./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive-simple/fibo_2calls_6-1.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_13a90392-cf0f-4915-b2b2-c11d6738ecd6/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_13a90392-cf0f-4915-b2b2-c11d6738ecd6/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_13a90392-cf0f-4915-b2b2-c11d6738ecd6/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_13a90392-cf0f-4915-b2b2-c11d6738ecd6/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive-simple/fibo_2calls_6-1.c -s /tmp/vcloud-vcloud-master/worker/run_dir_13a90392-cf0f-4915-b2b2-c11d6738ecd6/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_13a90392-cf0f-4915-b2b2-c11d6738ecd6/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 595c6555624af5bbcf79585a20acb2500e3eeee8 .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 08:54:49,671 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-25 08:54:49,673 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-25 08:54:49,683 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-25 08:54:49,683 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-25 08:54:49,684 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-25 08:54:49,685 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-25 08:54:49,687 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-25 08:54:49,698 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-25 08:54:49,700 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-25 08:54:49,702 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-25 08:54:49,703 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-25 08:54:49,704 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-25 08:54:49,706 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-25 08:54:49,708 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-25 08:54:49,709 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-25 08:54:49,710 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-25 08:54:49,713 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-25 08:54:49,716 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-25 08:54:49,719 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-25 08:54:49,723 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-25 08:54:49,726 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-25 08:54:49,730 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-25 08:54:49,732 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-25 08:54:49,734 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-25 08:54:49,736 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-25 08:54:49,736 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-25 08:54:49,737 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-25 08:54:49,739 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-25 08:54:49,740 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-25 08:54:49,741 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-25 08:54:49,741 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-25 08:54:49,742 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-25 08:54:49,743 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-25 08:54:49,745 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-25 08:54:49,745 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-25 08:54:49,746 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-25 08:54:49,747 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-25 08:54:49,747 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-25 08:54:49,749 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-25 08:54:49,750 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-25 08:54:49,751 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_13a90392-cf0f-4915-b2b2-c11d6738ecd6/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-25 08:54:49,775 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-25 08:54:49,775 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-25 08:54:49,776 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-25 08:54:49,776 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-25 08:54:49,777 INFO L138 SettingsManager]: * Use SBE=true [2019-11-25 08:54:49,777 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-25 08:54:49,777 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-25 08:54:49,777 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-25 08:54:49,777 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-25 08:54:49,778 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-25 08:54:49,778 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-25 08:54:49,778 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-25 08:54:49,778 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-25 08:54:49,779 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-25 08:54:49,779 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-25 08:54:49,779 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-25 08:54:49,779 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-25 08:54:49,779 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-25 08:54:49,780 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-25 08:54:49,780 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-25 08:54:49,780 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-25 08:54:49,780 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-25 08:54:49,781 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-25 08:54:49,781 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-25 08:54:49,781 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-25 08:54:49,781 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-25 08:54:49,781 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-25 08:54:49,782 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-25 08:54:49,782 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_13a90392-cf0f-4915-b2b2-c11d6738ecd6/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 -> 595c6555624af5bbcf79585a20acb2500e3eeee8 [2019-11-25 08:54:49,920 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-25 08:54:49,931 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-25 08:54:49,934 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-25 08:54:49,936 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-25 08:54:49,937 INFO L275 PluginConnector]: CDTParser initialized [2019-11-25 08:54:49,937 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_13a90392-cf0f-4915-b2b2-c11d6738ecd6/bin/uautomizer/../../sv-benchmarks/c/recursive-simple/fibo_2calls_6-1.c [2019-11-25 08:54:50,000 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_13a90392-cf0f-4915-b2b2-c11d6738ecd6/bin/uautomizer/data/4d539a3c3/de99069955b2466283fd8142ec3c6827/FLAGe252c6c7c [2019-11-25 08:54:50,387 INFO L306 CDTParser]: Found 1 translation units. [2019-11-25 08:54:50,388 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_13a90392-cf0f-4915-b2b2-c11d6738ecd6/sv-benchmarks/c/recursive-simple/fibo_2calls_6-1.c [2019-11-25 08:54:50,396 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_13a90392-cf0f-4915-b2b2-c11d6738ecd6/bin/uautomizer/data/4d539a3c3/de99069955b2466283fd8142ec3c6827/FLAGe252c6c7c [2019-11-25 08:54:50,412 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_13a90392-cf0f-4915-b2b2-c11d6738ecd6/bin/uautomizer/data/4d539a3c3/de99069955b2466283fd8142ec3c6827 [2019-11-25 08:54:50,415 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-25 08:54:50,416 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-25 08:54:50,417 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-25 08:54:50,418 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-25 08:54:50,423 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-25 08:54:50,424 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 08:54:50" (1/1) ... [2019-11-25 08:54:50,426 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@55cf0eae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:54:50, skipping insertion in model container [2019-11-25 08:54:50,427 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 08:54:50" (1/1) ... [2019-11-25 08:54:50,434 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-25 08:54:50,454 INFO L179 MainTranslator]: Built tables and reachable declarations [2019-11-25 08:54:50,598 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-25 08:54:50,601 INFO L201 MainTranslator]: Completed pre-run [2019-11-25 08:54:50,674 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-25 08:54:50,691 INFO L205 MainTranslator]: Completed translation [2019-11-25 08:54:50,691 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:54:50 WrapperNode [2019-11-25 08:54:50,692 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-25 08:54:50,692 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-25 08:54:50,692 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-25 08:54:50,692 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-25 08:54:50,699 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:54:50" (1/1) ... [2019-11-25 08:54:50,704 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:54:50" (1/1) ... [2019-11-25 08:54:50,720 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-25 08:54:50,720 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-25 08:54:50,720 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-25 08:54:50,720 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-25 08:54:50,729 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:54:50" (1/1) ... [2019-11-25 08:54:50,729 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:54:50" (1/1) ... [2019-11-25 08:54:50,730 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:54:50" (1/1) ... [2019-11-25 08:54:50,730 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:54:50" (1/1) ... [2019-11-25 08:54:50,732 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:54:50" (1/1) ... [2019-11-25 08:54:50,734 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:54:50" (1/1) ... [2019-11-25 08:54:50,735 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:54:50" (1/1) ... [2019-11-25 08:54:50,736 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-25 08:54:50,737 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-25 08:54:50,737 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-25 08:54:50,737 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-25 08:54:50,738 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:54:50" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_13a90392-cf0f-4915-b2b2-c11d6738ecd6/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 08:54:50,819 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-25 08:54:50,820 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-25 08:54:50,820 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2019-11-25 08:54:50,820 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2019-11-25 08:54:50,821 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2019-11-25 08:54:50,821 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2019-11-25 08:54:51,031 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-25 08:54:51,031 INFO L284 CfgBuilder]: Removed 4 assume(true) statements. [2019-11-25 08:54:51,032 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:54:51 BoogieIcfgContainer [2019-11-25 08:54:51,033 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-25 08:54:51,034 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-25 08:54:51,034 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-25 08:54:51,036 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-25 08:54:51,037 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 08:54:50" (1/3) ... [2019-11-25 08:54:51,038 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@81b20d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 08:54:51, skipping insertion in model container [2019-11-25 08:54:51,038 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:54:50" (2/3) ... [2019-11-25 08:54:51,038 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@81b20d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 08:54:51, skipping insertion in model container [2019-11-25 08:54:51,038 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:54:51" (3/3) ... [2019-11-25 08:54:51,040 INFO L109 eAbstractionObserver]: Analyzing ICFG fibo_2calls_6-1.c [2019-11-25 08:54:51,048 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-25 