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/loop-acceleration/underapprox_1-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-efa34d5 [2019-09-16 16:11:48,514 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-16 16:11:48,516 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-16 16:11:48,528 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-09-16 16:11:48,528 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-09-16 16:11:48,529 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-09-16 16:11:48,530 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-09-16 16:11:48,532 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-09-16 16:11:48,534 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-09-16 16:11:48,535 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-09-16 16:11:48,536 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-09-16 16:11:48,537 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-09-16 16:11:48,537 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-16 16:11:48,539 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-16 16:11:48,539 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-16 16:11:48,541 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-16 16:11:48,542 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-16 16:11:48,543 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-16 16:11:48,544 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-16 16:11:48,546 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-16 16:11:48,548 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-16 16:11:48,549 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-16 16:11:48,550 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-16 16:11:48,551 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-16 16:11:48,553 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-09-16 16:11:48,561 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-16 16:11:48,562 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-16 16:11:48,563 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-16 16:11:48,564 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 [2019-09-16 16:11:48,578 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-16 16:11:48,578 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-16 16:11:48,579 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-09-16 16:11:48,579 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-09-16 16:11:48,579 INFO L138 SettingsManager]: * Use SBE=true [2019-09-16 16:11:48,580 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-16 16:11:48,580 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-16 16:11:48,580 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-09-16 16:11:48,580 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-16 16:11:48,580 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-16 16:11:48,581 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-16 16:11:48,581 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-16 16:11:48,581 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-16 16:11:48,581 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-16 16:11:48,581 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-16 16:11:48,582 INFO L138 SettingsManager]: * Use constant arrays=true [2019-09-16 16:11:48,582 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-16 16:11:48,582 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-16 16:11:48,582 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-16 16:11:48,582 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-09-16 16:11:48,583 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-09-16 16:11:48,583 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-16 16:11:48,583 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-16 16:11:48,583 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-16 16:11:48,583 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-09-16 16:11:48,584 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-09-16 16:11:48,584 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-16 16:11:48,584 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-09-16 16:11:48,584 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-16 16:11:48,619 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-16 16:11:48,632 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-16 16:11:48,635 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-16 16:11:48,637 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-16 16:11:48,637 INFO L275 PluginConnector]: CDTParser initialized [2019-09-16 16:11:48,638 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/underapprox_1-2.c [2019-09-16 16:11:48,718 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6a43c10f2/671d63897d2d4cd4a33e996c17e32a15/FLAGf3854cfce [2019-09-16 16:11:49,189 INFO L306 CDTParser]: Found 1 translation units. [2019-09-16 16:11:49,190 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/underapprox_1-2.c [2019-09-16 16:11:49,197 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6a43c10f2/671d63897d2d4cd4a33e996c17e32a15/FLAGf3854cfce [2019-09-16 16:11:49,579 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6a43c10f2/671d63897d2d4cd4a33e996c17e32a15 [2019-09-16 16:11:49,591 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-16 16:11:49,593 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-16 16:11:49,593 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-16 16:11:49,594 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-16 16:11:49,596 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-16 16:11:49,597 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.09 04:11:49" (1/1) ... [2019-09-16 16:11:49,600 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@21ed8428 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 04:11:49, skipping insertion in model container [2019-09-16 16:11:49,601 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.09 04:11:49" (1/1) ... [2019-09-16 16:11:49,609 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-16 16:11:49,623 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-16 16:11:49,779 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-16 16:11:49,784 INFO L188 MainTranslator]: Completed pre-run [2019-09-16 16:11:49,799 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-16 16:11:49,814 INFO L192 MainTranslator]: Completed translation [2019-09-16 16:11:49,814 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 04:11:49 WrapperNode [2019-09-16 16:11:49,815 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-16 16:11:49,815 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-16 