22 08:56:32,552 INFO L442 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-10-22 08:56:32,553 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 08:56:32,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-10-22 08:56:32,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=399, Unknown=0, NotChecked=0, Total=600 [2019-10-22 08:56:32,554 INFO L87 Difference]: Start difference. First operand 59 states and 60 transitions. Second operand 25 states. [2019-10-22 08:56:32,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 08:56:32,751 INFO L93 Difference]: Finished difference Result 66 states and 67 transitions. [2019-10-22 08:56:32,751 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-10-22 08:56:32,751 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 105 [2019-10-22 08:56:32,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 08:56:32,752 INFO L225 Difference]: With dead ends: 66 [2019-10-22 08:56:32,752 INFO L226 Difference]: Without dead ends: 62 [2019-10-22 08:56:32,753 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 288 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=559, Invalid=1163, Unknown=0, NotChecked=0, Total=1722 [2019-10-22 08:56:32,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2019-10-22 08:56:32,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2019-10-22 08:56:32,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2019-10-22 08:56:32,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 63 transitions. [2019-10-22 08:56:32,762 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 63 transitions. Word has length 105 [2019-10-22 08:56:32,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 08:56:32,762 INFO L462 AbstractCegarLoop]: Abstraction has 62 states and 63 transitions. [2019-10-22 08:56:32,762 INFO L463 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-10-22 08:56:32,762 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 63 transitions. [2019-10-22 08:56:32,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2019-10-22 08:56:32,764 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 08:56:32,765 INFO L380 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 08:56:32,965 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 08:56:32,965 INFO L410 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 08:56:32,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:56:32,966 INFO L82 PathProgramCache]: Analyzing trace with hash 2109441939, now seen corresponding path program 17 times [2019-10-22 08:56:32,966 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:56:32,966 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614714764] [2019-10-22 08:56:32,966 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:56:32,966 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:56:32,966 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:56:32,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:33,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:33,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:33,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:33,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:33,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:33,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:33,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:33,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:33,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:33,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:33,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:33,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:33,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:33,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:33,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:33,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:33,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:33,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:33,474 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2019-10-22 08:56:33,474 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614714764] [2019-10-22 08:56:33,475 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1814587048] [2019-10-22 08:56:33,475 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_43ac67a8-5711-4c16-9aa6-a88a40fd9dfb/bin/uautomizer/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 08:56:33,533 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2019-10-22 08:56:33,534 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 08:56:33,535 INFO L256 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 38 conjunts are in the unsatisfiable core [2019-10-22 08:56:33,536 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 08:56:33,603 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2019-10-22 08:56:33,604 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 08:56:33,604 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 22] total 26 [2019-10-22 08:56:33,604 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026720177] [2019-10-22 08:56:33,605 INFO L442 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-10-22 08:56:33,605 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 08:56:33,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-10-22 08:56:33,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=221, Invalid=429, Unknown=0, NotChecked=0, Total=650 [2019-10-22 08:56:33,605 INFO L87 Difference]: Start difference. First operand 62 states and 63 transitions. Second operand 26 states. [2019-10-22 08:56:33,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 08:56:33,842 INFO L93 Difference]: Finished difference Result 69 states and 70 transitions. [2019-10-22 08:56:33,842 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-10-22 08:56:33,842 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 111 [2019-10-22 08:56:33,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 08:56:33,843 INFO L225 Difference]: With dead ends: 69 [2019-10-22 08:56:33,843 INFO L226 Difference]: Without dead ends: 65 [2019-10-22 08:56:33,844 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 323 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=618, Invalid=1274, Unknown=0, NotChecked=0, Total=1892 [2019-10-22 08:56:33,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2019-10-22 08:56:33,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2019-10-22 08:56:33,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2019-10-22 08:56:33,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 66 transitions. [2019-10-22 08:56:33,852 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 66 transitions. Word has length 111 [2019-10-22 08:56:33,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 08:56:33,852 INFO L462 AbstractCegarLoop]: Abstraction has 65 states and 66 transitions. [2019-10-22 08:56:33,852 INFO L463 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-10-22 08:56:33,852 