./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive-simple/fibo_2calls_6-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 678e0110 Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_03e90829-58c8-4747-b969-009b0d4f6fda/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_03e90829-58c8-4747-b969-009b0d4f6fda/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_03e90829-58c8-4747-b969-009b0d4f6fda/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_03e90829-58c8-4747-b969-009b0d4f6fda/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive-simple/fibo_2calls_6-1.c -s /tmp/vcloud-vcloud-master/worker/run_dir_03e90829-58c8-4747-b969-009b0d4f6fda/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_03e90829-58c8-4747-b969-009b0d4f6fda/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 595c6555624af5bbcf79585a20acb2500e3eeee8 .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.24-678e011 [2019-11-20 00:38:34,084 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-20 00:38:34,086 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-20 00:38:34,099 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-20 00:38:34,100 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-20 00:38:34,101 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-20 00:38:34,103 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-20 00:38:34,114 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-20 00:38:34,116 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-20 00:38:34,117 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-20 00:38:34,118 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-20 00:38:34,119 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-20 00:38:34,120 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-20 00:38:34,120 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-20 00:38:34,121 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-20 00:38:34,122 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-20 00:38:34,123 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-20 00:38:34,124 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-20 00:38:34,125 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-20 00:38:34,132 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-20 00:38:34,133 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-20 00:38:34,134 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-20 00:38:34,136 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-20 00:38:34,140 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-20 00:38:34,143 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-20 00:38:34,143 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-20 00:38:34,143 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-20 00:38:34,144 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-20 00:38:34,144 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-20 00:38:34,145 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-20 00:38:34,146 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-20 00:38:34,146 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-20 00:38:34,147 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-20 00:38:34,147 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-20 00:38:34,148 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-20 00:38:34,149 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-20 00:38:34,149 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-20 00:38:34,149 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-20 00:38:34,150 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-20 00:38:34,150 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-20 00:38:34,151 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-20 00:38:34,152 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_03e90829-58c8-4747-b969-009b0d4f6fda/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-20 00:38:34,165 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-20 00:38:34,165 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-20 00:38:34,166 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-20 00:38:34,166 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-20 00:38:34,167 INFO L138 SettingsManager]: * Use SBE=true [2019-11-20 00:38:34,167 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-20 00:38:34,167 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-20 00:38:34,167 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-20 00:38:34,168 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-20 00:38:34,168 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-20 00:38:34,168 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-20 00:38:34,168 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-20 00:38:34,169 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-20 00:38:34,169 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-20 00:38:34,169 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-20 00:38:34,169 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-20 00:38:34,170 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-20 00:38:34,170 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-20 00:38:34,170 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-20 00:38:34,170 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-20 00:38:34,171 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-20 00:38:34,171 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-20 00:38:34,171 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-20 00:38:34,172 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-20 00:38:34,172 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-20 00:38:34,172 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-20 00:38:34,172 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-20 00:38:34,173 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-20 00:38:34,173 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_03e90829-58c8-4747-b969-009b0d4f6fda/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 -> 595c6555624af5bbcf79585a20acb2500e3eeee8 [2019-11-20 00:38:34,313 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-20 00:38:34,323 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-20 00:38:34,326 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-20 00:38:34,327 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-20 00:38:34,328 INFO L275 PluginConnector]: CDTParser initialized [2019-11-20 00:38:34,328 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_03e90829-58c8-4747-b969-009b0d4f6fda/bin/uautomizer/../../sv-benchmarks/c/recursive-simple/fibo_2calls_6-1.c [2019-11-20 00:38:34,376 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_03e90829-58c8-4747-b969-009b0d4f6fda/bin/uautomizer/data/375f10f1c/c366d74c7e0d40199b611ef66420c6ab/FLAG5d19d7c50 [2019-11-20 00:38:34,749 INFO L306 CDTParser]: Found 1 translation units. [2019-11-20 00:38:34,750 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_03e90829-58c8-4747-b969-009b0d4f6fda/sv-benchmarks/c/recursive-simple/fibo_2calls_6-1.c [2019-11-20 00:38:34,756 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_03e90829-58c8-4747-b969-009b0d4f6fda/bin/uautomizer/data/375f10f1c/c366d74c7e0d40199b611ef66420c6ab/FLAG5d19d7c50 [2019-11-20 00:38:34,770 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_03e90829-58c8-4747-b969-009b0d4f6fda/bin/uautomizer/data/375f10f1c/c366d74c7e0d40199b611ef66420c6ab [2019-11-20 00:38:34,773 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-20 00:38:34,774 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-20 00:38:34,776 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-20 00:38:34,776 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-20 00:38:34,779 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-20 00:38:34,779 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 12:38:34" (1/1) ... [2019-11-20 00:38:34,782 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2b3c7c74 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:38:34, skipping insertion in model container [2019-11-20 00:38:34,782 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 12:38:34" (1/1) ... [2019-11-20 00:38:34,789 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-20 00:38:34,806 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-20 00:38:34,999 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-20 00:38:35,005 INFO L188 MainTranslator]: Completed pre-run [2019-11-20 00:38:35,123 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-20 00:38:35,136 INFO L192 MainTranslator]: Completed translation [2019-11-20 00:38:35,136 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:38:35 WrapperNode [2019-11-20 00:38:35,136 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-20 00:38:35,137 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-20 00:38:35,137 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-20 00:38:35,138 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-20 00:38:35,146 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:38:35" (1/1) ... [2019-11-20 00:38:35,150 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:38:35" (1/1) ... [2019-11-20 00:38:35,165 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-20 00:38:35,166 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-20 00:38:35,166 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-20 00:38:35,166 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-20 00:38:35,174 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:38:35" (1/1) ... [2019-11-20 00:38:35,174 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:38:35" (1/1) ... [2019-11-20 00:38:35,175 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:38:35" (1/1) ... [2019-11-20 00:38:35,175 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:38:35" (1/1) ... [2019-11-20 00:38:35,177 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:38:35" (1/1) ... [2019-11-20 00:38:35,179 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:38:35" (1/1) ... [2019-11-20 00:38:35,180 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:38:35" (1/1) ... [2019-11-20 00:38:35,181 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-20 00:38:35,182 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-20 00:38:35,182 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-20 00:38:35,182 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-20 00:38:35,183 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:38:35" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_03e90829-58c8-4747-b969-009b0d4f6fda/bin/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-20 00:38:35,232 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-20 00:38:35,232 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-20 00:38:35,233 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2019-11-20 00:38:35,234 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2019-11-20 00:38:35,234 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2019-11-20 00:38:35,235 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2019-11-20 00:38:35,401 INFO L280 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-20 00:38:35,401 INFO L285 CfgBuilder]: Removed 4 assume(true) statements. [2019-11-20 00:38:35,403 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 12:38:35 BoogieIcfgContainer [2019-11-20 00:38:35,403 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-20 00:38:35,404 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-20 00:38:35,404 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-20 00:38:35,407 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-20 00:38:35,407 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 12:38:34" (1/3) ... [2019-11-20 00:38:35,408 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58b2c41 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 12:38:35, skipping insertion in model container [2019-11-20 00:38:35,408 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:38:35" (2/3) ... [2019-11-20 00:38:35,408 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58b2c41 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 12:38:35, skipping insertion in model container [2019-11-20 00:38:35,409 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 12:38:35" (3/3) ... [2019-11-20 00:38:35,410 INFO L109 eAbstractionObserver]: Analyzing ICFG fibo_2calls_6-1.c [2019-11-20 00:38:35,423 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-20 00:38:35,441 