java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive-simple/fibo_10-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-112bae1 [2019-09-08 06:12:59,632 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-08 06:12:59,635 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-08 06:12:59,646 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-09-08 06:12:59,647 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-09-08 06:12:59,648 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-09-08 06:12:59,650 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-09-08 06:12:59,652 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-09-08 06:12:59,654 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-09-08 06:12:59,655 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-09-08 06:12:59,656 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-09-08 06:12:59,657 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-09-08 06:12:59,658 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-08 06:12:59,659 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-08 06:12:59,660 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-08 06:12:59,661 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-08 06:12:59,662 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-08 06:12:59,663 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-08 06:12:59,665 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-08 06:12:59,668 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-08 06:12:59,670 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-08 06:12:59,671 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-08 06:12:59,672 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-08 06:12:59,673 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-08 06:12:59,676 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-09-08 06:12:59,685 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-08 06:12:59,686 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-08 06:12:59,687 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-08 06:12:59,688 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-09-08 06:12:59,713 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-08 06:12:59,713 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-08 06:12:59,716 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-09-08 06:12:59,716 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-09-08 06:12:59,717 INFO L138 SettingsManager]: * Use SBE=true [2019-09-08 06:12:59,717 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-08 06:12:59,718 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-08 06:12:59,718 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-09-08 06:12:59,718 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-08 06:12:59,719 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-08 06:12:59,719 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-08 06:12:59,719 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-08 06:12:59,719 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-08 06:12:59,719 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-08 06:12:59,720 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-08 06:12:59,720 INFO L138 SettingsManager]: * Use constant arrays=true [2019-09-08 06:12:59,720 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-08 06:12:59,721 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-08 06:12:59,722 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-08 06:12:59,722 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-09-08 06:12:59,722 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-09-08 06:12:59,722 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-08 06:12:59,723 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-08 06:12:59,723 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-08 06:12:59,724 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-09-08 06:12:59,724 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-09-08 06:12:59,724 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-08 06:12:59,724 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-08 06:12:59,724 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-09-08 06:12:59,779 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-08 06:12:59,799 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-08 06:12:59,802 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-08 06:12:59,804 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-08 06:12:59,804 INFO L275 PluginConnector]: CDTParser initialized [2019-09-08 06:12:59,805 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/fibo_10-2.c [2019-09-08 06:12:59,881 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2b0c5eedf/023b2cb0f6274cde9c0c007c21217e03/FLAG7d9801f40 [2019-09-08 06:13:00,351 INFO L306 CDTParser]: Found 1 translation units. [2019-09-08 06:13:00,353 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/fibo_10-2.c [2019-09-08 06:13:00,360 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2b0c5eedf/023b2cb0f6274cde9c0c007c21217e03/FLAG7d9801f40 [2019-09-08 06:13:00,718 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2b0c5eedf/023b2cb0f6274cde9c0c007c21217e03 [2019-09-08 06:13:00,731 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-08 06:13:00,733 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-08 06:13:00,734 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-08 06:13:00,735 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-08 06:13:00,738 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-08 06:13:00,739 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.09 06:13:00" (1/1) ... [2019-09-08 06:13:00,742 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6c8c6ab1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 06:13:00, skipping insertion in model container [2019-09-08 06:13:00,743 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.09 06:13:00" (1/1) ... [2019-09-08 06:13:00,750 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-08 06:13:00,768 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-08 06:13:00,940 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-08 06:13:00,944 INFO L188 MainTranslator]: Completed pre-run [2019-09-08 06:13:00,961 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-08 06:13:00,975 INFO L192 MainTranslator]: Completed translation [2019-09-08 06:13:00,976 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 06:13:00 WrapperNode [2019-09-08 06:13:00,976 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-08 06:13:00,977 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-08 06:13:00,977 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-08 06:13:00,977 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-08 06:13:00,988 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 06:13:00" (1/1) ... [2019-09-08 06:13:00,988 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 06:13:00" (1/1) ... [2019-09-08 06:13:01,063 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 06:13:00" (1/1) ... [2019-09-08 06:13:01,063 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 06:13:00" (1/1) ... [2019-09-08 06:13:01,067 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 06:13:00" (1/1) ... [2019-09-08 06:13:01,070 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 06:13:00" (1/1) ... [2019-09-08 06:13:01,071 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 06:13:00" (1/1) ... [2019-09-08 06:13:01,072 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-08 06:13:01,073 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-08 06:13:01,073 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-08 06:13:01,073 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-08 06:13:01,074 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 06:13:00" (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 [2019-09-08 06:13:01,127 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-08 06:13:01,127 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-08 06:13:01,127 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo [2019-09-08 06:13:01,127 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-08 06:13:01,128 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-08 06:13:01,128 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-08 06:13:01,128 INFO L130 BoogieDeclarations]: Found specification of procedure fibo [2019-09-08 06:13:01,129 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-08 06:13:01,129 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-08 06:13:01,129 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-08 06:13:01,311 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-08 06:13:01,311 INFO L283 CfgBuilder]: Removed 0 assume(true) statements. [2019-09-08 06:13:01,314 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.09 06:13:01 BoogieIcfgContainer [2019-09-08 06:13:01,315 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-08 06:13:01,316 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-08 06:13:01,316 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-08 06:13:01,320 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-08 06:13:01,320 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.09 06:13:00" (1/3) ... [2019-09-08 06:13:01,321 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@521bc7ea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.09 06:13:01, skipping insertion in model container [2019-09-08 06:13:01,321 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 06:13:00" (2/3) ... [2019-09-08 06:13:01,322 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@521bc7ea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.09 06:13:01, skipping insertion in model container [2019-09-08 06:13:01,322 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.09 06:13:01" (3/3) ... [2019-09-08 06:13:01,324 INFO L109 eAbstractionObserver]: Analyzing ICFG fibo_10-2.c [2019-09-08 06:13:01,337 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-08 06:13:01,350 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-08 06:13:01,377 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-08 06:13:01,433 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2019-09-08 06:13:01,434 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-08 06:13:01,434 INFO L378 AbstractCegarLoop]: Hoare is true [2019-09-08 06:13:01,434 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-08 06:13:01,434 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-08 06:13:01,435 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-08 06:13:01,435 