./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive-simple/fibo_2calls_5-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f470102c Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_2c263a68-3dfe-4de2-a841-0489c42ea8f8/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_2c263a68-3dfe-4de2-a841-0489c42ea8f8/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_2c263a68-3dfe-4de2-a841-0489c42ea8f8/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_2c263a68-3dfe-4de2-a841-0489c42ea8f8/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive-simple/fibo_2calls_5-2.c -s /tmp/vcloud-vcloud-master/worker/run_dir_2c263a68-3dfe-4de2-a841-0489c42ea8f8/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_2c263a68-3dfe-4de2-a841-0489c42ea8f8/bin/uautomizer --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash fe571d33601eb001defa960d70b02ea99b59263c .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.1.25-f470102 [2019-12-07 16:58:41,994 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-12-07 16:58:41,995 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-12-07 16:58:42,005 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-12-07 16:58:42,006 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-12-07 16:58:42,007 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-12-07 16:58:42,008 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-12-07 16:58:42,010 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-12-07 16:58:42,011 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-12-07 16:58:42,012 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-12-07 16:58:42,013 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-12-07 16:58:42,014 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-12-07 16:58:42,014 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-12-07 16:58:42,015 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-12-07 16:58:42,016 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-12-07 16:58:42,017 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-12-07 16:58:42,018 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-12-07 16:58:42,019 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-12-07 16:58:42,020 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-12-07 16:58:42,022 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-12-07 16:58:42,024 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-12-07 16:58:42,024 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-12-07 16:58:42,025 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-12-07 16:58:42,026 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-12-07 16:58:42,028 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-12-07 16:58:42,028 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-12-07 16:58:42,028 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-12-07 16:58:42,029 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-12-07 16:58:42,029 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-12-07 16:58:42,030 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-12-07 16:58:42,030 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-12-07 16:58:42,031 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-12-07 16:58:42,031 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-12-07 16:58:42,032 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-12-07 16:58:42,033 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-12-07 16:58:42,033 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-12-07 16:58:42,033 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-12-07 16:58:42,033 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-12-07 16:58:42,034 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-12-07 16:58:42,034 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-12-07 16:58:42,035 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-12-07 16:58:42,035 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_2c263a68-3dfe-4de2-a841-0489c42ea8f8/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-12-07 16:58:42,045 INFO L113 SettingsManager]: Loading preferences was successful [2019-12-07 16:58:42,045 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-12-07 16:58:42,046 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-12-07 16:58:42,046 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-12-07 16:58:42,046 INFO L138 SettingsManager]: * Use SBE=true [2019-12-07 16:58:42,046 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-12-07 16:58:42,046 INFO L138 SettingsManager]: * sizeof long=4 [2019-12-07 16:58:42,047 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-12-07 16:58:42,047 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-12-07 16:58:42,047 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-12-07 16:58:42,047 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-12-07 16:58:42,047 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-12-07 16:58:42,047 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-12-07 16:58:42,047 INFO L138 SettingsManager]: * sizeof long double=12 [2019-12-07 16:58:42,047 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-12-07 16:58:42,047 INFO L138 SettingsManager]: * Use constant arrays=true [2019-12-07 16:58:42,048 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-12-07 16:58:42,048 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-12-07 16:58:42,048 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-12-07 16:58:42,048 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-12-07 16:58:42,048 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-12-07 16:58:42,048 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-12-07 16:58:42,048 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-12-07 16:58:42,049 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-12-07 16:58:42,049 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-12-07 16:58:42,049 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-12-07 16:58:42,049 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-12-07 16:58:42,049 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-12-07 16:58:42,049 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2019-12-07 16:58:42,049 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_2c263a68-3dfe-4de2-a841-0489c42ea8f8/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fe571d33601eb001defa960d70b02ea99b59263c [2019-12-07 16:58:42,148 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-12-07 16:58:42,156 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-12-07 16:58:42,159 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-12-07 16:58:42,160 INFO L271 PluginConnector]: Initializing CDTParser... [2019-12-07 16:58:42,161 INFO L275 PluginConnector]: CDTParser initialized [2019-12-07 16:58:42,161 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_2c263a68-3dfe-4de2-a841-0489c42ea8f8/bin/uautomizer/../../sv-benchmarks/c/recursive-simple/fibo_2calls_5-2.c [2019-12-07 16:58:42,200 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_2c263a68-3dfe-4de2-a841-0489c42ea8f8/bin/uautomizer/data/8cf15f6ba/765198d758634a53b1876161401e6e5d/FLAG9e6f285c9 [2019-12-07 16:58:42,605 INFO L306 CDTParser]: Found 1 translation units. [2019-12-07 16:58:42,605 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_2c263a68-3dfe-4de2-a841-0489c42ea8f8/sv-benchmarks/c/recursive-simple/fibo_2calls_5-2.c [2019-12-07 16:58:42,610 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_2c263a68-3dfe-4de2-a841-0489c42ea8f8/bin/uautomizer/data/8cf15f6ba/765198d758634a53b1876161401e6e5d/FLAG9e6f285c9 [2019-12-07 16:58:42,619 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_2c263a68-3dfe-4de2-a841-0489c42ea8f8/bin/uautomizer/data/8cf15f6ba/765198d758634a53b1876161401e6e5d [2019-12-07 16:58:42,621 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-12-07 16:58:42,622 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-12-07 16:58:42,623 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-12-07 16:58:42,623 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-12-07 16:58:42,625 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-12-07 16:58:42,626 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 04:58:42" (1/1) ... [2019-12-07 16:58:42,628 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@34c8857b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 04:58:42, skipping insertion in model container [2019-12-07 16:58:42,628 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 04:58:42" (1/1) ... [2019-12-07 16:58:42,634 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-12-07 16:58:42,645 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-12-07 16:58:42,743 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 16:58:42,745 INFO L203 MainTranslator]: Completed pre-run [2019-12-07 16:58:42,789 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 16:58:42,798 INFO L208 MainTranslator]: Completed translation [2019-12-07 16:58:42,799 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 04:58:42 WrapperNode [2019-12-07 16:58:42,799 