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-20 00:38:35,451 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-20 00:38:35,489 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-20 00:38:35,489 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-20 00:38:35,490 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-20 00:38:35,490 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-20 00:38:35,490 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-20 00:38:35,490 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-20 00:38:35,490 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-20 00:38:35,490 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-20 00:38:35,517 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states. [2019-11-20 00:38:35,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-11-20 00:38:35,522 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 00:38:35,523 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 00:38:35,524 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 00:38:35,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 00:38:35,529 INFO L82 PathProgramCache]: Analyzing trace with hash 1871295635, now seen corresponding path program 1 times [2019-11-20 00:38:35,538 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 00:38:35,539 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95588221] [2019-11-20 00:38:35,539 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 00:38:35,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:38:35,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:38:35,698 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 00:38:35,698 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95588221] [2019-11-20 00:38:35,699 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-20 00:38:35,699 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-20 00:38:35,701 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885270282] [2019-11-20 00:38:35,704 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-20 00:38:35,704 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 00:38:35,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-20 00:38:35,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-20 00:38:35,719 INFO L87 Difference]: Start difference. First operand 28 states. Second operand 5 states. [2019-11-20 00:38:35,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 00:38:35,826 INFO L93 Difference]: Finished difference Result 38 states and 47 transitions. [2019-11-20 00:38:35,827 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-20 00:38:35,828 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2019-11-20 00:38:35,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 00:38:35,835 INFO L225 Difference]: With dead ends: 38 [2019-11-20 00:38:35,835 INFO L226 Difference]: Without dead ends: 26 [2019-11-20 00:38:35,838 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-20 00:38:35,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-11-20 00:38:35,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2019-11-20 00:38:35,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-11-20 00:38:35,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 33 transitions. [2019-11-20 00:38:35,878 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 33 transitions. Word has length 9 [2019-11-20 00:38:35,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 00:38:35,878 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 33 transitions. [2019-11-20 00:38:35,879 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-20 00:38:35,879 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 33 transitions. [2019-11-20 00:38:35,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-20 00:38:35,880 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 00:38:35,881 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 00:38:35,881 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 00:38:35,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 00:38:35,881 INFO L82 PathProgramCache]: Analyzing trace with hash -1404217650, now seen corresponding path program 1 times [2019-11-20 00:38:35,881 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 00:38:35,882 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862816323] [2019-11-20 00:38:35,882 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 00:38:35,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:38:35,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:38:35,925 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 00:38:35,925 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862816323] [2019-11-20 00:38:35,926 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-20 00:38:35,926 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-20 00:38:35,926 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969578046] [2019-11-20 00:38:35,927 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-20 00:38:35,928 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 00:38:35,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-20 00:38:35,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-20 00:38:35,928 INFO L87 Difference]: Start difference. First operand 26 states and 33 transitions. Second operand 5 states. [2019-11-20 00:38:36,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 00:38:36,001 INFO L93 Difference]: Finished difference Result 32 states and 40 transitions. [2019-11-20 00:38:36,001 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-20 00:38:36,001 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2019-11-20 00:38:36,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 00:38:36,003 INFO L225 Difference]: With dead ends: 32 [2019-11-20 00:38:36,003 INFO L226 Difference]: Without dead ends: 28 [2019-11-20 00:38:36,004 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-20 00:38:36,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-11-20 00:38:36,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 26. [2019-11-20 00:38:36,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-11-20 00:38:36,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 33 transitions. [2019-11-20 00:38:36,011 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 33 transitions. Word has length 10 [2019-11-20 00:38:36,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 00:38:36,011 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 33 transitions. [2019-11-20 00:38:36,011 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-20 00:38:36,011 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 33 transitions. [2019-11-20 00:38:36,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-11-20 00:38:36,012 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 00:38:36,013 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 00:38:36,013 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 00:38:36,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 00:38:36,013 INFO L82 PathProgramCache]: Analyzing trace with hash -1629927371, now seen corresponding path program 1 times [2019-11-20 00:38:36,013 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 00:38:36,014 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369745697] [2019-11-20 00:38:36,014 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 00:38:36,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:38:36,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:38:36,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:38:36,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:38:36,161 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-20 00:38:36,162 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369745697] [2019-11-20 00:38:36,162 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [15686556] [2019-11-20 00:38:36,162 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_03e90829-58c8-4747-b969-009b0d4f6fda/bin/uautomizer/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 00:38:36,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:38:36,201 INFO L255 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-20 00:38:36,206 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 00:38:36,280 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-20 00:38:36,280 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 00:38:36,280 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2019-11-20 00:38:36,280 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140510089] [2019-11-20 00:38:36,281 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-20 00:38:36,281 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 00:38:36,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-20 00:38:36,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2019-11-20 00:38:36,282 INFO L87 Difference]: Start difference. First operand 26 states and 33 transitions. Second operand 10 states. [2019-11-20 00:38:36,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 00:38:36,451 INFO L93 Difference]: Finished difference Result 59 states and 83 transitions. [2019-11-20 00:38:36,453 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-20 00:38:36,453 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 22 [2019-11-20 00:38:36,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 00:38:36,455 INFO L225 Difference]: With dead ends: 59 [2019-11-20 00:38:36,455 INFO L226 Difference]: Without dead ends: 35 [2019-11-20 00:38:36,456 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2019-11-20 00:38:36,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-11-20 00:38:36,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 33. [2019-11-20 00:38:36,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-11-20 00:38:36,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 42 transitions. [2019-11-20 00:38:36,470 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 42 transitions. Word has length 22 [2019-11-20 00:38:36,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 00:38:36,471 INFO L462 AbstractCegarLoop]: Abstraction has 33 states and 42 transitions. [2019-11-20 00:38:36,471 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-20 00:38:36,471 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 42 transitions. [2019-11-20 00:38:36,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-11-20 00:38:36,474 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 00:38:36,475 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 00:38:36,678 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 00:38:36,679 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 00:38:36,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 00:38:36,679 INFO L82 PathProgramCache]: Analyzing trace with hash 1285987244, now seen corresponding path program 1 times [2019-11-20 00:38:36,679 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 00:38:36,680 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061260160] [2019-11-20 00:38:36,680 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 00:38:36,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:38:36,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:38:36,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:38:36,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:38:36,791 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-20 00:38:36,792 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061260160] [2019-11-20 00:38:36,792 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [351562690] [2019-11-20 00:38:36,792 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_03e90829-58c8-4747-b969-009b0d4f6fda/bin/uautomizer/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 00:38:36,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:38:36,841 INFO L255 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-20 00:38:36,842 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 00:38:36,876 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-20 00:38:36,876 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 00:38:36,876 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2019-11-20 00:38:36,877 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461403114] [2019-11-20 00:38:36,877 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-20 00:38:36,877 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 00:38:36,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-20 00:38:36,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2019-11-20 00:38:36,878 INFO L87 Difference]: Start difference. First operand 