./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive-simple/fibo_2calls_4-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cad46833 Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_277018a0-c18c-476d-a32f-db5d10f82df4/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_277018a0-c18c-476d-a32f-db5d10f82df4/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_277018a0-c18c-476d-a32f-db5d10f82df4/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_277018a0-c18c-476d-a32f-db5d10f82df4/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive-simple/fibo_2calls_4-2.c -s /tmp/vcloud-vcloud-master/worker/run_dir_277018a0-c18c-476d-a32f-db5d10f82df4/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_277018a0-c18c-476d-a32f-db5d10f82df4/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 7a7b79fb8a331a00295fb9ddfb653e17bda3c30d ......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.1.24-cad4683 [2019-11-16 00:33:11,972 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-16 00:33:11,974 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-16 00:33:11,984 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-16 00:33:11,984 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-16 00:33:11,985 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-16 00:33:11,986 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-16 00:33:11,988 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-16 00:33:11,990 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-16 00:33:11,991 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-16 00:33:11,992 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-16 00:33:11,993 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-16 00:33:11,993 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-16 00:33:11,994 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-16 00:33:11,995 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-16 00:33:11,996 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-16 00:33:11,997 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-16 00:33:11,997 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-16 00:33:11,999 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-16 00:33:12,001 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-16 00:33:12,002 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-16 00:33:12,003 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-16 00:33:12,004 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-16 00:33:12,005 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-16 00:33:12,007 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-16 00:33:12,007 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-16 00:33:12,007 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-16 00:33:12,008 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-16 00:33:12,008 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-16 00:33:12,009 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-16 00:33:12,009 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-16 00:33:12,010 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-16 00:33:12,010 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-16 00:33:12,011 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-16 00:33:12,012 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-16 00:33:12,012 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-16 00:33:12,013 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-16 00:33:12,013 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-16 00:33:12,013 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-16 00:33:12,014 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-16 00:33:12,014 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-16 00:33:12,017 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_277018a0-c18c-476d-a32f-db5d10f82df4/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-16 00:33:12,030 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-16 00:33:12,030 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-16 00:33:12,031 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-16 00:33:12,031 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-16 00:33:12,033 INFO L138 SettingsManager]: * Use SBE=true [2019-11-16 00:33:12,033 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-16 00:33:12,033 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-16 00:33:12,033 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-16 00:33:12,034 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-16 00:33:12,034 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-16 00:33:12,035 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-16 00:33:12,035 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-16 00:33:12,035 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-16 00:33:12,035 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-16 00:33:12,035 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-16 00:33:12,036 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-16 00:33:12,036 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-16 00:33:12,036 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-16 00:33:12,036 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-16 00:33:12,037 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-16 00:33:12,037 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-16 00:33:12,037 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-16 00:33:12,037 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-16 00:33:12,038 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-16 00:33:12,038 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-16 00:33:12,038 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-16 00:33:12,038 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-16 00:33:12,039 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-16 00:33:12,039 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_277018a0-c18c-476d-a32f-db5d10f82df4/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 -> 7a7b79fb8a331a00295fb9ddfb653e17bda3c30d [2019-11-16 00:33:12,098 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-16 00:33:12,107 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-16 00:33:12,110 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-16 00:33:12,111 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-16 00:33:12,111 INFO L275 PluginConnector]: CDTParser initialized [2019-11-16 00:33:12,112 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_277018a0-c18c-476d-a32f-db5d10f82df4/bin/uautomizer/../../sv-benchmarks/c/recursive-simple/fibo_2calls_4-2.c [2019-11-16 00:33:12,175 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_277018a0-c18c-476d-a32f-db5d10f82df4/bin/uautomizer/data/a7479a693/aba6fa43918d454da5548bafdaf1ddc6/FLAGb459914b3 [2019-11-16 00:33:12,543 INFO L306 CDTParser]: Found 1 translation units. [2019-11-16 00:33:12,544 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_277018a0-c18c-476d-a32f-db5d10f82df4/sv-benchmarks/c/recursive-simple/fibo_2calls_4-2.c [2019-11-16 00:33:12,550 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_277018a0-c18c-476d-a32f-db5d10f82df4/bin/uautomizer/data/a7479a693/aba6fa43918d454da5548bafdaf1ddc6/FLAGb459914b3 [2019-11-16 00:33:12,958 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_277018a0-c18c-476d-a32f-db5d10f82df4/bin/uautomizer/data/a7479a693/aba6fa43918d454da5548bafdaf1ddc6 [2019-11-16 00:33:12,961 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-16 00:33:12,962 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-16 00:33:12,963 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-16 00:33:12,963 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-16 00:33:12,966 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-16 00:33:12,967 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 12:33:12" (1/1) ... [2019-11-16 00:33:12,969 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@13a7b909 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:33:12, skipping insertion in model container [2019-11-16 00:33:12,969 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 12:33:12" (1/1) ... [2019-11-16 00:33:12,977 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-16 00:33:12,989 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-16 00:33:13,179 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-16 00:33:13,184 INFO L188 MainTranslator]: Completed pre-run [2019-11-16 00:33:13,198 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-16 00:33:13,210 INFO L192 MainTranslator]: Completed translation [2019-11-16 00:33:13,211 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:33:13 WrapperNode [2019-11-16 00:33:13,211 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-16 00:33:13,212 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-16 00:33:13,212 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-16 00:33:13,212 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-16 00:33:13,220 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:33:13" (1/1) ... [2019-11-16 00:33:13,225 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:33:13" (1/1) ... [2019-11-16 00:33:13,238 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-16 00:33:13,239 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-16 00:33:13,239 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-16 00:33:13,239 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-16 00:33:13,245 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:33:13" (1/1) ... [2019-11-16 00:33:13,245 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:33:13" (1/1) ... [2019-11-16 00:33:13,246 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:33:13" (1/1) ... [2019-11-16 00:33:13,246 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:33:13" (1/1) ... [2019-11-16 00:33:13,248 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:33:13" (1/1) ... [2019-11-16 00:33:13,250 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:33:13" (1/1) ... [2019-11-16 00:33:13,251 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:33:13" (1/1) ... [2019-11-16 00:33:13,252 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-16 00:33:13,252 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-16 00:33:13,253 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-16 00:33:13,253 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-16 00:33:13,254 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:33:13" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_277018a0-c18c-476d-a32f-db5d10f82df4/bin/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-16 00:33:13,320 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-16 00:33:13,320 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-16 00:33:13,320 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2019-11-16 00:33:13,321 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2019-11-16 00:33:13,321 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2019-11-16 00:33:13,321 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2019-11-16 00:33:13,594 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-16 00:33:13,594 INFO L284 CfgBuilder]: Removed 4 assume(true) statements. [2019-11-16 00:33:13,595 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 12:33:13 BoogieIcfgContainer [2019-11-16 00:33:13,595 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-16 00:33:13,596 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-16 00:33:13,596 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-16 00:33:13,600 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-16 00:33:13,600 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 12:33:12" (1/3) ... [2019-11-16 00:33:13,601 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31b94d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 12:33:13, skipping insertion in model container [2019-11-16 00:33:13,601 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:33:13" (2/3) ... [2019-11-16 00:33:13,602 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31b94d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 12:33:13, skipping insertion in model container [2019-11-16 00:33:13,602 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 12:33:13" (3/3) ... [2019-11-16 00:33:13,603 INFO L109 eAbstractionObserver]: Analyzing ICFG fibo_2calls_4-2.c [2019-11-16 00:33:13,614 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-16 00:33:13,624 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-16 00:33:13,636 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-16 00:33:13,669 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-16 00:33:13,670 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-16 00:33:13,670 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-16 00:33:13,671 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-16 00:33:13,671 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-16 00:33:13,671 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-16 00:33:13,671 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-16 00:33:13,672 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-16 00:33:13,691 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states. [2019-11-16 00:33:13,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-11-16 00:33:13,696 INFO L372 BasicCegarLoop]: Found error trace [2019-11-16 00:33:13,696 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-16 00:33:13,698 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-16 00:33:13,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-16 00:33:13,706 INFO L82 PathProgramCache]: Analyzing trace with hash 1871295635, now seen corresponding path program 1 times [2019-11-16 00:33:13,714 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-16 00:33:13,714 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936274557] [2019-11-16 00:33:13,715 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:33:13,715 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:33:13,715 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-16 00:33:13,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:33:13,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:33:13,954 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-16 00:33:13,955 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936274557] [2019-11-16 00:33:13,956 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-16 00:33:13,956 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-11-16 00:33:13,956 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891498882] [2019-11-16 00:33:13,960 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-16 00:33:13,960 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-16 00:33:13,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-16 00:33:13,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-11-16 00:33:13,973 INFO L87 Difference]: Start difference. First operand 28 states. Second operand 7 states. [2019-11-16 00:33:14,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-16 00:33:14,106 INFO L93 Difference]: Finished difference Result 38 states and 47 transitions. [2019-11-16 00:33:14,106 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-16 00:33:14,108 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 9 [2019-11-16 00:33:14,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-16 00:33:14,115 INFO L225 Difference]: With dead ends: 38 [2019-11-16 00:33:14,115 INFO L226 Difference]: Without dead ends: 26 [2019-11-16 00:33:14,117 INFO L600 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 [2019-11-16 00:33:14,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-11-16 00:33:14,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2019-11-16 00:33:14,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-11-16 00:33:14,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 33 transitions. [2019-11-16 00:33:14,150 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 33 transitions. Word has length 9 [2019-11-16 00:33:14,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-16 00:33:14,151 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 33 transitions. [2019-11-16 00:33:14,151 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-16 00:33:14,151 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 33 transitions. [2019-11-16 00:33:14,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-16 00:33:14,152 INFO L372 BasicCegarLoop]: Found error trace [2019-11-16 00:33:14,152 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-16 00:33:14,153 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-16 00:33:14,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-16 00:33:14,153 INFO L82 PathProgramCache]: Analyzing trace with hash -1404217650, now seen corresponding path program 1 times [2019-11-16 00:33:14,153 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-16 00:33:14,154 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090930303] [2019-11-16 00:33:14,154 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:33:14,154 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:33:14,154 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-16 00:33:14,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:33:14,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:33:14,267 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-16 00:33:14,267 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090930303] [2019-11-16 00:33:14,267 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-16 00:33:14,267 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-11-16 00:33:14,268 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056088016] [2019-11-16 00:33:14,269 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-16 00:33:14,269 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-16 00:33:14,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-16 00:33:14,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-11-16 00:33:14,270 INFO L87 Difference]: Start difference. First operand 26 states and 33 transitions. Second operand 7 states. [2019-11-16 00:33:14,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-16 00:33:14,334 INFO L93 Difference]: Finished difference Result 32 states and 40 transitions. [2019-11-16 00:33:14,335 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-16 00:33:14,335 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 10 [2019-11-16 00:33:14,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-16 00:33:14,336 INFO L225 Difference]: With dead ends: 32 [2019-11-16 00:33:14,337 INFO L226 Difference]: Without dead ends: 28 [2019-11-16 00:33:14,337 INFO L600 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 [2019-11-16 00:33:14,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-11-16 00:33:14,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 26. [2019-11-16 00:33:14,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-11-16 00:33:14,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 33 transitions. [2019-11-16 00:33:14,345 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 33 transitions. Word has length 10 [2019-11-16 00:33:14,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-16 00:33:14,345 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 33 transitions. [2019-11-16 00:33:14,345 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-16 00:33:14,345 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 33 transitions. [2019-11-16 00:33:14,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-11-16 00:33:14,347 INFO L372 BasicCegarLoop]: Found error trace [2019-11-16 00:33:14,347 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-16 00:33:14,347 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-16 00:33:14,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-16 00:33:14,347 INFO L82 PathProgramCache]: Analyzing trace with hash -1629927371, now seen corresponding path program 1 times [2019-11-16 00:33:14,348 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-16 00:33:14,348 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611327285] [2019-11-16 00:33:14,348 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:33:14,348 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:33:14,348 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-16 00:33:14,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:33:14,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:33:14,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:33:14,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:33:14,505 