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/loops/heavy-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-c6af20d [2019-09-03 19:19:47,508 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-03 19:19:47,510 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-03 19:19:47,522 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-09-03 19:19:47,523 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-09-03 19:19:47,524 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-09-03 19:19:47,525 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-09-03 19:19:47,527 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-09-03 19:19:47,528 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-09-03 19:19:47,529 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-09-03 19:19:47,530 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-09-03 19:19:47,532 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-09-03 19:19:47,532 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-03 19:19:47,533 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-03 19:19:47,534 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-03 19:19:47,535 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-03 19:19:47,536 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-03 19:19:47,537 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-03 19:19:47,538 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-03 19:19:47,541 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-03 19:19:47,542 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-03 19:19:47,543 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-03 19:19:47,545 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-03 19:19:47,545 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-03 19:19:47,548 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-09-03 19:19:47,556 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-03 19:19:47,557 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-03 19:19:47,558 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-03 19:19:47,559 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 [2019-09-03 19:19:47,579 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-03 19:19:47,580 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-03 19:19:47,581 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-09-03 19:19:47,581 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-09-03 19:19:47,582 INFO L138 SettingsManager]: * Use SBE=true [2019-09-03 19:19:47,582 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-03 19:19:47,582 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-03 19:19:47,582 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-09-03 19:19:47,583 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-03 19:19:47,583 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-03 19:19:47,583 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-03 19:19:47,584 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-03 19:19:47,584 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-03 19:19:47,584 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-03 19:19:47,584 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-03 19:19:47,584 INFO L138 SettingsManager]: * Use constant arrays=true [2019-09-03 19:19:47,585 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-03 19:19:47,585 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-03 19:19:47,585 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-03 19:19:47,586 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-09-03 19:19:47,586 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-09-03 19:19:47,586 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-03 19:19:47,586 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-03 19:19:47,586 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-03 19:19:47,587 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-09-03 19:19:47,587 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-09-03 19:19:47,587 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-03 19:19:47,587 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-03 19:19:47,588 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-09-03 19:19:47,619 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-03 19:19:47,633 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-03 19:19:47,636 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-03 19:19:47,638 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-03 19:19:47,638 INFO L275 PluginConnector]: CDTParser initialized [2019-09-03 19:19:47,639 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/heavy-2.c [2019-09-03 19:19:47,699 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cbcc6f09b/585c07e798d04930944f59784394551f/FLAGbc37e22f1 [2019-09-03 19:19:48,161 INFO L306 CDTParser]: Found 1 translation units. [2019-09-03 19:19:48,163 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/heavy-2.c [2019-09-03 19:19:48,171 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cbcc6f09b/585c07e798d04930944f59784394551f/FLAGbc37e22f1 [2019-09-03 19:19:48,193 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cbcc6f09b/585c07e798d04930944f59784394551f [2019-09-03 19:19:48,206 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-03 19:19:48,208 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-03 19:19:48,215 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-03 19:19:48,215 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-03 19:19:48,219 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-03 19:19:48,220 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.09 07:19:48" (1/1) ... [2019-09-03 19:19:48,224 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2337e66b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 07:19:48, skipping insertion in model container [2019-09-03 19:19:48,224 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.09 07:19:48" (1/1) ... [2019-09-03 19:19:48,232 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-03 19:19:48,251 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-03 19:19:48,398 