./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursive-simple/fibo_5-1.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/fibo_5-1.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 c7b71b458b3f08f188a62c7539b715f43fd7f97d ......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 00:25:21,706 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-28 00:25:21,708 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-28 00:25:21,726 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-28 00:25:21,727 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-28 00:25:21,728 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-28 00:25:21,730 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-28 00:25:21,732 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-28 00:25:21,734 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-28 00:25:21,735 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-28 00:25:21,736 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-28 00:25:21,738 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-28 00:25:21,738 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-28 00:25:21,739 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-28 00:25:21,740 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-28 00:25:21,742 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-28 00:25:21,743 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-28 00:25:21,744 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-28 00:25:21,746 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-28 00:25:21,748 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-28 00:25:21,750 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-28 00:25:21,752 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-28 00:25:21,753 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-28 00:25:21,754 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-28 00:25:21,758 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-28 00:25:21,759 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-28 00:25:21,761 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-28 00:25:21,762 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-28 00:25:21,763 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-28 00:25:21,766 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-28 00:25:21,767 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-28 00:25:21,767 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-28 00:25:21,769 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-28 00:25:21,770 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-28 00:25:21,771 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-28 00:25:21,774 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-28 00:25:21,775 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-28 00:25:21,776 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-28 00:25:21,776 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-28 00:25:21,777 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-28 00:25:21,781 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-28 00:25:21,782 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-28 00:25:21,808 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-28 00:25:21,808 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-28 00:25:21,811 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-28 00:25:21,811 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-28 00:25:21,811 INFO L138 SettingsManager]: * Use SBE=true [2019-11-28 00:25:21,811 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-28 00:25:21,812 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-28 00:25:21,812 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-28 00:25:21,812 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-28 00:25:21,813 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-28 00:25:21,814 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-28 00:25:21,814 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-28 00:25:21,814 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-28 00:25:21,815 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-28 00:25:21,815 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-28 00:25:21,815 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-28 00:25:21,816 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-28 00:25:21,816 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-28 00:25:21,816 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-28 00:25:21,816 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-28 00:25:21,817 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-28 00:25:21,817 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-28 00:25:21,818 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-28 00:25:21,818 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-28 00:25:21,818 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-28 00:25:21,818 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-28 00:25:21,819 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-28 00:25:21,819 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-28 00:25:21,819 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 -> c7b71b458b3f08f188a62c7539b715f43fd7f97d [2019-11-28 00:25:22,209 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-28 00:25:22,230 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-28 00:25:22,233 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-28 00:25:22,236 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-28 00:25:22,237 INFO L275 PluginConnector]: CDTParser initialized [2019-11-28 00:25:22,238 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive-simple/fibo_5-1.c [2019-11-28 00:25:22,322 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5dbc7bf0f/e7af484b27d144629d50a94a170f0c10/FLAG9495a4555 [2019-11-28 00:25:22,758 INFO L306 CDTParser]: Found 1 translation units. [2019-11-28 00:25:22,759 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive-simple/fibo_5-1.c [2019-11-28 00:25:22,767 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5dbc7bf0f/e7af484b27d144629d50a94a170f0c10/FLAG9495a4555 [2019-11-28 00:25:23,122 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5dbc7bf0f/e7af484b27d144629d50a94a170f0c10 [2019-11-28 00:25:23,126 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-28 00:25:23,128 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-28 00:25:23,129 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-28 00:25:23,130 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-28 00:25:23,134 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-28 00:25:23,135 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 12:25:23" (1/1) ... [2019-11-28 00:25:23,139 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3a288275 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:25:23, skipping insertion in model container [2019-11-28 00:25:23,139 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 12:25:23" (1/1) ... [2019-11-28 00:25:23,147 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-28 00:25:23,165 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-28 00:25:23,339 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-28 00:25:23,344 INFO L203 MainTranslator]: Completed pre-run [2019-11-28 00:25:23,360 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-28 00:25:23,376 INFO L208 MainTranslator]: Completed translation [2019-11-28 00:25:23,376 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:25:23 WrapperNode [2019-11-28 00:25:23,377 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-28 00:25:23,378 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-28 