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-16 00:33:14,509 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611327285] [2019-11-16 00:33:14,509 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1723179218] [2019-11-16 00:33:14,509 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_277018a0-c18c-476d-a32f-db5d10f82df4/bin/uautomizer/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-16 00:33:14,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:33:14,560 INFO L256 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-16 00:33:14,565 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-16 00:33:14,628 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-16 00:33:14,629 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-16 00:33:14,629 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7] total 12 [2019-11-16 00:33:14,629 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175443183] [2019-11-16 00:33:14,630 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-16 00:33:14,630 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-16 00:33:14,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-16 00:33:14,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2019-11-16 00:33:14,631 INFO L87 Difference]: Start difference. First operand 26 states and 33 transitions. Second operand 12 states. [2019-11-16 00:33:14,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-16 00:33:14,812 INFO L93 Difference]: Finished difference Result 59 states and 83 transitions. [2019-11-16 00:33:14,813 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-16 00:33:14,813 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 22 [2019-11-16 00:33:14,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-16 00:33:14,814 INFO L225 Difference]: With dead ends: 59 [2019-11-16 00:33:14,814 INFO L226 Difference]: Without dead ends: 35 [2019-11-16 00:33:14,816 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2019-11-16 00:33:14,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-11-16 00:33:14,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 33. [2019-11-16 00:33:14,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-11-16 00:33:14,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 42 transitions. [2019-11-16 00:33:14,825 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 42 transitions. Word has length 22 [2019-11-16 00:33:14,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-16 00:33:14,825 INFO L462 AbstractCegarLoop]: Abstraction has 33 states and 42 transitions. [2019-11-16 00:33:14,825 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-16 00:33:14,825 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 42 transitions. [2019-11-16 00:33:14,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-11-16 00:33:14,827 INFO L372 BasicCegarLoop]: Found error trace [2019-11-16 00:33:14,827 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-16 00:33:15,036 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-16 00:33:15,040 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-16 00:33:15,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-16 00:33:15,040 INFO L82 PathProgramCache]: Analyzing trace with hash 1285987244, now seen corresponding path program 1 times [2019-11-16 00:33:15,040 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-16 00:33:15,041 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082861191] [2019-11-16 00:33:15,041 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:33:15,041 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:33:15,041 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-16 00:33:15,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:33:15,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:33:15,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:33:15,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:33:15,197 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-16 00:33:15,197 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082861191] [2019-11-16 00:33:15,197 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [87278801] [2019-11-16 00:33:15,197 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_277018a0-c18c-476d-a32f-db5d10f82df4/bin/uautomizer/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-16 00:33:15,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:33:15,236 INFO L256 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-16 00:33:15,239 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-16 00:33:15,283 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-16 00:33:15,283 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-16 00:33:15,283 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7] total 12 [2019-11-16 00:33:15,283 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227802617] [2019-11-16 00:33:15,284 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-16 00:33:15,284 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-16 00:33:15,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-16 00:33:15,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2019-11-16 00:33:15,285 INFO L87 Difference]: Start difference. First operand 33 states and 42 transitions. Second operand 12 states. [2019-11-16 00:33:15,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-16 00:33:15,560 INFO L93 Difference]: Finished difference Result 55 states and 78 transitions. [2019-11-16 00:33:15,561 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-16 00:33:15,562 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 23 [2019-11-16 00:33:15,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-16 00:33:15,565 INFO L225 Difference]: With dead ends: 55 [2019-11-16 00:33:15,565 INFO L226 Difference]: Without dead ends: 51 [2019-11-16 00:33:15,565 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2019-11-16 00:33:15,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2019-11-16 00:33:15,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 48. [2019-11-16 00:33:15,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2019-11-16 00:33:15,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 68 transitions. [2019-11-16 00:33:15,592 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 68 transitions. Word has length 23 [2019-11-16 00:33:15,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-16 00:33:15,594 INFO L462 AbstractCegarLoop]: Abstraction has 48 states and 68 transitions. [2019-11-16 00:33:15,594 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-16 00:33:15,595 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 68 transitions. [2019-11-16 00:33:15,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2019-11-16 00:33:15,598 INFO L372 BasicCegarLoop]: Found error trace [2019-11-16 00:33:15,599 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-16 00:33:15,808 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-16 