./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursive-simple/fibo_2calls_4-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f470102c 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_2calls_4-1.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 ffdaeeffc8c5fdb555812137dbba1199bd1a626d .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.25-f470102 [2019-11-28 17:29:16,286 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-28 17:29:16,292 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-28 17:29:16,310 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-28 17:29:16,311 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-28 17:29:16,314 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-28 17:29:16,315 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-28 17:29:16,320 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-28 17:29:16,324 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-28 17:29:16,326 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-28 17:29:16,335 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-28 17:29:16,337 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-28 17:29:16,337 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-28 17:29:16,338 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-28 17:29:16,343 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-28 17:29:16,344 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-28 17:29:16,346 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-28 17:29:16,350 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-28 17:29:16,354 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-28 17:29:16,356 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-28 17:29:16,359 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-28 17:29:16,363 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-28 17:29:16,367 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-28 17:29:16,368 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-28 17:29:16,371 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-28 17:29:16,371 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-28 17:29:16,372 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-28 17:29:16,373 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-28 17:29:16,373 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-28 17:29:16,374 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-28 17:29:16,375 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-28 17:29:16,376 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-28 17:29:16,377 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-28 17:29:16,377 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-28 17:29:16,378 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-28 17:29:16,379 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-28 17:29:16,379 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-28 17:29:16,380 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-28 17:29:16,380 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-28 17:29:16,381 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-28 17:29:16,382 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-28 17:29:16,383 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-28 17:29:16,399 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-28 17:29:16,399 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-28 17:29:16,401 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-28 17:29:16,401 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-28 17:29:16,402 INFO L138 SettingsManager]: * Use SBE=true [2019-11-28 17:29:16,402 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-28 17:29:16,402 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-28 17:29:16,402 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-28 17:29:16,403 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-28 17:29:16,403 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-28 17:29:16,403 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-28 17:29:16,404 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-28 17:29:16,404 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-28 17:29:16,404 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-28 17:29:16,404 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-28 17:29:16,405 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-28 17:29:16,405 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-28 17:29:16,405 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-28 17:29:16,406 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-28 17:29:16,406 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-28 17:29:16,406 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-28 17:29:16,407 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-28 17:29:16,407 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-28 17:29:16,407 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-28 17:29:16,408 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-28 17:29:16,408 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-28 17:29:16,408 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-28 17:29:16,408 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-28 17:29:16,409 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2019-11-28 17:29:16,409 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 -> ffdaeeffc8c5fdb555812137dbba1199bd1a626d [2019-11-28 17:29:16,744 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-28 17:29:16,766 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-28 17:29:16,770 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-28 17:29:16,772 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-28 17:29:16,774 INFO L275 PluginConnector]: CDTParser initialized [2019-11-28 17:29:16,775 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive-simple/fibo_2calls_4-1.c [2019-11-28 17:29:16,862 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d325655dc/ccb82d0092f54be8bfdf840f1f17fff1/FLAG2d289a65e [2019-11-28 17:29:17,439 INFO L306 CDTParser]: Found 1 translation units. [2019-11-28 17:29:17,440 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive-simple/fibo_2calls_4-1.c [2019-11-28 17:29:17,454 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d325655dc/ccb82d0092f54be8bfdf840f1f17fff1/FLAG2d289a65e [2019-11-28 17:29:17,770 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d325655dc/ccb82d0092f54be8bfdf840f1f17fff1 [2019-11-28 17:29:17,775 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-28 17:29:17,777 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-28 17:29:17,778 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-28 17:29:17,779 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-28 17:29:17,783 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-28 17:29:17,784 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 05:29:17" (1/1) ... [2019-11-28 17:29:17,788 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1192613d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:29:17, skipping insertion in model container [2019-11-28 17:29:17,788 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 05:29:17" (1/1) ... [2019-11-28 17:29:17,797 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-28 17:29:17,818 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-28 17:29:18,030 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-28 17:29:18,039 INFO L203 MainTranslator]: Completed pre-run [2019-11-28 17:29:18,059 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-28 17:29:18,072 INFO L208 MainTranslator]: Completed translation [2019-11-28 17:29:18,072 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:29:18 WrapperNode [2019-11-28 17:29:18,072 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-28 17:29:18,073 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-28 17:29:18,073 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-28 