00:25:23,378 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-28 00:25:23,378 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-28 00:25:23,388 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:25:23" (1/1) ... [2019-11-28 00:25:23,394 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:25:23" (1/1) ... [2019-11-28 00:25:23,415 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-28 00:25:23,415 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-28 00:25:23,416 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-28 00:25:23,416 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-28 00:25:23,482 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:25:23" (1/1) ... [2019-11-28 00:25:23,482 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:25:23" (1/1) ... [2019-11-28 00:25:23,483 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:25:23" (1/1) ... [2019-11-28 00:25:23,483 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:25:23" (1/1) ... [2019-11-28 00:25:23,486 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:25:23" (1/1) ... [2019-11-28 00:25:23,489 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:25:23" (1/1) ... [2019-11-28 00:25:23,490 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:25:23" (1/1) ... [2019-11-28 00:25:23,492 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-28 00:25:23,493 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-28 00:25:23,493 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-28 00:25:23,493 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-28 00:25:23,494 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:25:23" (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 00:25:23,572 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-28 00:25:23,572 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-28 00:25:23,573 INFO L130 BoogieDeclarations]: Found specification of procedure fibo [2019-11-28 00:25:23,573 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo [2019-11-28 00:25:23,761 INFO L292 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-28 00:25:23,762 INFO L297 CfgBuilder]: Removed 4 assume(true) statements. [2019-11-28 00:25:23,763 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 12:25:23 BoogieIcfgContainer [2019-11-28 00:25:23,763 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-28 00:25:23,765 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-28 00:25:23,765 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-28 00:25:23,768 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-28 00:25:23,769 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 12:25:23" (1/3) ... [2019-11-28 00:25:23,769 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59824a99 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 12:25:23, skipping insertion in model container [2019-11-28 00:25:23,770 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:25:23" (2/3) ... [2019-11-28 00:25:23,770 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59824a99 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 12:25:23, skipping insertion in model container [2019-11-28 00:25:23,771 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 12:25:23" (3/3) ... [2019-11-28 00:25:23,772 INFO L109 eAbstractionObserver]: Analyzing ICFG fibo_5-1.c [2019-11-28 00:25:23,783 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-28 00:25:23,790 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-28 00:25:23,802 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-28 00:25:23,828 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-28 00:25:23,828 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-28 00:25:23,828 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-28 00:25:23,829 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-28 00:25:23,829 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-28 00:25:23,829 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-28 00:25:23,829 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-28 00:25:23,830 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-28 00:25:23,847 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2019-11-28 00:25:23,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-11-28 00:25:23,854 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 00:25:23,855 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 00:25:23,856 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 00:25:23,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 00:25:23,862 INFO L82 PathProgramCache]: Analyzing trace with hash -1007516703, now seen corresponding path program 1 times [2019-11-28 00:25:23,871 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 00:25:23,871 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245717600] [2019-11-28 00:25:23,872 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 00:25:23,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:24,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:24,063 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 00:25:24,064 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245717600] [2019-11-28 00:25:24,069 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-28 00:25:24,069 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-28 00:25:24,071 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869619361] [2019-11-28 00:25:24,077 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-28 00:25:24,077 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 00:25:24,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-28 00:25:24,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-28 00:25:24,116 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 5 states. [2019-11-28 00:25:24,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 00:25:24,273 INFO L93 Difference]: Finished difference Result 29 states and 35 transitions. [2019-11-28 00:25:24,274 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-28 00:25:24,275 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2019-11-28 00:25:24,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 00:25:24,286 INFO L225 Difference]: With dead ends: 29 [2019-11-28 00:25:24,286 INFO L226 Difference]: Without dead ends: 17 [2019-11-28 00:25:24,290 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 00:25:24,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2019-11-28 00:25:24,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2019-11-28 00:25:24,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-11-28 00:25:24,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2019-11-28 00:25:24,332 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 9 [2019-11-28 00:25:24,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 00:25:24,333 INFO L462 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2019-11-28 00:25:24,333 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-28 00:25:24,333 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2019-11-28 00:25:24,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-28 00:25:24,335 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 00:25:24,335 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 00:25:24,335 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 00:25:24,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 00:25:24,336 INFO L82 PathProgramCache]: Analyzing trace with hash -453503986, now seen corresponding path program 1 times [2019-11-28 00:25:24,336 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 00:25:24,336 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518055489] [2019-11-28 00:25:24,337 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 