./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursive-simple/id_i10_o10-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 30f4e4ab Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx12G -Xms1G -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/recursive-simple/id_i10_o10-2.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --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 d354f5dc1a4e4616bf2c7c7fc4888805a134a8dd ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.24-30f4e4a [2019-11-28 00:25:44,069 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-28 00:25:44,072 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-28 00:25:44,086 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-28 00:25:44,087 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-28 00:25:44,088 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-28 00:25:44,090 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-28 00:25:44,092 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-28 00:25:44,094 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-28 00:25:44,096 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-28 00:25:44,097 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-28 00:25:44,098 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-28 00:25:44,099 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-28 00:25:44,100 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-28 00:25:44,101 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-28 00:25:44,103 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-28 00:25:44,104 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-28 00:25:44,105 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-28 00:25:44,107 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-28 00:25:44,110 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-28 00:25:44,111 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-28 00:25:44,113 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-28 00:25:44,114 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-28 00:25:44,115 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-28 00:25:44,117 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-28 00:25:44,118 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-28 00:25:44,118 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-28 00:25:44,119 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-28 00:25:44,120 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-28 00:25:44,121 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-28 00:25:44,121 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-28 00:25:44,122 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-28 00:25:44,124 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-28 00:25:44,125 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-28 00:25:44,126 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-28 00:25:44,126 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-28 00:25:44,127 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-28 00:25:44,128 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-28 00:25:44,128 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-28 00:25:44,129 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-28 00:25:44,130 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-28 00:25:44,131 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-28 00:25:44,147 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-28 00:25:44,148 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-28 00:25:44,149 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-28 00:25:44,150 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-28 00:25:44,150 INFO L138 SettingsManager]: * Use SBE=true [2019-11-28 00:25:44,150 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-28 00:25:44,151 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-28 00:25:44,151 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-28 00:25:44,151 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-28 00:25:44,152 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-28 00:25:44,152 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-28 00:25:44,152 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-28 00:25:44,152 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-28 00:25:44,153 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-28 00:25:44,153 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-28 00:25:44,153 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-28 00:25:44,154 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-28 00:25:44,154 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-28 00:25:44,154 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-28 00:25:44,155 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-28 00:25:44,155 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-28 00:25:44,155 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-28 00:25:44,156 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-28 00:25:44,156 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-28 00:25:44,156 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-28 00:25:44,157 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-28 00:25:44,157 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-28 00:25:44,157 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-28 00:25:44,157 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 -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux 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 -> d354f5dc1a4e4616bf2c7c7fc4888805a134a8dd [2019-11-28 00:25:44,507 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-28 00:25:44,520 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-28 00:25:44,523 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-28 00:25:44,525 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-28 00:25:44,525 INFO L275 PluginConnector]: CDTParser initialized [2019-11-28 00:25:44,526 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive-simple/id_i10_o10-2.c [2019-11-28 00:25:44,590 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a717df144/348d368d8c884336b1acffaedaf90d11/FLAGfd9bd55f5 [2019-11-28 00:25:45,034 INFO L306 CDTParser]: Found 1 translation units. [2019-11-28 00:25:45,035 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive-simple/id_i10_o10-2.c [2019-11-28 00:25:45,042 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a717df144/348d368d8c884336b1acffaedaf90d11/FLAGfd9bd55f5 [2019-11-28 00:25:45,400 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a717df144/348d368d8c884336b1acffaedaf90d11 [2019-11-28 00:25:45,405 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-28 00:25:45,407 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-28 00:25:45,408 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-28 00:25:45,408 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-28 00:25:45,413 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-28 00:25:45,414 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 12:25:45" (1/1) ... [2019-11-28 00:25:45,417 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2727f677 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:25:45, skipping insertion in model container [2019-11-28 00:25:45,418 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 12:25:45" (1/1) ... [2019-11-28 00:25:45,427 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-28 00:25:45,446 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-28 00:25:45,700 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-28 00:25:45,705 INFO L203 MainTranslator]: Completed pre-run [2019-11-28 00:25:45,725 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-28 00:25:45,744 INFO L208 MainTranslator]: Completed translation [2019-11-28 00:25:45,745 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:25:45 WrapperNode [2019-11-28 00:25:45,746 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-28 00:25:45,747 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-28 00:25:45,747 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-28 00:25:45,748 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-28 00:25:45,759 