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-08 06:13:01,435 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-08 06:13:01,435 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-08 06:13:01,458 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2019-09-08 06:13:01,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-09-08 06:13:01,465 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:13:01,466 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:13:01,468 INFO L418 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:13:01,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:13:01,472 INFO L82 PathProgramCache]: Analyzing trace with hash 537028541, now seen corresponding path program 1 times [2019-09-08 06:13:01,474 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:13:01,474 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:13:01,515 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:13:01,515 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 06:13:01,515 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:13:01,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:13:01,649 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 06:13:01,652 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-08 06:13:01,652 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-09-08 06:13:01,656 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-08 06:13:01,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-08 06:13:01,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-09-08 06:13:01,670 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 5 states. [2019-09-08 06:13:01,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:13:01,777 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2019-09-08 06:13:01,777 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-09-08 06:13:01,779 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2019-09-08 06:13:01,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:13:01,788 INFO L225 Difference]: With dead ends: 35 [2019-09-08 06:13:01,788 INFO L226 Difference]: Without dead ends: 21 [2019-09-08 06:13:01,791 INFO L628 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 [2019-09-08 06:13:01,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2019-09-08 06:13:01,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2019-09-08 06:13:01,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-09-08 06:13:01,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2019-09-08 06:13:01,832 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 13 [2019-09-08 06:13:01,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:13:01,834 INFO L475 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2019-09-08 06:13:01,834 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-08 06:13:01,834 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2019-09-08 06:13:01,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-09-08 06:13:01,836 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:13:01,836 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:13:01,837 INFO L418 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:13:01,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:13:01,837 INFO L82 PathProgramCache]: Analyzing trace with hash 179123823, now seen corresponding path program 1 times [2019-09-08 06:13:01,838 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:13:01,838 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:13:01,839 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:13:01,839 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 06:13:01,839 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:13:01,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:13:01,882 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 06:13:01,882 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-08 06:13:01,883 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-09-08 06:13:01,884 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-08 06:13:01,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-08 06:13:01,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-09-08 06:13:01,886 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 5 states. [2019-09-08 06:13:01,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:13:01,953 INFO L93 Difference]: Finished difference Result 27 states and 32 transitions. [2019-09-08 06:13:01,954 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-09-08 06:13:01,954 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2019-09-08 06:13:01,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:13:01,956 INFO L225 Difference]: With dead ends: 27 [2019-09-08 06:13:01,956 INFO L226 Difference]: Without dead ends: 23 [2019-09-08 06:13:01,957 INFO L628 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 [2019-09-08 06:13:01,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2019-09-08 06:13:01,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 21. [2019-09-08 06:13:01,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-09-08 06:13:01,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2019-09-08 06:13:01,966 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 14 [2019-09-08 06:13:01,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:13:01,966 INFO L475 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2019-09-08 06:13:01,967 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-08 06:13:01,967 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2019-09-08 06:13:01,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-09-08 06:13:01,968 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:13:01,969 INFO L399 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:13:01,969 INFO L418 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:13:01,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:13:01,969 INFO L82 PathProgramCache]: Analyzing trace with hash 806022394, now seen corresponding path program 1 times [2019-09-08 06:13:01,970 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:13:01,970 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:13:01,971 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:13:01,971 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 06:13:01,972 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:13:01,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:13:02,102 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-09-08 06:13:02,105 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:13:02,105 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-08 06:13:02,125 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:13:02,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:13:02,157 INFO L256 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 6 conjunts are in the unsatisfiable core [2019-09-08 06:13:02,164 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:13:02,240 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-09-08 06:13:02,245 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:13:02,245 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2019-09-08 06:13:02,246 INFO L454 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-09-08 06:13:02,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-09-08 06:13:02,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2019-09-08 06:13:02,247 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 8 states. [2019-09-08 06:13:02,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:13:02,389 INFO L93 Difference]: Finished difference Result 38 states and 49 transitions. [2019-09-08 06:13:02,389 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-09-08 06:13:02,390 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 26 [2019-09-08 06:13:02,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:13:02,391 INFO L225 Difference]: With dead ends: 38 [2019-09-08 06:13:02,391 INFO L226 Difference]: Without dead ends: 23 [2019-09-08 06:13:02,392 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2019-09-08 06:13:02,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2019-09-08 06:13:02,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2019-09-08 06:13:02,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-09-08 06:13:02,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2019-09-08 06:13:02,402 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 26 [2019-09-08 06:13:02,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:13:02,402 INFO L475 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2019-09-08 06:13:02,403 INFO L476 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-09-08 06:13:02,403 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2019-09-08 06:13:02,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-09-08 06:13:02,404 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:13:02,405 INFO L399 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:13:02,406 INFO L418 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:13:02,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:13:02,407 INFO L82 PathProgramCache]: Analyzing trace with hash -983862936, now seen corresponding path program 1 times [2019-09-08 06:13:02,407 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:13:02,408 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:13:02,409 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:13:02,409 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 06:13:02,409 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:13:02,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:13:02,492 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-09-08 06:13:02,493 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:13:02,493 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-08 06:13:02,510 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:13:02,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:13:02,525 INFO L256 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 6 conjunts are in the unsatisfiable core [2019-09-08 06:13:02,527 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:13:02,540 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (3)] Exception during sending of exit command (exit): Broken pipe [2019-09-08 06:13:02,553 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:13:02,553 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2019-09-08 06:13:02,554 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-08 06:13:02,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-08 06:13:02,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-09-08 06:13:02,555 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand 6 states. [2019-09-08 06:13:02,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:13:02,644 INFO L93 Difference]: Finished difference Result 32 states and 41 transitions. [2019-09-08 06:13:02,644 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-09-08 06:13:02,644 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 27 [2019-09-08 06:13:02,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:13:02,646 INFO L225 Difference]: With dead ends: 32 [2019-09-08 06:13:02,647 INFO L226 Difference]: Without dead ends: 28 [2019-09-08 06:13:02,647 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2019-09-08 06:13:02,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-09-08 06:13:02,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2019-09-08 06:13:02,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-09-08 06:13:02,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 37 transitions. [2019-09-08 06:13:02,673 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 37 transitions. Word has length 27 [2019-09-08 06:13:02,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:13:02,676 INFO L475 AbstractCegarLoop]: Abstraction has 28 states and 37 transitions. [2019-09-08 06:13:02,676 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-08 06:13:02,676 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 37 transitions. [2019-09-08 06:13:02,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2019-09-08 06:13:02,681 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:13:02,681 INFO L399 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:13:02,681 INFO L418 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:13:02,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:13:02,682 INFO L82 PathProgramCache]: Analyzing trace with hash 146085807, now seen corresponding path program 2 times [2019-09-08 06:13:02,682 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:13:02,682 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:13:02,685 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:13:02,686 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 06:13:02,686 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:13:02,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:13:02,855 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 23 proven. 8 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-09-08 06:13:02,856 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:13:02,856 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-08 06:13:02,870 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:13:02,893 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-08 06:13:02,893 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:13:02,894 INFO L256 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 8 conjunts are in the unsatisfiable core [2019-09-08 06:13:02,896 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:13:02,961 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-09-08 06:13:02,965 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:13:02,965 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 13 [2019-09-08 06:13:02,966 INFO L454 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-09-08 06:13:02,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-09-08 06:13:02,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2019-09-08 06:13:02,967 INFO L87 Difference]: Start difference. First operand 28 states and 37 transitions. Second operand 13 states. [2019-09-08 06:13:03,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:13:03,344 INFO L93 Difference]: Finished difference Result 66 states and 99 transitions. [2019-09-08 06:13:03,345 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-09-08 06:13:03,346 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 40 [2019-09-08 06:13:03,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:13:03,347 INFO L225 Difference]: With dead ends: 66 [2019-09-08 06:13:03,347 INFO L226 Difference]: Without dead ends: 44 [2019-09-08 06:13:03,350 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=131, Invalid=375, Unknown=0, NotChecked=0, Total=506 [2019-09-08 06:13:03,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2019-09-08 06:13:03,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 42. [2019-09-08 06:13:03,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-09-08 06:13:03,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 51 transitions. [2019-09-08 06:13:03,370 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 51 transitions. Word has length 40 [2019-09-08 06:13:03,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:13:03,370 INFO L475 AbstractCegarLoop]: Abstraction has 42 states and 51 transitions. [2019-09-08 06:13:03,370 INFO L476 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-09-08 06:13:03,371 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 51 transitions. [2019-09-08 06:13:03,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2019-09-08 06:13:03,375 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:13:03,376 INFO L399 BasicCegarLoop]: trace histogram [9, 9, 7, 4, 4, 4, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:13:03,376 INFO L418 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:13:03,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:13:03,379 INFO L82 PathProgramCache]: Analyzing trace with hash 2001184551, now seen corresponding path program 3 times [2019-09-08 06:13:03,379 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:13:03,379 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:13:03,380 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:13:03,381 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:13:03,381 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:13:03,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:13:03,522 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 66 proven. 25 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2019-09-08 06:13:03,522 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:13:03,523 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:13:03,541 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-08 06:13:03,565 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2019-09-08 06:13:03,565 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:13:03,571 INFO L256 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 8 conjunts are in the unsatisfiable core [2019-09-08 06:13:03,575 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:13:03,601 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 66 proven. 25 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (5)] Exception during sending of exit command (exit): Stream closed [2019-09-08 06:13:03,606 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:13:03,606 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2019-09-08 06:13:03,606 INFO L454 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-09-08 06:13:03,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-09-08 06:13:03,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2019-09-08 06:13:03,610 INFO L87 Difference]: Start difference. First operand 42 states and 51 transitions. Second operand 7 states. [2019-09-08 06:13:03,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:13:03,705 INFO L93 Difference]: Finished difference Result 49 states and 59 transitions. [2019-09-08 06:13:03,706 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-08 06:13:03,706 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 68 [2019-09-08 06:13:03,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:13:03,709 INFO L225 Difference]: With dead ends: 49 [2019-09-08 06:13:03,709 INFO L226 Difference]: Without dead ends: 45 [2019-09-08 06:13:03,710 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2019-09-08 06:13:03,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2019-09-08 06:13:03,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 42. [2019-09-08 06:13:03,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-09-08 06:13:03,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 51 transitions. [2019-09-08 06:13:03,727 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 51 transitions. Word has length 68 [2019-09-08 06:13:03,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:13:03,728 INFO L475 AbstractCegarLoop]: Abstraction has 42 states and 51 transitions. [2019-09-08 06:13:03,728 INFO L476 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-09-08 06:13:03,728 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 51 transitions. [2019-09-08 06:13:03,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2019-09-08 06:13:03,733 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:13:03,733 INFO L399 BasicCegarLoop]: trace histogram [13, 13, 11, 6, 6, 6, 6, 6, 6, 6, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:13:03,734 INFO L418 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:13:03,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:13:03,735 INFO L82 PathProgramCache]: Analyzing trace with hash 1474757101, now seen corresponding path program 4 times [2019-09-08 06:13:03,735 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:13:03,735 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:13:03,736 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:13:03,736 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:13:03,736 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:13:03,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:13:03,882 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 46 proven. 109 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked. [2019-09-08 06:13:03,883 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:13:03,883 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-08 06:13:03,896 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:13:03,926 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-08 06:13:03,927 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:13:03,927 INFO L256 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 10 conjunts are in the unsatisfiable core [2019-09-08 06:13:03,932 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:13:03,967 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 27 proven. 166 refuted. 