./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive-simple/fibo_2calls_4-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f470102c Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_2a93a7f8-7dc7-4fb2-875a-85110e797eb5/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_2a93a7f8-7dc7-4fb2-875a-85110e797eb5/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_2a93a7f8-7dc7-4fb2-875a-85110e797eb5/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_2a93a7f8-7dc7-4fb2-875a-85110e797eb5/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive-simple/fibo_2calls_4-1.c -s /tmp/vcloud-vcloud-master/worker/run_dir_2a93a7f8-7dc7-4fb2-875a-85110e797eb5/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_2a93a7f8-7dc7-4fb2-875a-85110e797eb5/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 ffdaeeffc8c5fdb555812137dbba1199bd1a626d ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.25-f470102 [2019-12-07 12:19:34,650 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-12-07 12:19:34,651 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-12-07 12:19:34,660 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-12-07 12:19:34,660 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-12-07 12:19:34,661 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-12-07 12:19:34,662 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-12-07 12:19:34,663 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-12-07 12:19:34,665 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-12-07 12:19:34,666 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-12-07 12:19:34,667 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-12-07 12:19:34,668 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-12-07 12:19:34,668 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-12-07 12:19:34,669 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-12-07 12:19:34,670 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-12-07 12:19:34,671 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-12-07 12:19:34,671 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-12-07 12:19:34,672 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-12-07 12:19:34,674 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-12-07 12:19:34,676 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-12-07 12:19:34,677 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-12-07 12:19:34,678 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-12-07 12:19:34,679 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-12-07 12:19:34,680 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-12-07 12:19:34,682 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-12-07 12:19:34,682 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-12-07 12:19:34,682 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-12-07 12:19:34,683 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-12-07 12:19:34,683 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-12-07 12:19:34,684 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-12-07 12:19:34,684 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-12-07 12:19:34,684 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-12-07 12:19:34,685 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-12-07 12:19:34,685 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-12-07 12:19:34,686 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-12-07 12:19:34,686 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-12-07 12:19:34,687 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-12-07 12:19:34,687 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-12-07 12:19:34,687 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-12-07 12:19:34,688 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-12-07 12:19:34,688 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-12-07 12:19:34,689 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_2a93a7f8-7dc7-4fb2-875a-85110e797eb5/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-12-07 12:19:34,698 INFO L113 SettingsManager]: Loading preferences was successful [2019-12-07 12:19:34,698 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-12-07 12:19:34,699 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-12-07 12:19:34,699 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-12-07 12:19:34,700 INFO L138 SettingsManager]: * Use SBE=true [2019-12-07 12:19:34,700 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-12-07 12:19:34,700 INFO L138 SettingsManager]: * sizeof long=4 [2019-12-07 12:19:34,700 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-12-07 12:19:34,700 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-12-07 12:19:34,700 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-12-07 12:19:34,700 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-12-07 12:19:34,700 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-12-07 12:19:34,701 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-12-07 12:19:34,701 INFO L138 SettingsManager]: * sizeof long double=12 [2019-12-07 12:19:34,701 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-12-07 12:19:34,701 INFO L138 SettingsManager]: * Use constant arrays=true [2019-12-07 12:19:34,701 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-12-07 12:19:34,701 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-12-07 12:19:34,701 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-12-07 12:19:34,701 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-12-07 12:19:34,702 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-12-07 12:19:34,702 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-12-07 12:19:34,702 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-12-07 12:19:34,702 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-12-07 12:19:34,702 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-12-07 12:19:34,702 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-12-07 12:19:34,702 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-12-07 12:19:34,702 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-12-07 12:19:34,703 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2019-12-07 12:19:34,703 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/run_dir_2a93a7f8-7dc7-4fb2-875a-85110e797eb5/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 -> ffdaeeffc8c5fdb555812137dbba1199bd1a626d [2019-12-07 12:19:34,802 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-12-07 12:19:34,812 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-12-07 12:19:34,815 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-12-07 12:19:34,816 INFO L271 PluginConnector]: Initializing CDTParser... [2019-12-07 12:19:34,816 INFO L275 PluginConnector]: CDTParser initialized [2019-12-07 12:19:34,817 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_2a93a7f8-7dc7-4fb2-875a-85110e797eb5/bin/uautomizer/../../sv-benchmarks/c/recursive-simple/fibo_2calls_4-1.c [2019-12-07 12:19:34,862 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_2a93a7f8-7dc7-4fb2-875a-85110e797eb5/bin/uautomizer/data/9e18bf9da/843977bddd274b24aa4b96ad59dfc667/FLAG7b6b66502 [2019-12-07 12:19:35,252 INFO L306 CDTParser]: Found 1 translation units. [2019-12-07 12:19:35,252 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_2a93a7f8-7dc7-4fb2-875a-85110e797eb5/sv-benchmarks/c/recursive-simple/fibo_2calls_4-1.c [2019-12-07 12:19:35,256 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_2a93a7f8-7dc7-4fb2-875a-85110e797eb5/bin/uautomizer/data/9e18bf9da/843977bddd274b24aa4b96ad59dfc667/FLAG7b6b66502 [2019-12-07 12:19:35,264 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_2a93a7f8-7dc7-4fb2-875a-85110e797eb5/bin/uautomizer/data/9e18bf9da/843977bddd274b24aa4b96ad59dfc667 [2019-12-07 12:19:35,266 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-12-07 12:19:35,267 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-12-07 12:19:35,268 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-12-07 12:19:35,268 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-12-07 12:19:35,270 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-12-07 12:19:35,270 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 