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:25:45" (1/1) ... [2019-11-28 00:25:45,765 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:25:45" (1/1) ... [2019-11-28 00:25:45,787 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-28 00:25:45,789 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-28 00:25:45,790 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-28 00:25:45,790 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-28 00:25:45,858 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:25:45" (1/1) ... [2019-11-28 00:25:45,858 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:25:45" (1/1) ... [2019-11-28 00:25:45,866 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:25:45" (1/1) ... [2019-11-28 00:25:45,866 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:25:45" (1/1) ... [2019-11-28 00:25:45,869 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:25:45" (1/1) ... [2019-11-28 00:25:45,871 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:25:45" (1/1) ... [2019-11-28 00:25:45,872 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:25:45" (1/1) ... [2019-11-28 00:25:45,874 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-28 00:25:45,875 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-28 00:25:45,876 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-28 00:25:45,876 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-28 00:25:45,877 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:25:45" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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 [2019-11-28 00:25:45,950 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-28 00:25:45,950 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-28 00:25:45,951 INFO L130 BoogieDeclarations]: Found specification of procedure id [2019-11-28 00:25:45,951 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2019-11-28 00:25:46,156 INFO L292 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-28 00:25:46,157 INFO L297 CfgBuilder]: Removed 4 assume(true) statements. [2019-11-28 00:25:46,158 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 12:25:46 BoogieIcfgContainer [2019-11-28 00:25:46,158 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-28 00:25:46,159 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-28 00:25:46,160 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-28 00:25:46,163 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-28 00:25:46,163 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 12:25:45" (1/3) ... [2019-11-28 00:25:46,164 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23691cbb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 12:25:46, skipping insertion in model container [2019-11-28 00:25:46,164 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:25:45" (2/3) ... [2019-11-28 00:25:46,165 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23691cbb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 12:25:46, skipping insertion in model container [2019-11-28 00:25:46,165 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 12:25:46" (3/3) ... [2019-11-28 00:25:46,166 INFO L109 eAbstractionObserver]: Analyzing ICFG id_i10_o10-2.c [2019-11-28 00:25:46,176 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-28 00:25:46,182 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-28 00:25:46,194 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-28 00:25:46,218 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-28 00:25:46,218 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-28 00:25:46,218 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-28 00:25:46,218 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-28 00:25:46,218 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-28 00:25:46,218 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-28 00:25:46,219 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-28 00:25:46,219 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-28 00:25:46,235 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states. [2019-11-28 00:25:46,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-11-28 00:25:46,240 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 00:25:46,241 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 00:25:46,242 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 00:25:46,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 00:25:46,247 INFO L82 PathProgramCache]: Analyzing trace with hash 389977641, now seen corresponding path program 1 times [2019-11-28 00:25:46,257 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 00:25:46,257 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420466833] [2019-11-28 00:25:46,257 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 00:25:46,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:46,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:46,478 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 00:25:46,479 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420466833] [2019-11-28 00:25:46,480 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-28 00:25:46,481 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-28 00:25:46,483 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707314910] [2019-11-28 00:25:46,490 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-28 00:25:46,491 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 00:25:46,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-28 00:25:46,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-28 00:25:46,520 INFO L87 Difference]: Start difference. First operand 15 states. Second operand 5 states. [2019-11-28 00:25:46,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 00:25:46,627 INFO L93 Difference]: Finished difference Result 24 states and 27 transitions. [2019-11-28 00:25:46,628 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-28 00:25:46,629 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2019-11-28 00:25:46,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 00:25:46,639 INFO L225 Difference]: With dead ends: 24 [2019-11-28 00:25:46,639 INFO L226 Difference]: Without dead ends: 14 [2019-11-28 00:25:46,642 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 [2019-11-28 00:25:46,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2019-11-28 00:25:46,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2019-11-28 00:25:46,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2019-11-28 00:25:46,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2019-11-28 00:25:46,679 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 9 [2019-11-28 00:25:46,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 00:25:46,679 INFO L462 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2019-11-28 00:25:46,679 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-28 00:25:46,679 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2019-11-28 00:25:46,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-28 00:25:46,681 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 00:25:46,681 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 00:25:46,681 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 00:25:46,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 00:25:46,681 INFO L82 PathProgramCache]: Analyzing trace with hash -881029229, now seen corresponding path program 1 times [2019-11-28 00:25:46,682 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 00:25:46,682 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933427826] [2019-11-28 00:25:46,682 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 00:25:46,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:46,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:46,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:46,791 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-28 00:25:46,791 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933427826] [2019-11-28 00:25:46,791 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1387023018] [2019-11-28 00:25:46,792 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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 [2019-11-28 00:25:46,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:46,844 