./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive-simple/fibo_2calls_5-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cad46833 Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_46a5a639-4a46-4f89-b0d8-3b37b842acf3/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_46a5a639-4a46-4f89-b0d8-3b37b842acf3/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_46a5a639-4a46-4f89-b0d8-3b37b842acf3/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_46a5a639-4a46-4f89-b0d8-3b37b842acf3/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive-simple/fibo_2calls_5-2.c -s /tmp/vcloud-vcloud-master/worker/run_dir_46a5a639-4a46-4f89-b0d8-3b37b842acf3/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_46a5a639-4a46-4f89-b0d8-3b37b842acf3/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 fe571d33601eb001defa960d70b02ea99b59263c .............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.1.24-cad4683 [2019-11-16 00:25:51,874 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-16 00:25:51,876 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-16 00:25:51,888 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-16 00:25:51,889 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-16 00:25:51,890 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-16 00:25:51,892 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-16 00:25:51,894 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-16 00:25:51,896 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-16 00:25:51,897 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-16 00:25:51,898 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-16 00:25:51,899 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-16 00:25:51,900 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-16 00:25:51,901 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-16 00:25:51,902 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-16 00:25:51,903 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-16 00:25:51,904 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-16 00:25:51,905 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-16 00:25:51,906 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-16 00:25:51,909 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-16 00:25:51,910 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-16 00:25:51,911 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-16 00:25:51,912 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-16 00:25:51,913 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-16 00:25:51,916 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-16 00:25:51,916 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-16 00:25:51,916 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-16 00:25:51,917 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-16 00:25:51,917 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-16 00:25:51,918 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-16 00:25:51,919 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-16 00:25:51,919 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-16 00:25:51,920 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-16 00:25:51,921 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-16 00:25:51,922 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-16 00:25:51,922 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-16 00:25:51,923 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-16 00:25:51,923 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-16 00:25:51,923 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-16 00:25:51,924 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-16 00:25:51,925 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-16 00:25:51,926 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_46a5a639-4a46-4f89-b0d8-3b37b842acf3/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-16 00:25:51,940 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-16 00:25:51,941 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-16 00:25:51,942 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-16 00:25:51,942 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-16 00:25:51,942 INFO L138 SettingsManager]: * Use SBE=true [2019-11-16 00:25:51,943 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-16 00:25:51,943 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-16 00:25:51,943 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-16 00:25:51,943 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-16 00:25:51,944 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-16 00:25:51,944 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-16 00:25:51,944 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-16 00:25:51,944 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-16 00:25:51,945 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-16 00:25:51,945 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-16 00:25:51,945 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-16 00:25:51,946 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-16 00:25:51,946 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-16 00:25:51,946 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-16 00:25:51,946 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-16 00:25:51,947 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-16 00:25:51,947 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-16 00:25:51,947 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-16 00:25:51,947 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-16 00:25:51,948 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-16 00:25:51,948 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-16 00:25:51,948 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-16 00:25:51,948 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-16 00:25:51,949 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_46a5a639-4a46-4f89-b0d8-3b37b842acf3/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 -> fe571d33601eb001defa960d70b02ea99b59263c [2019-11-16 00:25:51,980 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-16 00:25:51,992 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-16 00:25:51,996 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-16 00:25:51,997 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-16 00:25:51,998 INFO L275 PluginConnector]: CDTParser initialized [2019-11-16 00:25:51,999 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_46a5a639-4a46-4f89-b0d8-3b37b842acf3/bin/uautomizer/../../sv-benchmarks/c/recursive-simple/fibo_2calls_5-2.c [2019-11-16 00:25:52,054 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_46a5a639-4a46-4f89-b0d8-3b37b842acf3/bin/uautomizer/data/53235dcaa/7b8b313c07f24ebd9ec62f5224fa89ce/FLAG31b47deec [2019-11-16 00:25:52,479 INFO L306 CDTParser]: Found 1 translation units. [2019-11-16 00:25:52,480 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_46a5a639-4a46-4f89-b0d8-3b37b842acf3/sv-benchmarks/c/recursive-simple/fibo_2calls_5-2.c [2019-11-16 00:25:52,488 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_46a5a639-4a46-4f89-b0d8-3b37b842acf3/bin/uautomizer/data/53235dcaa/7b8b313c07f24ebd9ec62f5224fa89ce/FLAG31b47deec [2019-11-16 00:25:52,882 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_46a5a639-4a46-4f89-b0d8-3b37b842acf3/bin/uautomizer/data/53235dcaa/7b8b313c07f24ebd9ec62f5224fa89ce [2019-11-16 00:25:52,885 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-16 00:25:52,886 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-16 00:25:52,888 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-16 00:25:52,888 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-16 00:25:52,892 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-16 00:25:52,893 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 12:25:52" (1/1) ... [2019-11-16 00:25:52,896 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3c70144d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:25:52, skipping insertion in model container [2019-11-16 00:25:52,896 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 12:25:52" (1/1) ... [2019-11-16 00:25:52,904 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-16 00:25:52,921 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-16 00:25:53,108 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-16 00:25:53,113 INFO L188 MainTranslator]: Completed pre-run [2019-11-16 00:25:53,212 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-16 00:25:53,230 INFO L192 MainTranslator]: Completed translation [2019-11-16 00:25:53,231 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:25:53 WrapperNode [2019-11-16 00:25:53,231 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-16 00:25:53,232 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-16 00:25:53,232 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-16 00:25:53,232 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-16 00:25:53,242 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:25:53" (1/1) ... [2019-11-16 00:25:53,249 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:25:53" (1/1) ... [2019-11-16 00:25:53,266 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-16 00:25:53,267 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-16 00:25:53,267 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-16 00:25:53,267 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-16 00:25:53,275 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:25:53" (1/1) ... [2019-11-16 00:25:53,275 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:25:53" (1/1) ... [2019-11-16 00:25:53,276 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:25:53" (1/1) ... [2019-11-16 00:25:53,276 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:25:53" (1/1) ... [2019-11-16 00:25:53,278 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:25:53" (1/1) ... [2019-11-16 00:25:53,281 