./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive-simple/fibo_2calls_5-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6b5699aa Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_99f18b86-bfd1-4ebb-9e5b-43dc20f4f818/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_99f18b86-bfd1-4ebb-9e5b-43dc20f4f818/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_99f18b86-bfd1-4ebb-9e5b-43dc20f4f818/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_99f18b86-bfd1-4ebb-9e5b-43dc20f4f818/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive-simple/fibo_2calls_5-1.c -s /tmp/vcloud-vcloud-master/worker/run_dir_99f18b86-bfd1-4ebb-9e5b-43dc20f4f818/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_99f18b86-bfd1-4ebb-9e5b-43dc20f4f818/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 e6092b6e2bef07c2401a6d2b7c5ee309bc5dbc34 ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.24-6b5699a [2019-11-25 08:53:09,701 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-25 08:53:09,703 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-25 08:53:09,719 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-25 08:53:09,720 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-25 08:53:09,721 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-25 08:53:09,723 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-25 08:53:09,732 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-25 08:53:09,737 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-25 08:53:09,741 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-25 08:53:09,742 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-25 08:53:09,743 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-25 08:53:09,744 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-25 08:53:09,746 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-25 08:53:09,747 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-25 08:53:09,748 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-25 08:53:09,749 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-25 08:53:09,750 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-25 08:53:09,753 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-25 08:53:09,757 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-25 08:53:09,760 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-25 08:53:09,764 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-25 08:53:09,766 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-25 08:53:09,766 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-25 08:53:09,770 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-25 08:53:09,770 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-25 08:53:09,770 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-25 08:53:09,772 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-25 08:53:09,772 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-25 08:53:09,773 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-25 08:53:09,773 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-25 08:53:09,774 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-25 08:53:09,775 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-25 08:53:09,776 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-25 08:53:09,777 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-25 08:53:09,777 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-25 08:53:09,777 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-25 08:53:09,778 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-25 08:53:09,778 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-25 08:53:09,779 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-25 08:53:09,780 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-25 08:53:09,781 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_99f18b86-bfd1-4ebb-9e5b-43dc20f4f818/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-25 08:53:09,805 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-25 08:53:09,815 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-25 08:53:09,816 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-25 08:53:09,817 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-25 08:53:09,817 INFO L138 SettingsManager]: * Use SBE=true [2019-11-25 08:53:09,817 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-25 08:53:09,817 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-25 08:53:09,818 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-25 08:53:09,818 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-25 08:53:09,818 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-25 08:53:09,818 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-25 08:53:09,818 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-25 08:53:09,819 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-25 08:53:09,819 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-25 08:53:09,819 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-25 08:53:09,819 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-25 08:53:09,819 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-25 08:53:09,820 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-25 08:53:09,820 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-25 08:53:09,820 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-25 08:53:09,820 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-25 08:53:09,820 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-25 08:53:09,821 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-25 08:53:09,821 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-25 08:53:09,822 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-25 08:53:09,822 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-25 08:53:09,823 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-25 08:53:09,823 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-25 08:53:09,823 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_99f18b86-bfd1-4ebb-9e5b-43dc20f4f818/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 -> e6092b6e2bef07c2401a6d2b7c5ee309bc5dbc34 [2019-11-25 08:53:09,997 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-25 08:53:10,011 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-25 08:53:10,014 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-25 08:53:10,015 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-25 08:53:10,015 INFO L275 PluginConnector]: CDTParser initialized [2019-11-25 08:53:10,016 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_99f18b86-bfd1-4ebb-9e5b-43dc20f4f818/bin/uautomizer/../../sv-benchmarks/c/recursive-simple/fibo_2calls_5-1.c [2019-11-25 08:53:10,076 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_99f18b86-bfd1-4ebb-9e5b-43dc20f4f818/bin/uautomizer/data/805a29810/99760678fcd24d9cbacea96d5829449a/FLAG932611ca7 [2019-11-25 08:53:10,460 INFO L306 CDTParser]: Found 1 translation units. [2019-11-25 08:53:10,460 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_99f18b86-bfd1-4ebb-9e5b-43dc20f4f818/sv-benchmarks/c/recursive-simple/fibo_2calls_5-1.c [2019-11-25 08:53:10,466 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_99f18b86-bfd1-4ebb-9e5b-43dc20f4f818/bin/uautomizer/data/805a29810/99760678fcd24d9cbacea96d5829449a/FLAG932611ca7 [2019-11-25 08:53:10,894 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_99f18b86-bfd1-4ebb-9e5b-43dc20f4f818/bin/uautomizer/data/805a29810/99760678fcd24d9cbacea96d5829449a [2019-11-25 08:53:10,897 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-25 08:53:10,898 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-25 08:53:10,903 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-25 08:53:10,903 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-25 08:53:10,906 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-25 08:53:10,906 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 08:53:10" (1/1) ... [2019-11-25 08:53:10,908 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@18a2a056 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:53:10, skipping insertion in model container [2019-11-25 08:53:10,908 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 08:53:10" (1/1) ... [2019-11-25 08:53:10,919 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-25 08:53:10,936 INFO L179 MainTranslator]: Built tables and reachable declarations [2019-11-25 08:53:11,096 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-25 08:53:11,100 INFO L201 MainTranslator]: Completed pre-run [2019-11-25 08:53:11,193 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-25 08:53:11,206 INFO L205 MainTranslator]: Completed translation [2019-11-25 08:53:11,207 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:53:11 WrapperNode [2019-11-25 08:53:11,207 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-25 08:53:11,208 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-25 08:53:11,208 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-25 08:53:11,208 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-25 08:53:11,216 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:53:11" (1/1) ... [2019-11-25 08:53:11,221 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:53:11" (1/1) ... [2019-11-25 08:53:11,235 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-25 08:53:11,236 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-25 08:53:11,236 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-25 08:53:11,236 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-25 08:53:11,245 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:53:11" (1/1) ... [2019-11-25 08:53:11,245 