0 times theorem prover too weak. 234 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (6)] Exception during sending of exit command (exit): Broken pipe [2019-09-08 06:13:03,971 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:13:03,972 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 8 [2019-09-08 06:13:03,972 INFO L454 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-09-08 06:13:03,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-09-08 06:13:03,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-09-08 06:13:03,973 INFO L87 Difference]: Start difference. First operand 42 states and 51 transitions. Second operand 8 states. [2019-09-08 06:13:04,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:13:04,097 INFO L93 Difference]: Finished difference Result 54 states and 71 transitions. [2019-09-08 06:13:04,098 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-09-08 06:13:04,098 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 96 [2019-09-08 06:13:04,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:13:04,100 INFO L225 Difference]: With dead ends: 54 [2019-09-08 06:13:04,100 INFO L226 Difference]: Without dead ends: 50 [2019-09-08 06:13:04,101 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2019-09-08 06:13:04,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2019-09-08 06:13:04,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 47. [2019-09-08 06:13:04,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2019-09-08 06:13:04,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 62 transitions. [2019-09-08 06:13:04,111 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 62 transitions. Word has length 96 [2019-09-08 06:13:04,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:13:04,111 INFO L475 AbstractCegarLoop]: Abstraction has 47 states and 62 transitions. [2019-09-08 06:13:04,111 INFO L476 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-09-08 06:13:04,112 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 62 transitions. [2019-09-08 06:13:04,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2019-09-08 06:13:04,114 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:13:04,115 INFO L399 BasicCegarLoop]: trace histogram [29, 29, 25, 14, 14, 14, 14, 14, 14, 14, 11, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:13:04,115 INFO L418 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:13:04,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:13:04,116 INFO L82 PathProgramCache]: Analyzing trace with hash -1167774577, now seen corresponding path program 5 times [2019-09-08 06:13:04,116 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:13:04,116 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:13:04,117 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:13:04,117 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:13:04,117 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:13:04,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:13:04,282 INFO L134 CoverageAnalysis]: Checked inductivity of 2288 backedges. 91 proven. 567 refuted. 0 times theorem prover too weak. 1630 trivial. 0 not checked. [2019-09-08 06:13:04,282 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:13:04,282 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-08 06:13:04,298 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:13:04,345 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2019-09-08 06:13:04,346 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:13:04,347 INFO L256 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 10 conjunts are in the unsatisfiable core [2019-09-08 06:13:04,364 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:13:04,489 INFO L134 CoverageAnalysis]: Checked inductivity of 2288 backedges. 1311 proven. 33 refuted. 0 times theorem prover too weak. 944 trivial. 0 not checked. [2019-09-08 06:13:04,494 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:13:04,494 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2019-09-08 06:13:04,495 INFO L454 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-09-08 06:13:04,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-09-08 06:13:04,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2019-09-08 06:13:04,497 INFO L87 Difference]: Start difference. First operand 47 states and 62 transitions. Second operand 14 states. [2019-09-08 06:13:04,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:13:04,994 INFO L93 Difference]: Finished difference Result 110 states and 189 transitions. [2019-09-08 06:13:04,995 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-09-08 06:13:04,995 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 206 [2019-09-08 06:13:04,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:13:04,998 INFO L225 Difference]: With dead ends: 110 [2019-09-08 06:13:04,998 INFO L226 Difference]: Without dead ends: 69 [2019-09-08 06:13:05,001 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 206 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=210, Invalid=660, Unknown=0, NotChecked=0, Total=870 [2019-09-08 06:13:05,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2019-09-08 06:13:05,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 66. [2019-09-08 06:13:05,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2019-09-08 06:13:05,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 82 transitions. [2019-09-08 06:13:05,012 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 82 transitions. Word has length 206 [2019-09-08 06:13:05,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:13:05,013 INFO L475 AbstractCegarLoop]: Abstraction has 66 states and 82 transitions. [2019-09-08 06:13:05,013 INFO L476 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-09-08 06:13:05,013 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 82 transitions. [2019-09-08 06:13:05,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2019-09-08 06:13:05,016 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:13:05,016 INFO L399 BasicCegarLoop]: trace histogram [25, 25, 20, 12, 12, 12, 12, 12, 12, 12, 8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:13:05,016 INFO L418 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:13:05,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:13:05,017 INFO L82 PathProgramCache]: Analyzing trace with hash 259499213, now seen corresponding path program 6 times [2019-09-08 06:13:05,017 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:13:05,017 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:13:05,018 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:13:05,018 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:13:05,018 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:13:05,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:13:05,149 INFO L134 CoverageAnalysis]: Checked inductivity of 1654 backedges. 152 proven. 389 refuted. 0 times theorem prover too weak. 1113 trivial. 0 not checked. [2019-09-08 06:13:05,149 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:13:05,149 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-08 06:13:05,162 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:13:05,227 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2019-09-08 06:13:05,227 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:13:05,228 INFO L256 TraceCheckSpWp]: Trace formula consists of 394 conjuncts, 10 conjunts are in the unsatisfiable core [2019-09-08 06:13:05,233 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:13:05,289 INFO L134 CoverageAnalysis]: Checked inductivity of 1654 backedges. 202 proven. 241 refuted. 0 times theorem prover too weak. 1211 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (8)] Exception during sending of exit command (exit): Broken pipe [2019-09-08 06:13:05,294 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:13:05,294 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 10 [2019-09-08 06:13:05,295 INFO L454 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-09-08 06:13:05,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-09-08 06:13:05,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2019-09-08 06:13:05,295 INFO L87 Difference]: Start difference. First operand 66 states and 82 transitions. Second operand 10 states. [2019-09-08 06:13:05,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:13:05,505 INFO L93 Difference]: Finished difference Result 75 states and 99 transitions. [2019-09-08 06:13:05,505 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-09-08 06:13:05,505 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 177 [2019-09-08 06:13:05,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:13:05,507 INFO L225 Difference]: With dead ends: 75 [2019-09-08 06:13:05,508 INFO L226 Difference]: Without dead ends: 71 [2019-09-08 06:13:05,508 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2019-09-08 06:13:05,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2019-09-08 06:13:05,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2019-09-08 06:13:05,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2019-09-08 06:13:05,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 94 transitions. [2019-09-08 06:13:05,519 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 94 transitions. Word has length 177 [2019-09-08 06:13:05,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:13:05,520 INFO L475 AbstractCegarLoop]: Abstraction has 71 states and 94 transitions. [2019-09-08 06:13:05,520 INFO L476 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-09-08 06:13:05,520 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 94 transitions. [2019-09-08 06:13:05,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 355 [2019-09-08 06:13:05,526 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:13:05,526 INFO L399 BasicCegarLoop]: trace histogram [51, 51, 41, 25, 25, 25, 25, 25, 25, 25, 16, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:13:05,526 INFO L418 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:13:05,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:13:05,527 INFO L82 PathProgramCache]: Analyzing trace with hash 223191898, now seen corresponding path program 7 times [2019-09-08 06:13:05,527 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:13:05,527 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:13:05,528 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:13:05,528 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:13:05,528 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:13:05,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:13:05,769 INFO L134 CoverageAnalysis]: Checked inductivity of 7120 backedges. 214 proven. 1491 refuted. 0 times theorem prover too weak. 5415 trivial. 