16:11:49,816 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-16 16:11:49,816 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-16 16:11:49,911 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 04:11:49" (1/1) ... [2019-09-16 16:11:49,911 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 04:11:49" (1/1) ... [2019-09-16 16:11:49,915 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 04:11:49" (1/1) ... [2019-09-16 16:11:49,915 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 04:11:49" (1/1) ... [2019-09-16 16:11:49,919 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 04:11:49" (1/1) ... [2019-09-16 16:11:49,924 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 04:11:49" (1/1) ... [2019-09-16 16:11:49,925 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 04:11:49" (1/1) ... [2019-09-16 16:11:49,926 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-16 16:11:49,927 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-16 16:11:49,927 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-16 16:11:49,927 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-16 16:11:49,928 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 04:11:49" (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 [2019-09-16 16:11:49,987 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-16 16:11:49,987 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-16 16:11:49,988 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-09-16 16:11:49,988 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-16 16:11:49,988 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-16 16:11:49,988 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-09-16 16:11:49,988 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-16 16:11:49,988 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-16 16:11:49,988 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-16 16:11:50,152 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-16 16:11:50,153 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-09-16 16:11:50,154 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.09 04:11:50 BoogieIcfgContainer [2019-09-16 16:11:50,154 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-16 16:11:50,155 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-16 16:11:50,155 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-16 16:11:50,158 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-16 16:11:50,159 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.09 04:11:49" (1/3) ... [2019-09-16 16:11:50,160 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3544e727 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.09 04:11:50, skipping insertion in model container [2019-09-16 16:11:50,160 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 04:11:49" (2/3) ... [2019-09-16 16:11:50,160 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3544e727 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.09 04:11:50, skipping insertion in model container [2019-09-16 16:11:50,161 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.09 04:11:50" (3/3) ... [2019-09-16 16:11:50,162 INFO L109 eAbstractionObserver]: Analyzing ICFG underapprox_1-2.c [2019-09-16 16:11:50,170 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-16 16:11:50,177 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-16 16:11:50,193 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-16 16:11:50,225 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2019-09-16 16:11:50,226 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-16 16:11:50,226 INFO L378 AbstractCegarLoop]: Hoare is true [2019-09-16 16:11:50,226 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-16 16:11:50,226 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-16 16:11:50,227 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-16 16:11:50,227 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-16 16:11:50,227 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-16 16:11:50,228 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-16 16:11:50,246 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states. [2019-09-16 16:11:50,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-09-16 16:11:50,251 INFO L399 BasicCegarLoop]: Found error trace [2019-09-16 16:11:50,252 INFO L407 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-16 16:11:50,254 INFO L418 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-16 16:11:50,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-16 16:11:50,260 INFO L82 PathProgramCache]: Analyzing trace with hash 1846144830, now seen corresponding path program 1 times [2019-09-16 16:11:50,262 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-16 16:11:50,263 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-16 16:11:50,322 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 16:11:50,322 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-16 16:11:50,322 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 16:11:50,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-16 16:11:50,595 WARN L191 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 5 [2019-09-16 16:11:50,600 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-16 16:11:50,609 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-16 16:11:50,610 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-16 16:11:50,614 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-16 16:11:50,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-16 16:11:50,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-16 16:11:50,631 INFO L87 Difference]: Start difference. First operand 17 states. Second operand 3 states. [2019-09-16 16:11:50,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-16 16:11:50,685 INFO L93 Difference]: Finished difference Result 29 states and 34 transitions. [2019-09-16 16:11:50,686 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-16 16:11:50,687 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2019-09-16 16:11:50,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-16 16:11:50,695 INFO L225 Difference]: With dead ends: 29 [2019-09-16 16:11:50,696 INFO L226 Difference]: Without dead ends: 12 [2019-09-16 16:11:50,699 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-16 16:11:50,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2019-09-16 16:11:50,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2019-09-16 16:11:50,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2019-09-16 16:11:50,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2019-09-16 16:11:50,736 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2019-09-16 