08:54:51,054 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-25 08:54:51,064 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-25 08:54:51,103 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-25 08:54:51,103 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-25 08:54:51,103 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-25 08:54:51,103 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-25 08:54:51,104 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-25 08:54:51,104 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-25 08:54:51,104 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-25 08:54:51,104 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-25 08:54:51,123 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states. [2019-11-25 08:54:51,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-11-25 08:54:51,129 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:54:51,130 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:54:51,130 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-25 08:54:51,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:54:51,136 INFO L82 PathProgramCache]: Analyzing trace with hash 1871295635, now seen corresponding path program 1 times [2019-11-25 08:54:51,144 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:54:51,144 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375762317] [2019-11-25 08:54:51,145 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:54:51,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:54:51,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:54:51,310 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 08:54:51,311 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375762317] [2019-11-25 08:54:51,312 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-25 08:54:51,312 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-25 08:54:51,315 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331989598] [2019-11-25 08:54:51,318 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-25 08:54:51,318 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-25 08:54:51,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-25 08:54:51,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-25 08:54:51,332 INFO L87 Difference]: Start difference. First operand 28 states. Second operand 5 states. [2019-11-25 08:54:51,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:54:51,424 INFO L93 Difference]: Finished difference Result 38 states and 47 transitions. [2019-11-25 08:54:51,425 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-25 08:54:51,426 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2019-11-25 08:54:51,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:54:51,435 INFO L225 Difference]: With dead ends: 38 [2019-11-25 08:54:51,436 INFO L226 Difference]: Without dead ends: 26 [2019-11-25 08:54:51,438 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 08:54:51,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-11-25 08:54:51,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2019-11-25 08:54:51,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-11-25 08:54:51,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 33 transitions. [2019-11-25 08:54:51,479 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 33 transitions. Word has length 9 [2019-11-25 08:54:51,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:54:51,479 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 33 transitions. [2019-11-25 08:54:51,480 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-25 08:54:51,480 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 33 transitions. [2019-11-25 08:54:51,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-25 08:54:51,481 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:54:51,481 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:54:51,482 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-25 08:54:51,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:54:51,482 INFO L82 PathProgramCache]: Analyzing trace with hash -1404217650, now seen corresponding path program 1 times [2019-11-25 08:54:51,482 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:54:51,483 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870548717] [2019-11-25 08:54:51,483 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:54:51,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:54:51,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:54:51,532 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 08:54:51,532 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870548717] [2019-11-25 08:54:51,533 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-25 08:54:51,533 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-25 08:54:51,533 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066911650] [2019-11-25 08:54:51,534 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-25 08:54:51,535 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-25 08:54:51,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-25 08:54:51,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-25 08:54:51,535 INFO L87 Difference]: Start difference. First operand 26 states and 33 transitions. Second operand 5 states. [2019-11-25 08:54:51,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:54:51,591 INFO L93 Difference]: Finished difference Result 32 states and 40 transitions. [2019-11-25 08:54:51,591 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-25 08:54:51,591 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2019-11-25 08:54:51,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:54:51,593 INFO L225 Difference]: With dead ends: 32 [2019-11-25 08:54:51,593 INFO L226 Difference]: Without dead ends: 28 [2019-11-25 08:54:51,594 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 08:54:51,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-11-25 08:54:51,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 26. [2019-11-25 08:54:51,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-11-25 08:54:51,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 33 transitions. [2019-11-25 08:54:51,601 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 33 transitions. Word has length 10 [2019-11-25 08:54:51,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:54:51,601 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 33 transitions. [2019-11-25 08:54:51,601 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-25 08:54:51,601 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 33 transitions. [2019-11-25 08:54:51,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-11-25 08:54:51,603 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:54:51,603 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 08:54:51,603 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-25 08:54:51,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:54:51,603 INFO L82 PathProgramCache]: Analyzing trace with hash -1629927371, now seen corresponding path program 1 times [2019-11-25 08:54:51,604 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:54:51,604 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688265980] [2019-11-25 08:54:51,604 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:54:51,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:54:51,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:54:51,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:54:51,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:54:51,731 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 08:54:51,731 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688265980] [2019-11-25 08:54:51,731 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [526059873] [2019-11-25 08:54:51,732 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_13a90392-cf0f-4915-b2b2-c11d6738ecd6/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 08:54:51,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:54:51,800 INFO L255 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-25 08:54:51,807 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:54:51,887 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 08:54:51,887 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-25 08:54:51,888 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2019-11-25 08:54:51,888 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457206491] [2019-11-25 08:54:51,888 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-25 08:54:51,889 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-25 08:54:51,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-25 08:54:51,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2019-11-25 08:54:51,889 INFO L87 Difference]: Start difference. First operand 26 states and 33 transitions. Second operand 10 states. [2019-11-25 08:54:52,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:54:52,039 INFO L93 Difference]: Finished difference Result 59 states and 83 transitions. [2019-11-25 08:54:52,040 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-25 08:54:52,040 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 22 [2019-11-25 08:54:52,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:54:52,042 INFO L225 Difference]: With dead ends: 59 [2019-11-25 08:54:52,042 INFO L226 Difference]: Without dead ends: 35 [2019-11-25 08:54:52,043 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2019-11-25 08:54:52,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-11-25 08:54:52,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 33. [2019-11-25 08:54:52,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-11-25 08:54:52,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 42 transitions. [2019-11-25 08:54:52,054 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 42 transitions. Word has length 22 [2019-11-25 08:54:52,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:54:52,055 INFO L462 AbstractCegarLoop]: Abstraction has 33 states and 42 transitions. [2019-11-25 08:54:52,055 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-25 08:54:52,056 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 42 transitions. [2019-11-25 08:54:52,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-11-25 08:54:52,058 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:54:52,059 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 08:54:52,263 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:54:52,264 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-25 08:54:52,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:54:52,264 INFO L82 PathProgramCache]: Analyzing trace with hash 1285987244, now seen corresponding path program 1 times [2019-11-25 08:54:52,265 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:54:52,265 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945932836] [2019-11-25 08:54:52,265 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:54:52,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:54:52,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:54:52,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:54:52,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:54:52,394 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 08:54:52,394 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945932836] [2019-11-25 08:54:52,395 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [531259950] [2019-11-25 08:54:52,395 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_13a90392-cf0f-4915-b2b2-c11d6738ecd6/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 08:54:52,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:54:52,445 INFO L255 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-25 08:54:52,447 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:54:52,484 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 08:54:52,485 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-25 08:54:52,485 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2019-11-25 08:54:52,485 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447686431] [2019-11-25 08:54:52,486 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-25 08:54:52,486 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-25 08:54:52,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-25 08:54:52,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2019-11-25 