17:29:18,073 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-28 17:29:18,082 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:29:18" (1/1) ... [2019-11-28 17:29:18,088 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:29:18" (1/1) ... [2019-11-28 17:29:18,165 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-28 17:29:18,166 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-28 17:29:18,166 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-28 17:29:18,166 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-28 17:29:18,177 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:29:18" (1/1) ... [2019-11-28 17:29:18,178 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:29:18" (1/1) ... [2019-11-28 17:29:18,180 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:29:18" (1/1) ... [2019-11-28 17:29:18,180 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:29:18" (1/1) ... [2019-11-28 17:29:18,183 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:29:18" (1/1) ... [2019-11-28 17:29:18,186 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:29:18" (1/1) ... [2019-11-28 17:29:18,187 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:29:18" (1/1) ... [2019-11-28 17:29:18,189 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-28 17:29:18,190 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-28 17:29:18,190 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-28 17:29:18,190 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-28 17:29:18,191 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:29:18" (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 17:29:18,253 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-28 17:29:18,254 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-28 17:29:18,254 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2019-11-28 17:29:18,255 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2019-11-28 17:29:18,255 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2019-11-28 17:29:18,255 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2019-11-28 17:29:18,450 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-28 17:29:18,451 INFO L287 CfgBuilder]: Removed 4 assume(true) statements. [2019-11-28 17:29:18,452 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 05:29:18 BoogieIcfgContainer [2019-11-28 17:29:18,453 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-28 17:29:18,454 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-28 17:29:18,454 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-28 17:29:18,458 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-28 17:29:18,459 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 05:29:17" (1/3) ... [2019-11-28 17:29:18,460 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4da066d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 05:29:18, skipping insertion in model container [2019-11-28 17:29:18,460 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:29:18" (2/3) ... [2019-11-28 17:29:18,460 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4da066d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 05:29:18, skipping insertion in model container [2019-11-28 17:29:18,461 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 05:29:18" (3/3) ... [2019-11-28 17:29:18,463 INFO L109 eAbstractionObserver]: Analyzing ICFG fibo_2calls_4-1.c [2019-11-28 17:29:18,474 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-28 17:29:18,485 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-28 17:29:18,516 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-28 17:29:18,587 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-28 17:29:18,587 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-28 17:29:18,588 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-28 17:29:18,588 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-28 17:29:18,588 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-28 17:29:18,589 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-28 17:29:18,589 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-28 17:29:18,589 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-28 17:29:18,636 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states. [2019-11-28 17:29:18,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-11-28 17:29:18,643 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 17:29:18,645 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 17:29:18,645 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 17:29:18,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 17:29:18,652 INFO L82 PathProgramCache]: Analyzing trace with hash 1871295635, now seen corresponding path program 1 times [2019-11-28 17:29:18,659 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 17:29:18,660 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042823852] [2019-11-28 17:29:18,660 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 17:29:18,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:18,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:18,869 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 17:29:18,870 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042823852] [2019-11-28 17:29:18,874 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-28 17:29:18,874 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-28 17:29:18,877 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881727182] [2019-11-28 17:29:18,885 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-28 17:29:18,886 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 17:29:18,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-28 17:29:18,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-28 17:29:18,915 INFO L87 Difference]: Start difference. First operand 28 states. Second operand 5 states. [2019-11-28 17:29:19,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 17:29:19,080 INFO L93 Difference]: Finished difference Result 38 states and 47 transitions. [2019-11-28 17:29:19,081 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-28 17:29:19,082 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2019-11-28 17:29:19,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 17:29:19,096 INFO L225 Difference]: With dead ends: 38 [2019-11-28 17:29:19,097 INFO L226 Difference]: Without dead ends: 26 [2019-11-28 17:29:19,105 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 17:29:19,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-11-28 17:29:19,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2019-11-28 17:29:19,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-11-28 17:29:19,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 33 transitions. [2019-11-28 17:29:19,181 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 33 transitions. Word has length 9 [2019-11-28 17:29:19,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 17:29:19,182 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 33 transitions. [2019-11-28 17:29:19,182 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-28 17:29:19,183 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 33 transitions. [2019-11-28 17:29:19,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-28 17:29:19,185 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 17:29:19,185 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 17:29:19,186 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 17:29:19,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 17:29:19,187 INFO L82 PathProgramCache]: Analyzing trace with hash -1404217650, now seen corresponding path program 1 times [2019-11-28 17:29:19,187 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 17:29:19,188 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834651173] [2019-11-28 17:29:19,189 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 