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-12-07 16:58:42,800 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-12-07 16:58:42,800 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-12-07 16:58:42,800 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-12-07 16:58:42,807 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 04:58:42" (1/1) ... [2019-12-07 16:58:42,812 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 04:58:42" (1/1) ... [2019-12-07 16:58:42,824 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-12-07 16:58:42,824 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-12-07 16:58:42,824 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-12-07 16:58:42,824 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-12-07 16:58:42,830 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 04:58:42" (1/1) ... [2019-12-07 16:58:42,830 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 04:58:42" (1/1) ... [2019-12-07 16:58:42,830 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 04:58:42" (1/1) ... [2019-12-07 16:58:42,831 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 04:58:42" (1/1) ... [2019-12-07 16:58:42,832 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 04:58:42" (1/1) ... [2019-12-07 16:58:42,833 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 04:58:42" (1/1) ... [2019-12-07 16:58:42,834 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 04:58:42" (1/1) ... [2019-12-07 16:58:42,835 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-12-07 16:58:42,835 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-12-07 16:58:42,835 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-12-07 16:58:42,835 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-12-07 16:58:42,836 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 04:58:42" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2c263a68-3dfe-4de2-a841-0489c42ea8f8/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 [2019-12-07 16:58:42,874 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-12-07 16:58:42,874 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-12-07 16:58:42,874 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2019-12-07 16:58:42,874 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2019-12-07 16:58:42,874 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2019-12-07 16:58:42,874 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2019-12-07 16:58:42,980 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-12-07 16:58:42,980 INFO L287 CfgBuilder]: Removed 4 assume(true) statements. [2019-12-07 16:58:42,981 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 04:58:42 BoogieIcfgContainer [2019-12-07 16:58:42,981 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-12-07 16:58:42,982 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-12-07 16:58:42,982 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-12-07 16:58:42,984 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-12-07 16:58:42,984 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.12 04:58:42" (1/3) ... [2019-12-07 16:58:42,984 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f213fcf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 04:58:42, skipping insertion in model container [2019-12-07 16:58:42,985 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 04:58:42" (2/3) ... [2019-12-07 16:58:42,985 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f213fcf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 04:58:42, skipping insertion in model container [2019-12-07 16:58:42,985 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 04:58:42" (3/3) ... [2019-12-07 16:58:42,986 INFO L109 eAbstractionObserver]: Analyzing ICFG fibo_2calls_5-2.c [2019-12-07 16:58:42,992 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-12-07 16:58:42,996 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-12-07 16:58:43,004 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-12-07 16:58:43,018 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-12-07 16:58:43,019 INFO L374 AbstractCegarLoop]: Hoare is true [2019-12-07 16:58:43,019 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-12-07 16:58:43,019 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-12-07 16:58:43,019 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-12-07 16:58:43,019 INFO L378 AbstractCegarLoop]: Difference is false [2019-12-07 16:58:43,019 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-12-07 16:58:43,019 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-12-07 16:58:43,030 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states. [2019-12-07 16:58:43,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-12-07 16:58:43,034 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 16:58:43,034 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 16:58:43,034 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 16:58:43,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 16:58:43,038 INFO L82 PathProgramCache]: Analyzing trace with hash 1871295635, now seen corresponding path program 1 times [2019-12-07 16:58:43,044 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 16:58:43,044 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22798415] [2019-12-07 16:58:43,044 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 16:58:43,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:58:43,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:58:43,179 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 16:58:43,179 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22798415] [2019-12-07 16:58:43,180 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 16:58:43,180 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-12-07 16:58:43,181 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846323267] [2019-12-07 16:58:43,184 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-12-07 16:58:43,184 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 16:58:43,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-12-07 16:58:43,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-12-07 16:58:43,194 INFO L87 Difference]: Start difference. First operand 28 states. Second operand 7 states. [2019-12-07 16:58:43,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 16:58:43,268 INFO L93 Difference]: Finished difference Result 38 states and 47 transitions. [2019-12-07 16:58:43,268 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-12-07 16:58:43,269 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 9 [2019-12-07 16:58:43,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 16:58:43,278 INFO L225 Difference]: With dead ends: 38 [2019-12-07 16:58:43,278 INFO L226 Difference]: Without dead ends: 26 [2019-12-07 16:58:43,281 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2019-12-07 16:58:43,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-12-07 16:58:43,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2019-12-07 16:58:43,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-12-07 16:58:43,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 33 transitions. [2019-12-07 16:58:43,311 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 33 transitions. Word has length 9 [2019-12-07 16:58:43,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 16:58:43,312 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 33 transitions. [2019-12-07 16:58:43,312 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-12-07 16:58:43,312 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 33 transitions. [2019-12-07 16:58:43,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-12-07 16:58:43,313 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 16:58:43,313 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 16:58:43,313 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 16:58:43,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 16:58:43,314 INFO L82 PathProgramCache]: Analyzing trace with hash -1404217650, now seen corresponding path program 1 times [2019-12-07 16:58:43,314 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 16:58:43,314 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266535580] [2019-12-07 16:58:43,314 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 16:58:43,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:58:43,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:58:43,360 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 16:58:43,361 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266535580] [2019-12-07 16:58:43,361 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 16:58:43,361 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-12-07 16:58:43,361 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941051979] [2019-12-07 16:58:43,362 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-12-07 16:58:43,362 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 16:58:43,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-12-07 16:58:43,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-12-07 