0 not checked. [2019-09-08 06:13:05,769 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:13:05,770 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:13:05,785 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 06:13:05,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:13:05,890 INFO L256 TraceCheckSpWp]: Trace formula consists of 787 conjuncts, 16 conjunts are in the unsatisfiable core [2019-09-08 06:13:05,896 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:13:05,991 INFO L134 CoverageAnalysis]: Checked inductivity of 7120 backedges. 214 proven. 1491 refuted. 0 times theorem prover too weak. 5415 trivial. 0 not checked. [2019-09-08 06:13:05,995 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:13:05,996 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2019-09-08 06:13:05,997 INFO L454 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-09-08 06:13:05,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-09-08 06:13:05,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2019-09-08 06:13:05,998 INFO L87 Difference]: Start difference. First operand 71 states and 94 transitions. Second operand 11 states. [2019-09-08 06:13:06,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:13:06,204 INFO L93 Difference]: Finished difference Result 80 states and 113 transitions. [2019-09-08 06:13:06,205 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-09-08 06:13:06,205 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 354 [2019-09-08 06:13:06,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:13:06,208 INFO L225 Difference]: With dead ends: 80 [2019-09-08 06:13:06,208 INFO L226 Difference]: Without dead ends: 76 [2019-09-08 06:13:06,209 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 377 GetRequests, 361 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=110, Invalid=196, Unknown=0, NotChecked=0, Total=306 [2019-09-08 06:13:06,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2019-09-08 06:13:06,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2019-09-08 06:13:06,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2019-09-08 06:13:06,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 108 transitions. [2019-09-08 06:13:06,221 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 108 transitions. Word has length 354 [2019-09-08 06:13:06,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:13:06,222 INFO L475 AbstractCegarLoop]: Abstraction has 76 states and 108 transitions. [2019-09-08 06:13:06,222 INFO L476 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-09-08 06:13:06,222 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 108 transitions. [2019-09-08 06:13:06,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 655 [2019-09-08 06:13:06,238 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:13:06,238 INFO L399 BasicCegarLoop]: trace histogram [95, 95, 77, 47, 47, 47, 47, 47, 47, 47, 30, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:13:06,239 INFO L418 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:13:06,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:13:06,239 INFO L82 PathProgramCache]: Analyzing trace with hash 504981732, now seen corresponding path program 8 times [2019-09-08 06:13:06,239 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:13:06,239 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:13:06,240 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:13:06,240 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 06:13:06,241 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:13:06,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:13:06,666 INFO L134 CoverageAnalysis]: Checked inductivity of 25110 backedges. 473 proven. 3406 refuted. 0 times theorem prover too weak. 21231 trivial. 0 not checked. [2019-09-08 06:13:06,667 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:13:06,667 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:13:06,678 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-08 06:13:06,860 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-08 06:13:06,860 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:13:06,864 INFO L256 TraceCheckSpWp]: Trace formula consists of 1453 conjuncts, 18 conjunts are in the unsatisfiable core [2019-09-08 06:13:06,875 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:13:07,211 INFO L134 CoverageAnalysis]: Checked inductivity of 25110 backedges. 473 proven. 3406 refuted. 0 times theorem prover too weak. 21231 trivial. 0 not checked. [2019-09-08 06:13:07,217 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:13:07,218 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2019-09-08 06:13:07,219 INFO L454 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-09-08 06:13:07,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-09-08 06:13:07,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2019-09-08 06:13:07,220 INFO L87 Difference]: Start difference. First operand 76 states and 108 transitions. Second operand 12 states. [2019-09-08 06:13:07,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:13:07,453 INFO L93 Difference]: Finished difference Result 85 states and 129 transitions. [2019-09-08 06:13:07,453 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-09-08 06:13:07,453 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 654 [2019-09-08 06:13:07,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:13:07,459 INFO L225 Difference]: With dead ends: 85 [2019-09-08 06:13:07,459 INFO L226 Difference]: Without dead ends: 81 [2019-09-08 06:13:07,460 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 680 GetRequests, 662 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=137, Invalid=243, Unknown=0, NotChecked=0, Total=380 [2019-09-08 06:13:07,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2019-09-08 06:13:07,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2019-09-08 06:13:07,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2019-09-08 06:13:07,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 124 transitions. [2019-09-08 06:13:07,479 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 124 transitions. Word has length 654 [2019-09-08 06:13:07,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:13:07,482 INFO L475 AbstractCegarLoop]: Abstraction has 81 states and 124 transitions. [2019-09-08 06:13:07,482 INFO L476 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-09-08 06:13:07,483 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 124 transitions. [2019-09-08 06:13:07,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 859 [2019-09-08 06:13:07,492 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:13:07,492 INFO L399 BasicCegarLoop]: trace histogram [125, 125, 101, 62, 62, 62, 62, 62, 62, 62, 39, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:13:07,492 INFO L418 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:13:07,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:13:07,494 INFO L82 PathProgramCache]: Analyzing trace with hash 1913587321, now seen corresponding path program 9 times [2019-09-08 06:13:07,494 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:13:07,494 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:13:07,495 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:13:07,495 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:13:07,495 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:13:07,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:13:08,451 INFO L134 CoverageAnalysis]: Checked inductivity of 43614 backedges. 799 proven. 4412 refuted. 0 times theorem prover too weak. 38403 trivial. 0 not checked. [2019-09-08 06:13:08,452 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:13:08,452 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-08 06:13:08,475 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:13:08,639 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 36 check-sat command(s) [2019-09-08 06:13:08,639 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:13:08,641 INFO L256 TraceCheckSpWp]: Trace formula consists of 661 conjuncts, 20 conjunts are in the unsatisfiable core [2019-09-08 06:13:08,653 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:13:09,048 INFO L134 CoverageAnalysis]: Checked inductivity of 43614 backedges. 755 proven. 5089 refuted. 0 times theorem prover too weak. 37770 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (11)] Exception during sending of exit command (exit): Broken pipe [2019-09-08 06:13:09,058 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:13:09,059 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 13 [2019-09-08 06:13:09,060 INFO L454 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-09-08 06:13:09,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-09-08 06:13:09,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2019-09-08 06:13:09,061 INFO L87 Difference]: Start difference. First operand 81 states and 124 transitions. Second operand 13 states. [2019-09-08 06:13:09,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:13:09,302 INFO L93 Difference]: Finished difference Result 90 states and 147 transitions. [2019-09-08 06:13:09,302 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-09-08 06:13:09,302 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 858 [2019-09-08 06:13:09,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:13:09,305 INFO L225 Difference]: With dead ends: 90 [2019-09-08 06:13:09,306 INFO L226 Difference]: Without dead ends: 86 [2019-09-08 06:13:09,306 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 885 GetRequests, 865 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=167, Invalid=295, Unknown=0, NotChecked=0, Total=462 [2019-09-08 06:13:09,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2019-09-08 06:13:09,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2019-09-08 06:13:09,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2019-09-08 06:13:09,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 142 transitions. [2019-09-08 06:13:09,319 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 142 transitions. Word has length 858 [2019-09-08 06:13:09,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:13:09,321 INFO L475 AbstractCegarLoop]: Abstraction has 86 states and 142 transitions. [2019-09-08 06:13:09,321 INFO L476 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-09-08 06:13:09,321 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 142 transitions. [2019-09-08 06:13:09,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1636 [2019-09-08 06:13:09,342 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:13:09,343 INFO L399 BasicCegarLoop]: trace histogram [239, 239, 194, 119, 119, 119, 119, 119, 119, 119, 75, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:13:09,343 INFO L418 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:13:09,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:13:09,344 INFO L82 PathProgramCache]: Analyzing trace with hash -1252276512, now seen corresponding path program 10 times [2019-09-08 06:13:09,344 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:13:09,344 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:13:09,345 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:13:09,345 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:13:09,345 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:13:09,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:13:11,047 INFO L134 CoverageAnalysis]: Checked inductivity of 160569 backedges. 