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:25:53" (1/1) ... [2019-11-16 00:25:53,282 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:25:53" (1/1) ... [2019-11-16 00:25:53,284 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-16 00:25:53,285 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-16 00:25:53,285 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-16 00:25:53,285 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-16 00:25:53,286 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:25:53" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_46a5a639-4a46-4f89-b0d8-3b37b842acf3/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 [2019-11-16 00:25:53,345 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-16 00:25:53,346 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-16 00:25:53,346 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2019-11-16 00:25:53,346 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2019-11-16 00:25:53,347 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2019-11-16 00:25:53,347 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2019-11-16 00:25:53,551 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-16 00:25:53,551 INFO L284 CfgBuilder]: Removed 4 assume(true) statements. [2019-11-16 00:25:53,553 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 12:25:53 BoogieIcfgContainer [2019-11-16 00:25:53,553 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-16 00:25:53,554 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-16 00:25:53,554 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-16 00:25:53,557 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-16 00:25:53,557 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 12:25:52" (1/3) ... [2019-11-16 00:25:53,558 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e6bfa44 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 12:25:53, skipping insertion in model container [2019-11-16 00:25:53,559 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:25:53" (2/3) ... [2019-11-16 00:25:53,559 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e6bfa44 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 12:25:53, skipping insertion in model container [2019-11-16 00:25:53,559 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 12:25:53" (3/3) ... [2019-11-16 00:25:53,561 INFO L109 eAbstractionObserver]: Analyzing ICFG fibo_2calls_5-2.c [2019-11-16 00:25:53,572 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-16 00:25:53,580 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-16 00:25:53,592 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-16 00:25:53,617 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-16 00:25:53,617 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-16 00:25:53,618 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-16 00:25:53,618 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-16 00:25:53,618 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-16 00:25:53,618 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-16 00:25:53,618 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-16 00:25:53,619 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-16 00:25:53,638 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states. [2019-11-16 00:25:53,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-11-16 00:25:53,644 INFO L372 BasicCegarLoop]: Found error trace [2019-11-16 00:25:53,645 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-16 00:25:53,647 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-16 00:25:53,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-16 00:25:53,653 INFO L82 PathProgramCache]: Analyzing trace with hash 1871295635, now seen corresponding path program 1 times [2019-11-16 00:25:53,662 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-16 00:25:53,663 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531053561] [2019-11-16 00:25:53,663 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:25:53,663 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:25:53,664 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-16 00:25:53,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:25:53,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:25:53,948 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-16 00:25:53,949 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531053561] [2019-11-16 00:25:53,950 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-16 00:25:53,950 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-11-16 00:25:53,951 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582061321] [2019-11-16 00:25:53,955 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-16 00:25:53,956 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-16 00:25:53,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-16 00:25:53,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-11-16 00:25:53,969 INFO L87 Difference]: Start difference. First operand 28 states. Second operand 7 states. [2019-11-16 00:25:54,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-16 00:25:54,131 INFO L93 Difference]: Finished difference Result 38 states and 47 transitions. [2019-11-16 00:25:54,133 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-16 00:25:54,134 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 9 [2019-11-16 00:25:54,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-16 00:25:54,148 INFO L225 Difference]: With dead ends: 38 [2019-11-16 00:25:54,149 INFO L226 Difference]: Without dead ends: 26 [2019-11-16 00:25:54,153 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2019-11-16 00:25:54,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-11-16 00:25:54,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2019-11-16 00:25:54,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-11-16 00:25:54,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 33 transitions. [2019-11-16 00:25:54,197 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 33 transitions. Word has length 9 [2019-11-16 00:25:54,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-16 00:25:54,198 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 33 transitions. [2019-11-16 00:25:54,198 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-16 00:25:54,198 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 33 transitions. [2019-11-16 00:25:54,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-16 00:25:54,199 INFO L372 BasicCegarLoop]: Found error trace [2019-11-16 00:25:54,200 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-16 00:25:54,200 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-16 00:25:54,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-16 00:25:54,200 INFO L82 PathProgramCache]: Analyzing trace with hash -1404217650, now seen corresponding path program 1 times [2019-11-16 00:25:54,201 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-16 00:25:54,201 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971777783] [2019-11-16 00:25:54,201 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:25:54,201 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:25:54,201 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-16 00:25:54,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:25:54,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:25:54,333 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-16 00:25:54,333 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971777783] [2019-11-16 00:25:54,334 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-16 00:25:54,334 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-11-16 00:25:54,334 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294562192] [2019-11-16 00:25:54,336 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-16 00:25:54,336 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-16 00:25:54,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-16 00:25:54,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-11-16 00:25:54,337 INFO L87 Difference]: Start difference. First operand 26 states and 33 transitions. Second operand 7 states. [2019-11-16 00:25:54,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-16 00:25:54,467 INFO L93 Difference]: Finished difference Result 32 states and 40 transitions. [2019-11-16 00:25:54,469 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-16 00:25:54,469 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 10 [2019-11-16 00:25:54,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-16 00:25:54,471 INFO L225 Difference]: With dead ends: 32 [2019-11-16 00:25:54,471 INFO L226 Difference]: Without dead ends: 28 [2019-11-16 00:25:54,472 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2019-11-16 00:25:54,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-11-16 00:25:54,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 26. [2019-11-16 00:25:54,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-11-16 00:25:54,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 33 transitions. [2019-11-16 00:25:54,489 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 33 transitions. Word has length 10 [2019-11-16 00:25:54,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-16 00:25:54,490 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 33 transitions. [2019-11-16 00:25:54,490 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-16 00:25:54,490 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 33 transitions. [2019-11-16 00:25:54,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-11-16 00:25:54,492 INFO L372 BasicCegarLoop]: Found error trace [2019-11-16 00:25:54,493 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-16 00:25:54,494 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-16 00:25:54,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-16 00:25:54,495 INFO L82 PathProgramCache]: Analyzing trace with hash -1629927371, now seen corresponding path program 1 times [2019-11-16 