00:33:15,808 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-16 00:33:15,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-16 00:33:15,809 INFO L82 PathProgramCache]: Analyzing trace with hash -649262923, now seen corresponding path program 1 times [2019-11-16 00:33:15,809 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-16 00:33:15,809 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691691648] [2019-11-16 00:33:15,809 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:33:15,810 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:33:15,810 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-16 00:33:15,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:33:15,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:33:15,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:33:15,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:33:15,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:33:15,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:33:15,970 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-16 00:33:15,971 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691691648] [2019-11-16 00:33:15,971 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1707361610] [2019-11-16 00:33:15,971 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_277018a0-c18c-476d-a32f-db5d10f82df4/bin/uautomizer/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-16 00:33:16,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:33:16,006 INFO L256 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-16 00:33:16,008 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-16 00:33:16,069 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-16 00:33:16,069 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-16 00:33:16,069 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2019-11-16 00:33:16,070 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611520222] [2019-11-16 00:33:16,070 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-16 00:33:16,070 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-16 00:33:16,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-16 00:33:16,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2019-11-16 00:33:16,071 INFO L87 Difference]: Start difference. First operand 48 states and 68 transitions. Second operand 14 states. [2019-11-16 00:33:16,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-16 00:33:16,537 INFO L93 Difference]: Finished difference Result 114 states and 187 transitions. [2019-11-16 00:33:16,538 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-11-16 00:33:16,538 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 35 [2019-11-16 00:33:16,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-16 00:33:16,541 INFO L225 Difference]: With dead ends: 114 [2019-11-16 00:33:16,541 INFO L226 Difference]: Without dead ends: 68 [2019-11-16 00:33:16,543 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2019-11-16 00:33:16,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2019-11-16 00:33:16,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 66. [2019-11-16 00:33:16,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2019-11-16 00:33:16,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 98 transitions. [2019-11-16 00:33:16,565 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 98 transitions. Word has length 35 [2019-11-16 00:33:16,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-16 00:33:16,565 INFO L462 AbstractCegarLoop]: Abstraction has 66 states and 98 transitions. [2019-11-16 00:33:16,565 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-16 00:33:16,565 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 98 transitions. [2019-11-16 00:33:16,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2019-11-16 00:33:16,568 INFO L372 BasicCegarLoop]: Found error trace [2019-11-16 00:33:16,568 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-16 00:33:16,771 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-16 00:33:16,772 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-16 00:33:16,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-16 00:33:16,772 INFO L82 PathProgramCache]: Analyzing trace with hash 2000747716, now seen corresponding path program 1 times [2019-11-16 00:33:16,772 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-16 00:33:16,773 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547510768] [2019-11-16 00:33:16,773 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:33:16,773 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:33:16,773 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-16 00:33:16,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:33:16,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:33:16,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:33:16,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:33:16,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:33:16,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:33:16,935 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-11-16 00:33:16,935 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547510768] [2019-11-16 00:33:16,936 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1216064318] [2019-11-16 00:33:16,936 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_277018a0-c18c-476d-a32f-db5d10f82df4/bin/uautomizer/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-16 00:33:16,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:33:16,973 INFO L256 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-16 00:33:16,975 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-16 00:33:17,058 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-16 00:33:17,059 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-16 00:33:17,059 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 14 [2019-11-16 00:33:17,059 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035188472] [2019-11-16 00:33:17,060 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-16 00:33:17,060 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-16 00:33:17,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-16 00:33:17,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2019-11-16 00:33:17,060 INFO L87 Difference]: Start difference. First operand 66 states and 98 transitions. Second operand 14 states. [2019-11-16 00:33:17,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-16 00:33:17,320 INFO L93 Difference]: Finished difference Result 147 states and 239 transitions. [2019-11-16 00:33:17,321 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-16 00:33:17,321 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 36 [2019-11-16 00:33:17,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-16 00:33:17,323 INFO L225 Difference]: With dead ends: 147 [2019-11-16 00:33:17,323 