33 states and 42 transitions. Second operand 10 states. [2019-11-20 00:38:37,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 00:38:37,069 INFO L93 Difference]: Finished difference Result 55 states and 78 transitions. [2019-11-20 00:38:37,069 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-20 00:38:37,070 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 23 [2019-11-20 00:38:37,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 00:38:37,073 INFO L225 Difference]: With dead ends: 55 [2019-11-20 00:38:37,073 INFO L226 Difference]: Without dead ends: 51 [2019-11-20 00:38:37,073 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2019-11-20 00:38:37,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2019-11-20 00:38:37,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 48. [2019-11-20 00:38:37,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2019-11-20 00:38:37,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 68 transitions. [2019-11-20 00:38:37,094 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 68 transitions. Word has length 23 [2019-11-20 00:38:37,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 00:38:37,095 INFO L462 AbstractCegarLoop]: Abstraction has 48 states and 68 transitions. [2019-11-20 00:38:37,095 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-20 00:38:37,095 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 68 transitions. [2019-11-20 00:38:37,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2019-11-20 00:38:37,104 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 00:38:37,104 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 00:38:37,308 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 00:38:37,308 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 00:38:37,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 00:38:37,308 INFO L82 PathProgramCache]: Analyzing trace with hash -649262923, now seen corresponding path program 1 times [2019-11-20 00:38:37,309 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 00:38:37,309 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78252969] [2019-11-20 00:38:37,309 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 00:38:37,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:38:37,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:38:37,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:38:37,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:38:37,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:38:37,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:38:37,431 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-20 00:38:37,431 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78252969] [2019-11-20 00:38:37,431 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [174029444] [2019-11-20 00:38:37,431 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_03e90829-58c8-4747-b969-009b0d4f6fda/bin/uautomizer/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 00:38:37,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:38:37,470 INFO L255 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-20 00:38:37,472 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 00:38:37,542 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-20 00:38:37,543 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 00:38:37,543 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2019-11-20 00:38:37,543 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082261852] [2019-11-20 00:38:37,544 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-20 00:38:37,544 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 00:38:37,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-20 00:38:37,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2019-11-20 00:38:37,545 INFO L87 Difference]: Start difference. First operand 48 states and 68 transitions. Second operand 12 states. [2019-11-20 00:38:37,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 00:38:37,920 INFO L93 Difference]: Finished difference Result 114 states and 187 transitions. [2019-11-20 00:38:37,921 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-11-20 00:38:37,921 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 35 [2019-11-20 00:38:37,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 00:38:37,924 INFO L225 Difference]: With dead ends: 114 [2019-11-20 00:38:37,924 INFO L226 Difference]: Without dead ends: 68 [2019-11-20 00:38:37,926 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=78, Invalid=302, Unknown=0, NotChecked=0, Total=380 [2019-11-20 00:38:37,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2019-11-20 00:38:37,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 66. [2019-11-20 00:38:37,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2019-11-20 00:38:37,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 98 transitions. [2019-11-20 00:38:37,941 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 98 transitions. Word has length 35 [2019-11-20 00:38:37,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 00:38:37,941 INFO L462 AbstractCegarLoop]: Abstraction has 66 states and 98 transitions. [2019-11-20 00:38:37,941 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-20 00:38:37,941 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 98 transitions. [2019-11-20 00:38:37,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2019-11-20 00:38:37,943 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 00:38:37,943 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 00:38:38,148 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 00:38:38,148 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 00:38:38,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 00:38:38,149 INFO L82 PathProgramCache]: Analyzing trace with hash 2000747716, now seen corresponding path program 1 times [2019-11-20 00:38:38,149 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 00:38:38,149 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142876282] [2019-11-20 00:38:38,149 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 00:38:38,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:38:38,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:38:38,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:38:38,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:38:38,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:38:38,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:38:38,306 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-11-20 00:38:38,307 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142876282] [2019-11-20 00:38:38,307 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1977890910] [2019-11-20 00:38:38,307 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_03e90829-58c8-4747-b969-009b0d4f6fda/bin/uautomizer/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 00:38:38,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:38:38,357 INFO L255 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-20 00:38:38,361 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 00:38:38,424 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-20 00:38:38,424 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 00:38:38,424 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 12 [2019-11-20 00:38:38,425 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812499670] [2019-11-20 00:38:38,425 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-20 00:38:38,425 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 00:38:38,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-20 00:38:38,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2019-11-20 00:38:38,426 INFO L87 Difference]: Start difference. First operand 66 states and 98 transitions. Second operand 12 states. [2019-11-20 00:38:38,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 00:38:38,719 INFO L93 Difference]: Finished difference Result 147 states and 239 transitions. [2019-11-20 00:38:38,720 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-20 00:38:38,720 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 36 [2019-11-20 00:38:38,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 00:38:38,722 INFO L225 Difference]: With dead ends: 147 [2019-11-20 00:38:38,723 INFO L226 Difference]: Without dead ends: 83 [2019-11-20 00:38:38,725 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2019-11-20 00:38:38,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2019-11-20 00:38:38,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 66. [2019-11-20 00:38:38,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2019-11-20 00:38:38,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 96 transitions. [2019-11-20 00:38:38,747 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 96 transitions. Word has length 36 [2019-11-20 00:38:38,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 00:38:38,748 INFO L462 AbstractCegarLoop]: Abstraction has 66 states and 96 transitions. [2019-11-20 00:38:38,748 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-20 00:38:38,748 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 96 transitions. [2019-11-20 00:38:38,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2019-11-20 00:38:38,750 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 00:38:38,751 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 00:38:38,953 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 00:38:38,954 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 00:38:38,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 00:38:38,954 INFO L82 PathProgramCache]: Analyzing trace with hash -434541687, now seen corresponding path program 1 times [2019-11-20 00:38:38,954 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 00:38:38,955 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167990969] [2019-11-20 00:38:38,955 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 00:38:38,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:38:38,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:38:39,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:38:39,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:38:39,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:38:39,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:38:39,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:38:39,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:38:39,191 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2019-11-20 00:38:39,191 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167990969] [2019-11-20 00:38:39,191 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [330341976] [2019-11-20 00:38:39,192 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_03e90829-58c8-4747-b969-009b0d4f6fda/bin/uautomizer/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 00:38:39,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:38:39,230 INFO L255 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-20 00:38:39,239 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 00:38:39,339 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-11-20 00:38:39,340 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 00:38:39,340 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 16 [2019-11-20 00:38:39,340 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923782094] [2019-11-20 00:38:39,341 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-11-20 00:38:39,341 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 00:38:39,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-11-20 00:38:39,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2019-11-20 00:38:39,341 INFO L87 Difference]: Start difference. First operand 66 states and 96 transitions. Second operand 16 states. [2019-11-20 00:38:39,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 00:38:39,812 INFO L93 Difference]: Finished difference Result 164 states and 279 transitions. [2019-11-20 00:38:39,813 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-11-20 00:38:39,813 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 50 [2019-11-20 00:38:39,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 00:38:39,815 INFO L225 Difference]: With dead ends: 164 [2019-11-20 00:38:39,815 INFO L226 Difference]: Without dead ends: 100 [2019-11-20 00:38:39,817 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=111, Invalid=489, Unknown=0, NotChecked=0, Total=600 [2019-11-20 00:38:39,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2019-11-20 