00:25:54,495 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-16 00:25:54,497 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256888129] [2019-11-16 00:25:54,497 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:25:54,497 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:25:54,497 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-16 00:25:54,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:25:54,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:25:54,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:25:54,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:25:54,713 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-16 00:25:54,714 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256888129] [2019-11-16 00:25:54,714 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1321034332] [2019-11-16 00:25:54,714 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_46a5a639-4a46-4f89-b0d8-3b37b842acf3/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 [2019-11-16 00:25:54,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:25:54,786 INFO L256 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-16 00:25:54,791 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-16 00:25:54,882 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-16 00:25:54,882 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-16 00:25:54,883 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7] total 12 [2019-11-16 00:25:54,883 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679534715] [2019-11-16 00:25:54,884 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-16 00:25:54,884 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-16 00:25:54,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-16 00:25:54,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2019-11-16 00:25:54,885 INFO L87 Difference]: Start difference. First operand 26 states and 33 transitions. Second operand 12 states. [2019-11-16 00:25:55,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-16 00:25:55,079 INFO L93 Difference]: Finished difference Result 59 states and 83 transitions. [2019-11-16 00:25:55,082 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-16 00:25:55,082 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 22 [2019-11-16 00:25:55,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-16 00:25:55,084 INFO L225 Difference]: With dead ends: 59 [2019-11-16 00:25:55,084 INFO L226 Difference]: Without dead ends: 35 [2019-11-16 00:25:55,086 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2019-11-16 00:25:55,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-11-16 00:25:55,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 33. [2019-11-16 00:25:55,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-11-16 00:25:55,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 42 transitions. [2019-11-16 00:25:55,101 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 42 transitions. Word has length 22 [2019-11-16 00:25:55,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-16 00:25:55,101 INFO L462 AbstractCegarLoop]: Abstraction has 33 states and 42 transitions. [2019-11-16 00:25:55,105 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-16 00:25:55,105 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 42 transitions. [2019-11-16 00:25:55,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-11-16 00:25:55,109 INFO L372 BasicCegarLoop]: Found error trace [2019-11-16 00:25:55,110 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-16 00:25:55,313 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-16 00:25:55,313 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-16 00:25:55,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-16 00:25:55,314 INFO L82 PathProgramCache]: Analyzing trace with hash 1285987244, now seen corresponding path program 1 times [2019-11-16 00:25:55,314 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-16 00:25:55,315 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8156135] [2019-11-16 00:25:55,316 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:25:55,316 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:25:55,316 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-16 00:25:55,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:25:55,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:25:55,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:25:55,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:25:55,500 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-16 00:25:55,503 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8156135] [2019-11-16 00:25:55,503 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1929967055] [2019-11-16 00:25:55,504 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_46a5a639-4a46-4f89-b0d8-3b37b842acf3/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 [2019-11-16 00:25:55,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:25:55,547 INFO L256 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-16 00:25:55,550 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-16 00:25:55,608 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-16 00:25:55,608 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-16 00:25:55,609 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7] total 12 [2019-11-16 00:25:55,609 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113731866] [2019-11-16 00:25:55,610 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-16 00:25:55,610 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-16 00:25:55,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-16 00:25:55,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2019-11-16 00:25:55,611 INFO L87 Difference]: Start difference. First operand 33 states and 42 transitions. Second operand 12 states. [2019-11-16 00:25:55,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-16 00:25:55,901 INFO L93 Difference]: Finished difference Result 55 states and 78 transitions. [2019-11-16 00:25:55,902 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-16 00:25:55,902 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 23 [2019-11-16 00:25:55,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-16 00:25:55,906 INFO L225 Difference]: With dead ends: 55 [2019-11-16 00:25:55,907 INFO L226 Difference]: Without dead ends: 51 [2019-11-16 00:25:55,908 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2019-11-16 00:25:55,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2019-11-16 00:25:55,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 48. [2019-11-16 00:25:55,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2019-11-16 00:25:55,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 68 transitions. [2019-11-16 00:25:55,931 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 68 transitions. Word has length 23 [2019-11-16 00:25:55,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-16 00:25:55,932 INFO L462 AbstractCegarLoop]: Abstraction has 48 states and 68 transitions. [2019-11-16 00:25:55,932 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-16 00:25:55,933 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 68 transitions. [2019-11-16 00:25:55,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2019-11-16 00:25:55,937 INFO L372 BasicCegarLoop]: Found error trace [2019-11-16 00:25:55,937 INFO L380 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] [2019-11-16 00:25:56,149 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-16 00:25:56,149 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-16 00:25:56,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-16 00:25:56,150 INFO L82 PathProgramCache]: Analyzing trace with hash -649262923, now seen corresponding path program 1 times [2019-11-16 00:25:56,150 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-16 00:25:56,150 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098755615] [2019-11-16 00:25:56,151 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:25:56,151 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:25:56,151 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-16 00:25:56,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:25:56,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:25:56,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:25:56,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:25:56,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:25:56,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:25:56,363 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-16 00:25:56,363 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098755615] [2019-11-16 00:25:56,363 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [411366371] [2019-11-16 00:25:56,364 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_46a5a639-4a46-4f89-b0d8-3b37b842acf3/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 [2019-11-16 00:25:56,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:25:56,431 INFO L256 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-16 00:25:56,434 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-16 00:25:56,534 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-16 00:25:56,534 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-16 00:25:56,534 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2019-11-16 00:25:56,534 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236512808] [2019-11-16 00:25:56,535 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-16 00:25:56,536 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-16 00:25:56,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-16 00:25:56,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2019-11-16 00:25:56,536 INFO L87 Difference]: Start difference. First operand 48 states and 68 transitions. Second operand 14 states. [2019-11-16 00:25:57,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-16 00:25:57,077 INFO L93 Difference]: Finished