17:29:19,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:19,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:19,266 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 17:29:19,267 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834651173] [2019-11-28 17:29:19,267 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-28 17:29:19,267 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-28 17:29:19,268 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536506721] [2019-11-28 17:29:19,270 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-28 17:29:19,270 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 17:29:19,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-28 17:29:19,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-28 17:29:19,271 INFO L87 Difference]: Start difference. First operand 26 states and 33 transitions. Second operand 5 states. [2019-11-28 17:29:19,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 17:29:19,348 INFO L93 Difference]: Finished difference Result 32 states and 40 transitions. [2019-11-28 17:29:19,349 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-28 17:29:19,349 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2019-11-28 17:29:19,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 17:29:19,352 INFO L225 Difference]: With dead ends: 32 [2019-11-28 17:29:19,352 INFO L226 Difference]: Without dead ends: 28 [2019-11-28 17:29:19,353 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 17:29:19,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-11-28 17:29:19,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 26. [2019-11-28 17:29:19,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-11-28 17:29:19,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 33 transitions. [2019-11-28 17:29:19,368 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 33 transitions. Word has length 10 [2019-11-28 17:29:19,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 17:29:19,369 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 33 transitions. [2019-11-28 17:29:19,369 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-28 17:29:19,369 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 33 transitions. [2019-11-28 17:29:19,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-11-28 17:29:19,371 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 17:29:19,372 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 17:29:19,372 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 17:29:19,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 17:29:19,374 INFO L82 PathProgramCache]: Analyzing trace with hash -1629927371, now seen corresponding path program 1 times [2019-11-28 17:29:19,375 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 17:29:19,375 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654786258] [2019-11-28 17:29:19,376 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 17:29:19,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:19,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:19,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:19,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:19,599 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-28 17:29:19,600 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654786258] [2019-11-28 17:29:19,600 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1480162708] [2019-11-28 17:29:19,600 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 17:29:19,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:19,649 INFO L264 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-28 17:29:19,655 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 17:29:19,725 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-28 17:29:19,725 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 17:29:19,725 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2019-11-28 17:29:19,726 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153523764] [2019-11-28 17:29:19,727 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-28 17:29:19,728 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 17:29:19,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-28 17:29:19,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2019-11-28 17:29:19,729 INFO L87 Difference]: Start difference. First operand 26 states and 33 transitions. Second operand 10 states. [2019-11-28 17:29:19,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 17:29:19,917 INFO L93 Difference]: Finished difference Result 59 states and 83 transitions. [2019-11-28 17:29:19,918 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-28 17:29:19,918 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 22 [2019-11-28 17:29:19,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 17:29:19,920 INFO L225 Difference]: With dead ends: 59 [2019-11-28 17:29:19,920 INFO L226 Difference]: Without dead ends: 35 [2019-11-28 17:29:19,921 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2019-11-28 17:29:19,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-11-28 17:29:19,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 33. [2019-11-28 17:29:19,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-11-28 17:29:19,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 42 transitions. [2019-11-28 17:29:19,943 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 42 transitions. Word has length 22 [2019-11-28 17:29:19,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 17:29:19,944 INFO L462 AbstractCegarLoop]: Abstraction has 33 states and 42 transitions. [2019-11-28 17:29:19,944 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-28 17:29:19,944 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 42 transitions. [2019-11-28 17:29:19,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-11-28 17:29:19,948 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 17:29:19,949 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 17:29:20,152 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 17:29:20,155 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 17:29:20,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 17:29:20,156 INFO L82 PathProgramCache]: Analyzing trace with hash 1285987244, now seen corresponding path program 1 times [2019-11-28 17:29:20,156 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 17:29:20,157 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299699942] [2019-11-28 17:29:20,158 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 17:29:20,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:20,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:20,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:20,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:20,300 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-28 17:29:20,300 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299699942] [2019-11-28 17:29:20,301 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1675633100] [2019-11-28 17:29:20,301 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) [2019-11-28 17:29:20,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:20,343 INFO L264 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-28 17:29:20,346 INFO L287 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 17:29:20,376 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-28 17:29:20,377 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 17:29:20,377 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2019-11-28 17:29:20,377 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449687735] [2019-11-28 17:29:20,378 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-28 17:29:20,378 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 17:29:20,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-28 17:29:20,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2019-11-28 17:29:20,379 INFO L87 Difference]: Start difference. First operand 33 states and 42 transitions. Second