16:58:43,363 INFO L87 Difference]: Start difference. First operand 26 states and 33 transitions. Second operand 7 states. [2019-12-07 16:58:43,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 16:58:43,416 INFO L93 Difference]: Finished difference Result 32 states and 40 transitions. [2019-12-07 16:58:43,417 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-12-07 16:58:43,417 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 10 [2019-12-07 16:58:43,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 16:58:43,418 INFO L225 Difference]: With dead ends: 32 [2019-12-07 16:58:43,418 INFO L226 Difference]: Without dead ends: 28 [2019-12-07 16:58:43,418 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2019-12-07 16:58:43,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-12-07 16:58:43,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 26. [2019-12-07 16:58:43,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-12-07 16:58:43,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 33 transitions. [2019-12-07 16:58:43,424 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 33 transitions. Word has length 10 [2019-12-07 16:58:43,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 16:58:43,424 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 33 transitions. [2019-12-07 16:58:43,424 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-12-07 16:58:43,424 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 33 transitions. [2019-12-07 16:58:43,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-12-07 16:58:43,425 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 16:58:43,426 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 16:58:43,426 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 16:58:43,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 16:58:43,426 INFO L82 PathProgramCache]: Analyzing trace with hash -1629927371, now seen corresponding path program 1 times [2019-12-07 16:58:43,426 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 16:58:43,427 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979458761] [2019-12-07 16:58:43,427 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 16:58:43,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:58:43,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:58:43,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:58:43,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:58:43,529 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-07 16:58:43,529 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979458761] [2019-12-07 16:58:43,529 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1333053066] [2019-12-07 16:58:43,529 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2c263a68-3dfe-4de2-a841-0489c42ea8f8/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 [2019-12-07 16:58:43,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:58:43,556 INFO L264 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 6 conjunts are in the unsatisfiable core [2019-12-07 16:58:43,561 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 16:58:43,605 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-07 16:58:43,605 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 16:58:43,605 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7] total 12 [2019-12-07 16:58:43,605 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121510756] [2019-12-07 16:58:43,606 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-07 16:58:43,606 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 16:58:43,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-07 16:58:43,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2019-12-07 16:58:43,606 INFO L87 Difference]: Start difference. First operand 26 states and 33 transitions. Second operand 12 states. [2019-12-07 16:58:43,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 16:58:43,713 INFO L93 Difference]: Finished difference Result 59 states and 83 transitions. [2019-12-07 16:58:43,714 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-07 16:58:43,714 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 22 [2019-12-07 16:58:43,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 16:58:43,715 INFO L225 Difference]: With dead ends: 59 [2019-12-07 16:58:43,715 INFO L226 Difference]: Without dead ends: 35 [2019-12-07 16:58:43,716 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2019-12-07 16:58:43,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-12-07 16:58:43,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 33. [2019-12-07 16:58:43,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-12-07 16:58:43,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 42 transitions. [2019-12-07 16:58:43,724 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 42 transitions. Word has length 22 [2019-12-07 16:58:43,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 16:58:43,725 INFO L462 AbstractCegarLoop]: Abstraction has 33 states and 42 transitions. [2019-12-07 16:58:43,725 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-07 16:58:43,725 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 42 transitions. [2019-12-07 16:58:43,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-12-07 16:58:43,726 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 16:58:43,726 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 16:58:43,927 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 16:58:43,927 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 16:58:43,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 16:58:43,928 INFO L82 PathProgramCache]: Analyzing trace with hash 1285987244, now seen corresponding path program 1 times [2019-12-07 16:58:43,928 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 16:58:43,929 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515648428] [2019-12-07 16:58:43,929 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 16:58:43,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:58:43,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:58:44,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:58:44,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:58:44,032 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-07 16:58:44,032 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515648428] [2019-12-07 16:58:44,033 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [174015254] [2019-12-07 16:58:44,033 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2c263a68-3dfe-4de2-a841-0489c42ea8f8/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 [2019-12-07 16:58:44,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:58:44,054 INFO L264 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 6 conjunts are in the unsatisfiable core [2019-12-07 16:58:44,056 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 16:58:44,078 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-07 16:58:44,078 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 16:58:44,078 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7] total 12 [2019-12-07 16:58:44,078 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962518159] [2019-12-07 16:58:44,079 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-07 16:58:44,079 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 16:58:44,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-07 16:58:44,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2019-12-07 16:58:44,079 INFO L87 Difference]: Start difference. First operand 33 states and 42 transitions. Second operand 12 states. [2019-12-07 16:58:44,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 16:58:44,202 INFO L93 Difference]: Finished difference Result 55 states and 78 transitions. [2019-12-07 16:58:44,202 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-07 16:58:44,202 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 23 [2019-12-07 16:58:44,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 16:58:44,204 INFO L225 Difference]: With dead ends: 55 [2019-12-07 16:58:44,204 INFO L226 Difference]: Without dead ends: 51 [2019-12-07 16:58:44,205 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2019-12-07 16:58:44,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2019-12-07 16:58:44,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 48. [2019-12-07 16:58:44,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2019-12-07 16:58:44,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 68 transitions. [2019-12-07 16:58:44,213 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 68 transitions. Word has length 23 [2019-12-07 16:58:44,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 16:58:44,214 INFO L462 AbstractCegarLoop]: Abstraction has 48 states and 68 transitions. [2019-12-07 16:58:44,214 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-07 16:58:44,214 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 68 transitions. [2019-12-07 16:58:44,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2019-12-07 16:58:44,215 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 