difference Result 114 states and 187 transitions. [2019-11-16 00:25:57,077 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-11-16 00:25:57,077 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 35 [2019-11-16 00:25:57,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-16 00:25:57,081 INFO L225 Difference]: With dead ends: 114 [2019-11-16 00:25:57,081 INFO L226 Difference]: Without dead ends: 68 [2019-11-16 00:25:57,083 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2019-11-16 00:25:57,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2019-11-16 00:25:57,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 66. [2019-11-16 00:25:57,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2019-11-16 00:25:57,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 98 transitions. [2019-11-16 00:25:57,102 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 98 transitions. Word has length 35 [2019-11-16 00:25:57,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-16 00:25:57,102 INFO L462 AbstractCegarLoop]: Abstraction has 66 states and 98 transitions. [2019-11-16 00:25:57,102 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-16 00:25:57,103 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 98 transitions. [2019-11-16 00:25:57,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2019-11-16 00:25:57,105 INFO L372 BasicCegarLoop]: Found error trace [2019-11-16 00:25:57,106 INFO L380 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] [2019-11-16 00:25:57,317 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-16 00:25:57,318 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-16 00:25:57,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-16 00:25:57,318 INFO L82 PathProgramCache]: Analyzing trace with hash 2000747716, now seen corresponding path program 1 times [2019-11-16 00:25:57,318 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-16 00:25:57,319 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237225950] [2019-11-16 00:25:57,319 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:25:57,319 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:25:57,319 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-16 00:25:57,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:25:57,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:25:57,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:25:57,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:25:57,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:25:57,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:25:57,533 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-11-16 00:25:57,533 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237225950] [2019-11-16 00:25:57,534 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1257153197] [2019-11-16 00:25:57,534 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_46a5a639-4a46-4f89-b0d8-3b37b842acf3/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 [2019-11-16 00:25:57,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:25:57,584 INFO L256 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-16 00:25:57,587 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-16 00:25:57,714 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-16 00:25:57,715 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-16 00:25:57,715 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 14 [2019-11-16 00:25:57,715 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516027392] [2019-11-16 00:25:57,716 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-16 00:25:57,716 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-16 00:25:57,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-16 00:25:57,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2019-11-16 00:25:57,717 INFO L87 Difference]: Start difference. First operand 66 states and 98 transitions. Second operand 14 states. [2019-11-16 00:25:58,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-16 00:25:58,078 INFO L93 Difference]: Finished difference Result 147 states and 239 transitions. [2019-11-16 00:25:58,080 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-16 00:25:58,080 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 36 [2019-11-16 00:25:58,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-16 00:25:58,083 INFO L225 Difference]: With dead ends: 147 [2019-11-16 00:25:58,083 INFO L226 Difference]: Without dead ends: 83 [2019-11-16 00:25:58,086 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2019-11-16 00:25:58,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2019-11-16 00:25:58,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 66. [2019-11-16 00:25:58,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2019-11-16 00:25:58,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 96 transitions. [2019-11-16 00:25:58,116 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 96 transitions. Word has length 36 [2019-11-16 00:25:58,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-16 00:25:58,117 INFO L462 AbstractCegarLoop]: Abstraction has 66 states and 96 transitions. [2019-11-16 00:25:58,117 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-16 00:25:58,117 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 96 transitions. [2019-11-16 00:25:58,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2019-11-16 00:25:58,120 INFO L372 BasicCegarLoop]: Found error trace [2019-11-16 00:25:58,120 INFO L380 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] [2019-11-16 00:25:58,329 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-16 00:25:58,330 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-16 00:25:58,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-16 00:25:58,330 INFO L82 PathProgramCache]: Analyzing trace with hash -434541687, now seen corresponding path program 1 times [2019-11-16 00:25:58,331 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-16 00:25:58,331 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196378173] [2019-11-16 00:25:58,331 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:25:58,331 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:25:58,331 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-16 00:25:58,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:25:58,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:25:58,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:25:58,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:25:58,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:25:58,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:25:58,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:25:58,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:25:58,635 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2019-11-16 00:25:58,635 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196378173] [2019-11-16 00:25:58,635 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2111771949] [2019-11-16 00:25:58,636 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_46a5a639-4a46-4f89-b0d8-3b37b842acf3/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 [2019-11-16 00:25:58,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:25:58,681 INFO L256 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-16 00:25:58,684 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-16 00:25:58,781 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-11-16 00:25:58,782 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-16 00:25:58,782 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9] total 18 [2019-11-16 00:25:58,782 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988569388] [2019-11-16 00:25:58,783 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-11-16 00:25:58,783 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-16 00:25:58,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-11-16 00:25:58,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2019-11-16 00:25:58,784 INFO L87 Difference]: Start difference. First operand 66 states and 96 transitions. Second operand 18 states. [2019-11-16 00:25:59,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-16 00:25:59,373 INFO L93 Difference]: Finished difference Result 164 states and 279 transitions. [2019-11-16 00:25:59,373 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-11-16 00:25:59,373 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 50 [2019-11-16 00:25:59,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-16 00:25:59,376 INFO L225 Difference]: With dead ends: 164 [2019-11-16 00:25:59,376 INFO L226 Difference]: Without dead ends: 100 [2019-11-16 00:25:59,378 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=115, Invalid=587, Unknown=0, NotChecked=0, Total=702 [2019-11-16 00:25:59,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2019-11-16 00:25:59,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 89. [2019-11-16 00:25:59,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2019-11-16 00:25:59,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 145 transitions. [2019-11-16 00:25:59,401 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 145 transitions. Word has length 50 [2019-11-16 00:25:59,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-16 00:25:59,401 INFO L462 AbstractCegarLoop]: Abstraction has 89 states and 145 transitions. [2019-11-16 00:25:59,402 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-11-16 00:25:59,402 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 145 transitions. [2019-11-16 00:25:59,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2019-11-16 00:25:59,408 INFO L372 BasicCegarLoop]: Found error trace [2019-11-16 00:25:59,408 INFO L380 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-11-16 00:25:59,614 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-16 00:25:59,617 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-16 00:25:59,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-16 00:25:59,618 INFO L82 PathProgramCache]: Analyzing trace with hash -1894743046, now seen corresponding path program 2 times [2019-11-16 00:25:59,618 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-16 00:25:59,618 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400108716] [2019-11-16 00:25:59,618 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:25:59,618 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:25:59,618 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-16 00:25:59,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:25:59,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:25:59,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:25:59,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:25:59,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:25:59,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:25:59,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:25:59,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:25:59,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:25:59,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:25:59,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:25:59,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:25:59,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:25:59,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:25:59,980 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 33 proven. 