operand 10 states. [2019-11-28 17:29:20,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 17:29:20,611 INFO L93 Difference]: Finished difference Result 55 states and 78 transitions. [2019-11-28 17:29:20,612 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-28 17:29:20,612 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 23 [2019-11-28 17:29:20,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 17:29:20,618 INFO L225 Difference]: With dead ends: 55 [2019-11-28 17:29:20,622 INFO L226 Difference]: Without dead ends: 51 [2019-11-28 17:29:20,623 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2019-11-28 17:29:20,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2019-11-28 17:29:20,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 48. [2019-11-28 17:29:20,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2019-11-28 17:29:20,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 68 transitions. [2019-11-28 17:29:20,656 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 68 transitions. Word has length 23 [2019-11-28 17:29:20,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 17:29:20,656 INFO L462 AbstractCegarLoop]: Abstraction has 48 states and 68 transitions. [2019-11-28 17:29:20,657 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-28 17:29:20,657 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 68 transitions. [2019-11-28 17:29:20,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2019-11-28 17:29:20,666 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 17:29:20,667 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 17:29:20,871 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 17:29:20,871 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 17:29:20,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 17:29:20,872 INFO L82 PathProgramCache]: Analyzing trace with hash -649262923, now seen corresponding path program 1 times [2019-11-28 17:29:20,873 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 17:29:20,874 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924022585] [2019-11-28 17:29:20,874 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 17:29:20,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:20,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:20,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:21,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:21,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:21,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:21,071 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-28 17:29:21,071 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924022585] [2019-11-28 17:29:21,072 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [496474450] [2019-11-28 17:29:21,072 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 17:29:21,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:21,115 INFO L264 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-28 17:29:21,117 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 17:29:21,176 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-28 17:29:21,176 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 17:29:21,177 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2019-11-28 17:29:21,177 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463812043] [2019-11-28 17:29:21,178 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-28 17:29:21,178 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 17:29:21,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-28 17:29:21,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2019-11-28 17:29:21,179 INFO L87 Difference]: Start difference. First operand 48 states and 68 transitions. Second operand 12 states. [2019-11-28 17:29:21,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 17:29:21,512 INFO L93 Difference]: Finished difference Result 114 states and 187 transitions. [2019-11-28 17:29:21,512 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-11-28 17:29:21,513 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 35 [2019-11-28 17:29:21,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 17:29:21,517 INFO L225 Difference]: With dead ends: 114 [2019-11-28 17:29:21,517 INFO L226 Difference]: Without dead ends: 68 [2019-11-28 17:29:21,519 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=78, Invalid=302, Unknown=0, NotChecked=0, Total=380 [2019-11-28 17:29:21,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2019-11-28 17:29:21,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 66. [2019-11-28 17:29:21,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2019-11-28 17:29:21,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 98 transitions. [2019-11-28 17:29:21,536 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 98 transitions. Word has length 35 [2019-11-28 17:29:21,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 17:29:21,537 INFO L462 AbstractCegarLoop]: Abstraction has 66 states and 98 transitions. [2019-11-28 17:29:21,537 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-28 17:29:21,537 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 98 transitions. [2019-11-28 17:29:21,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2019-11-28 17:29:21,540 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 17:29:21,540 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 17:29:21,749 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 17:29:21,751 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 17:29:21,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 17:29:21,751 INFO L82 PathProgramCache]: Analyzing trace with hash 2000747716, now seen corresponding path program 1 times [2019-11-28 17:29:21,752 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 17:29:21,752 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17400870] [2019-11-28 17:29:21,752 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 17:29:21,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:21,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:21,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:21,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:21,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:21,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:21,852 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-11-28 17:29:21,853 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17400870] [2019-11-28 17:29:21,853 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1129747087] [2019-11-28 17:29:21,854 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 17:29:21,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:21,889 INFO L264 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-28 17:29:21,892 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 17:29:21,963 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-28 17:29:21,963 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 17:29:21,963 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 12 [2019-11-28 17:29:21,964 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418285972] [2019-11-28 17:29:21,964 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-28 17:29:21,965 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 17:29:21,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-28 17:29:21,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2019-11-28 17:29:21,965 INFO L87 Difference]: Start difference. First operand 66 states and 98 transitions. Second operand 12 states. [2019-11-28 17:29:22,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 17:29:22,275 INFO L93 Difference]: Finished difference Result 147 states and 239 transitions. [2019-11-28 17:29:22,276 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-28 17:29:22,276 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 36 [2019-11-28 17:29:22,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 17:29:22,279 INFO