00:25:24,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:24,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:24,403 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 00:25:24,403 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518055489] [2019-11-28 00:25:24,404 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-28 00:25:24,404 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-28 00:25:24,404 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028586872] [2019-11-28 00:25:24,406 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-28 00:25:24,406 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 00:25:24,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-28 00:25:24,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-28 00:25:24,407 INFO L87 Difference]: Start difference. First operand 17 states and 21 transitions. Second operand 5 states. [2019-11-28 00:25:24,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 00:25:24,489 INFO L93 Difference]: Finished difference Result 23 states and 28 transitions. [2019-11-28 00:25:24,489 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-28 00:25:24,490 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2019-11-28 00:25:24,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 00:25:24,491 INFO L225 Difference]: With dead ends: 23 [2019-11-28 00:25:24,491 INFO L226 Difference]: Without dead ends: 19 [2019-11-28 00:25:24,492 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 00:25:24,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2019-11-28 00:25:24,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 17. [2019-11-28 00:25:24,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-11-28 00:25:24,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2019-11-28 00:25:24,500 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 10 [2019-11-28 00:25:24,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 00:25:24,500 INFO L462 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2019-11-28 00:25:24,501 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-28 00:25:24,501 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2019-11-28 00:25:24,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-11-28 00:25:24,502 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 00:25:24,503 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 00:25:24,503 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 00:25:24,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 00:25:24,504 INFO L82 PathProgramCache]: Analyzing trace with hash 511906889, now seen corresponding path program 1 times [2019-11-28 00:25:24,504 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 00:25:24,504 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214750090] [2019-11-28 00:25:24,504 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 00:25:24,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:24,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:24,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:24,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:24,685 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-28 00:25:24,689 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214750090] [2019-11-28 00:25:24,690 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1722471841] [2019-11-28 00:25:24,690 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 00:25:24,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:24,736 INFO L255 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-28 00:25:24,746 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 00:25:24,812 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-28 00:25:24,813 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 00:25:24,814 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2019-11-28 00:25:24,816 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510101449] [2019-11-28 00:25:24,817 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-28 00:25:24,818 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 00:25:24,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-28 00:25:24,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2019-11-28 00:25:24,820 INFO L87 Difference]: Start difference. First operand 17 states and 21 transitions. Second operand 8 states. [2019-11-28 00:25:24,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 00:25:24,954 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2019-11-28 00:25:24,958 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-28 00:25:24,958 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 22 [2019-11-28 00:25:24,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 00:25:24,960 INFO L225 Difference]: With dead ends: 41 [2019-11-28 00:25:24,960 INFO L226 Difference]: Without dead ends: 26 [2019-11-28 00:25:24,961 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-11-28 00:25:24,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-11-28 00:25:24,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 24. [2019-11-28 00:25:24,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-11-28 00:25:24,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 30 transitions. [2019-11-28 00:25:24,971 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 30 transitions. Word has length 22 [2019-11-28 00:25:24,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 00:25:24,971 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 30 transitions. [2019-11-28 00:25:24,971 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-28 00:25:24,972 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 30 transitions. [2019-11-28 00:25:24,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-11-28 00:25:24,973 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 00:25:24,974 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 00:25:25,179 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 00:25:25,180 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 00:25:25,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 00:25:25,182 INFO L82 PathProgramCache]: Analyzing trace with hash 178931364, now seen corresponding path program 1 times [2019-11-28 00:25:25,182 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 00:25:25,183 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665379023] [2019-11-28 00:25:25,183 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 00:25:25,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:25,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:25,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:25,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:25,382 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-28 00:25:25,383 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665379023] [2019-11-28 00:25:25,383 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [617043753] [2019-11-28 00:25:25,384 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 00:25:25,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:25,431 INFO L255 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-28 00:25:25,433 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 00:25:25,463 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-28 00:25:25,464 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 00:25:25,464 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2019-11-28 00:25:25,465 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102894130] [2019-11-28 00:25:25,466 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-28 00:25:25,466 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 00:25:25,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-28 