./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive-simple/fibo_2calls_5-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 678e0110 Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_62d07144-1b50-4f11-8d03-3c6aef3fb85d/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_62d07144-1b50-4f11-8d03-3c6aef3fb85d/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_62d07144-1b50-4f11-8d03-3c6aef3fb85d/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_62d07144-1b50-4f11-8d03-3c6aef3fb85d/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive-simple/fibo_2calls_5-1.c -s /tmp/vcloud-vcloud-master/worker/run_dir_62d07144-1b50-4f11-8d03-3c6aef3fb85d/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_62d07144-1b50-4f11-8d03-3c6aef3fb85d/bin/uautomizer --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash e6092b6e2bef07c2401a6d2b7c5ee309bc5dbc34 ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.24-678e011 [2019-11-20 04:18:24,922 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-20 04:18:24,924 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-20 04:18:24,939 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-20 04:18:24,942 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-20 04:18:24,944 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-20 04:18:24,946 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-20 04:18:24,957 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-20 04:18:24,959 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-20 04:18:24,963 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-20 04:18:24,964 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-20 04:18:24,966 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-20 04:18:24,967 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-20 04:18:24,971 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-20 04:18:24,972 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-20 04:18:24,974 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-20 04:18:24,975 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-20 04:18:24,979 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-20 04:18:24,982 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-20 04:18:24,987 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-20 04:18:24,992 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-20 04:18:24,995 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-20 04:18:24,998 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-20 04:18:24,999 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-20 04:18:25,003 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-20 04:18:25,004 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-20 04:18:25,004 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-20 04:18:25,006 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-20 04:18:25,007 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-20 04:18:25,008 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-20 04:18:25,008 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-20 04:18:25,009 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-20 04:18:25,010 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-20 04:18:25,011 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-20 04:18:25,012 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-20 04:18:25,013 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-20 04:18:25,014 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-20 04:18:25,014 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-20 04:18:25,014 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-20 04:18:25,015 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-20 04:18:25,017 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-20 04:18:25,018 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_62d07144-1b50-4f11-8d03-3c6aef3fb85d/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-20 04:18:25,052 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-20 04:18:25,054 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-20 04:18:25,056 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-20 04:18:25,056 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-20 04:18:25,057 INFO L138 SettingsManager]: * Use SBE=true [2019-11-20 04:18:25,057 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-20 04:18:25,057 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-20 04:18:25,057 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-20 04:18:25,058 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-20 04:18:25,058 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-20 04:18:25,059 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-20 04:18:25,059 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-20 04:18:25,060 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-20 04:18:25,060 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-20 04:18:25,060 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-20 04:18:25,061 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-20 04:18:25,061 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-20 04:18:25,061 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-20 04:18:25,061 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-20 04:18:25,062 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-20 04:18:25,062 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-20 04:18:25,062 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-20 04:18:25,063 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-20 04:18:25,063 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-20 04:18:25,063 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-20 04:18:25,063 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-20 04:18:25,064 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-20 04:18:25,064 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-20 04:18:25,064 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_62d07144-1b50-4f11-8d03-3c6aef3fb85d/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e6092b6e2bef07c2401a6d2b7c5ee309bc5dbc34 [2019-11-20 04:18:25,234 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-20 04:18:25,247 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-20 04:18:25,250 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-20 04:18:25,252 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-20 04:18:25,252 INFO L275 PluginConnector]: CDTParser initialized [2019-11-20 04:18:25,253 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_62d07144-1b50-4f11-8d03-3c6aef3fb85d/bin/uautomizer/../../sv-benchmarks/c/recursive-simple/fibo_2calls_5-1.c [2019-11-20 04:18:25,331 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_62d07144-1b50-4f11-8d03-3c6aef3fb85d/bin/uautomizer/data/9d9bc1b3b/cccb1cbc802345e7a1d1eda93b5221d1/FLAG4cdb6140f [2019-11-20 04:18:25,757 INFO L306 CDTParser]: Found 1 translation units. [2019-11-20 04:18:25,758 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_62d07144-1b50-4f11-8d03-3c6aef3fb85d/sv-benchmarks/c/recursive-simple/fibo_2calls_5-1.c [2019-11-20 04:18:25,770 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_62d07144-1b50-4f11-8d03-3c6aef3fb85d/bin/uautomizer/data/9d9bc1b3b/cccb1cbc802345e7a1d1eda93b5221d1/FLAG4cdb6140f [2019-11-20 04:18:26,100 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_62d07144-1b50-4f11-8d03-3c6aef3fb85d/bin/uautomizer/data/9d9bc1b3b/cccb1cbc802345e7a1d1eda93b5221d1 [2019-11-20 04:18:26,104 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-20 04:18:26,106 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-20 04:18:26,107 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-20 04:18:26,107 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-20 04:18:26,112 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-20 04:18:26,113 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 04:18:26" (1/1) ... [2019-11-20 04:18:26,116 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@54d55c6b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 04:18:26, skipping insertion in model container [2019-11-20 04:18:26,116 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 04:18:26" (1/1) ... [2019-11-20 04:18:26,125 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-20 04:18:26,144 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-20 04:18:26,399 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-20 04:18:26,407 INFO L188 MainTranslator]: Completed pre-run [2019-11-20 04:18:26,536 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-20 04:18:26,555 INFO L192 MainTranslator]: Completed translation [2019-11-20 04:18:26,556 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 04:18:26 WrapperNode [2019-11-20 04:18:26,557 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-20 04:18:26,558 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-20 04:18:26,558 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-20 04:18:26,559 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-20 04:18:26,569 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 04:18:26" (1/1) ... [2019-11-20 04:18:26,576 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 04:18:26" (1/1) ... [2019-11-20 04:18:26,599 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-20 04:18:26,601 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-20 04:18:26,601 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-20 04:18:26,602 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-20 04:18:26,613 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 04:18:26" (1/1) ... [2019-11-20 04:18:26,613 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 04:18:26" (1/1) ... [2019-11-20 04:18:26,615 