1992 proven. 10047 refuted. 0 times theorem prover too weak. 148530 trivial. 0 not checked. [2019-09-08 06:13:11,047 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:13:11,047 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:13:11,062 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-08 06:13:11,408 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-08 06:13:11,409 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:13:11,414 INFO L256 TraceCheckSpWp]: Trace formula consists of 2912 conjuncts, 21 conjunts are in the unsatisfiable core [2019-09-08 06:13:11,438 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:13:12,378 INFO L134 CoverageAnalysis]: Checked inductivity of 160569 backedges. 2004 proven. 10027 refuted. 0 times theorem prover too weak. 148538 trivial. 0 not checked. [2019-09-08 06:13:12,382 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:13:12,383 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 17 [2019-09-08 06:13:12,385 INFO L454 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-09-08 06:13:12,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-09-08 06:13:12,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2019-09-08 06:13:12,386 INFO L87 Difference]: Start difference. First operand 86 states and 142 transitions. Second operand 17 states. [2019-09-08 06:13:12,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:13:12,651 INFO L93 Difference]: Finished difference Result 194 states and 808 transitions. [2019-09-08 06:13:12,651 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-09-08 06:13:12,651 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 1635 [2019-09-08 06:13:12,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:13:12,656 INFO L225 Difference]: With dead ends: 194 [2019-09-08 06:13:12,656 INFO L226 Difference]: Without dead ends: 89 [2019-09-08 06:13:12,661 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 1665 GetRequests, 1641 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=205, Invalid=395, Unknown=0, NotChecked=0, Total=600 [2019-09-08 06:13:12,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2019-09-08 06:13:12,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2019-09-08 06:13:12,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2019-09-08 06:13:12,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 108 transitions. [2019-09-08 06:13:12,673 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 108 transitions. Word has length 1635 [2019-09-08 06:13:12,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:13:12,674 INFO L475 AbstractCegarLoop]: Abstraction has 89 states and 108 transitions. [2019-09-08 06:13:12,675 INFO L476 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-09-08 06:13:12,675 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 108 transitions. [2019-09-08 06:13:12,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1336 [2019-09-08 06:13:12,690 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:13:12,691 INFO L399 BasicCegarLoop]: trace histogram [195, 195, 158, 97, 97, 97, 97, 97, 97, 97, 61, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:13:12,691 INFO L418 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:13:12,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:13:12,692 INFO L82 PathProgramCache]: Analyzing trace with hash -1195644188, now seen corresponding path program 11 times [2019-09-08 06:13:12,692 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:13:12,692 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:13:12,693 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:13:12,694 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:13:12,694 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:13:12,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:13:13,905 INFO L134 CoverageAnalysis]: Checked inductivity of 106687 backedges. 2054 proven. 6641 refuted. 0 times theorem prover too weak. 97992 trivial. 0 not checked. [2019-09-08 06:13:13,906 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:13:13,906 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:13:13,916 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-08 06:13:14,058 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 23 check-sat command(s) [2019-09-08 06:13:14,059 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:13:14,061 INFO L256 TraceCheckSpWp]: Trace formula consists of 402 conjuncts, 18 conjunts are in the unsatisfiable core [2019-09-08 06:13:14,082 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:13:14,797 INFO L134 CoverageAnalysis]: Checked inductivity of 106687 backedges. 41066 proven. 358 refuted. 0 times theorem prover too weak. 65263 trivial. 0 not checked. [2019-09-08 06:13:14,802 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:13:14,802 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 22 [2019-09-08 06:13:14,804 INFO L454 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-09-08 06:13:14,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-09-08 06:13:14,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=366, Unknown=0, NotChecked=0, Total=462 [2019-09-08 06:13:14,805 INFO L87 Difference]: Start difference. First operand 89 states and 108 transitions. Second operand 22 states. [2019-09-08 06:13:15,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:13:15,625 INFO L93 Difference]: Finished difference Result 226 states and 382 transitions. [2019-09-08 06:13:15,625 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-09-08 06:13:15,626 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 1335 [2019-09-08 06:13:15,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:13:15,628 INFO L225 Difference]: With dead ends: 226 [2019-09-08 06:13:15,628 INFO L226 Difference]: Without dead ends: 120 [2019-09-08 06:13:15,631 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 1371 GetRequests, 1335 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=343, Invalid=1063, Unknown=0, NotChecked=0, Total=1406 [2019-09-08 06:13:15,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2019-09-08 06:13:15,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 105. [2019-09-08 06:13:15,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2019-09-08 06:13:15,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 132 transitions. [2019-09-08 06:13:15,642 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 132 transitions. Word has length 1335 [2019-09-08 06:13:15,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:13:15,643 INFO L475 AbstractCegarLoop]: Abstraction has 105 states and 132 transitions. [2019-09-08 06:13:15,643 INFO L476 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-09-08 06:13:15,643 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 132 transitions. [2019-09-08 06:13:15,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1349 [2019-09-08 06:13:15,657 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:13:15,658 INFO L399 BasicCegarLoop]: trace histogram [197, 197, 159, 98, 98, 98, 98, 98, 98, 98, 61, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:13:15,658 INFO L418 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:13:15,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:13:15,659 INFO L82 PathProgramCache]: Analyzing trace with hash 262179341, now seen corresponding path program 12 times [2019-09-08 06:13:15,659 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:13:15,659 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:13:15,660 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:13:15,660 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:13:15,660 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:13:15,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:13:16,757 INFO L134 CoverageAnalysis]: Checked inductivity of 108797 backedges. 3713 proven. 5070 refuted. 0 times theorem prover too weak. 100014 trivial. 0 not checked. [2019-09-08 06:13:16,757 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:13:16,757 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:13:16,768 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-08 06:13:17,504 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 100 check-sat command(s) [2019-09-08 06:13:17,504 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:13:17,511 INFO L256 TraceCheckSpWp]: Trace formula consists of 1763 conjuncts, 21 conjunts are in the unsatisfiable core [2019-09-08 06:13:17,539 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:13:18,403 INFO L134 CoverageAnalysis]: Checked inductivity of 108797 backedges. 4101 proven. 5725 refuted. 0 times theorem prover too weak. 98971 trivial. 