./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive-simple/fibo_2calls_5-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cad46833 Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_8d53e24a-1332-4199-a38a-d4b631565f2b/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_8d53e24a-1332-4199-a38a-d4b631565f2b/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_8d53e24a-1332-4199-a38a-d4b631565f2b/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_8d53e24a-1332-4199-a38a-d4b631565f2b/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive-simple/fibo_2calls_5-1.c -s /tmp/vcloud-vcloud-master/worker/run_dir_8d53e24a-1332-4199-a38a-d4b631565f2b/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_8d53e24a-1332-4199-a38a-d4b631565f2b/bin/uautomizer --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash e6092b6e2bef07c2401a6d2b7c5ee309bc5dbc34 .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.24-cad4683 [2019-11-15 23:15:23,896 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-15 23:15:23,897 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-15 23:15:23,909 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-15 23:15:23,909 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-15 23:15:23,911 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-15 23:15:23,912 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-15 23:15:23,915 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-15 23:15:23,917 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-15 23:15:23,918 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-15 23:15:23,919 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-15 23:15:23,921 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-15 23:15:23,921 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-15 23:15:23,922 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-15 23:15:23,923 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-15 23:15:23,924 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-15 23:15:23,925 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-15 23:15:23,926 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-15 23:15:23,928 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-15 23:15:23,931 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-15 23:15:23,935 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-15 23:15:23,939 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-15 23:15:23,941 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-15 23:15:23,943 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-15 23:15:23,948 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-15 23:15:23,949 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-15 23:15:23,949 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-15 23:15:23,952 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-15 23:15:23,952 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-15 23:15:23,955 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-15 23:15:23,955 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-15 23:15:23,956 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-15 23:15:23,956 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-15 23:15:23,957 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-15 23:15:23,959 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-15 23:15:23,959 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-15 23:15:23,960 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-15 23:15:23,961 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-15 23:15:23,961 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-15 23:15:23,964 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-15 23:15:23,965 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-15 23:15:23,966 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_8d53e24a-1332-4199-a38a-d4b631565f2b/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-15 23:15:23,988 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-15 23:15:23,988 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-15 23:15:23,990 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-15 23:15:23,990 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-15 23:15:23,990 INFO L138 SettingsManager]: * Use SBE=true [2019-11-15 23:15:23,991 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-15 23:15:23,991 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-15 23:15:23,991 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-15 23:15:23,992 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-15 23:15:23,992 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-15 23:15:23,993 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-15 23:15:23,994 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-15 23:15:23,994 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-15 23:15:23,995 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-15 23:15:23,995 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-15 23:15:23,995 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-15 23:15:23,996 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-15 23:15:23,996 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-15 23:15:23,996 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-15 23:15:23,997 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-15 23:15:23,997 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-15 23:15:23,997 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-15 23:15:23,998 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-15 23:15:23,998 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-15 23:15:23,998 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-15 23:15:23,999 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-15 23:15:23,999 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-15 23:15:23,999 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-15 23:15:24,000 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_8d53e24a-1332-4199-a38a-d4b631565f2b/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e6092b6e2bef07c2401a6d2b7c5ee309bc5dbc34 [2019-11-15 23:15:24,073 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-15 23:15:24,086 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-15 23:15:24,089 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-15 23:15:24,092 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-15 23:15:24,093 INFO L275 PluginConnector]: CDTParser initialized [2019-11-15 23:15:24,094 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_8d53e24a-1332-4199-a38a-d4b631565f2b/bin/uautomizer/../../sv-benchmarks/c/recursive-simple/fibo_2calls_5-1.c [2019-11-15 23:15:24,167 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_8d53e24a-1332-4199-a38a-d4b631565f2b/bin/uautomizer/data/09c6124ef/910feccc46174871becb38e0bd531214/FLAG273cb4ce7 [2019-11-15 23:15:24,622 INFO L306 CDTParser]: Found 1 translation units. [2019-11-15 23:15:24,622 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_8d53e24a-1332-4199-a38a-d4b631565f2b/sv-benchmarks/c/recursive-simple/fibo_2calls_5-1.c [2019-11-15 23:15:24,629 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_8d53e24a-1332-4199-a38a-d4b631565f2b/bin/uautomizer/data/09c6124ef/910feccc46174871becb38e0bd531214/FLAG273cb4ce7 [2019-11-15 23:15:25,048 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_8d53e24a-1332-4199-a38a-d4b631565f2b/bin/uautomizer/data/09c6124ef/910feccc46174871becb38e0bd531214 [2019-11-15 23:15:25,051 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-15 23:15:25,053 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-15 23:15:25,054 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-15 23:15:25,054 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-15 23:15:25,058 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-15 23:15:25,061 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.11 11:15:25" (1/1) ... [2019-11-15 23:15:25,063 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1426559a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 11:15:25, skipping insertion in model container [2019-11-15 23:15:25,063 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.11 11:15:25" (1/1) ... [2019-11-15 23:15:25,074 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-15 23:15:25,087 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-15 23:15:25,341 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-15 23:15:25,353 INFO L188 MainTranslator]: Completed pre-run [2019-11-15 23:15:25,373 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-15 23:15:25,388 INFO L192 MainTranslator]: Completed translation [2019-11-15 23:15:25,389 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 11:15:25 WrapperNode [2019-11-15 23:15:25,390 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-15 23:15:25,391 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-15 23:15:25,391 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-15 23:15:25,391 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-15 23:15:25,401 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 11:15:25" (1/1) ... [2019-11-15 23:15:25,407 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 11:15:25" (1/1) ... [2019-11-15 23:15:25,425 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-15 23:15:25,427 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-15 23:15:25,427 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-15 23:15:25,428 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-15 23:15:25,437 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 11:15:25" (1/1) ... [2019-11-15 23:15:25,438 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 11:15:25" (1/1) ... [2019-11-15 23:15:25,439 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 11:15:25" (1/1) ... [2019-11-15 23:15:25,439 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 11:15:25" (1/1) ... [2019-11-15 23:15:25,442 