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 66 transitions. [2019-10-22 08:56:33,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2019-10-22 08:56:33,853 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 08:56:33,853 INFO L380 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 08:56:34,053 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 08:56:34,054 INFO L410 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 08:56:34,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:56:34,054 INFO L82 PathProgramCache]: Analyzing trace with hash 450642089, now seen corresponding path program 18 times [2019-10-22 08:56:34,054 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:56:34,054 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808824799] [2019-10-22 08:56:34,054 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:56:34,054 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:56:34,054 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:56:34,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:34,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:34,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:34,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:34,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:34,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:34,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:34,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:34,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:34,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:34,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:34,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:34,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:34,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:34,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:34,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:34,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:34,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:34,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:34,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:34,659 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2019-10-22 08:56:34,659 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808824799] [2019-10-22 08:56:34,659 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1074046893] [2019-10-22 08:56:34,659 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_43ac67a8-5711-4c16-9aa6-a88a40fd9dfb/bin/uautomizer/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 08:56:34,737 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2019-10-22 08:56:34,737 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 08:56:34,739 INFO L256 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 40 conjunts are in the unsatisfiable core [2019-10-22 08:56:34,741 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 08:56:34,811 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2019-10-22 08:56:34,811 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 08:56:34,811 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 23] total 27 [2019-10-22 08:56:34,811 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062902007] [2019-10-22 08:56:34,812 INFO L442 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-10-22 08:56:34,813 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 08:56:34,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-10-22 08:56:34,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=242, Invalid=460, Unknown=0, NotChecked=0, Total=702 [2019-10-22 08:56:34,813 INFO L87 Difference]: Start difference. First operand 65 states and 66 transitions. Second operand 27 states. [2019-10-22 08:56:35,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 08:56:35,036 INFO L93 Difference]: Finished difference Result 72 states and 73 transitions. [2019-10-22 08:56:35,036 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-10-22 08:56:35,037 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 117 [2019-10-22 08:56:35,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 08:56:35,037 INFO L225 Difference]: With dead ends: 72 [2019-10-22 08:56:35,037 INFO L226 Difference]: Without dead ends: 68 [2019-10-22 08:56:35,038 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 360 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=680, Invalid=1390, Unknown=0, NotChecked=0, Total=2070 [2019-10-22 08:56:35,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2019-10-22 08:56:35,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2019-10-22 08:56:35,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2019-10-22 08:56:35,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 69 transitions. [2019-10-22 08:56:35,042 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 69 transitions. Word has length 117 [2019-10-22 08:56:35,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 08:56:35,042 INFO L462 AbstractCegarLoop]: Abstraction has 68 states and 69 transitions. [2019-10-22 08:56:35,042 INFO L463 AbstractCegarLoop]: Interpolant automaton has 27 states. [2019-10-22 08:56:35,042 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 69 transitions. [2019-10-22 08:56:35,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2019-10-22 08:56:35,043 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 08:56:35,044 INFO L380 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 08:56:35,244 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 08:56:35,244 INFO L410 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 08:56:35,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:56:35,245 INFO L82 PathProgramCache]: Analyzing trace with hash -1141244269, now seen corresponding path program 19 times [2019-10-22 08:56:35,245 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:56:35,245 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800883736] [2019-10-22 08:56:35,245 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:56:35,245 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:56:35,245 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:56:35,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:35,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:35,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:35,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:35,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:35,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:35,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:35,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:35,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:35,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:35,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:35,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:35,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:35,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:35,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:35,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:35,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:35,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:35,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:35,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:35,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:35,902 