16:11:50,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-16 16:11:50,737 INFO L475 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2019-09-16 16:11:50,737 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-16 16:11:50,737 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2019-09-16 16:11:50,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-09-16 16:11:50,738 INFO L399 BasicCegarLoop]: Found error trace [2019-09-16 16:11:50,738 INFO L407 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-16 16:11:50,739 INFO L418 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-16 16:11:50,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-16 16:11:50,739 INFO L82 PathProgramCache]: Analyzing trace with hash 1432376145, now seen corresponding path program 1 times [2019-09-16 16:11:50,740 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-16 16:11:50,740 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-16 16:11:50,741 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 16:11:50,741 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-16 16:11:50,742 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 16:11:50,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-16 16:11:50,862 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-16 16:11:50,862 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-16 16:11:50,862 INFO L224 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 [2019-09-16 16:11:50,891 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-16 16:11:50,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-16 16:11:50,908 INFO L256 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 5 conjunts are in the unsatisfiable core [2019-09-16 16:11:50,913 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-16 16:11:50,951 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-16 16:11:50,957 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-16 16:11:50,957 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2019-09-16 16:11:50,958 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-16 16:11:50,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-16 16:11:50,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-09-16 16:11:50,960 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 5 states. [2019-09-16 16:11:50,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-16 16:11:50,982 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2019-09-16 16:11:50,983 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-16 16:11:50,983 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2019-09-16 16:11:50,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-16 16:11:50,984 INFO L225 Difference]: With dead ends: 18 [2019-09-16 16:11:50,984 INFO L226 Difference]: Without dead ends: 13 [2019-09-16 16:11:50,986 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-09-16 16:11:50,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2019-09-16 16:11:50,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2019-09-16 16:11:50,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2019-09-16 16:11:50,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2019-09-16 16:11:50,991 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2019-09-16 16:11:50,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-16 16:11:50,991 INFO L475 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2019-09-16 16:11:50,991 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-16 16:11:50,992 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2019-09-16 16:11:50,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-09-16 16:11:50,992 INFO L399 BasicCegarLoop]: Found error trace [2019-09-16 16:11:50,993 INFO L407 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-16 16:11:50,993 INFO L418 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-16 16:11:50,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-16 16:11:50,994 INFO L82 PathProgramCache]: Analyzing trace with hash 1490448798, now seen corresponding path program 2 times [2019-09-16 16:11:50,994 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-16 16:11:50,994 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-16 16:11:50,995 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 16:11:50,996 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-16 16:11:50,996 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 16:11:51,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-16 16:11:51,129 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-16 16:11:51,130 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-16 16:11:51,130 INFO L224 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) [2019-09-16 16:11:51,158 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-16 16:11:51,171 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-16 16:11:51,172 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-16 16:11:51,173 INFO L256 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 7 conjunts are in the unsatisfiable core [2019-09-16 16:11:51,174 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-16 16:11:51,204 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-16 16:11:51,208 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-16 16:11:51,208 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2019-09-16 16:11:51,209 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-16 16:11:51,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-16 16:11:51,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-09-16 16:11:51,210 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 6 states. [2019-09-16 16:11:51,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-16 16:11:51,248 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2019-09-16 16:11:51,249 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-09-16 16:11:51,249 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 12 [2019-09-16 16:11:51,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-16 16:11:51,250 INFO L225 Difference]: With dead ends: 19 [2019-09-16 16:11:51,250 INFO L226 Difference]: Without dead ends: 14 [2019-09-16 16:11:51,251 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-09-16 16:11:51,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2019-09-16 16:11:51,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2019-09-16 16:11:51,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2019-09-16 16:11:51,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2019-09-16 16:11:51,255 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2019-09-16 16:11:51,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-16 16:11:51,256 INFO L475 