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 11:15:25" (1/1) ... [2019-11-15 23:15:25,445 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 11:15:25" (1/1) ... [2019-11-15 23:15:25,453 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 11:15:25" (1/1) ... [2019-11-15 23:15:25,454 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-15 23:15:25,455 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-15 23:15:25,455 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-15 23:15:25,455 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-15 23:15:25,457 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 11:15:25" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8d53e24a-1332-4199-a38a-d4b631565f2b/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 [2019-11-15 23:15:25,537 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-15 23:15:25,537 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-15 23:15:25,537 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2019-11-15 23:15:25,538 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2019-11-15 23:15:25,539 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2019-11-15 23:15:25,539 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2019-11-15 23:15:25,735 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-15 23:15:25,735 INFO L284 CfgBuilder]: Removed 4 assume(true) statements. [2019-11-15 23:15:25,736 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.11 11:15:25 BoogieIcfgContainer [2019-11-15 23:15:25,736 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-15 23:15:25,737 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-15 23:15:25,737 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-15 23:15:25,740 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-15 23:15:25,740 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.11 11:15:25" (1/3) ... [2019-11-15 23:15:25,744 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6cc1fbd7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.11 11:15:25, skipping insertion in model container [2019-11-15 23:15:25,744 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 11:15:25" (2/3) ... [2019-11-15 23:15:25,744 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6cc1fbd7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.11 11:15:25, skipping insertion in model container [2019-11-15 23:15:25,745 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.11 11:15:25" (3/3) ... [2019-11-15 23:15:25,746 INFO L109 eAbstractionObserver]: Analyzing ICFG fibo_2calls_5-1.c [2019-11-15 23:15:25,769 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-15 23:15:25,776 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-15 23:15:25,810 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-15 23:15:25,848 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-15 23:15:25,849 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-15 23:15:25,849 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-15 23:15:25,849 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-15 23:15:25,849 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-15 23:15:25,849 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-15 23:15:25,850 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-15 23:15:25,850 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-15 23:15:25,866 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states. [2019-11-15 23:15:25,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-11-15 23:15:25,872 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 23:15:25,874 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 23:15:25,876 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 23:15:25,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 23:15:25,884 INFO L82 PathProgramCache]: Analyzing trace with hash 1871295635, now seen corresponding path program 1 times [2019-11-15 23:15:25,894 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 23:15:25,895 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064652350] [2019-11-15 23:15:25,895 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:15:25,895 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:15:25,896 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 23:15:25,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:15:26,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:15:26,084 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 23:15:26,085 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064652350] [2019-11-15 23:15:26,086 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-15 23:15:26,086 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-15 23:15:26,086 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173313994] [2019-11-15 23:15:26,090 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-15 23:15:26,091 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 23:15:26,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-15 23:15:26,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-15 23:15:26,106 INFO L87 Difference]: Start difference. First operand 28 states. Second operand 5 states. [2019-11-15 23:15:26,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 23:15:26,212 INFO L93 Difference]: Finished difference Result 38 states and 47 transitions. [2019-11-15 23:15:26,212 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-15 23:15:26,214 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2019-11-15 23:15:26,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 23:15:26,224 INFO L225 Difference]: With dead ends: 38 [2019-11-15 23:15:26,224 INFO L226 Difference]: Without dead ends: 26 [2019-11-15 23:15:26,227 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-15 23:15:26,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-11-15 23:15:26,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2019-11-15 23:15:26,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-11-15 23:15:26,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 33 transitions. [2019-11-15 23:15:26,267 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 33 transitions. Word has length 9 [2019-11-15 23:15:26,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 23:15:26,268 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 33 transitions. [2019-11-15 23:15:26,268 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-15 23:15:26,268 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 33 transitions. [2019-11-15 23:15:26,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-15 23:15:26,269 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 23:15:26,270 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 23:15:26,270 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 23:15:26,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 23:15:26,270 INFO L82 PathProgramCache]: Analyzing trace with hash -1404217650, now seen corresponding path program 1 times [2019-11-15 23:15:26,271 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 23:15:26,271 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764326527] [2019-11-15 23:15:26,271 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:15:26,271 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:15:26,271 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 23:15:26,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:15:26,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:15:26,334 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 23:15:26,334 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764326527] [2019-11-15 23:15:26,334 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-15 23:15:26,335 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-15 23:15:26,335 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288378680] [2019-11-15 23:15:26,336 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-15 23:15:26,336 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 23:15:26,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-15 23:15:26,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-15 23:15:26,337 INFO L87 Difference]: Start difference. First operand 26 states and 33 transitions. Second operand 5 states. [2019-11-15 23:15:26,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 23:15:26,419 INFO L93 Difference]: Finished difference Result 32 states and 40 transitions. [2019-11-15 23:15:26,419 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-15 23:15:26,420 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2019-11-15 23:15:26,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 23:15:26,421 INFO L225 Difference]: With dead ends: 32 [2019-11-15 23:15:26,421 INFO L226 Difference]: Without dead ends: 28 [2019-11-15 23:15:26,422 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-15 23:15:26,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-11-15 23:15:26,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 26. [2019-11-15 23:15:26,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-11-15 23:15:26,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 33 transitions. [2019-11-15 23:15:26,430 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 33 transitions. Word has length 10 [2019-11-15 23:15:26,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 23:15:26,431 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 33 transitions. [2019-11-15 23:15:26,431 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-15 23:15:26,431 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 33 transitions. [2019-11-15 23:15:26,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-11-15 23:15:26,432 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 23:15:26,433 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 23:15:26,433 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 23:15:26,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 23:15:26,433 INFO L82 