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-03 19:19:48,443 INFO L188 MainTranslator]: Completed pre-run [2019-09-03 19:19:48,475 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-03 19:19:48,608 INFO L192 MainTranslator]: Completed translation [2019-09-03 19:19:48,608 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 07:19:48 WrapperNode [2019-09-03 19:19:48,609 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-03 19:19:48,609 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-03 19:19:48,610 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-03 19:19:48,610 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-03 19:19:48,622 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 07:19:48" (1/1) ... [2019-09-03 19:19:48,623 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 07:19:48" (1/1) ... [2019-09-03 19:19:48,631 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 07:19:48" (1/1) ... [2019-09-03 19:19:48,631 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 07:19:48" (1/1) ... [2019-09-03 19:19:48,639 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 07:19:48" (1/1) ... [2019-09-03 19:19:48,650 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 07:19:48" (1/1) ... [2019-09-03 19:19:48,652 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 07:19:48" (1/1) ... [2019-09-03 19:19:48,657 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-03 19:19:48,658 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-03 19:19:48,658 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-03 19:19:48,658 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-03 19:19:48,659 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 07:19:48" (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 [2019-09-03 19:19:48,716 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-03 19:19:48,716 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-03 19:19:48,716 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-03 19:19:48,716 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-03 19:19:48,717 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-03 19:19:48,717 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-09-03 19:19:48,717 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-09-03 19:19:48,717 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-03 19:19:48,717 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-09-03 19:19:48,717 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2019-09-03 19:19:48,718 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-03 19:19:48,718 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-09-03 19:19:49,021 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-03 19:19:49,022 INFO L283 CfgBuilder]: Removed 3 assume(true) statements. [2019-09-03 19:19:49,023 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.09 07:19:49 BoogieIcfgContainer [2019-09-03 19:19:49,023 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-03 19:19:49,025 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-03 19:19:49,025 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-03 19:19:49,029 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-03 19:19:49,029 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.09 07:19:48" (1/3) ... [2019-09-03 19:19:49,030 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@630cb4fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.09 07:19:49, skipping insertion in model container [2019-09-03 19:19:49,030 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 07:19:48" (2/3) ... [2019-09-03 19:19:49,030 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@630cb4fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.09 07:19:49, skipping insertion in model container [2019-09-03 19:19:49,031 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.09 07:19:49" (3/3) ... [2019-09-03 19:19:49,032 INFO L109 eAbstractionObserver]: Analyzing ICFG heavy-2.c [2019-09-03 19:19:49,042 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-03 19:19:49,050 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-03 19:19:49,067 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-03 19:19:49,093 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2019-09-03 19:19:49,094 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-03 19:19:49,094 INFO L378 AbstractCegarLoop]: Hoare is true [2019-09-03 19:19:49,094 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-03 19:19:49,094 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-03 19:19:49,095 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-03 19:19:49,095 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-03 19:19:49,095 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-03 19:19:49,095 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-03 19:19:49,110 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2019-09-03 19:19:49,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-09-03 19:19:49,116 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 19:19:49,117 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 19:19:49,119 INFO L418 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 19:19:49,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 19:19:49,125 INFO L82 PathProgramCache]: Analyzing trace with hash 242978043, now seen corresponding path program 1 times [2019-09-03 19:19:49,126 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 19:19:49,127 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 19:19:49,173 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:19:49,174 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 19:19:49,174 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:19:49,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 19:19:49,280 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 19:19:49,282 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-03 19:19:49,282 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-09-03 19:19:49,285 INFO L454 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-09-03 19:19:49,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-09-03 