12:19:35" (1/1) ... [2019-12-07 12:19:35,272 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@15d1e875 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:19:35, skipping insertion in model container [2019-12-07 12:19:35,272 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 12:19:35" (1/1) ... [2019-12-07 12:19:35,277 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-12-07 12:19:35,288 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-12-07 12:19:35,388 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 12:19:35,390 INFO L203 MainTranslator]: Completed pre-run [2019-12-07 12:19:35,436 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 12:19:35,446 INFO L208 MainTranslator]: Completed translation [2019-12-07 12:19:35,447 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:19:35 WrapperNode [2019-12-07 12:19:35,447 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-12-07 12:19:35,448 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-12-07 12:19:35,448 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-12-07 12:19:35,448 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-12-07 12:19:35,456 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:19:35" (1/1) ... [2019-12-07 12:19:35,460 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:19:35" (1/1) ... [2019-12-07 12:19:35,473 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-12-07 12:19:35,473 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-12-07 12:19:35,473 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-12-07 12:19:35,473 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-12-07 12:19:35,479 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:19:35" (1/1) ... [2019-12-07 12:19:35,480 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:19:35" (1/1) ... [2019-12-07 12:19:35,480 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:19:35" (1/1) ... [2019-12-07 12:19:35,480 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:19:35" (1/1) ... [2019-12-07 12:19:35,482 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:19:35" (1/1) ... [2019-12-07 12:19:35,483 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:19:35" (1/1) ... [2019-12-07 12:19:35,484 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:19:35" (1/1) ... [2019-12-07 12:19:35,485 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-12-07 12:19:35,486 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-12-07 12:19:35,486 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-12-07 12:19:35,486 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-12-07 12:19:35,487 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:19:35" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2a93a7f8-7dc7-4fb2-875a-85110e797eb5/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 [2019-12-07 12:19:35,526 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-12-07 12:19:35,526 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-12-07 12:19:35,526 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2019-12-07 12:19:35,526 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2019-12-07 12:19:35,526 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2019-12-07 12:19:35,526 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2019-12-07 12:19:35,633 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-12-07 12:19:35,633 INFO L287 CfgBuilder]: Removed 4 assume(true) statements. [2019-12-07 12:19:35,634 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 12:19:35 BoogieIcfgContainer [2019-12-07 12:19:35,634 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-12-07 12:19:35,634 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-12-07 12:19:35,635 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-12-07 12:19:35,637 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-12-07 12:19:35,637 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.12 12:19:35" (1/3) ... [2019-12-07 12:19:35,638 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1bdc4959 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 12:19:35, skipping insertion in model container [2019-12-07 12:19:35,638 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:19:35" (2/3) ... [2019-12-07 12:19:35,639 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1bdc4959 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 12:19:35, skipping insertion in model container [2019-12-07 12:19:35,639 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 12:19:35" (3/3) ... [2019-12-07 12:19:35,640 INFO L109 eAbstractionObserver]: Analyzing ICFG fibo_2calls_4-1.c [2019-12-07 12:19:35,647 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-12-07 12:19:35,651 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-12-07 12:19:35,658 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-12-07 12:19:35,672 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-12-07 12:19:35,672 INFO L374 AbstractCegarLoop]: Hoare is true [2019-12-07 12:19:35,673 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-12-07 12:19:35,673 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-12-07 12:19:35,673 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-12-07 12:19:35,673 INFO L378 AbstractCegarLoop]: Difference is false [2019-12-07 12:19:35,673 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-12-07 12:19:35,673 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-12-07 12:19:35,686 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states. [2019-12-07 12:19:35,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-12-07 12:19:35,690 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 12:19:35,690 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 12:19:35,691 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 12:19:35,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 12:19:35,694 INFO L82 PathProgramCache]: Analyzing trace with hash 1871295635, now seen corresponding path program 1 times [2019-12-07 12:19:35,700 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 12:19:35,700 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947287171] [2019-12-07 12:19:35,700 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 12:19:35,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:19:35,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:19:35,822 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 12:19:35,822 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947287171] [2019-12-07 12:19:35,823 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 12:19:35,823 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-12-07 12:19:35,824 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876604735] [2019-12-07 12:19:35,828 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-12-07 12:19:35,828 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 12:19:35,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-12-07 12:19:35,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-12-07 12:19:35,842 INFO L87 Difference]: Start difference. First operand 28 states. Second operand 5 states. [2019-12-07 12:19:35,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 12:19:35,908 INFO L93 Difference]: Finished difference Result 38 states and 47 transitions. [2019-12-07 12:19:35,909 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-12-07 12:19:35,910 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2019-12-07 12:19:35,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 12:19:35,917 INFO L225 Difference]: With dead ends: 38 [2019-12-07 12:19:35,917 INFO L226 Difference]: Without dead ends: 26 [2019-12-07 12:19:35,919 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-12-07 12:19:35,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-12-07 12:19:35,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2019-12-07 12:19:35,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-12-07 12:19:35,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 33 transitions. [2019-12-07 12:19:35,953 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 33 transitions. Word has length 9 [2019-12-07 12:19:35,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 12:19:35,953 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 33 