PathProgramCache]: Analyzing trace with hash -1629927371, now seen corresponding path program 1 times [2019-11-15 23:15:26,433 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 23:15:26,434 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529653293] [2019-11-15 23:15:26,434 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:15:26,434 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:15:26,434 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 23:15:26,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:15:26,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:15:26,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:15:26,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:15:26,560 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-15 23:15:26,560 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529653293] [2019-11-15 23:15:26,561 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2025810905] [2019-11-15 23:15:26,561 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8d53e24a-1332-4199-a38a-d4b631565f2b/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 [2019-11-15 23:15:26,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:15:26,610 INFO L256 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-15 23:15:26,616 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 23:15:26,687 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-15 23:15:26,688 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 23:15:26,688 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2019-11-15 23:15:26,688 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909211005] [2019-11-15 23:15:26,690 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-15 23:15:26,697 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 23:15:26,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-15 23:15:26,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2019-11-15 23:15:26,698 INFO L87 Difference]: Start difference. First operand 26 states and 33 transitions. Second operand 10 states. [2019-11-15 23:15:26,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 23:15:26,892 INFO L93 Difference]: Finished difference Result 59 states and 83 transitions. [2019-11-15 23:15:26,893 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-15 23:15:26,893 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 22 [2019-11-15 23:15:26,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 23:15:26,895 INFO L225 Difference]: With dead ends: 59 [2019-11-15 23:15:26,895 INFO L226 Difference]: Without dead ends: 35 [2019-11-15 23:15:26,896 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2019-11-15 23:15:26,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-11-15 23:15:26,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 33. [2019-11-15 23:15:26,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-11-15 23:15:26,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 42 transitions. [2019-11-15 23:15:26,905 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 42 transitions. Word has length 22 [2019-11-15 23:15:26,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 23:15:26,906 INFO L462 AbstractCegarLoop]: Abstraction has 33 states and 42 transitions. [2019-11-15 23:15:26,906 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-15 23:15:26,906 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 42 transitions. [2019-11-15 23:15:26,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-11-15 23:15:26,909 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 23:15:26,909 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] [2019-11-15 23:15:27,116 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 23:15:27,116 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 23:15:27,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 23:15:27,117 INFO L82 PathProgramCache]: Analyzing trace with hash 1285987244, now seen corresponding path program 1 times [2019-11-15 23:15:27,117 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 23:15:27,117 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256937903] [2019-11-15 23:15:27,118 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:15:27,118 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:15:27,118 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 23:15:27,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:15:27,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:15:27,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:15:27,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:15:27,248 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-15 23:15:27,248 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256937903] [2019-11-15 23:15:27,249 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1864439618] [2019-11-15 23:15:27,249 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8d53e24a-1332-4199-a38a-d4b631565f2b/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 [2019-11-15 23:15:27,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:15:27,280 INFO L256 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-15 23:15:27,281 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 23:15:27,309 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-15 23:15:27,309 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 23:15:27,309 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2019-11-15 23:15:27,310 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623592743] [2019-11-15 23:15:27,310 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-15 23:15:27,310 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 23:15:27,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-15 23:15:27,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2019-11-15 23:15:27,311 INFO L87 Difference]: Start difference. First operand 33 states and 42 transitions. Second operand 10 states. [2019-11-15 23:15:27,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 23:15:27,534 INFO L93 Difference]: Finished difference Result 55 states and 78 transitions. [2019-11-15 23:15:27,534 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-15 23:15:27,535 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 23 [2019-11-15 23:15:27,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 23:15:27,538 INFO L225 Difference]: With dead ends: 55 [2019-11-15 23:15:27,538 INFO L226 Difference]: Without dead ends: 51 [2019-11-15 23:15:27,539 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2019-11-15 23:15:27,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2019-11-15 23:15:27,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 48. [2019-11-15 23:15:27,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2019-11-15 23:15:27,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 68 transitions. [2019-11-15 23:15:27,552 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 68 transitions. Word has length 23 [2019-11-15 23:15:27,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 23:15:27,552 INFO L462 AbstractCegarLoop]: Abstraction has 48 states and 68 transitions. [2019-11-15 23:15:27,553 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-15 23:15:27,553 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 68 transitions. [2019-11-15 23:15:27,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2019-11-15 23:15:27,555 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 23:15:27,555 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] [2019-11-15 23:15:27,759 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 23:15:27,760 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 23:15:27,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 23:15:27,760 INFO L82 PathProgramCache]: Analyzing trace with hash -649262923, now seen corresponding path program 1 times [2019-11-15 23:15:27,761 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 23:15:27,761 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333711483] [2019-11-15 23:15:27,761 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:15:27,761 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:15:27,761 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 23:15:27,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:15:27,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:15:27,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:15:27,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:15:27,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:15:27,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:15:27,920 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-15 23:15:27,920 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333711483] [2019-11-15 23:15:27,920 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [542463591] [2019-11-15 23:15:27,920 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8d53e24a-1332-4199-a38a-d4b631565f2b/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 [2019-11-15 23:15:27,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:15:27,963 INFO L256 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-15 23:15:27,965 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 23:15:28,045 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-15 23:15:28,046 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 23:15:28,046 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2019-11-15 23:15:28,046 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636684343] [2019-11-15 23:15:28,047 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-15 23:15:28,047 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 23:15:28,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-15 23:15:28,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2019-11-15 23:15:28,047 INFO L87 Difference]: Start difference. First operand 48 states and 68 transitions. Second operand 12 states. [2019-11-15 23:15:28,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 