16:58:44,215 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 16:58:44,416 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 16:58:44,416 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 16:58:44,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 16:58:44,417 INFO L82 PathProgramCache]: Analyzing trace with hash -649262923, now seen corresponding path program 1 times [2019-12-07 16:58:44,417 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 16:58:44,417 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573705341] [2019-12-07 16:58:44,418 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 16:58:44,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:58:44,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:58:44,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:58:44,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:58:44,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:58:44,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:58:44,537 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-12-07 16:58:44,537 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573705341] [2019-12-07 16:58:44,537 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1406880929] [2019-12-07 16:58:44,537 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2c263a68-3dfe-4de2-a841-0489c42ea8f8/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 [2019-12-07 16:58:44,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:58:44,559 INFO L264 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-07 16:58:44,561 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 16:58:44,601 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-12-07 16:58:44,601 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 16:58:44,602 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2019-12-07 16:58:44,602 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853800095] [2019-12-07 16:58:44,602 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-07 16:58:44,602 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 16:58:44,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-07 16:58:44,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2019-12-07 16:58:44,603 INFO L87 Difference]: Start difference. First operand 48 states and 68 transitions. Second operand 14 states. [2019-12-07 16:58:44,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 16:58:44,834 INFO L93 Difference]: Finished difference Result 114 states and 187 transitions. [2019-12-07 16:58:44,835 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-12-07 16:58:44,835 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 35 [2019-12-07 16:58:44,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 16:58:44,837 INFO L225 Difference]: With dead ends: 114 [2019-12-07 16:58:44,837 INFO L226 Difference]: Without dead ends: 68 [2019-12-07 16:58:44,838 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2019-12-07 16:58:44,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2019-12-07 16:58:44,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 66. [2019-12-07 16:58:44,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2019-12-07 16:58:44,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 98 transitions. [2019-12-07 16:58:44,848 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 98 transitions. Word has length 35 [2019-12-07 16:58:44,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 16:58:44,849 INFO L462 AbstractCegarLoop]: Abstraction has 66 states and 98 transitions. [2019-12-07 16:58:44,849 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-07 16:58:44,849 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 98 transitions. [2019-12-07 16:58:44,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2019-12-07 16:58:44,850 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 16:58:44,851 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 16:58:45,051 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 16:58:45,052 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 16:58:45,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 16:58:45,052 INFO L82 PathProgramCache]: Analyzing trace with hash 2000747716, now seen corresponding path program 1 times [2019-12-07 16:58:45,053 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 16:58:45,053 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438270601] [2019-12-07 16:58:45,053 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 16:58:45,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:58:45,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:58:45,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:58:45,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:58:45,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:58:45,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:58:45,190 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-12-07 16:58:45,190 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438270601] [2019-12-07 16:58:45,191 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1327113789] [2019-12-07 16:58:45,191 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2c263a68-3dfe-4de2-a841-0489c42ea8f8/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 [2019-12-07 16:58:45,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:58:45,214 INFO L264 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-07 16:58:45,215 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 16:58:45,257 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-12-07 16:58:45,257 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 16:58:45,257 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 14 [2019-12-07 16:58:45,257 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598742897] [2019-12-07 16:58:45,258 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-07 16:58:45,258 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 16:58:45,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-07 16:58:45,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2019-12-07 16:58:45,258 INFO L87 Difference]: Start difference. First operand 66 states and 98 transitions. Second operand 14 states. [2019-12-07 16:58:45,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 16:58:45,404 INFO L93 Difference]: Finished difference Result 147 states and 239 transitions. [2019-12-07 16:58:45,405 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-12-07 16:58:45,405 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 36 [2019-12-07 16:58:45,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 16:58:45,406 INFO L225 Difference]: With dead ends: 147 [2019-12-07 16:58:45,406 INFO L226 Difference]: Without dead ends: 83 [2019-12-07 16:58:45,408 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2019-12-07 16:58:45,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2019-12-07 16:58:45,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 66. [2019-12-07 16:58:45,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2019-12-07 16:58:45,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 96 transitions. [2019-12-07 16:58:45,416 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 96 transitions. Word has length 36 [2019-12-07 16:58:45,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 16:58:45,417 INFO L462 AbstractCegarLoop]: Abstraction has 66 states and 96 transitions. [2019-12-07 16:58:45,417 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-07 16:58:45,417 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 96 transitions. [2019-12-07 16:58:45,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2019-12-07 16:58:45,419 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 16:58:45,419 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 16:58:45,619 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 16:58:45,620 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 16:58:45,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 16:58:45,620 INFO L82 PathProgramCache]: Analyzing trace with hash -434541687, now seen corresponding path program 1 times [2019-12-07 16:58:45,620 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 16:58:45,621 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327368635] [2019-12-07 16:58:45,621 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 16:58:45,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:58:45,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:58:45,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:58:45,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:58:45,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:58:45,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:58:45,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:58:45,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:58:45,760 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2019-12-07 16:58:45,760 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327368635] [2019-12-07 16:58:45,761 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [789345965] [2019-12-07 16:58:45,761 