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:53:11" (1/1) ... [2019-11-25 08:53:11,246 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:53:11" (1/1) ... [2019-11-25 08:53:11,246 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:53:11" (1/1) ... [2019-11-25 08:53:11,248 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:53:11" (1/1) ... [2019-11-25 08:53:11,251 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:53:11" (1/1) ... [2019-11-25 08:53:11,252 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:53:11" (1/1) ... [2019-11-25 08:53:11,253 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-25 08:53:11,254 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-25 08:53:11,254 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-25 08:53:11,254 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-25 08:53:11,255 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:53:11" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_99f18b86-bfd1-4ebb-9e5b-43dc20f4f818/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 [2019-11-25 08:53:11,316 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-25 08:53:11,316 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-25 08:53:11,317 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2019-11-25 08:53:11,317 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2019-11-25 08:53:11,317 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2019-11-25 08:53:11,317 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2019-11-25 08:53:11,489 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-25 08:53:11,489 INFO L284 CfgBuilder]: Removed 4 assume(true) statements. [2019-11-25 08:53:11,490 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:53:11 BoogieIcfgContainer [2019-11-25 08:53:11,491 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-25 08:53:11,492 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-25 08:53:11,492 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-25 08:53:11,495 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-25 08:53:11,495 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 08:53:10" (1/3) ... [2019-11-25 08:53:11,496 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f095080 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 08:53:11, skipping insertion in model container [2019-11-25 08:53:11,496 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:53:11" (2/3) ... [2019-11-25 08:53:11,496 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f095080 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 08:53:11, skipping insertion in model container [2019-11-25 08:53:11,496 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:53:11" (3/3) ... [2019-11-25 08:53:11,498 INFO L109 eAbstractionObserver]: Analyzing ICFG fibo_2calls_5-1.c [2019-11-25 08:53:11,506 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-25 08:53:11,512 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-25 08:53:11,522 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-25 08:53:11,571 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-25 08:53:11,571 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-25 08:53:11,572 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-25 08:53:11,572 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-25 08:53:11,572 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-25 08:53:11,572 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-25 08:53:11,573 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-25 08:53:11,573 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-25 08:53:11,601 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states. [2019-11-25 08:53:11,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-11-25 08:53:11,606 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:53:11,607 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:53:11,607 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-25 08:53:11,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:53:11,613 INFO L82 PathProgramCache]: Analyzing trace with hash 1871295635, now seen corresponding path program 1 times [2019-11-25 08:53:11,621 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:53:11,621 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119305008] [2019-11-25 08:53:11,622 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:53:11,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:11,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:11,803 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:53:11,804 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119305008] [2019-11-25 08:53:11,804 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-25 08:53:11,805 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-25 08:53:11,806 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243473236] [2019-11-25 08:53:11,810 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-25 08:53:11,811 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-25 08:53:11,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-25 08:53:11,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-25 08:53:11,825 INFO L87 Difference]: Start difference. First operand 28 states. Second operand 5 states. [2019-11-25 08:53:11,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:53:11,912 INFO L93 Difference]: Finished difference Result 38 states and 47 transitions. [2019-11-25 08:53:11,913 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-25 08:53:11,914 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2019-11-25 08:53:11,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:53:11,926 INFO L225 Difference]: With dead ends: 38 [2019-11-25 08:53:11,926 INFO L226 Difference]: Without dead ends: 26 [2019-11-25 08:53:11,932 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 [2019-11-25 08:53:11,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-11-25 08:53:11,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2019-11-25 08:53:11,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-11-25 08:53:11,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 33 transitions. [2019-11-25 08:53:11,976 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 33 transitions. Word has length 9 [2019-11-25 08:53:11,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:53:11,977 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 33 transitions. [2019-11-25 08:53:11,977 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-25 08:53:11,977 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 33 transitions. [2019-11-25 08:53:11,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-25 08:53:11,978 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:53:11,978 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:53:11,979 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-25 08:53:11,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:53:11,979 INFO L82 PathProgramCache]: Analyzing trace with hash -1404217650, now seen corresponding path program 1 times [2019-11-25 08:53:11,979 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:53:11,980 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520152147] [2019-11-25 08:53:11,980 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:53:11,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:12,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:12,033 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:53:12,033 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520152147] [2019-11-25 08:53:12,033 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-25 08:53:12,033 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-25 08:53:12,034 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646290479] [2019-11-25 08:53:12,035 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-25 08:53:12,036 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-25 08:53:12,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-25 08:53:12,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-25 08:53:12,036 INFO L87 Difference]: Start difference. First operand 26 states and 33 transitions. Second operand 5 states. [2019-11-25 08:53:12,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:53:12,092 INFO L93 Difference]: Finished difference Result 32 states and 40 transitions. [2019-11-25 08:53:12,093 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-25 08:53:12,093 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2019-11-25 08:53:12,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:53:12,095 INFO L225 Difference]: With dead ends: 32 [2019-11-25 08:53:12,095 INFO L226 Difference]: Without dead ends: 28 [2019-11-25 08:53:12,096 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 [2019-11-25 08:53:12,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-11-25 08:53:12,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 26. [2019-11-25 08:53:12,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-11-25 08:53:12,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 33 transitions. [2019-11-25 08:53:12,103 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 33 transitions. Word has length 10 [2019-11-25 08:53:12,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:53:12,103 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 33 transitions. [2019-11-25 08:53:12,103 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-25 08:53:12,103 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 33 transitions. [2019-11-25 08:53:12,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-11-25 08:53:12,104 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:53:12,105 