56 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2019-11-16 00:25:59,980 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400108716] [2019-11-16 00:25:59,981 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2084608727] [2019-11-16 00:25:59,981 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_46a5a639-4a46-4f89-b0d8-3b37b842acf3/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 [2019-11-16 00:26:00,057 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-16 00:26:00,057 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-16 00:26:00,058 INFO L256 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-16 00:26:00,063 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-16 00:26:00,165 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 23 proven. 64 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2019-11-16 00:26:00,166 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-16 00:26:00,166 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 9] total 19 [2019-11-16 00:26:00,166 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361322993] [2019-11-16 00:26:00,167 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-11-16 00:26:00,168 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-16 00:26:00,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-11-16 00:26:00,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2019-11-16 00:26:00,169 INFO L87 Difference]: Start difference. First operand 89 states and 145 transitions. Second operand 19 states. [2019-11-16 00:26:00,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-16 00:26:00,840 INFO L93 Difference]: Finished difference Result 204 states and 376 transitions. [2019-11-16 00:26:00,841 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-11-16 00:26:00,841 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 90 [2019-11-16 00:26:00,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-16 00:26:00,844 INFO L225 Difference]: With dead ends: 204 [2019-11-16 00:26:00,844 INFO L226 Difference]: Without dead ends: 119 [2019-11-16 00:26:00,846 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=116, Invalid=640, Unknown=0, NotChecked=0, Total=756 [2019-11-16 00:26:00,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2019-11-16 00:26:00,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 112. [2019-11-16 00:26:00,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2019-11-16 00:26:00,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 187 transitions. [2019-11-16 00:26:00,870 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 187 transitions. Word has length 90 [2019-11-16 00:26:00,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-16 00:26:00,871 INFO L462 AbstractCegarLoop]: Abstraction has 112 states and 187 transitions. [2019-11-16 00:26:00,871 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-11-16 00:26:00,871 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 187 transitions. [2019-11-16 00:26:00,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2019-11-16 00:26:00,878 INFO L372 BasicCegarLoop]: Found error trace [2019-11-16 00:26:00,879 INFO L380 BasicCegarLoop]: trace histogram [9, 9, 7, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1] [2019-11-16 00:26:01,083 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-16 00:26:01,083 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-16 00:26:01,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-16 00:26:01,084 INFO L82 PathProgramCache]: Analyzing trace with hash 2079690951, now seen corresponding path program 1 times [2019-11-16 00:26:01,084 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-16 00:26:01,084 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90658982] [2019-11-16 00:26:01,084 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:26:01,084 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:26:01,084 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-16 00:26:01,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:26:01,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:26:01,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:26:01,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:26:01,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:26:01,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:26:01,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:26:01,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:26:01,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:26:01,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:26:01,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:26:01,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:26:01,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:26:01,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:26:01,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:26:01,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:26:01,564 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 56 proven. 78 refuted. 0 times theorem prover too weak. 142 trivial. 0 not checked. [2019-11-16 00:26:01,564 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90658982] [2019-11-16 00:26:01,564 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2039080671] [2019-11-16 00:26:01,564 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_46a5a639-4a46-4f89-b0d8-3b37b842acf3/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 [2019-11-16 00:26:01,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:26:01,631 INFO L256 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-16 00:26:01,636 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-16 00:26:01,766 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 36 proven. 58 refuted. 0 times theorem prover too weak. 182 trivial. 0 not checked. [2019-11-16 00:26:01,767 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-16 00:26:01,767 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 8] total 20 [2019-11-16 00:26:01,767 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900489694] [2019-11-16 00:26:01,768 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-11-16 00:26:01,768 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-16 00:26:01,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-11-16 00:26:01,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2019-11-16 00:26:01,769 INFO L87 Difference]: Start difference. First operand 112 states and 187 transitions. Second operand 20 states. [2019-11-16 00:26:02,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-16 00:26:02,491 INFO L93 Difference]: Finished difference Result 274 states and 494 transitions. [2019-11-16 00:26:02,493 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-11-16 00:26:02,493 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 106 [2019-11-16 00:26:02,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-16 00:26:02,495 INFO L225 Difference]: With dead ends: 274 [2019-11-16 00:26:02,495 INFO L226 Difference]: Without dead ends: 167 [2019-11-16 00:26:02,497 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=104, Invalid=652, Unknown=0, NotChecked=0, Total=756 [2019-11-16 00:26:02,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2019-11-16 00:26:02,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 151. [2019-11-16 00:26:02,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2019-11-16 00:26:02,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 256 transitions. [2019-11-16 00:26:02,523 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 256 transitions. Word has length 106 [2019-11-16 00:26:02,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-16 00:26:02,524 INFO L462 AbstractCegarLoop]: Abstraction has 151 states and 256 transitions. [2019-11-16 00:26:02,524 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-11-16 00:26:02,524 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 256 transitions. [2019-11-16 00:26:02,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2019-11-16 00:26:02,527 INFO L372 BasicCegarLoop]: Found error trace [2019-11-16 00:26:02,528 INFO L380 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-11-16 00:26:02,734 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-16 00:26:02,734 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-16 00:26:02,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-16 00:26:02,735 INFO L82 PathProgramCache]: Analyzing trace with hash 1332235092, now seen corresponding path program 1 times [2019-11-16 00:26:02,735 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-16 00:26:02,735 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037544472] [2019-11-16 00:26:02,735 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:26:02,735 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:26:02,735 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-16 00:26:02,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:26:02,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:26:02,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:26:02,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:26:02,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:26:02,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:26:02,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:26:02,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:26:02,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:26:02,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:26:02,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:26:02,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:26:02,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:26:02,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:26:03,005 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 77 proven. 