19:19:49,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-03 19:19:49,297 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 2 states. [2019-09-03 19:19:49,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 19:19:49,317 INFO L93 Difference]: Finished difference Result 32 states and 44 transitions. [2019-09-03 19:19:49,317 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-09-03 19:19:49,318 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 9 [2019-09-03 19:19:49,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 19:19:49,327 INFO L225 Difference]: With dead ends: 32 [2019-09-03 19:19:49,327 INFO L226 Difference]: Without dead ends: 15 [2019-09-03 19:19:49,331 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-03 19:19:49,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2019-09-03 19:19:49,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2019-09-03 19:19:49,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2019-09-03 19:19:49,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2019-09-03 19:19:49,372 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 9 [2019-09-03 19:19:49,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 19:19:49,372 INFO L475 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2019-09-03 19:19:49,372 INFO L476 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-09-03 19:19:49,373 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2019-09-03 19:19:49,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-09-03 19:19:49,373 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 19:19:49,373 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 19:19:49,374 INFO L418 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 19:19:49,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 19:19:49,374 INFO L82 PathProgramCache]: Analyzing trace with hash 242949213, now seen corresponding path program 1 times [2019-09-03 19:19:49,374 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 19:19:49,375 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 19:19:49,376 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:19:49,376 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 19:19:49,376 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:19:49,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 19:19:49,459 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 19:19:49,460 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-03 19:19:49,460 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-03 19:19:49,461 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-03 19:19:49,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-03 19:19:49,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-03 19:19:49,462 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand 3 states. [2019-09-03 19:19:49,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 19:19:49,505 INFO L93 Difference]: Finished difference Result 24 states and 28 transitions. [2019-09-03 19:19:49,505 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-03 19:19:49,506 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2019-09-03 19:19:49,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 19:19:49,507 INFO L225 Difference]: With dead ends: 24 [2019-09-03 19:19:49,507 INFO L226 Difference]: Without dead ends: 21 [2019-09-03 19:19:49,508 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-03 19:19:49,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2019-09-03 19:19:49,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 16. [2019-09-03 19:19:49,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2019-09-03 19:19:49,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2019-09-03 19:19:49,513 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 9 [2019-09-03 19:19:49,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 19:19:49,513 INFO L475 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2019-09-03 19:19:49,514 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-03 19:19:49,514 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2019-09-03 19:19:49,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-09-03 19:19:49,514 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 19:19:49,515 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 19:19:49,515 INFO L418 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 19:19:49,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 19:19:49,515 INFO L82 PathProgramCache]: Analyzing trace with hash 713101374, now seen corresponding path program 1 times [2019-09-03 19:19:49,516 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 19:19:49,516 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 19:19:49,517 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:19:49,517 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 19:19:49,517 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:19:49,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 19:19:49,623 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 19:19:49,624 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 19:19:49,624 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) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-03 19:19:49,643 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 19:19:49,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 19:19:49,678 INFO L256 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 6 conjunts are in the unsatisfiable core [2019-09-03 19:19:49,684 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 19:19:49,712 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 19:19:49,716 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-03 19:19:49,717 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2019-09-03 19:19:49,717 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-03 19:19:49,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-03 19:19:49,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-09-03 19:19:49,718 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand 5 states. [2019-09-03 19:19:49,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 