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2019-09-16 16:11:51,256 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-16 16:11:51,256 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2019-09-16 16:11:51,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-09-16 16:11:51,257 INFO L399 BasicCegarLoop]: Found error trace [2019-09-16 16:11:51,257 INFO L407 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-16 16:11:51,257 INFO L418 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-16 16:11:51,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-16 16:11:51,257 INFO L82 PathProgramCache]: Analyzing trace with hash -1004266255, now seen corresponding path program 3 times [2019-09-16 16:11:51,258 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-16 16:11:51,258 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-16 16:11:51,259 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 16:11:51,259 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-16 16:11:51,259 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 16:11:51,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-16 16:11:51,396 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-16 16:11:51,397 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-16 16:11:51,397 INFO L224 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) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-16 16:11:51,419 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-16 16:11:51,437 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-09-16 16:11:51,437 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-16 16:11:51,438 INFO L256 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 9 conjunts are in the unsatisfiable core [2019-09-16 16:11:51,440 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-16 16:11:51,466 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-16 16:11:51,470 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-16 16:11:51,470 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2019-09-16 16:11:51,470 INFO L454 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-09-16 16:11:51,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-09-16 16:11:51,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-09-16 16:11:51,472 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 7 states. [2019-09-16 16:11:51,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-16 16:11:51,510 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2019-09-16 16:11:51,510 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-09-16 16:11:51,510 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 13 [2019-09-16 16:11:51,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-16 16:11:51,511 INFO L225 Difference]: With dead ends: 20 [2019-09-16 16:11:51,511 INFO L226 Difference]: Without dead ends: 15 [2019-09-16 16:11:51,512 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-09-16 16:11:51,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2019-09-16 16:11:51,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2019-09-16 16:11:51,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2019-09-16 16:11:51,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2019-09-16 16:11:51,517 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2019-09-16 16:11:51,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-16 16:11:51,517 INFO L475 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2019-09-16 16:11:51,517 INFO L476 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-09-16 16:11:51,518 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2019-09-16 16:11:51,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-09-16 16:11:51,518 INFO L399 BasicCegarLoop]: Found error trace [2019-09-16 16:11:51,519 INFO L407 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-16 16:11:51,519 INFO L418 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-16 16:11:51,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-16 16:11:51,519 INFO L82 PathProgramCache]: Analyzing trace with hash -1031021570, now seen corresponding path program 4 times [2019-09-16 16:11:51,520 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-16 16:11:51,520 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-16 16:11:51,521 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 16:11:51,521 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-16 16:11:51,521 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 16:11:51,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-16 16:11:51,655 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-16 16:11:51,656 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-16 16:11:51,656 INFO L224 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 [2019-09-16 16:11:51,675 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-16 16:11:51,690 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-16 16:11:51,691 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-16 16:11:51,692 INFO L256 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 11 conjunts are in the unsatisfiable core [2019-09-16 16:11:51,694 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-16 16:11:51,734 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-16 16:11:51,737 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-16 16:11:51,738 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2019-09-16 16:11:51,738 INFO L454 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-09-16 16:11:51,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-09-16 16:11:51,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2019-09-16 16:11:51,739 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 8 states. [2019-09-16 16:11:51,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-16 16:11:51,805 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2019-09-16 16:11:51,806 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-16 16:11:51,806 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 14 [2019-09-16 16:11:51,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-16 16:11:51,807 INFO L225 Difference]: With dead ends: 21 [2019-09-16 16:11:51,807 INFO L226 Difference]: Without dead ends: 16 [2019-09-16 16:11:51,808 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2019-09-16 16:11:51,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2019-09-16 16:11:51,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2019-09-16 16:11:51,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2019-09-16 16:11:51,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2019-09-16 16:11:51,816 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 14 [2019-09-16 