18 refuted. 0 times theorem prover too weak. 89 trivial. 0 not checked. [2019-11-16 00:26:03,006 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037544472] [2019-11-16 00:26:03,006 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [644310527] [2019-11-16 00:26:03,006 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_46a5a639-4a46-4f89-b0d8-3b37b842acf3/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 [2019-11-16 00:26:03,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:26:03,073 INFO L256 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-16 00:26:03,086 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-16 00:26:03,133 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 111 proven. 0 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2019-11-16 00:26:03,134 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-16 00:26:03,134 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [14] total 15 [2019-11-16 00:26:03,134 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664166983] [2019-11-16 00:26:03,135 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-16 00:26:03,135 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-16 00:26:03,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-16 00:26:03,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2019-11-16 00:26:03,135 INFO L87 Difference]: Start difference. First operand 151 states and 256 transitions. Second operand 6 states. [2019-11-16 00:26:03,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-16 00:26:03,201 INFO L93 Difference]: Finished difference Result 268 states and 495 transitions. [2019-11-16 00:26:03,202 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-16 00:26:03,202 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 90 [2019-11-16 00:26:03,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-16 00:26:03,204 INFO L225 Difference]: With dead ends: 268 [2019-11-16 00:26:03,205 INFO L226 Difference]: Without dead ends: 123 [2019-11-16 00:26:03,207 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 116 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2019-11-16 00:26:03,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2019-11-16 00:26:03,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 117. [2019-11-16 00:26:03,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2019-11-16 00:26:03,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 184 transitions. [2019-11-16 00:26:03,223 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 184 transitions. Word has length 90 [2019-11-16 00:26:03,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-16 00:26:03,224 INFO L462 AbstractCegarLoop]: Abstraction has 117 states and 184 transitions. [2019-11-16 00:26:03,224 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-16 00:26:03,224 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 184 transitions. [2019-11-16 00:26:03,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2019-11-16 00:26:03,227 INFO L372 BasicCegarLoop]: Found error trace [2019-11-16 00:26:03,228 INFO L380 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 8, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 3, 3, 1, 1, 1, 1, 1, 1] [2019-11-16 00:26:03,432 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-16 00:26:03,432 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-16 00:26:03,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-16 00:26:03,433 INFO L82 PathProgramCache]: Analyzing trace with hash -2109281695, now seen corresponding path program 2 times [2019-11-16 00:26:03,433 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-16 00:26:03,433 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814878876] [2019-11-16 00:26:03,433 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:26:03,434 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:26:03,434 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-16 00:26:03,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:26:03,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:26:03,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:26:03,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:26:03,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:26:03,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:26:03,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:26:03,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:26:03,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:26:03,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:26:03,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:26:03,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:26:03,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:26:03,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:26:03,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:26:03,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:26:03,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:26:03,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:26:03,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:26:03,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:26:04,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:26:04,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:26:04,048 INFO L134 CoverageAnalysis]: Checked inductivity of 553 backedges. 128 proven. 196 refuted. 0 times theorem prover too weak. 229 trivial. 0 not checked. [2019-11-16 00:26:04,048 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814878876] [2019-11-16 00:26:04,049 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2087554651] [2019-11-16 00:26:04,049 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_46a5a639-4a46-4f89-b0d8-3b37b842acf3/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 [2019-11-16 00:26:04,141 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-16 00:26:04,142 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-16 00:26:04,143 INFO L256 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-16 00:26:04,148 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-16 00:26:04,329 INFO L134 CoverageAnalysis]: Checked inductivity of 553 backedges. 72 proven. 118 refuted. 0 times theorem prover too weak. 363 trivial. 0 not checked. [2019-11-16 00:26:04,329 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-16 00:26:04,329 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 10] total 28 [2019-11-16 00:26:04,329 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018349925] [2019-11-16 00:26:04,330 INFO L442 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-11-16 00:26:04,331 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-16 00:26:04,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-11-16 00:26:04,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=668, Unknown=0, NotChecked=0, Total=756 [2019-11-16 00:26:04,332 INFO L87 Difference]: Start difference. First operand 117 states and 184 transitions. Second operand 28 states. [2019-11-16 00:26:05,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-16 00:26:05,431 INFO L93 Difference]: Finished difference Result 262 states and 463 transitions. [2019-11-16 00:26:05,432 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-11-16 00:26:05,432 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 147 [2019-11-16 00:26:05,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-16 00:26:05,435 INFO L225 Difference]: With dead ends: 262 [2019-11-16 00:26:05,435 INFO L226 Difference]: Without dead ends: 125 [2019-11-16 00:26:05,437 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 186 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 380 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=213, Invalid=1427, Unknown=0, NotChecked=0, Total=1640 [2019-11-16 00:26:05,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2019-11-16 00:26:05,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 97. [2019-11-16 00:26:05,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2019-11-16 00:26:05,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 132 transitions. [2019-11-16 00:26:05,464 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 132 transitions. Word has length 147 [2019-11-16 00:26:05,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-16 00:26:05,466 INFO L462 AbstractCegarLoop]: Abstraction has 97 states and 132 transitions. [2019-11-16 00:26:05,467 INFO L463 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-11-16 00:26:05,467 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 132 transitions. [2019-11-16 00:26:05,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2019-11-16 00:26:05,470 INFO L372 BasicCegarLoop]: Found error trace [2019-11-16 00:26:05,470 INFO L380 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] [2019-11-16 00:26:05,673 