0 not checked. [2019-09-08 06:13:18,409 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:13:18,410 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 17 [2019-09-08 06:13:18,411 INFO L454 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-09-08 06:13:18,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-09-08 06:13:18,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2019-09-08 06:13:18,412 INFO L87 Difference]: Start difference. First operand 105 states and 132 transitions. Second operand 17 states. [2019-09-08 06:13:18,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:13:18,659 INFO L93 Difference]: Finished difference Result 136 states and 183 transitions. [2019-09-08 06:13:18,659 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-09-08 06:13:18,659 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 1348 [2019-09-08 06:13:18,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:13:18,662 INFO L225 Difference]: With dead ends: 136 [2019-09-08 06:13:18,662 INFO L226 Difference]: Without dead ends: 116 [2019-09-08 06:13:18,663 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 1376 GetRequests, 1352 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=205, Invalid=395, Unknown=0, NotChecked=0, Total=600 [2019-09-08 06:13:18,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2019-09-08 06:13:18,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 116. [2019-09-08 06:13:18,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2019-09-08 06:13:18,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 156 transitions. [2019-09-08 06:13:18,674 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 156 transitions. Word has length 1348 [2019-09-08 06:13:18,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:13:18,676 INFO L475 AbstractCegarLoop]: Abstraction has 116 states and 156 transitions. [2019-09-08 06:13:18,676 INFO L476 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-09-08 06:13:18,676 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 156 transitions. [2019-09-08 06:13:18,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1213 [2019-09-08 06:13:18,690 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:13:18,690 INFO L399 BasicCegarLoop]: trace histogram [177, 177, 143, 88, 88, 88, 88, 88, 88, 88, 55, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:13:18,690 INFO L418 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:13:18,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:13:18,691 INFO L82 PathProgramCache]: Analyzing trace with hash 452920407, now seen corresponding path program 13 times [2019-09-08 06:13:18,691 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:13:18,691 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:13:18,692 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:13:18,692 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:13:18,693 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:13:19,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:13:21,869 INFO L134 CoverageAnalysis]: Checked inductivity of 87769 backedges. 0 proven. 28921 refuted. 0 times theorem prover too weak. 58848 trivial. 0 not checked. [2019-09-08 06:13:21,869 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:13:21,869 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:13:21,879 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 06:13:22,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:13:22,203 INFO L256 TraceCheckSpWp]: Trace formula consists of 2692 conjuncts, 711 conjunts are in the unsatisfiable core [2019-09-08 06:13:22,222 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:13:24,303 INFO L134 CoverageAnalysis]: Checked inductivity of 87769 backedges. 0 proven. 28921 refuted. 0 times theorem prover too weak. 58848 trivial. 0 not checked. [2019-09-08 06:13:24,309 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:13:24,309 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 40 [2019-09-08 06:13:24,310 INFO L454 AbstractCegarLoop]: Interpolant automaton has 40 states [2019-09-08 06:13:24,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2019-09-08 06:13:24,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=1465, Unknown=0, NotChecked=0, Total=1560 [2019-09-08 06:13:24,311 INFO L87 Difference]: Start difference. First operand 116 states and 156 transitions. Second operand 40 states. [2019-09-08 06:13:25,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:13:25,048 INFO L93 Difference]: Finished difference Result 139 states and 186 transitions. [2019-09-08 06:13:25,049 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2019-09-08 06:13:25,049 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 1212 [2019-09-08 06:13:25,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:13:25,052 INFO L225 Difference]: With dead ends: 139 [2019-09-08 06:13:25,052 INFO L226 Difference]: Without dead ends: 132 [2019-09-08 06:13:25,054 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 1568 GetRequests, 1440 SyntacticMatches, 90 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=95, Invalid=1465, Unknown=0, NotChecked=0, Total=1560 [2019-09-08 06:13:25,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2019-09-08 06:13:25,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 130. [2019-09-08 06:13:25,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2019-09-08 06:13:25,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 177 transitions. [2019-09-08 06:13:25,066 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 177 transitions. Word has length 1212 [2019-09-08 06:13:25,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:13:25,068 INFO L475 AbstractCegarLoop]: Abstraction has 130 states and 177 transitions. [2019-09-08 06:13:25,068 INFO L476 AbstractCegarLoop]: Interpolant automaton has 40 states. [2019-09-08 06:13:25,068 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 177 transitions. [2019-09-08 06:13:25,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1349 [2019-09-08 06:13:25,085 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:13:25,086 INFO L399 BasicCegarLoop]: trace histogram [197, 197, 159, 98, 98, 98, 98, 98, 98, 98, 61, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:13:25,086 INFO L418 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:13:25,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:13:25,087 INFO L82 PathProgramCache]: Analyzing trace with hash 1790308215, now seen corresponding path program 14 times [2019-09-08 06:13:25,087 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:13:25,087 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:13:25,088 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:13:25,088 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 06:13:25,088 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:13:25,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:13:26,679 INFO L134 CoverageAnalysis]: Checked inductivity of 108797 backedges. 2650 proven. 6133 refuted. 0 times theorem prover too weak. 100014 trivial. 0 not checked. [2019-09-08 06:13:26,680 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:13:26,680 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:13:26,703 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-08 06:13:27,074 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-08 06:13:27,075 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:13:27,080 INFO L256 TraceCheckSpWp]: Trace formula consists of 2994 conjuncts, 21 conjunts are in the unsatisfiable core [2019-09-08 06:13:27,098 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:13:27,784 INFO L134 CoverageAnalysis]: Checked inductivity of 108797 backedges. 2887 proven. 6939 refuted. 0 times theorem prover too weak. 98971 trivial. 0 not checked. [2019-09-08 06:13:27,790 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:13:27,790 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 17 [2019-09-08 06:13:27,791 INFO L454 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-09-08 06:13:27,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-09-08 06:13:27,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2019-09-08 06:13:27,792 INFO L87 Difference]: Start difference. First operand 130 states and 177 transitions. Second operand 17 states. [2019-09-08 06:13:28,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:13:28,004 INFO L93 Difference]: Finished difference Result 147 states and 199 transitions. [2019-09-08 06:13:28,004 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-09-08 06:13:28,004 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 1348 [2019-09-08 06:13:28,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:13:28,008 INFO L225 Difference]: With dead ends: 147 [2019-09-08 06:13:28,008 INFO L226 Difference]: Without dead ends: 130 [2019-09-08 06:13:28,009 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 1376 GetRequests, 1352 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=205, Invalid=395, Unknown=0, NotChecked=0, Total=600 [2019-09-08 06:13:28,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2019-09-08 06:13:28,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 127. [2019-09-08 06:13:28,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2019-09-08 06:13:28,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 166 transitions. [2019-09-08 06:13:28,023 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 166 transitions. Word has length 1348 [2019-09-08 06:13:28,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:13:28,023 INFO L475 AbstractCegarLoop]: Abstraction has 127 states and 166 transitions. [2019-09-08 06:13:28,023 INFO L476 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-09-08 06:13:28,024 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 166 transitions. [2019-09-08 06:13:28,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1349 [2019-09-08 06:13:28,040 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:13:28,040 INFO L399 BasicCegarLoop]: trace histogram [197, 197, 159, 98, 98, 98, 98, 98, 98, 98, 61, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:13:28,041 INFO L418 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:13:28,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:13:28,042 INFO L82 PathProgramCache]: Analyzing trace with hash -157959539, now seen corresponding path program 15 times [2019-09-08 06:13:28,042 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:13:28,042 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:13:28,043 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:13:28,043 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:13:28,043 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:13:28,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:13:29,266 INFO L134 CoverageAnalysis]: Checked inductivity of 108797 backedges. 1626 proven. 9246 refuted. 0 times theorem prover too weak. 97925 trivial. 0 not checked. [2019-09-08 06:13:29,267 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:13:29,267 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:13:29,278 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-08 06:13:29,467 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 40 check-sat command(s) [2019-09-08 06:13:29,468 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:13:29,470 INFO L256 TraceCheckSpWp]: Trace formula consists of 766 conjuncts, 23 conjunts are in the unsatisfiable core [2019-09-08 06:13:29,489 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:13:30,880 INFO L134 CoverageAnalysis]: Checked inductivity of 108797 backedges. 1644 proven. 9219 refuted. 0 times theorem prover too weak. 97934 trivial. 