23:15:28,438 INFO L93 Difference]: Finished difference Result 114 states and 187 transitions. [2019-11-15 23:15:28,439 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-11-15 23:15:28,439 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 35 [2019-11-15 23:15:28,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 23:15:28,441 INFO L225 Difference]: With dead ends: 114 [2019-11-15 23:15:28,442 INFO L226 Difference]: Without dead ends: 68 [2019-11-15 23:15:28,443 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=78, Invalid=302, Unknown=0, NotChecked=0, Total=380 [2019-11-15 23:15:28,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2019-11-15 23:15:28,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 66. [2019-11-15 23:15:28,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2019-11-15 23:15:28,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 98 transitions. [2019-11-15 23:15:28,459 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 98 transitions. Word has length 35 [2019-11-15 23:15:28,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 23:15:28,460 INFO L462 AbstractCegarLoop]: Abstraction has 66 states and 98 transitions. [2019-11-15 23:15:28,460 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-15 23:15:28,460 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 98 transitions. [2019-11-15 23:15:28,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2019-11-15 23:15:28,463 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 23:15:28,463 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] [2019-11-15 23:15:28,666 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 23:15:28,667 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 23:15:28,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 23:15:28,667 INFO L82 PathProgramCache]: Analyzing trace with hash 2000747716, now seen corresponding path program 1 times [2019-11-15 23:15:28,667 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 23:15:28,667 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125611170] [2019-11-15 23:15:28,668 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:15:28,668 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:15:28,668 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 23:15:28,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:15:28,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:15:28,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:15:28,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:15:28,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:15:28,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:15:28,815 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-11-15 23:15:28,816 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125611170] [2019-11-15 23:15:28,816 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1220037665] [2019-11-15 23:15:28,816 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8d53e24a-1332-4199-a38a-d4b631565f2b/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 [2019-11-15 23:15:28,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:15:28,859 INFO L256 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-15 23:15:28,863 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 23:15:28,926 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-15 23:15:28,926 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 23:15:28,927 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 12 [2019-11-15 23:15:28,927 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940798565] [2019-11-15 23:15:28,927 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-15 23:15:28,928 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 23:15:28,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-15 23:15:28,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2019-11-15 23:15:28,928 INFO L87 Difference]: Start difference. First operand 66 states and 98 transitions. Second operand 12 states. [2019-11-15 23:15:29,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 23:15:29,253 INFO L93 Difference]: Finished difference Result 147 states and 239 transitions. [2019-11-15 23:15:29,254 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-15 23:15:29,255 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 36 [2019-11-15 23:15:29,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 23:15:29,257 INFO L225 Difference]: With dead ends: 147 [2019-11-15 23:15:29,257 INFO L226 Difference]: Without dead ends: 83 [2019-11-15 23:15:29,259 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2019-11-15 23:15:29,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2019-11-15 23:15:29,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 66. [2019-11-15 23:15:29,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2019-11-15 23:15:29,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 96 transitions. [2019-11-15 23:15:29,274 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 96 transitions. Word has length 36 [2019-11-15 23:15:29,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 23:15:29,275 INFO L462 AbstractCegarLoop]: Abstraction has 66 states and 96 transitions. [2019-11-15 23:15:29,275 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-15 23:15:29,275 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 96 transitions. [2019-11-15 23:15:29,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2019-11-15 23:15:29,278 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 23:15:29,278 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] [2019-11-15 23:15:29,485 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 23:15:29,485 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 23:15:29,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 23:15:29,485 INFO L82 PathProgramCache]: Analyzing trace with hash -434541687, now seen corresponding path program 1 times [2019-11-15 23:15:29,485 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 23:15:29,486 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608481919] [2019-11-15 23:15:29,486 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:15:29,486 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:15:29,486 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 23:15:29,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:15:29,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:15:29,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:15:29,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:15:29,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:15:29,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:15:29,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:15:29,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:15:29,673 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2019-11-15 23:15:29,673 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608481919] [2019-11-15 23:15:29,673 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [294615768] [2019-11-15 23:15:29,673 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8d53e24a-1332-4199-a38a-d4b631565f2b/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 [2019-11-15 23:15:29,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:15:29,708 INFO L256 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-15 23:15:29,710 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 23:15:29,788 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-11-15 23:15:29,788 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 23:15:29,789 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 16 [2019-11-15 23:15:29,789 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364919663] [2019-11-15 23:15:29,790 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-11-15 23:15:29,790 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 23:15:29,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-11-15 23:15:29,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2019-11-15 23:15:29,790 INFO L87 Difference]: Start difference. First operand 66 states and 96 transitions. Second operand 16 states. [2019-11-15 23:15:30,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 23:15:30,349 INFO L93 Difference]: Finished difference Result 164 states and 279 transitions. [2019-11-15 23:15:30,349 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-11-15 23:15:30,350 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 50 [2019-11-15 23:15:30,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 23:15:30,352 INFO L225 Difference]: With dead ends: 164 [2019-11-15 23:15:30,352 INFO L226 Difference]: Without dead ends: 100 [2019-11-15 23:15:30,354 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=111, Invalid=489, Unknown=0, NotChecked=0, Total=600 [2019-11-15 23:15:30,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2019-11-15 23:15:30,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 89. [2019-11-15 23:15:30,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2019-11-15 23:15:30,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 145 transitions. [2019-11-15 23:15:30,371 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 145 transitions. Word has length 50 [2019-11-15 23:15:30,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 23:15:30,372 INFO L462 AbstractCegarLoop]: Abstraction has 89 states and 145 transitions. [2019-11-15 23:15:30,372 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-11-15 23:15:30,372 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 145 transitions. [2019-11-15 23:15:30,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2019-11-15 23:15:30,380 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 23:15:30,380 INFO L380 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 23:15:30,580 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 23:15:30,581 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 23:15:30,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 23:15:30,581 INFO L82 PathProgramCache]: Analyzing trace with hash -1917551255, now seen corresponding path program 1 times [2019-11-15 23:15:30,581 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 23:15:30,581 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606690755] [2019-11-15 23:15:30,581 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:15:30,582 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:15:30,582 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 23:15:30,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:15:30,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:15:30,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:15:30,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:15:30,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:15:30,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:15:30,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:15:30,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:15:30,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:15:30,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:15:30,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:15:30,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:15:30,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:15:30,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:15:30,872 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 33 proven. 