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:53:12,105 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-25 08:53:12,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:53:12,105 INFO L82 PathProgramCache]: Analyzing trace with hash -1629927371, now seen corresponding path program 1 times [2019-11-25 08:53:12,105 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:53:12,106 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813536774] [2019-11-25 08:53:12,106 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:53:12,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:12,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:12,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:12,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:12,230 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-25 08:53:12,230 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813536774] [2019-11-25 08:53:12,230 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1181776554] [2019-11-25 08:53:12,231 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_99f18b86-bfd1-4ebb-9e5b-43dc20f4f818/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 [2019-11-25 08:53:12,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:12,278 INFO L255 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-25 08:53:12,283 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:53:12,362 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-25 08:53:12,363 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-25 08:53:12,363 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2019-11-25 08:53:12,363 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395567477] [2019-11-25 08:53:12,364 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-25 08:53:12,364 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-25 08:53:12,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-25 08:53:12,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2019-11-25 08:53:12,364 INFO L87 Difference]: Start difference. First operand 26 states and 33 transitions. Second operand 10 states. [2019-11-25 08:53:12,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:53:12,518 INFO L93 Difference]: Finished difference Result 59 states and 83 transitions. [2019-11-25 08:53:12,519 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-25 08:53:12,519 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 22 [2019-11-25 08:53:12,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:53:12,520 INFO L225 Difference]: With dead ends: 59 [2019-11-25 08:53:12,520 INFO L226 Difference]: Without dead ends: 35 [2019-11-25 08:53:12,521 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2019-11-25 08:53:12,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-11-25 08:53:12,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 33. [2019-11-25 08:53:12,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-11-25 08:53:12,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 42 transitions. [2019-11-25 08:53:12,530 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 42 transitions. Word has length 22 [2019-11-25 08:53:12,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:53:12,530 INFO L462 AbstractCegarLoop]: Abstraction has 33 states and 42 transitions. [2019-11-25 08:53:12,530 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-25 08:53:12,530 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 42 transitions. [2019-11-25 08:53:12,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-11-25 08:53:12,532 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:53:12,532 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] [2019-11-25 08:53:12,737 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:53:12,737 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-25 08:53:12,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:53:12,738 INFO L82 PathProgramCache]: Analyzing trace with hash 1285987244, now seen corresponding path program 1 times [2019-11-25 08:53:12,738 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:53:12,738 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215459487] [2019-11-25 08:53:12,738 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:53:12,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:12,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:12,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:12,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:12,869 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-25 08:53:12,869 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215459487] [2019-11-25 08:53:12,870 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1666082186] [2019-11-25 08:53:12,870 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_99f18b86-bfd1-4ebb-9e5b-43dc20f4f818/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 [2019-11-25 08:53:12,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:12,899 INFO L255 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-25 08:53:12,901 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:53:12,940 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-25 08:53:12,940 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-25 08:53:12,940 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2019-11-25 08:53:12,941 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362991987] [2019-11-25 08:53:12,941 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-25 08:53:12,941 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-25 08:53:12,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-25 08:53:12,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2019-11-25 08:53:12,942 INFO L87 Difference]: Start difference. First operand 33 states and 42 transitions. Second operand 10 states. [2019-11-25 08:53:13,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:53:13,174 INFO L93 Difference]: Finished difference Result 55 states and 78 transitions. [2019-11-25 08:53:13,175 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-25 08:53:13,175 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 23 [2019-11-25 08:53:13,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:53:13,178 INFO L225 Difference]: With dead ends: 55 [2019-11-25 08:53:13,178 INFO L226 Difference]: Without dead ends: 51 [2019-11-25 08:53:13,179 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 [2019-11-25 08:53:13,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2019-11-25 08:53:13,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 48. [2019-11-25 08:53:13,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2019-11-25 08:53:13,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 68 transitions. [2019-11-25 08:53:13,199 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 68 transitions. Word has length 23 [2019-11-25 08:53:13,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:53:13,200 INFO L462 AbstractCegarLoop]: Abstraction has 48 states and 68 transitions. [2019-11-25 08:53:13,200 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-25 08:53:13,200 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 68 transitions. [2019-11-25 08:53:13,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2019-11-25 08:53:13,209 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:53:13,209 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] [2019-11-25 08:53:13,412 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:53:13,414 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-25 08:53:13,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:53:13,414 INFO L82 PathProgramCache]: Analyzing trace with hash -649262923, now seen corresponding path program 1 times [2019-11-25 08:53:13,414 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:53:13,414 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778340328] [2019-11-25 08:53:13,414 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:53:13,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:13,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:13,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:13,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:13,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:13,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:13,544 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-25 08:53:13,544 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778340328] [2019-11-25 08:53:13,544 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1027034480] [2019-11-25 08:53:13,544 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_99f18b86-bfd1-4ebb-9e5b-43dc20f4f818/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 [2019-11-25 08:53:13,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:13,590 INFO L255 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-25 08:53:13,592 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:53:13,657 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-25 08:53:13,657 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-25 08:53:13,657 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2019-11-25 08:53:13,658 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527008661] [2019-11-25 08:53:13,658 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-25 08:53:13,659 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-25 08:53:13,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-25 08:53:13,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2019-11-25 08:53:13,659 INFO L87 Difference]: Start difference. First operand 48 states and 68 transitions. Second operand 12 states. [2019-11-25 08:53:14,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:53:14,008 