08:54:52,486 INFO L87 Difference]: Start difference. First operand 33 states and 42 transitions. Second operand 10 states. [2019-11-25 08:54:52,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:54:52,731 INFO L93 Difference]: Finished difference Result 55 states and 78 transitions. [2019-11-25 08:54:52,732 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-25 08:54:52,732 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 23 [2019-11-25 08:54:52,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:54:52,735 INFO L225 Difference]: With dead ends: 55 [2019-11-25 08:54:52,735 INFO L226 Difference]: Without dead ends: 51 [2019-11-25 08:54:52,736 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 08:54:52,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2019-11-25 08:54:52,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 48. [2019-11-25 08:54:52,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2019-11-25 08:54:52,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 68 transitions. [2019-11-25 08:54:52,756 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 68 transitions. Word has length 23 [2019-11-25 08:54:52,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:54:52,756 INFO L462 AbstractCegarLoop]: Abstraction has 48 states and 68 transitions. [2019-11-25 08:54:52,757 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-25 08:54:52,757 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 68 transitions. [2019-11-25 08:54:52,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2019-11-25 08:54:52,759 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:54:52,759 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 08:54:52,960 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:54:52,961 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-25 08:54:52,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:54:52,961 INFO L82 PathProgramCache]: Analyzing trace with hash -649262923, now seen corresponding path program 1 times [2019-11-25 08:54:52,961 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:54:52,962 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631156238] [2019-11-25 08:54:52,962 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:54:52,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:54:53,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:54:53,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:54:53,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:54:53,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:54:53,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:54:53,100 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 08:54:53,101 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631156238] [2019-11-25 08:54:53,101 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [260084159] [2019-11-25 08:54:53,101 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_13a90392-cf0f-4915-b2b2-c11d6738ecd6/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 08:54:53,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:54:53,160 INFO L255 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-25 08:54:53,162 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:54:53,219 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 08:54:53,220 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-25 08:54:53,220 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2019-11-25 08:54:53,220 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22179682] [2019-11-25 08:54:53,221 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-25 08:54:53,221 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-25 08:54:53,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-25 08:54:53,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2019-11-25 08:54:53,222 INFO L87 Difference]: Start difference. First operand 48 states and 68 transitions. Second operand 12 states. [2019-11-25 08:54:53,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:54:53,579 INFO L93 Difference]: Finished difference Result 114 states and 187 transitions. [2019-11-25 08:54:53,580 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-11-25 08:54:53,580 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 35 [2019-11-25 08:54:53,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:54:53,583 INFO L225 Difference]: With dead ends: 114 [2019-11-25 08:54:53,583 INFO L226 Difference]: Without dead ends: 68 [2019-11-25 08:54:53,585 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 08:54:53,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2019-11-25 08:54:53,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 66. [2019-11-25 08:54:53,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2019-11-25 08:54:53,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 98 transitions. [2019-11-25 08:54:53,611 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 98 transitions. Word has length 35 [2019-11-25 08:54:53,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:54:53,616 INFO L462 AbstractCegarLoop]: Abstraction has 66 states and 98 transitions. [2019-11-25 08:54:53,616 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-25 08:54:53,616 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 98 transitions. [2019-11-25 08:54:53,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2019-11-25 08:54:53,620 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:54:53,620 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 08:54:53,825 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:54:53,825 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-25 08:54:53,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:54:53,825 INFO L82 PathProgramCache]: Analyzing trace with hash 2000747716, now seen corresponding path program 1 times [2019-11-25 08:54:53,825 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:54:53,826 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682459980] [2019-11-25 08:54:53,826 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:54:53,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:54:53,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:54:53,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:54:53,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:54:53,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:54:53,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:54:53,936 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 08:54:53,937 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682459980] [2019-11-25 08:54:53,937 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1414109860] [2019-11-25 08:54:53,937 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_13a90392-cf0f-4915-b2b2-c11d6738ecd6/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 08:54:53,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:54:53,971 INFO L255 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-25 08:54:53,973 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:54:54,046 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 08:54:54,046 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-25 08:54:54,046 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 12 [2019-11-25 08:54:54,047 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205101842] [2019-11-25 08:54:54,047 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-25 08:54:54,047 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-25 08:54:54,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-25 08:54:54,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2019-11-25 08:54:54,048 INFO L87 Difference]: Start difference. First operand 66 states and 98 transitions. Second operand 12 states. [2019-11-25 08:54:54,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:54:54,356 INFO L93 Difference]: Finished difference Result 147 states and 239 transitions. [2019-11-25 08:54:54,357 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-25 08:54:54,357 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 36 [2019-11-25 08:54:54,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:54:54,360 INFO L225 Difference]: With dead ends: 147 [2019-11-25 08:54:54,360 INFO L226 Difference]: Without dead ends: 83 [2019-11-25 08:54:54,362 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 08:54:54,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2019-11-25 08:54:54,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 66. [2019-11-25 08:54:54,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2019-11-25 08:54:54,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 96 transitions. [2019-11-25 08:54:54,392 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 96 transitions. Word has length 36 [2019-11-25 08:54:54,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:54:54,392 INFO L462 AbstractCegarLoop]: Abstraction has 66 states and 96 transitions. [2019-11-25 08:54:54,392 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-25 08:54:54,393 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 96 transitions. [2019-11-25 08:54:54,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2019-11-25 08:54:54,395 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:54:54,395 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 08:54:54,598 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:54:54,598 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-25 08:54:54,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:54:54,598 INFO L82 PathProgramCache]: Analyzing trace with hash -434541687, now seen corresponding path program 1 times [2019-11-25 08:54:54,599 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:54:54,599 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313194906] [2019-11-25 08:54:54,599 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:54:54,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:54:54,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:54:54,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:54:54,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:54:54,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:54:54,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:54:54,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:54:54,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:54:54,809 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 08:54:54,809 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313194906] [2019-11-25 08:54:54,809 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1043971266] [2019-11-25 08:54:54,809 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_13a90392-cf0f-4915-b2b2-c11d6738ecd6/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 08:54:54,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:54:54,851 INFO L255 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-25 08:54:54,857 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:54:54,935 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 08:54:54,935 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-25 08:54:54,935 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 16 [2019-11-25 08:54:54,935 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825551781] [2019-11-25 08:54:54,936 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-11-25 08:54:54,936 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-25 08:54:54,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-11-25 08:54:54,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2019-11-25 08:54:54,937 INFO L87 Difference]: Start difference. First operand 66 states and 96 transitions. Second operand 16 states. [2019-11-25 08:54:55,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:54:55,438 INFO L93 Difference]: Finished difference Result 164 states and 279 transitions. [2019-11-25 08:54:55,438 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-11-25 08:54:55,438 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 50 [2019-11-25 08:54:55,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:54:55,441 INFO L225 Difference]: With dead ends: 164 [2019-11-25 08:54:55,441 INFO L226 Difference]: Without dead ends: 100 [2019-11-25 08:54:55,442 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 08:54:55,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2019-11-25 08:54:55,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 89. [2019-11-25 