16:11:51,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-16 16:11:51,817 INFO L475 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2019-09-16 16:11:51,817 INFO L476 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-09-16 16:11:51,817 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2019-09-16 16:11:51,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-09-16 16:11:51,818 INFO L399 BasicCegarLoop]: Found error trace [2019-09-16 16:11:51,818 INFO L407 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-16 16:11:51,818 INFO L418 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-16 16:11:51,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-16 16:11:51,819 INFO L82 PathProgramCache]: Analyzing trace with hash -1860436335, now seen corresponding path program 5 times [2019-09-16 16:11:51,819 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-16 16:11:51,819 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-16 16:11:51,822 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 16:11:51,824 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-16 16:11:51,824 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 16:11:51,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-16 16:11:52,076 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-16 16:11:52,077 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-16 16:11:52,077 INFO L224 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) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-16 16:11:52,097 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-16 16:11:52,113 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-09-16 16:11:52,113 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-16 16:11:52,114 INFO L256 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 13 conjunts are in the unsatisfiable core [2019-09-16 16:11:52,116 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-16 16:11:52,168 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (6)] Exception during sending of exit command (exit): Broken pipe [2019-09-16 16:11:52,172 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-16 16:11:52,172 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2019-09-16 16:11:52,173 INFO L454 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-09-16 16:11:52,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-09-16 16:11:52,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2019-09-16 16:11:52,174 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 9 states. [2019-09-16 16:11:52,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-16 16:11:52,220 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2019-09-16 16:11:52,220 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-09-16 16:11:52,221 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2019-09-16 16:11:52,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-16 16:11:52,221 INFO L225 Difference]: With dead ends: 22 [2019-09-16 16:11:52,222 INFO L226 Difference]: Without dead ends: 17 [2019-09-16 16:11:52,222 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2019-09-16 16:11:52,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2019-09-16 16:11:52,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2019-09-16 16:11:52,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-09-16 16:11:52,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2019-09-16 16:11:52,227 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 15 [2019-09-16 16:11:52,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-16 16:11:52,227 INFO L475 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2019-09-16 16:11:52,227 INFO L476 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-09-16 16:11:52,227 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2019-09-16 16:11:52,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-09-16 16:11:52,228 INFO L399 BasicCegarLoop]: Found error trace [2019-09-16 16:11:52,228 INFO L407 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-16 16:11:52,229 INFO L418 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-16 16:11:52,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-16 16:11:52,229 INFO L82 PathProgramCache]: Analyzing trace with hash -1802490274, now seen corresponding path program 6 times [2019-09-16 16:11:52,229 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-16 16:11:52,229 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-16 16:11:52,230 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 16:11:52,231 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-16 16:11:52,231 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 16:11:52,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-16 16:11:54,368 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (* 178956971 c_main_~y~0))) (<= (* 268435456 (div (+ .cse0 357913939) 268435456)) (+ .cse0 89478484))) is different from false [2019-09-16 16:11:56,382 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (* 178956971 c_main_~y~0))) (<= (* 536870912 (div (+ .cse0 715827879) 536870912)) (+ .cse0 178956968))) is different from false [2019-09-16 16:11:58,392 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (* 715827883 c_main_~y~0))) (<= (* 1073741824 (div (+ .cse0 1431655759) 1073741824)) (+ .cse0 357913936))) is different from false [2019-09-16 16:12:00,405 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (* 715827883 c_main_~y~0))) (<= (* 2147483648 (div (+ .cse0 2863311519) 2147483648)) (+ .cse0 715827872))) is different from false [2019-09-16 16:12:00,568 WARN L191 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 18 [2019-09-16 16:12:00,585 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 18 not checked. [2019-09-16 16:12:00,586 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-16 16:12:00,586 INFO L224 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) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-16 16:12:00,603 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-16 16:12:00,623 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-09-16 16:12:00,624 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-16 16:12:00,625 INFO L256 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 20 conjunts are in the unsatisfiable core [2019-09-16 16:12:00,626 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-16 16:12:05,470 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-16 16:12:05,472 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-16 16:12:05,475 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-16 16:12:05,476 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-16 16:12:05,478 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-16 