INFO L93 Difference]: Finished difference Result 114 states and 187 transitions. [2019-11-25 08:53:14,009 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-11-25 08:53:14,009 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 35 [2019-11-25 08:53:14,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:53:14,012 INFO L225 Difference]: With dead ends: 114 [2019-11-25 08:53:14,012 INFO L226 Difference]: Without dead ends: 68 [2019-11-25 08:53:14,014 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=78, Invalid=302, Unknown=0, NotChecked=0, Total=380 [2019-11-25 08:53:14,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2019-11-25 08:53:14,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 66. [2019-11-25 08:53:14,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2019-11-25 08:53:14,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 98 transitions. [2019-11-25 08:53:14,028 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 98 transitions. Word has length 35 [2019-11-25 08:53:14,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:53:14,029 INFO L462 AbstractCegarLoop]: Abstraction has 66 states and 98 transitions. [2019-11-25 08:53:14,029 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-25 08:53:14,029 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 98 transitions. [2019-11-25 08:53:14,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2019-11-25 08:53:14,031 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:53:14,031 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] [2019-11-25 08:53:14,241 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:53:14,241 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-25 08:53:14,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:53:14,242 INFO L82 PathProgramCache]: Analyzing trace with hash 2000747716, now seen corresponding path program 1 times [2019-11-25 08:53:14,242 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:53:14,242 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181385573] [2019-11-25 08:53:14,243 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:53:14,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:14,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:14,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:14,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:14,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:14,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:14,380 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-11-25 08:53:14,381 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181385573] [2019-11-25 08:53:14,381 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [933495130] [2019-11-25 08:53:14,381 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_99f18b86-bfd1-4ebb-9e5b-43dc20f4f818/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 [2019-11-25 08:53:14,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:14,421 INFO L255 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-25 08:53:14,423 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:53:14,483 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-25 08:53:14,483 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-25 08:53:14,483 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 12 [2019-11-25 08:53:14,483 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910250178] [2019-11-25 08:53:14,484 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-25 08:53:14,484 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-25 08:53:14,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-25 08:53:14,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2019-11-25 08:53:14,485 INFO L87 Difference]: Start difference. First operand 66 states and 98 transitions. Second operand 12 states. [2019-11-25 08:53:14,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:53:14,756 INFO L93 Difference]: Finished difference Result 147 states and 239 transitions. [2019-11-25 08:53:14,757 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-25 08:53:14,757 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 36 [2019-11-25 08:53:14,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:53:14,760 INFO L225 Difference]: With dead ends: 147 [2019-11-25 08:53:14,760 INFO L226 Difference]: Without dead ends: 83 [2019-11-25 08:53:14,762 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2019-11-25 08:53:14,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2019-11-25 08:53:14,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 66. [2019-11-25 08:53:14,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2019-11-25 08:53:14,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 96 transitions. [2019-11-25 08:53:14,792 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 96 transitions. Word has length 36 [2019-11-25 08:53:14,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:53:14,792 INFO L462 AbstractCegarLoop]: Abstraction has 66 states and 96 transitions. [2019-11-25 08:53:14,793 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-25 08:53:14,793 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 96 transitions. [2019-11-25 08:53:14,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2019-11-25 08:53:14,797 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:53:14,798 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] [2019-11-25 08:53:15,000 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:53:15,001 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-25 08:53:15,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:53:15,001 INFO L82 PathProgramCache]: Analyzing trace with hash -434541687, now seen corresponding path program 1 times [2019-11-25 08:53:15,001 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:53:15,001 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316406791] [2019-11-25 08:53:15,001 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:53:15,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:15,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:15,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:15,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:15,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:15,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:15,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:15,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:15,230 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2019-11-25 08:53:15,230 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316406791] [2019-11-25 08:53:15,231 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1282472392] [2019-11-25 08:53:15,231 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_99f18b86-bfd1-4ebb-9e5b-43dc20f4f818/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 [2019-11-25 08:53:15,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:15,290 INFO L255 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-25 08:53:15,292 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:53:15,375 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-11-25 08:53:15,376 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-25 08:53:15,376 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 16 [2019-11-25 08:53:15,376 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645782562] [2019-11-25 08:53:15,377 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-11-25 08:53:15,377 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-25 08:53:15,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-11-25 08:53:15,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2019-11-25 08:53:15,377 INFO L87 Difference]: Start difference. First operand 66 states and 96 transitions. Second operand 16 states. [2019-11-25 08:53:15,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:53:15,877 INFO L93 Difference]: Finished difference Result 164 states and 279 transitions. [2019-11-25 08:53:15,878 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-11-25 08:53:15,878 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 50 [2019-11-25 08:53:15,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:53:15,880 INFO L225 Difference]: With dead ends: 164 [2019-11-25 08:53:15,880 INFO L226 Difference]: Without dead ends: 100 [2019-11-25 08:53:15,881 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=111, Invalid=489, Unknown=0, NotChecked=0, Total=600 [2019-11-25 08:53:15,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2019-11-25 08:53:15,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 89. [2019-11-25 08:53:15,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2019-11-25 08:53:15,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 145 transitions. [2019-11-25 08:53:15,899 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 145 transitions. Word has length 50 [2019-11-25 08:53:15,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:53:15,899 INFO L462 AbstractCegarLoop]: Abstraction has 89 states and 145 transitions. [2019-11-25 08:53:15,900 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-11-25 08:53:15,900 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 145 transitions. [2019-11-25 08:53:15,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2019-11-25 08:53:15,902 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:53:15,902 INFO L410 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:53:16,113 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:53:16,114 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-25 08:53:16,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:53:16,114 INFO L82 PathProgramCache]: Analyzing trace with hash -1917551255, now seen corresponding path program 1 times [2019-11-25 08:53:16,114 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:53:16,114 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689827353] [2019-11-25 08:53:16,114 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:53:16,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:16,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:16,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:16,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:16,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:16,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:16,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:16,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:16,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:16,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:16,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:16,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:16,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:16,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:16,385 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 33 proven. 