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-16 00:26:05,674 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-16 00:26:05,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-16 00:26:05,674 INFO L82 PathProgramCache]: Analyzing trace with hash 1882786525, now seen corresponding path program 2 times [2019-11-16 00:26:05,674 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-16 00:26:05,674 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743528075] [2019-11-16 00:26:05,675 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:26:05,675 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:26:05,675 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-16 00:26:05,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:26:05,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:26:05,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:26:05,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:26:05,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:26:05,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:26:05,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:26:05,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:26:05,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:26:05,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:26:05,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:26:05,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:26:06,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:26:06,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:26:06,046 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 60 proven. 49 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2019-11-16 00:26:06,046 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743528075] [2019-11-16 00:26:06,047 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2080659878] [2019-11-16 00:26:06,047 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_46a5a639-4a46-4f89-b0d8-3b37b842acf3/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 [2019-11-16 00:26:06,107 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-16 00:26:06,107 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-16 00:26:06,108 INFO L256 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-16 00:26:06,110 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-16 00:26:06,171 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 58 proven. 15 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2019-11-16 00:26:06,171 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-16 00:26:06,171 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 8] total 21 [2019-11-16 00:26:06,171 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36375671] [2019-11-16 00:26:06,172 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-11-16 00:26:06,172 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-16 00:26:06,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-11-16 00:26:06,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2019-11-16 00:26:06,173 INFO L87 Difference]: Start difference. First operand 97 states and 132 transitions. Second operand 21 states. [2019-11-16 00:26:06,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-16 00:26:06,516 INFO L93 Difference]: Finished difference Result 193 states and 269 transitions. [2019-11-16 00:26:06,516 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-11-16 00:26:06,517 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 91 [2019-11-16 00:26:06,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-16 00:26:06,518 INFO L225 Difference]: With dead ends: 193 [2019-11-16 00:26:06,518 INFO L226 Difference]: Without dead ends: 105 [2019-11-16 00:26:06,519 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=105, Invalid=597, Unknown=0, NotChecked=0, Total=702 [2019-11-16 00:26:06,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2019-11-16 00:26:06,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 95. [2019-11-16 00:26:06,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2019-11-16 00:26:06,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 128 transitions. [2019-11-16 00:26:06,540 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 128 transitions. Word has length 91 [2019-11-16 00:26:06,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-16 00:26:06,541 INFO L462 AbstractCegarLoop]: Abstraction has 95 states and 128 transitions. [2019-11-16 00:26:06,541 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-11-16 00:26:06,542 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 128 transitions. [2019-11-16 00:26:06,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2019-11-16 00:26:06,543 INFO L372 BasicCegarLoop]: Found error trace [2019-11-16 00:26:06,544 INFO L380 BasicCegarLoop]: trace histogram [10, 10, 7, 7, 7, 6, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-16 00:26:06,746 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-16 00:26:06,747 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-16 00:26:06,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-16 00:26:06,747 INFO L82 PathProgramCache]: Analyzing trace with hash -1800642876, now seen corresponding path program 3 times [2019-11-16 00:26:06,747 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-16 00:26:06,747 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784374435] [2019-11-16 00:26:06,748 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:26:06,748 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:26:06,748 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-16 00:26:06,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:26:06,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:26:06,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:26:06,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:26:06,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:26:06,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:26:06,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:26:06,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:26:06,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:26:06,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:26:06,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:26:06,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:26:07,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:26:07,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:26:07,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:26:07,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:26:07,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:26:07,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:26:07,189 INFO L134 CoverageAnalysis]: Checked inductivity of 352 backedges. 108 proven. 97 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2019-11-16 00:26:07,189 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784374435] [2019-11-16 00:26:07,190 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [124014013] [2019-11-16 00:26:07,190 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_46a5a639-4a46-4f89-b0d8-3b37b842acf3/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 [2019-11-16 00:26:07,270 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-11-16 00:26:07,270 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-16 00:26:07,271 INFO L256 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-16 00:26:07,274 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-16 00:26:07,367 INFO L134 CoverageAnalysis]: Checked inductivity of 352 backedges. 141 proven. 21 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2019-11-16 00:26:07,367 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-16 00:26:07,367 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 11] total 25 [2019-11-16 00:26:07,368 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562687313] [2019-11-16 00:26:07,368 INFO L442 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-11-16 00:26:07,368 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-16 00:26:07,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-11-16 00:26:07,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=512, Unknown=0, NotChecked=0, Total=600 [2019-11-16 00:26:07,369 INFO L87 Difference]: Start difference. First operand 95 states and 128 transitions. Second operand 25 states. [2019-11-16 00:26:08,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-16 00:26:08,007 INFO L93 Difference]: Finished difference Result 200 states and 296 transitions. [2019-11-16 00:26:08,007 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-11-16 00:26:08,007 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 118 [2019-11-16 00:26:08,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-16 00:26:08,009 INFO L225 Difference]: With dead ends: 200 [2019-11-16 00:26:08,009 INFO L226 Difference]: Without dead ends: 111 [2019-11-16 00:26:08,011 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 379 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=257, Invalid=1303, Unknown=0, NotChecked=0, Total=1560 [2019-11-16 00:26:08,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2019-11-16 00:26:08,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 94. [2019-11-16 00:26:08,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2019-11-16 00:26:08,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 122 transitions. [2019-11-16 00:26:08,023 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 122 transitions. Word has length 118 [2019-11-16 00:26:08,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-16 00:26:08,024 INFO L462 AbstractCegarLoop]: Abstraction has 94 states and 122 transitions. [2019-11-16 00:26:08,024 INFO L463 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-11-16 00:26:08,024 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 122 transitions. [2019-11-16 00:26:08,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2019-11-16 00:26:08,027 INFO L372 BasicCegarLoop]: Found error trace [2019-11-16 00:26:08,027 INFO