L225 Difference]: With dead ends: 147 [2019-11-28 17:29:22,280 INFO L226 Difference]: Without dead ends: 83 [2019-11-28 17:29:22,282 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2019-11-28 17:29:22,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2019-11-28 17:29:22,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 66. [2019-11-28 17:29:22,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2019-11-28 17:29:22,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 96 transitions. [2019-11-28 17:29:22,297 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 96 transitions. Word has length 36 [2019-11-28 17:29:22,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 17:29:22,298 INFO L462 AbstractCegarLoop]: Abstraction has 66 states and 96 transitions. [2019-11-28 17:29:22,298 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-28 17:29:22,299 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 96 transitions. [2019-11-28 17:29:22,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2019-11-28 17:29:22,301 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 17:29:22,302 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 17:29:22,510 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 17:29:22,510 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 17:29:22,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 17:29:22,511 INFO L82 PathProgramCache]: Analyzing trace with hash -434541687, now seen corresponding path program 1 times [2019-11-28 17:29:22,511 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 17:29:22,511 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611316846] [2019-11-28 17:29:22,511 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 17:29:22,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:22,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:22,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:22,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:22,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:22,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:22,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:22,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:22,725 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2019-11-28 17:29:22,725 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611316846] [2019-11-28 17:29:22,726 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1061679048] [2019-11-28 17:29:22,726 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 17:29:22,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:22,775 INFO L264 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-28 17:29:22,782 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 17:29:22,846 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-11-28 17:29:22,846 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 17:29:22,847 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 15 [2019-11-28 17:29:22,847 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945853750] [2019-11-28 17:29:22,848 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-11-28 17:29:22,848 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 17:29:22,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-11-28 17:29:22,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2019-11-28 17:29:22,849 INFO L87 Difference]: Start difference. First operand 66 states and 96 transitions. Second operand 15 states. [2019-11-28 17:29:23,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 17:29:23,216 INFO L93 Difference]: Finished difference Result 163 states and 263 transitions. [2019-11-28 17:29:23,217 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-11-28 17:29:23,217 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 50 [2019-11-28 17:29:23,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 17:29:23,222 INFO L225 Difference]: With dead ends: 163 [2019-11-28 17:29:23,222 INFO L226 Difference]: Without dead ends: 99 [2019-11-28 17:29:23,223 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2019-11-28 17:29:23,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2019-11-28 17:29:23,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 91. [2019-11-28 17:29:23,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2019-11-28 17:29:23,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 143 transitions. [2019-11-28 17:29:23,240 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 143 transitions. Word has length 50 [2019-11-28 17:29:23,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 17:29:23,241 INFO L462 AbstractCegarLoop]: Abstraction has 91 states and 143 transitions. [2019-11-28 17:29:23,241 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-11-28 17:29:23,241 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 143 transitions. [2019-11-28 17:29:23,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2019-11-28 17:29:23,243 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 17:29:23,243 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 17:29:23,447 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 17:29:23,447 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 17:29:23,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 17:29:23,448 INFO L82 PathProgramCache]: Analyzing trace with hash -751947822, now seen corresponding path program 1 times [2019-11-28 17:29:23,449 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 17:29:23,449 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860201335] [2019-11-28 17:29:23,449 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 17:29:23,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:23,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:23,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:23,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:23,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:23,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:23,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:23,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:23,612 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 19 proven. 11 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-11-28 17:29:23,613 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860201335] [2019-11-28 17:29:23,613 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [722344432] [2019-11-28 17:29:23,613 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 17:29:23,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:23,657 INFO L264 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-28 17:29:23,660 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 17:29:23,703 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 18 proven. 5 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2019-11-28 17:29:23,703 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 17:29:23,703 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 7] total 15 [2019-11-28 17:29:23,704 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469662596] [2019-11-28 17:29:23,704 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-11-28 17:29:23,704 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 17:29:23,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-11-28 17:29:23,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2019-11-28 17:29:23,705 INFO L87 Difference]: Start difference. First operand 91 states and 143 transitions. Second operand 15 states. [2019-11-28 17:29:24,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 17:29:24,223 INFO L93 Difference]: Finished difference Result 182 states and 293 transitions. [2019-11-28 17:29:24,224 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-11-28 17:29:24,224 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 51 [2019-11-28 17:29:24,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 17:29:24,226 INFO L225 Difference]: With dead ends: 182 [2019-11-28 17:29:24,226 INFO