58 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2019-11-15 23:15:30,872 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606690755] [2019-11-15 23:15:30,872 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [161119162] [2019-11-15 23:15:30,873 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8d53e24a-1332-4199-a38a-d4b631565f2b/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 [2019-11-15 23:15:30,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:15:30,935 INFO L256 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-15 23:15:30,940 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 23:15:31,037 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 23 proven. 65 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2019-11-15 23:15:31,038 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 23:15:31,038 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 17 [2019-11-15 23:15:31,039 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755064578] [2019-11-15 23:15:31,040 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-11-15 23:15:31,040 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 23:15:31,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-11-15 23:15:31,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2019-11-15 23:15:31,046 INFO L87 Difference]: Start difference. First operand 89 states and 145 transitions. Second operand 17 states. [2019-11-15 23:15:31,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 23:15:31,615 INFO L93 Difference]: Finished difference Result 222 states and 415 transitions. [2019-11-15 23:15:31,616 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-11-15 23:15:31,616 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 91 [2019-11-15 23:15:31,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 23:15:31,619 INFO L225 Difference]: With dead ends: 222 [2019-11-15 23:15:31,619 INFO L226 Difference]: Without dead ends: 138 [2019-11-15 23:15:31,621 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=112, Invalid=538, Unknown=0, NotChecked=0, Total=650 [2019-11-15 23:15:31,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2019-11-15 23:15:31,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 112. [2019-11-15 23:15:31,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2019-11-15 23:15:31,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 186 transitions. [2019-11-15 23:15:31,672 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 186 transitions. Word has length 91 [2019-11-15 23:15:31,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 23:15:31,673 INFO L462 AbstractCegarLoop]: Abstraction has 112 states and 186 transitions. [2019-11-15 23:15:31,673 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-11-15 23:15:31,673 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 186 transitions. [2019-11-15 23:15:31,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2019-11-15 23:15:31,680 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 23:15:31,681 INFO L380 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 8, 7, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 23:15:31,886 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 23:15:31,886 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 23:15:31,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 23:15:31,886 INFO L82 PathProgramCache]: Analyzing trace with hash -590215841, now seen corresponding path program 2 times [2019-11-15 23:15:31,886 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 23:15:31,886 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079892815] [2019-11-15 23:15:31,886 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:15:31,887 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:15:31,887 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 23:15:31,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:15:31,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:15:32,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:15:32,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:15:32,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:15:32,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:15:32,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:15:32,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:15:32,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:15:32,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:15:32,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:15:32,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:15:32,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:15:32,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:15:32,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:15:32,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:15:32,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:15:32,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:15:32,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:15:32,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:15:32,426 INFO L134 CoverageAnalysis]: Checked inductivity of 437 backedges. 100 proven. 152 refuted. 0 times theorem prover too weak. 185 trivial. 0 not checked. [2019-11-15 23:15:32,426 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079892815] [2019-11-15 23:15:32,426 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1824056624] [2019-11-15 23:15:32,426 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8d53e24a-1332-4199-a38a-d4b631565f2b/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 [2019-11-15 23:15:32,507 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-15 23:15:32,507 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-15 23:15:32,509 INFO L256 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-15 23:15:32,524 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 23:15:32,696 INFO L134 CoverageAnalysis]: Checked inductivity of 437 backedges. 81 proven. 83 refuted. 0 times theorem prover too weak. 273 trivial. 0 not checked. [2019-11-15 23:15:32,696 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 23:15:32,696 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 10] total 26 [2019-11-15 23:15:32,696 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338975508] [2019-11-15 23:15:32,700 INFO L442 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-11-15 23:15:32,701 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 23:15:32,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-11-15 23:15:32,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=563, Unknown=0, NotChecked=0, Total=650 [2019-11-15 23:15:32,701 INFO L87 Difference]: Start difference. First operand 112 states and 186 transitions. Second operand 26 states. [2019-11-15 23:15:33,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 23:15:33,862 INFO L93 Difference]: Finished difference Result 285 states and 569 transitions. [2019-11-15 23:15:33,862 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2019-11-15 23:15:33,862 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 132 [2019-11-15 23:15:33,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 23:15:33,864 INFO L225 Difference]: With dead ends: 285 [2019-11-15 23:15:33,864 INFO L226 Difference]: Without dead ends: 105 [2019-11-15 23:15:33,867 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 420 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=244, Invalid=1478, Unknown=0, NotChecked=0, Total=1722 [2019-11-15 23:15:33,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2019-11-15 23:15:33,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 83. [2019-11-15 23:15:33,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2019-11-15 23:15:33,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 108 transitions. [2019-11-15 23:15:33,891 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 108 transitions. Word has length 132 [2019-11-15 23:15:33,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 23:15:33,894 INFO L462 AbstractCegarLoop]: Abstraction has 83 states and 108 transitions. [2019-11-15 23:15:33,894 INFO L463 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-11-15 23:15:33,894 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 108 transitions. [2019-11-15 23:15:33,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2019-11-15 23:15:33,896 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 23:15:33,897 INFO L380 