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2019-10-22 08:56:35,903 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800883736] [2019-10-22 08:56:35,903 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [744268407] [2019-10-22 08:56:35,903 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_43ac67a8-5711-4c16-9aa6-a88a40fd9dfb/bin/uautomizer/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 08:56:35,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:35,959 INFO L256 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 42 conjunts are in the unsatisfiable core [2019-10-22 08:56:35,961 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 08:56:36,027 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2019-10-22 08:56:36,027 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 08:56:36,027 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 24] total 28 [2019-10-22 08:56:36,027 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008572453] [2019-10-22 08:56:36,028 INFO L442 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-10-22 08:56:36,028 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 08:56:36,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-10-22 08:56:36,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=264, Invalid=492, Unknown=0, NotChecked=0, Total=756 [2019-10-22 08:56:36,029 INFO L87 Difference]: Start difference. First operand 68 states and 69 transitions. Second operand 28 states. [2019-10-22 08:56:36,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 08:56:36,248 INFO L93 Difference]: Finished difference Result 75 states and 76 transitions. [2019-10-22 08:56:36,249 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-10-22 08:56:36,249 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 123 [2019-10-22 08:56:36,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 08:56:36,249 INFO L225 Difference]: With dead ends: 75 [2019-10-22 08:56:36,249 INFO L226 Difference]: Without dead ends: 71 [2019-10-22 08:56:36,250 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 399 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=745, Invalid=1511, Unknown=0, NotChecked=0, Total=2256 [2019-10-22 08:56:36,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2019-10-22 08:56:36,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2019-10-22 08:56:36,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2019-10-22 08:56:36,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 72 transitions. [2019-10-22 08:56:36,253 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 72 transitions. Word has length 123 [2019-10-22 08:56:36,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 08:56:36,254 INFO L462 AbstractCegarLoop]: Abstraction has 71 states and 72 transitions. [2019-10-22 08:56:36,254 INFO L463 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-10-22 08:56:36,254 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 72 transitions. [2019-10-22 08:56:36,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2019-10-22 08:56:36,255 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 08:56:36,255 INFO L380 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 08:56:36,456 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 08:56:36,456 INFO L410 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 08:56:36,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:56:36,456 INFO L82 PathProgramCache]: Analyzing trace with hash -1280276695, now seen corresponding path program 20 times [2019-10-22 08:56:36,456 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:56:36,456 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014660233] [2019-10-22 08:56:36,456 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:56:36,456 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:56:36,456 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:56:36,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:36,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:36,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:36,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:36,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:36,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:36,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:36,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:36,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:36,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:36,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:36,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:36,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:36,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:36,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:36,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:36,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:36,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:36,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:36,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:36,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:36,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:37,095 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 0 proven. 610 refuted. 0 times theorem prover too weak. 610 trivial. 0 not checked. [2019-10-22 08:56:37,095 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014660233] [2019-10-22 08:56:37,095 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [330909401] [2019-10-22 08:56:37,095 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_43ac67a8-5711-4c16-9aa6-a88a40fd9dfb/bin/uautomizer/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 08:56:37,157 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-22 08:56:37,157 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 08:56:37,158 INFO L256 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 44 conjunts are in the unsatisfiable core [2019-10-22 08:56:37,160 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 08:56:37,227 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 0 proven. 610 refuted. 0 times theorem prover too weak. 610 trivial. 