08:54:55,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2019-11-25 08:54:55,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 145 transitions. [2019-11-25 08:54:55,459 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 145 transitions. Word has length 50 [2019-11-25 08:54:55,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:54:55,460 INFO L462 AbstractCegarLoop]: Abstraction has 89 states and 145 transitions. [2019-11-25 08:54:55,460 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-11-25 08:54:55,460 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 145 transitions. [2019-11-25 08:54:55,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2019-11-25 08:54:55,464 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:54:55,465 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 08:54:55,668 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:54:55,669 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-25 08:54:55,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:54:55,669 INFO L82 PathProgramCache]: Analyzing trace with hash -1917551255, now seen corresponding path program 1 times [2019-11-25 08:54:55,669 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:54:55,670 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131889346] [2019-11-25 08:54:55,670 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:54:55,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:54:55,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:54:55,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:54:55,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:54:55,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:54:55,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:54:55,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:54:55,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:54:55,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:54:55,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:54:55,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:54:55,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:54:55,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:54:55,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:54:55,982 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 08:54:55,982 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131889346] [2019-11-25 08:54:55,983 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1706430599] [2019-11-25 08:54:55,983 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_13a90392-cf0f-4915-b2b2-c11d6738ecd6/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 08:54:56,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:54:56,040 INFO L255 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-25 08:54:56,051 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:54:56,178 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 13 proven. 90 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2019-11-25 08:54:56,179 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-25 08:54:56,179 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 18 [2019-11-25 08:54:56,179 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682677874] [2019-11-25 08:54:56,180 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-11-25 08:54:56,180 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-25 08:54:56,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-11-25 08:54:56,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2019-11-25 08:54:56,181 INFO L87 Difference]: Start difference. First operand 89 states and 145 transitions. Second operand 18 states. [2019-11-25 08:54:56,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:54:56,704 INFO L93 Difference]: Finished difference Result 207 states and 388 transitions. [2019-11-25 08:54:56,705 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-11-25 08:54:56,705 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 91 [2019-11-25 08:54:56,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:54:56,708 INFO L225 Difference]: With dead ends: 207 [2019-11-25 08:54:56,708 INFO L226 Difference]: Without dead ends: 114 [2019-11-25 08:54:56,710 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=143, Invalid=669, Unknown=0, NotChecked=0, Total=812 [2019-11-25 08:54:56,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2019-11-25 08:54:56,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 88. [2019-11-25 08:54:56,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2019-11-25 08:54:56,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 135 transitions. [2019-11-25 08:54:56,726 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 135 transitions. Word has length 91 [2019-11-25 08:54:56,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:54:56,726 INFO L462 AbstractCegarLoop]: Abstraction has 88 states and 135 transitions. [2019-11-25 08:54:56,727 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-11-25 08:54:56,727 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 135 transitions. [2019-11-25 08:54:56,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2019-11-25 08:54:56,730 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:54:56,731 INFO L410 BasicCegarLoop]: trace histogram [10, 10, 7, 7, 7, 7, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1] [2019-11-25 08:54:56,934 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:54:56,934 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-25 08:54:56,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:54:56,935 INFO L82 PathProgramCache]: Analyzing trace with hash -463941571, now seen corresponding path program 1 times [2019-11-25 08:54:56,935 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:54:56,935 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048193326] [2019-11-25 08:54:56,935 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:54:56,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:54:56,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:54:57,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:54:57,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:54:57,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:54:57,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:54:57,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:54:57,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:54:57,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:54:57,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:54:57,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:54:57,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:54:57,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:54:57,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:54:57,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:54:57,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:54:57,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:54:57,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:54:57,235 INFO L134 CoverageAnalysis]: Checked inductivity of 358 backedges. 53 proven. 117 refuted. 0 times theorem prover too weak. 188 trivial. 0 not checked. [2019-11-25 08:54:57,235 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048193326] [2019-11-25 08:54:57,235 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [816602044] [2019-11-25 08:54:57,236 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_13a90392-cf0f-4915-b2b2-c11d6738ecd6/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 08:54:57,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:54:57,290 INFO L255 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-25 08:54:57,294 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:54:57,371 INFO L134 CoverageAnalysis]: Checked inductivity of 358 backedges. 48 proven. 89 refuted. 0 times theorem prover too weak. 221 trivial. 0 not checked. [2019-11-25 08:54:57,372 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-25 08:54:57,372 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 9] total 18 [2019-11-25 08:54:57,375 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284304369] [2019-11-25 08:54:57,376 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-11-25 08:54:57,377 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-25 08:54:57,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-11-25 08:54:57,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2019-11-25 08:54:57,378 INFO L87 Difference]: Start difference. First operand 88 states and 135 transitions. Second operand 18 states. [2019-11-25 08:54:57,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:54:57,816 INFO L93 Difference]: Finished difference Result 209 states and 348 transitions. [2019-11-25 08:54:57,816 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-11-25 08:54:57,817 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 119 [2019-11-25 08:54:57,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:54:57,819 INFO L225 Difference]: With dead ends: 209 [2019-11-25 08:54:57,819 INFO L226 Difference]: Without dead ends: 121 [2019-11-25 08:54:57,820 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=117, Invalid=533, Unknown=0, NotChecked=0, Total=650 [2019-11-25 08:54:57,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2019-11-25 08:54:57,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 111. [2019-11-25 08:54:57,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2019-11-25 08:54:57,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 175 transitions. [2019-11-25 08:54:57,857 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 175 transitions. Word has length 119 [2019-11-25 08:54:57,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:54:57,859 INFO L462 AbstractCegarLoop]: Abstraction has 111 states and 175 transitions. [2019-11-25 08:54:57,859 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-11-25 08:54:57,859 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 175 transitions. [2019-11-25 08:54:57,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 269 [2019-11-25 08:54:57,865 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:54:57,866 INFO L410 BasicCegarLoop]: trace histogram [21, 21, 18, 18, 17, 14, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 8, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2019-11-25 08:54:58,069 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:54:58,069 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-25 08:54:58,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:54:58,069 INFO L82 PathProgramCache]: Analyzing trace with hash 1957575691, now seen corresponding path program 2 times [2019-11-25 08:54:58,069 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:54:58,070 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796355578] [2019-11-25 08:54:58,070 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:54:58,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:54:58,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:54:58,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:54:58,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:54:58,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:54:58,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:54:58,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:54:58,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:54:58,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:54:58,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:54:58,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:54:58,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:54:58,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:54:58,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:54:58,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:54:58,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:54:58,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:54:58,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:54:58,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:54:58,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:54:58,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:54:58,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:54:58,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:54:58,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:54:58,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:54:58,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:54:58,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:54:58,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:54:58,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:54:58,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:54:58,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:54:58,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:54:58,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:54:58,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:54:58,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:54:58,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:54:58,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:54:58,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:54:58,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:54:58,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:54:58,957 INFO L134 CoverageAnalysis]: Checked inductivity of 2003 backedges. 