L380 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] [2019-11-16 00:26:08,232 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-16 00:26:08,232 INFO L410 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-16 00:26:08,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-16 00:26:08,233 INFO L82 PathProgramCache]: Analyzing trace with hash -1335172610, now seen corresponding path program 4 times [2019-11-16 00:26:08,233 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-16 00:26:08,233 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060723525] [2019-11-16 00:26:08,233 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:26:08,233 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:26:08,234 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-16 00:26:08,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-16 00:26:08,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-16 00:26:08,305 INFO L168 tionRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-16 00:26:08,306 INFO L445 BasicCegarLoop]: Counterexample might be feasible [2019-11-16 00:26:08,368 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.11 12:26:08 BoogieIcfgContainer [2019-11-16 00:26:08,368 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-16 00:26:08,369 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-16 00:26:08,369 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-16 00:26:08,369 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-16 00:26:08,370 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 12:25:53" (3/4) ... [2019-11-16 00:26:08,372 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-11-16 00:26:08,477 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_46a5a639-4a46-4f89-b0d8-3b37b842acf3/bin/uautomizer/witness.graphml [2019-11-16 00:26:08,478 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-16 00:26:08,480 INFO L168 Benchmark]: Toolchain (without parser) took 15593.41 ms. Allocated memory was 1.0 GB in the beginning and 1.4 GB in the end (delta: 351.3 MB). Free memory was 948.4 MB in the beginning and 1.3 GB in the end (delta: -302.7 MB). Peak memory consumption was 48.6 MB. Max. memory is 11.5 GB. [2019-11-16 00:26:08,480 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 1.0 GB. Free memory is still 966.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-16 00:26:08,481 INFO L168 Benchmark]: CACSL2BoogieTranslator took 343.69 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 123.2 MB). Free memory was 947.3 MB in the beginning and 1.1 GB in the end (delta: -175.8 MB). Peak memory consumption was 20.1 MB. Max. memory is 11.5 GB. [2019-11-16 00:26:08,481 INFO L168 Benchmark]: Boogie Procedure Inliner took 34.62 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 2.8 MB). Peak memory consumption was 2.8 MB. Max. memory is 11.5 GB. [2019-11-16 00:26:08,482 INFO L168 Benchmark]: Boogie Preprocessor took 17.46 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 3.4 MB). Peak memory consumption was 3.4 MB. Max. memory is 11.5 GB. [2019-11-16 00:26:08,482 INFO L168 Benchmark]: RCFGBuilder took 268.48 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: 26.0 MB). Peak memory consumption was 26.0 MB. Max. memory is 11.5 GB. [2019-11-16 00:26:08,483 INFO L168 Benchmark]: TraceAbstraction took 14814.53 ms. Allocated memory was 1.2 GB in the beginning and 1.4 GB in the end (delta: 228.1 MB). Free memory was 1.1 GB in the beginning and 1.3 GB in the end (delta: -163.9 MB). Peak memory consumption was 64.1 MB. Max. memory is 11.5 GB. [2019-11-16 00:26:08,484 INFO L168 Benchmark]: Witness Printer took 109.12 ms. Allocated memory is still 1.4 GB. Free memory was 1.3 GB in the beginning and 1.3 GB in the end (delta: 3.7 MB). Peak memory consumption was 3.7 MB. Max. memory is 11.5 GB. [2019-11-16 00:26:08,486 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 1.0 GB. Free memory is still 966.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 343.69 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 123.2 MB). Free memory was 947.3 MB in the beginning and 1.1 GB in the end (delta: -175.8 MB). Peak memory consumption was 20.1 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 34.62 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 2.8 MB). Peak memory consumption was 2.8 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 17.46 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 3.4 MB). Peak memory consumption was 3.4 MB. Max. memory is 11.5 GB. * RCFGBuilder took 268.48 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: 26.0 MB). Peak memory consumption was 26.0 MB. Max. memory is 11.5 GB. * TraceAbstraction took 14814.53 ms. Allocated memory was 1.2 GB in the beginning and 1.4 GB in the end (delta: 228.1 MB). Free memory was 1.1 GB in the beginning and 1.3 GB in the end (delta: -163.9 MB). Peak memory consumption was 64.1 MB. Max. memory is 11.5 GB. * Witness Printer took 109.12 ms. Allocated memory is still 1.4 GB. Free memory was 1.3 GB in the beginning and 1.3 GB in the end (delta: 3.7 MB). Peak memory consumption was 3.7 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 39]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L36] int x = 5; [L37] CALL, EXPR fibo1(x) VAL [\old(n)=5] [L8] COND FALSE !(n < 1) VAL [\old(n)=5, n=5] [L10] COND FALSE !(n == 1) VAL [\old(n)=5, n=5] [L13] CALL, EXPR fibo2(n-1) VAL [\old(n)=4] [L18] COND FALSE !(n < 1) VAL [\old(n)=4, n=4] [L20] COND FALSE !(n == 1) VAL [\old(n)=4, n=4] [L23] CALL, EXPR fibo1(n-1) VAL [\old(n)=3] [L8] COND FALSE !(n < 1) VAL [\old(n)=3, n=3] [L10] COND FALSE !(n == 1) VAL [\old(n)=3, n=3] [L13] CALL, EXPR fibo2(n-1) VAL [\old(n)=2] [L18] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L20] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L23] CALL, EXPR fibo1(n-1) VAL [\old(n)=1] [L8] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L10] COND TRUE n == 1 [L11] return 1; VAL [\old(n)=1, \result=1, n=1] [L23] RET, EXPR fibo1(n-1) VAL [\old(n)=2, fibo1(n-1)=1, n=2] [L23] CALL, EXPR fibo1(n-2) VAL [\old(n)=0] [L8] COND TRUE n < 1 [L9] return 0; VAL [\old(n)=0, \result=0, n=0] [L23] RET, EXPR fibo1(n-2) VAL [\old(n)=2, fibo1(n-1)=1, fibo1(n-2)=0, n=2] [L23] return fibo1(n-1) + fibo1(n-2); [L13] RET, EXPR fibo2(n-1) VAL [\old(n)=3, fibo2(n-1)=1, n=3] [L13] CALL, EXPR fibo2(n-2) VAL [\old(n)=1] [L18] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L20] COND TRUE n == 1 [L21] return 1; VAL [\old(n)=1, \result=1, n=1] [L13] RET, EXPR fibo2(n-2) VAL [\old(n)=3, fibo2(n-1)=1, fibo2(n-2)=1, n=3] [L13] return fibo2(n-1) + fibo2(n-2); [L23] RET, EXPR fibo1(n-1) VAL [\old(n)=4, fibo1(n-1)=2, n=4] [L23] CALL, EXPR fibo1(n-2) VAL [\old(n)=2] [L8] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L10] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L13] CALL, EXPR fibo2(n-1) VAL [\old(n)=1] [L18] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L20] COND TRUE n == 1 [L21] return 1; VAL [\old(n)=1, \result=1, n=1] [L13] RET, EXPR fibo2(n-1) VAL [\old(n)=2, fibo2(n-1)=1, n=2] [L13] CALL, EXPR fibo2(n-2) VAL [\old(n)=0] [L18] COND TRUE n < 1 [L19] return 0; VAL [\old(n)=0, \result=0, n=0] [L13] RET, EXPR fibo2(n-2) VAL [\old(n)=2, fibo2(n-1)=1, fibo2(n-2)=0, n=2] [L13] return fibo2(n-1) + fibo2(n-2); [L23] RET, EXPR fibo1(n-2) VAL [\old(n)=4, fibo1(n-1)=2, fibo1(n-2)=1, n=4] [L23] return fibo1(n-1) + fibo1(n-2); [L13] RET, EXPR fibo2(n-1) VAL [\old(n)=5, fibo2(n-1)=3, n=5] [L13] CALL, EXPR fibo2(n-2) VAL [\old(n)=3] [L18] COND FALSE !(n < 1) VAL [\old(n)=3, n=3] [L20] COND FALSE !(n == 1) VAL [\old(n)=3, n=3] [L23] CALL, EXPR fibo1(n-1) VAL [\old(n)=2] [L8] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L10] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L13] CALL, EXPR fibo2(n-1) VAL [\old(n)=1] [L18] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L20] COND TRUE n == 1 [L21] return 1; VAL [\old(n)=1, \result=1, n=1] [L13] RET, EXPR fibo2(n-1) VAL [\old(n)=2, fibo2(n-1)=1, n=2] [L13] CALL, EXPR fibo2(n-2) VAL [\old(n)=0] [L18] COND TRUE n < 1 [L19] return 0; VAL [\old(n)=0, \result=0, n=0] [L13] RET, EXPR fibo2(n-2) VAL [\old(n)=2, fibo2(n-1)=1, fibo2(n-2)=0, n=2] [L13] return fibo2(n-1) + fibo2(n-2); [L23] RET, EXPR fibo1(n-1) VAL [\old(n)=3, fibo1(n-1)=1, n=3] [L23] CALL, EXPR fibo1(n-2) VAL [\old(n)=1] [L8] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L10] COND TRUE n == 1 [L11] return 1; VAL [\old(n)=1, \result=1, n=1] [L23] RET, EXPR fibo1(n-2) VAL [\old(n)=3, fibo1(n-1)=1, fibo1(n-2)=1, n=3] [L23] return fibo1(n-1) + fibo1(n-2); [L13] RET, EXPR fibo2(n-2) VAL [\old(n)=5, fibo2(n-1)=3, fibo2(n-2)=2, n=5] [L13] return fibo2(n-1) + fibo2(n-2); [L37] RET, EXPR fibo1(x) [L37] int result = fibo1(x); [L38] COND TRUE result == 5 [L39] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 28 locations, 1 error locations. Result: UNSAFE, OverallTime: 14.7s, OverallIterations: 14, TraceHistogramMax: 11, AutomataDifference: 5.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 326 SDtfs, 687 SDslu, 2531 SDs, 0 SdLazy, 4414 SolverSat, 649 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 3.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1292 GetRequests, 1024 SyntacticMatches, 4 SemanticMatches, 264 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1277 ImplicationChecksByTransitivity, 4.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=151occurred in iteration=9, 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, 121 StatesRemovedByMinimization, 12 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 4.8s InterpolantComputationTime, 1740 NumberOfCodeBlocks, 1679 NumberOfCodeBlocksAsserted, 30 NumberOfCheckSat, 1611 ConstructedInterpolants, 0 QuantifiedInterpolants, 275045 SizeOfPredicates, 44 NumberOfNonLiveVariables, 1691 ConjunctsInSsa, 90 ConjunctsInUnsatCore, 24 InterpolantComputations, 3 PerfectInterpolantSequences, 2803/3648 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...