transitions. [2019-12-07 12:19:35,953 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-12-07 12:19:35,953 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 33 transitions. [2019-12-07 12:19:35,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-12-07 12:19:35,955 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 12:19:35,955 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 12:19:35,955 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 12:19:35,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 12:19:35,955 INFO L82 PathProgramCache]: Analyzing trace with hash -1404217650, now seen corresponding path program 1 times [2019-12-07 12:19:35,955 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 12:19:35,956 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825274755] [2019-12-07 12:19:35,956 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 12:19:35,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:19:35,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:19:35,991 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 12:19:35,991 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825274755] [2019-12-07 12:19:35,991 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 12:19:35,992 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-12-07 12:19:35,992 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054386655] [2019-12-07 12:19:35,993 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-12-07 12:19:35,993 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 12:19:35,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-12-07 12:19:35,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-12-07 12:19:35,993 INFO L87 Difference]: Start difference. First operand 26 states and 33 transitions. Second operand 5 states. [2019-12-07 12:19:36,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 12:19:36,040 INFO L93 Difference]: Finished difference Result 32 states and 40 transitions. [2019-12-07 12:19:36,040 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-12-07 12:19:36,040 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2019-12-07 12:19:36,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 12:19:36,041 INFO L225 Difference]: With dead ends: 32 [2019-12-07 12:19:36,041 INFO L226 Difference]: Without dead ends: 28 [2019-12-07 12:19:36,042 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-12-07 12:19:36,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-12-07 12:19:36,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 26. [2019-12-07 12:19:36,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-12-07 12:19:36,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 33 transitions. [2019-12-07 12:19:36,048 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 33 transitions. Word has length 10 [2019-12-07 12:19:36,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 12:19:36,048 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 33 transitions. [2019-12-07 12:19:36,048 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-12-07 12:19:36,048 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 33 transitions. [2019-12-07 12:19:36,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-12-07 12:19:36,049 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 12:19:36,049 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 12:19:36,049 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 12:19:36,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 12:19:36,050 INFO L82 PathProgramCache]: Analyzing trace with hash -1629927371, now seen corresponding path program 1 times [2019-12-07 12:19:36,050 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 12:19:36,050 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714157443] [2019-12-07 12:19:36,050 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 12:19:36,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:19:36,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:19:36,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:19:36,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:19:36,130 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-07 12:19:36,131 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714157443] [2019-12-07 12:19:36,131 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [506314309] [2019-12-07 12:19:36,131 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2a93a7f8-7dc7-4fb2-875a-85110e797eb5/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 [2019-12-07 12:19:36,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:19:36,158 INFO L264 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 6 conjunts are in the unsatisfiable core [2019-12-07 12:19:36,161 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 12:19:36,202 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-07 12:19:36,202 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 12:19:36,203 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2019-12-07 12:19:36,203 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851053814] [2019-12-07 12:19:36,203 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-07 12:19:36,204 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 12:19:36,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-07 12:19:36,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2019-12-07 12:19:36,204 INFO L87 Difference]: Start difference. First operand 26 states and 33 transitions. Second operand 10 states. [2019-12-07 12:19:36,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 12:19:36,286 INFO L93 Difference]: Finished difference Result 59 states and 83 transitions. [2019-12-07 12:19:36,286 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-07 12:19:36,286 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 22 [2019-12-07 12:19:36,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 12:19:36,287 INFO L225 Difference]: With dead ends: 59 [2019-12-07 12:19:36,287 INFO L226 Difference]: Without dead ends: 35 [2019-12-07 12:19:36,288 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2019-12-07 12:19:36,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-12-07 12:19:36,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 33. [2019-12-07 12:19:36,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-12-07 12:19:36,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 42 transitions. [2019-12-07 12:19:36,294 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 42 transitions. Word has length 22 [2019-12-07 12:19:36,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 12:19:36,294 INFO L462 AbstractCegarLoop]: Abstraction has 33 states and 42 transitions. [2019-12-07 12:19:36,294 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-07 12:19:36,294 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 42 transitions. [2019-12-07 12:19:36,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-12-07 12:19:36,295 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 12:19:36,296 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 12:19:36,496 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 12:19:36,496 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 12:19:36,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 12:19:36,497 INFO L82 PathProgramCache]: Analyzing trace with hash 1285987244, now seen corresponding path program 1 times [2019-12-07 12:19:36,497 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 12:19:36,498 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534273859] [2019-12-07 12:19:36,498 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 12:19:36,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:19:36,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:19:36,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:19:36,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:19:36,622 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-07 12:19:36,622 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534273859] [2019-12-07 12:19:36,623 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [873343445] [2019-12-07 12:19:36,623 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2a93a7f8-7dc7-4fb2-875a-85110e797eb5/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 [2019-12-07 12:19:36,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:19:36,666 INFO L264 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2019-12-07 12:19:36,669 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 12:19:36,711 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-07 12:19:36,712 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 12:19:36,712 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2019-12-07 12:19:36,712 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129225342] [2019-12-07 12:19:36,713 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-07 12:19:36,713 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 12:19:36,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-07 12:19:36,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2019-12-07 12:19:36,714 INFO L87 Difference]: Start difference. First operand 33 states and 42 transitions. Second operand 10 states. [2019-12-07 12:19:36,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 12:19:36,839 INFO L93 Difference]: Finished difference Result 55 states and 78 transitions. [2019-12-07 12:19:36,839 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-07 12:19:36,839 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 23 [2019-12-07 12:19:36,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 12:19:36,842 INFO L225 Difference]: With dead ends: 55 [2019-12-07 12:19:36,843 INFO L226 Difference]: Without dead ends: 51 [2019-12-07 12:19:36,843 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2019-12-07 12:19:36,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2019-12-07 12:19:36,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 48. [2019-12-07 12:19:36,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2019-12-07 12:19:36,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 68 transitions. [2019-12-07 12:19:36,854 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 68 transitions. Word has length 23 [2019-12-07 12:19:36,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 12:19:36,854 INFO L462 AbstractCegarLoop]: Abstraction has 48 states and 68 transitions. [2019-12-07 12:19:36,855 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-07 12:19:36,855 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 68 transitions. [2019-12-07 12:19:36,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2019-12-07 12:19:36,857 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 12:19:36,857 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 12:19:37,057 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 12:19:37,058 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 12:19:37,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 12:19:37,059 INFO L82 PathProgramCache]: Analyzing trace with hash -649262923, now seen corresponding path program 1 times [2019-12-07 12:19:37,060 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 12:19:37,060 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405926903] [2019-12-07 12:19:37,060 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 12:19:37,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:19:37,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:19:37,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:19:37,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:19:37,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:19:37,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:19:37,163 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-12-07 12:19:37,164 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405926903] [2019-12-07 12:19:37,164 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1139942878] [2019-12-07 12:19:37,164 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2a93a7f8-7dc7-4fb2-875a-85110e797eb5/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 [2019-12-07 12:19:37,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:19:37,185 INFO L264 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-07 12:19:37,186 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 12:19:37,222 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-12-07 12:19:37,222 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 12:19:37,223 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2019-12-07 12:19:37,223 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757845423] [2019-12-07 12:19:37,223 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-07 12:19:37,223 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 12:19:37,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-07 12:19:37,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2019-12-07 12:19:37,224 INFO L87 Difference]: Start difference. First operand 48 states and 68 transitions. Second operand 12 states. [2019-12-07 12:19:37,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 12:19:37,410 INFO L93 Difference]: Finished difference Result 114 states and 187 transitions. [2019-12-07 12:19:37,411 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-12-07 12:19:37,411 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 35 [2019-12-07 12:19:37,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 12:19:37,413 INFO L225 Difference]: With dead ends: 114 [2019-12-07 12:19:37,413 INFO L226 Difference]: Without dead ends: 68 [2019-12-07 12:19:37,414 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=302, Unknown=0, NotChecked=0, Total=380 [2019-12-07 12:19:37,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2019-12-07 12:19:37,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 66. [2019-12-07 12:19:37,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2019-12-07 12:19:37,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 98 transitions. [2019-12-07 12:19:37,426 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 98 transitions. Word has length 35 [2019-12-07 12:19:37,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 12:19:37,426 INFO L462 AbstractCegarLoop]: Abstraction has 66 states and 98 transitions. [2019-12-07 12:19:37,426 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-07 12:19:37,426 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 98 transitions. [2019-12-07 12:19:37,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2019-12-07 12:19:37,428 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 12:19:37,428 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 12:19:37,628 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 12:19:37,629 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 12:19:37,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 12:19:37,630 INFO L82 PathProgramCache]: Analyzing trace with hash 2000747716, now seen corresponding path program 1 times [2019-12-07 12:19:37,630 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 12:19:37,630 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025735107] [2019-12-07 12:19:37,631 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 12:19:37,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:19:37,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:19:37,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:19:37,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:19:37,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:19:37,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:19:37,712 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-12-07 12:19:37,712 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025735107] [2019-12-07 12:19:37,712 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1725825291] [2019-12-07 12:19:37,712 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2a93a7f8-7dc7-4fb2-875a-85110e797eb5/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 [2019-12-07 12:19:37,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:19:37,734 INFO L264 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-07 12:19:37,736 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 12:19:37,776 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-12-07 12:19:37,776 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 12:19:37,776 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 12 [2019-12-07 12:19:37,776 