00:38:39,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 89. [2019-11-20 00:38:39,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2019-11-20 00:38:39,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 145 transitions. [2019-11-20 00:38:39,832 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 145 transitions. Word has length 50 [2019-11-20 00:38:39,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 00:38:39,833 INFO L462 AbstractCegarLoop]: Abstraction has 89 states and 145 transitions. [2019-11-20 00:38:39,833 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-11-20 00:38:39,833 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 145 transitions. [2019-11-20 00:38:39,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2019-11-20 00:38:39,837 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 00:38:39,837 INFO L410 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 00:38:40,040 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 00:38:40,041 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 00:38:40,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 00:38:40,041 INFO L82 PathProgramCache]: Analyzing trace with hash -1917551255, now seen corresponding path program 1 times [2019-11-20 00:38:40,041 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 00:38:40,041 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018214004] [2019-11-20 00:38:40,041 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 00:38:40,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:38:40,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:38:40,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:38:40,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:38:40,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:38:40,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:38:40,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:38:40,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:38:40,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:38:40,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:38:40,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:38:40,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:38:40,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:38:40,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:38:40,407 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 33 proven. 58 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2019-11-20 00:38:40,408 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018214004] [2019-11-20 00:38:40,409 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [602144143] [2019-11-20 00:38:40,409 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_03e90829-58c8-4747-b969-009b0d4f6fda/bin/uautomizer/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 00:38:40,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:38:40,471 INFO L255 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-20 00:38:40,479 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 00:38:40,654 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 13 proven. 90 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2019-11-20 00:38:40,654 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 00:38:40,654 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 18 [2019-11-20 00:38:40,654 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23956566] [2019-11-20 00:38:40,655 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-11-20 00:38:40,655 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 00:38:40,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-11-20 00:38:40,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2019-11-20 00:38:40,656 INFO L87 Difference]: Start difference. First operand 89 states and 145 transitions. Second operand 18 states. [2019-11-20 00:38:41,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 00:38:41,206 INFO L93 Difference]: Finished difference Result 207 states and 388 transitions. [2019-11-20 00:38:41,206 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-11-20 00:38:41,207 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 91 [2019-11-20 00:38:41,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 00:38:41,209 INFO L225 Difference]: With dead ends: 207 [2019-11-20 00:38:41,209 INFO L226 Difference]: Without dead ends: 114 [2019-11-20 00:38:41,211 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=143, Invalid=669, Unknown=0, NotChecked=0, Total=812 [2019-11-20 00:38:41,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2019-11-20 00:38:41,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 88. [2019-11-20 00:38:41,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2019-11-20 00:38:41,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 135 transitions. [2019-11-20 00:38:41,231 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 135 transitions. Word has length 91 [2019-11-20 00:38:41,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 00:38:41,232 INFO L462 AbstractCegarLoop]: Abstraction has 88 states and 135 transitions. [2019-11-20 00:38:41,232 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-11-20 00:38:41,232 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 135 transitions. [2019-11-20 00:38:41,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2019-11-20 00:38:41,237 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 00:38:41,237 INFO L410 BasicCegarLoop]: trace histogram [10, 10, 7, 7, 7, 7, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1] [2019-11-20 00:38:41,441 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 00:38:41,442 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 00:38:41,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 00:38:41,442 INFO L82 PathProgramCache]: Analyzing trace with hash -463941571, now seen corresponding path program 1 times [2019-11-20 00:38:41,442 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 00:38:41,443 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338672740] [2019-11-20 00:38:41,443 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 00:38:41,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:38:41,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:38:41,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:38:41,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:38:41,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:38:41,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:38:41,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:38:41,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:38:41,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:38:41,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:38:41,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:38:41,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:38:41,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:38:41,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:38:41,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:38:41,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:38:41,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:38:41,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:38:41,763 INFO L134 CoverageAnalysis]: Checked inductivity of 358 backedges. 53 proven. 117 refuted. 0 times theorem prover too weak. 188 trivial. 0 not checked. [2019-11-20 00:38:41,763 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338672740] [2019-11-20 00:38:41,764 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [418779517] [2019-11-20 00:38:41,764 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_03e90829-58c8-4747-b969-009b0d4f6fda/bin/uautomizer/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 00:38:41,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:38:41,832 INFO L255 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-20 00:38:41,836 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 00:38:41,953 INFO L134 CoverageAnalysis]: Checked inductivity of 358 backedges. 48 proven. 89 refuted. 0 times theorem prover too weak. 221 trivial. 0 not checked. [2019-11-20 00:38:41,953 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 00:38:41,954 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 9] total 18 [2019-11-20 00:38:41,956 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903118846] [2019-11-20 00:38:41,958 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-11-20 00:38:41,958 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 00:38:41,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-11-20 00:38:41,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2019-11-20 00:38:41,959 INFO L87 Difference]: Start difference. First operand 88 states and 135 transitions. Second operand 18 states. [2019-11-20 00:38:42,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 00:38:42,420 INFO L93 Difference]: Finished difference Result 209 states and 348 transitions. [2019-11-20 00:38:42,421 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-11-20 00:38:42,421 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 119 [2019-11-20 00:38:42,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 00:38:42,423 INFO L225 Difference]: With dead ends: 209 [2019-11-20 00:38:42,423 INFO L226 Difference]: Without dead ends: 121 [2019-11-20 00:38:42,425 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=117, Invalid=533, Unknown=0, NotChecked=0, Total=650 [2019-11-20 00:38:42,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2019-11-20 00:38:42,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 111. [2019-11-20 00:38:42,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2019-11-20 00:38:42,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 175 transitions. [2019-11-20 00:38:42,456 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 175 transitions. Word has length 119 [2019-11-20 00:38:42,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 00:38:42,457 INFO L462 AbstractCegarLoop]: Abstraction has 111 states and 175 transitions. [2019-11-20 00:38:42,457 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-11-20 00:38:42,457 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 175 transitions. [2019-11-20 00:38:42,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 269 [2019-11-20 00:38:42,463 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 00:38:42,464 INFO L410 BasicCegarLoop]: trace histogram [21, 21, 18, 18, 17, 14, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 8, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2019-11-20 00:38:42,666 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 00:38:42,669 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 00:38:42,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 00:38:42,670 INFO L82 PathProgramCache]: Analyzing trace with hash 1957575691, now seen corresponding path program 2 times [2019-11-20 00:38:42,670 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 00:38:42,670 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39138485] [2019-11-20 00:38:42,670 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 00:38:42,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:38:42,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:38:42,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:38:42,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:38:42,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:38:42,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:38:43,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:38:43,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:38:43,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:38:43,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:38:43,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:38:43,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:38:43,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:38:43,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:38:43,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:38:43,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:38:43,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:38:43,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:38:43,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:38:43,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:38:43,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:38:43,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:38:43,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:38:43,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:38:43,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:38:43,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:38:43,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:38:43,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:38:43,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:38:43,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:38:43,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:38:43,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:38:43,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:38:43,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:38:43,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:38:43,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:38:43,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:38:43,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:38:43,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:38:43,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:38:43,607 INFO L134 CoverageAnalysis]: Checked inductivity of 2003 backedges. 