00:25:25,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2019-11-28 00:25:25,467 INFO L87 Difference]: Start difference. First operand 24 states and 30 transitions. Second operand 8 states. [2019-11-28 00:25:25,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 00:25:25,611 INFO L93 Difference]: Finished difference Result 47 states and 66 transitions. [2019-11-28 00:25:25,611 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-28 00:25:25,612 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 23 [2019-11-28 00:25:25,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 00:25:25,615 INFO L225 Difference]: With dead ends: 47 [2019-11-28 00:25:25,615 INFO L226 Difference]: Without dead ends: 43 [2019-11-28 00:25:25,616 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-11-28 00:25:25,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2019-11-28 00:25:25,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 40. [2019-11-28 00:25:25,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2019-11-28 00:25:25,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 58 transitions. [2019-11-28 00:25:25,630 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 58 transitions. Word has length 23 [2019-11-28 00:25:25,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 00:25:25,630 INFO L462 AbstractCegarLoop]: Abstraction has 40 states and 58 transitions. [2019-11-28 00:25:25,631 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-28 00:25:25,631 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 58 transitions. [2019-11-28 00:25:25,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2019-11-28 00:25:25,633 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 00:25:25,633 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2019-11-28 00:25:25,846 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 00:25:25,847 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 00:25:25,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 00:25:25,848 INFO L82 PathProgramCache]: Analyzing trace with hash -1840059703, now seen corresponding path program 2 times [2019-11-28 00:25:25,849 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 00:25:25,849 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464011294] [2019-11-28 00:25:25,849 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 00:25:25,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:25,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:25,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:25,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:26,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:26,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:26,028 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 9 proven. 18 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-11-28 00:25:26,028 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464011294] [2019-11-28 00:25:26,029 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [524179134] [2019-11-28 00:25:26,029 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 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 00:25:26,075 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-28 00:25:26,075 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-28 00:25:26,077 INFO L255 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-28 00:25:26,081 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 00:25:26,127 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-11-28 00:25:26,128 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 00:25:26,128 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2019-11-28 00:25:26,128 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109906424] [2019-11-28 00:25:26,129 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-28 00:25:26,129 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 00:25:26,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-28 00:25:26,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2019-11-28 00:25:26,130 INFO L87 Difference]: Start difference. First operand 40 states and 58 transitions. Second operand 10 states. [2019-11-28 00:25:26,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 00:25:26,282 INFO L93 Difference]: Finished difference Result 67 states and 101 transitions. [2019-11-28 00:25:26,282 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-28 00:25:26,282 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 35 [2019-11-28 00:25:26,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 00:25:26,284 INFO L225 Difference]: With dead ends: 67 [2019-11-28 00:25:26,284 INFO L226 Difference]: Without dead ends: 29 [2019-11-28 00:25:26,285 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2019-11-28 00:25:26,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-11-28 00:25:26,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 26. [2019-11-28 00:25:26,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-11-28 00:25:26,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 32 transitions. [2019-11-28 00:25:26,293 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 32 transitions. Word has length 35 [2019-11-28 00:25:26,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 00:25:26,293 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 32 transitions. [2019-11-28 00:25:26,294 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-28 00:25:26,294 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 32 transitions. [2019-11-28 00:25:26,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-11-28 00:25:26,295 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 00:25:26,295 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 00:25:26,496 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 00:25:26,497 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 00:25:26,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 00:25:26,498 INFO L82 PathProgramCache]: Analyzing trace with hash 624826665, now seen corresponding path program 2 times [2019-11-28 00:25:26,498 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 00:25:26,499 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471231105] [2019-11-28 00:25:26,499 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 00:25:26,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:26,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:26,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:26,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:26,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:26,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:26,689 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-11-28 00:25:26,690 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471231105] [2019-11-28 00:25:26,690 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1846545325] [2019-11-28 00:25:26,691 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 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 00:25:26,728 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-28 00:25:26,728 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-28 00:25:26,729 INFO L255 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-28 00:25:26,732 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 00:25:26,757 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-11-28 00:25:26,757 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 00:25:26,758 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 10 [2019-11-28 00:25:26,758 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19142614] [2019-11-28 00:25:26,759 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-28 00:25:26,759 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 