0 not checked. [2019-10-22 08:56:37,228 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 08:56:37,228 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 25] total 29 [2019-10-22 08:56:37,228 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707137856] [2019-10-22 08:56:37,228 INFO L442 AbstractCegarLoop]: Interpolant automaton has 29 states [2019-10-22 08:56:37,228 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 08:56:37,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2019-10-22 08:56:37,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=287, Invalid=525, Unknown=0, NotChecked=0, Total=812 [2019-10-22 08:56:37,229 INFO L87 Difference]: Start difference. First operand 71 states and 72 transitions. Second operand 29 states. [2019-10-22 08:56:37,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 08:56:37,516 INFO L93 Difference]: Finished difference Result 78 states and 79 transitions. [2019-10-22 08:56:37,516 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-10-22 08:56:37,517 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 129 [2019-10-22 08:56:37,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 08:56:37,517 INFO L225 Difference]: With dead ends: 78 [2019-10-22 08:56:37,517 INFO L226 Difference]: Without dead ends: 74 [2019-10-22 08:56:37,518 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 440 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=813, Invalid=1637, Unknown=0, NotChecked=0, Total=2450 [2019-10-22 08:56:37,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2019-10-22 08:56:37,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2019-10-22 08:56:37,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2019-10-22 08:56:37,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 75 transitions. [2019-10-22 08:56:37,521 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 75 transitions. Word has length 129 [2019-10-22 08:56:37,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 08:56:37,522 INFO L462 AbstractCegarLoop]: Abstraction has 74 states and 75 transitions. [2019-10-22 08:56:37,522 INFO L463 AbstractCegarLoop]: Interpolant automaton has 29 states. [2019-10-22 08:56:37,522 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 75 transitions. [2019-10-22 08:56:37,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2019-10-22 08:56:37,529 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 08:56:37,529 INFO L380 BasicCegarLoop]: trace histogram [22, 22, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 08:56:37,729 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 08:56:37,730 INFO L410 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 08:56:37,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:56:37,730 INFO L82 PathProgramCache]: Analyzing trace with hash -1463802477, now seen corresponding path program 21 times [2019-10-22 08:56:37,730 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:56:37,730 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658540890] [2019-10-22 08:56:37,730 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:56:37,730 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:56:37,730 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:56:37,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:37,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:37,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:37,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:37,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:37,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:37,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:37,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:38,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:38,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:38,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:38,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:38,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:38,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:38,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:38,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:38,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:38,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:38,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:38,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:38,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:38,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:38,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:38,431 INFO L134 CoverageAnalysis]: Checked inductivity of 1344 backedges. 0 proven. 672 refuted. 0 times theorem prover too weak. 672 trivial. 0 not checked. [2019-10-22 08:56:38,432 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658540890] [2019-10-22 08:56:38,432 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [330326504] [2019-10-22 08:56:38,432 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_43ac67a8-5711-4c16-9aa6-a88a40fd9dfb/bin/uautomizer/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 08:56:38,512 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2019-10-22 08:56:38,512 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 08:56:38,514 INFO L256 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 46 conjunts are in the unsatisfiable core [2019-10-22 08:56:38,516 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 08:56:38,584 INFO L134 CoverageAnalysis]: Checked inductivity of 1344 backedges. 0 proven. 672 refuted. 0 times theorem prover too weak. 672 trivial. 0 not checked. [2019-10-22 08:56:38,584 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 08:56:38,585 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 26] total 30 [2019-10-22 08:56:38,585 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107450163] [2019-10-22 08:56:38,585 INFO L442 AbstractCegarLoop]: Interpolant automaton has 30 states [2019-10-22 08:56:38,585 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 08:56:38,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2019-10-22 08:56:38,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=311, Invalid=559, Unknown=0, NotChecked=0, Total=870 [2019-10-22 08:56:38,586 INFO L87 Difference]: Start difference. First operand 74 states and 75 transitions. Second operand 30 states. [2019-10-22 08:56:38,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 08:56:38,857 INFO L93 Difference]: Finished difference Result 81 states and 82 transitions. [2019-10-22 08:56:38,858 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-10-22 08:56:38,859 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 135 [2019-10-22 08:56:38,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 08:56:38,859 INFO L225 Difference]: With dead ends: 81 [2019-10-22 08:56:38,860 INFO L226 Difference]: Without dead ends: 77 [2019-10-22 08:56:38,860 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 483 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=884, Invalid=1768, Unknown=0, NotChecked=0, Total=2652 [2019-10-22 08:56:38,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2019-10-22 08:56:38,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2019-10-22 08:56:38,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2019-10-22 08:56:38,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 78 transitions. [2019-10-22 08:56:38,869 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 78 