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 04:18:26" (1/1) ... [2019-11-20 04:18:26,615 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 04:18:26" (1/1) ... [2019-11-20 04:18:26,618 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 04:18:26" (1/1) ... [2019-11-20 04:18:26,620 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 04:18:26" (1/1) ... [2019-11-20 04:18:26,621 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 04:18:26" (1/1) ... [2019-11-20 04:18:26,623 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-20 04:18:26,634 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-20 04:18:26,634 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-20 04:18:26,634 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-20 04:18:26,636 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 04:18:26" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_62d07144-1b50-4f11-8d03-3c6aef3fb85d/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 [2019-11-20 04:18:26,696 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-20 04:18:26,696 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-20 04:18:26,696 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2019-11-20 04:18:26,697 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2019-11-20 04:18:26,697 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2019-11-20 04:18:26,698 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2019-11-20 04:18:26,911 INFO L280 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-20 04:18:26,912 INFO L285 CfgBuilder]: Removed 4 assume(true) statements. [2019-11-20 04:18:26,913 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 04:18:26 BoogieIcfgContainer [2019-11-20 04:18:26,913 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-20 04:18:26,927 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-20 04:18:26,927 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-20 04:18:26,930 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-20 04:18:26,931 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 04:18:26" (1/3) ... [2019-11-20 04:18:26,937 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9c9d55c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 04:18:26, skipping insertion in model container [2019-11-20 04:18:26,937 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 04:18:26" (2/3) ... [2019-11-20 04:18:26,938 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9c9d55c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 04:18:26, skipping insertion in model container [2019-11-20 04:18:26,938 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 04:18:26" (3/3) ... [2019-11-20 04:18:26,940 INFO L109 eAbstractionObserver]: Analyzing ICFG fibo_2calls_5-1.c [2019-11-20 04:18:26,951 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-20 04:18:26,972 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-20 04:18:27,005 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-20 04:18:27,039 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-20 04:18:27,039 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-20 04:18:27,039 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-20 04:18:27,039 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-20 04:18:27,040 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-20 04:18:27,040 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-20 04:18:27,040 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-20 04:18:27,040 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-20 04:18:27,058 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states. [2019-11-20 04:18:27,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-11-20 04:18:27,065 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 04:18:27,065 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 04:18:27,066 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 04:18:27,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 04:18:27,072 INFO L82 PathProgramCache]: Analyzing trace with hash 1871295635, now seen corresponding path program 1 times [2019-11-20 04:18:27,079 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 04:18:27,079 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995218367] [2019-11-20 04:18:27,080 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 04:18:27,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:18:27,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:18:27,275 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 04:18:27,276 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995218367] [2019-11-20 04:18:27,277 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-20 04:18:27,277 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-20 04:18:27,279 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099332100] [2019-11-20 04:18:27,283 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-20 04:18:27,283 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 04:18:27,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-20 04:18:27,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-20 04:18:27,297 INFO L87 Difference]: Start difference. First operand 28 states. Second operand 5 states. [2019-11-20 04:18:27,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 04:18:27,425 INFO L93 Difference]: Finished difference Result 38 states and 47 transitions. [2019-11-20 04:18:27,426 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-20 04:18:27,427 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2019-11-20 04:18:27,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 04:18:27,436 INFO L225 Difference]: With dead ends: 38 [2019-11-20 04:18:27,437 INFO L226 Difference]: Without dead ends: 26 [2019-11-20 04:18:27,440 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 [2019-11-20 04:18:27,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-11-20 04:18:27,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2019-11-20 04:18:27,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-11-20 04:18:27,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 33 transitions. [2019-11-20 04:18:27,486 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 33 transitions. Word has length 9 [2019-11-20 04:18:27,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 04:18:27,487 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 33 transitions. [2019-11-20 04:18:27,487 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-20 04:18:27,487 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 33 transitions. [2019-11-20 04:18:27,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-20 04:18:27,489 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 04:18:27,490 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 04:18:27,490 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 04:18:27,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 04:18:27,491 INFO L82 PathProgramCache]: Analyzing trace with hash -1404217650, now seen corresponding path program 1 times [2019-11-20 04:18:27,491 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 04:18:27,491 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587354561] [2019-11-20 04:18:27,492 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 04:18:27,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:18:27,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:18:27,551 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 04:18:27,552 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587354561] [2019-11-20 04:18:27,552 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-20 04:18:27,552 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-20 04:18:27,552 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481429697] [2019-11-20 04:18:27,554 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-20 04:18:27,554 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 04:18:27,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-20 04:18:27,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-20 04:18:27,555 INFO L87 Difference]: Start difference. First operand 26 states and 33 transitions. Second operand 5 states. [2019-11-20 04:18:27,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 04:18:27,647 INFO L93 Difference]: Finished difference Result 32 states and 40 transitions. [2019-11-20 04:18:27,648 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-20 04:18:27,648 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2019-11-20 04:18:27,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 04:18:27,650 INFO L225 Difference]: With dead ends: 32 [2019-11-20 04:18:27,650 INFO L226 Difference]: Without dead ends: 28 [2019-11-20 04:18:27,651 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 [2019-11-20 04:18:27,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-11-20 04:18:27,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 26. [2019-11-20 04:18:27,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-11-20 04:18:27,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 33 transitions. [2019-11-20 04:18:27,661 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 33 transitions. Word has length 10 [2019-11-20 04:18:27,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 04:18:27,661 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 33 transitions. [2019-11-20 04:18:27,662 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-20 04:18:27,662 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 33 transitions. [2019-11-20 04:18:27,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-11-20 04:18:27,664 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 04:18:27,664 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 