INFO L226 Difference]: Without dead ends: 83 [2019-11-16 00:33:17,326 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2019-11-16 00:33:17,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2019-11-16 00:33:17,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 66. [2019-11-16 00:33:17,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2019-11-16 00:33:17,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 96 transitions. [2019-11-16 00:33:17,339 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 96 transitions. Word has length 36 [2019-11-16 00:33:17,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-16 00:33:17,339 INFO L462 AbstractCegarLoop]: Abstraction has 66 states and 96 transitions. [2019-11-16 00:33:17,339 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-16 00:33:17,340 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 96 transitions. [2019-11-16 00:33:17,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2019-11-16 00:33:17,342 INFO L372 BasicCegarLoop]: Found error trace [2019-11-16 00:33:17,342 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-16 00:33:17,555 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-16 00:33:17,555 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-16 00:33:17,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-16 00:33:17,556 INFO L82 PathProgramCache]: Analyzing trace with hash -434541687, now seen corresponding path program 1 times [2019-11-16 00:33:17,556 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-16 00:33:17,556 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176913821] [2019-11-16 00:33:17,556 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:33:17,556 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:33:17,556 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-16 00:33:17,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:33:17,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:33:17,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:33:17,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:33:17,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:33:17,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:33:17,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:33:17,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:33:17,807 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2019-11-16 00:33:17,808 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176913821] [2019-11-16 00:33:17,808 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1397317409] [2019-11-16 00:33:17,808 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_277018a0-c18c-476d-a32f-db5d10f82df4/bin/uautomizer/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-16 00:33:17,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:33:17,858 INFO L256 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-16 00:33:17,861 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-16 00:33:17,922 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-11-16 00:33:17,923 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-16 00:33:17,923 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8] total 17 [2019-11-16 00:33:17,923 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909122063] [2019-11-16 00:33:17,924 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-11-16 00:33:17,924 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-16 00:33:17,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-11-16 00:33:17,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2019-11-16 00:33:17,924 INFO L87 Difference]: Start difference. First operand 66 states and 96 transitions. Second operand 17 states. [2019-11-16 00:33:18,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-16 00:33:18,254 INFO L93 Difference]: Finished difference Result 163 states and 263 transitions. [2019-11-16 00:33:18,255 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-11-16 00:33:18,255 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 50 [2019-11-16 00:33:18,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-16 00:33:18,257 INFO L225 Difference]: With dead ends: 163 [2019-11-16 00:33:18,258 INFO L226 Difference]: Without dead ends: 99 [2019-11-16 00:33:18,259 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2019-11-16 00:33:18,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2019-11-16 00:33:18,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 91. [2019-11-16 00:33:18,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2019-11-16 00:33:18,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 143 transitions. [2019-11-16 00:33:18,275 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 143 transitions. Word has length 50 [2019-11-16 00:33:18,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-16 00:33:18,275 INFO L462 AbstractCegarLoop]: Abstraction has 91 states and 143 transitions. [2019-11-16 00:33:18,275 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-11-16 00:33:18,275 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 143 transitions. [2019-11-16 00:33:18,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2019-11-16 00:33:18,278 INFO L372 BasicCegarLoop]: Found error trace [2019-11-16 00:33:18,278 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-16 00:33:18,492 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-16 00:33:18,494 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-16 00:33:18,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-16 00:33:18,495 INFO L82 PathProgramCache]: Analyzing trace with hash -751947822, now seen corresponding path program 1 times [2019-11-16 00:33:18,495 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-16 00:33:18,495 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242791908] [2019-11-16 00:33:18,495 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:33:18,495 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:33:18,495 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-16 00:33:18,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:33:18,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:33:18,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:33:18,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:33:18,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:33:18,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:33:18,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:33:18,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:33:18,671 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 19 proven. 