00:25:26,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-28 00:25:26,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2019-11-28 00:25:26,760 INFO L87 Difference]: Start difference. First operand 26 states and 32 transitions. Second operand 10 states. [2019-11-28 00:25:26,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 00:25:26,896 INFO L93 Difference]: Finished difference Result 52 states and 72 transitions. [2019-11-28 00:25:26,896 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-28 00:25:26,897 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 37 [2019-11-28 00:25:26,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 00:25:26,899 INFO L225 Difference]: With dead ends: 52 [2019-11-28 00:25:26,899 INFO L226 Difference]: Without dead ends: 48 [2019-11-28 00:25:26,900 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2019-11-28 00:25:26,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2019-11-28 00:25:26,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 42. [2019-11-28 00:25:26,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-11-28 00:25:26,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 59 transitions. [2019-11-28 00:25:26,912 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 59 transitions. Word has length 37 [2019-11-28 00:25:26,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 00:25:26,913 INFO L462 AbstractCegarLoop]: Abstraction has 42 states and 59 transitions. [2019-11-28 00:25:26,913 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-28 00:25:26,913 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 59 transitions. [2019-11-28 00:25:26,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2019-11-28 00:25:26,916 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 00:25:26,917 INFO L410 BasicCegarLoop]: trace histogram [9, 9, 6, 4, 4, 4, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1] [2019-11-28 00:25:27,129 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 00:25:27,130 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 00:25:27,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 00:25:27,130 INFO L82 PathProgramCache]: Analyzing trace with hash -99212631, now seen corresponding path program 3 times [2019-11-28 00:25:27,130 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 00:25:27,131 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432487046] [2019-11-28 00:25:27,131 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 00:25:27,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:27,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:27,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:27,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:27,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:27,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:27,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:27,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:27,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:27,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:27,368 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 36 proven. 66 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2019-11-28 00:25:27,368 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432487046] [2019-11-28 00:25:27,369 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1515141144] [2019-11-28 00:25:27,369 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 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 00:25:27,411 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2019-11-28 00:25:27,412 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-28 00:25:27,413 INFO L255 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-28 00:25:27,416 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 00:25:27,487 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 64 proven. 24 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2019-11-28 00:25:27,487 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 00:25:27,488 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7] total 15 [2019-11-28 00:25:27,488 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081202238] [2019-11-28 00:25:27,489 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-11-28 00:25:27,489 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 00:25:27,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-11-28 00:25:27,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2019-11-28 00:25:27,490 INFO L87 Difference]: Start difference. First operand 42 states and 59 transitions. Second operand 15 states. [2019-11-28 00:25:27,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 00:25:27,929 INFO L93 Difference]: Finished difference Result 89 states and 139 transitions. [2019-11-28 00:25:27,932 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-11-28 00:25:27,932 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 63 [2019-11-28 00:25:27,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 00:25:27,935 INFO L225 Difference]: With dead ends: 89 [2019-11-28 00:25:27,941 INFO L226 Difference]: Without dead ends: 49 [2019-11-28 00:25:27,943 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=145, Invalid=407, Unknown=0, NotChecked=0, Total=552 [2019-11-28 00:25:27,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2019-11-28 00:25:27,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 46. [2019-11-28 00:25:27,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2019-11-28 00:25:27,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 60 transitions. [2019-11-28 00:25:27,964 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 60 transitions. Word has length 63 [2019-11-28 00:25:27,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 00:25:27,965 INFO L462 AbstractCegarLoop]: Abstraction has 46 states and 60 transitions. [2019-11-28 00:25:27,965 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-11-28 00:25:27,966 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 60 transitions. [2019-11-28 00:25:27,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2019-11-28 00:25:27,968 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 00:25:27,968 INFO L410 BasicCegarLoop]: trace histogram [15, 15, 12, 7, 7, 7, 7, 7, 7, 7, 5, 3, 1, 1, 1, 1, 1, 1] [2019-11-28 00:25:28,183 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 00:25:28,184 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 00:25:28,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 00:25:28,184 INFO L82 PathProgramCache]: Analyzing trace with hash 548614988, now seen corresponding path program 4 times [2019-11-28 00:25:28,184 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 00:25:28,184 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312049165] [2019-11-28 00:25:28,184 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 00:25:28,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:28,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:28,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:28,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:28,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:28,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:28,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:28,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:28,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:28,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:28,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:28,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:28,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:28,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:28,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:28,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:28,694 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 0 proven. 