04:18:27,664 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 04:18:27,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 04:18:27,665 INFO L82 PathProgramCache]: Analyzing trace with hash -1629927371, now seen corresponding path program 1 times [2019-11-20 04:18:27,665 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 04:18:27,666 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289389226] [2019-11-20 04:18:27,666 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 04:18:27,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:18:27,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:18:27,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:18:27,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:18:27,864 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-20 04:18:27,871 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289389226] [2019-11-20 04:18:27,871 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [91626691] [2019-11-20 04:18:27,871 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_62d07144-1b50-4f11-8d03-3c6aef3fb85d/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 [2019-11-20 04:18:27,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:18:27,936 INFO L255 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-20 04:18:27,943 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 04:18:28,026 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-20 04:18:28,027 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 04:18:28,027 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2019-11-20 04:18:28,028 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473097783] [2019-11-20 04:18:28,029 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-20 04:18:28,029 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 04:18:28,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-20 04:18:28,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2019-11-20 04:18:28,030 INFO L87 Difference]: Start difference. First operand 26 states and 33 transitions. Second operand 10 states. [2019-11-20 04:18:28,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 04:18:28,252 INFO L93 Difference]: Finished difference Result 59 states and 83 transitions. [2019-11-20 04:18:28,253 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-20 04:18:28,253 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 22 [2019-11-20 04:18:28,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 04:18:28,255 INFO L225 Difference]: With dead ends: 59 [2019-11-20 04:18:28,255 INFO L226 Difference]: Without dead ends: 35 [2019-11-20 04:18:28,258 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2019-11-20 04:18:28,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-11-20 04:18:28,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 33. [2019-11-20 04:18:28,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-11-20 04:18:28,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 42 transitions. [2019-11-20 04:18:28,280 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 42 transitions. Word has length 22 [2019-11-20 04:18:28,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 04:18:28,281 INFO L462 AbstractCegarLoop]: Abstraction has 33 states and 42 transitions. [2019-11-20 04:18:28,281 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-20 04:18:28,281 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 42 transitions. [2019-11-20 04:18:28,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-11-20 04:18:28,285 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 04:18:28,286 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] [2019-11-20 04:18:28,489 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 04:18:28,489 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 04:18:28,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 04:18:28,490 INFO L82 PathProgramCache]: Analyzing trace with hash 1285987244, now seen corresponding path program 1 times [2019-11-20 04:18:28,490 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 04:18:28,490 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842587878] [2019-11-20 04:18:28,491 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 04:18:28,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:18:28,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:18:28,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:18:28,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:18:28,669 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-20 04:18:28,676 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842587878] [2019-11-20 04:18:28,676 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [461403114] [2019-11-20 04:18:28,677 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_62d07144-1b50-4f11-8d03-3c6aef3fb85d/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 [2019-11-20 04:18:28,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:18:28,729 INFO L255 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-20 04:18:28,730 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 04:18:28,770 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-20 04:18:28,770 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 04:18:28,770 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2019-11-20 04:18:28,771 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001114476] [2019-11-20 04:18:28,771 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-20 04:18:28,772 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 04:18:28,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-20 04:18:28,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2019-11-20 04:18:28,772 INFO L87 Difference]: Start difference. First operand 33 states and 42 transitions. Second operand 10 states. [2019-11-20 04:18:29,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 04:18:29,020 INFO L93 Difference]: Finished difference Result 55 states and 78 transitions. [2019-11-20 04:18:29,020 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-20 04:18:29,021 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 23 [2019-11-20 04:18:29,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 04:18:29,024 INFO L225 Difference]: With dead ends: 55 [2019-11-20 04:18:29,025 INFO L226 Difference]: Without dead ends: 51 [2019-11-20 04:18:29,026 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2019-11-20 04:18:29,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2019-11-20 04:18:29,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 48. [2019-11-20 04:18:29,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2019-11-20 04:18:29,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 68 transitions. [2019-11-20 04:18:29,041 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 68 transitions. Word has length 23 [2019-11-20 04:18:29,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 04:18:29,042 INFO L462 AbstractCegarLoop]: Abstraction has 48 states and 68 transitions. [2019-11-20 04:18:29,042 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-20 04:18:29,042 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 68 transitions. [2019-11-20 04:18:29,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2019-11-20 04:18:29,045 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 04:18:29,045 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] [2019-11-20 04:18:29,250 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 04:18:29,251 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 04:18:29,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 04:18:29,251 INFO L82 PathProgramCache]: Analyzing trace with hash -649262923, now seen corresponding path program 1 times [2019-11-20 04:18:29,252 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 04:18:29,252 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423508134] [2019-11-20 04:18:29,252 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 04:18:29,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:18:29,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:18:29,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:18:29,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:18:29,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:18:29,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:18:29,418 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-20 04:18:29,418 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423508134] [2019-11-20 04:18:29,419 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2082261852] [2019-11-20 04:18:29,419 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_62d07144-1b50-4f11-8d03-3c6aef3fb85d/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 [2019-11-20 04:18:29,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:18:29,471 INFO L255 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-20 04:18:29,475 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 04:18:29,563 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-20 04:18:29,564 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 04:18:29,565 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2019-11-20 04:18:29,566 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486407688] [2019-11-20 04:18:29,567 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-20 04:18:29,568 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 04:18:29,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-20 04:18:29,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2019-11-20 04:18:29,569 INFO L87 Difference]: Start difference. First operand 48 states and 68 transitions. Second operand 12 states. [2019-11-20 04:18:30,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 