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2c263a68-3dfe-4de2-a841-0489c42ea8f8/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 [2019-12-07 16:58:45,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:58:45,783 INFO L264 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-07 16:58:45,785 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 16:58:45,841 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-12-07 16:58:45,842 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 16:58:45,842 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9] total 18 [2019-12-07 16:58:45,842 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182753332] [2019-12-07 16:58:45,842 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-07 16:58:45,842 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 16:58:45,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-07 16:58:45,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2019-12-07 16:58:45,843 INFO L87 Difference]: Start difference. First operand 66 states and 96 transitions. Second operand 18 states. [2019-12-07 16:58:46,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 16:58:46,128 INFO L93 Difference]: Finished difference Result 164 states and 279 transitions. [2019-12-07 16:58:46,128 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-12-07 16:58:46,128 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 50 [2019-12-07 16:58:46,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 16:58:46,130 INFO L225 Difference]: With dead ends: 164 [2019-12-07 16:58:46,130 INFO L226 Difference]: Without dead ends: 100 [2019-12-07 16:58:46,131 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=115, Invalid=587, Unknown=0, NotChecked=0, Total=702 [2019-12-07 16:58:46,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2019-12-07 16:58:46,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 89. [2019-12-07 16:58:46,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2019-12-07 16:58:46,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 145 transitions. [2019-12-07 16:58:46,142 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 145 transitions. Word has length 50 [2019-12-07 16:58:46,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 16:58:46,143 INFO L462 AbstractCegarLoop]: Abstraction has 89 states and 145 transitions. [2019-12-07 16:58:46,143 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-07 16:58:46,143 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 145 transitions. [2019-12-07 16:58:46,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2019-12-07 16:58:46,146 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 16:58:46,146 INFO L410 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 16:58:46,346 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 16:58:46,347 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 16:58:46,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 16:58:46,347 INFO L82 PathProgramCache]: Analyzing trace with hash -1917551255, now seen corresponding path program 1 times [2019-12-07 16:58:46,348 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 16:58:46,348 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517167942] [2019-12-07 16:58:46,348 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 16:58:46,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:58:46,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:58:46,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:58:46,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:58:46,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:58:46,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:58:46,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:58:46,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:58:46,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:58:46,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:58:46,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:58:46,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:58:46,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:58:46,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:58:46,601 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 33 proven. 58 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2019-12-07 16:58:46,601 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517167942] [2019-12-07 16:58:46,601 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [856091348] [2019-12-07 16:58:46,601 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2c263a68-3dfe-4de2-a841-0489c42ea8f8/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 [2019-12-07 16:58:46,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:58:46,628 INFO L264 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-07 16:58:46,631 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 16:58:46,688 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 23 proven. 65 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2019-12-07 16:58:46,688 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 16:58:46,688 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 9] total 19 [2019-12-07 16:58:46,689 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921193354] [2019-12-07 16:58:46,689 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-12-07 16:58:46,689 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 16:58:46,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-12-07 16:58:46,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2019-12-07 16:58:46,690 INFO L87 Difference]: Start difference. First operand 89 states and 145 transitions. Second operand 19 states. [2019-12-07 16:58:47,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 16:58:47,003 INFO L93 Difference]: Finished difference Result 222 states and 415 transitions. [2019-12-07 16:58:47,003 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-12-07 16:58:47,003 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 91 [2019-12-07 16:58:47,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 16:58:47,005 INFO L225 Difference]: With dead ends: 222 [2019-12-07 16:58:47,005 INFO L226 Difference]: Without dead ends: 138 [2019-12-07 16:58:47,006 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=116, Invalid=640, Unknown=0, NotChecked=0, Total=756 [2019-12-07 16:58:47,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2019-12-07 16:58:47,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 112. [2019-12-07 16:58:47,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2019-12-07 16:58:47,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 186 transitions. [2019-12-07 16:58:47,019 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 186 transitions. Word has length 91 [2019-12-07 16:58:47,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 16:58:47,019 INFO L462 AbstractCegarLoop]: Abstraction has 112 states and 186 transitions. [2019-12-07 16:58:47,019 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-12-07 16:58:47,020 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 186 transitions. [2019-12-07 16:58:47,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2019-12-07 16:58:47,021 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 16:58:47,021 INFO L410 BasicCegarLoop]: trace histogram [9, 9, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1] [2019-12-07 16:58:47,222 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 16:58:47,222 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 16:58:47,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 16:58:47,222 INFO L82 PathProgramCache]: Analyzing trace with hash 358391620, now seen corresponding path program 1 times [2019-12-07 16:58:47,223 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 16:58:47,223 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576629660] [2019-12-07 16:58:47,223 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 16:58:47,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:58:47,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:58:47,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:58:47,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:58:47,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:58:47,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:58:47,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:58:47,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:58:47,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:58:47,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:58:47,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:58:47,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:58:47,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:58:47,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:58:47,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:58:47,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:58:47,502 INFO L134 CoverageAnalysis]: Checked inductivity of 270 backedges. 84 proven. 