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409020488] [2019-12-07 12:19:37,777 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-07 12:19:37,777 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 12:19:37,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-07 12:19:37,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2019-12-07 12:19:37,777 INFO L87 Difference]: Start difference. First operand 66 states and 98 transitions. Second operand 12 states. [2019-12-07 12:19:37,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 12:19:37,921 INFO L93 Difference]: Finished difference Result 147 states and 239 transitions. [2019-12-07 12:19:37,922 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-12-07 12:19:37,922 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 36 [2019-12-07 12:19:37,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 12:19:37,923 INFO L225 Difference]: With dead ends: 147 [2019-12-07 12:19:37,923 INFO L226 Difference]: Without dead ends: 83 [2019-12-07 12:19:37,925 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2019-12-07 12:19:37,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2019-12-07 12:19:37,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 66. [2019-12-07 12:19:37,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2019-12-07 12:19:37,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 96 transitions. [2019-12-07 12:19:37,933 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 96 transitions. Word has length 36 [2019-12-07 12:19:37,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 12:19:37,933 INFO L462 AbstractCegarLoop]: Abstraction has 66 states and 96 transitions. [2019-12-07 12:19:37,933 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-07 12:19:37,933 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 96 transitions. [2019-12-07 12:19:37,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2019-12-07 12:19:37,935 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 12:19:37,935 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 12:19:38,136 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 12:19:38,136 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 12:19:38,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 12:19:38,137 INFO L82 PathProgramCache]: Analyzing trace with hash -434541687, now seen corresponding path program 1 times [2019-12-07 12:19:38,137 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 12:19:38,138 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054032247] [2019-12-07 12:19:38,138 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 12:19:38,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:19:38,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:19:38,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:19:38,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:19:38,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:19:38,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:19:38,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:19:38,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:19:38,268 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2019-12-07 12:19:38,268 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054032247] [2019-12-07 12:19:38,268 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1441432895] [2019-12-07 12:19:38,268 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2a93a7f8-7dc7-4fb2-875a-85110e797eb5/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 [2019-12-07 12:19:38,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:19:38,293 INFO L264 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-07 12:19:38,295 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 12:19:38,328 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-12-07 12:19:38,328 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 12:19:38,328 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 15 [2019-12-07 12:19:38,328 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967120396] [2019-12-07 12:19:38,329 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-12-07 12:19:38,329 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 12:19:38,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-12-07 12:19:38,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2019-12-07 12:19:38,329 INFO L87 Difference]: Start difference. First operand 66 states and 96 transitions. Second operand 15 states. [2019-12-07 12:19:38,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 12:19:38,537 INFO L93 Difference]: Finished difference Result 163 states and 263 transitions. [2019-12-07 12:19:38,537 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-12-07 12:19:38,537 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 50 [2019-12-07 12:19:38,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 12:19:38,539 INFO L225 Difference]: With dead ends: 163 [2019-12-07 12:19:38,539 INFO L226 Difference]: Without dead ends: 99 [2019-12-07 12:19:38,539 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2019-12-07 12:19:38,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2019-12-07 12:19:38,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 91. [2019-12-07 12:19:38,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2019-12-07 12:19:38,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 143 transitions. [2019-12-07 12:19:38,552 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 143 transitions. Word has length 50 [2019-12-07 12:19:38,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 12:19:38,552 INFO L462 AbstractCegarLoop]: Abstraction has 91 states and 143 transitions. [2019-12-07 12:19:38,552 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-12-07 12:19:38,552 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 143 transitions. [2019-12-07 12:19:38,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2019-12-07 12:19:38,554 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 12:19:38,555 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 12:19:38,755 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 12:19:38,756 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 12:19:38,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 12:19:38,756 INFO L82 PathProgramCache]: Analyzing trace with hash -751947822, now seen corresponding path program 1 times [2019-12-07 12:19:38,756 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 12:19:38,757 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600634712] [2019-12-07 12:19:38,757 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 12:19:38,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:19:38,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:19:38,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:19:38,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:19:38,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:19:38,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:19:38,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:19:38,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:19:38,895 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 19 proven. 11 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-12-07 12:19:38,895 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600634712] [2019-12-07 12:19:38,895 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1678849105] [2019-12-07 12:19:38,896 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2a93a7f8-7dc7-4fb2-875a-85110e797eb5/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 [2019-12-07 12:19:38,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:19:38,918 INFO L264 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 6 conjunts are in the unsatisfiable core [2019-12-07 12:19:38,920 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 12:19:38,954 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 18 proven. 