19:19:49,821 INFO L93 Difference]: Finished difference Result 48 states and 63 transitions. [2019-09-03 19:19:49,824 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-03 19:19:49,824 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 12 [2019-09-03 19:19:49,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 19:19:49,826 INFO L225 Difference]: With dead ends: 48 [2019-09-03 19:19:49,826 INFO L226 Difference]: Without dead ends: 39 [2019-09-03 19:19:49,827 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-09-03 19:19:49,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2019-09-03 19:19:49,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 24. [2019-09-03 19:19:49,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-09-03 19:19:49,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2019-09-03 19:19:49,835 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 12 [2019-09-03 19:19:49,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 19:19:49,835 INFO L475 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2019-09-03 19:19:49,835 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-03 19:19:49,836 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2019-09-03 19:19:49,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-09-03 19:19:49,837 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 19:19:49,837 INFO L399 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 19:19:49,837 INFO L418 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 19:19:49,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 19:19:49,838 INFO L82 PathProgramCache]: Analyzing trace with hash 1308348629, now seen corresponding path program 1 times [2019-09-03 19:19:49,838 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 19:19:49,838 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 19:19:49,839 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:19:49,840 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 19:19:49,840 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:19:49,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 19:19:49,965 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-09-03 19:19:49,968 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 19:19:49,968 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) [2019-09-03 19:19:49,982 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 [2019-09-03 19:19:50,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 19:19:50,009 INFO L256 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 6 conjunts are in the unsatisfiable core [2019-09-03 19:19:50,011 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 19:19:50,036 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-09-03 19:19:50,040 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-03 19:19:50,041 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2019-09-03 19:19:50,041 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-03 19:19:50,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-03 19:19:50,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-09-03 19:19:50,042 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand 6 states. [2019-09-03 19:19:50,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 19:19:50,275 INFO L93 Difference]: Finished difference Result 66 states and 86 transitions. [2019-09-03 19:19:50,275 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-09-03 19:19:50,275 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 21 [2019-09-03 19:19:50,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 19:19:50,277 INFO L225 Difference]: With dead ends: 66 [2019-09-03 19:19:50,277 INFO L226 Difference]: Without dead ends: 50 [2019-09-03 19:19:50,278 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2019-09-03 19:19:50,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2019-09-03 19:19:50,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 36. [2019-09-03 19:19:50,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-09-03 19:19:50,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 42 transitions. [2019-09-03 19:19:50,288 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 42 transitions. Word has length 21 [2019-09-03 19:19:50,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 19:19:50,288 INFO L475 AbstractCegarLoop]: Abstraction has 36 states and 42 transitions. [2019-09-03 19:19:50,289 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-03 19:19:50,289 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 42 transitions. [2019-09-03 19:19:50,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2019-09-03 19:19:50,290 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 19:19:50,290 INFO L399 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 19:19:50,291 INFO L418 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 19:19:50,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 19:19:50,291 INFO L82 PathProgramCache]: Analyzing trace with hash 1611011581, now seen corresponding path program 1 times [2019-09-03 19:19:50,291 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 19:19:50,291 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 19:19:50,292 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:19:50,293 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 19:19:50,293 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:19:50,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 19:19:50,534 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 22 proven. 1 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-09-03 19:19:50,534 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 19:19:50,534 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) [2019-09-03 19:19:50,549 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-03 19:19:50,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 19:19:50,585 INFO L256 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 12 conjunts are in the unsatisfiable core [2019-09-03 19:19:50,587 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 19:19:50,627 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 22 proven. 