INFO L255 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-28 00:25:46,853 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 00:25:46,923 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-28 00:25:46,923 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 00:25:46,923 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2019-11-28 00:25:46,924 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636896911] [2019-11-28 00:25:46,926 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-28 00:25:46,926 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 00:25:46,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-28 00:25:46,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-11-28 00:25:46,928 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 8 states. [2019-11-28 00:25:47,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 00:25:47,030 INFO L93 Difference]: Finished difference Result 21 states and 22 transitions. [2019-11-28 00:25:47,032 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-28 00:25:47,032 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 15 [2019-11-28 00:25:47,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 00:25:47,033 INFO L225 Difference]: With dead ends: 21 [2019-11-28 00:25:47,033 INFO L226 Difference]: Without dead ends: 17 [2019-11-28 00:25:47,035 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2019-11-28 00:25:47,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2019-11-28 00:25:47,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2019-11-28 00:25:47,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-11-28 00:25:47,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2019-11-28 00:25:47,047 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 15 [2019-11-28 00:25:47,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 00:25:47,048 INFO L462 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2019-11-28 00:25:47,048 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-28 00:25:47,048 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2019-11-28 00:25:47,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-11-28 00:25:47,052 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 00:25:47,053 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 00:25:47,258 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 00:25:47,258 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 00:25:47,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 00:25:47,259 INFO L82 PathProgramCache]: Analyzing trace with hash -1824240471, now seen corresponding path program 2 times [2019-11-28 00:25:47,260 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 00:25:47,261 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961000225] [2019-11-28 00:25:47,261 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 00:25:47,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:47,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:47,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:47,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:47,564 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-11-28 00:25:47,564 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961000225] [2019-11-28 00:25:47,565 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2086775557] [2019-11-28 00:25:47,565 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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 [2019-11-28 00:25:47,606 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-28 00:25:47,607 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-28 00:25:47,608 INFO L255 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-28 00:25:47,610 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 00:25:47,657 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-11-28 00:25:47,658 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 00:25:47,659 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2019-11-28 00:25:47,659 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336856483] [2019-11-28 00:25:47,660 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-28 00:25:47,660 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 00:25:47,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-28 00:25:47,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-11-28 00:25:47,661 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 9 states. [2019-11-28 00:25:47,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 00:25:47,769 INFO L93 Difference]: Finished difference Result 24 states and 25 transitions. [2019-11-28 00:25:47,771 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-28 00:25:47,772 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 21 [2019-11-28 00:25:47,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 00:25:47,773 INFO L225 Difference]: With dead ends: 24 [2019-11-28 00:25:47,773 INFO L226 Difference]: Without dead ends: 20 [2019-11-28 00:25:47,775 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2019-11-28 00:25:47,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-11-28 00:25:47,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2019-11-28 00:25:47,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-11-28 00:25:47,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2019-11-28 00:25:47,784 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 21 [2019-11-28 00:25:47,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 00:25:47,784 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2019-11-28 00:25:47,784 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-28 00:25:47,785 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2019-11-28 00:25:47,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-11-28 00:25:47,786 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 00:25:47,786 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 00:25:47,989 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 00:25:47,990 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 00:25:47,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 00:25:47,991 INFO L82 PathProgramCache]: Analyzing trace with hash -28473709, now seen corresponding path program 3 times [2019-11-28 00:25:47,991 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 00:25:47,992 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868857149] [2019-11-28 00:25:47,992 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 00:25:48,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:48,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:48,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:48,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:48,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:48,251 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-28 00:25:48,251 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868857149] [2019-11-28 00:25:48,252 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1853351161] [2019-11-28 00:25:48,252 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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 [2019-11-28 00:25:48,302 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-11-28 00:25:48,302 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-28 00:25:48,304 INFO L255 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-28 00:25:48,306 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 00:25:48,346 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-28 00:25:48,347 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 00:25:48,347 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2019-11-28 00:25:48,347 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963143673] [2019-11-28 00:25:48,348 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-28 00:25:48,348 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 00:25:48,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-28 00:25:48,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2019-11-28 00:25:48,349 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 10 states. [2019-11-28 00:25:48,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 00:25:48,443 INFO L93 Difference]: Finished difference Result 27 states and 28 transitions. [2019-11-28 00:25:48,443 