04:18:30,028 INFO L93 Difference]: Finished difference Result 114 states and 187 transitions. [2019-11-20 04:18:30,029 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-11-20 04:18:30,029 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 35 [2019-11-20 04:18:30,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 04:18:30,032 INFO L225 Difference]: With dead ends: 114 [2019-11-20 04:18:30,033 INFO L226 Difference]: Without dead ends: 68 [2019-11-20 04:18:30,035 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 [2019-11-20 04:18:30,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2019-11-20 04:18:30,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 66. [2019-11-20 04:18:30,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2019-11-20 04:18:30,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 98 transitions. [2019-11-20 04:18:30,054 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 98 transitions. Word has length 35 [2019-11-20 04:18:30,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 04:18:30,055 INFO L462 AbstractCegarLoop]: Abstraction has 66 states and 98 transitions. [2019-11-20 04:18:30,055 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-20 04:18:30,056 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 98 transitions. [2019-11-20 04:18:30,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2019-11-20 04:18:30,059 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 04:18:30,059 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] [2019-11-20 04:18:30,263 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 04:18:30,263 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 04:18:30,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 04:18:30,264 INFO L82 PathProgramCache]: Analyzing trace with hash 2000747716, now seen corresponding path program 1 times [2019-11-20 04:18:30,264 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 04:18:30,264 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127387999] [2019-11-20 04:18:30,265 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 04:18:30,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:18:30,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:18:30,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:18:30,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:18:30,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:18:30,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:18:30,407 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-11-20 04:18:30,407 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127387999] [2019-11-20 04:18:30,408 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [812499670] [2019-11-20 04:18:30,408 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_62d07144-1b50-4f11-8d03-3c6aef3fb85d/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 [2019-11-20 04:18:30,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:18:30,451 INFO L255 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-20 04:18:30,453 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 04:18:30,556 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-20 04:18:30,557 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 04:18:30,557 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 12 [2019-11-20 04:18:30,557 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692855523] [2019-11-20 04:18:30,558 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-20 04:18:30,558 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 04:18:30,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-20 04:18:30,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2019-11-20 04:18:30,559 INFO L87 Difference]: Start difference. First operand 66 states and 98 transitions. Second operand 12 states. [2019-11-20 04:18:30,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 04:18:30,961 INFO L93 Difference]: Finished difference Result 147 states and 239 transitions. [2019-11-20 04:18:30,962 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-20 04:18:30,962 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 36 [2019-11-20 04:18:30,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 04:18:30,965 INFO L225 Difference]: With dead ends: 147 [2019-11-20 04:18:30,965 INFO L226 Difference]: Without dead ends: 83 [2019-11-20 04:18:30,967 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2019-11-20 04:18:30,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2019-11-20 04:18:30,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 66. [2019-11-20 04:18:30,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2019-11-20 04:18:30,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 96 transitions. [2019-11-20 04:18:30,996 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 96 transitions. Word has length 36 [2019-11-20 04:18:30,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 04:18:30,997 INFO L462 AbstractCegarLoop]: Abstraction has 66 states and 96 transitions. [2019-11-20 04:18:30,997 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-20 04:18:30,997 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 96 transitions. [2019-11-20 04:18:31,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2019-11-20 04:18:31,007 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 04:18:31,007 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] [2019-11-20 04:18:31,214 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 04:18:31,214 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 04:18:31,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 04:18:31,215 INFO L82 PathProgramCache]: Analyzing trace with hash -434541687, now seen corresponding path program 1 times [2019-11-20 04:18:31,215 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 04:18:31,215 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830480961] [2019-11-20 04:18:31,215 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 04:18:31,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:18:31,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:18:31,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:18:31,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:18:31,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:18:31,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:18:31,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:18:31,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:18:31,445 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2019-11-20 04:18:31,446 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830480961] [2019-11-20 04:18:31,446 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [923782094] [2019-11-20 04:18:31,446 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_62d07144-1b50-4f11-8d03-3c6aef3fb85d/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 [2019-11-20 04:18:31,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:18:31,500 INFO L255 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-20 04:18:31,503 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 04:18:31,594 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-11-20 04:18:31,594 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 04:18:31,594 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 16 [2019-11-20 04:18:31,594 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750166995] [2019-11-20 04:18:31,595 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-11-20 04:18:31,595 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 04:18:31,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-11-20 04:18:31,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2019-11-20 04:18:31,596 INFO L87 Difference]: Start difference. First operand 66 states and 96 transitions. Second operand 16 states. [2019-11-20 04:18:32,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 04:18:32,257 INFO L93 Difference]: Finished difference Result 164 states and 279 transitions. [2019-11-20 04:18:32,258 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-11-20 04:18:32,258 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 50 [2019-11-20 04:18:32,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 04:18:32,262 INFO L225 Difference]: With dead ends: 164 [2019-11-20 04:18:32,262 INFO L226 Difference]: Without dead ends: 100 [2019-11-20 04:18:32,264 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=111, Invalid=489, Unknown=0, NotChecked=0, Total=600 [2019-11-20 04:18:32,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2019-11-20 04:18:32,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 89. [2019-11-20 04:18:32,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2019-11-20 04:18:32,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 145 transitions. [2019-11-20 04:18:32,285 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 145 transitions. Word has length 50 [2019-11-20 04:18:32,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 04:18:32,286 INFO L462 AbstractCegarLoop]: Abstraction has 89 states and 145 transitions. [2019-11-20 04:18:32,286 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-11-20 04:18:32,286 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 145 transitions. [2019-11-20 04:18:32,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2019-11-20 04:18:32,292 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 04:18:32,292 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] [2019-11-20 04:18:32,504 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 04:18:32,504 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 04:18:32,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 04:18:32,504 INFO L82 PathProgramCache]: Analyzing trace with hash -1917551255, now seen corresponding path program 1 times [2019-11-20 04:18:32,504 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 04:18:32,505 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208410798] [2019-11-20 04:18:32,505 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 04:18:32,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:18:32,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:18:32,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:18:32,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:18:32,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:18:32,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:18:32,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:18:32,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:18:32,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:18:32,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:18:32,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:18:32,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:18:32,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:18:32,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:18:32,890 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 33 proven. 