L226 Difference]: Without dead ends: 91 [2019-11-28 17:29:24,228 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2019-11-28 17:29:24,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2019-11-28 17:29:24,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 83. [2019-11-28 17:29:24,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2019-11-28 17:29:24,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 123 transitions. [2019-11-28 17:29:24,260 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 123 transitions. Word has length 51 [2019-11-28 17:29:24,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 17:29:24,263 INFO L462 AbstractCegarLoop]: Abstraction has 83 states and 123 transitions. [2019-11-28 17:29:24,263 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-11-28 17:29:24,263 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 123 transitions. [2019-11-28 17:29:24,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2019-11-28 17:29:24,268 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 17:29:24,268 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 17:29:24,482 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 17:29:24,483 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 17:29:24,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 17:29:24,483 INFO L82 PathProgramCache]: Analyzing trace with hash -1674024370, now seen corresponding path program 2 times [2019-11-28 17:29:24,483 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 17:29:24,483 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616357288] [2019-11-28 17:29:24,483 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 17:29:24,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:24,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:24,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:24,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:24,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:24,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:24,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:24,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:24,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:24,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:24,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:24,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:24,738 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 36 proven. 41 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2019-11-28 17:29:24,738 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616357288] [2019-11-28 17:29:24,738 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1080121026] [2019-11-28 17:29:24,738 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 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 17:29:24,784 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-28 17:29:24,785 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-28 17:29:24,786 INFO L264 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-28 17:29:24,789 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 17:29:24,902 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 44 proven. 16 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2019-11-28 17:29:24,903 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 17:29:24,903 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 9] total 22 [2019-11-28 17:29:24,903 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064241821] [2019-11-28 17:29:24,904 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-11-28 17:29:24,904 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 17:29:24,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-11-28 17:29:24,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2019-11-28 17:29:24,905 INFO L87 Difference]: Start difference. First operand 83 states and 123 transitions. Second operand 22 states. [2019-11-28 17:29:25,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 17:29:25,582 INFO L93 Difference]: Finished difference Result 193 states and 345 transitions. [2019-11-28 17:29:25,582 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-11-28 17:29:25,583 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 77 [2019-11-28 17:29:25,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 17:29:25,585 INFO L225 Difference]: With dead ends: 193 [2019-11-28 17:29:25,585 INFO L226 Difference]: Without dead ends: 87 [2019-11-28 17:29:25,587 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=154, Invalid=838, Unknown=0, NotChecked=0, Total=992 [2019-11-28 17:29:25,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2019-11-28 17:29:25,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 77. [2019-11-28 17:29:25,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2019-11-28 17:29:25,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 98 transitions. [2019-11-28 17:29:25,599 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 98 transitions. Word has length 77 [2019-11-28 17:29:25,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 17:29:25,600 INFO L462 AbstractCegarLoop]: Abstraction has 77 states and 98 transitions. [2019-11-28 17:29:25,600 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-11-28 17:29:25,600 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 98 transitions. [2019-11-28 17:29:25,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2019-11-28 17:29:25,602 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 17:29:25,602 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 17:29:25,811 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 17:29:25,812 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 17:29:25,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 17:29:25,813 INFO L82 PathProgramCache]: Analyzing trace with hash -26046796, now seen corresponding path program 1 times [2019-11-28 17:29:25,813 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 17:29:25,814 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775844879] [2019-11-28 17:29:25,814 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 17:29:25,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:25,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:25,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:26,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:26,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:26,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:26,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:26,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:26,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:26,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:26,217 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2019-11-28 17:29:26,218 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775844879] [2019-11-28 17:29:26,219 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [43971123] [2019-11-28 17:29:26,219 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 17:29:26,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:26,275 INFO L264 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 39 conjunts are in the unsatisfiable core [2019-11-28 17:29:26,288 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 17:29:26,529 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2019-11-28 17:29:26,530 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 17:29:26,530 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 21 [2019-11-28 17:29:26,530 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804066106] [2019-11-28 17:29:26,531 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-11-28 17:29:26,531 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 17:29:26,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-11-28 17:29:26,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=373, Unknown=0, NotChecked=0, Total=420 [2019-11-28 17:29:26,532 INFO L87 Difference]: Start difference. First operand 77 states and 98 transitions. Second operand 21 states. [2019-11-28 17:29:26,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 17:29:26,663 INFO L93 Difference]: Finished difference Result 87 states and 108 transitions. [2019-11-28 17:29:26,664 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-11-28 17:29:26,664 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 64 [2019-11-28 17:29:26,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 17:29:26,666 INFO L225 Difference]: With dead ends: 87 [2019-11-28 17:29:26,666 INFO L226 Difference]: Without dead ends: 83 [2019-11-28 17:29:26,667 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 77 SyntacticMatches, 6 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=47, Invalid=373, Unknown=0, NotChecked=0, Total=420 [2019-11-28 17:29:26,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2019-11-28 17:29:26,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 72. [2019-11-28 17:29:26,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2019-11-28 17:29:26,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 92 transitions. [2019-11-28 17:29:26,676 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 92 transitions. Word has length 64 [2019-11-28 17:29:26,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 17:29:26,676 INFO L462 AbstractCegarLoop]: Abstraction has 72 states and 92 transitions. [2019-11-28 17:29:26,677 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-11-28 17:29:26,677 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 92 transitions. [2019-11-28 17:29:26,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2019-11-28 17:29:26,678 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 17:29:26,679 INFO L410 BasicCegarLoop]: trace histogram [7, 7, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 17:29:26,883 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 17:29:26,884 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 17:29:26,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 17:29:26,884 INFO L82 PathProgramCache]: Analyzing trace with hash 1985146669, now seen corresponding path program 1 times [2019-11-28 17:29:26,885 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 17:29:26,885 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699874573] [2019-11-28 17:29:26,886 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 17:29:26,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:26,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:26,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:26,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:26,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:27,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:27,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:27,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:27,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:27,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:27,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:27,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:27,082 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 39 proven. 38 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2019-11-28 17:29:27,083 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699874573] [2019-11-28 17:29:27,083 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [643162016] [2019-11-28 17:29:27,083 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 17:29:27,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:27,127 INFO L264 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-28 17:29:27,131 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 17:29:27,243 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 27 proven. 45 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2019-11-28 17:29:27,243 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 17:29:27,244 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 17 [2019-11-28 17:29:27,244 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209208752] [2019-11-28 17:29:27,245 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-11-28 17:29:27,246 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 17:29:27,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-11-28 17:29:27,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2019-11-28 17:29:27,246 INFO L87 Difference]: Start difference. First operand 72 states and 92 transitions. Second operand 17 states. [2019-11-28 17:29:27,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 17:29:27,426 INFO L93 Difference]: Finished difference Result 132 states and 176 transitions. [2019-11-28 17:29:27,426 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-28 17:29:27,426 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 78 [2019-11-28 17:29:27,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 17:29:27,427 INFO L225 Difference]: With dead ends: 132 [2019-11-28 17:29:27,427 INFO L226 Difference]: Without dead ends: 0 [2019-11-28 17:29:27,428 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 94 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2019-11-28 17:29:27,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-11-28 17:29:27,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-11-28 17:29:27,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-11-28 17:29:27,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-11-28 17:29:27,431 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 78 [2019-11-28 17:29:27,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 17:29:27,431 INFO L462 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-11-28 17:29:27,432 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-11-28 17:29:27,432 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-11-28 17:29:27,432 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-11-28 17:29:27,638 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 17:29:27,641 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2019-11-28 17:29:28,018 WARN L192 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 13 [2019-11-28 17:29:28,188 WARN L192 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 22 [2019-11-28 17:29:28,192 INFO L246 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2019-11-28 17:29:28,193 INFO L246 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2019-11-28 17:29:28,193 INFO L246 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2019-11-28 17:29:28,193 INFO L246 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 39) no Hoare annotation was computed. [2019-11-28 17:29:28,193 INFO L242 CegarLoopResult]: At program point L41(lines 35 42) the Hoare annotation is: (<= 4 ULTIMATE.start_main_~x~0) [2019-11-28 17:29:28,193 INFO L246 CegarLoopResult]: For program point L39(line 39) no Hoare annotation was computed. [2019-11-28 17:29:28,193 INFO L246 CegarLoopResult]: For program point L38(lines 38 40) no Hoare annotation was computed. [2019-11-28 17:29:28,194 INFO L242 CegarLoopResult]: At program point L37(line 37) the Hoare annotation is: (and (<= ULTIMATE.start_main_~x~0 4) (<= 4 ULTIMATE.start_main_~x~0)) [2019-11-28 17:29:28,194 INFO L246 CegarLoopResult]: For program point L37-1(line 37) no Hoare annotation was computed. [2019-11-28 17:29:28,194 INFO L246 CegarLoopResult]: For program point L38-2(lines 38 40) no Hoare annotation was computed. [2019-11-28 17:29:28,194 INFO L249 CegarLoopResult]: At program point fibo2ENTRY(lines 17 25) the Hoare annotation is: true [2019-11-28 17:29:28,194 INFO L242 CegarLoopResult]: At program point L23(line 23) the Hoare annotation is: (and (not (<= |fibo2_#in~n| 1)) (= fibo2_~n |fibo2_#in~n|)) [2019-11-28 17:29:28,194 INFO L246 CegarLoopResult]: For program point L23-1(line 23) no Hoare annotation was computed. [2019-11-28 17:29:28,194 INFO L242 CegarLoopResult]: At program point L23-2(line 23) the Hoare annotation