467 proven. 589 refuted. 0 times theorem prover too weak. 947 trivial. 0 not checked. [2019-11-20 00:38:43,607 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39138485] [2019-11-20 00:38:43,608 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [553427820] [2019-11-20 00:38:43,608 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_03e90829-58c8-4747-b969-009b0d4f6fda/bin/uautomizer/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 00:38:43,716 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-20 00:38:43,716 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 00:38:43,718 INFO L255 TraceCheckSpWp]: Trace formula consists of 597 conjuncts, 13 conjunts are in the unsatisfiable core [2019-11-20 00:38:43,723 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 00:38:43,887 INFO L134 CoverageAnalysis]: Checked inductivity of 2003 backedges. 174 proven. 310 refuted. 0 times theorem prover too weak. 1519 trivial. 0 not checked. [2019-11-20 00:38:43,887 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 00:38:43,888 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 11] total 28 [2019-11-20 00:38:43,888 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780031115] [2019-11-20 00:38:43,889 INFO L442 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-11-20 00:38:43,889 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 00:38:43,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-11-20 00:38:43,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=656, Unknown=0, NotChecked=0, Total=756 [2019-11-20 00:38:43,890 INFO L87 Difference]: Start difference. First operand 111 states and 175 transitions. Second operand 28 states. [2019-11-20 00:38:44,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 00:38:44,760 INFO L93 Difference]: Finished difference Result 310 states and 603 transitions. [2019-11-20 00:38:44,760 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2019-11-20 00:38:44,760 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 268 [2019-11-20 00:38:44,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 00:38:44,763 INFO L225 Difference]: With dead ends: 310 [2019-11-20 00:38:44,763 INFO L226 Difference]: Without dead ends: 165 [2019-11-20 00:38:44,765 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 393 GetRequests, 354 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 423 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=231, Invalid=1329, Unknown=0, NotChecked=0, Total=1560 [2019-11-20 00:38:44,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2019-11-20 00:38:44,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 112. [2019-11-20 00:38:44,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2019-11-20 00:38:44,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 167 transitions. [2019-11-20 00:38:44,795 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 167 transitions. Word has length 268 [2019-11-20 00:38:44,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 00:38:44,796 INFO L462 AbstractCegarLoop]: Abstraction has 112 states and 167 transitions. [2019-11-20 00:38:44,796 INFO L463 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-11-20 00:38:44,796 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 167 transitions. [2019-11-20 00:38:44,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2019-11-20 00:38:44,799 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 00:38:44,800 INFO L410 BasicCegarLoop]: trace histogram [17, 17, 14, 14, 13, 12, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 6, 4, 4, 2, 1, 1, 1, 1, 1, 1] [2019-11-20 00:38:45,011 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 00:38:45,012 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 00:38:45,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 00:38:45,012 INFO L82 PathProgramCache]: Analyzing trace with hash 1502984625, now seen corresponding path program 3 times [2019-11-20 00:38:45,012 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 00:38:45,017 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515521916] [2019-11-20 00:38:45,017 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 00:38:45,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:38:45,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:38:45,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:38:45,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:38:45,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:38:45,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:38:45,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:38:45,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:38:45,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:38:45,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:38:45,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:38:45,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:38:45,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:38:45,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:38:45,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:38:45,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:38:45,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:38:45,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:38:45,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:38:45,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:38:45,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:38:45,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:38:45,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:38:45,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:38:45,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:38:45,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:38:45,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:38:45,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:38:45,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:38:45,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:38:45,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:38:45,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:38:45,726 INFO L134 CoverageAnalysis]: Checked inductivity of 1248 backedges. 289 proven. 362 refuted. 0 times theorem prover too weak. 597 trivial. 0 not checked. [2019-11-20 00:38:45,727 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515521916] [2019-11-20 00:38:45,728 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [714389345] [2019-11-20 00:38:45,728 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_03e90829-58c8-4747-b969-009b0d4f6fda/bin/uautomizer/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 00:38:45,796 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-11-20 00:38:45,796 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 00:38:45,797 INFO L255 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 13 conjunts are in the unsatisfiable core [2019-11-20 00:38:45,801 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 00:38:45,986 INFO L134 CoverageAnalysis]: Checked inductivity of 1248 backedges. 661 proven. 42 refuted. 0 times theorem prover too weak. 545 trivial. 0 not checked. [2019-11-20 00:38:45,986 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 00:38:45,987 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 13] total 34 [2019-11-20 00:38:45,987 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009773199] [2019-11-20 00:38:45,987 INFO L442 AbstractCegarLoop]: Interpolant automaton has 34 states [2019-11-20 00:38:45,988 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 00:38:45,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2019-11-20 00:38:45,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=980, Unknown=0, NotChecked=0, Total=1122 [2019-11-20 00:38:45,988 INFO L87 Difference]: Start difference. First operand 112 states and 167 transitions. Second operand 34 states. [2019-11-20 00:38:46,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 00:38:46,802 INFO L93 Difference]: Finished difference Result 240 states and 403 transitions. [2019-11-20 00:38:46,803 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-11-20 00:38:46,803 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 214 [2019-11-20 00:38:46,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 00:38:46,805 INFO L225 Difference]: With dead ends: 240 [2019-11-20 00:38:46,805 INFO L226 Difference]: Without dead ends: 131 [2019-11-20 00:38:46,807 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 313 GetRequests, 269 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 585 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=268, Invalid=1712, Unknown=0, NotChecked=0, Total=1980 [2019-11-20 00:38:46,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2019-11-20 00:38:46,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 126. [2019-11-20 00:38:46,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2019-11-20 00:38:46,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 166 transitions. [2019-11-20 00:38:46,824 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 166 transitions. Word has length 214 [2019-11-20 00:38:46,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 00:38:46,825 INFO L462 AbstractCegarLoop]: Abstraction has 126 states and 166 transitions. [2019-11-20 00:38:46,825 INFO L463 AbstractCegarLoop]: Interpolant automaton has 34 states. [2019-11-20 00:38:46,825 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 166 transitions. [2019-11-20 00:38:46,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2019-11-20 00:38:46,829 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 00:38:46,829 INFO L410 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 10, 9, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2019-11-20 00:38:47,032 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 00:38:47,033 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 00:38:47,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 00:38:47,034 INFO L82 PathProgramCache]: Analyzing trace with hash 634625338, now seen corresponding path program 4 times [2019-11-20 00:38:47,034 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 00:38:47,034 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508423498] [2019-11-20 00:38:47,034 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 00:38:47,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:38:47,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:38:47,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:38:47,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:38:47,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:38:47,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:38:47,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:38:47,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:38:47,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:38:47,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:38:47,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:38:47,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:38:47,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:38:47,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:38:47,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:38:47,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:38:47,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:38:47,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:38:47,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:38:47,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:38:47,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:38:47,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:38:47,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:38:47,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:38:47,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:38:47,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:38:47,253 INFO L134 CoverageAnalysis]: Checked inductivity of 777 backedges. 