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-28 00:25:48,444 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 27 [2019-11-28 00:25:48,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 00:25:48,445 INFO L225 Difference]: With dead ends: 27 [2019-11-28 00:25:48,445 INFO L226 Difference]: Without dead ends: 23 [2019-11-28 00:25:48,446 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2019-11-28 00:25:48,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2019-11-28 00:25:48,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2019-11-28 00:25:48,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-11-28 00:25:48,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2019-11-28 00:25:48,452 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 27 [2019-11-28 00:25:48,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 00:25:48,453 INFO L462 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2019-11-28 00:25:48,453 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-28 00:25:48,453 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2019-11-28 00:25:48,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2019-11-28 00:25:48,454 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 00:25:48,455 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 00:25:48,666 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 00:25:48,667 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 00:25:48,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 00:25:48,668 INFO L82 PathProgramCache]: Analyzing trace with hash -2080894167, now seen corresponding path program 4 times [2019-11-28 00:25:48,668 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 00:25:48,669 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274716077] [2019-11-28 00:25:48,670 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 00:25:48,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:48,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:48,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:48,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:48,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:48,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:48,899 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2019-11-28 00:25:48,900 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274716077] [2019-11-28 00:25:48,900 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [247183174] [2019-11-28 00:25:48,901 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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 [2019-11-28 00:25:48,936 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-28 00:25:48,937 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-28 00:25:48,938 INFO L255 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-28 00:25:48,944 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 00:25:48,979 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2019-11-28 00:25:48,980 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 00:25:48,980 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2019-11-28 00:25:48,981 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282988213] [2019-11-28 00:25:48,981 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-28 00:25:48,982 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 00:25:48,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-28 00:25:48,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2019-11-28 00:25:48,982 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand 11 states. [2019-11-28 00:25:49,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 00:25:49,089 INFO L93 Difference]: Finished difference Result 30 states and 31 transitions. [2019-11-28 00:25:49,090 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-28 00:25:49,090 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 33 [2019-11-28 00:25:49,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 00:25:49,091 INFO L225 Difference]: With dead ends: 30 [2019-11-28 00:25:49,091 INFO L226 Difference]: Without dead ends: 26 [2019-11-28 00:25:49,092 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2019-11-28 00:25:49,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-11-28 00:25:49,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2019-11-28 00:25:49,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-11-28 00:25:49,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2019-11-28 00:25:49,099 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 33 [2019-11-28 00:25:49,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 00:25:49,099 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2019-11-28 00:25:49,100 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-28 00:25:49,100 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2019-11-28 00:25:49,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-11-28 00:25:49,101 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 00:25:49,101 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 00:25:49,305 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 00:25:49,305 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 00:25:49,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 00:25:49,306 INFO L82 PathProgramCache]: Analyzing trace with hash -687460973, now seen corresponding path program 5 times [2019-11-28 00:25:49,306 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 00:25:49,307 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758316654] [2019-11-28 00:25:49,307 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 00:25:49,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:49,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:49,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:49,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:49,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:49,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:49,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:49,492 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2019-11-28 00:25:49,493 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758316654] [2019-11-28 00:25:49,493 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1665083971] [2019-11-28 00:25:49,494 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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 [2019-11-28 00:25:49,558 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2019-11-28 00:25:49,559 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-28 00:25:49,560 INFO L255 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 14 conjunts are in the unsatisfiable core [2019-11-28 00:25:49,563 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 00:25:49,624 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2019-11-28 00:25:49,625 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 00:25:49,625 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2019-11-28 00:25:49,625 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520351807] [2019-11-28 00:25:49,626 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-28 00:25:49,626 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 00:25:49,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-28 00:25:49,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2019-11-28 00:25:49,627 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand 12 states. [2019-11-28 00:25:49,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 00:25:49,725 INFO L93 Difference]: Finished difference Result 33 states and 34 transitions. [2019-11-28 00:25:49,725 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-28 00:25:49,725 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 39 [2019-11-28 00:25:49,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 00:25:49,728 INFO L225 Difference]: With dead ends: 33 [2019-11-28 00:25:49,728 INFO L226 Difference]: Without dead ends: 29 [2019-11-28 00:25:49,729 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=104, Invalid=202, Unknown=0, NotChecked=0, Total=306 [2019-11-28 00:25:49,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-11-28 00:25:49,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2019-11-28 00:25:49,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-11-28 