transitions. Word has length 135 [2019-10-22 08:56:38,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 08:56:38,869 INFO L462 AbstractCegarLoop]: Abstraction has 77 states and 78 transitions. [2019-10-22 08:56:38,869 INFO L463 AbstractCegarLoop]: Interpolant automaton has 30 states. [2019-10-22 08:56:38,869 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 78 transitions. [2019-10-22 08:56:38,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2019-10-22 08:56:38,870 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 08:56:38,870 INFO L380 BasicCegarLoop]: trace histogram [23, 23, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 08:56:39,073 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 08:56:39,073 INFO L410 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 08:56:39,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:56:39,073 INFO L82 PathProgramCache]: Analyzing trace with hash -555819607, now seen corresponding path program 22 times [2019-10-22 08:56:39,073 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:56:39,073 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854916554] [2019-10-22 08:56:39,073 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:56:39,073 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:56:39,073 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:56:39,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:39,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:39,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:39,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:39,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:39,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:39,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:39,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:39,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:39,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:39,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:39,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:39,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:39,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:39,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:39,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:39,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:39,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:39,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:39,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:39,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:39,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:39,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:39,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:39,934 INFO L134 CoverageAnalysis]: Checked inductivity of 1474 backedges. 0 proven. 737 refuted. 0 times theorem prover too weak. 737 trivial. 0 not checked. [2019-10-22 08:56:39,935 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854916554] [2019-10-22 08:56:39,935 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [59681680] [2019-10-22 08:56:39,935 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_43ac67a8-5711-4c16-9aa6-a88a40fd9dfb/bin/uautomizer/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 08:56:40,007 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-22 08:56:40,008 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 08:56:40,010 INFO L256 TraceCheckSpWp]: Trace formula consists of 332 conjuncts, 48 conjunts are in the unsatisfiable core [2019-10-22 08:56:40,012 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 08:56:40,099 INFO L134 CoverageAnalysis]: Checked inductivity of 1474 backedges. 0 proven. 737 refuted. 0 times theorem prover too weak. 737 trivial. 0 not checked. [2019-10-22 08:56:40,099 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 08:56:40,099 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 27] total 31 [2019-10-22 08:56:40,099 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063838728] [2019-10-22 08:56:40,100 INFO L442 AbstractCegarLoop]: Interpolant automaton has 31 states [2019-10-22 08:56:40,102 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 08:56:40,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2019-10-22 08:56:40,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=336, Invalid=594, Unknown=0, NotChecked=0, Total=930 [2019-10-22 08:56:40,102 INFO L87 Difference]: Start difference. First operand 77 states and 78 transitions. Second operand 31 states. [2019-10-22 08:56:40,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 08:56:40,367 INFO L93 Difference]: Finished difference Result 84 states and 85 transitions. [2019-10-22 08:56:40,367 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-10-22 08:56:40,368 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 141 [2019-10-22 08:56:40,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 08:56:40,368 INFO L225 Difference]: With dead ends: 84 [2019-10-22 08:56:40,369 INFO L226 Difference]: Without dead ends: 80 [2019-10-22 08:56:40,369 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 528 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=958, Invalid=1904, Unknown=0, NotChecked=0, Total=2862 [2019-10-22 08:56:40,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2019-10-22 08:56:40,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2019-10-22 08:56:40,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2019-10-22 08:56:40,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 81 transitions. [2019-10-22 08:56:40,373 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 81 transitions. Word has length 141 [2019-10-22 08:56:40,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 08:56:40,373 INFO L462 AbstractCegarLoop]: Abstraction has 80 states and 81 transitions. [2019-10-22 08:56:40,374 INFO L463 AbstractCegarLoop]: Interpolant automaton has 31 states. [2019-10-22 08:56:40,374 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 81 transitions. [2019-10-22 08:56:40,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2019-10-22 08:56:40,374 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 08:56:40,375 INFO L380 BasicCegarLoop]: trace histogram [24, 24, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 08:56:40,575 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 08:56:40,575 INFO L410 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 08:56:40,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:56:40,576 INFO L82 PathProgramCache]: Analyzing trace with hash -945685357, now seen corresponding path program 23 times [2019-10-22 08:56:40,576 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:56:40,576 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184937152] [2019-10-22 08:56:40,576 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:56:40,576 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:56:40,576 