467 proven. 589 refuted. 0 times theorem prover too weak. 947 trivial. 0 not checked. [2019-11-25 08:54:58,958 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796355578] [2019-11-25 08:54:58,958 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [896071195] [2019-11-25 08:54:58,958 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_13a90392-cf0f-4915-b2b2-c11d6738ecd6/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 08:54:59,075 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-25 08:54:59,076 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-25 08:54:59,078 INFO L255 TraceCheckSpWp]: Trace formula consists of 597 conjuncts, 13 conjunts are in the unsatisfiable core [2019-11-25 08:54:59,089 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:54:59,261 INFO L134 CoverageAnalysis]: Checked inductivity of 2003 backedges. 174 proven. 310 refuted. 0 times theorem prover too weak. 1519 trivial. 0 not checked. [2019-11-25 08:54:59,262 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-25 08:54:59,262 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 11] total 28 [2019-11-25 08:54:59,262 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530118991] [2019-11-25 08:54:59,263 INFO L442 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-11-25 08:54:59,264 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-25 08:54:59,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-11-25 08:54:59,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=656, Unknown=0, NotChecked=0, Total=756 [2019-11-25 08:54:59,265 INFO L87 Difference]: Start difference. First operand 111 states and 175 transitions. Second operand 28 states. [2019-11-25 08:55:00,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:55:00,289 INFO L93 Difference]: Finished difference Result 310 states and 603 transitions. [2019-11-25 08:55:00,289 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2019-11-25 08:55:00,289 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 268 [2019-11-25 08:55:00,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:55:00,292 INFO L225 Difference]: With dead ends: 310 [2019-11-25 08:55:00,292 INFO L226 Difference]: Without dead ends: 165 [2019-11-25 08:55:00,294 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 393 GetRequests, 354 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 423 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=231, Invalid=1329, Unknown=0, NotChecked=0, Total=1560 [2019-11-25 08:55:00,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2019-11-25 08:55:00,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 112. [2019-11-25 08:55:00,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2019-11-25 08:55:00,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 167 transitions. [2019-11-25 08:55:00,324 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 167 transitions. Word has length 268 [2019-11-25 08:55:00,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:55:00,325 INFO L462 AbstractCegarLoop]: Abstraction has 112 states and 167 transitions. [2019-11-25 08:55:00,326 INFO L463 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-11-25 08:55:00,326 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 167 transitions. [2019-11-25 08:55:00,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2019-11-25 08:55:00,330 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:55:00,330 INFO L410 BasicCegarLoop]: trace histogram [17, 17, 14, 14, 13, 12, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 6, 4, 4, 2, 1, 1, 1, 1, 1, 1] [2019-11-25 08:55:00,534 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:55:00,534 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-25 08:55:00,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:55:00,535 INFO L82 PathProgramCache]: Analyzing trace with hash 1502984625, now seen corresponding path program 3 times [2019-11-25 08:55:00,535 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:55:00,540 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664713970] [2019-11-25 08:55:00,540 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:55:00,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:55:00,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:55:00,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:55:00,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:55:00,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:55:00,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:55:00,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:55:00,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:55:00,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:55:00,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:55:00,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:55:00,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:55:00,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:55:00,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:55:00,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:55:00,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:55:00,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:55:01,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:55:01,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:55:01,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:55:01,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:55:01,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:55:01,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:55:01,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:55:01,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:55:01,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:55:01,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:55:01,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:55:01,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:55:01,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:55:01,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:55:01,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:55:01,263 INFO L134 CoverageAnalysis]: Checked inductivity of 1248 backedges. 289 proven. 362 refuted. 0 times theorem prover too weak. 597 trivial. 0 not checked. [2019-11-25 08:55:01,264 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664713970] [2019-11-25 08:55:01,264 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [861261271] [2019-11-25 08:55:01,264 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_13a90392-cf0f-4915-b2b2-c11d6738ecd6/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 08:55:01,327 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-11-25 08:55:01,327 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-25 08:55:01,328 INFO L255 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 13 conjunts are in the unsatisfiable core [2019-11-25 08:55:01,332 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:55:01,526 INFO L134 CoverageAnalysis]: Checked inductivity of 1248 backedges. 661 proven. 42 refuted. 0 times theorem prover too weak. 545 trivial. 0 not checked. [2019-11-25 08:55:01,526 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-25 08:55:01,527 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 13] total 34 [2019-11-25 08:55:01,527 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458848748] [2019-11-25 08:55:01,528 INFO L442 AbstractCegarLoop]: Interpolant automaton has 34 states [2019-11-25 08:55:01,528 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-25 08:55:01,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2019-11-25 08:55:01,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=980, Unknown=0, NotChecked=0, Total=1122 [2019-11-25 08:55:01,530 INFO L87 Difference]: Start difference. First operand 112 states and 167 transitions. Second operand 34 states. [2019-11-25 08:55:02,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:55:02,287 INFO L93 Difference]: Finished difference Result 240 states and 403 transitions. [2019-11-25 08:55:02,287 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-11-25 08:55:02,287 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 214 [2019-11-25 08:55:02,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:55:02,289 INFO L225 Difference]: With dead ends: 240 [2019-11-25 08:55:02,289 INFO L226 Difference]: Without dead ends: 131 [2019-11-25 08:55:02,291 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 313 GetRequests, 269 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 585 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=268, Invalid=1712, Unknown=0, NotChecked=0, Total=1980 [2019-11-25 08:55:02,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2019-11-25 08:55:02,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 126. [2019-11-25 08:55:02,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2019-11-25 08:55:02,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 166 transitions. [2019-11-25 08:55:02,307 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 166 transitions. Word has length 214 [2019-11-25 08:55:02,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:55:02,308 INFO L462 AbstractCegarLoop]: Abstraction has 126 states and 166 transitions. [2019-11-25 08:55:02,308 INFO L463 AbstractCegarLoop]: Interpolant automaton has 34 states. [2019-11-25 08:55:02,308 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 166 transitions. [2019-11-25 08:55:02,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2019-11-25 08:55:02,311 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:55:02,311 INFO L410 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 10, 9, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2019-11-25 08:55:02,523 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:55:02,523 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-25 08:55:02,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:55:02,524 INFO L82 PathProgramCache]: Analyzing trace with hash 634625338, now seen corresponding path program 4 times [2019-11-25 08:55:02,524 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:55:02,524 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841148343] [2019-11-25 08:55:02,524 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:55:02,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:55:02,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:55:02,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:55:02,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:55:02,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:55:02,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:55:02,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:55:02,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:55:02,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:55:02,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:55:02,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:55:02,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:55:02,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:55:02,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:55:02,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:55:02,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:55:02,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:55:02,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:55:02,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:55:02,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:55:02,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:55:02,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:55:02,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:55:02,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:55:02,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:55:02,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:55:02,730 INFO L134 CoverageAnalysis]: Checked inductivity of 777 backedges. 