1 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-09-03 19:19:50,632 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 19:19:50,632 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 7 [2019-09-03 19:19:50,632 INFO L454 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-09-03 19:19:50,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-09-03 19:19:50,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-09-03 19:19:50,633 INFO L87 Difference]: Start difference. First operand 36 states and 42 transitions. Second operand 7 states. [2019-09-03 19:19:50,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 19:19:50,691 INFO L93 Difference]: Finished difference Result 73 states and 88 transitions. [2019-09-03 19:19:50,691 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-03 19:19:50,691 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 35 [2019-09-03 19:19:50,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 19:19:50,692 INFO L225 Difference]: With dead ends: 73 [2019-09-03 19:19:50,692 INFO L226 Difference]: Without dead ends: 48 [2019-09-03 19:19:50,693 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-09-03 19:19:50,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2019-09-03 19:19:50,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 44. [2019-09-03 19:19:50,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-09-03 19:19:50,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 50 transitions. [2019-09-03 19:19:50,702 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 50 transitions. Word has length 35 [2019-09-03 19:19:50,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 19:19:50,703 INFO L475 AbstractCegarLoop]: Abstraction has 44 states and 50 transitions. [2019-09-03 19:19:50,703 INFO L476 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-09-03 19:19:50,703 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 50 transitions. [2019-09-03 19:19:50,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2019-09-03 19:19:50,704 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 19:19:50,705 INFO L399 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 19:19:50,705 INFO L418 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 19:19:50,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 19:19:50,705 INFO L82 PathProgramCache]: Analyzing trace with hash 351043197, now seen corresponding path program 2 times [2019-09-03 19:19:50,706 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 19:19:50,706 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 19:19:50,707 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:19:50,707 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 19:19:50,707 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:19:50,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 19:19:50,870 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 46 proven. 4 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2019-09-03 19:19:50,870 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 19:19:50,871 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 [2019-09-03 19:19:50,888 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-03 19:19:50,919 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2019-09-03 19:19:50,921 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 19:19:50,923 INFO L256 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 3 conjunts are in the unsatisfiable core [2019-09-03 19:19:50,928 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 19:19:50,951 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 119 trivial. 0 not checked. [2019-09-03 19:19:50,957 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-03 19:19:50,958 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2019-09-03 19:19:50,958 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-03 19:19:50,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-03 19:19:50,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-09-03 19:19:50,959 INFO L87 Difference]: Start difference. First operand 44 states and 50 transitions. Second operand 6 states. [2019-09-03 19:19:51,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 19:19:51,034 INFO L93 Difference]: Finished difference Result 85 states and 101 transitions. [2019-09-03 19:19:51,035 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-09-03 19:19:51,035 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 43 [2019-09-03 19:19:51,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 19:19:51,036 INFO L225 Difference]: With dead ends: 85 [2019-09-03 19:19:51,036 INFO L226 Difference]: Without dead ends: 0 [2019-09-03 19:19:51,037 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-09-03 19:19:51,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-09-03 19:19:51,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-09-03 19:19:51,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-09-03 19:19:51,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-09-03 19:19:51,038 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 43 [2019-09-03 19:19:51,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 19:19:51,038 INFO L475 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-09-03 19:19:51,039 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-03 19:19:51,039 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-09-03 19:19:51,039 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-09-03 19:19:51,044 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2019-09-03 19:19:51,089 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2019-09-03 19:19:51,089 INFO L446 ceAbstractionStarter]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: true [2019-09-03 19:19:51,090 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2019-09-03 19:19:51,090 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2019-09-03 19:19:51,090 INFO L446 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2019-09-03 19:19:51,090 INFO L446 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2019-09-03 19:19:51,090 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2019-09-03 