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:56:40,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:40,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:40,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:40,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:40,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:40,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:40,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:40,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:40,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:40,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:40,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:40,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:40,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:40,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:41,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:41,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:41,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:41,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:41,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:41,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:41,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:41,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:41,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:41,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:41,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:41,380 INFO L134 CoverageAnalysis]: Checked inductivity of 1610 backedges. 0 proven. 805 refuted. 0 times theorem prover too weak. 805 trivial. 0 not checked. [2019-10-22 08:56:41,381 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184937152] [2019-10-22 08:56:41,381 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [704454199] [2019-10-22 08:56:41,381 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_43ac67a8-5711-4c16-9aa6-a88a40fd9dfb/bin/uautomizer/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 08:56:41,452 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2019-10-22 08:56:41,452 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 08:56:41,454 INFO L256 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 50 conjunts are in the unsatisfiable core [2019-10-22 08:56:41,456 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 08:56:41,532 INFO L134 CoverageAnalysis]: Checked inductivity of 1610 backedges. 0 proven. 805 refuted. 0 times theorem prover too weak. 805 trivial. 0 not checked. [2019-10-22 08:56:41,532 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 08:56:41,532 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 28] total 32 [2019-10-22 08:56:41,533 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982868040] [2019-10-22 08:56:41,533 INFO L442 AbstractCegarLoop]: Interpolant automaton has 32 states [2019-10-22 08:56:41,533 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 08:56:41,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2019-10-22 08:56:41,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=362, Invalid=630, Unknown=0, NotChecked=0, Total=992 [2019-10-22 08:56:41,534 INFO L87 Difference]: Start difference. First operand 80 states and 81 transitions. Second operand 32 states. [2019-10-22 08:56:41,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 08:56:41,851 INFO L93 Difference]: Finished difference Result 87 states and 88 transitions. [2019-10-22 08:56:41,852 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-10-22 08:56:41,852 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 147 [2019-10-22 08:56:41,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 08:56:41,853 INFO L225 Difference]: With dead ends: 87 [2019-10-22 08:56:41,853 INFO L226 Difference]: Without dead ends: 83 [2019-10-22 08:56:41,854 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 575 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1035, Invalid=2045, Unknown=0, NotChecked=0, Total=3080 [2019-10-22 08:56:41,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2019-10-22 08:56:41,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2019-10-22 08:56:41,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2019-10-22 08:56:41,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 84 transitions. [2019-10-22 08:56:41,858 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 84 transitions. Word has length 147 [2019-10-22 08:56:41,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 08:56:41,858 INFO L462 AbstractCegarLoop]: Abstraction has 83 states and 84 transitions. [2019-10-22 08:56:41,858 INFO L463 AbstractCegarLoop]: Interpolant automaton has 32 states. [2019-10-22 08:56:41,858 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 84 transitions. [2019-10-22 08:56:41,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2019-10-22 08:56:41,864 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 08:56:41,864 INFO L380 BasicCegarLoop]: trace histogram [25, 25, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 08:56:42,065 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 08:56:42,065 INFO L410 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 08:56:42,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:56:42,065 INFO L82 PathProgramCache]: Analyzing trace with hash 1588806697, now seen corresponding path program 24 times [2019-10-22 08:56:42,065 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:56:42,065 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847131223] [2019-10-22 08:56:42,065 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:56:42,066 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:56:42,066 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:56:42,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:42,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:42,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:42,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:42,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:42,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:42,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:42,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:42,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:42,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:42,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:42,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:42,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:42,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:42,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:42,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:42,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:42,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:42,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:42,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:42,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:42,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:42,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:42,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:42,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:42,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:43,062 INFO L134 CoverageAnalysis]: Checked inductivity of 1752 backedges. 