131 proven. 3 refuted. 0 times theorem prover too weak. 643 trivial. 0 not checked. [2019-11-25 08:55:02,731 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841148343] [2019-11-25 08:55:02,731 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2014254297] [2019-11-25 08:55:02,731 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_13a90392-cf0f-4915-b2b2-c11d6738ecd6/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 08:55:02,797 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-25 08:55:02,798 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-25 08:55:02,798 INFO L255 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-25 08:55:02,801 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:55:02,837 INFO L134 CoverageAnalysis]: Checked inductivity of 777 backedges. 171 proven. 0 refuted. 0 times theorem prover too weak. 606 trivial. 0 not checked. [2019-11-25 08:55:02,837 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-25 08:55:02,838 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 7 [2019-11-25 08:55:02,838 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963211015] [2019-11-25 08:55:02,838 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-25 08:55:02,838 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-25 08:55:02,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-25 08:55:02,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-11-25 08:55:02,839 INFO L87 Difference]: Start difference. First operand 126 states and 166 transitions. Second operand 6 states. [2019-11-25 08:55:02,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:55:02,881 INFO L93 Difference]: Finished difference Result 240 states and 329 transitions. [2019-11-25 08:55:02,885 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-25 08:55:02,885 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 172 [2019-11-25 08:55:02,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:55:02,887 INFO L225 Difference]: With dead ends: 240 [2019-11-25 08:55:02,887 INFO L226 Difference]: Without dead ends: 116 [2019-11-25 08:55:02,888 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 223 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 08:55:02,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2019-11-25 08:55:02,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 116. [2019-11-25 08:55:02,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2019-11-25 08:55:02,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 148 transitions. [2019-11-25 08:55:02,901 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 148 transitions. Word has length 172 [2019-11-25 08:55:02,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:55:02,906 INFO L462 AbstractCegarLoop]: Abstraction has 116 states and 148 transitions. [2019-11-25 08:55:02,906 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-25 08:55:02,906 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 148 transitions. [2019-11-25 08:55:02,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2019-11-25 08:55:02,908 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:55:02,909 INFO L410 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 9, 8, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1] [2019-11-25 08:55:03,112 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:55:03,112 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-25 08:55:03,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:55:03,113 INFO L82 PathProgramCache]: Analyzing trace with hash 1745059098, now seen corresponding path program 5 times [2019-11-25 08:55:03,113 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:55:03,113 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585044298] [2019-11-25 08:55:03,113 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:55:03,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:55:03,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:55:03,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:55:03,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:55:03,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:55:03,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:55:03,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:55:03,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:55:03,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:55:03,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:55:03,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:55:03,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:55:03,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:55:03,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:55:03,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:55:03,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:55:03,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:55:03,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:55:03,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:55:03,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:55:03,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:55:03,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:55:03,587 INFO L134 CoverageAnalysis]: Checked inductivity of 544 backedges. 145 proven. 138 refuted. 0 times theorem prover too weak. 261 trivial. 0 not checked. [2019-11-25 08:55:03,587 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585044298] [2019-11-25 08:55:03,587 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [624207961] [2019-11-25 08:55:03,587 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_13a90392-cf0f-4915-b2b2-c11d6738ecd6/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 08:55:03,658 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2019-11-25 08:55:03,659 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-25 08:55:03,660 INFO L255 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 16 conjunts are in the unsatisfiable core [2019-11-25 08:55:03,662 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:55:03,787 INFO L134 CoverageAnalysis]: Checked inductivity of 544 backedges. 150 proven. 142 refuted. 0 times theorem prover too weak. 252 trivial. 0 not checked. [2019-11-25 08:55:03,787 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-25 08:55:03,788 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 14] total 25 [2019-11-25 08:55:03,788 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033725806] [2019-11-25 08:55:03,789 INFO L442 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-11-25 08:55:03,789 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-25 08:55:03,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-11-25 08:55:03,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=508, Unknown=0, NotChecked=0, Total=600 [2019-11-25 08:55:03,790 INFO L87 Difference]: Start difference. First operand 116 states and 148 transitions. Second operand 25 states. [2019-11-25 08:55:04,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:55:04,315 INFO L93 Difference]: Finished difference Result 244 states and 330 transitions. [2019-11-25 08:55:04,316 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-11-25 08:55:04,316 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 146 [2019-11-25 08:55:04,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:55:04,317 INFO L225 Difference]: With dead ends: 244 [2019-11-25 08:55:04,317 INFO L226 Difference]: Without dead ends: 130 [2019-11-25 08:55:04,318 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=148, Invalid=782, Unknown=0, NotChecked=0, Total=930 [2019-11-25 08:55:04,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2019-11-25 08:55:04,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 126. [2019-11-25 08:55:04,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2019-11-25 08:55:04,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 160 transitions. [2019-11-25 08:55:04,327 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 160 transitions. Word has length 146 [2019-11-25 08:55:04,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:55:04,327 INFO L462 AbstractCegarLoop]: Abstraction has 126 states and 160 transitions. [2019-11-25 08:55:04,327 INFO L463 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-11-25 08:55:04,327 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 160 transitions. [2019-11-25 08:55:04,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2019-11-25 08:55:04,330 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:55:04,331 INFO L410 BasicCegarLoop]: trace histogram [17, 17, 14, 14, 13, 12, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 6, 4, 4, 2, 1, 1, 1, 1, 1, 1] [2019-11-25 08:55:04,542 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:55:04,542 INFO L410 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-25 08:55:04,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:55:04,542 INFO L82 PathProgramCache]: Analyzing trace with hash 245292255, now seen corresponding path program 6 times [2019-11-25 08:55:04,542 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:55:04,543 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376669153] [2019-11-25 08:55:04,543 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:55:04,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:55:04,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:55:04,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:55:04,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:55:04,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:55:04,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:55:04,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:55:04,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:55:04,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:55:04,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:55:04,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:55:04,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:55:04,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:55:04,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:55:04,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:55:04,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:55:04,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:55:04,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:55:04,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:55:04,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:55:04,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:55:05,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:55:05,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:55:05,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:55:05,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:55:05,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:55:05,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:55:05,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:55:05,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:55:05,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:55:05,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:55:05,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:55:05,160 INFO L134 CoverageAnalysis]: Checked inductivity of 1248 backedges. 210 proven. 368 refuted. 0 times theorem prover too weak. 670 trivial. 0 not checked. [2019-11-25 08:55:05,161 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376669153] [2019-11-25 08:55:05,161 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1787457402] [2019-11-25 08:55:05,161 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_13a90392-cf0f-4915-b2b2-c11d6738ecd6/bin/uautomizer/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:55:05,274 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2019-11-25 08:55:05,274 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-25 08:55:05,276 INFO L255 TraceCheckSpWp]: Trace formula consists of 402 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-25 08:55:05,279 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:55:05,408 INFO L134 CoverageAnalysis]: Checked inductivity of 1248 backedges. 