58 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2019-11-20 04:18:32,891 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208410798] [2019-11-20 04:18:32,891 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [23956566] [2019-11-20 04:18:32,892 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_62d07144-1b50-4f11-8d03-3c6aef3fb85d/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 [2019-11-20 04:18:32,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:18:32,970 INFO L255 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-20 04:18:32,979 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 04:18:33,100 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 23 proven. 65 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2019-11-20 04:18:33,101 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 04:18:33,101 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 17 [2019-11-20 04:18:33,102 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504014456] [2019-11-20 04:18:33,103 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-11-20 04:18:33,103 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 04:18:33,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-11-20 04:18:33,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2019-11-20 04:18:33,104 INFO L87 Difference]: Start difference. First operand 89 states and 145 transitions. Second operand 17 states. [2019-11-20 04:18:33,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 04:18:33,732 INFO L93 Difference]: Finished difference Result 222 states and 415 transitions. [2019-11-20 04:18:33,733 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-11-20 04:18:33,733 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 91 [2019-11-20 04:18:33,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 04:18:33,737 INFO L225 Difference]: With dead ends: 222 [2019-11-20 04:18:33,737 INFO L226 Difference]: Without dead ends: 138 [2019-11-20 04:18:33,739 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=112, Invalid=538, Unknown=0, NotChecked=0, Total=650 [2019-11-20 04:18:33,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2019-11-20 04:18:33,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 112. [2019-11-20 04:18:33,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2019-11-20 04:18:33,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 186 transitions. [2019-11-20 04:18:33,766 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 186 transitions. Word has length 91 [2019-11-20 04:18:33,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 04:18:33,766 INFO L462 AbstractCegarLoop]: Abstraction has 112 states and 186 transitions. [2019-11-20 04:18:33,766 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-11-20 04:18:33,767 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 186 transitions. [2019-11-20 04:18:33,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2019-11-20 04:18:33,773 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 04:18:33,773 INFO L410 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 8, 7, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 04:18:33,982 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 04:18:33,982 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 04:18:33,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 04:18:33,982 INFO L82 PathProgramCache]: Analyzing trace with hash -590215841, now seen corresponding path program 2 times [2019-11-20 04:18:33,983 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 04:18:33,983 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665912033] [2019-11-20 04:18:33,983 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 04:18:34,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:18:34,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:18:34,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:18:34,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:18:34,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:18:34,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:18:34,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:18:34,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:18:34,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:18:34,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:18:34,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:18:34,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:18:34,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:18:34,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:18:34,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:18:34,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:18:34,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:18:34,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:18:34,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:18:34,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:18:34,617 INFO L134 CoverageAnalysis]: Checked inductivity of 437 backedges. 100 proven. 152 refuted. 0 times theorem prover too weak. 185 trivial. 0 not checked. [2019-11-20 04:18:34,617 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665912033] [2019-11-20 04:18:34,618 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1234032819] [2019-11-20 04:18:34,618 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_62d07144-1b50-4f11-8d03-3c6aef3fb85d/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 [2019-11-20 04:18:34,703 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-20 04:18:34,704 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 04:18:34,705 INFO L255 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-20 04:18:34,719 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 04:18:34,927 INFO L134 CoverageAnalysis]: Checked inductivity of 437 backedges. 81 proven. 83 refuted. 0 times theorem prover too weak. 273 trivial. 0 not checked. [2019-11-20 04:18:34,928 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 04:18:34,928 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 10] total 26 [2019-11-20 04:18:34,931 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029618047] [2019-11-20 04:18:34,934 INFO L442 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-11-20 04:18:34,934 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 04:18:34,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-11-20 04:18:34,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=563, Unknown=0, NotChecked=0, Total=650 [2019-11-20 04:18:34,935 INFO L87 Difference]: Start difference. First operand 112 states and 186 transitions. Second operand 26 states. [2019-11-20 04:18:36,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 04:18:36,118 INFO L93 Difference]: Finished difference Result 285 states and 569 transitions. [2019-11-20 04:18:36,119 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2019-11-20 04:18:36,119 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 132 [2019-11-20 04:18:36,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 04:18:36,121 INFO L225 Difference]: With dead ends: 285 [2019-11-20 04:18:36,121 INFO L226 Difference]: Without dead ends: 105 [2019-11-20 04:18:36,124 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 420 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=244, Invalid=1478, Unknown=0, NotChecked=0, Total=1722 [2019-11-20 04:18:36,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2019-11-20 04:18:36,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 83. [2019-11-20 04:18:36,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2019-11-20 04:18:36,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 108 transitions. [2019-11-20 04:18:36,144 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 108 transitions. Word has length 132 [2019-11-20 04:18:36,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 04:18:36,145 INFO L462 AbstractCegarLoop]: Abstraction has 83 states and 108 transitions. [2019-11-20 04:18:36,145 INFO L463 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-11-20 04:18:36,145 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 108 transitions. [2019-11-20 04:18:36,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2019-11-20 04:18:36,148 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 04:18:36,148 INFO L410 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 7, 7, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 04:18:36,352 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 