58 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2019-11-25 08:53:16,386 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689827353] [2019-11-25 08:53:16,386 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [161036825] [2019-11-25 08:53:16,386 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_99f18b86-bfd1-4ebb-9e5b-43dc20f4f818/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 [2019-11-25 08:53:16,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:16,440 INFO L255 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-25 08:53:16,452 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:53:16,532 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 23 proven. 65 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2019-11-25 08:53:16,533 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-25 08:53:16,534 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 17 [2019-11-25 08:53:16,535 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508528404] [2019-11-25 08:53:16,535 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-11-25 08:53:16,535 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-25 08:53:16,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-11-25 08:53:16,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2019-11-25 08:53:16,536 INFO L87 Difference]: Start difference. First operand 89 states and 145 transitions. Second operand 17 states. [2019-11-25 08:53:16,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:53:16,990 INFO L93 Difference]: Finished difference Result 222 states and 415 transitions. [2019-11-25 08:53:16,991 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-11-25 08:53:16,991 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 91 [2019-11-25 08:53:16,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:53:16,993 INFO L225 Difference]: With dead ends: 222 [2019-11-25 08:53:16,994 INFO L226 Difference]: Without dead ends: 138 [2019-11-25 08:53:16,995 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=112, Invalid=538, Unknown=0, NotChecked=0, Total=650 [2019-11-25 08:53:16,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2019-11-25 08:53:17,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 112. [2019-11-25 08:53:17,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2019-11-25 08:53:17,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 186 transitions. [2019-11-25 08:53:17,032 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 186 transitions. Word has length 91 [2019-11-25 08:53:17,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:53:17,033 INFO L462 AbstractCegarLoop]: Abstraction has 112 states and 186 transitions. [2019-11-25 08:53:17,033 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-11-25 08:53:17,033 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 186 transitions. [2019-11-25 08:53:17,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2019-11-25 08:53:17,038 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:53:17,039 INFO L410 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 8, 7, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:53:17,241 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:53:17,249 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-25 08:53:17,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:53:17,249 INFO L82 PathProgramCache]: Analyzing trace with hash -590215841, now seen corresponding path program 2 times [2019-11-25 08:53:17,249 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:53:17,249 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137692398] [2019-11-25 08:53:17,250 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:53:17,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:17,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:17,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:17,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:17,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:17,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:17,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:17,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:17,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:17,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:17,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:17,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:17,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:17,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:17,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:17,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:17,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:17,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:17,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:17,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:17,735 INFO L134 CoverageAnalysis]: Checked inductivity of 437 backedges. 100 proven. 152 refuted. 0 times theorem prover too weak. 185 trivial. 0 not checked. [2019-11-25 08:53:17,736 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137692398] [2019-11-25 08:53:17,736 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1732638794] [2019-11-25 08:53:17,736 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_99f18b86-bfd1-4ebb-9e5b-43dc20f4f818/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 [2019-11-25 08:53:17,826 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-25 08:53:17,826 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-25 08:53:17,827 INFO L255 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-25 08:53:17,832 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:53:17,967 INFO L134 CoverageAnalysis]: Checked inductivity of 437 backedges. 81 proven. 83 refuted. 0 times theorem prover too weak. 273 trivial. 0 not checked. [2019-11-25 08:53:17,967 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-25 08:53:17,967 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 10] total 26 [2019-11-25 08:53:17,968 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708116615] [2019-11-25 08:53:17,968 INFO L442 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-11-25 08:53:17,968 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-25 08:53:17,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-11-25 08:53:17,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=563, Unknown=0, NotChecked=0, Total=650 [2019-11-25 08:53:17,969 INFO L87 Difference]: Start difference. First operand 112 states and 186 transitions. Second operand 26 states. [2019-11-25 08:53:18,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:53:18,831 INFO L93 Difference]: Finished difference Result 285 states and 569 transitions. [2019-11-25 08:53:18,832 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2019-11-25 08:53:18,832 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 132 [2019-11-25 08:53:18,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:53:18,833 INFO L225 Difference]: With dead ends: 285 [2019-11-25 08:53:18,834 INFO L226 Difference]: Without dead ends: 105 [2019-11-25 08:53:18,836 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 420 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=244, Invalid=1478, Unknown=0, NotChecked=0, Total=1722 [2019-11-25 08:53:18,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2019-11-25 08:53:18,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 83. [2019-11-25 08:53:18,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2019-11-25 08:53:18,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 108 transitions. [2019-11-25 08:53:18,861 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 108 transitions. Word has length 132 [2019-11-25 08:53:18,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:53:18,863 INFO L462 AbstractCegarLoop]: Abstraction has 83 states and 108 transitions. [2019-11-25 08:53:18,863 INFO L463 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-11-25 08:53:18,863 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 108 transitions. [2019-11-25 08:53:18,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2019-11-25 08:53:18,864 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:53:18,865 INFO L410 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 7, 7, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:53:19,068 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:53:19,076 