19:19:51,090 INFO L443 ceAbstractionStarter]: For program point mainEXIT(lines 5 21) no Hoare annotation was computed. [2019-09-03 19:19:51,090 INFO L443 ceAbstractionStarter]: For program point mainFINAL(lines 5 21) no Hoare annotation was computed. [2019-09-03 19:19:51,091 INFO L443 ceAbstractionStarter]: For program point L11-2(lines 11 13) no Hoare annotation was computed. [2019-09-03 19:19:51,091 INFO L439 ceAbstractionStarter]: At program point L11-3(lines 11 13) the Hoare annotation is: (= main_~a~0 1) [2019-09-03 19:19:51,091 INFO L446 ceAbstractionStarter]: At program point mainENTRY(lines 5 21) the Hoare annotation is: true [2019-09-03 19:19:51,091 INFO L439 ceAbstractionStarter]: At program point L16(lines 6 21) the Hoare annotation is: false [2019-09-03 19:19:51,091 INFO L443 ceAbstractionStarter]: For program point L12-2(lines 12 13) no Hoare annotation was computed. [2019-09-03 19:19:51,092 INFO L439 ceAbstractionStarter]: At program point L12-3(lines 12 13) the Hoare annotation is: (= main_~a~0 1) [2019-09-03 19:19:51,092 INFO L443 ceAbstractionStarter]: For program point L10-2(lines 10 13) no Hoare annotation was computed. [2019-09-03 19:19:51,092 INFO L439 ceAbstractionStarter]: At program point L10-3(lines 10 13) the Hoare annotation is: (= main_~a~0 1) [2019-09-03 19:19:51,092 INFO L443 ceAbstractionStarter]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 19) no Hoare annotation was computed. [2019-09-03 19:19:51,093 INFO L443 ceAbstractionStarter]: For program point L10-4(lines 6 21) no Hoare annotation was computed. [2019-09-03 19:19:51,109 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.09 07:19:51 BoogieIcfgContainer [2019-09-03 19:19:51,109 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-09-03 19:19:51,115 INFO L168 Benchmark]: Toolchain (without parser) took 2903.13 ms. Allocated memory was 139.5 MB in the beginning and 277.9 MB in the end (delta: 138.4 MB). Free memory was 85.5 MB in the beginning and 191.1 MB in the end (delta: -105.6 MB). Peak memory consumption was 32.8 MB. Max. memory is 7.1 GB. [2019-09-03 19:19:51,116 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 139.5 MB. Free memory was 104.3 MB in the beginning and 104.1 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. [2019-09-03 19:19:51,118 INFO L168 Benchmark]: CACSL2BoogieTranslator took 394.29 ms. Allocated memory was 139.5 MB in the beginning and 210.2 MB in the end (delta: 70.8 MB). Free memory was 85.3 MB in the beginning and 178.4 MB in the end (delta: -93.1 MB). Peak memory consumption was 35.9 MB. Max. memory is 7.1 GB. [2019-09-03 19:19:51,120 INFO L168 Benchmark]: Boogie Preprocessor took 47.92 ms. Allocated memory is still 210.2 MB. Free memory was 178.4 MB in the beginning and 175.4 MB in the end (delta: 3.0 MB). Peak memory consumption was 3.0 MB. Max. memory is 7.1 GB. [2019-09-03 19:19:51,121 INFO L168 Benchmark]: RCFGBuilder took 365.71 ms. Allocated memory is still 210.2 MB. Free memory was 175.4 MB in the beginning and 161.0 MB in the end (delta: 14.5 MB). Peak memory consumption was 14.5 MB. Max. memory is 7.1 GB. [2019-09-03 19:19:51,128 INFO L168 Benchmark]: TraceAbstraction took 2084.64 ms. Allocated memory was 210.2 MB in the beginning and 277.9 MB in the end (delta: 67.6 MB). Free memory was 160.1 MB in the beginning and 191.1 MB in the end (delta: -31.0 MB). Peak memory consumption was 36.6 MB. Max. memory is 7.1 GB. [2019-09-03 19:19:51,135 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 139.5 MB. Free memory was 104.3 MB in the beginning and 104.1 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 394.29 ms. Allocated memory was 139.5 MB in the beginning and 210.2 MB in the end (delta: 70.8 MB). Free memory was 85.3 MB in the beginning and 178.4 MB in the end (delta: -93.1 MB). Peak memory consumption was 35.9 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 47.92 ms. Allocated memory is still 210.2 MB. Free memory was 178.4 MB in the beginning and 175.4 MB in the end (delta: 3.0 MB). Peak memory consumption was 3.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 365.71 ms. Allocated memory is still 210.2 MB. Free memory was 175.4 MB in the beginning and 161.0 MB in the end (delta: 14.5 MB). Peak memory consumption was 14.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2084.64 ms. Allocated memory was 210.2 MB in the beginning and 277.9 MB in the end (delta: 67.6 MB). Free memory was 160.1 MB in the beginning and 191.1 MB in the end (delta: -31.0 MB). Peak memory consumption was 36.6 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 19]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 10]: Loop Invariant Derived loop invariant: a == 1 - InvariantResult [Line: 11]: Loop Invariant Derived loop invariant: a == 1 - InvariantResult [Line: 12]: Loop Invariant Derived loop invariant: a == 1 - InvariantResult [Line: 6]: Loop Invariant Derived loop invariant: 0 - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 19 locations, 1 error locations. SAFE Result, 2.0s OverallTime, 6 OverallIterations, 8 TraceHistogramMax, 0.5s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 84 SDtfs, 98 SDslu, 145 SDs, 0 SdLazy, 108 SolverSat, 22 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 142 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=44occurred in iteration=5, 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: 0.0s AutomataMinimizationTime, 6 MinimizatonAttempts, 38 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 8 PreInvPairs, 33 NumberOfFragments, 14 HoareAnnotationTreeSize, 8 FomulaSimplifications, 521 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 8 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 0.6s InterpolantComputationTime, 240 NumberOfCodeBlocks, 206 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 230 ConstructedInterpolants, 0 QuantifiedInterpolants, 12918 SizeOfPredicates, 7 NumberOfNonLiveVariables, 326 ConjunctsInSsa, 27 ConjunctsInUnsatCore, 10 InterpolantComputations, 5 PerfectInterpolantSequences, 374/382 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...