131 proven. 3 refuted. 0 times theorem prover too weak. 643 trivial. 0 not checked. [2019-11-20 00:38:47,254 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508423498] [2019-11-20 00:38:47,254 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1807242964] [2019-11-20 00:38:47,254 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_03e90829-58c8-4747-b969-009b0d4f6fda/bin/uautomizer/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 00:38:47,329 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-20 00:38:47,329 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 00:38:47,330 INFO L255 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-20 00:38:47,334 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 00:38:47,381 INFO L134 CoverageAnalysis]: Checked inductivity of 777 backedges. 171 proven. 0 refuted. 0 times theorem prover too weak. 606 trivial. 0 not checked. [2019-11-20 00:38:47,381 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-20 00:38:47,382 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 7 [2019-11-20 00:38:47,382 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133195374] [2019-11-20 00:38:47,383 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-20 00:38:47,383 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 00:38:47,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-20 00:38:47,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-11-20 00:38:47,383 INFO L87 Difference]: Start difference. First operand 126 states and 166 transitions. Second operand 6 states. [2019-11-20 00:38:47,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 00:38:47,435 INFO L93 Difference]: Finished difference Result 240 states and 329 transitions. [2019-11-20 00:38:47,437 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-20 00:38:47,437 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 172 [2019-11-20 00:38:47,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 00:38:47,439 INFO L225 Difference]: With dead ends: 240 [2019-11-20 00:38:47,439 INFO L226 Difference]: Without dead ends: 116 [2019-11-20 00:38:47,440 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 223 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-11-20 00:38:47,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2019-11-20 00:38:47,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 116. [2019-11-20 00:38:47,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2019-11-20 00:38:47,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 148 transitions. [2019-11-20 00:38:47,450 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 148 transitions. Word has length 172 [2019-11-20 00:38:47,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 00:38:47,450 INFO L462 AbstractCegarLoop]: Abstraction has 116 states and 148 transitions. [2019-11-20 00:38:47,450 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-20 00:38:47,450 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 148 transitions. [2019-11-20 00:38:47,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2019-11-20 00:38:47,452 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 00:38:47,452 INFO L410 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 9, 8, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1] [2019-11-20 00:38:47,655 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 00:38:47,656 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 00:38:47,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 00:38:47,658 INFO L82 PathProgramCache]: Analyzing trace with hash 1745059098, now seen corresponding path program 5 times [2019-11-20 00:38:47,658 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 00:38:47,658 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186946824] [2019-11-20 00:38:47,658 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 00:38:47,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:38:47,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:38:47,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:38:47,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:38:47,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:38:47,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:38:47,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:38:47,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:38:47,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:38:47,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:38:47,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:38:47,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:38:47,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:38:47,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:38:47,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:38:47,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:38:47,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:38:47,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:38:47,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:38:48,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:38:48,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:38:48,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:38:48,069 INFO L134 CoverageAnalysis]: Checked inductivity of 544 backedges. 145 proven. 138 refuted. 0 times theorem prover too weak. 261 trivial. 0 not checked. [2019-11-20 00:38:48,069 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186946824] [2019-11-20 00:38:48,070 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1253177226] [2019-11-20 00:38:48,070 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_03e90829-58c8-4747-b969-009b0d4f6fda/bin/uautomizer/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 00:38:48,128 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2019-11-20 00:38:48,129 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 00:38:48,130 INFO L255 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 16 conjunts are in the unsatisfiable core [2019-11-20 00:38:48,132 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 00:38:48,283 INFO L134 CoverageAnalysis]: Checked inductivity of 544 backedges. 150 proven. 142 refuted. 0 times theorem prover too weak. 252 trivial. 0 not checked. [2019-11-20 00:38:48,283 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 00:38:48,283 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 14] total 25 [2019-11-20 00:38:48,285 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619699575] [2019-11-20 00:38:48,287 INFO L442 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-11-20 00:38:48,287 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 00:38:48,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-11-20 00:38:48,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=508, Unknown=0, NotChecked=0, Total=600 [2019-11-20 00:38:48,289 INFO L87 Difference]: Start difference. First operand 116 states and 148 transitions. Second operand 25 states. [2019-11-20 00:38:48,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 00:38:48,696 INFO L93 Difference]: Finished difference Result 244 states and 330 transitions. [2019-11-20 00:38:48,696 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-11-20 00:38:48,696 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 146 [2019-11-20 00:38:48,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 00:38:48,698 INFO L225 Difference]: With dead ends: 244 [2019-11-20 00:38:48,698 INFO L226 Difference]: Without dead ends: 130 [2019-11-20 00:38:48,699 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=148, Invalid=782, Unknown=0, NotChecked=0, Total=930 [2019-11-20 00:38:48,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2019-11-20 00:38:48,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 126. [2019-11-20 00:38:48,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2019-11-20 00:38:48,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 160 transitions. [2019-11-20 00:38:48,713 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 160 transitions. Word has length 146 [2019-11-20 00:38:48,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 00:38:48,713 INFO L462 AbstractCegarLoop]: Abstraction has 126 states and 160 transitions. [2019-11-20 00:38:48,713 INFO L463 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-11-20 00:38:48,714 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 160 transitions. [2019-11-20 00:38:48,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2019-11-20 00:38:48,716 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 00:38:48,717 INFO L410 BasicCegarLoop]: trace histogram [17, 17, 14, 14, 13, 12, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 6, 4, 4, 2, 1, 1, 1, 1, 1, 1] [2019-11-20 00:38:48,919 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 00:38:48,920 INFO L410 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 00:38:48,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 00:38:48,920 INFO L82 PathProgramCache]: Analyzing trace with hash 245292255, now seen corresponding path program 6 times [2019-11-20 00:38:48,920 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 00:38:48,920 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058710011] [2019-11-20 00:38:48,921 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 00:38:48,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:38:48,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:38:49,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:38:49,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:38:49,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:38:49,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:38:49,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:38:49,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:38:49,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:38:49,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:38:49,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:38:49,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:38:49,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:38:49,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:38:49,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:38:49,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:38:49,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:38:49,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:38:49,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:38:49,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:38:49,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:38:49,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:38:49,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:38:49,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:38:49,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:38:49,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:38:49,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:38:49,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:38:49,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:38:49,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:38:49,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:38:49,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:38:49,540 INFO L134 CoverageAnalysis]: Checked inductivity of 1248 backedges. 210 proven. 368 refuted. 0 times theorem prover too weak. 670 trivial. 0 not checked. [2019-11-20 00:38:49,540 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058710011] [2019-11-20 00:38:49,541 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [822368780] [2019-11-20 00:38:49,541 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_03e90829-58c8-4747-b969-009b0d4f6fda/bin/uautomizer/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 00:38:49,620 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2019-11-20 00:38:49,620 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 00:38:49,621 INFO L255 TraceCheckSpWp]: Trace formula consists of 402 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-20 00:38:49,625 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 00:38:49,763 INFO L134 CoverageAnalysis]: Checked inductivity of 1248 backedges. 