294 proven. 58 refuted. 0 times theorem prover too weak. 896 trivial. 0 not checked. [2019-11-25 08:55:05,408 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-25 08:55:05,409 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 10] total 30 [2019-11-25 08:55:05,409 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501719924] [2019-11-25 08:55:05,409 INFO L442 AbstractCegarLoop]: Interpolant automaton has 30 states [2019-11-25 08:55:05,409 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-25 08:55:05,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2019-11-25 08:55:05,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=750, Unknown=0, NotChecked=0, Total=870 [2019-11-25 08:55:05,410 INFO L87 Difference]: Start difference. First operand 126 states and 160 transitions. Second operand 30 states. [2019-11-25 08:55:06,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:55:06,308 INFO L93 Difference]: Finished difference Result 281 states and 406 transitions. [2019-11-25 08:55:06,308 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2019-11-25 08:55:06,308 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 214 [2019-11-25 08:55:06,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:55:06,310 INFO L225 Difference]: With dead ends: 281 [2019-11-25 08:55:06,310 INFO L226 Difference]: Without dead ends: 160 [2019-11-25 08:55:06,312 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 318 GetRequests, 269 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 726 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=358, Invalid=2192, Unknown=0, NotChecked=0, Total=2550 [2019-11-25 08:55:06,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2019-11-25 08:55:06,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 143. [2019-11-25 08:55:06,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2019-11-25 08:55:06,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 184 transitions. [2019-11-25 08:55:06,323 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 184 transitions. Word has length 214 [2019-11-25 08:55:06,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:55:06,323 INFO L462 AbstractCegarLoop]: Abstraction has 143 states and 184 transitions. [2019-11-25 08:55:06,323 INFO L463 AbstractCegarLoop]: Interpolant automaton has 30 states. [2019-11-25 08:55:06,323 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 184 transitions. [2019-11-25 08:55:06,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2019-11-25 08:55:06,325 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:55:06,325 INFO L410 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 10, 10, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1] [2019-11-25 08:55:06,528 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:55:06,528 INFO L410 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-25 08:55:06,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:55:06,529 INFO L82 PathProgramCache]: Analyzing trace with hash 1112792143, now seen corresponding path program 7 times [2019-11-25 08:55:06,529 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:55:06,529 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841054489] [2019-11-25 08:55:06,529 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:55:06,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:55:06,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:55:06,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:55:06,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:55:06,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:55:06,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:55:07,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:55:07,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:55:07,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:55:07,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:55:07,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:55:07,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:55:07,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:55:07,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:55:07,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:55:07,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:55:07,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:55:07,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:55:07,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:55:07,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:55:07,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:55:07,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:55:07,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:55:07,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:55:07,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:55:07,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:55:07,585 INFO L134 CoverageAnalysis]: Checked inductivity of 786 backedges. 0 proven. 267 refuted. 0 times theorem prover too weak. 519 trivial. 0 not checked. [2019-11-25 08:55:07,586 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841054489] [2019-11-25 08:55:07,586 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1683822908] [2019-11-25 08:55:07,586 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_13a90392-cf0f-4915-b2b2-c11d6738ecd6/bin/uautomizer/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:55:07,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:55:07,688 INFO L255 TraceCheckSpWp]: Trace formula consists of 386 conjuncts, 103 conjunts are in the unsatisfiable core [2019-11-25 08:55:07,691 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:55:08,534 INFO L134 CoverageAnalysis]: Checked inductivity of 786 backedges. 0 proven. 267 refuted. 0 times theorem prover too weak. 519 trivial. 0 not checked. [2019-11-25 08:55:08,535 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-25 08:55:08,535 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 36 [2019-11-25 08:55:08,536 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223419017] [2019-11-25 08:55:08,537 INFO L442 AbstractCegarLoop]: Interpolant automaton has 36 states [2019-11-25 08:55:08,538 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-25 08:55:08,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2019-11-25 08:55:08,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=1175, Unknown=0, NotChecked=0, Total=1260 [2019-11-25 08:55:08,539 INFO L87 Difference]: Start difference. First operand 143 states and 184 transitions. Second operand 36 states. [2019-11-25 08:55:08,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:55:08,966 INFO L93 Difference]: Finished difference Result 150 states and 193 transitions. [2019-11-25 08:55:08,966 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-11-25 08:55:08,966 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 173 [2019-11-25 08:55:08,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:55:08,968 INFO L225 Difference]: With dead ends: 150 [2019-11-25 08:55:08,968 INFO L226 Difference]: Without dead ends: 146 [2019-11-25 08:55:08,969 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 227 SyntacticMatches, 14 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=85, Invalid=1175, Unknown=0, NotChecked=0, Total=1260 [2019-11-25 08:55:08,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2019-11-25 08:55:08,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 143. [2019-11-25 08:55:08,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2019-11-25 08:55:08,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 182 transitions. [2019-11-25 08:55:08,981 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 182 transitions. Word has length 173 [2019-11-25 08:55:08,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:55:08,982 INFO L462 AbstractCegarLoop]: Abstraction has 143 states and 182 transitions. [2019-11-25 08:55:08,982 INFO L463 AbstractCegarLoop]: Interpolant automaton has 36 states. [2019-11-25 08:55:08,982 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 182 transitions. [2019-11-25 08:55:08,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2019-11-25 08:55:08,984 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:55:08,984 INFO L410 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 13, 12, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 6, 4, 3, 3, 1, 1, 1, 1, 1, 1] [2019-11-25 08:55:09,196 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:55:09,197 INFO L410 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-25 08:55:09,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:55:09,197 INFO L82 PathProgramCache]: Analyzing trace with hash -1640173863, now seen corresponding path program 8 times [2019-11-25 08:55:09,198 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:55:09,198 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547786399] [2019-11-25 08:55:09,198 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:55:09,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:55:09,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:55:09,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:55:09,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:55:09,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:55:09,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:55:09,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:55:09,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:55:09,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:55:09,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:55:09,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:55:09,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:55:09,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:55:09,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:55:09,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:55:09,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:55:09,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:55:09,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:55:09,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:55:09,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:55:09,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:55:09,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:55:09,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:55:09,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:55:09,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:55:09,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:55:09,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:55:09,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:55:09,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:55:09,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:55:09,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:55:09,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:55:09,741 INFO L134 CoverageAnalysis]: Checked inductivity of 1240 backedges. 201 proven. 323 refuted. 0 times theorem prover too weak. 716 trivial. 0 not checked. [2019-11-25 08:55:09,742 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547786399] [2019-11-25 08:55:09,742 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1063928646] [2019-11-25 08:55:09,742 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_13a90392-cf0f-4915-b2b2-c11d6738ecd6/bin/uautomizer/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:55:09,827 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-25 08:55:09,828 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-25 08:55:09,829 INFO L255 TraceCheckSpWp]: Trace formula consists of 477 conjuncts, 15 conjunts are in the unsatisfiable core [2019-11-25 08:55:09,834 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:55:10,012 INFO L134 CoverageAnalysis]: Checked inductivity of 1240 backedges. 111 proven. 313 refuted. 0 times theorem prover too weak. 816 trivial. 