185 refuted. 0 times theorem prover too weak. 385 trivial. 0 not checked. [2019-11-28 00:25:28,695 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312049165] [2019-11-28 00:25:28,695 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1881333950] [2019-11-28 00:25:28,695 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 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 00:25:28,754 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-28 00:25:28,754 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-28 00:25:28,756 INFO L255 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 63 conjunts are in the unsatisfiable core [2019-11-28 00:25:28,761 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 00:25:29,051 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 0 proven. 185 refuted. 0 times theorem prover too weak. 385 trivial. 0 not checked. [2019-11-28 00:25:29,052 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 00:25:29,052 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 20 [2019-11-28 00:25:29,052 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626391681] [2019-11-28 00:25:29,053 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-11-28 00:25:29,053 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 00:25:29,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-11-28 00:25:29,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=335, Unknown=0, NotChecked=0, Total=380 [2019-11-28 00:25:29,054 INFO L87 Difference]: Start difference. First operand 46 states and 60 transitions. Second operand 20 states. [2019-11-28 00:25:29,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 00:25:29,296 INFO L93 Difference]: Finished difference Result 71 states and 102 transitions. [2019-11-28 00:25:29,297 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-11-28 00:25:29,297 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 105 [2019-11-28 00:25:29,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 00:25:29,299 INFO L225 Difference]: With dead ends: 71 [2019-11-28 00:25:29,299 INFO L226 Difference]: Without dead ends: 67 [2019-11-28 00:25:29,300 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 141 SyntacticMatches, 8 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=45, Invalid=335, Unknown=0, NotChecked=0, Total=380 [2019-11-28 00:25:29,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2019-11-28 00:25:29,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 56. [2019-11-28 00:25:29,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2019-11-28 00:25:29,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 81 transitions. [2019-11-28 00:25:29,314 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 81 transitions. Word has length 105 [2019-11-28 00:25:29,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 00:25:29,315 INFO L462 AbstractCegarLoop]: Abstraction has 56 states and 81 transitions. [2019-11-28 00:25:29,315 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-11-28 00:25:29,315 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 81 transitions. [2019-11-28 00:25:29,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2019-11-28 00:25:29,318 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 00:25:29,318 INFO L410 BasicCegarLoop]: trace histogram [21, 21, 17, 10, 10, 10, 10, 10, 10, 10, 7, 4, 1, 1, 1, 1, 1, 1] [2019-11-28 00:25:29,530 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 00:25:29,530 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 00:25:29,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 00:25:29,531 INFO L82 PathProgramCache]: Analyzing trace with hash -1256539154, now seen corresponding path program 5 times [2019-11-28 00:25:29,532 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 00:25:29,532 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516452560] [2019-11-28 00:25:29,532 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 00:25:29,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:29,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:29,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:29,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:29,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:29,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:29,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:29,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:29,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:29,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:29,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:29,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:29,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:29,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:29,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:29,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:29,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:29,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:30,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:30,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:30,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:30,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:30,070 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 309 proven. 340 refuted. 0 times theorem prover too weak. 507 trivial. 0 not checked. [2019-11-28 00:25:30,070 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516452560] [2019-11-28 00:25:30,071 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1176552451] [2019-11-28 00:25:30,071 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 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 00:25:30,153 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2019-11-28 00:25:30,154 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-28 00:25:30,155 INFO L255 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 18 conjunts are in the unsatisfiable core [2019-11-28 00:25:30,175 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 00:25:30,302 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 353 proven. 303 refuted. 0 times theorem prover too weak. 500 trivial. 0 not checked. [2019-11-28 00:25:30,303 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 00:25:30,303 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 13] total 24 [2019-11-28 00:25:30,306 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603704286] [2019-11-28 00:25:30,307 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-11-28 00:25:30,307 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 00:25:30,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-11-28 00:25:30,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=440, Unknown=0, NotChecked=0, Total=552 [2019-11-28 00:25:30,309 INFO L87 Difference]: Start difference. First operand 56 states and 81 transitions. Second operand 24 states. [2019-11-28 00:25:30,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 00:25:30,780 INFO L93 Difference]: Finished difference Result 123 states and 212 transitions. [2019-11-28 00:25:30,781 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-11-28 00:25:30,781 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 146 [2019-11-28 00:25:30,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 00:25:30,783 INFO L225 Difference]: With dead ends: 123 [2019-11-28 00:25:30,783 INFO L226 Difference]: Without dead ends: 72 [2019-11-28 00:25:30,784 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 271 