294 proven. 58 refuted. 0 times theorem prover too weak. 896 trivial. 0 not checked. [2019-11-20 00:38:49,764 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 00:38:49,764 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 10] total 30 [2019-11-20 00:38:49,764 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545958287] [2019-11-20 00:38:49,765 INFO L442 AbstractCegarLoop]: Interpolant automaton has 30 states [2019-11-20 00:38:49,765 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 00:38:49,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2019-11-20 00:38:49,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=750, Unknown=0, NotChecked=0, Total=870 [2019-11-20 00:38:49,767 INFO L87 Difference]: Start difference. First operand 126 states and 160 transitions. Second operand 30 states. [2019-11-20 00:38:50,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 00:38:50,771 INFO L93 Difference]: Finished difference Result 281 states and 406 transitions. [2019-11-20 00:38:50,772 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2019-11-20 00:38:50,772 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 214 [2019-11-20 00:38:50,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 00:38:50,774 INFO L225 Difference]: With dead ends: 281 [2019-11-20 00:38:50,774 INFO L226 Difference]: Without dead ends: 160 [2019-11-20 00:38:50,776 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 318 GetRequests, 269 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 726 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=358, Invalid=2192, Unknown=0, NotChecked=0, Total=2550 [2019-11-20 00:38:50,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2019-11-20 00:38:50,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 143. [2019-11-20 00:38:50,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2019-11-20 00:38:50,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 184 transitions. [2019-11-20 00:38:50,786 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 184 transitions. Word has length 214 [2019-11-20 00:38:50,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 00:38:50,787 INFO L462 AbstractCegarLoop]: Abstraction has 143 states and 184 transitions. [2019-11-20 00:38:50,787 INFO L463 AbstractCegarLoop]: Interpolant automaton has 30 states. [2019-11-20 00:38:50,787 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 184 transitions. [2019-11-20 00:38:50,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2019-11-20 00:38:50,789 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 00:38:50,789 INFO L410 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 10, 10, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1] [2019-11-20 00:38:50,992 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 00:38:50,993 INFO L410 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 00:38:50,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 00:38:50,993 INFO L82 PathProgramCache]: Analyzing trace with hash 1112792143, now seen corresponding path program 7 times [2019-11-20 00:38:50,993 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 00:38:50,993 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259662590] [2019-11-20 00:38:51,009 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 00:38:51,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:38:51,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:38:51,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:38:51,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:38:51,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:38:51,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:38:51,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:38:51,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:38:51,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:38:51,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:38:51,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:38:51,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:38:51,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:38:51,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:38:51,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:38:51,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:38:51,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:38:51,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:38:51,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:38:51,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:38:51,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:38:51,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:38:51,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:38:51,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:38:51,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:38:51,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:38:52,042 INFO L134 CoverageAnalysis]: Checked inductivity of 786 backedges. 0 proven. 267 refuted. 0 times theorem prover too weak. 519 trivial. 0 not checked. [2019-11-20 00:38:52,043 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259662590] [2019-11-20 00:38:52,043 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [469859693] [2019-11-20 00:38:52,043 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_03e90829-58c8-4747-b969-009b0d4f6fda/bin/uautomizer/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 00:38:52,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:38:52,124 INFO L255 TraceCheckSpWp]: Trace formula consists of 386 conjuncts, 103 conjunts are in the unsatisfiable core [2019-11-20 00:38:52,129 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 00:38:52,935 INFO L134 CoverageAnalysis]: Checked inductivity of 786 backedges. 0 proven. 267 refuted. 0 times theorem prover too weak. 519 trivial. 0 not checked. [2019-11-20 00:38:52,935 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 00:38:52,935 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 36 [2019-11-20 00:38:52,936 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316891537] [2019-11-20 00:38:52,936 INFO L442 AbstractCegarLoop]: Interpolant automaton has 36 states [2019-11-20 00:38:52,936 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 00:38:52,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2019-11-20 00:38:52,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=1175, Unknown=0, NotChecked=0, Total=1260 [2019-11-20 00:38:52,937 INFO L87 Difference]: Start difference. First operand 143 states and 184 transitions. Second operand 36 states. [2019-11-20 00:38:53,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 00:38:53,357 INFO L93 Difference]: Finished difference Result 150 states and 193 transitions. [2019-11-20 00:38:53,358 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-11-20 00:38:53,358 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 173 [2019-11-20 00:38:53,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 00:38:53,359 INFO L225 Difference]: With dead ends: 150 [2019-11-20 00:38:53,360 INFO L226 Difference]: Without dead ends: 146 [2019-11-20 00:38:53,360 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 227 SyntacticMatches, 14 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=85, Invalid=1175, Unknown=0, NotChecked=0, Total=1260 [2019-11-20 00:38:53,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2019-11-20 00:38:53,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 143. [2019-11-20 00:38:53,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2019-11-20 00:38:53,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 182 transitions. [2019-11-20 00:38:53,369 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 182 transitions. Word has length 173 [2019-11-20 00:38:53,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 00:38:53,369 INFO L462 AbstractCegarLoop]: Abstraction has 143 states and 182 transitions. [2019-11-20 00:38:53,369 INFO L463 AbstractCegarLoop]: Interpolant automaton has 36 states. [2019-11-20 00:38:53,369 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 182 transitions. [2019-11-20 00:38:53,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2019-11-20 00:38:53,375 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 00:38:53,375 INFO L410 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 13, 12, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 6, 4, 3, 3, 1, 1, 1, 1, 1, 1] [2019-11-20 00:38:53,579 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 00:38:53,579 INFO L410 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 00:38:53,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 00:38:53,579 INFO L82 PathProgramCache]: Analyzing trace with hash -1640173863, now seen corresponding path program 8 times [2019-11-20 00:38:53,580 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 00:38:53,580 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676011215] [2019-11-20 00:38:53,581 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 00:38:53,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:38:53,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:38:53,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:38:53,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:38:53,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:38:53,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:38:53,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:38:53,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:38:53,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:38:53,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:38:53,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:38:53,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:38:53,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:38:53,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:38:53,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:38:53,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:38:53,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:38:53,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:38:53,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:38:53,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:38:53,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:38:53,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:38:53,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:38:54,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:38:54,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:38:54,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:38:54,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:38:54,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:38:54,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:38:54,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:38:54,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:38:54,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:38:54,081 INFO L134 CoverageAnalysis]: Checked inductivity of 1240 backedges. 201 proven. 323 refuted. 0 times theorem prover too weak. 716 trivial. 0 not checked. [2019-11-20 00:38:54,081 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676011215] [2019-11-20 00:38:54,081 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [139738882] [2019-11-20 00:38:54,082 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_03e90829-58c8-4747-b969-009b0d4f6fda/bin/uautomizer/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 00:38:54,174 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-20 00:38:54,174 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 00:38:54,175 INFO L255 TraceCheckSpWp]: Trace formula consists of 477 conjuncts, 15 conjunts are in the unsatisfiable core [2019-11-20 00:38:54,179 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 00:38:54,347 INFO L134 CoverageAnalysis]: Checked inductivity of 1240 backedges. 111 proven. 313 refuted. 0 times theorem prover too weak. 816 trivial. 