0 not checked. [2019-11-25 08:55:10,013 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-25 08:55:10,013 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 12] total 25 [2019-11-25 08:55:10,013 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151514901] [2019-11-25 08:55:10,014 INFO L442 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-11-25 08:55:10,014 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-25 08:55:10,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-11-25 08:55:10,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=514, Unknown=0, NotChecked=0, Total=600 [2019-11-25 08:55:10,015 INFO L87 Difference]: Start difference. First operand 143 states and 182 transitions. Second operand 25 states. [2019-11-25 08:55:10,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:55:10,426 INFO L93 Difference]: Finished difference Result 263 states and 336 transitions. [2019-11-25 08:55:10,426 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-11-25 08:55:10,426 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 214 [2019-11-25 08:55:10,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:55:10,427 INFO L225 Difference]: With dead ends: 263 [2019-11-25 08:55:10,427 INFO L226 Difference]: Without dead ends: 0 [2019-11-25 08:55:10,428 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 299 GetRequests, 270 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=132, Invalid=738, Unknown=0, NotChecked=0, Total=870 [2019-11-25 08:55:10,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-11-25 08:55:10,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-11-25 08:55:10,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-11-25 08:55:10,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-11-25 08:55:10,430 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 214 [2019-11-25 08:55:10,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:55:10,430 INFO L462 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-11-25 08:55:10,430 INFO L463 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-11-25 08:55:10,430 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-11-25 08:55:10,430 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-11-25 08:55:10,634 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:55:10,638 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2019-11-25 08:55:11,315 WARN L192 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 7 [2019-11-25 08:55:11,887 WARN L192 SmtUtils]: Spent 464.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 30 [2019-11-25 08:55:12,320 WARN L192 SmtUtils]: Spent 331.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 25 [2019-11-25 08:55:12,323 INFO L444 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2019-11-25 08:55:12,323 INFO L444 ceAbstractionStarter]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2019-11-25 08:55:12,323 INFO L444 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2019-11-25 08:55:12,323 INFO L444 ceAbstractionStarter]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 39) no Hoare annotation was computed. [2019-11-25 08:55:12,323 INFO L440 ceAbstractionStarter]: At program point L41(lines 35 42) the Hoare annotation is: (<= 6 ULTIMATE.start_main_~x~0) [2019-11-25 08:55:12,323 INFO L444 ceAbstractionStarter]: For program point L39(line 39) no Hoare annotation was computed. [2019-11-25 08:55:12,323 INFO L444 ceAbstractionStarter]: For program point L38(lines 38 40) no Hoare annotation was computed. [2019-11-25 08:55:12,323 INFO L440 ceAbstractionStarter]: At program point L37(line 37) the Hoare annotation is: (and (<= 6 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~x~0 6)) [2019-11-25 08:55:12,324 INFO L444 ceAbstractionStarter]: For program point L37-1(line 37) no Hoare annotation was computed. [2019-11-25 08:55:12,324 INFO L444 ceAbstractionStarter]: For program point L38-2(lines 38 40) no Hoare annotation was computed. [2019-11-25 08:55:12,324 INFO L447 ceAbstractionStarter]: At program point fibo2ENTRY(lines 17 25) the Hoare annotation is: true [2019-11-25 08:55:12,324 INFO L440 ceAbstractionStarter]: At program point L23(line 23) the Hoare annotation is: (and (not (<= |fibo2_#in~n| 1)) (= fibo2_~n |fibo2_#in~n|)) [2019-11-25 08:55:12,324 INFO L444 ceAbstractionStarter]: For program point L23-1(line 23) no Hoare annotation was computed. [2019-11-25 08:55:12,324 INFO L440 ceAbstractionStarter]: At program point L23-2(line 23) the Hoare annotation is: (let ((.cse0 (and (<= fibo2_~n 2) (<= 1 |fibo2_#t~ret2|) (<= |fibo2_#t~ret2| 1) (<= 2 |fibo2_#in~n|)))) (and (or .cse0 (not (<= |fibo2_#in~n| 3))) (or (<= |fibo2_#in~n| 4) (<= 6 |fibo2_#in~n|) (and (<= 3 |fibo2_#t~ret2|) (<= |fibo2_#t~ret2| 3))) (= fibo2_~n |fibo2_#in~n|) (or .cse0 (<= 5 fibo2_~n) (and (<= |fibo2_#t~ret2| 2) (<= 2 |fibo2_#t~ret2|))))) [2019-11-25 08:55:12,324 INFO L444 ceAbstractionStarter]: For program point L20(lines 20 24) no Hoare annotation was computed. [2019-11-25 08:55:12,324 INFO L444 ceAbstractionStarter]: For program point L23-3(line 23) no Hoare annotation was computed. [2019-11-25 08:55:12,324 INFO L444 ceAbstractionStarter]: For program point L18(lines 18 24) no Hoare annotation was computed. [2019-11-25 08:55:12,324 INFO L444 ceAbstractionStarter]: For program point fibo2FINAL(lines 17 25) no Hoare annotation was computed. [2019-11-25 08:55:12,324 INFO L444 ceAbstractionStarter]: For program point fibo2EXIT(lines 17 25) no Hoare annotation was computed. [2019-11-25 08:55:12,325 INFO L447 ceAbstractionStarter]: At program point fibo1ENTRY(lines 7 15) the Hoare annotation is: true [2019-11-25 08:55:12,325 INFO L440 ceAbstractionStarter]: At program point L13(line 13) the Hoare annotation is: (and (< 1 fibo1_~n) (= fibo1_~n |fibo1_#in~n|)) [2019-11-25 08:55:12,325 INFO L444 ceAbstractionStarter]: For program point L13-1(line 13) no Hoare annotation was computed. [2019-11-25 08:55:12,325 INFO L440 ceAbstractionStarter]: At program point L13-2(line 13) the Hoare annotation is: (and (not (<= |fibo1_#in~n| 1)) (or (and (<= 1 |fibo1_#t~ret0|) (<= |fibo1_#in~n| 3) (<= |fibo1_#t~ret0| 1)) (not (<= |fibo1_#in~n| 4))) (or (<= |fibo1_#in~n| 5) (<= 7 |fibo1_#in~n|) (and (<= |fibo1_#t~ret0| 5) (<= 5 |fibo1_#t~ret0|))) (= fibo1_~n |fibo1_#in~n|)) [2019-11-25 08:55:12,325 INFO L444 ceAbstractionStarter]: For program point fibo1FINAL(lines 7 15) no Hoare annotation was computed. [2019-11-25 08:55:12,325 INFO L444 ceAbstractionStarter]: For program point L10(lines 10 14) no Hoare annotation was computed. [2019-11-25 08:55:12,325 INFO L444 ceAbstractionStarter]: For program point L13-3(line 13) no Hoare annotation was computed. [2019-11-25 08:55:12,325 INFO L444 ceAbstractionStarter]: For program point L8(lines 8 14) no Hoare annotation was computed. [2019-11-25 08:55:12,325 INFO L444 ceAbstractionStarter]: For program point fibo1EXIT(lines 7 15) no Hoare annotation was computed. [2019-11-25 08:55:12,335 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.11 08:55:12 BoogieIcfgContainer [2019-11-25 08:55:12,335 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-25 08:55:12,335 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-25 08:55:12,336 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-25 08:55:12,336 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-25 08:55:12,336 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:54:51" (3/4) ... [2019-11-25 08:55:12,340 INFO L137 WitnessPrinter]: Generating witness for correct program [2019-11-25 08:55:12,346 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure fibo2 [2019-11-25 08:55:12,346 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure fibo1 [2019-11-25 08:55:12,350 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2019-11-25 08:55:12,351 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2019-11-25 08:55:12,393 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_13a90392-cf0f-4915-b2b2-c11d6738ecd6/bin/uautomizer/witness.graphml [2019-11-25 08:55:12,394 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-25 08:55:12,395 INFO L168 Benchmark]: Toolchain (without parser) took 21978.85 ms. Allocated memory was 1.0 GB in the beginning and 1.5 GB in the end (delta: 461.4 MB). Free memory was 944.7 MB in the beginning and 964.0 MB in the end (delta: -19.3 MB). Peak memory consumption was 442.1 MB. Max. memory is 11.5 GB. [2019-11-25 08:55:12,405 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 1.0 GB. Free memory is still 962.2 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-25 08:55:12,406 INFO L168 Benchmark]: CACSL2BoogieTranslator took 274.39 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 144.2 MB). Free memory was 944.7 MB in the beginning and 1.1 GB in the end (delta: -197.0 MB). Peak memory consumption was 23.1 MB. Max. memory is 11.5 GB. [2019-11-25 08:55:12,406 INFO L168 Benchmark]: Boogie Procedure Inliner took 27.71 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 08:55:12,406 INFO L168 Benchmark]: Boogie Preprocessor took 16.56 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: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. [2019-11-25 08:55:12,406 INFO L168 Benchmark]: RCFGBuilder took 295.95 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: 18.4 MB). Peak memory consumption was 18.4 MB. Max. memory is 11.5 GB. [2019-11-25 08:55:12,407 INFO L168 Benchmark]: TraceAbstraction took 21301.35 ms. Allocated memory was 1.2 GB in the beginning and 1.5 GB in the end (delta: 317.2 MB). Free memory was 1.1 GB in the beginning and 968.0 MB in the end (delta: 152.6 MB). Peak memory consumption was 469.8 MB. Max. memory is 11.5 GB. [2019-11-25 08:55:12,407 INFO L168 Benchmark]: Witness Printer took 58.36 ms. Allocated memory is still 1.5 GB. Free memory was 968.0 MB in the beginning and 964.0 MB in the end (delta: 4.0 MB). Peak memory consumption was 4.0 MB. Max. memory is 11.5 GB. [2019-11-25 08:55:12,408 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 1.0 GB. Free memory is still 962.2 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 274.39 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 144.2 MB). Free memory was 944.7 MB in the beginning and 1.1 GB in the end (delta: -197.0 MB). Peak memory consumption was 23.1 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 27.71 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 16.56 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: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. * RCFGBuilder took 295.95 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: 18.4 MB). Peak memory consumption was 18.4 MB. Max. memory is 11.5 GB. * TraceAbstraction took 21301.35 ms. Allocated memory was 1.2 GB in the beginning and 1.5 GB in the end (delta: 317.2 MB). Free memory was 1.1 GB in the beginning and 968.0 MB in the end (delta: 152.6 MB). Peak memory consumption was 469.8 MB. Max. memory is 11.5 GB. * Witness Printer took 58.36 ms. Allocated memory is still 1.5 GB. Free memory was 968.0 MB in the beginning and 964.0 MB in the end (delta: 4.0 MB). Peak memory consumption was 4.0 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: 6 <= x - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 28 locations, 1 error locations. Result: SAFE, OverallTime: 21.2s, OverallIterations: 16, TraceHistogramMax: 21, AutomataDifference: 6.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 1.6s, HoareTripleCheckerStatistics: 485 SDtfs, 848 SDslu, 4710 SDs, 0 SdLazy, 6601 SolverSat, 873 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 4.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2648 GetRequests, 2269 SyntacticMatches, 19 SemanticMatches, 360 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2714 ImplicationChecksByTransitivity, 5.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=143occurred in iteration=14, 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, 16 MinimizatonAttempts, 155 StatesRemovedByMinimization, 13 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 701 PreInvPairs, 1173 NumberOfFragments, 124 HoareAnnotationTreeSize, 701 FomulaSimplifications, 9137 FormulaSimplificationTreeSizeReduction, 0.5s HoareSimplificationTime, 8 FomulaSimplificationsInter, 7447 FormulaSimplificationTreeSizeReductionInter, 1.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 7.6s InterpolantComputationTime, 3573 NumberOfCodeBlocks, 3402 NumberOfCodeBlocksAsserted, 56 NumberOfCheckSat, 3543 ConstructedInterpolants, 0 QuantifiedInterpolants, 1219797 SizeOfPredicates, 66 NumberOfNonLiveVariables, 3572 ConjunctsInSsa, 237 ConjunctsInUnsatCore, 30 InterpolantComputations, 3 PerfectInterpolantSequences, 13345/16956 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...