79 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2019-12-07 16:58:47,502 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576629660] [2019-12-07 16:58:47,502 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1714678239] [2019-12-07 16:58:47,502 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2c263a68-3dfe-4de2-a841-0489c42ea8f8/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 [2019-12-07 16:58:47,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:58:47,534 INFO L264 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-07 16:58:47,538 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 16:58:47,613 INFO L134 CoverageAnalysis]: Checked inductivity of 270 backedges. 66 proven. 52 refuted. 0 times theorem prover too weak. 152 trivial. 0 not checked. [2019-12-07 16:58:47,613 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 16:58:47,614 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 10] total 22 [2019-12-07 16:58:47,614 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380235482] [2019-12-07 16:58:47,614 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-12-07 16:58:47,614 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 16:58:47,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-12-07 16:58:47,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=397, Unknown=0, NotChecked=0, Total=462 [2019-12-07 16:58:47,615 INFO L87 Difference]: Start difference. First operand 112 states and 186 transitions. Second operand 22 states. [2019-12-07 16:58:48,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 16:58:48,031 INFO L93 Difference]: Finished difference Result 304 states and 608 transitions. [2019-12-07 16:58:48,031 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-12-07 16:58:48,031 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 105 [2019-12-07 16:58:48,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 16:58:48,033 INFO L225 Difference]: With dead ends: 304 [2019-12-07 16:58:48,033 INFO L226 Difference]: Without dead ends: 153 [2019-12-07 16:58:48,035 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 132 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=136, Invalid=734, Unknown=0, NotChecked=0, Total=870 [2019-12-07 16:58:48,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2019-12-07 16:58:48,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 130. [2019-12-07 16:58:48,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2019-12-07 16:58:48,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 209 transitions. [2019-12-07 16:58:48,046 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 209 transitions. Word has length 105 [2019-12-07 16:58:48,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 16:58:48,047 INFO L462 AbstractCegarLoop]: Abstraction has 130 states and 209 transitions. [2019-12-07 16:58:48,047 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-12-07 16:58:48,047 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 209 transitions. [2019-12-07 16:58:48,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2019-12-07 16:58:48,048 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 16:58:48,048 INFO L410 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 6, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 16:58:48,249 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 16:58:48,249 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 16:58:48,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 16:58:48,250 INFO L82 PathProgramCache]: Analyzing trace with hash 1449179333, now seen corresponding path program 2 times [2019-12-07 16:58:48,250 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 16:58:48,250 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377540342] [2019-12-07 16:58:48,251 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 16:58:48,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:58:48,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:58:48,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:58:48,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:58:48,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:58:48,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:58:48,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:58:48,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:58:48,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:58:48,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:58:48,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:58:48,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:58:48,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:58:48,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:58:48,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:58:48,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:58:48,374 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 71 proven. 6 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2019-12-07 16:58:48,374 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377540342] [2019-12-07 16:58:48,375 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [125807378] [2019-12-07 16:58:48,375 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2c263a68-3dfe-4de2-a841-0489c42ea8f8/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 [2019-12-07 16:58:48,407 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-07 16:58:48,407 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 16:58:48,408 INFO L264 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 5 conjunts are in the unsatisfiable core [2019-12-07 16:58:48,411 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 16:58:48,433 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 118 proven. 0 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2019-12-07 16:58:48,434 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-12-07 16:58:48,434 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 9 [2019-12-07 16:58:48,434 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456355434] [2019-12-07 16:58:48,434 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-12-07 16:58:48,434 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 16:58:48,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-12-07 16:58:48,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2019-12-07 16:58:48,435 INFO L87 Difference]: Start difference. First operand 130 states and 209 transitions. Second operand 6 states. [2019-12-07 16:58:48,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 16:58:48,467 INFO L93 Difference]: Finished difference Result 236 states and 406 transitions. [2019-12-07 16:58:48,467 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-12-07 16:58:48,467 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 104 [2019-12-07 16:58:48,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 16:58:48,468 INFO L225 Difference]: With dead ends: 236 [2019-12-07 16:58:48,469 INFO L226 Difference]: Without dead ends: 109 [2019-12-07 16:58:48,470 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 135 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2019-12-07 16:58:48,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2019-12-07 16:58:48,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 106. [2019-12-07 16:58:48,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2019-12-07 16:58:48,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 156 transitions. [2019-12-07 16:58:48,476 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 156 transitions. Word has length 104 [2019-12-07 16:58:48,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 16:58:48,477 INFO L462 AbstractCegarLoop]: Abstraction has 106 states and 156 transitions. [2019-12-07 16:58:48,477 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-12-07 16:58:48,477 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 156 transitions. [2019-12-07 16:58:48,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2019-12-07 16:58:48,478 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 16:58:48,478 INFO L410 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 8, 7, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2019-12-07 16:58:48,678 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 16:58:48,679 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 16:58:48,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 16:58:48,679 INFO L82 PathProgramCache]: Analyzing trace with hash 311986411, now seen corresponding path program 3 times [2019-12-07 16:58:48,679 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 16:58:48,679 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833766147] [2019-12-07 16:58:48,679 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 16:58:48,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:58:48,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:58:48,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:58:48,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:58:48,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:58:48,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:58:48,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:58:48,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:58:48,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:58:48,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:58:48,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:58:48,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:58:48,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:58:48,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:58:48,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:58:48,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:58:48,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:58:48,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:58:48,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:58:48,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:58:48,950 INFO L134 CoverageAnalysis]: Checked inductivity of 437 backedges. 