11 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-11-16 00:33:18,672 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242791908] [2019-11-16 00:33:18,672 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1199772673] [2019-11-16 00:33:18,672 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_277018a0-c18c-476d-a32f-db5d10f82df4/bin/uautomizer/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-16 00:33:18,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:33:18,711 INFO L256 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-16 00:33:18,713 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-16 00:33:18,758 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 18 proven. 5 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2019-11-16 00:33:18,759 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-16 00:33:18,759 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 7] total 15 [2019-11-16 00:33:18,759 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364331013] [2019-11-16 00:33:18,760 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-11-16 00:33:18,760 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-16 00:33:18,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-11-16 00:33:18,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2019-11-16 00:33:18,760 INFO L87 Difference]: Start difference. First operand 91 states and 143 transitions. Second operand 15 states. [2019-11-16 00:33:19,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-16 00:33:19,062 INFO L93 Difference]: Finished difference Result 182 states and 293 transitions. [2019-11-16 00:33:19,063 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-11-16 00:33:19,063 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 51 [2019-11-16 00:33:19,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-16 00:33:19,065 INFO L225 Difference]: With dead ends: 182 [2019-11-16 00:33:19,065 INFO L226 Difference]: Without dead ends: 91 [2019-11-16 00:33:19,066 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2019-11-16 00:33:19,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2019-11-16 00:33:19,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 83. [2019-11-16 00:33:19,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2019-11-16 00:33:19,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 123 transitions. [2019-11-16 00:33:19,079 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 123 transitions. Word has length 51 [2019-11-16 00:33:19,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-16 00:33:19,079 INFO L462 AbstractCegarLoop]: Abstraction has 83 states and 123 transitions. [2019-11-16 00:33:19,079 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-11-16 00:33:19,080 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 123 transitions. [2019-11-16 00:33:19,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2019-11-16 00:33:19,083 INFO L372 BasicCegarLoop]: Found error trace [2019-11-16 00:33:19,083 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2019-11-16 00:33:19,291 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-16 00:33:19,291 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-16 00:33:19,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-16 00:33:19,291 INFO L82 PathProgramCache]: Analyzing trace with hash 629760405, now seen corresponding path program 2 times [2019-11-16 00:33:19,291 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-16 00:33:19,291 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321076745] [2019-11-16 00:33:19,292 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:33:19,292 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:33:19,292 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-16 00:33:19,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:33:19,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:33:19,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:33:19,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:33:19,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:33:19,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:33:19,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:33:19,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:33:19,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:33:19,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:33:19,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:33:19,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:33:19,620 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 31 proven. 51 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2019-11-16 00:33:19,620 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321076745] [2019-11-16 00:33:19,621 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1204080042] [2019-11-16 00:33:19,621 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_277018a0-c18c-476d-a32f-db5d10f82df4/bin/uautomizer/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-16 00:33:19,676 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-16 00:33:19,676 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-16 00:33:19,677 INFO L256 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-16 00:33:19,686 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-16 00:33:19,805 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 44 proven. 17 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2019-11-16 00:33:19,805 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-16 00:33:19,806 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 9] total 22 [2019-11-16 00:33:19,806 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674724663] [2019-11-16 00:33:19,808 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-11-16 00:33:19,812 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-16 00:33:19,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-11-16 00:33:19,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2019-11-16 00:33:19,813 INFO L87 Difference]: Start difference. First operand 83 states and 123 transitions. Second operand 22 states. [2019-11-16 00:33:20,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-16 00:33:20,276 INFO L93 Difference]: Finished difference Result 189 states and 316 transitions. [2019-11-16 00:33:20,276 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-11-16 00:33:20,276 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 78 [2019-11-16 00:33:20,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-16 00:33:20,278 INFO L225 Difference]: With dead ends: 189 [2019-11-16 00:33:20,278 INFO L226 Difference]: Without dead ends: 100 [2019-11-16 00:33:20,280 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 94 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=119, Invalid=637, Unknown=0, NotChecked=0, Total=756 [2019-11-16 00:33:20,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2019-11-16 00:33:20,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 87. [2019-11-16 00:33:20,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2019-11-16 00:33:20,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 120 transitions. [2019-11-16 00:33:20,290 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 