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-25 08:53:19,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:53:19,076 INFO L82 PathProgramCache]: Analyzing trace with hash 350372983, now seen corresponding path program 3 times [2019-11-25 08:53:19,077 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:53:19,077 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296841166] [2019-11-25 08:53:19,077 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:53:19,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:19,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:19,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:19,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:19,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:19,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:19,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:19,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:19,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:19,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:19,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:19,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:19,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:19,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:19,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:19,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:19,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:19,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:19,434 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 105 proven. 103 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2019-11-25 08:53:19,434 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296841166] [2019-11-25 08:53:19,435 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [775804493] [2019-11-25 08:53:19,435 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_99f18b86-bfd1-4ebb-9e5b-43dc20f4f818/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 [2019-11-25 08:53:19,483 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2019-11-25 08:53:19,483 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-25 08:53:19,484 INFO L255 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-25 08:53:19,495 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:53:19,588 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 139 proven. 18 refuted. 0 times theorem prover too weak. 189 trivial. 0 not checked. [2019-11-25 08:53:19,589 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-25 08:53:19,589 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 10] total 23 [2019-11-25 08:53:19,589 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108329242] [2019-11-25 08:53:19,591 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-11-25 08:53:19,591 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-25 08:53:19,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-11-25 08:53:19,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2019-11-25 08:53:19,592 INFO L87 Difference]: Start difference. First operand 83 states and 108 transitions. Second operand 23 states. [2019-11-25 08:53:20,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:53:20,243 INFO L93 Difference]: Finished difference Result 176 states and 247 transitions. [2019-11-25 08:53:20,243 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-11-25 08:53:20,244 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 119 [2019-11-25 08:53:20,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:53:20,245 INFO L225 Difference]: With dead ends: 176 [2019-11-25 08:53:20,245 INFO L226 Difference]: Without dead ends: 86 [2019-11-25 08:53:20,247 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 271 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=203, Invalid=1057, Unknown=0, NotChecked=0, Total=1260 [2019-11-25 08:53:20,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2019-11-25 08:53:20,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 83. [2019-11-25 08:53:20,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2019-11-25 08:53:20,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 100 transitions. [2019-11-25 08:53:20,262 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 100 transitions. Word has length 119 [2019-11-25 08:53:20,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:53:20,263 INFO L462 AbstractCegarLoop]: Abstraction has 83 states and 100 transitions. [2019-11-25 08:53:20,263 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-11-25 08:53:20,263 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 100 transitions. [2019-11-25 08:53:20,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2019-11-25 08:53:20,265 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:53:20,266 INFO L410 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:53:20,478 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:53:20,478 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-25 08:53:20,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:53:20,479 INFO L82 PathProgramCache]: Analyzing trace with hash 1882786525, now seen corresponding path program 4 times [2019-11-25 08:53:20,479 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:53:20,485 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239705236] [2019-11-25 08:53:20,486 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:53:20,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:20,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:20,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:20,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:20,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:20,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:20,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:20,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:20,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:20,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:20,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:20,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:20,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:20,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:20,786 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 60 proven. 49 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2019-11-25 08:53:20,787 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239705236] [2019-11-25 08:53:20,787 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [631102263] [2019-11-25 08:53:20,788 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_99f18b86-bfd1-4ebb-9e5b-43dc20f4f818/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 [2019-11-25 08:53:20,836 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-25 08:53:20,836 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-25 08:53:20,837 INFO L255 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-25 08:53:20,840 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:53:20,893 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 58 proven. 15 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2019-11-25 08:53:20,893 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-25 08:53:20,893 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 8] total 19 [2019-11-25 08:53:20,894 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23823716] [2019-11-25 08:53:20,895 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-11-25 08:53:20,895 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-25 08:53:20,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-11-25 08:53:20,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2019-11-25 08:53:20,896 INFO L87 Difference]: Start difference. First operand 83 states and 100 transitions. Second operand 19 states. [2019-11-25 08:53:21,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:53:21,199 INFO L93 Difference]: Finished difference Result 103 states and 122 transitions. [2019-11-25 08:53:21,200 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-11-25 08:53:21,200 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 91 [2019-11-25 08:53:21,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:53:21,201 INFO L225 Difference]: With dead ends: 103 [2019-11-25 08:53:21,201 INFO L226 Difference]: Without dead ends: 92 [2019-11-25 08:53:21,202 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=101, Invalid=499, Unknown=0, NotChecked=0, Total=600 [2019-11-25 08:53:21,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2019-11-25 08:53:21,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 87. [2019-11-25 08:53:21,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2019-11-25 08:53:21,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 102 transitions. [2019-11-25 08:53:21,210 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 102 transitions. Word has length 91 [2019-11-25 08:53:21,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:53:21,210 INFO L462 AbstractCegarLoop]: Abstraction has 87 states and 102 transitions. [2019-11-25 08:53:21,210 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-11-25 08:53:21,210 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 102 transitions. [2019-11-25 08:53:21,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2019-11-25 08:53:21,212 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:53:21,212 INFO L410 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 6, 6, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:53:21,425 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:53:21,426 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-25 08:53:21,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:53:21,426 