04:18:36,352 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 04:18:36,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 04:18:36,352 INFO L82 PathProgramCache]: Analyzing trace with hash 350372983, now seen corresponding path program 3 times [2019-11-20 04:18:36,352 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 04:18:36,353 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225205801] [2019-11-20 04:18:36,353 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 04:18:36,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:18:36,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:18:36,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:18:36,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:18:36,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:18:36,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:18:36,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:18:36,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:18:36,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:18:36,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:18:36,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:18:36,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:18:36,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:18:36,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:18:36,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:18:36,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:18:36,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:18:36,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:18:36,789 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 105 proven. 103 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2019-11-20 04:18:36,789 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225205801] [2019-11-20 04:18:36,790 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1343417710] [2019-11-20 04:18:36,790 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_62d07144-1b50-4f11-8d03-3c6aef3fb85d/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 [2019-11-20 04:18:36,851 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2019-11-20 04:18:36,851 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 04:18:36,852 INFO L255 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-20 04:18:36,857 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 04:18:36,970 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 139 proven. 18 refuted. 0 times theorem prover too weak. 189 trivial. 0 not checked. [2019-11-20 04:18:36,970 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 04:18:36,970 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 10] total 23 [2019-11-20 04:18:36,970 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887503985] [2019-11-20 04:18:36,971 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-11-20 04:18:36,971 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 04:18:36,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-11-20 04:18:36,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2019-11-20 04:18:36,972 INFO L87 Difference]: Start difference. First operand 83 states and 108 transitions. Second operand 23 states. [2019-11-20 04:18:37,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 04:18:37,615 INFO L93 Difference]: Finished difference Result 176 states and 247 transitions. [2019-11-20 04:18:37,615 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-11-20 04:18:37,615 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 119 [2019-11-20 04:18:37,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 04:18:37,617 INFO L225 Difference]: With dead ends: 176 [2019-11-20 04:18:37,617 INFO L226 Difference]: Without dead ends: 86 [2019-11-20 04:18:37,618 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 271 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=203, Invalid=1057, Unknown=0, NotChecked=0, Total=1260 [2019-11-20 04:18:37,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2019-11-20 04:18:37,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 83. [2019-11-20 04:18:37,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2019-11-20 04:18:37,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 100 transitions. [2019-11-20 04:18:37,640 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 100 transitions. Word has length 119 [2019-11-20 04:18:37,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 04:18:37,644 INFO L462 AbstractCegarLoop]: Abstraction has 83 states and 100 transitions. [2019-11-20 04:18:37,644 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-11-20 04:18:37,644 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 100 transitions. [2019-11-20 04:18:37,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2019-11-20 04:18:37,645 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 04:18:37,646 INFO L410 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 04:18:37,857 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 04:18:37,858 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 04:18:37,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 04:18:37,859 INFO L82 PathProgramCache]: Analyzing trace with hash 1882786525, now seen corresponding path program 4 times [2019-11-20 04:18:37,859 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 04:18:37,859 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833814184] [2019-11-20 04:18:37,860 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 04:18:37,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:18:37,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:18:37,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:18:37,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:18:38,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:18:38,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:18:38,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:18:38,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:18:38,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:18:38,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:18:38,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:18:38,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:18:38,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:18:38,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:18:38,182 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 60 proven. 49 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2019-11-20 04:18:38,182 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833814184] [2019-11-20 04:18:38,183 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1278998241] [2019-11-20 04:18:38,183 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_62d07144-1b50-4f11-8d03-3c6aef3fb85d/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 [2019-11-20 04:18:38,246 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-20 04:18:38,247 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 04:18:38,248 INFO L255 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-20 04:18:38,256 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 04:18:38,341 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 58 proven. 15 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2019-11-20 04:18:38,342 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 04:18:38,342 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 8] total 19 [2019-11-20 04:18:38,342 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532320800] [2019-11-20 04:18:38,343 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-11-20 04:18:38,343 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 04:18:38,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-11-20 04:18:38,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2019-11-20 04:18:38,344 INFO L87 Difference]: Start difference. First operand 83 states and 100 transitions. Second operand 19 states. [2019-11-20 04:18:38,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 04:18:38,724 INFO L93 Difference]: Finished difference Result 103 states and 122 transitions. [2019-11-20 04:18:38,724 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-11-20 04:18:38,724 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 91 [2019-11-20 04:18:38,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 04:18:38,726 INFO L225 Difference]: With dead ends: 103 [2019-11-20 04:18:38,726 INFO L226 Difference]: Without dead ends: 92 [2019-11-20 04:18:38,727 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=101, Invalid=499, Unknown=0, NotChecked=0, Total=600 [2019-11-20 04:18:38,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2019-11-20 04:18:38,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 87. [2019-11-20 04:18:38,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2019-11-20 04:18:38,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 102 transitions. [2019-11-20 04:18:38,740 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 102 transitions. Word has length 91 [2019-11-20 04:18:38,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 04:18:38,742 INFO L462 AbstractCegarLoop]: Abstraction has 87 states and 102 transitions. [2019-11-20 04:18:38,742 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-11-20 04:18:38,743 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 102 transitions. [2019-11-20 04:18:38,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2019-11-20 04:18:38,744 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 04:18:38,744 INFO L410 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 6, 6, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 04:18:38,957 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 04:18:38,958 