92 proven. 147 refuted. 0 times theorem prover too weak. 198 trivial. 0 not checked. [2019-12-07 16:58:48,951 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833766147] [2019-12-07 16:58:48,951 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [726646924] [2019-12-07 16:58:48,951 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2c263a68-3dfe-4de2-a841-0489c42ea8f8/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 [2019-12-07 16:58:48,981 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-12-07 16:58:48,981 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 16:58:48,981 INFO L264 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-07 16:58:48,992 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 16:58:49,062 INFO L134 CoverageAnalysis]: Checked inductivity of 437 backedges. 127 proven. 29 refuted. 0 times theorem prover too weak. 281 trivial. 0 not checked. [2019-12-07 16:58:49,062 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 16:58:49,062 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 9] total 27 [2019-12-07 16:58:49,062 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755549462] [2019-12-07 16:58:49,063 INFO L442 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-12-07 16:58:49,063 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 16:58:49,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-12-07 16:58:49,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=610, Unknown=0, NotChecked=0, Total=702 [2019-12-07 16:58:49,063 INFO L87 Difference]: Start difference. First operand 106 states and 156 transitions. Second operand 27 states. [2019-12-07 16:58:49,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 16:58:49,541 INFO L93 Difference]: Finished difference Result 245 states and 416 transitions. [2019-12-07 16:58:49,542 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-12-07 16:58:49,542 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 132 [2019-12-07 16:58:49,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 16:58:49,543 INFO L225 Difference]: With dead ends: 245 [2019-12-07 16:58:49,543 INFO L226 Difference]: Without dead ends: 134 [2019-12-07 16:58:49,544 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 369 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=228, Invalid=1412, Unknown=0, NotChecked=0, Total=1640 [2019-12-07 16:58:49,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2019-12-07 16:58:49,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 115. [2019-12-07 16:58:49,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2019-12-07 16:58:49,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 158 transitions. [2019-12-07 16:58:49,551 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 158 transitions. Word has length 132 [2019-12-07 16:58:49,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 16:58:49,551 INFO L462 AbstractCegarLoop]: Abstraction has 115 states and 158 transitions. [2019-12-07 16:58:49,551 INFO L463 AbstractCegarLoop]: Interpolant automaton has 27 states. [2019-12-07 16:58:49,551 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 158 transitions. [2019-12-07 16:58:49,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2019-12-07 16:58:49,552 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 16:58:49,552 INFO L410 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 16:58:49,753 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 16:58:49,753 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 16:58:49,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 16:58:49,753 INFO L82 PathProgramCache]: Analyzing trace with hash 1882786525, now seen corresponding path program 4 times [2019-12-07 16:58:49,753 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 16:58:49,753 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412406584] [2019-12-07 16:58:49,754 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 16:58:49,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:58:49,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:58:49,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:58:49,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:58:49,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:58:49,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:58:49,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:58:49,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:58:49,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:58:49,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:58:49,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:58:49,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:58:49,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:58:49,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:58:49,941 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 60 proven. 49 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2019-12-07 16:58:49,941 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412406584] [2019-12-07 16:58:49,941 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1128400349] [2019-12-07 16:58:49,942 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2c263a68-3dfe-4de2-a841-0489c42ea8f8/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 [2019-12-07 16:58:49,968 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-07 16:58:49,968 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 16:58:49,969 INFO L264 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-07 16:58:49,971 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 16:58:50,008 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 58 proven. 15 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2019-12-07 16:58:50,009 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 16:58:50,009 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 8] total 21 [2019-12-07 16:58:50,009 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721972884] [2019-12-07 16:58:50,009 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-12-07 16:58:50,009 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 16:58:50,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-12-07 16:58:50,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2019-12-07 16:58:50,010 INFO L87 Difference]: Start difference. First operand 115 states and 158 transitions. Second operand 21 states. [2019-12-07 16:58:50,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 16:58:50,260 INFO L93 Difference]: Finished difference Result 245 states and 346 transitions. [2019-12-07 16:58:50,261 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-12-07 16:58:50,261 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 91 [2019-12-07 16:58:50,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 16:58:50,262 INFO L225 Difference]: With dead ends: 245 [2019-12-07 16:58:50,262 INFO L226 Difference]: Without dead ends: 135 [2019-12-07 16:58:50,263 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=597, Unknown=0, NotChecked=0, Total=702 [2019-12-07 16:58:50,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2019-12-07 16:58:50,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 119. [2019-12-07 16:58:50,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2019-12-07 16:58:50,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 156 transitions. [2019-12-07 16:58:50,270 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 156 transitions. Word has length 91 [2019-12-07 16:58:50,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 16:58:50,270 INFO L462 AbstractCegarLoop]: Abstraction has 119 states and 156 transitions. [2019-12-07 16:58:50,270 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-12-07 16:58:50,270 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 156 transitions. [2019-12-07 16:58:50,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2019-12-07 16:58:50,271 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 16:58:50,272 INFO L410 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 6, 6, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 16:58:50,472 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 16:58:50,472 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 16:58:50,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 16:58:50,473 