5 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2019-12-07 12:19:38,954 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 12:19:38,954 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 7] total 15 [2019-12-07 12:19:38,955 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553009658] [2019-12-07 12:19:38,955 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-12-07 12:19:38,955 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 12:19:38,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-12-07 12:19:38,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2019-12-07 12:19:38,955 INFO L87 Difference]: Start difference. First operand 91 states and 143 transitions. Second operand 15 states. [2019-12-07 12:19:39,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 12:19:39,154 INFO L93 Difference]: Finished difference Result 182 states and 293 transitions. [2019-12-07 12:19:39,155 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-12-07 12:19:39,155 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 51 [2019-12-07 12:19:39,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 12:19:39,156 INFO L225 Difference]: With dead ends: 182 [2019-12-07 12:19:39,156 INFO L226 Difference]: Without dead ends: 91 [2019-12-07 12:19:39,157 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2019-12-07 12:19:39,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2019-12-07 12:19:39,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 83. [2019-12-07 12:19:39,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2019-12-07 12:19:39,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 123 transitions. [2019-12-07 12:19:39,168 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 123 transitions. Word has length 51 [2019-12-07 12:19:39,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 12:19:39,168 INFO L462 AbstractCegarLoop]: Abstraction has 83 states and 123 transitions. [2019-12-07 12:19:39,168 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-12-07 12:19:39,169 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 123 transitions. [2019-12-07 12:19:39,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2019-12-07 12:19:39,170 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 12:19:39,170 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 12:19:39,373 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 12:19:39,373 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 12:19:39,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 12:19:39,374 INFO L82 PathProgramCache]: Analyzing trace with hash -1674024370, now seen corresponding path program 2 times [2019-12-07 12:19:39,374 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 12:19:39,374 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116475887] [2019-12-07 12:19:39,374 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 12:19:39,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:19:39,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:19:39,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:19:39,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:19:39,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:19:39,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:19:39,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:19:39,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:19:39,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:19:39,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:19:39,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:19:39,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:19:39,637 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 36 proven. 41 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2019-12-07 12:19:39,637 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116475887] [2019-12-07 12:19:39,637 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1747997500] [2019-12-07 12:19:39,637 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2a93a7f8-7dc7-4fb2-875a-85110e797eb5/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 [2019-12-07 12:19:39,667 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-07 12:19:39,668 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 12:19:39,668 INFO L264 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-07 12:19:39,671 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 12:19:39,740 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 44 proven. 16 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2019-12-07 12:19:39,740 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 12:19:39,740 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 9] total 22 [2019-12-07 12:19:39,740 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705926724] [2019-12-07 12:19:39,741 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-12-07 12:19:39,741 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 12:19:39,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-12-07 12:19:39,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2019-12-07 12:19:39,741 INFO L87 Difference]: Start difference. First operand 83 states and 123 transitions. Second operand 22 states. [2019-12-07 12:19:40,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 12:19:40,121 INFO L93 Difference]: Finished difference Result 193 states and 345 transitions. [2019-12-07 12:19:40,121 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-12-07 12:19:40,121 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 77 [2019-12-07 12:19:40,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 12:19:40,122 INFO L225 Difference]: With dead ends: 193 [2019-12-07 12:19:40,123 INFO L226 Difference]: Without dead ends: 87 [2019-12-07 12:19:40,124 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=154, Invalid=838, Unknown=0, NotChecked=0, Total=992 [2019-12-07 12:19:40,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2019-12-07 12:19:40,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 77. [2019-12-07 12:19:40,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2019-12-07 12:19:40,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 98 transitions. [2019-12-07 12:19:40,129 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 98 transitions. Word has length 77 [2019-12-07 12:19:40,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 12:19:40,130 INFO L462 AbstractCegarLoop]: Abstraction has 77 states and 98 transitions. [2019-12-07 12:19:40,130 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-12-07 12:19:40,130 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 98 transitions. [2019-12-07 12:19:40,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2019-12-07 12:19:40,131 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 12:19:40,131 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 12:19:40,331 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 12:19:40,332 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 12:19:40,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 12:19:40,333 INFO L82 PathProgramCache]: Analyzing trace with hash -26046796, now seen corresponding path program 1 times [2019-12-07 12:19:40,333 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 12:19:40,334 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712543848] [2019-12-07 12:19:40,334 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 12:19:40,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:19:40,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:19:40,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:19:40,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:19:40,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:19:40,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:19:40,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:19:40,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:19:40,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:19:40,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:19:40,583 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2019-12-07 12:19:40,584 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712543848] [2019-12-07 12:19:40,584 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [622003429] [2019-12-07 12:19:40,584 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2a93a7f8-7dc7-4fb2-875a-85110e797eb5/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 [2019-12-07 12:19:40,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:19:40,608 INFO L264 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 39 