00:25:49,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2019-11-28 00:25:49,735 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 39 [2019-11-28 00:25:49,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 00:25:49,736 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2019-11-28 00:25:49,736 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-28 00:25:49,736 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2019-11-28 00:25:49,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2019-11-28 00:25:49,738 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 00:25:49,738 INFO L410 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 00:25:49,938 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 00:25:49,939 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 00:25:49,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 00:25:49,940 INFO L82 PathProgramCache]: Analyzing trace with hash 547744169, now seen corresponding path program 6 times [2019-11-28 00:25:49,941 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 00:25:49,941 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013568184] [2019-11-28 00:25:49,942 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 00:25:49,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:49,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:50,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:50,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:50,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:50,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:50,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:50,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:50,157 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2019-11-28 00:25:50,157 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013568184] [2019-11-28 00:25:50,158 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1736371375] [2019-11-28 00:25:50,158 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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 [2019-11-28 00:25:50,203 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-11-28 00:25:50,203 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-28 00:25:50,205 INFO L255 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 16 conjunts are in the unsatisfiable core [2019-11-28 00:25:50,208 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 00:25:50,270 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2019-11-28 00:25:50,271 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 00:25:50,271 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2019-11-28 00:25:50,272 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352618560] [2019-11-28 00:25:50,273 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-28 00:25:50,273 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 00:25:50,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-28 00:25:50,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2019-11-28 00:25:50,274 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand 13 states. [2019-11-28 00:25:50,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 00:25:50,389 INFO L93 Difference]: Finished difference Result 36 states and 37 transitions. [2019-11-28 00:25:50,390 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-28 00:25:50,390 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 45 [2019-11-28 00:25:50,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 00:25:50,392 INFO L225 Difference]: With dead ends: 36 [2019-11-28 00:25:50,392 INFO L226 Difference]: Without dead ends: 32 [2019-11-28 00:25:50,393 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=130, Invalid=250, Unknown=0, NotChecked=0, Total=380 [2019-11-28 00:25:50,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-11-28 00:25:50,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2019-11-28 00:25:50,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-11-28 00:25:50,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2019-11-28 00:25:50,400 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 45 [2019-11-28 00:25:50,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 00:25:50,400 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2019-11-28 00:25:50,401 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-28 00:25:50,401 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2019-11-28 00:25:50,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2019-11-28 00:25:50,402 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 00:25:50,403 INFO L410 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 00:25:50,612 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 00:25:50,613 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 00:25:50,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 00:25:50,614 INFO L82 PathProgramCache]: Analyzing trace with hash -247823213, now seen corresponding path program 7 times [2019-11-28 00:25:50,614 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 00:25:50,615 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899767784] [2019-11-28 00:25:50,615 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 00:25:50,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:50,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:50,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:50,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:50,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:50,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:50,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:50,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:50,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:50,876 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2019-11-28 00:25:50,876 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899767784] [2019-11-28 00:25:50,877 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [390544342] [2019-11-28 00:25:50,877 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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 [2019-11-28 00:25:50,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:50,912 INFO L255 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 18 conjunts are in the unsatisfiable core [2019-11-28 00:25:50,915 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 00:25:50,972 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2019-11-28 00:25:50,973 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 00:25:50,974 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2019-11-28 00:25:50,974 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240015017] [2019-11-28 00:25:50,975 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-28 00:25:50,977 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 00:25:50,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-28 00:25:50,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2019-11-28 00:25:50,981 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand 14 states. [2019-11-28 00:25:51,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 00:25:51,110 INFO L93 Difference]: Finished difference Result 39 states and 40 transitions. [2019-11-28 00:25:51,111 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-28 00:25:51,111 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 51 [2019-11-28 00:25:51,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 00:25:51,112 INFO L225 Difference]: With dead ends: 39 [2019-11-28 00:25:51,112 INFO L226 Difference]: Without dead ends: 35 [2019-11-28 00:25:51,116 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=159, Invalid=303, Unknown=0, NotChecked=0, Total=462 [2019-11-28 00:25:51,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-11-28 00:25:51,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2019-11-28 00:25:51,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-11-28 00:25:51,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2019-11-28 00:25:51,125 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 51 [2019-11-28 00:25:51,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 00:25:51,126 INFO L462 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2019-11-28 