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=245, Invalid=877, Unknown=0, NotChecked=0, Total=1122 [2019-11-28 00:25:30,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2019-11-28 00:25:30,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 59. [2019-11-28 00:25:30,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2019-11-28 00:25:30,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 74 transitions. [2019-11-28 00:25:30,796 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 74 transitions. Word has length 146 [2019-11-28 00:25:30,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 00:25:30,797 INFO L462 AbstractCegarLoop]: Abstraction has 59 states and 74 transitions. [2019-11-28 00:25:30,797 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-11-28 00:25:30,797 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 74 transitions. [2019-11-28 00:25:30,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2019-11-28 00:25:30,807 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 00:25:30,807 INFO L410 BasicCegarLoop]: trace histogram [31, 31, 25, 15, 15, 15, 15, 15, 15, 15, 10, 6, 1, 1, 1, 1, 1, 1] [2019-11-28 00:25:31,011 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 00:25:31,012 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 00:25:31,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 00:25:31,013 INFO L82 PathProgramCache]: Analyzing trace with hash 938070515, now seen corresponding path program 6 times [2019-11-28 00:25:31,013 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 00:25:31,014 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313160368] [2019-11-28 00:25:31,014 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 00:25:31,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:31,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:31,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:31,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:31,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:31,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:31,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:31,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:31,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:31,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:31,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:31,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:31,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:31,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:31,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:31,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:31,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:31,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:31,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:31,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:31,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:31,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:31,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:31,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:31,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:31,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:31,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:31,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:31,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:31,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:31,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:31,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:31,720 INFO L134 CoverageAnalysis]: Checked inductivity of 2580 backedges. 401 proven. 810 refuted. 0 times theorem prover too weak. 1369 trivial. 0 not checked. [2019-11-28 00:25:31,720 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313160368] [2019-11-28 00:25:31,721 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1886326689] [2019-11-28 00:25:31,721 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 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 00:25:31,798 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2019-11-28 00:25:31,798 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-28 00:25:31,799 INFO L255 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-28 00:25:31,804 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 00:25:31,930 INFO L134 CoverageAnalysis]: Checked inductivity of 2580 backedges. 246 proven. 374 refuted. 0 times theorem prover too weak. 1960 trivial. 0 not checked. [2019-11-28 00:25:31,930 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 00:25:31,930 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 9] total 27 [2019-11-28 00:25:31,931 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808915939] [2019-11-28 00:25:31,932 INFO L442 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-11-28 00:25:31,932 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 00:25:31,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-11-28 00:25:31,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=559, Unknown=0, NotChecked=0, Total=702 [2019-11-28 00:25:31,933 INFO L87 Difference]: Start difference. First operand 59 states and 74 transitions. Second operand 27 states. [2019-11-28 00:25:32,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 00:25:32,498 INFO L93 Difference]: Finished difference Result 115 states and 158 transitions. [2019-11-28 00:25:32,501 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-11-28 00:25:32,501 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 214 [2019-11-28 00:25:32,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 00:25:32,502 INFO L225 Difference]: With dead ends: 115 [2019-11-28 00:25:32,502 INFO L226 Difference]: Without dead ends: 0 [2019-11-28 00:25:32,505 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 312 GetRequests, 271 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 415 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=383, Invalid=1339, Unknown=0, NotChecked=0, Total=1722 [2019-11-28 00:25:32,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-11-28 00:25:32,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-11-28 00:25:32,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-11-28 00:25:32,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-11-28 00:25:32,505 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 214 [2019-11-28 00:25:32,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 00:25:32,506 INFO L462 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-11-28 00:25:32,506 INFO L463 AbstractCegarLoop]: Interpolant automaton has 27 states. [2019-11-28 00:25:32,506 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-11-28 00:25:32,506 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-11-28 00:25:32,710 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 00:25:32,712 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2019-11-28 00:25:32,999 WARN L192 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 37 [2019-11-28 00:25:33,067 INFO L246 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2019-11-28 00:25:33,068 INFO L246 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2019-11-28 00:25:33,068 INFO L242 CegarLoopResult]: At program point L29(lines 23 30) the Hoare annotation is: (<= 5 ULTIMATE.start_main_~x~0) [2019-11-28 00:25:33,068 INFO L246 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2019-11-28 00:25:33,068 INFO L246 CegarLoopResult]: For program point L27(line 27) no Hoare annotation was computed. [2019-11-28 00:25:33,068 INFO L246 CegarLoopResult]: For program point L26(lines 26 28) no Hoare annotation was computed. [2019-11-28 00:25:33,068 INFO L242 CegarLoopResult]: At program point