0 not checked. [2019-09-08 06:13:30,885 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:13:30,885 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 18 [2019-09-08 06:13:30,886 INFO L454 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-09-08 06:13:30,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-09-08 06:13:30,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2019-09-08 06:13:30,887 INFO L87 Difference]: Start difference. First operand 127 states and 166 transitions. Second operand 18 states. [2019-09-08 06:13:31,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:13:31,154 INFO L93 Difference]: Finished difference Result 173 states and 246 transitions. [2019-09-08 06:13:31,154 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-09-08 06:13:31,155 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 1348 [2019-09-08 06:13:31,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:13:31,157 INFO L225 Difference]: With dead ends: 173 [2019-09-08 06:13:31,157 INFO L226 Difference]: Without dead ends: 0 [2019-09-08 06:13:31,159 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 1381 GetRequests, 1355 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=241, Invalid=461, Unknown=0, NotChecked=0, Total=702 [2019-09-08 06:13:31,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-09-08 06:13:31,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-09-08 06:13:31,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-09-08 06:13:31,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-09-08 06:13:31,160 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 1348 [2019-09-08 06:13:31,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:13:31,161 INFO L475 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-09-08 06:13:31,161 INFO L476 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-09-08 06:13:31,161 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-09-08 06:13:31,161 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-09-08 06:13:31,167 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2019-09-08 06:13:33,488 WARN L188 SmtUtils]: Spent 1.01 s on a formula simplification. DAG size of input: 149 DAG size of output: 68 [2019-09-08 06:13:33,612 WARN L188 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 7 [2019-09-08 06:13:33,615 INFO L446 ceAbstractionStarter]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2019-09-08 06:13:33,616 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2019-09-08 06:13:33,616 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2019-09-08 06:13:33,616 INFO L446 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2019-09-08 06:13:33,616 INFO L446 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2019-09-08 06:13:33,616 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2019-09-08 06:13:33,617 INFO L446 ceAbstractionStarter]: At program point mainENTRY(lines 23 30) the Hoare annotation is: true [2019-09-08 06:13:33,617 INFO L443 ceAbstractionStarter]: For program point L27(line 27) no Hoare annotation was computed. [2019-09-08 06:13:33,617 INFO L443 ceAbstractionStarter]: For program point L26(lines 26 28) no Hoare annotation was computed. [2019-09-08 06:13:33,617 INFO L439 ceAbstractionStarter]: At program point L25(line 25) the Hoare annotation is: (and (<= main_~x~0 10) (<= 10 main_~x~0)) [2019-09-08 06:13:33,617 INFO L443 ceAbstractionStarter]: For program point mainEXIT(lines 23 30) no Hoare annotation was computed. [2019-09-08 06:13:33,618 INFO L443 ceAbstractionStarter]: For program point L25-1(line 25) no Hoare annotation was computed. [2019-09-08 06:13:33,618 INFO L443 ceAbstractionStarter]: For program point L26-2(lines 26 28) no Hoare annotation was computed. [2019-09-08 06:13:33,618 INFO L443 ceAbstractionStarter]: For program point mainFINAL(lines 23 30) no Hoare annotation was computed. [2019-09-08 06:13:33,618 INFO L443 ceAbstractionStarter]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 27) no Hoare annotation was computed. [2019-09-08 06:13:33,618 INFO L443 ceAbstractionStarter]: For program point fiboEXIT(lines 5 13) no Hoare annotation was computed. [2019-09-08 06:13:33,619 INFO L443 ceAbstractionStarter]: For program point fiboFINAL(lines 5 13) no Hoare annotation was computed. [2019-09-08 06:13:33,619 INFO L439 ceAbstractionStarter]: At program point L11(line 11) the Hoare annotation is: (and (<= fibo_~n |fibo_#in~n|) (<= |fibo_#in~n| fibo_~n) (< 1 fibo_~n)) [2019-09-08 06:13:33,619 INFO L443 ceAbstractionStarter]: For program point L11-1(line 11) no Hoare annotation was computed. [2019-09-08 06:13:33,620 INFO L439 ceAbstractionStarter]: At program point L11-2(line 11) the Hoare annotation is: (let ((.cse0 (<= 8 |fibo_#in~n|))) (and (or (and (<= 34 |fibo_#t~ret0|) (<= |fibo_#t~ret0| 34)) (<= |fibo_#in~n| 9) (<= 11 |fibo_#in~n|)) (let ((.cse2 (<= |fibo_#in~n| fibo_~n)) (.cse1 (<= fibo_~n |fibo_#in~n|)) (.cse3 (<= |fibo_#t~ret0| 1)) (.cse4 (<= 1 |fibo_#t~ret0|))) (or (and .cse0 .cse1 .cse2) (and (<= 5 |fibo_#in~n|) .cse1 (<= 3 |fibo_#t~ret0|) .cse2 (<= |fibo_#t~ret0| 3) (<= |fibo_#in~n| 5)) (and (<= |fibo_#in~n| 2) .cse1 .cse3 .cse4 (< 1 fibo_~n)) (and (<= |fibo_#t~ret0| 5) (<= |fibo_#in~n| 6) .cse1 .cse2 (<= 5 |fibo_#t~ret0|) (<= 6 |fibo_#in~n|)) (and (<= 7 |fibo_#in~n|) (<= |fibo_#t~ret0| 8) .cse1 .cse2 (<= 8 |fibo_#t~ret0|)) (and (<= 4 |fibo_#in~n|) (<= |fibo_#in~n| 4) .cse1 .cse2 (<= 2 |fibo_#t~ret0|) (<= |fibo_#t~ret0| 2)) (and .cse1 .cse3 (<= |fibo_#in~n| 3) .cse4 (<= 3 fibo_~n)))) (or (<= 9 |fibo_#in~n|) (not .cse0) (and (<= 13 |fibo_#t~ret0|) (<= |fibo_#t~ret0| 13))) (or (<= 10 |fibo_#in~n|) (<= |fibo_#in~n| 8) (and (<= |fibo_#t~ret0| 21) (<= 21 |fibo_#t~ret0|))))) [2019-09-08 06:13:33,620 INFO L443 ceAbstractionStarter]: For program point L8(lines 8 12) no Hoare annotation was computed. [2019-09-08 06:13:33,620 INFO L443 ceAbstractionStarter]: For program point L11-3(line 11) no Hoare annotation was computed. [2019-09-08 06:13:33,620 INFO L443 ceAbstractionStarter]: For program point L6(lines 6 12) no Hoare annotation was computed. [2019-09-08 06:13:33,620 INFO L446 ceAbstractionStarter]: At program point fiboENTRY(lines 5 13) the Hoare annotation is: true [2019-09-08 06:13:33,625 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 08.09 06:13:33 BoogieIcfgContainer [2019-09-08 06:13:33,625 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-09-08 06:13:33,628 INFO L168 Benchmark]: Toolchain (without parser) took 32894.64 ms. Allocated memory was 132.1 MB in the beginning and 2.5 GB in the end (delta: 2.4 GB). Free memory was 88.2 MB in the beginning and 496.7 MB in the end (delta: -408.5 MB). Peak memory consumption was 1.9 GB. Max. memory is 7.1 GB. [2019-09-08 06:13:33,629 INFO L168 Benchmark]: CDTParser took 0.40 ms. Allocated memory is still 132.1 MB. Free memory was 106.6 MB in the beginning and 106.4 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. [2019-09-08 06:13:33,631 INFO L168 Benchmark]: CACSL2BoogieTranslator took 242.11 ms. Allocated memory is still 132.1 MB. Free memory was 87.7 MB in the beginning and 78.8 MB in the end (delta: 8.9 MB). Peak memory consumption was 8.9 MB. Max. memory is 7.1 GB. [2019-09-08 06:13:33,637 INFO L168 Benchmark]: Boogie Preprocessor took 95.78 ms. Allocated memory was 132.1 MB in the beginning and 198.7 MB in the end (delta: 66.6 MB). Free memory was 78.8 MB in the beginning and 176.2 MB in the end (delta: -97.4 MB). Peak memory consumption was 16.4 MB. Max. memory is 7.1 GB. [2019-09-08 06:13:33,638 INFO L168 Benchmark]: RCFGBuilder took 242.03 ms. Allocated memory is still 198.7 MB. Free memory was 175.6 MB in the beginning and 164.7 MB in the end (delta: 10.9 MB). Peak memory consumption was 10.9 MB. Max. memory is 7.1 GB. [2019-09-08 06:13:33,639 INFO L168 Benchmark]: TraceAbstraction took 32309.68 ms. Allocated memory was 198.7 MB in the beginning and 2.5 GB in the end (delta: 2.3 GB). Free memory was 164.1 MB in the beginning and 496.7 MB in the end (delta: -332.5 MB). Peak memory consumption was 2.0 GB. Max. memory is 7.1 GB. [2019-09-08 06:13:33,653 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.40 ms. Allocated memory is still 132.1 MB. Free memory was 106.6 MB in the beginning and 106.4 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 242.11 ms. Allocated memory is still 132.1 MB. Free memory was 87.7 MB in the beginning and 78.8 MB in the end (delta: 8.9 MB). Peak memory consumption was 8.9 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 95.78 ms. Allocated memory was 132.1 MB in the beginning and 198.7 MB in the end (delta: 66.6 MB). Free memory was 78.8 MB in the beginning and 176.2 MB in the end (delta: -97.4 MB). Peak memory consumption was 16.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 242.03 ms. Allocated memory is still 198.7 MB. Free memory was 175.6 MB in the beginning and 164.7 MB in the end (delta: 10.9 MB). Peak memory consumption was 10.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 32309.68 ms. Allocated memory was 198.7 MB in the beginning and 2.5 GB in the end (delta: 2.3 GB). Free memory was 164.1 MB in the beginning and 496.7 MB in the end (delta: -332.5 MB). Peak memory consumption was 2.0 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 27]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 24 locations, 1 error locations. SAFE Result, 32.1s OverallTime, 18 OverallIterations, 239 TraceHistogramMax, 5.0s AutomataDifference, 0.0s DeadEndRemovalTime, 2.4s HoareAnnotationTime, HoareTripleCheckerStatistics: 492 SDtfs, 493 SDslu, 2753 SDs, 0 SdLazy, 3180 SolverSat, 655 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 11443 GetRequests, 11021 SyntacticMatches, 95 SemanticMatches, 327 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1103 ImplicationChecksByTransitivity, 4.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=130occurred in iteration=16, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 18 MinimizatonAttempts, 33 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 245 PreInvPairs, 1876 NumberOfFragments, 182 HoareAnnotationTreeSize, 245 FomulaSimplifications, 21109 FormulaSimplificationTreeSizeReduction, 1.2s HoareSimplificationTime, 8 FomulaSimplificationsInter, 7669 FormulaSimplificationTreeSizeReductionInter, 1.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.6s SsaConstructionTime, 4.3s SatisfiabilityAnalysisTime, 12.4s InterpolantComputationTime, 21491 NumberOfCodeBlocks, 17821 NumberOfCodeBlocksAsserted, 262 NumberOfCheckSat, 21457 ConstructedInterpolants, 0 QuantifiedInterpolants, 38247335 SizeOfPredicates, 107 NumberOfNonLiveVariables, 15491 ConjunctsInSsa, 927 ConjunctsInUnsatCore, 34 InterpolantComputations, 2 PerfectInterpolantSequences, 1375633/1523780 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...