INFO L82 PathProgramCache]: Analyzing trace with hash -1335172610, now seen corresponding path program 5 times [2019-12-07 16:58:50,473 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 16:58:50,473 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876184730] [2019-12-07 16:58:50,473 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 16:58:50,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 16:58:50,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 16:58:50,500 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-12-07 16:58:50,500 INFO L475 BasicCegarLoop]: Counterexample might be feasible [2019-12-07 16:58:50,528 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.12 04:58:50 BoogieIcfgContainer [2019-12-07 16:58:50,528 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-12-07 16:58:50,528 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-12-07 16:58:50,528 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-12-07 16:58:50,528 INFO L275 PluginConnector]: Witness Printer initialized [2019-12-07 16:58:50,529 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 04:58:42" (3/4) ... [2019-12-07 16:58:50,530 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-12-07 16:58:50,576 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_2c263a68-3dfe-4de2-a841-0489c42ea8f8/bin/uautomizer/witness.graphml [2019-12-07 16:58:50,576 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-12-07 16:58:50,578 INFO L168 Benchmark]: Toolchain (without parser) took 7955.04 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 189.8 MB). Free memory was 939.3 MB in the beginning and 829.6 MB in the end (delta: 109.7 MB). Peak memory consumption was 299.5 MB. Max. memory is 11.5 GB. [2019-12-07 16:58:50,578 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 1.0 GB. Free memory is still 955.4 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 16:58:50,578 INFO L168 Benchmark]: CACSL2BoogieTranslator took 176.61 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 103.3 MB). Free memory was 939.3 MB in the beginning and 1.1 GB in the end (delta: -161.4 MB). Peak memory consumption was 24.6 MB. Max. memory is 11.5 GB. [2019-12-07 16:58:50,578 INFO L168 Benchmark]: Boogie Procedure Inliner took 24.32 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 16:58:50,579 INFO L168 Benchmark]: Boogie Preprocessor took 10.75 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. [2019-12-07 16:58:50,579 INFO L168 Benchmark]: RCFGBuilder took 146.15 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 16.5 MB). Peak memory consumption was 16.5 MB. Max. memory is 11.5 GB. [2019-12-07 16:58:50,579 INFO L168 Benchmark]: TraceAbstraction took 7546.12 ms. Allocated memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: 86.5 MB). Free memory was 1.1 GB in the beginning and 839.2 MB in the end (delta: 242.3 MB). Peak memory consumption was 328.8 MB. Max. memory is 11.5 GB. [2019-12-07 16:58:50,579 INFO L168 Benchmark]: Witness Printer took 47.95 ms. Allocated memory is still 1.2 GB. Free memory was 839.2 MB in the beginning and 829.6 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 11.5 GB. [2019-12-07 16:58:50,581 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 1.0 GB. Free memory is still 955.4 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 176.61 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 103.3 MB). Free memory was 939.3 MB in the beginning and 1.1 GB in the end (delta: -161.4 MB). Peak memory consumption was 24.6 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 24.32 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 10.75 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. * RCFGBuilder took 146.15 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 16.5 MB). Peak memory consumption was 16.5 MB. Max. memory is 11.5 GB. * TraceAbstraction took 7546.12 ms. Allocated memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: 86.5 MB). Free memory was 1.1 GB in the beginning and 839.2 MB in the end (delta: 242.3 MB). Peak memory consumption was 328.8 MB. Max. memory is 11.5 GB. * Witness Printer took 47.95 ms. Allocated memory is still 1.2 GB. Free memory was 839.2 MB in the beginning and 829.6 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 39]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L36] int x = 5; [L37] CALL, EXPR fibo1(x) VAL [\old(n)=5] [L8] COND FALSE !(n < 1) VAL [\old(n)=5, n=5] [L10] COND FALSE !(n == 1) VAL [\old(n)=5, n=5] [L13] CALL, EXPR fibo2(n-1) VAL [\old(n)=4] [L18] COND FALSE !(n < 1) VAL [\old(n)=4, n=4] [L20] COND FALSE !(n == 1) VAL [\old(n)=4, n=4] [L23] CALL, EXPR fibo1(n-1) VAL [\old(n)=3] [L8] COND FALSE !(n < 1) VAL [\old(n)=3, n=3] [L10] COND FALSE !(n == 1) VAL [\old(n)=3, n=3] [L13] CALL, EXPR fibo2(n-1) VAL [\old(n)=2] [L18] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L20] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L23] CALL, EXPR fibo1(n-1) VAL [\old(n)=1] [L8] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L10] COND TRUE n == 1 [L11] return 1; VAL [\old(n)=1, \result=1, n=1] [L23] RET, EXPR fibo1(n-1) VAL [\old(n)=2, fibo1(n-1)=1, n=2] [L23] CALL, EXPR fibo1(n-2) VAL [\old(n)=0] [L8] COND TRUE n < 1 [L9] return 0; VAL [\old(n)=0, \result=0, n=0] [L23] RET, EXPR fibo1(n-2) VAL [\old(n)=2, fibo1(n-1)=1, fibo1(n-2)=0, n=2] [L23] return fibo1(n-1) + fibo1(n-2); [L13] RET, EXPR fibo2(n-1) VAL [\old(n)=3, fibo2(n-1)=1, n=3] [L13] CALL, EXPR fibo2(n-2) VAL [\old(n)=1] [L18] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L20] COND TRUE n == 1 [L21] return 1; VAL [\old(n)=1, \result=1, n=1] [L13] RET, EXPR fibo2(n-2) VAL [\old(n)=3, fibo2(n-1)=1, fibo2(n-2)=1, n=3] [L13] return fibo2(n-1) + fibo2(n-2); [L23] RET, EXPR fibo1(n-1) VAL [\old(n)=4, fibo1(n-1)=2, n=4] [L23] CALL, EXPR fibo1(n-2) VAL [\old(n)=2] [L8] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L10] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L13] CALL, EXPR fibo2(n-1) VAL [\old(n)=1] [L18] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L20] COND TRUE n == 1 [L21] return 1; VAL [\old(n)=1, \result=1, n=1] [L13] RET, EXPR fibo2(n-1) VAL [\old(n)=2, fibo2(n-1)=1, n=2] [L13] CALL, EXPR fibo2(n-2) VAL [\old(n)=0] [L18] COND TRUE n < 1 [L19] return 0; VAL [\old(n)=0, \result=0, n=0] [L13] RET, EXPR fibo2(n-2) VAL [\old(n)=2, fibo2(n-1)=1, fibo2(n-2)=0, n=2] [L13] return fibo2(n-1) + fibo2(n-2); [L23] RET, EXPR fibo1(n-2) VAL [\old(n)=4, fibo1(n-1)=2, fibo1(n-2)=1, n=4] [L23] return fibo1(n-1) + fibo1(n-2); [L13] RET, EXPR fibo2(n-1) VAL [\old(n)=5, fibo2(n-1)=3, n=5] [L13] CALL, EXPR fibo2(n-2) VAL [\old(n)=3] [L18] COND FALSE !(n < 1) VAL [\old(n)=3, n=3] [L20] COND FALSE !(n == 1) VAL [\old(n)=3, n=3] [L23] CALL, EXPR fibo1(n-1) VAL [\old(n)=2] [L8] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L10] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L13] CALL, EXPR fibo2(n-1) VAL [\old(n)=1] [L18] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L20] COND TRUE n == 1 [L21] return 1; VAL [\old(n)=1, \result=1, n=1] [L13] RET, EXPR fibo2(n-1) VAL [\old(n)=2, fibo2(n-1)=1, n=2] [L13] CALL, EXPR fibo2(n-2) VAL [\old(n)=0] [L18] COND TRUE n < 1 [L19] return 0; VAL [\old(n)=0, \result=0, n=0] [L13] RET, EXPR fibo2(n-2) VAL [\old(n)=2, fibo2(n-1)=1, fibo2(n-2)=0, n=2] [L13] return fibo2(n-1) + fibo2(n-2); [L23] RET, EXPR fibo1(n-1) VAL [\old(n)=3, fibo1(n-1)=1, n=3] [L23] CALL, EXPR fibo1(n-2) VAL [\old(n)=1] [L8] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L10] COND TRUE n == 1 [L11] return 1; VAL [\old(n)=1, \result=1, n=1] [L23] RET, EXPR fibo1(n-2) VAL [\old(n)=3, fibo1(n-1)=1, fibo1(n-2)=1, n=3] [L23] return fibo1(n-1) + fibo1(n-2); [L13] RET, EXPR fibo2(n-2) VAL [\old(n)=5, fibo2(n-1)=3, fibo2(n-2)=2, n=5] [L13] return fibo2(n-1) + fibo2(n-2); [L37] RET, EXPR fibo1(x) [L37] int result = fibo1(x); [L38] COND TRUE result == 5 [L39] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 28 locations, 1 error locations. Result: UNSAFE, OverallTime: 7.4s, OverallIterations: 13, TraceHistogramMax: 10, AutomataDifference: 2.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 309 SDtfs, 557 SDslu, 2213 SDs, 0 SdLazy, 3847 SolverSat, 543 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1096 GetRequests, 871 SyntacticMatches, 3 SemanticMatches, 222 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 961 ImplicationChecksByTransitivity, 1.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=130occurred in iteration=9, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 12 MinimizatonAttempts, 124 StatesRemovedByMinimization, 11 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 2.1s InterpolantComputationTime, 1502 NumberOfCodeBlocks, 1434 NumberOfCodeBlocksAsserted, 29 NumberOfCheckSat, 1375 ConstructedInterpolants, 0 QuantifiedInterpolants, 220661 SizeOfPredicates, 40 NumberOfNonLiveVariables, 1398 ConjunctsInSsa, 82 ConjunctsInUnsatCore, 22 InterpolantComputations, 3 PerfectInterpolantSequences, 2277/2852 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...