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 04:18:38,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 04:18:38,958 INFO L82 PathProgramCache]: Analyzing trace with hash -1335172610, now seen corresponding path program 5 times [2019-11-20 04:18:38,958 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 04:18:38,961 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295703105] [2019-11-20 04:18:38,961 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 04:18:38,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:18:39,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:18:39,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:18:39,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:18:39,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:18:39,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:18:39,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:18:39,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:18:39,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:18:39,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:18:39,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:18:39,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:18:39,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:18:39,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:18:39,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:18:39,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:18:39,692 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2019-11-20 04:18:39,693 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295703105] [2019-11-20 04:18:39,693 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [861657132] [2019-11-20 04:18:39,693 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_62d07144-1b50-4f11-8d03-3c6aef3fb85d/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 [2019-11-20 04:18:39,771 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2019-11-20 04:18:39,772 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 04:18:39,775 INFO L255 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 63 conjunts are in the unsatisfiable core [2019-11-20 04:18:39,778 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 04:18:40,384 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2019-11-20 04:18:40,385 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 04:18:40,385 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 28 [2019-11-20 04:18:40,385 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519802359] [2019-11-20 04:18:40,386 INFO L442 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-11-20 04:18:40,386 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 04:18:40,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-11-20 04:18:40,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=691, Unknown=0, NotChecked=0, Total=756 [2019-11-20 04:18:40,387 INFO L87 Difference]: Start difference. First operand 87 states and 102 transitions. Second operand 28 states. [2019-11-20 04:18:40,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 04:18:40,734 INFO L93 Difference]: Finished difference Result 100 states and 116 transitions. [2019-11-20 04:18:40,735 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-11-20 04:18:40,735 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 105 [2019-11-20 04:18:40,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 04:18:40,736 INFO L225 Difference]: With dead ends: 100 [2019-11-20 04:18:40,736 INFO L226 Difference]: Without dead ends: 90 [2019-11-20 04:18:40,737 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 133 SyntacticMatches, 8 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=65, Invalid=691, Unknown=0, NotChecked=0, Total=756 [2019-11-20 04:18:40,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2019-11-20 04:18:40,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 89. [2019-11-20 04:18:40,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2019-11-20 04:18:40,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 105 transitions. [2019-11-20 04:18:40,746 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 105 transitions. Word has length 105 [2019-11-20 04:18:40,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 04:18:40,747 INFO L462 AbstractCegarLoop]: Abstraction has 89 states and 105 transitions. [2019-11-20 04:18:40,747 INFO L463 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-11-20 04:18:40,747 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 105 transitions. [2019-11-20 04:18:40,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2019-11-20 04:18:40,749 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 04:18:40,749 INFO L410 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 6, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 04:18:40,952 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 04:18:40,952 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 04:18:40,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 04:18:40,953 INFO L82 PathProgramCache]: Analyzing trace with hash 1449179333, now seen corresponding path program 6 times [2019-11-20 04:18:40,953 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 04:18:40,953 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962733019] [2019-11-20 04:18:40,953 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 04:18:40,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:18:40,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:18:41,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:18:41,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:18:41,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:18:41,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:18:41,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:18:41,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:18:41,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:18:41,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:18:41,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:18:41,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:18:41,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:18:41,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:18:41,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:18:41,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:18:41,092 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 71 proven. 6 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2019-11-20 04:18:41,093 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962733019] [2019-11-20 04:18:41,093 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [727107755] [2019-11-20 04:18:41,093 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_62d07144-1b50-4f11-8d03-3c6aef3fb85d/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 [2019-11-20 04:18:41,149 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2019-11-20 04:18:41,149 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 04:18:41,150 INFO L255 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-20 04:18:41,152 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 04:18:41,183 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 118 proven. 0 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2019-11-20 04:18:41,184 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-20 04:18:41,184 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 7 [2019-11-20 04:18:41,184 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032426822] [2019-11-20 04:18:41,185 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-20 04:18:41,185 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 04:18:41,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-20 04:18:41,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-11-20 04:18:41,186 INFO L87 Difference]: Start difference. First operand 89 states and 105 transitions. Second operand 6 states. [2019-11-20 04:18:41,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 04:18:41,247 INFO L93 Difference]: Finished difference Result 101 states and 117 transitions. [2019-11-20 04:18:41,248 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-20 04:18:41,248 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 104 [2019-11-20 04:18:41,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 04:18:41,249 INFO L225 Difference]: With dead ends: 101 [2019-11-20 04:18:41,249 INFO L226 Difference]: Without dead ends: 0 [2019-11-20 04:18:41,250 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 135 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-11-20 04:18:41,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-11-20 04:18:41,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-11-20 04:18:41,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-11-20 04:18:41,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-11-20 04:18:41,250 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 104 [2019-11-20 04:18:41,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 04:18:41,251 INFO L462 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-11-20 04:18:41,251 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-20 04:18:41,251 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-11-20 04:18:41,251 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-11-20 04:18:41,456 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 04:18:41,460 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2019-11-20 04:18:42,142 WARN L191 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 25 [2019-11-20 04:18:42,457 WARN L191 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 22 [2019-11-20 04:18:42,459 INFO L444 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2019-11-20 