INFO L82 PathProgramCache]: Analyzing trace with hash -1335172610, now seen corresponding path program 5 times [2019-11-25 08:53:21,427 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:53:21,427 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267572710] [2019-11-25 08:53:21,427 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:53:21,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:21,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:21,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:21,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:21,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:21,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:21,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:21,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:21,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:21,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:21,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:21,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:22,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:22,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:22,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:22,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:22,068 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2019-11-25 08:53:22,068 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267572710] [2019-11-25 08:53:22,069 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1875761252] [2019-11-25 08:53:22,069 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_99f18b86-bfd1-4ebb-9e5b-43dc20f4f818/bin/uautomizer/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:53:22,125 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2019-11-25 08:53:22,125 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-25 08:53:22,127 INFO L255 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 63 conjunts are in the unsatisfiable core [2019-11-25 08:53:22,129 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:53:22,600 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2019-11-25 08:53:22,600 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-25 08:53:22,600 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 28 [2019-11-25 08:53:22,601 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119853965] [2019-11-25 08:53:22,601 INFO L442 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-11-25 08:53:22,601 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-25 08:53:22,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-11-25 08:53:22,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=691, Unknown=0, NotChecked=0, Total=756 [2019-11-25 08:53:22,602 INFO L87 Difference]: Start difference. First operand 87 states and 102 transitions. Second operand 28 states. [2019-11-25 08:53:22,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:53:22,841 INFO L93 Difference]: Finished difference Result 100 states and 116 transitions. [2019-11-25 08:53:22,841 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-11-25 08:53:22,841 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 105 [2019-11-25 08:53:22,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:53:22,842 INFO L225 Difference]: With dead ends: 100 [2019-11-25 08:53:22,843 INFO L226 Difference]: Without dead ends: 90 [2019-11-25 08:53:22,843 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 133 SyntacticMatches, 8 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=65, Invalid=691, Unknown=0, NotChecked=0, Total=756 [2019-11-25 08:53:22,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2019-11-25 08:53:22,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 89. [2019-11-25 08:53:22,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2019-11-25 08:53:22,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 105 transitions. [2019-11-25 08:53:22,850 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 105 transitions. Word has length 105 [2019-11-25 08:53:22,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:53:22,850 INFO L462 AbstractCegarLoop]: Abstraction has 89 states and 105 transitions. [2019-11-25 08:53:22,851 INFO L463 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-11-25 08:53:22,851 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 105 transitions. [2019-11-25 08:53:22,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2019-11-25 08:53:22,852 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:53:22,852 INFO L410 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 6, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:53:23,056 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:53:23,056 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-25 08:53:23,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:53:23,056 INFO L82 PathProgramCache]: Analyzing trace with hash 1449179333, now seen corresponding path program 6 times [2019-11-25 08:53:23,057 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:53:23,057 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817378495] [2019-11-25 08:53:23,057 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:53:23,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:23,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:23,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:23,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:23,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:23,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:23,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:23,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:23,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:23,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:23,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:23,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:23,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:23,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:23,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:23,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:23,177 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 71 proven. 6 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2019-11-25 08:53:23,177 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817378495] [2019-11-25 08:53:23,177 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1075259556] [2019-11-25 08:53:23,178 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_99f18b86-bfd1-4ebb-9e5b-43dc20f4f818/bin/uautomizer/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:53:23,229 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2019-11-25 08:53:23,230 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-25 08:53:23,230 INFO L255 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-25 08:53:23,233 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:53:23,257 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 118 proven. 0 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2019-11-25 08:53:23,258 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-25 08:53:23,258 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 7 [2019-11-25 08:53:23,259 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079754362] [2019-11-25 08:53:23,259 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-25 08:53:23,259 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-25 08:53:23,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-25 08:53:23,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-11-25 08:53:23,260 INFO L87 Difference]: Start difference. First operand 89 states and 105 transitions. Second operand 6 states. [2019-11-25 08:53:23,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:53:23,319 INFO L93 Difference]: Finished difference Result 101 states and 117 transitions. [2019-11-25 08:53:23,320 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-25 08:53:23,320 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 104 [2019-11-25 08:53:23,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:53:23,320 INFO L225 Difference]: With dead ends: 101 [2019-11-25 08:53:23,321 INFO L226 Difference]: Without dead ends: 0 [2019-11-25 08:53:23,321 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 135 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-11-25 08:53:23,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-11-25 08:53:23,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-11-25 08:53:23,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-11-25 08:53:23,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-11-25 08:53:23,322 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 104 [2019-11-25 08:53:23,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:53:23,322 INFO L462 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-11-25 08:53:23,322 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-25 08:53:23,322 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-11-25 08:53:23,322 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-11-25 08:53:23,526 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:53:23,530 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2019-11-25 08:53:24,078 WARN L192 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 25 [2019-11-25 08:53:24,310 WARN L192 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 22 [2019-11-25 08:53:24,313 INFO L444 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2019-11-25 08:53:24,313 INFO L444 ceAbstractionStarter]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2019-11-25 08:53:24,313 INFO L444 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2019-11-25 