L25(line 25) the Hoare annotation is: (and (<= 5 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~x~0 5)) [2019-11-28 00:25:33,068 INFO L246 CegarLoopResult]: For program point L25-1(line 25) no Hoare annotation was computed. [2019-11-28 00:25:33,069 INFO L246 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 27) no Hoare annotation was computed. [2019-11-28 00:25:33,069 INFO L246 CegarLoopResult]: For program point L26-2(lines 26 28) no Hoare annotation was computed. [2019-11-28 00:25:33,069 INFO L246 CegarLoopResult]: For program point fiboEXIT(lines 5 13) no Hoare annotation was computed. [2019-11-28 00:25:33,069 INFO L246 CegarLoopResult]: For program point fiboFINAL(lines 5 13) no Hoare annotation was computed. [2019-11-28 00:25:33,069 INFO L242 CegarLoopResult]: At program point L11(line 11) the Hoare annotation is: (and (or (not (<= |fibo_#in~n| 5)) (= fibo_~n |fibo_#in~n|)) (or (not (<= |fibo_#in~n| 4)) (< 1 fibo_~n))) [2019-11-28 00:25:33,069 INFO L246 CegarLoopResult]: For program point L11-1(line 11) no Hoare annotation was computed. [2019-11-28 00:25:33,069 INFO L242 CegarLoopResult]: At program point L11-2(line 11) the Hoare annotation is: (let ((.cse2 (= fibo_~n |fibo_#in~n|)) (.cse3 (<= |fibo_#t~ret0| 1)) (.cse4 (<= 1 |fibo_#t~ret0|)) (.cse5 (<= 3 fibo_~n))) (let ((.cse0 (<= |fibo_#in~n| 4)) (.cse1 (and .cse2 (<= fibo_~n 3) .cse3 .cse4 .cse5))) (and (or (not (<= |fibo_#in~n| 5)) (and (<= 3 |fibo_#t~ret0|) (<= |fibo_#t~ret0| 3) (<= fibo_~n 5) (<= 5 fibo_~n)) .cse0) (or .cse1 (not (<= 3 |fibo_#in~n|)) (not (<= |fibo_#in~n| 3))) (or (not .cse0) .cse1 (and .cse2 .cse3 .cse4 (<= fibo_~n 2) (< 1 fibo_~n)) (and .cse2 (<= 2 |fibo_#t~ret0|) (<= |fibo_#t~ret0| 2) .cse5))))) [2019-11-28 00:25:33,069 INFO L246 CegarLoopResult]: For program point L8(lines 8 12) no Hoare annotation was computed. [2019-11-28 00:25:33,070 INFO L246 CegarLoopResult]: For program point L11-3(line 11) no Hoare annotation was computed. [2019-11-28 00:25:33,070 INFO L246 CegarLoopResult]: For program point L6(lines 6 12) no Hoare annotation was computed. [2019-11-28 00:25:33,070 INFO L249 CegarLoopResult]: At program point fiboENTRY(lines 5 13) the Hoare annotation is: true [2019-11-28 00:25:33,084 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 12:25:33 BoogieIcfgContainer [2019-11-28 00:25:33,084 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-28 00:25:33,084 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-28 00:25:33,084 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-28 00:25:33,085 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-28 00:25:33,085 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 12:25:23" (3/4) ... [2019-11-28 00:25:33,089 INFO L137 WitnessPrinter]: Generating witness for correct program [2019-11-28 00:25:33,095 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure fibo [2019-11-28 00:25:33,099 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2019-11-28 00:25:33,099 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2019-11-28 00:25:33,144 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2019-11-28 00:25:33,144 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-28 00:25:33,145 INFO L168 Benchmark]: Toolchain (without parser) took 10017.76 ms. Allocated memory was 1.0 GB in the beginning and 1.3 GB in the end (delta: 283.1 MB). Free memory was 960.4 MB in the beginning and 1.2 GB in the end (delta: -229.8 MB). Peak memory consumption was 53.3 MB. Max. memory is 11.5 GB. [2019-11-28 00:25:33,146 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 00:25:33,146 INFO L168 Benchmark]: CACSL2BoogieTranslator took 247.66 ms. Allocated memory is still 1.0 GB. Free memory was 960.4 MB in the beginning and 949.6 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2019-11-28 00:25:33,147 INFO L168 Benchmark]: Boogie Procedure Inliner took 37.49 ms. Allocated memory is still 1.0 GB. Free memory is still 949.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-28 00:25:33,148 INFO L168 Benchmark]: Boogie Preprocessor took 77.02 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 93.8 MB). Free memory was 949.6 MB in the beginning and 1.1 GB in the end (delta: -140.4 MB). Peak memory consumption was 9.8 MB. Max. memory is 11.5 GB. [2019-11-28 00:25:33,148 INFO L168 Benchmark]: RCFGBuilder took 270.94 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: 20.6 MB). Peak memory consumption was 20.6 MB. Max. memory is 11.5 GB. [2019-11-28 00:25:33,149 INFO L168 Benchmark]: TraceAbstraction took 9319.42 ms. Allocated memory was 1.1 GB in the beginning and 1.3 GB in the end (delta: 189.3 MB). Free memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: -120.8 MB). Peak memory consumption was 68.5 MB. Max. memory is 11.5 GB. [2019-11-28 00:25:33,149 INFO L168 Benchmark]: Witness Printer took 59.48 ms. Allocated memory is still 1.3 GB. Free memory is still 1.2 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-28 00:25:33,152 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 247.66 ms. Allocated memory is still 1.0 GB. Free memory was 960.4 MB in the beginning and 949.6 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 37.49 ms. Allocated memory is still 1.0 GB. Free memory is still 949.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 77.02 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 93.8 MB). Free memory was 949.6 MB in the beginning and 1.1 GB in the end (delta: -140.4 MB). Peak memory consumption was 9.8 MB. Max. memory is 11.5 GB. * RCFGBuilder took 270.94 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: 20.6 MB). Peak memory consumption was 20.6 MB. Max. memory is 11.5 GB. * TraceAbstraction took 9319.42 ms. Allocated memory was 1.1 GB in the beginning and 1.3 GB in the end (delta: 189.3 MB). Free memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: -120.8 MB). Peak memory consumption was 68.5 MB. Max. memory is 11.5 GB. * Witness Printer took 59.48 ms. Allocated memory is still 1.3 GB. Free memory is still 1.2 GB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 27]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 23]: Loop Invariant Derived loop invariant: 5 <= x - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 19 locations, 1 error locations. Result: SAFE, OverallTime: 8.8s, OverallIterations: 10, TraceHistogramMax: 31, AutomataDifference: 2.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.3s, HoareTripleCheckerStatistics: 183 SDtfs, 419 SDslu, 822 SDs, 0 SdLazy, 1385 SolverSat, 417 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 992 GetRequests, 827 SyntacticMatches, 9 SemanticMatches, 156 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 839 ImplicationChecksByTransitivity, 2.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=59occurred in iteration=9, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 10 MinimizatonAttempts, 43 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 5 LocationsWithAnnotation, 134 PreInvPairs, 157 NumberOfFragments, 125 HoareAnnotationTreeSize, 134 FomulaSimplifications, 185 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 5 FomulaSimplificationsInter, 312 FormulaSimplificationTreeSizeReductionInter, 0.2s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 3.4s InterpolantComputationTime, 1309 NumberOfCodeBlocks, 1157 NumberOfCodeBlocksAsserted, 56 NumberOfCheckSat, 1291 ConstructedInterpolants, 0 QuantifiedInterpolants, 365059 SizeOfPredicates, 33 NumberOfNonLiveVariables, 1110 ConjunctsInSsa, 128 ConjunctsInUnsatCore, 18 InterpolantComputations, 2 PerfectInterpolantSequences, 6820/9218 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...