04:18:42,459 INFO L444 ceAbstractionStarter]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2019-11-20 04:18:42,460 INFO L444 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2019-11-20 04:18:42,460 INFO L444 ceAbstractionStarter]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 39) no Hoare annotation was computed. [2019-11-20 04:18:42,460 INFO L440 ceAbstractionStarter]: At program point L41(lines 35 42) the Hoare annotation is: (<= 5 ULTIMATE.start_main_~x~0) [2019-11-20 04:18:42,460 INFO L444 ceAbstractionStarter]: For program point L39(line 39) no Hoare annotation was computed. [2019-11-20 04:18:42,460 INFO L444 ceAbstractionStarter]: For program point L38(lines 38 40) no Hoare annotation was computed. [2019-11-20 04:18:42,460 INFO L440 ceAbstractionStarter]: At program point L37(line 37) the Hoare annotation is: (and (<= 5 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~x~0 5)) [2019-11-20 04:18:42,461 INFO L444 ceAbstractionStarter]: For program point L37-1(line 37) no Hoare annotation was computed. [2019-11-20 04:18:42,461 INFO L444 ceAbstractionStarter]: For program point L38-2(lines 38 40) no Hoare annotation was computed. [2019-11-20 04:18:42,461 INFO L447 ceAbstractionStarter]: At program point fibo2ENTRY(lines 17 25) the Hoare annotation is: true [2019-11-20 04:18:42,461 INFO L440 ceAbstractionStarter]: At program point L23(line 23) the Hoare annotation is: (and (= fibo2_~n |fibo2_#in~n|) (not (<= |fibo2_#in~n| 2))) [2019-11-20 04:18:42,461 INFO L444 ceAbstractionStarter]: For program point L23-1(line 23) no Hoare annotation was computed. [2019-11-20 04:18:42,461 INFO L440 ceAbstractionStarter]: At program point L23-2(line 23) the Hoare annotation is: (and (let ((.cse0 (= fibo2_~n |fibo2_#in~n|))) (or (and (<= |fibo2_#in~n| 3) .cse0) (and (<= 5 |fibo2_#in~n|) .cse0) (and (<= |fibo2_#t~ret2| 2) .cse0 (<= 2 |fibo2_#t~ret2|)))) (or (<= 4 fibo2_~n) (and (<= 1 |fibo2_#t~ret2|) (<= |fibo2_#t~ret2| 1))) (not (<= |fibo2_#in~n| 2))) [2019-11-20 04:18:42,462 INFO L444 ceAbstractionStarter]: For program point L20(lines 20 24) no Hoare annotation was computed. [2019-11-20 04:18:42,462 INFO L444 ceAbstractionStarter]: For program point L23-3(line 23) no Hoare annotation was computed. [2019-11-20 04:18:42,462 INFO L444 ceAbstractionStarter]: For program point L18(lines 18 24) no Hoare annotation was computed. [2019-11-20 04:18:42,462 INFO L444 ceAbstractionStarter]: For program point fibo2FINAL(lines 17 25) no Hoare annotation was computed. [2019-11-20 04:18:42,462 INFO L444 ceAbstractionStarter]: For program point fibo2EXIT(lines 17 25) no Hoare annotation was computed. [2019-11-20 04:18:42,462 INFO L447 ceAbstractionStarter]: At program point fibo1ENTRY(lines 7 15) the Hoare annotation is: true [2019-11-20 04:18:42,462 INFO L440 ceAbstractionStarter]: At program point L13(line 13) the Hoare annotation is: (and (not (<= |fibo1_#in~n| 1)) (= fibo1_~n |fibo1_#in~n|)) [2019-11-20 04:18:42,462 INFO L444 ceAbstractionStarter]: For program point L13-1(line 13) no Hoare annotation was computed. [2019-11-20 04:18:42,463 INFO L440 ceAbstractionStarter]: At program point L13-2(line 13) the Hoare annotation is: (and (let ((.cse0 (= fibo1_~n |fibo1_#in~n|))) (or (and (<= 4 fibo1_~n) .cse0) (and (<= 1 |fibo1_#t~ret0|) (<= |fibo1_#t~ret0| 1) .cse0))) (< 1 fibo1_~n) (or (<= |fibo1_#in~n| 4) (and (<= 3 |fibo1_#t~ret0|) (<= |fibo1_#t~ret0| 3)) (<= 6 |fibo1_#in~n|))) [2019-11-20 04:18:42,463 INFO L444 ceAbstractionStarter]: For program point fibo1FINAL(lines 7 15) no Hoare annotation was computed. [2019-11-20 04:18:42,463 INFO L444 ceAbstractionStarter]: For program point L10(lines 10 14) no Hoare annotation was computed. [2019-11-20 04:18:42,463 INFO L444 ceAbstractionStarter]: For program point L13-3(line 13) no Hoare annotation was computed. [2019-11-20 04:18:42,463 INFO L444 ceAbstractionStarter]: For program point L8(lines 8 14) no Hoare annotation was computed. [2019-11-20 04:18:42,463 INFO L444 ceAbstractionStarter]: For program point fibo1EXIT(lines 7 15) no Hoare annotation was computed. [2019-11-20 04:18:42,476 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.11 04:18:42 BoogieIcfgContainer [2019-11-20 04:18:42,476 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-20 04:18:42,476 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-20 04:18:42,476 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-20 04:18:42,476 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-20 04:18:42,477 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 04:18:26" (3/4) ... [2019-11-20 04:18:42,480 INFO L137 WitnessPrinter]: Generating witness for correct program [2019-11-20 04:18:42,485 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure fibo2 [2019-11-20 04:18:42,485 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure fibo1 [2019-11-20 04:18:42,490 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2019-11-20 04:18:42,490 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2019-11-20 04:18:42,550 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_62d07144-1b50-4f11-8d03-3c6aef3fb85d/bin/uautomizer/witness.graphml [2019-11-20 04:18:42,550 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-20 04:18:42,552 INFO L168 Benchmark]: Toolchain (without parser) took 16446.66 ms. Allocated memory was 1.0 GB in the beginning and 1.3 GB in the end (delta: 245.4 MB). Free memory was 944.7 MB in the beginning and 1.2 GB in the end (delta: -295.0 MB). There was no memory consumed. Max. memory is 11.5 GB. [2019-11-20 04:18:42,553 INFO L168 Benchmark]: CDTParser took 0.33 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. [2019-11-20 04:18:42,562 INFO L168 Benchmark]: CACSL2BoogieTranslator took 450.94 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 154.7 MB). Free memory was 944.7 MB in the beginning and 1.1 GB in the end (delta: -204.7 MB). Peak memory consumption was 23.3 MB. Max. memory is 11.5 GB. [2019-11-20 04:18:42,562 INFO L168 Benchmark]: Boogie Procedure Inliner took 42.54 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. [2019-11-20 04:18:42,563 INFO L168 Benchmark]: Boogie Preprocessor took 32.40 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. [2019-11-20 04:18:42,563 INFO L168 Benchmark]: RCFGBuilder took 291.78 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: 18.3 MB). Peak memory consumption was 18.3 MB. Max. memory is 11.5 GB. [2019-11-20 04:18:42,564 INFO L168 Benchmark]: TraceAbstraction took 15549.22 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 90.7 MB). Free memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: -111.5 MB). Peak memory consumption was 317.2 MB. Max. memory is 11.5 GB. [2019-11-20 04:18:42,564 INFO L168 Benchmark]: Witness Printer took 74.51 ms. Allocated memory is still 1.3 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 2.8 MB). Peak memory consumption was 2.8 MB. Max. memory is 11.5 GB. [2019-11-20 04:18:42,567 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.33 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 450.94 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 154.7 MB). Free memory was 944.7 MB in the beginning and 1.1 GB in the end (delta: -204.7 MB). Peak memory consumption was 23.3 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 42.54 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 32.40 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 291.78 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: 18.3 MB). Peak memory consumption was 18.3 MB. Max. memory is 11.5 GB. * TraceAbstraction took 15549.22 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 90.7 MB). Free memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: -111.5 MB). Peak memory consumption was 317.2 MB. Max. memory is 11.5 GB. * Witness Printer took 74.51 ms. Allocated memory is still 1.3 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 2.8 MB). Peak memory consumption was 2.8 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 39]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 35]: Loop Invariant Derived loop invariant: 5 <= x - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 28 locations, 1 error locations. Result: SAFE, OverallTime: 15.4s, OverallIterations: 13, TraceHistogramMax: 10, AutomataDifference: 5.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 1.0s, HoareTripleCheckerStatistics: 350 SDtfs, 544 SDslu, 2847 SDs, 0 SdLazy, 3648 SolverSat, 543 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 3.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1266 GetRequests, 1021 SyntacticMatches, 10 SemanticMatches, 235 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1129 ImplicationChecksByTransitivity, 4.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=112occurred in iteration=8, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 13 MinimizatonAttempts, 94 StatesRemovedByMinimization, 11 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 368 PreInvPairs, 511 NumberOfFragments, 105 HoareAnnotationTreeSize, 368 FomulaSimplifications, 1913 FormulaSimplificationTreeSizeReduction, 0.2s HoareSimplificationTime, 8 FomulaSimplificationsInter, 3623 FormulaSimplificationTreeSizeReductionInter, 0.6s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 5.0s InterpolantComputationTime, 1635 NumberOfCodeBlocks, 1541 NumberOfCodeBlocksAsserted, 38 NumberOfCheckSat, 1611 ConstructedInterpolants, 0 QuantifiedInterpolants, 319341 SizeOfPredicates, 41 NumberOfNonLiveVariables, 1595 ConjunctsInSsa, 145 ConjunctsInUnsatCore, 24 InterpolantComputations, 3 PerfectInterpolantSequences, 2724/3528 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...