00:25:51,126 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-28 00:25:51,127 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2019-11-28 00:25:51,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2019-11-28 00:25:51,130 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 00:25:51,130 INFO L410 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 00:25:51,334 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 00:25:51,335 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 00:25:51,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 00:25:51,336 INFO L82 PathProgramCache]: Analyzing trace with hash -1818636247, now seen corresponding path program 8 times [2019-11-28 00:25:51,336 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 00:25:51,337 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120241995] [2019-11-28 00:25:51,337 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 00:25:51,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:51,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:51,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:51,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:51,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:51,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:51,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:51,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:51,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:51,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:51,605 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2019-11-28 00:25:51,606 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120241995] [2019-11-28 00:25:51,606 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1307371529] [2019-11-28 00:25:51,606 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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 [2019-11-28 00:25:51,652 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-28 00:25:51,652 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-28 00:25:51,654 INFO L255 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 20 conjunts are in the unsatisfiable core [2019-11-28 00:25:51,657 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 00:25:51,732 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2019-11-28 00:25:51,733 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 00:25:51,733 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2019-11-28 00:25:51,733 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416105105] [2019-11-28 00:25:51,734 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-11-28 00:25:51,734 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 00:25:51,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-11-28 00:25:51,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2019-11-28 00:25:51,735 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand 15 states. [2019-11-28 00:25:51,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 00:25:51,880 INFO L93 Difference]: Finished difference Result 42 states and 43 transitions. [2019-11-28 00:25:51,880 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-28 00:25:51,880 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 57 [2019-11-28 00:25:51,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 00:25:51,882 INFO L225 Difference]: With dead ends: 42 [2019-11-28 00:25:51,882 INFO L226 Difference]: Without dead ends: 38 [2019-11-28 00:25:51,883 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=191, Invalid=361, Unknown=0, NotChecked=0, Total=552 [2019-11-28 00:25:51,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2019-11-28 00:25:51,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2019-11-28 00:25:51,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-11-28 00:25:51,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2019-11-28 00:25:51,893 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 57 [2019-11-28 00:25:51,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 00:25:51,894 INFO L462 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2019-11-28 00:25:51,894 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-11-28 00:25:51,894 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2019-11-28 00:25:51,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2019-11-28 00:25:51,896 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 00:25:51,896 INFO L410 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 00:25:52,097 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 00:25:52,097 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 00:25:52,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 00:25:52,098 INFO L82 PathProgramCache]: Analyzing trace with hash -2055304301, now seen corresponding path program 9 times [2019-11-28 00:25:52,098 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 00:25:52,098 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75192340] [2019-11-28 00:25:52,098 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 00:25:52,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:52,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:52,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:52,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:52,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:52,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:52,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:52,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:52,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:52,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:52,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:52,376 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2019-11-28 00:25:52,377 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75192340] [2019-11-28 00:25:52,377 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [16528288] [2019-11-28 00:25:52,377 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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 [2019-11-28 00:25:52,440 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2019-11-28 00:25:52,441 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-28 00:25:52,442 INFO L255 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 22 conjunts are in the unsatisfiable core [2019-11-28 00:25:52,453 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 00:25:52,536 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2019-11-28 00:25:52,536 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 00:25:52,536 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 16 [2019-11-28 00:25:52,537 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164160694] [2019-11-28 00:25:52,537 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-11-28 00:25:52,537 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 00:25:52,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-11-28 00:25:52,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2019-11-28 00:25:52,538 INFO L87 Difference]: Start difference. First operand 38 states and 39 transitions. Second operand 16 states. [2019-11-28 00:25:52,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 00:25:52,672 INFO L93 Difference]: Finished difference Result 45 states and 46 transitions. [2019-11-28 00:25:52,672 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-11-28 00:25:52,672 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 63 [2019-11-28 00:25:52,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 00:25:52,674 INFO L225 Difference]: With dead ends: 45 [2019-11-28 00:25:52,674 INFO L226 Difference]: Without dead ends: 41 [2019-11-28 00:25:52,675 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=226, Invalid=424, Unknown=0, NotChecked=0, Total=650 [2019-11-28 00:25:52,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2019-11-28 00:25:52,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2019-11-28 00:25:52,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-11-28 00:25:52,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2019-11-28 00:25:52,681 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 63 [2019-11-28 00:25:52,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 00:25:52,681 INFO L462 