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 7, 7, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 23:15:34,101 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 23:15:34,101 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 23:15:34,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 23:15:34,101 INFO L82 PathProgramCache]: Analyzing trace with hash 350372983, now seen corresponding path program 3 times [2019-11-15 23:15:34,101 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 23:15:34,102 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071945296] [2019-11-15 23:15:34,102 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:15:34,102 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:15:34,102 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 23:15:34,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:15:34,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:15:34,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:15:34,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:15:34,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:15:34,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:15:34,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:15:34,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:15:34,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:15:34,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:15:34,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:15:34,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:15:34,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:15:34,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:15:34,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:15:34,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:15:34,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:15:34,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:15:34,494 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 105 proven. 103 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2019-11-15 23:15:34,494 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071945296] [2019-11-15 23:15:34,494 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [784877494] [2019-11-15 23:15:34,495 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8d53e24a-1332-4199-a38a-d4b631565f2b/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 [2019-11-15 23:15:34,544 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2019-11-15 23:15:34,544 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-15 23:15:34,545 INFO L256 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-15 23:15:34,549 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 23:15:34,636 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 139 proven. 18 refuted. 0 times theorem prover too weak. 189 trivial. 0 not checked. [2019-11-15 23:15:34,637 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 23:15:34,637 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 10] total 23 [2019-11-15 23:15:34,637 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524035160] [2019-11-15 23:15:34,638 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-11-15 23:15:34,638 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 23:15:34,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-11-15 23:15:34,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2019-11-15 23:15:34,639 INFO L87 Difference]: Start difference. First operand 83 states and 108 transitions. Second operand 23 states. [2019-11-15 23:15:35,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 23:15:35,269 INFO L93 Difference]: Finished difference Result 176 states and 247 transitions. [2019-11-15 23:15:35,269 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-11-15 23:15:35,269 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 119 [2019-11-15 23:15:35,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 23:15:35,271 INFO L225 Difference]: With dead ends: 176 [2019-11-15 23:15:35,271 INFO L226 Difference]: Without dead ends: 86 [2019-11-15 23:15:35,273 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 271 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=203, Invalid=1057, Unknown=0, NotChecked=0, Total=1260 [2019-11-15 23:15:35,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2019-11-15 23:15:35,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 83. [2019-11-15 23:15:35,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2019-11-15 23:15:35,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 100 transitions. [2019-11-15 23:15:35,287 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 100 transitions. Word has length 119 [2019-11-15 23:15:35,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 23:15:35,287 INFO L462 AbstractCegarLoop]: Abstraction has 83 states and 100 transitions. [2019-11-15 23:15:35,287 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-11-15 23:15:35,287 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 100 transitions. [2019-11-15 23:15:35,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2019-11-15 23:15:35,290 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 23:15:35,290 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] [2019-11-15 23:15:35,495 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 23:15:35,495 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 23:15:35,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 23:15:35,496 INFO L82 PathProgramCache]: Analyzing trace with hash 1882786525, now seen corresponding path program 4 times [2019-11-15 23:15:35,496 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 23:15:35,496 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213553979] [2019-11-15 23:15:35,497 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:15:35,497 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:15:35,497 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 23:15:35,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:15:35,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:15:35,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:15:35,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:15:35,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:15:35,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:15:35,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:15:35,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:15:35,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:15:35,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:15:35,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:15:35,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:15:35,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:15:35,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:15:35,799 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 60 proven. 49 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2019-11-15 23:15:35,800 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213553979] [2019-11-15 23:15:35,800 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [508075425] [2019-11-15 23:15:35,800 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8d53e24a-1332-4199-a38a-d4b631565f2b/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 [2019-11-15 23:15:35,852 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-15 23:15:35,852 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-15 23:15:35,853 INFO L256 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-15 23:15:35,854 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 23:15:35,910 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 58 proven. 15 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2019-11-15 23:15:35,910 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 23:15:35,910 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 8] total 19 [2019-11-15 23:15:35,910 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794533200] [2019-11-15 23:15:35,911 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-11-15 23:15:35,911 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 23:15:35,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-11-15 23:15:35,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2019-11-15 23:15:35,912 INFO L87 Difference]: Start difference. First operand 83 states and 100 transitions. Second operand 19 states. [2019-11-15 23:15:36,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 23:15:36,250 INFO L93 Difference]: Finished difference Result 103 states and 122 transitions. [2019-11-15 23:15:36,250 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-11-15 23:15:36,250 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 91 [2019-11-15 23:15:36,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 23:15:36,251 INFO L225 Difference]: With dead ends: 103 [2019-11-15 23:15:36,252 INFO L226 Difference]: Without dead ends: 92 [2019-11-15 23:15:36,252 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=101, Invalid=499, Unknown=0, NotChecked=0, Total=600 [2019-11-15 23:15:36,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2019-11-15 23:15:36,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 87. [2019-11-15 23:15:36,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2019-11-15 23:15:36,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 102 transitions. [2019-11-15 23:15:36,259 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 102 transitions. Word has length 91 [2019-11-15 23:15:36,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 23:15:36,260 INFO L462 AbstractCegarLoop]: Abstraction has 87 states and 102 transitions. [2019-11-15 23:15:36,260 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-11-15 23:15:36,260 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 102 transitions. [2019-11-15 23:15:36,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2019-11-15 23:15:36,261 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 23:15:36,262 