120 transitions. Word has length 78 [2019-11-16 00:33:20,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-16 00:33:20,291 INFO L462 AbstractCegarLoop]: Abstraction has 87 states and 120 transitions. [2019-11-16 00:33:20,291 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-11-16 00:33:20,291 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 120 transitions. [2019-11-16 00:33:20,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2019-11-16 00:33:20,292 INFO L372 BasicCegarLoop]: Found error trace [2019-11-16 00:33:20,293 INFO L380 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-16 00:33:20,495 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-16 00:33:20,495 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-16 00:33:20,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-16 00:33:20,495 INFO L82 PathProgramCache]: Analyzing trace with hash -26046796, now seen corresponding path program 1 times [2019-11-16 00:33:20,496 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-16 00:33:20,496 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641986312] [2019-11-16 00:33:20,496 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:33:20,496 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:33:20,496 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-16 00:33:20,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-16 00:33:20,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-16 00:33:20,531 INFO L168 tionRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-16 00:33:20,533 INFO L445 BasicCegarLoop]: Counterexample might be feasible [2019-11-16 00:33:20,570 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.11 12:33:20 BoogieIcfgContainer [2019-11-16 00:33:20,570 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-16 00:33:20,570 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-16 00:33:20,570 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-16 00:33:20,571 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-16 00:33:20,571 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 12:33:13" (3/4) ... [2019-11-16 00:33:20,573 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-11-16 00:33:20,639 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_277018a0-c18c-476d-a32f-db5d10f82df4/bin/uautomizer/witness.graphml [2019-11-16 00:33:20,640 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-16 00:33:20,641 INFO L168 Benchmark]: Toolchain (without parser) took 7679.32 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 172.0 MB). Free memory was 951.4 MB in the beginning and 950.3 MB in the end (delta: 1.2 MB). Peak memory consumption was 173.1 MB. Max. memory is 11.5 GB. [2019-11-16 00:33:20,642 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 1.0 GB. Free memory is still 967.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-16 00:33:20,642 INFO L168 Benchmark]: CACSL2BoogieTranslator took 249.05 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 135.8 MB). Free memory was 951.4 MB in the beginning and 1.1 GB in the end (delta: -177.9 MB). Peak memory consumption was 23.0 MB. Max. memory is 11.5 GB. [2019-11-16 00:33:20,642 INFO L168 Benchmark]: Boogie Procedure Inliner took 26.62 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-16 00:33:20,642 INFO L168 Benchmark]: Boogie Preprocessor took 13.30 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-16 00:33:20,643 INFO L168 Benchmark]: RCFGBuilder took 342.81 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 17.0 MB). Peak memory consumption was 17.0 MB. Max. memory is 11.5 GB. [2019-11-16 00:33:20,643 INFO L168 Benchmark]: TraceAbstraction took 6974.00 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 36.2 MB). Free memory was 1.1 GB in the beginning and 958.2 MB in the end (delta: 154.2 MB). Peak memory consumption was 190.3 MB. Max. memory is 11.5 GB. [2019-11-16 00:33:20,644 INFO L168 Benchmark]: Witness Printer took 69.37 ms. Allocated memory is still 1.2 GB. Free memory was 958.2 MB in the beginning and 950.3 MB in the end (delta: 7.9 MB). Peak memory consumption was 7.9 MB. Max. memory is 11.5 GB. [2019-11-16 00:33:20,645 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 1.0 GB. Free memory is still 967.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 249.05 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 135.8 MB). Free memory was 951.4 MB in the beginning and 1.1 GB in the end (delta: -177.9 MB). Peak memory consumption was 23.0 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 26.62 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 13.30 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 342.81 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 17.0 MB). Peak memory consumption was 17.0 MB. Max. memory is 11.5 GB. * TraceAbstraction took 6974.00 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 36.2 MB). Free memory was 1.1 GB in the beginning and 958.2 MB in the end (delta: 154.2 MB). Peak memory consumption was 190.3 MB. Max. memory is 11.5 GB. * Witness Printer took 69.37 ms. Allocated memory is still 1.2 GB. Free memory was 958.2 MB in the beginning and 950.3 MB in the end (delta: 7.9 MB). Peak memory consumption was 7.9 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 = 4; [L37] CALL, EXPR fibo1(x) VAL [\old(n)=4] [L8] COND FALSE !(n < 1) VAL [\old(n)=4, n=4] [L10] COND FALSE !(n == 1) VAL [\old(n)=4, n=4] [L13] CALL, EXPR fibo2(n-1) 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-1) VAL [\old(n)=4, fibo2(n-1)=2, n=4] [L13] CALL, EXPR fibo2(n-2) 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-2) VAL [\old(n)=4, fibo2(n-1)=2, fibo2(n-2)=1, n=4] [L13] return fibo2(n-1) + fibo2(n-2); [L37] RET, EXPR fibo1(x) [L37] int result = fibo1(x); [L38] COND TRUE result == 3 [L39] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 28 locations, 1 error locations. Result: UNSAFE, OverallTime: 6.9s, OverallIterations: 10, TraceHistogramMax: 6, AutomataDifference: 2.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 210 SDtfs, 373 SDslu, 1380 SDs, 0 SdLazy, 2114 SolverSat, 292 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 503 GetRequests, 366 SyntacticMatches, 1 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 1.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=91occurred in iteration=7, 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, 9 MinimizatonAttempts, 55 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 2.0s InterpolantComputationTime, 673 NumberOfCodeBlocks, 673 NumberOfCodeBlocksAsserted, 18 NumberOfCheckSat, 593 ConstructedInterpolants, 0 QuantifiedInterpolants, 60425 SizeOfPredicates, 25 NumberOfNonLiveVariables, 676 ConjunctsInSsa, 51 ConjunctsInUnsatCore, 16 InterpolantComputations, 2 PerfectInterpolantSequences, 378/526 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...