0 not checked. [2019-11-20 00:38:54,347 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 00:38:54,348 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 12] total 25 [2019-11-20 00:38:54,348 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905725036] [2019-11-20 00:38:54,349 INFO L442 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-11-20 00:38:54,349 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 00:38:54,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-11-20 00:38:54,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=514, Unknown=0, NotChecked=0, Total=600 [2019-11-20 00:38:54,350 INFO L87 Difference]: Start difference. First operand 143 states and 182 transitions. Second operand 25 states. [2019-11-20 00:38:54,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 00:38:54,724 INFO L93 Difference]: Finished difference Result 263 states and 336 transitions. [2019-11-20 00:38:54,725 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-11-20 00:38:54,725 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 214 [2019-11-20 00:38:54,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 00:38:54,725 INFO L225 Difference]: With dead ends: 263 [2019-11-20 00:38:54,725 INFO L226 Difference]: Without dead ends: 0 [2019-11-20 00:38:54,726 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 299 GetRequests, 270 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=132, Invalid=738, Unknown=0, NotChecked=0, Total=870 [2019-11-20 00:38:54,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-11-20 00:38:54,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-11-20 00:38:54,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-11-20 00:38:54,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-11-20 00:38:54,727 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 214 [2019-11-20 00:38:54,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 00:38:54,727 INFO L462 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-11-20 00:38:54,727 INFO L463 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-11-20 00:38:54,727 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-11-20 00:38:54,727 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-11-20 00:38:54,928 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 00:38:54,931 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2019-11-20 00:38:55,548 WARN L191 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 7 [2019-11-20 00:38:55,991 WARN L191 SmtUtils]: Spent 325.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 30 [2019-11-20 00:38:56,350 WARN L191 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 27 [2019-11-20 00:38:56,352 INFO L444 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2019-11-20 00:38:56,352 INFO L444 ceAbstractionStarter]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2019-11-20 00:38:56,352 INFO L444 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2019-11-20 00:38:56,352 INFO L444 ceAbstractionStarter]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 39) no Hoare annotation was computed. [2019-11-20 00:38:56,353 INFO L440 ceAbstractionStarter]: At program point L41(lines 35 42) the Hoare annotation is: (<= 6 ULTIMATE.start_main_~x~0) [2019-11-20 00:38:56,353 INFO L444 ceAbstractionStarter]: For program point L39(line 39) no Hoare annotation was computed. [2019-11-20 00:38:56,353 INFO L444 ceAbstractionStarter]: For program point L38(lines 38 40) no Hoare annotation was computed. [2019-11-20 00:38:56,353 INFO L440 ceAbstractionStarter]: At program point L37(line 37) the Hoare annotation is: (and (<= 6 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~x~0 6)) [2019-11-20 00:38:56,353 INFO L444 ceAbstractionStarter]: For program point L37-1(line 37) no Hoare annotation was computed. [2019-11-20 00:38:56,353 INFO L444 ceAbstractionStarter]: For program point L38-2(lines 38 40) no Hoare annotation was computed. [2019-11-20 00:38:56,353 INFO L447 ceAbstractionStarter]: At program point fibo2ENTRY(lines 17 25) the Hoare annotation is: true [2019-11-20 00:38:56,353 INFO L440 ceAbstractionStarter]: At program point L23(line 23) the Hoare annotation is: (and (not (<= |fibo2_#in~n| 1)) (= fibo2_~n |fibo2_#in~n|)) [2019-11-20 00:38:56,353 INFO L444 ceAbstractionStarter]: For program point L23-1(line 23) no Hoare annotation was computed. [2019-11-20 00:38:56,353 INFO L440 ceAbstractionStarter]: At program point L23-2(line 23) the Hoare annotation is: (let ((.cse0 (<= |fibo2_#in~n| 4))) (and (or (not (<= 3 |fibo2_#in~n|)) (and (<= |fibo2_#t~ret2| 2) (<= 2 |fibo2_#t~ret2|)) (not .cse0)) (or (and (<= 1 |fibo2_#t~ret2|) (<= |fibo2_#t~ret2| 1) (<= 2 |fibo2_#in~n|)) (not (<= |fibo2_#in~n| 3))) (= fibo2_~n |fibo2_#in~n|) (or .cse0 (and (<= 3 |fibo2_#t~ret2|) (<= |fibo2_#t~ret2| 3)) (<= 6 |fibo2_#in~n|)))) [2019-11-20 00:38:56,353 INFO L444 ceAbstractionStarter]: For program point L20(lines 20 24) no Hoare annotation was computed. [2019-11-20 00:38:56,353 INFO L444 ceAbstractionStarter]: For program point L23-3(line 23) no Hoare annotation was computed. [2019-11-20 00:38:56,353 INFO L444 ceAbstractionStarter]: For program point L18(lines 18 24) no Hoare annotation was computed. [2019-11-20 00:38:56,354 INFO L444 ceAbstractionStarter]: For program point fibo2FINAL(lines 17 25) no Hoare annotation was computed. [2019-11-20 00:38:56,354 INFO L444 ceAbstractionStarter]: For program point fibo2EXIT(lines 17 25) no Hoare annotation was computed. [2019-11-20 00:38:56,354 INFO L447 ceAbstractionStarter]: At program point fibo1ENTRY(lines 7 15) the Hoare annotation is: true [2019-11-20 00:38:56,354 INFO L440 ceAbstractionStarter]: At program point L13(line 13) the Hoare annotation is: (and (< 1 fibo1_~n) (= fibo1_~n |fibo1_#in~n|)) [2019-11-20 00:38:56,354 INFO L444 ceAbstractionStarter]: For program point L13-1(line 13) no Hoare annotation was computed. [2019-11-20 00:38:56,354 INFO L440 ceAbstractionStarter]: At program point L13-2(line 13) the Hoare annotation is: (and (let ((.cse0 (= fibo1_~n |fibo1_#in~n|))) (or (and (<= 7 |fibo1_#in~n|) .cse0) (and (<= |fibo1_#t~ret0| 5) (<= 5 |fibo1_#t~ret0|) .cse0) (and (<= |fibo1_#in~n| 5) .cse0))) (not (<= |fibo1_#in~n| 1)) (or (not (<= |fibo1_#in~n| 4)) (and (<= 1 |fibo1_#t~ret0|) (<= |fibo1_#in~n| 3) (<= |fibo1_#t~ret0| 1)))) [2019-11-20 00:38:56,354 INFO L444 ceAbstractionStarter]: For program point fibo1FINAL(lines 7 15) no Hoare annotation was computed. [2019-11-20 00:38:56,354 INFO L444 ceAbstractionStarter]: For program point L10(lines 10 14) no Hoare annotation was computed. [2019-11-20 00:38:56,354 INFO L444 ceAbstractionStarter]: For program point L13-3(line 13) no Hoare annotation was computed. [2019-11-20 00:38:56,354 INFO L444 ceAbstractionStarter]: For program point L8(lines 8 14) no Hoare annotation was computed. [2019-11-20 00:38:56,354 INFO L444 ceAbstractionStarter]: For program point fibo1EXIT(lines 7 15) no Hoare annotation was computed. [2019-11-20 00:38:56,365 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.11 12:38:56 BoogieIcfgContainer [2019-11-20 00:38:56,365 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-20 00:38:56,365 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-20 00:38:56,365 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-20 00:38:56,366 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-20 00:38:56,366 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 12:38:35" (3/4) ... [2019-11-20 00:38:56,369 INFO L137 WitnessPrinter]: Generating witness for correct program [2019-11-20 00:38:56,375 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure fibo2 [2019-11-20 00:38:56,375 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure fibo1 [2019-11-20 00:38:56,382 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2019-11-20 00:38:56,383 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2019-11-20 00:38:56,417 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_03e90829-58c8-4747-b969-009b0d4f6fda/bin/uautomizer/witness.graphml [2019-11-20 00:38:56,417 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-20 00:38:56,418 INFO L168 Benchmark]: Toolchain (without parser) took 21644.26 ms. Allocated memory was 1.0 GB in the beginning and 1.5 GB in the end (delta: 479.2 MB). Free memory was 948.7 MB in the beginning and 1.0 GB in the end (delta: -74.9 MB). Peak memory consumption was 404.3 MB. Max. memory is 11.5 GB. [2019-11-20 00:38:56,418 INFO L168 Benchmark]: CDTParser took 0.22 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. [2019-11-20 00:38:56,419 INFO L168 Benchmark]: CACSL2BoogieTranslator took 361.33 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 171.4 MB). Free memory was 948.7 MB in the beginning and 1.2 GB in the end (delta: -216.8 MB). Peak memory consumption was 23.1 MB. Max. memory is 11.5 GB. [2019-11-20 00:38:56,419 INFO L168 Benchmark]: Boogie Procedure Inliner took 28.09 ms. Allocated memory is still 1.2 GB. Free memory is still 1.2 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-20 00:38:56,420 INFO L168 Benchmark]: Boogie Preprocessor took 15.90 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 3.5 MB). Peak memory consumption was 3.5 MB. Max. memory is 11.5 GB. [2019-11-20 00:38:56,420 INFO L168 Benchmark]: RCFGBuilder took 221.39 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.1 GB in the end (delta: 24.2 MB). Peak memory consumption was 24.2 MB. Max. memory is 11.5 GB. [2019-11-20 00:38:56,420 INFO L168 Benchmark]: TraceAbstraction took 20960.97 ms. Allocated memory was 1.2 GB in the beginning and 1.5 GB in the end (delta: 307.8 MB). Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 109.8 MB). Peak memory consumption was 417.6 MB. Max. memory is 11.5 GB. [2019-11-20 00:38:56,421 INFO L168 Benchmark]: Witness Printer took 51.77 ms. Allocated memory is still 1.5 GB. Free memory was 1.0 GB in the beginning and 1.0 GB in the end (delta: 4.3 MB). Peak memory consumption was 4.3 MB. Max. memory is 11.5 GB. [2019-11-20 00:38:56,423 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 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 361.33 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 171.4 MB). Free memory was 948.7 MB in the beginning and 1.2 GB in the end (delta: -216.8 MB). Peak memory consumption was 23.1 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 28.09 ms. Allocated memory is still 1.2 GB. Free memory is still 1.2 GB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 15.90 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 3.5 MB). Peak memory consumption was 3.5 MB. Max. memory is 11.5 GB. * RCFGBuilder took 221.39 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.1 GB in the end (delta: 24.2 MB). Peak memory consumption was 24.2 MB. Max. memory is 11.5 GB. * TraceAbstraction took 20960.97 ms. Allocated memory was 1.2 GB in the beginning and 1.5 GB in the end (delta: 307.8 MB). Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 109.8 MB). Peak memory consumption was 417.6 MB. Max. memory is 11.5 GB. * Witness Printer took 51.77 ms. Allocated memory is still 1.5 GB. Free memory was 1.0 GB in the beginning and 1.0 GB in the end (delta: 4.3 MB). Peak memory consumption was 4.3 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 39]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 35]: Loop Invariant Derived loop invariant: 6 <= x - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 28 locations, 1 error locations. Result: SAFE, OverallTime: 20.8s, OverallIterations: 16, TraceHistogramMax: 21, AutomataDifference: 6.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 1.4s, HoareTripleCheckerStatistics: 485 SDtfs, 848 SDslu, 4710 SDs, 0 SdLazy, 6551 SolverSat, 877 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 4.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2648 GetRequests, 2269 SyntacticMatches, 19 SemanticMatches, 360 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2714 ImplicationChecksByTransitivity, 5.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=143occurred in iteration=14, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 16 MinimizatonAttempts, 155 StatesRemovedByMinimization, 13 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 701 PreInvPairs, 1173 NumberOfFragments, 121 HoareAnnotationTreeSize, 701 FomulaSimplifications, 8925 FormulaSimplificationTreeSizeReduction, 0.4s HoareSimplificationTime, 8 FomulaSimplificationsInter, 7450 FormulaSimplificationTreeSizeReductionInter, 0.9s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 7.7s InterpolantComputationTime, 3573 NumberOfCodeBlocks, 3402 NumberOfCodeBlocksAsserted, 56 NumberOfCheckSat, 3543 ConstructedInterpolants, 0 QuantifiedInterpolants, 1219797 SizeOfPredicates, 66 NumberOfNonLiveVariables, 3572 ConjunctsInSsa, 237 ConjunctsInUnsatCore, 30 InterpolantComputations, 3 PerfectInterpolantSequences, 13345/16956 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...