0 proven. 876 refuted. 0 times theorem prover too weak. 876 trivial. 0 not checked. [2019-10-22 08:56:43,062 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847131223] [2019-10-22 08:56:43,063 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1379535700] [2019-10-22 08:56:43,063 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_43ac67a8-5711-4c16-9aa6-a88a40fd9dfb/bin/uautomizer/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 08:56:43,155 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2019-10-22 08:56:43,156 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 08:56:43,157 INFO L256 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 52 conjunts are in the unsatisfiable core [2019-10-22 08:56:43,160 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 08:56:43,236 INFO L134 CoverageAnalysis]: Checked inductivity of 1752 backedges. 0 proven. 876 refuted. 0 times theorem prover too weak. 876 trivial. 0 not checked. [2019-10-22 08:56:43,236 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 08:56:43,237 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 29] total 33 [2019-10-22 08:56:43,237 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451534729] [2019-10-22 08:56:43,237 INFO L442 AbstractCegarLoop]: Interpolant automaton has 33 states [2019-10-22 08:56:43,237 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 08:56:43,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2019-10-22 08:56:43,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=389, Invalid=667, Unknown=0, NotChecked=0, Total=1056 [2019-10-22 08:56:43,238 INFO L87 Difference]: Start difference. First operand 83 states and 84 transitions. Second operand 33 states. [2019-10-22 08:56:43,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 08:56:43,567 INFO L93 Difference]: Finished difference Result 90 states and 91 transitions. [2019-10-22 08:56:43,567 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-10-22 08:56:43,567 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 153 [2019-10-22 08:56:43,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 08:56:43,568 INFO L225 Difference]: With dead ends: 90 [2019-10-22 08:56:43,568 INFO L226 Difference]: Without dead ends: 86 [2019-10-22 08:56:43,569 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 624 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1115, Invalid=2191, Unknown=0, NotChecked=0, Total=3306 [2019-10-22 08:56:43,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2019-10-22 08:56:43,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2019-10-22 08:56:43,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2019-10-22 08:56:43,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 87 transitions. [2019-10-22 08:56:43,575 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 87 transitions. Word has length 153 [2019-10-22 08:56:43,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 08:56:43,575 INFO L462 AbstractCegarLoop]: Abstraction has 86 states and 87 transitions. [2019-10-22 08:56:43,575 INFO L463 AbstractCegarLoop]: Interpolant automaton has 33 states. [2019-10-22 08:56:43,575 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 87 transitions. [2019-10-22 08:56:43,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2019-10-22 08:56:43,579 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 08:56:43,579 INFO L380 BasicCegarLoop]: trace histogram [26, 26, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 08:56:43,779 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 08:56:43,779 INFO L410 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 08:56:43,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:56:43,780 INFO L82 PathProgramCache]: Analyzing trace with hash 959677331, now seen corresponding path program 25 times [2019-10-22 08:56:43,780 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:56:43,780 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865260564] [2019-10-22 08:56:43,780 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:56:43,780 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:56:43,780 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:56:43,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 08:56:43,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 08:56:43,824 INFO L168 tionRefinementEngine]: Strategy CAMEL found a feasible trace [2019-10-22 08:56:43,824 INFO L445 BasicCegarLoop]: Counterexample might be feasible [2019-10-22 08:56:43,865 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.10 08:56:43 BoogieIcfgContainer [2019-10-22 08:56:43,865 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-10-22 08:56:43,866 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-10-22 08:56:43,866 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-10-22 08:56:43,866 INFO L275 PluginConnector]: Witness Printer initialized [2019-10-22 08:56:43,866 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 08:56:19" (3/4) ... [2019-10-22 08:56:43,868 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-10-22 08:56:43,917 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_43ac67a8-5711-4c16-9aa6-a88a40fd9dfb/bin/uautomizer/witness.graphml [2019-10-22 08:56:43,917 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-10-22 08:56:43,919 INFO L168 Benchmark]: Toolchain (without parser) took 24789.01 ms. Allocated memory was 1.0 GB in the beginning and 1.7 GB in the end (delta: 622.3 MB). Free memory was 948.5 MB in the beginning and 1.3 GB in the end (delta: -342.9 MB). Peak memory consumption was 279.4 MB. Max. memory is 11.5 GB. [2019-10-22 08:56:43,919 INFO L168 Benchmark]: CDTParser took 0.16 ms. Allocated memory is still 1.0 GB. Free memory is still 967.3 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-10-22 08:56:43,920 INFO L168 Benchmark]: CACSL2BoogieTranslator took 343.22 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 147.8 MB). Free memory was 948.5 MB in the beginning and 1.1 GB in the end (delta: -189.7 MB). Peak memory consumption was 22.7 MB. Max. memory is 11.5 GB. [2019-10-22 08:56:43,920 INFO L168 Benchmark]: Boogie Procedure Inliner took 33.21 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-10-22 08:56:43,920 INFO L168 Benchmark]: Boogie Preprocessor took 17.77 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-10-22 08:56:43,920 INFO L168 Benchmark]: RCFGBuilder took 206.79 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: 17.3 MB). Peak memory consumption was 17.3 MB. Max. memory is 11.5 GB. [2019-10-22 08:56:43,921 INFO L168 Benchmark]: TraceAbstraction took 24131.94 ms. Allocated memory was 1.2 GB in the beginning and 1.7 GB in the end (delta: 474.5 MB). Free memory