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2019-11-28 00:25:52,681 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-11-28 00:25:52,682 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2019-11-28 00:25:52,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2019-11-28 00:25:52,683 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 00:25:52,683 INFO L410 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 00:25:52,886 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 00:25:52,887 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 00:25:52,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 00:25:52,887 INFO L82 PathProgramCache]: Analyzing trace with hash -1172322647, now seen corresponding path program 10 times [2019-11-28 00:25:52,888 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 00:25:52,888 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181794587] [2019-11-28 00:25:52,888 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 00:25:52,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:52,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:53,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:53,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:53,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:53,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:53,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:53,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:53,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:53,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:53,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:53,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:53,621 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2019-11-28 00:25:53,622 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181794587] [2019-11-28 00:25:53,622 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1191200933] [2019-11-28 00:25:53,622 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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 [2019-11-28 00:25:53,692 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-28 00:25:53,693 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-28 00:25:53,694 INFO L255 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 47 conjunts are in the unsatisfiable core [2019-11-28 00:25:53,704 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 00:25:53,765 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2019-11-28 00:25:53,766 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 00:25:53,766 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2019-11-28 00:25:53,766 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832321389] [2019-11-28 00:25:53,767 INFO L442 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-11-28 00:25:53,767 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 00:25:53,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-11-28 00:25:53,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2019-11-28 00:25:53,768 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand 25 states. [2019-11-28 00:25:54,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 00:25:54,047 INFO L93 Difference]: Finished difference Result 48 states and 49 transitions. [2019-11-28 00:25:54,052 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-11-28 00:25:54,052 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 69 [2019-11-28 00:25:54,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 00:25:54,053 INFO L225 Difference]: With dead ends: 48 [2019-11-28 00:25:54,054 INFO L226 Difference]: Without dead ends: 44 [2019-11-28 00:25:54,054 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 90 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2019-11-28 00:25:54,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2019-11-28 00:25:54,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2019-11-28 00:25:54,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-11-28 00:25:54,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 45 transitions. [2019-11-28 00:25:54,060 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 45 transitions. Word has length 69 [2019-11-28 00:25:54,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 00:25:54,061 INFO L462 AbstractCegarLoop]: Abstraction has 44 states and 45 transitions. [2019-11-28 00:25:54,061 INFO L463 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-11-28 00:25:54,061 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 45 transitions. [2019-11-28 00:25:54,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2019-11-28 00:25:54,062 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 00:25:54,063 INFO L410 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 00:25:54,265 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 00:25:54,266 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 00:25:54,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 00:25:54,267 INFO L82 PathProgramCache]: Analyzing trace with hash -1452916077, now seen corresponding path program 11 times [2019-11-28 00:25:54,267 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 00:25:54,268 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131060366] [2019-11-28 00:25:54,268 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 00:25:54,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:54,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:54,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:54,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:54,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:54,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:54,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:54,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:54,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:54,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:54,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:54,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:54,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:54,644 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 165 proven. 22 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2019-11-28 00:25:54,644 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131060366] [2019-11-28 00:25:54,644 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [710095284] [2019-11-28 00:25:54,644 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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 [2019-11-28 00:25:54,707 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2019-11-28 00:25:54,707 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-28 00:25:54,709 INFO L255 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 26 conjunts are in the unsatisfiable core [2019-11-28 00:25:54,711 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 00:25:54,793 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 187 proven. 0 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2019-11-28 00:25:54,793 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-28 00:25:54,794 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [16] total 18 [2019-11-28 00:25:54,794 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091685560] [2019-11-28 00:25:54,795 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-11-28 00:25:54,795 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 00:25:54,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-11-28 00:25:54,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=205, Unknown=0, NotChecked=0, Total=306 [2019-11-28 00:25:54,796 INFO L87 Difference]: Start difference. First operand 44 states and 45 transitions. Second operand 16 states. [2019-11-28 00:25:55,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 00:25:55,006 INFO L93 Difference]: Finished difference Result 44 states and 45 transitions. [2019-11-28 00:25:55,007 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-11-28 00:25:55,007 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 75 [2019-11-28 00:25:55,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 00:25:55,008 INFO L225 Difference]: With dead ends: 44 [2019-11-28 00:25:55,008 INFO L226 Difference]: Without dead ends: 