conjunts are in the unsatisfiable core [2019-12-07 12:19:40,610 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 12:19:40,738 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2019-12-07 12:19:40,738 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 12:19:40,739 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 21 [2019-12-07 12:19:40,739 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611606188] [2019-12-07 12:19:40,739 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-12-07 12:19:40,739 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 12:19:40,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-12-07 12:19:40,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=373, Unknown=0, NotChecked=0, Total=420 [2019-12-07 12:19:40,740 INFO L87 Difference]: Start difference. First operand 77 states and 98 transitions. Second operand 21 states. [2019-12-07 12:19:40,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 12:19:40,825 INFO L93 Difference]: Finished difference Result 87 states and 108 transitions. [2019-12-07 12:19:40,825 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-12-07 12:19:40,825 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 64 [2019-12-07 12:19:40,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 12:19:40,826 INFO L225 Difference]: With dead ends: 87 [2019-12-07 12:19:40,826 INFO L226 Difference]: Without dead ends: 83 [2019-12-07 12:19:40,827 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 77 SyntacticMatches, 6 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=47, Invalid=373, Unknown=0, NotChecked=0, Total=420 [2019-12-07 12:19:40,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2019-12-07 12:19:40,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 72. [2019-12-07 12:19:40,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2019-12-07 12:19:40,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 92 transitions. [2019-12-07 12:19:40,832 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 92 transitions. Word has length 64 [2019-12-07 12:19:40,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 12:19:40,833 INFO L462 AbstractCegarLoop]: Abstraction has 72 states and 92 transitions. [2019-12-07 12:19:40,833 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-12-07 12:19:40,833 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 92 transitions. [2019-12-07 12:19:40,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2019-12-07 12:19:40,834 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 12:19:40,834 INFO L410 BasicCegarLoop]: trace histogram [7, 7, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 12:19:41,034 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 12:19:41,035 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 12:19:41,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 12:19:41,036 INFO L82 PathProgramCache]: Analyzing trace with hash 1985146669, now seen corresponding path program 1 times [2019-12-07 12:19:41,036 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 12:19:41,036 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82510975] [2019-12-07 12:19:41,037 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 12:19:41,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:19:41,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:19:41,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:19:41,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:19:41,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:19:41,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:19:41,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:19:41,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:19:41,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:19:41,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:19:41,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:19:41,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:19:41,252 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 39 proven. 38 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2019-12-07 12:19:41,253 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82510975] [2019-12-07 12:19:41,253 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [59139679] [2019-12-07 12:19:41,253 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2a93a7f8-7dc7-4fb2-875a-85110e797eb5/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 [2019-12-07 12:19:41,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:19:41,282 INFO L264 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-07 12:19:41,283 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 12:19:41,341 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 27 proven. 45 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2019-12-07 12:19:41,341 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 12:19:41,341 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 17 [2019-12-07 12:19:41,341 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272349904] [2019-12-07 12:19:41,342 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-12-07 12:19:41,342 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 12:19:41,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-12-07 12:19:41,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2019-12-07 12:19:41,342 INFO L87 Difference]: Start difference. First operand 72 states and 92 transitions. Second operand 17 states. [2019-12-07 12:19:41,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 12:19:41,444 INFO L93 Difference]: Finished difference Result 132 states and 176 transitions. [2019-12-07 12:19:41,444 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-07 12:19:41,444 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 78 [2019-12-07 12:19:41,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 12:19:41,445 INFO L225 Difference]: With dead ends: 132 [2019-12-07 12:19:41,445 INFO L226 Difference]: Without dead ends: 0 [2019-12-07 12:19:41,445 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 94 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2019-12-07 12:19:41,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-12-07 12:19:41,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-12-07 12:19:41,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-12-07 12:19:41,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-12-07 12:19:41,446 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 78 [2019-12-07 12:19:41,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 12:19:41,446 INFO L462 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-12-07 12:19:41,446 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-12-07 12:19:41,446 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-12-07 12:19:41,446 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-12-07 12:19:41,646 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 12:19:41,648 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2019-12-07 12:19:41,967 INFO L246 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2019-12-07 12:19:41,967 INFO L246 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2019-12-07 12:19:41,967 INFO L246 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2019-12-07 12:19:41,967 INFO L246 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 39) no Hoare annotation was computed. [2019-12-07 12:19:41,967 INFO L242 CegarLoopResult]: At program point L41(lines 35 42) the Hoare annotation is: (<= 4 ULTIMATE.start_main_~x~0) [2019-12-07 12:19:41,967 INFO L246 CegarLoopResult]: For program point L39(line 39) no Hoare annotation was computed. [2019-12-07 12:19:41,968 INFO L246 CegarLoopResult]: For program point L38(lines 38 40) no Hoare annotation was computed. [2019-12-07 12:19:41,968 INFO L242 CegarLoopResult]: At program point L37(line 37) the Hoare annotation is: (and (<= ULTIMATE.start_main_~x~0 4) (<= 4 ULTIMATE.start_main_~x~0)) [2019-12-07 12:19:41,968 INFO L246 CegarLoopResult]: For program point L37-1(line 37) no Hoare annotation was computed. [2019-12-07 12:19:41,968 INFO L246 CegarLoopResult]: For program point L38-2(lines 38 40) no Hoare annotation was computed. [2019-12-07 12:19:41,968 INFO L249 CegarLoopResult]: At program point