was 1.1 GB in the beginning and 1.3 GB in the end (delta: -176.0 MB). Peak memory consumption was 298.5 MB. Max. memory is 11.5 GB. [2019-10-22 08:56:43,921 INFO L168 Benchmark]: Witness Printer took 51.33 ms. Allocated memory is still 1.7 GB. Free memory was 1.3 GB in the beginning and 1.3 GB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. [2019-10-22 08:56:43,923 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16 ms. Allocated memory is still 1.0 GB. Free memory is still 967.3 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 343.22 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 147.8 MB). Free memory was 948.5 MB in the beginning and 1.1 GB in the end (delta: -189.7 MB). Peak memory consumption was 22.7 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 33.21 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 17.77 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 206.79 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: 17.3 MB). Peak memory consumption was 17.3 MB. Max. memory is 11.5 GB. * TraceAbstraction took 24131.94 ms. Allocated memory was 1.2 GB in the beginning and 1.7 GB in the end (delta: 474.5 MB). Free memory was 1.1 GB in the beginning and 1.3 GB in the end (delta: -176.0 MB). Peak memory consumption was 298.5 MB. Max. memory is 11.5 GB. * Witness Printer took 51.33 ms. Allocated memory is still 1.7 GB. Free memory was 1.3 GB in the beginning and 1.3 GB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 13]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L10] int input = 25; [L11] CALL, EXPR id(input) VAL [\old(x)=25] [L5] COND FALSE !(x==0) VAL [\old(x)=25, x=25] [L6] CALL, EXPR id(x-1) VAL [\old(x)=24] [L5] COND FALSE !(x==0) VAL [\old(x)=24, x=24] [L6] CALL, EXPR id(x-1) VAL [\old(x)=23] [L5] COND FALSE !(x==0) VAL [\old(x)=23, x=23] [L6] CALL, EXPR id(x-1) VAL [\old(x)=22] [L5] COND FALSE !(x==0) VAL [\old(x)=22, x=22] [L6] CALL, EXPR id(x-1) VAL [\old(x)=21] [L5] COND FALSE !(x==0) VAL [\old(x)=21, x=21] [L6] CALL, EXPR id(x-1) VAL [\old(x)=20] [L5] COND FALSE !(x==0) VAL [\old(x)=20, x=20] [L6] CALL, EXPR id(x-1) VAL [\old(x)=19] [L5] COND FALSE !(x==0) VAL [\old(x)=19, x=19] [L6] CALL, EXPR id(x-1) VAL [\old(x)=18] [L5] COND FALSE !(x==0) VAL [\old(x)=18, x=18] [L6] CALL, EXPR id(x-1) VAL [\old(x)=17] [L5] COND FALSE !(x==0) VAL [\old(x)=17, x=17] [L6] CALL, EXPR id(x-1) VAL [\old(x)=16] [L5] COND FALSE !(x==0) VAL [\old(x)=16, x=16] [L6] CALL, EXPR id(x-1) VAL [\old(x)=15] [L5] COND FALSE !(x==0) VAL [\old(x)=15, x=15] [L6] CALL, EXPR id(x-1) VAL [\old(x)=14] [L5] COND FALSE !(x==0) VAL [\old(x)=14, x=14] [L6] CALL, EXPR id(x-1) VAL [\old(x)=13] [L5] COND FALSE !(x==0) VAL [\old(x)=13, x=13] [L6] CALL, EXPR id(x-1) VAL [\old(x)=12] [L5] COND FALSE !(x==0) VAL [\old(x)=12, x=12] [L6] CALL, EXPR id(x-1) VAL [\old(x)=11] [L5] COND FALSE !(x==0) VAL [\old(x)=11, x=11] [L6] CALL, EXPR id(x-1) VAL [\old(x)=10] [L5] COND FALSE !(x==0) VAL [\old(x)=10, x=10] [L6] CALL, EXPR id(x-1) VAL [\old(x)=9] [L5] COND FALSE !(x==0) VAL [\old(x)=9, x=9] [L6] CALL, EXPR id(x-1) VAL [\old(x)=8] [L5] COND FALSE !(x==0) VAL [\old(x)=8, x=8] [L6] CALL, EXPR id(x-1) VAL [\old(x)=7] [L5] COND FALSE !(x==0) VAL [\old(x)=7, x=7] [L6] CALL, EXPR id(x-1) VAL [\old(x)=6] [L5] COND FALSE !(x==0) VAL [\old(x)=6, x=6] [L6] CALL, EXPR id(x-1) VAL [\old(x)=5] [L5] COND FALSE !(x==0) VAL [\old(x)=5, x=5] [L6] CALL, EXPR id(x-1) VAL [\old(x)=4] [L5] COND FALSE !(x==0) VAL [\old(x)=4, x=4] [L6] CALL, EXPR id(x-1) VAL [\old(x)=3] [L5] COND FALSE !(x==0) VAL [\old(x)=3, x=3] [L6] CALL, EXPR id(x-1) VAL [\old(x)=2] [L5] COND FALSE !(x==0) VAL [\old(x)=2, x=2] [L6] CALL, EXPR id(x-1) VAL [\old(x)=1] [L5] COND FALSE !(x==0) VAL [\old(x)=1, x=1] [L6] CALL, EXPR id(x-1) VAL [\old(x)=0] [L5] COND TRUE x==0 [L5] return 0; VAL [\old(x)=0, \result=0, x=0] [L6] RET, EXPR id(x-1) VAL [\old(x)=1, id(x-1)=0, x=1] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=2, id(x-1)=1, x=2] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=3, id(x-1)=2, x=3] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=4, id(x-1)=3, x=4] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=5, id(x-1)=4, x=5] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=6, id(x-1)=5, x=6] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=7, id(x-1)=6, x=7] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=8, id(x-1)=7, x=8] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=9, id(x-1)=8, x=9] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=10, id(x-1)=9, x=10] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=11, id(x-1)=10, x=11] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=12, id(x-1)=11, x=12] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=13, id(x-1)=12, x=13] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=14, id(x-1)=13, x=14] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=15, id(x-1)=14, x=15] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=16, id(x-1)=15, x=16] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=17, id(x-1)=16, x=17] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=18, id(x-1)=17, x=18] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=19, id(x-1)=18, x=19] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=20, id(x-1)=19, x=20] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=21, id(x-1)=20, x=21] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=22, id(x-1)=21, x=22] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=23, id(x-1)=22, x=23] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=24, id(x-1)=23, x=24] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=25, id(x-1)=24, x=25] [L6] return id(x-1) + 1; [L11] RET, EXPR id(input) [L11] int result = id(input); [L12] COND TRUE result == 25 [L13] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 15 locations, 1 error locations. Result: UNSAFE, OverallTime: 24.0s, OverallIterations: 26, TraceHistogramMax: 26, AutomataDifference: 5.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 226 SDtfs, 1114 SDslu, 1652 SDs, 0 SdLazy, 1575 SolverSat, 267 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 3407 GetRequests, 2562 SyntacticMatches, 0 SemanticMatches, 845 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6143 ImplicationChecksByTransitivity, 9.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=86occurred in iteration=25, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 25 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.7s SatisfiabilityAnalysisTime, 11.9s InterpolantComputationTime, 4200 NumberOfCodeBlocks, 4200 NumberOfCodeBlocksAsserted, 222 NumberOfCheckSat, 3992 ConstructedInterpolants, 0 QuantifiedInterpolants, 1088472 SizeOfPredicates, 331 NumberOfNonLiveVariables, 4776 ConjunctsInSsa, 696 ConjunctsInUnsatCore, 49 InterpolantComputations, 1 PerfectInterpolantSequences, 15000/30000 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...