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] [2019-11-15 23:15:36,462 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 23:15:36,462 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 23:15:36,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 23:15:36,463 INFO L82 PathProgramCache]: Analyzing trace with hash -1335172610, now seen corresponding path program 5 times [2019-11-15 23:15:36,463 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 23:15:36,463 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023149744] [2019-11-15 23:15:36,463 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:15:36,463 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:15:36,463 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 23:15:36,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:15:36,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:15:36,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:15:36,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:15:36,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:15:36,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:15:36,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:15:36,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:15:36,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:15:36,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:15:36,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:15:37,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:15:37,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:15:37,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:15:37,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:15:37,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:15:37,143 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2019-11-15 23:15:37,144 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023149744] [2019-11-15 23:15:37,144 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2101733929] [2019-11-15 23:15:37,145 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8d53e24a-1332-4199-a38a-d4b631565f2b/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 [2019-11-15 23:15:37,215 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2019-11-15 23:15:37,215 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-15 23:15:37,217 INFO L256 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 63 conjunts are in the unsatisfiable core [2019-11-15 23:15:37,221 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 23:15:37,749 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2019-11-15 23:15:37,750 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 23:15:37,750 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 28 [2019-11-15 23:15:37,750 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223201582] [2019-11-15 23:15:37,751 INFO L442 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-11-15 23:15:37,751 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 23:15:37,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-11-15 23:15:37,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=691, Unknown=0, NotChecked=0, Total=756 [2019-11-15 23:15:37,752 INFO L87 Difference]: Start difference. First operand 87 states and 102 transitions. Second operand 28 states. [2019-11-15 23:15:38,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 23:15:38,001 INFO L93 Difference]: Finished difference Result 100 states and 116 transitions. [2019-11-15 23:15:38,002 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-11-15 23:15:38,002 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 105 [2019-11-15 23:15:38,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 23:15:38,003 INFO L225 Difference]: With dead ends: 100 [2019-11-15 23:15:38,003 INFO L226 Difference]: Without dead ends: 90 [2019-11-15 23:15:38,004 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 133 SyntacticMatches, 8 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=65, Invalid=691, Unknown=0, NotChecked=0, Total=756 [2019-11-15 23:15:38,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2019-11-15 23:15:38,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 89. [2019-11-15 23:15:38,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2019-11-15 23:15:38,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 105 transitions. [2019-11-15 23:15:38,011 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 105 transitions. Word has length 105 [2019-11-15 23:15:38,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 23:15:38,011 INFO L462 AbstractCegarLoop]: Abstraction has 89 states and 105 transitions. [2019-11-15 23:15:38,011 INFO L463 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-11-15 23:15:38,011 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 105 transitions. [2019-11-15 23:15:38,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2019-11-15 23:15:38,012 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 23:15:38,013 INFO L380 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 6, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 23:15:38,221 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 23:15:38,221 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 23:15:38,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 23:15:38,222 INFO L82 PathProgramCache]: Analyzing trace with hash 1449179333, now seen corresponding path program 6 times [2019-11-15 23:15:38,222 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 23:15:38,222 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021991629] [2019-11-15 23:15:38,222 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:15:38,222 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:15:38,222 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 23:15:38,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:15:38,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:15:38,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:15:38,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:15:38,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:15:38,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:15:38,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:15:38,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:15:38,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:15:38,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:15:38,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:15:38,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:15:38,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:15:38,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:15:38,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:15:38,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:15:38,348 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 71 proven. 6 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2019-11-15 23:15:38,348 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021991629] [2019-11-15 23:15:38,348 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [696049218] [2019-11-15 23:15:38,348 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8d53e24a-1332-4199-a38a-d4b631565f2b/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 [2019-11-15 23:15:38,409 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2019-11-15 23:15:38,409 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-15 23:15:38,410 INFO L256 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-15 23:15:38,412 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 23:15:38,437 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 118 proven. 0 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2019-11-15 23:15:38,437 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-15 23:15:38,437 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 7 [2019-11-15 23:15:38,438 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996284680] [2019-11-15 23:15:38,438 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-15 23:15:38,438 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 23:15:38,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-15 23:15:38,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-11-15 23:15:38,439 INFO L87 Difference]: Start difference. First operand 89 states and 105 transitions. Second operand 6 states. [2019-11-15 23:15:38,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 23:15:38,504 INFO L93 Difference]: Finished difference Result 101 states and 117 transitions. [2019-11-15 23:15:38,505 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-15 23:15:38,505 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 104 [2019-11-15 23:15:38,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 23:15:38,505 INFO L225 Difference]: With dead ends: 101 [2019-11-15 23:15:38,506 INFO L226 Difference]: Without dead ends: 0 [2019-11-15 23:15:38,506 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 135 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-11-15 23:15:38,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-11-15 23:15:38,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-11-15 23:15:38,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-11-15 23:15:38,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-11-15 23:15:38,507 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 104 [2019-11-15 23:15:38,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 23:15:38,507 INFO L462 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-11-15 23:15:38,507 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-15 23:15:38,507 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-11-15 23:15:38,508 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-11-15 23:15:38,714 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 23:15:38,719 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2019-11-15 23:15:39,317 WARN L191 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 