08:53:24,313 INFO L444 ceAbstractionStarter]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 39) no Hoare annotation was computed. [2019-11-25 08:53:24,313 INFO L440 ceAbstractionStarter]: At program point L41(lines 35 42) the Hoare annotation is: (<= 5 ULTIMATE.start_main_~x~0) [2019-11-25 08:53:24,313 INFO L444 ceAbstractionStarter]: For program point L39(line 39) no Hoare annotation was computed. [2019-11-25 08:53:24,313 INFO L444 ceAbstractionStarter]: For program point L38(lines 38 40) no Hoare annotation was computed. [2019-11-25 08:53:24,313 INFO L440 ceAbstractionStarter]: At program point L37(line 37) the Hoare annotation is: (and (<= 5 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~x~0 5)) [2019-11-25 08:53:24,314 INFO L444 ceAbstractionStarter]: For program point L37-1(line 37) no Hoare annotation was computed. [2019-11-25 08:53:24,314 INFO L444 ceAbstractionStarter]: For program point L38-2(lines 38 40) no Hoare annotation was computed. [2019-11-25 08:53:24,314 INFO L447 ceAbstractionStarter]: At program point fibo2ENTRY(lines 17 25) the Hoare annotation is: true [2019-11-25 08:53:24,314 INFO L440 ceAbstractionStarter]: At program point L23(line 23) the Hoare annotation is: (and (= fibo2_~n |fibo2_#in~n|) (not (<= |fibo2_#in~n| 2))) [2019-11-25 08:53:24,314 INFO L444 ceAbstractionStarter]: For program point L23-1(line 23) no Hoare annotation was computed. [2019-11-25 08:53:24,314 INFO L440 ceAbstractionStarter]: At program point L23-2(line 23) the Hoare annotation is: (and (or (and (<= 1 |fibo2_#t~ret2|) (<= |fibo2_#t~ret2| 1)) (<= 4 fibo2_~n)) (let ((.cse0 (= fibo2_~n |fibo2_#in~n|))) (or (and (<= |fibo2_#in~n| 3) .cse0) (and (<= |fibo2_#t~ret2| 2) .cse0 (<= 2 |fibo2_#t~ret2|)) (and (<= 5 |fibo2_#in~n|) .cse0))) (not (<= |fibo2_#in~n| 2))) [2019-11-25 08:53:24,314 INFO L444 ceAbstractionStarter]: For program point L20(lines 20 24) no Hoare annotation was computed. [2019-11-25 08:53:24,314 INFO L444 ceAbstractionStarter]: For program point L23-3(line 23) no Hoare annotation was computed. [2019-11-25 08:53:24,314 INFO L444 ceAbstractionStarter]: For program point L18(lines 18 24) no Hoare annotation was computed. [2019-11-25 08:53:24,314 INFO L444 ceAbstractionStarter]: For program point fibo2FINAL(lines 17 25) no Hoare annotation was computed. [2019-11-25 08:53:24,315 INFO L444 ceAbstractionStarter]: For program point fibo2EXIT(lines 17 25) no Hoare annotation was computed. [2019-11-25 08:53:24,315 INFO L447 ceAbstractionStarter]: At program point fibo1ENTRY(lines 7 15) the Hoare annotation is: true [2019-11-25 08:53:24,315 INFO L440 ceAbstractionStarter]: At program point L13(line 13) the Hoare annotation is: (and (not (<= |fibo1_#in~n| 1)) (= fibo1_~n |fibo1_#in~n|)) [2019-11-25 08:53:24,315 INFO L444 ceAbstractionStarter]: For program point L13-1(line 13) no Hoare annotation was computed. [2019-11-25 08:53:24,315 INFO L440 ceAbstractionStarter]: At program point L13-2(line 13) the Hoare annotation is: (and (let ((.cse0 (= fibo1_~n |fibo1_#in~n|))) (or (and (<= 4 fibo1_~n) .cse0) (and (<= 1 |fibo1_#t~ret0|) (<= |fibo1_#t~ret0| 1) .cse0))) (< 1 fibo1_~n) (or (<= 6 |fibo1_#in~n|) (and (<= 3 |fibo1_#t~ret0|) (<= |fibo1_#t~ret0| 3)) (<= |fibo1_#in~n| 4))) [2019-11-25 08:53:24,315 INFO L444 ceAbstractionStarter]: For program point fibo1FINAL(lines 7 15) no Hoare annotation was computed. [2019-11-25 08:53:24,315 INFO L444 ceAbstractionStarter]: For program point L10(lines 10 14) no Hoare annotation was computed. [2019-11-25 08:53:24,315 INFO L444 ceAbstractionStarter]: For program point L13-3(line 13) no Hoare annotation was computed. [2019-11-25 08:53:24,315 INFO L444 ceAbstractionStarter]: For program point L8(lines 8 14) no Hoare annotation was computed. [2019-11-25 08:53:24,315 INFO L444 ceAbstractionStarter]: For program point fibo1EXIT(lines 7 15) no Hoare annotation was computed. [2019-11-25 08:53:24,326 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.11 08:53:24 BoogieIcfgContainer [2019-11-25 08:53:24,326 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-25 08:53:24,327 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-25 08:53:24,327 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-25 08:53:24,327 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-25 08:53:24,327 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:53:11" (3/4) ... [2019-11-25 08:53:24,330 INFO L137 WitnessPrinter]: Generating witness for correct program [2019-11-25 08:53:24,336 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure fibo2 [2019-11-25 08:53:24,336 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure fibo1 [2019-11-25 08:53:24,340 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2019-11-25 08:53:24,341 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2019-11-25 08:53:24,381 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_99f18b86-bfd1-4ebb-9e5b-43dc20f4f818/bin/uautomizer/witness.graphml [2019-11-25 08:53:24,381 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-25 08:53:24,383 INFO L168 Benchmark]: Toolchain (without parser) took 13484.65 ms. Allocated memory was 1.0 GB in the beginning and 1.4 GB in the end (delta: 346.0 MB). Free memory was 951.4 MB in the beginning and 1.2 GB in the end (delta: -211.8 MB). Peak memory consumption was 134.2 MB. Max. memory is 11.5 GB. [2019-11-25 08:53:24,383 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 1.0 GB. Free memory is still 967.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-25 08:53:24,384 INFO L168 Benchmark]: CACSL2BoogieTranslator took 304.60 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 130.0 MB). Free memory was 951.4 MB in the beginning and 1.1 GB in the end (delta: -173.2 MB). Peak memory consumption was 23.2 MB. Max. memory is 11.5 GB. [2019-11-25 08:53:24,384 INFO L168 Benchmark]: Boogie Procedure Inliner took 27.82 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-25 08:53:24,385 INFO L168 Benchmark]: Boogie Preprocessor took 17.59 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 3.4 MB). Peak memory consumption was 3.4 MB. Max. memory is 11.5 GB. [2019-11-25 08:53:24,386 INFO L168 Benchmark]: RCFGBuilder took 237.01 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 21.6 MB). Peak memory consumption was 21.6 MB. Max. memory is 11.5 GB. [2019-11-25 08:53:24,386 INFO L168 Benchmark]: TraceAbstraction took 12834.69 ms. Allocated memory was 1.2 GB in the beginning and 1.4 GB in the end (delta: 216.0 MB). Free memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: -67.2 MB). Peak memory consumption was 148.8 MB. Max. memory is 11.5 GB. [2019-11-25 08:53:24,387 INFO L168 Benchmark]: Witness Printer took 55.03 ms. Allocated memory is still 1.4 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 3.6 MB). Peak memory consumption was 3.6 MB. Max. memory is 11.5 GB. [2019-11-25 08:53:24,390 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 1.0 GB. Free memory is still 967.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 304.60 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 130.0 MB). Free memory was 951.4 MB in the beginning and 1.1 GB in the end (delta: -173.2 MB). Peak memory consumption was 23.2 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 27.82 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 17.59 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 3.4 MB). Peak memory consumption was 3.4 MB. Max. memory is 11.5 GB. * RCFGBuilder took 237.01 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 21.6 MB). Peak memory consumption was 21.6 MB. Max. memory is 11.5 GB. * TraceAbstraction took 12834.69 ms. Allocated memory was 1.2 GB in the beginning and 1.4 GB in the end (delta: 216.0 MB). Free memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: -67.2 MB). Peak memory consumption was 148.8 MB. Max. memory is 11.5 GB. * Witness Printer took 55.03 ms. Allocated memory is still 1.4 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 3.6 MB). Peak memory consumption was 3.6 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: 5 <= x - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 28 locations, 1 error locations. Result: SAFE, OverallTime: 12.7s, OverallIterations: 13, TraceHistogramMax: 10, AutomataDifference: 4.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.7s, HoareTripleCheckerStatistics: 350 SDtfs, 544 SDslu, 2847 SDs, 0 SdLazy, 3648 SolverSat, 546 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1266 GetRequests, 1021 SyntacticMatches, 10 SemanticMatches, 235 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1129 ImplicationChecksByTransitivity, 3.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=112occurred in iteration=8, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 13 MinimizatonAttempts, 94 StatesRemovedByMinimization, 11 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 368 PreInvPairs, 511 NumberOfFragments, 105 HoareAnnotationTreeSize, 368 FomulaSimplifications, 1916 FormulaSimplificationTreeSizeReduction, 0.2s HoareSimplificationTime, 8 FomulaSimplificationsInter, 3623 FormulaSimplificationTreeSizeReductionInter, 0.5s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 4.0s InterpolantComputationTime, 1635 NumberOfCodeBlocks, 1541 NumberOfCodeBlocksAsserted, 38 NumberOfCheckSat, 1611 ConstructedInterpolants, 0 QuantifiedInterpolants, 319341 SizeOfPredicates, 41 NumberOfNonLiveVariables, 1595 ConjunctsInSsa, 145 ConjunctsInUnsatCore, 24 InterpolantComputations, 3 PerfectInterpolantSequences, 2724/3528 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...