0 [2019-11-28 00:25:55,009 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=281, Invalid=589, Unknown=0, NotChecked=0, Total=870 [2019-11-28 00:25:55,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-11-28 00:25:55,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-11-28 00:25:55,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-11-28 00:25:55,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-11-28 00:25:55,010 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 75 [2019-11-28 00:25:55,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 00:25:55,010 INFO L462 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-11-28 00:25:55,010 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-11-28 00:25:55,010 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-11-28 00:25:55,011 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-11-28 00:25:55,211 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 00:25:55,215 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2019-11-28 00:25:55,236 INFO L246 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2019-11-28 00:25:55,236 INFO L246 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2019-11-28 00:25:55,236 INFO L246 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2019-11-28 00:25:55,237 INFO L246 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 13) no Hoare annotation was computed. [2019-11-28 00:25:55,237 INFO L246 CegarLoopResult]: For program point L13(line 13) no Hoare annotation was computed. [2019-11-28 00:25:55,237 INFO L246 CegarLoopResult]: For program point L12(lines 12 14) no Hoare annotation was computed. [2019-11-28 00:25:55,237 INFO L242 CegarLoopResult]: At program point L11(line 11) the Hoare annotation is: (and (<= ULTIMATE.start_main_~input~0 10) (<= 10 ULTIMATE.start_main_~input~0)) [2019-11-28 00:25:55,237 INFO L246 CegarLoopResult]: For program point L11-1(line 11) no Hoare annotation was computed. [2019-11-28 00:25:55,237 INFO L246 CegarLoopResult]: For program point L9(lines 9 15) no Hoare annotation was computed. [2019-11-28 00:25:55,237 INFO L246 CegarLoopResult]: For program point idFINAL(lines 4 7) no Hoare annotation was computed. [2019-11-28 00:25:55,237 INFO L246 CegarLoopResult]: For program point idEXIT(lines 4 7) no Hoare annotation was computed. [2019-11-28 00:25:55,238 INFO L249 CegarLoopResult]: At program point idENTRY(lines 4 7) the Hoare annotation is: true [2019-11-28 00:25:55,238 INFO L242 CegarLoopResult]: At program point L6(line 6) the Hoare annotation is: (= |id_#in~x| id_~x) [2019-11-28 00:25:55,238 INFO L246 CegarLoopResult]: For program point L5(line 5) no Hoare annotation was computed. [2019-11-28 00:25:55,238 INFO L246 CegarLoopResult]: For program point L6-1(line 6) no Hoare annotation was computed. [2019-11-28 00:25:55,242 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 12:25:55 BoogieIcfgContainer [2019-11-28 00:25:55,243 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-28 00:25:55,243 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-28 00:25:55,243 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-28 00:25:55,243 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-28 00:25:55,244 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 12:25:46" (3/4) ... [2019-11-28 00:25:55,247 INFO L137 WitnessPrinter]: Generating witness for correct program [2019-11-28 00:25:55,252 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure id [2019-11-28 00:25:55,257 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2019-11-28 00:25:55,257 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2019-11-28 00:25:55,295 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2019-11-28 00:25:55,296 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-28 00:25:55,298 INFO L168 Benchmark]: Toolchain (without parser) took 9891.39 ms. Allocated memory was 1.0 GB in the beginning and 1.3 GB in the end (delta: 273.2 MB). Free memory was 961.7 MB in the beginning and 1.0 GB in the end (delta: -71.9 MB). Peak memory consumption was 201.3 MB. Max. memory is 11.5 GB. [2019-11-28 00:25:55,299 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 1.0 GB. Free memory is still 987.2 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-28 00:25:55,300 INFO L168 Benchmark]: CACSL2BoogieTranslator took 338.70 ms. Allocated memory is still 1.0 GB. Free memory was 961.7 MB in the beginning and 951.0 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2019-11-28 00:25:55,300 INFO L168 Benchmark]: Boogie Procedure Inliner took 41.93 ms. Allocated memory is still 1.0 GB. Free memory is still 951.0 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-28 00:25:55,301 INFO L168 Benchmark]: Boogie Preprocessor took 85.14 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 90.2 MB). Free memory was 951.0 MB in the beginning and 1.1 GB in the end (delta: -128.3 MB). Peak memory consumption was 9.8 MB. Max. memory is 11.5 GB. [2019-11-28 00:25:55,301 INFO L168 Benchmark]: RCFGBuilder took 282.94 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 19.3 MB). Peak memory consumption was 19.3 MB. Max. memory is 11.5 GB. [2019-11-28 00:25:55,302 INFO L168 Benchmark]: TraceAbstraction took 9083.40 ms. Allocated memory was 1.1 GB in the beginning and 1.3 GB in the end (delta: 183.0 MB). Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 26.4 MB). Peak memory consumption was 209.3 MB. Max. memory is 11.5 GB. [2019-11-28 00:25:55,303 INFO L168 Benchmark]: Witness Printer took 52.64 ms. Allocated memory is still 1.3 GB. Free memory is still 1.0 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-28 00:25:55,306 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 1.0 GB. Free memory is still 987.2 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 338.70 ms. Allocated memory is still 1.0 GB. Free memory was 961.7 MB in the beginning and 951.0 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 41.93 ms. Allocated memory is still 1.0 GB. Free memory is still 951.0 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 85.14 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 90.2 MB). Free memory was 951.0 MB in the beginning and 1.1 GB in the end (delta: -128.3 MB). Peak memory consumption was 9.8 MB. Max. memory is 11.5 GB. * RCFGBuilder took 282.94 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 19.3 MB). Peak memory consumption was 19.3 MB. Max. memory is 11.5 GB. * TraceAbstraction took 9083.40 ms. Allocated memory was 1.1 GB in the beginning and 1.3 GB in the end (delta: 183.0 MB). Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 26.4 MB). Peak memory consumption was 209.3 MB. Max. memory is 11.5 GB. * Witness Printer took 52.64 ms. Allocated memory is still 1.3 GB. Free memory is still 1.0 GB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 13]: 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 - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 15 locations, 1 error locations. Result: SAFE, OverallTime: 8.9s, OverallIterations: 12, TraceHistogramMax: 12, AutomataDifference: 1.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 151 SDtfs, 252 SDslu, 945 SDs, 0 SdLazy, 713 SolverSat, 64 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 821 GetRequests, 620 SyntacticMatches, 2 SemanticMatches, 199 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 396 ImplicationChecksByTransitivity, 2.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=44occurred in iteration=11, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 12 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 3 LocationsWithAnnotation, 5 PreInvPairs, 5 NumberOfFragments, 11 HoareAnnotationTreeSize, 5 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 3 FomulaSimplificationsInter, 4 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 3.8s InterpolantComputationTime, 999 NumberOfCodeBlocks, 994 NumberOfCodeBlocksAsserted, 60 NumberOfCheckSat, 976 ConstructedInterpolants, 0 QuantifiedInterpolants, 141088 SizeOfPredicates, 77 NumberOfNonLiveVariables, 1157 ConjunctsInSsa, 199 ConjunctsInUnsatCore, 23 InterpolantComputations, 2 PerfectInterpolantSequences, 1936/3168 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...