25 [2019-11-15 23:15:39,598 WARN L191 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 22 [2019-11-15 23:15:39,600 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 39) no Hoare annotation was computed. [2019-11-15 23:15:39,600 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2019-11-15 23:15:39,600 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2019-11-15 23:15:39,600 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2019-11-15 23:15:39,600 INFO L439 ceAbstractionStarter]: At program point L41(lines 35 42) the Hoare annotation is: (<= 5 ULTIMATE.start_main_~x~0) [2019-11-15 23:15:39,600 INFO L443 ceAbstractionStarter]: For program point L39(line 39) no Hoare annotation was computed. [2019-11-15 23:15:39,600 INFO L443 ceAbstractionStarter]: For program point L38(lines 38 40) no Hoare annotation was computed. [2019-11-15 23:15:39,601 INFO L439 ceAbstractionStarter]: At program point L37(line 37) the Hoare annotation is: (and (<= 5 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~x~0 5)) [2019-11-15 23:15:39,601 INFO L443 ceAbstractionStarter]: For program point L37-1(line 37) no Hoare annotation was computed. [2019-11-15 23:15:39,601 INFO L443 ceAbstractionStarter]: For program point L38-2(lines 38 40) no Hoare annotation was computed. [2019-11-15 23:15:39,601 INFO L446 ceAbstractionStarter]: At program point fibo2ENTRY(lines 17 25) the Hoare annotation is: true [2019-11-15 23:15:39,601 INFO L439 ceAbstractionStarter]: At program point L23(line 23) the Hoare annotation is: (and (= fibo2_~n |fibo2_#in~n|) (not (<= |fibo2_#in~n| 2))) [2019-11-15 23:15:39,601 INFO L443 ceAbstractionStarter]: For program point L23-1(line 23) no Hoare annotation was computed. [2019-11-15 23:15:39,601 INFO L439 ceAbstractionStarter]: At program point L23-2(line 23) the Hoare annotation is: (and (let ((.cse0 (= fibo2_~n |fibo2_#in~n|))) (or (and (<= |fibo2_#in~n| 3) .cse0) (and (<= 5 |fibo2_#in~n|) .cse0) (and (<= |fibo2_#t~ret2| 2) .cse0 (<= 2 |fibo2_#t~ret2|)))) (or (<= 4 fibo2_~n) (and (<= 1 |fibo2_#t~ret2|) (<= |fibo2_#t~ret2| 1))) (not (<= |fibo2_#in~n| 2))) [2019-11-15 23:15:39,601 INFO L443 ceAbstractionStarter]: For program point L20(lines 20 24) no Hoare annotation was computed. [2019-11-15 23:15:39,601 INFO L443 ceAbstractionStarter]: For program point L23-3(line 23) no Hoare annotation was computed. [2019-11-15 23:15:39,601 INFO L443 ceAbstractionStarter]: For program point L18(lines 18 24) no Hoare annotation was computed. [2019-11-15 23:15:39,601 INFO L443 ceAbstractionStarter]: For program point fibo2FINAL(lines 17 25) no Hoare annotation was computed. [2019-11-15 23:15:39,601 INFO L443 ceAbstractionStarter]: For program point fibo2EXIT(lines 17 25) no Hoare annotation was computed. [2019-11-15 23:15:39,602 INFO L446 ceAbstractionStarter]: At program point fibo1ENTRY(lines 7 15) the Hoare annotation is: true [2019-11-15 23:15:39,602 INFO L439 ceAbstractionStarter]: At program point L13(line 13) the Hoare annotation is: (and (not (<= |fibo1_#in~n| 1)) (= fibo1_~n |fibo1_#in~n|)) [2019-11-15 23:15:39,602 INFO L443 ceAbstractionStarter]: For program point L13-1(line 13) no Hoare annotation was computed. [2019-11-15 23:15:39,602 INFO L439 ceAbstractionStarter]: At program point L13-2(line 13) the Hoare annotation is: (and (let ((.cse0 (= fibo1_~n |fibo1_#in~n|))) (or (and (<= 4 fibo1_~n) .cse0) (and (<= 1 |fibo1_#t~ret0|) (<= |fibo1_#t~ret0| 1) .cse0))) (< 1 fibo1_~n) (or (<= |fibo1_#in~n| 4) (and (<= 3 |fibo1_#t~ret0|) (<= |fibo1_#t~ret0| 3)) (<= 6 |fibo1_#in~n|))) [2019-11-15 23:15:39,602 INFO L443 ceAbstractionStarter]: For program point fibo1FINAL(lines 7 15) no Hoare annotation was computed. [2019-11-15 23:15:39,602 INFO L443 ceAbstractionStarter]: For program point L10(lines 10 14) no Hoare annotation was computed. [2019-11-15 23:15:39,602 INFO L443 ceAbstractionStarter]: For program point L13-3(line 13) no Hoare annotation was computed. [2019-11-15 23:15:39,602 INFO L443 ceAbstractionStarter]: For program point L8(lines 8 14) no Hoare annotation was computed. [2019-11-15 23:15:39,602 INFO L443 ceAbstractionStarter]: For program point fibo1EXIT(lines 7 15) no Hoare annotation was computed. [2019-11-15 23:15:39,612 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.11 11:15:39 BoogieIcfgContainer [2019-11-15 23:15:39,612 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-15 23:15:39,612 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-15 23:15:39,612 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-15 23:15:39,613 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-15 23:15:39,613 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.11 11:15:25" (3/4) ... [2019-11-15 23:15:39,615 INFO L137 WitnessPrinter]: Generating witness for correct program [2019-11-15 23:15:39,621 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure fibo2 [2019-11-15 23:15:39,621 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure fibo1 [2019-11-15 23:15:39,626 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2019-11-15 23:15:39,626 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2019-11-15 23:15:39,681 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_8d53e24a-1332-4199-a38a-d4b631565f2b/bin/uautomizer/witness.graphml [2019-11-15 23:15:39,682 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-15 23:15:39,683 INFO L168 Benchmark]: Toolchain (without parser) took 14630.64 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 203.9 MB). Free memory was 951.5 MB in the beginning and 853.9 MB in the end (delta: 97.5 MB). Peak memory consumption was 301.5 MB. Max. memory is 11.5 GB. [2019-11-15 23:15:39,684 INFO L168 Benchmark]: CDTParser took 0.64 ms. Allocated memory is still 1.0 GB. Free memory is still 967.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-15 23:15:39,684 INFO L168 Benchmark]: CACSL2BoogieTranslator took 336.65 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 131.1 MB). Free memory was 951.5 MB in the beginning and 1.1 GB in the end (delta: -174.5 MB). Peak memory consumption was 23.0 MB. Max. memory is 11.5 GB. [2019-11-15 23:15:39,685 INFO L168 Benchmark]: Boogie Procedure Inliner took 36.19 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-15 23:15:39,685 INFO L168 Benchmark]: Boogie Preprocessor took 27.52 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-15 23:15:39,686 INFO L168 Benchmark]: RCFGBuilder took 281.39 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 18.3 MB). Peak memory consumption was 18.3 MB. Max. memory is 11.5 GB. [2019-11-15 23:15:39,686 INFO L168 Benchmark]: TraceAbstraction took 13875.02 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 72.9 MB). Free memory was 1.1 GB in the beginning and 856.3 MB in the end (delta: 251.3 MB). Peak memory consumption was 324.2 MB. Max. memory is 11.5 GB. [2019-11-15 23:15:39,687 INFO L168 Benchmark]: Witness Printer took 69.36 ms. Allocated memory is still 1.2 GB. Free memory was 856.3 MB in the beginning and 853.9 MB in the end (delta: 2.4 MB). Peak memory consumption was 2.4 MB. Max. memory is 11.5 GB. [2019-11-15 23:15:39,690 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.64 ms. Allocated memory is still 1.0 GB. Free memory is still 967.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 336.65 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 131.1 MB). Free memory was 951.5 MB in the beginning and 1.1 GB in the end (delta: -174.5 MB). Peak memory consumption was 23.0 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 36.19 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 27.52 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 281.39 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 18.3 MB). Peak memory consumption was 18.3 MB. Max. memory is 11.5 GB. * TraceAbstraction took 13875.02 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 72.9 MB). Free memory was 1.1 GB in the beginning and 856.3 MB in the end (delta: 251.3 MB). Peak memory consumption was 324.2 MB. Max. memory is 11.5 GB. * Witness Printer took 69.36 ms. Allocated memory is still 1.2 GB. Free memory was 856.3 MB in the beginning and 853.9 MB in the end (delta: 2.4 MB). Peak memory consumption was 2.4 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 39]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 35]: Loop Invariant Derived loop invariant: 5 <= x - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 28 locations, 1 error locations. Result: SAFE, OverallTime: 13.7s, OverallIterations: 13, TraceHistogramMax: 10, AutomataDifference: 4.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.8s, HoareTripleCheckerStatistics: 350 SDtfs, 544 SDslu, 2847 SDs, 0 SdLazy, 3657 SolverSat, 544 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1266 GetRequests, 1021 SyntacticMatches, 10 SemanticMatches, 235 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1129 ImplicationChecksByTransitivity, 3.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=112occurred in iteration=8, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 13 MinimizatonAttempts, 94 StatesRemovedByMinimization, 11 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 368 PreInvPairs, 511 NumberOfFragments, 105 HoareAnnotationTreeSize, 368 FomulaSimplifications, 1913 FormulaSimplificationTreeSizeReduction, 0.2s HoareSimplificationTime, 8 FomulaSimplificationsInter, 3623 FormulaSimplificationTreeSizeReductionInter, 0.6s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 4.3s InterpolantComputationTime, 1635 NumberOfCodeBlocks, 1541 NumberOfCodeBlocksAsserted, 38 NumberOfCheckSat, 1611 ConstructedInterpolants, 0 QuantifiedInterpolants, 319341 SizeOfPredicates, 41 NumberOfNonLiveVariables, 1595 ConjunctsInSsa, 145 ConjunctsInUnsatCore, 24 InterpolantComputations, 3 PerfectInterpolantSequences, 2724/3528 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...