is: (and (< 1 fibo2_~n) (or (and (<= 1 |fibo2_#t~ret2|) (<= |fibo2_#t~ret2| 1)) (<= 4 fibo2_~n)) (= fibo2_~n |fibo2_#in~n|)) [2019-11-28 17:29:28,195 INFO L246 CegarLoopResult]: For program point L20(lines 20 24) no Hoare annotation was computed. [2019-11-28 17:29:28,195 INFO L246 CegarLoopResult]: For program point L23-3(line 23) no Hoare annotation was computed. [2019-11-28 17:29:28,195 INFO L246 CegarLoopResult]: For program point L18(lines 18 24) no Hoare annotation was computed. [2019-11-28 17:29:28,195 INFO L246 CegarLoopResult]: For program point fibo2FINAL(lines 17 25) no Hoare annotation was computed. [2019-11-28 17:29:28,195 INFO L246 CegarLoopResult]: For program point fibo2EXIT(lines 17 25) no Hoare annotation was computed. [2019-11-28 17:29:28,195 INFO L249 CegarLoopResult]: At program point fibo1ENTRY(lines 7 15) the Hoare annotation is: true [2019-11-28 17:29:28,195 INFO L242 CegarLoopResult]: At program point L13(line 13) the Hoare annotation is: (and (not (<= |fibo1_#in~n| 2)) (= fibo1_~n |fibo1_#in~n|)) [2019-11-28 17:29:28,196 INFO L246 CegarLoopResult]: For program point L13-1(line 13) no Hoare annotation was computed. [2019-11-28 17:29:28,196 INFO L242 CegarLoopResult]: At program point L13-2(line 13) the Hoare annotation is: (and (or (and (<= 1 |fibo1_#t~ret0|) (<= |fibo1_#in~n| 3) (<= |fibo1_#t~ret0| 1)) (and (<= 2 |fibo1_#t~ret0|) (<= |fibo1_#t~ret0| 2) (<= 4 fibo1_~n)) (<= 5 |fibo1_#in~n|)) (not (<= |fibo1_#in~n| 2)) (= fibo1_~n |fibo1_#in~n|)) [2019-11-28 17:29:28,196 INFO L246 CegarLoopResult]: For program point fibo1FINAL(lines 7 15) no Hoare annotation was computed. [2019-11-28 17:29:28,196 INFO L246 CegarLoopResult]: For program point L10(lines 10 14) no Hoare annotation was computed. [2019-11-28 17:29:28,196 INFO L246 CegarLoopResult]: For program point L13-3(line 13) no Hoare annotation was computed. [2019-11-28 17:29:28,196 INFO L246 CegarLoopResult]: For program point L8(lines 8 14) no Hoare annotation was computed. [2019-11-28 17:29:28,196 INFO L246 CegarLoopResult]: For program point fibo1EXIT(lines 7 15) no Hoare annotation was computed. [2019-11-28 17:29:28,216 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 05:29:28 BoogieIcfgContainer [2019-11-28 17:29:28,216 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-28 17:29:28,217 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-28 17:29:28,217 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-28 17:29:28,217 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-28 17:29:28,218 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 05:29:18" (3/4) ... [2019-11-28 17:29:28,222 INFO L137 WitnessPrinter]: Generating witness for correct program [2019-11-28 17:29:28,230 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure fibo2 [2019-11-28 17:29:28,230 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure fibo1 [2019-11-28 17:29:28,239 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2019-11-28 17:29:28,239 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2019-11-28 17:29:28,291 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2019-11-28 17:29:28,291 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-28 17:29:28,293 INFO L168 Benchmark]: Toolchain (without parser) took 10516.70 ms. Allocated memory was 1.0 GB in the beginning and 1.3 GB in the end (delta: 277.3 MB). Free memory was 961.7 MB in the beginning and 925.3 MB in the end (delta: 36.5 MB). Peak memory consumption was 313.8 MB. Max. memory is 11.5 GB. [2019-11-28 17:29:28,294 INFO L168 Benchmark]: CDTParser took 1.06 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 17:29:28,294 INFO L168 Benchmark]: CACSL2BoogieTranslator took 294.21 ms. Allocated memory is still 1.0 GB. Free memory was 961.7 MB in the beginning and 951.0 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2019-11-28 17:29:28,295 INFO L168 Benchmark]: Boogie Procedure Inliner took 92.42 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 125.8 MB). Free memory was 951.0 MB in the beginning and 1.1 GB in the end (delta: -171.3 MB). Peak memory consumption was 9.8 MB. Max. memory is 11.5 GB. [2019-11-28 17:29:28,295 INFO L168 Benchmark]: Boogie Preprocessor took 23.46 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 6.6 MB). Peak memory consumption was 6.6 MB. Max. memory is 11.5 GB. [2019-11-28 17:29:28,296 INFO L168 Benchmark]: RCFGBuilder took 263.04 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 11.9 MB). Peak memory consumption was 11.9 MB. Max. memory is 11.5 GB. [2019-11-28 17:29:28,297 INFO L168 Benchmark]: TraceAbstraction took 9762.34 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 151.5 MB). Free memory was 1.1 GB in the beginning and 925.3 MB in the end (delta: 178.5 MB). Peak memory consumption was 330.0 MB. Max. memory is 11.5 GB. [2019-11-28 17:29:28,297 INFO L168 Benchmark]: Witness Printer took 74.46 ms. Allocated memory is still 1.3 GB. Free memory was 925.3 MB in the beginning and 925.3 MB in the end (delta: 24 B). Peak memory consumption was 24 B. Max. memory is 11.5 GB. [2019-11-28 17:29:28,301 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.06 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 294.21 ms. Allocated memory is still 1.0 GB. Free memory was 961.7 MB in the beginning and 951.0 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 92.42 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 125.8 MB). Free memory was 951.0 MB in the beginning and 1.1 GB in the end (delta: -171.3 MB). Peak memory consumption was 9.8 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 23.46 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 6.6 MB). Peak memory consumption was 6.6 MB. Max. memory is 11.5 GB. * RCFGBuilder took 263.04 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 11.9 MB). Peak memory consumption was 11.9 MB. Max. memory is 11.5 GB. * TraceAbstraction took 9762.34 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 151.5 MB). Free memory was 1.1 GB in the beginning and 925.3 MB in the end (delta: 178.5 MB). Peak memory consumption was 330.0 MB. Max. memory is 11.5 GB. * Witness Printer took 74.46 ms. Allocated memory is still 1.3 GB. Free memory was 925.3 MB in the beginning and 925.3 MB in the end (delta: 24 B). Peak memory consumption was 24 B. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 39]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 35]: Loop Invariant Derived loop invariant: 4 <= x - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 28 locations, 1 error locations. Result: SAFE, OverallTime: 9.0s, OverallIterations: 11, TraceHistogramMax: 7, AutomataDifference: 3.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.5s, HoareTripleCheckerStatistics: 275 SDtfs, 393 SDslu, 1861 SDs, 0 SdLazy, 2368 SolverSat, 317 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 706 GetRequests, 537 SyntacticMatches, 7 SemanticMatches, 162 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 482 ImplicationChecksByTransitivity, 2.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=91occurred in iteration=7, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 11 MinimizatonAttempts, 63 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 311 PreInvPairs, 397 NumberOfFragments, 78 HoareAnnotationTreeSize, 311 FomulaSimplifications, 1143 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 8 FomulaSimplificationsInter, 1164 FormulaSimplificationTreeSizeReductionInter, 0.3s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 2.7s InterpolantComputationTime, 891 NumberOfCodeBlocks, 891 NumberOfCodeBlocksAsserted, 21 NumberOfCheckSat, 871 ConstructedInterpolants, 0 QuantifiedInterpolants, 114027 SizeOfPredicates, 31 NumberOfNonLiveVariables, 986 ConjunctsInSsa, 101 ConjunctsInUnsatCore, 20 InterpolantComputations, 2 PerfectInterpolantSequences, 686/962 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...