fibo2ENTRY(lines 17 25) the Hoare annotation is: true [2019-12-07 12:19:41,968 INFO L242 CegarLoopResult]: At program point L23(line 23) the Hoare annotation is: (and (not (<= |fibo2_#in~n| 1)) (= fibo2_~n |fibo2_#in~n|)) [2019-12-07 12:19:41,968 INFO L246 CegarLoopResult]: For program point L23-1(line 23) no Hoare annotation was computed. [2019-12-07 12:19:41,968 INFO L242 CegarLoopResult]: At program point L23-2(line 23) the Hoare annotation is: (and (< 1 fibo2_~n) (or (and (<= 1 |fibo2_#t~ret2|) (<= |fibo2_#t~ret2| 1)) (<= 4 fibo2_~n)) (= fibo2_~n |fibo2_#in~n|)) [2019-12-07 12:19:41,968 INFO L246 CegarLoopResult]: For program point L20(lines 20 24) no Hoare annotation was computed. [2019-12-07 12:19:41,968 INFO L246 CegarLoopResult]: For program point L23-3(line 23) no Hoare annotation was computed. [2019-12-07 12:19:41,968 INFO L246 CegarLoopResult]: For program point L18(lines 18 24) no Hoare annotation was computed. [2019-12-07 12:19:41,968 INFO L246 CegarLoopResult]: For program point fibo2FINAL(lines 17 25) no Hoare annotation was computed. [2019-12-07 12:19:41,968 INFO L246 CegarLoopResult]: For program point fibo2EXIT(lines 17 25) no Hoare annotation was computed. [2019-12-07 12:19:41,968 INFO L249 CegarLoopResult]: At program point fibo1ENTRY(lines 7 15) the Hoare annotation is: true [2019-12-07 12:19:41,969 INFO L242 CegarLoopResult]: At program point L13(line 13) the Hoare annotation is: (and (not (<= |fibo1_#in~n| 2)) (= fibo1_~n |fibo1_#in~n|)) [2019-12-07 12:19:41,969 INFO L246 CegarLoopResult]: For program point L13-1(line 13) no Hoare annotation was computed. [2019-12-07 12:19:41,969 INFO L242 CegarLoopResult]: At program point L13-2(line 13) the Hoare annotation is: (and (or (and (<= 1 |fibo1_#t~ret0|) (<= |fibo1_#in~n| 3) (<= |fibo1_#t~ret0| 1)) (and (<= 2 |fibo1_#t~ret0|) (<= |fibo1_#t~ret0| 2) (<= 4 fibo1_~n)) (<= 5 |fibo1_#in~n|)) (not (<= |fibo1_#in~n| 2)) (= fibo1_~n |fibo1_#in~n|)) [2019-12-07 12:19:41,969 INFO L246 CegarLoopResult]: For program point fibo1FINAL(lines 7 15) no Hoare annotation was computed. [2019-12-07 12:19:41,969 INFO L246 CegarLoopResult]: For program point L10(lines 10 14) no Hoare annotation was computed. [2019-12-07 12:19:41,969 INFO L246 CegarLoopResult]: For program point L13-3(line 13) no Hoare annotation was computed. [2019-12-07 12:19:41,969 INFO L246 CegarLoopResult]: For program point L8(lines 8 14) no Hoare annotation was computed. [2019-12-07 12:19:41,969 INFO L246 CegarLoopResult]: For program point fibo1EXIT(lines 7 15) no Hoare annotation was computed. [2019-12-07 12:19:41,979 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.12 12:19:41 BoogieIcfgContainer [2019-12-07 12:19:41,979 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-12-07 12:19:41,980 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-12-07 12:19:41,980 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-12-07 12:19:41,980 INFO L275 PluginConnector]: Witness Printer initialized [2019-12-07 12:19:41,980 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 12:19:35" (3/4) ... [2019-12-07 12:19:41,982 INFO L137 WitnessPrinter]: Generating witness for correct program [2019-12-07 12:19:41,986 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure fibo2 [2019-12-07 12:19:41,986 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure fibo1 [2019-12-07 12:19:41,989 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2019-12-07 12:19:41,989 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2019-12-07 12:19:42,019 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_2a93a7f8-7dc7-4fb2-875a-85110e797eb5/bin/uautomizer/witness.graphml [2019-12-07 12:19:42,019 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-12-07 12:19:42,020 INFO L168 Benchmark]: Toolchain (without parser) took 6752.92 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 148.4 MB). Free memory was 943.5 MB in the beginning and 949.3 MB in the end (delta: -5.7 MB). Peak memory consumption was 142.6 MB. Max. memory is 11.5 GB. [2019-12-07 12:19:42,021 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 1.0 GB. Free memory is still 958.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 12:19:42,021 INFO L168 Benchmark]: CACSL2BoogieTranslator took 179.53 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 99.1 MB). Free memory was 943.5 MB in the beginning and 1.1 GB in the end (delta: -152.9 MB). Peak memory consumption was 23.4 MB. Max. memory is 11.5 GB. [2019-12-07 12:19:42,021 INFO L168 Benchmark]: Boogie Procedure Inliner took 25.52 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 12:19:42,021 INFO L168 Benchmark]: Boogie Preprocessor took 12.44 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. [2019-12-07 12:19:42,022 INFO L168 Benchmark]: RCFGBuilder took 148.03 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 16.5 MB). Peak memory consumption was 16.5 MB. Max. memory is 11.5 GB. [2019-12-07 12:19:42,022 INFO L168 Benchmark]: TraceAbstraction took 6344.90 ms. Allocated memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: 49.3 MB). Free memory was 1.1 GB in the beginning and 957.4 MB in the end (delta: 119.9 MB). Peak memory consumption was 169.2 MB. Max. memory is 11.5 GB. [2019-12-07 12:19:42,022 INFO L168 Benchmark]: Witness Printer took 39.41 ms. Allocated memory is still 1.2 GB. Free memory was 957.4 MB in the beginning and 949.3 MB in the end (delta: 8.1 MB). Peak memory consumption was 8.1 MB. Max. memory is 11.5 GB. [2019-12-07 12:19:42,024 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 1.0 GB. Free memory is still 958.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 179.53 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 99.1 MB). Free memory was 943.5 MB in the beginning and 1.1 GB in the end (delta: -152.9 MB). Peak memory consumption was 23.4 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 25.52 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 12.44 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. * RCFGBuilder took 148.03 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 16.5 MB). Peak memory consumption was 16.5 MB. Max. memory is 11.5 GB. * TraceAbstraction took 6344.90 ms. Allocated memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: 49.3 MB). Free memory was 1.1 GB in the beginning and 957.4 MB in the end (delta: 119.9 MB). Peak memory consumption was 169.2 MB. Max. memory is 11.5 GB. * Witness Printer took 39.41 ms. Allocated memory is still 1.2 GB. Free memory was 957.4 MB in the beginning and 949.3 MB in the end (delta: 8.1 MB). Peak memory consumption was 8.1 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 39]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 35]: Loop Invariant Derived loop invariant: 4 <= x - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 28 locations, 1 error locations. Result: SAFE, OverallTime: 5.9s, OverallIterations: 11, TraceHistogramMax: 7, AutomataDifference: 1.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.3s, HoareTripleCheckerStatistics: 275 SDtfs, 401 SDslu, 1859 SDs, 0 SdLazy, 2341 SolverSat, 330 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 706 GetRequests, 537 SyntacticMatches, 7 SemanticMatches, 162 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 482 ImplicationChecksByTransitivity, 1.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=91occurred in iteration=7, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 11 MinimizatonAttempts, 63 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 311 PreInvPairs, 397 NumberOfFragments, 78 HoareAnnotationTreeSize, 311 FomulaSimplifications, 1143 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 8 FomulaSimplificationsInter, 1164 FormulaSimplificationTreeSizeReductionInter, 0.2s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.8s InterpolantComputationTime, 891 NumberOfCodeBlocks, 891 NumberOfCodeBlocksAsserted, 21 NumberOfCheckSat, 871 ConstructedInterpolants, 0 QuantifiedInterpolants, 114027 SizeOfPredicates, 31 NumberOfNonLiveVariables, 986 ConjunctsInSsa, 101 ConjunctsInUnsatCore, 20 InterpolantComputations, 2 PerfectInterpolantSequences, 686/962 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...