16:12:28,267 WARN L191 SmtUtils]: Spent 9.04 s on a formula simplification. DAG size of input: 64 DAG size of output: 46 [2019-09-16 16:12:48,207 WARN L191 SmtUtils]: Spent 4.87 s on a formula simplification that was a NOOP. DAG size: 74 [2019-09-16 16:12:48,267 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-16 16:12:48,270 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-16 16:12:48,271 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2019-09-16 16:12:48,271 INFO L454 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-09-16 16:12:48,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-09-16 16:12:48,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=166, Unknown=15, NotChecked=116, Total=342 [2019-09-16 16:12:48,272 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 19 states. [2019-09-16 16:13:44,808 WARN L191 SmtUtils]: Spent 20.75 s on a formula simplification that was a NOOP. DAG size: 85 [2019-09-16 16:13:47,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-16 16:13:47,140 INFO L93 Difference]: Finished difference Result 27 states and 28 transitions. [2019-09-16 16:13:47,140 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-09-16 16:13:47,141 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 16 [2019-09-16 16:13:47,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-16 16:13:47,141 INFO L225 Difference]: With dead ends: 27 [2019-09-16 16:13:47,141 INFO L226 Difference]: Without dead ends: 19 [2019-09-16 16:13:47,142 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 8 SyntacticMatches, 5 SemanticMatches, 19 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 76.9s TimeCoverageRelationStatistics Valid=56, Invalid=217, Unknown=15, NotChecked=132, Total=420 [2019-09-16 16:13:47,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2019-09-16 16:13:47,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2019-09-16 16:13:47,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2019-09-16 16:13:47,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2019-09-16 16:13:47,148 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 16 [2019-09-16 16:13:47,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-16 16:13:47,148 INFO L475 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2019-09-16 16:13:47,148 INFO L476 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-09-16 16:13:47,149 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2019-09-16 16:13:47,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-09-16 16:13:47,149 INFO L399 BasicCegarLoop]: Found error trace [2019-09-16 16:13:47,149 INFO L407 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-16 16:13:47,150 INFO L418 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-16 16:13:47,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-16 16:13:47,150 INFO L82 PathProgramCache]: Analyzing trace with hash -154572610, now seen corresponding path program 7 times [2019-09-16 16:13:47,150 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-16 16:13:47,150 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-16 16:13:47,152 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 16:13:47,152 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-16 16:13:47,152 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 16:13:47,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-16 16:13:47,263 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 14 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-09-16 16:13:47,264 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-16 16:13:47,264 INFO L224 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) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-16 16:13:47,276 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-16 16:13:47,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-16 16:13:47,289 INFO L256 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 15 conjunts are in the unsatisfiable core [2019-09-16 16:13:47,290 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-16 16:13:47,317 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 14 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-09-16 16:13:47,321 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-16 16:13:47,321 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2019-09-16 16:13:47,322 INFO L454 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-09-16 16:13:47,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-09-16 16:13:47,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2019-09-16 16:13:47,322 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 10 states. [2019-09-16 16:13:47,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-16 16:13:47,379 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2019-09-16 16:13:47,381 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-09-16 16:13:47,381 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 18 [2019-09-16 16:13:47,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-16 16:13:47,382 INFO L225 Difference]: With dead ends: 19 [2019-09-16 16:13:47,382 INFO L226 Difference]: Without dead ends: 0 [2019-09-16 16:13:47,383 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2019-09-16 16:13:47,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-09-16 16:13:47,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-09-16 16:13:47,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-09-16 16:13:47,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-09-16 16:13:47,384 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 18 [2019-09-16 16:13:47,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-16 16:13:47,384 INFO L475 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-09-16 16:13:47,385 INFO L476 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-09-16 16:13:47,385 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-09-16 16:13:47,385 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-09-16 16:13:47,390 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2019-09-16 16:13:47,867 WARN L191 SmtUtils]: Spent 365.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2019-09-16 16:13:47,885 INFO L446 ceAbstractionStarter]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2019-09-16 16:13:47,885 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2019-09-16 16:13:47,885 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2019-09-16 16:13:47,885 INFO L446 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2019-09-16 16:13:47,885 INFO L446 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2019-09-16 16:13:47,886 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2019-09-16 16:13:47,886 INFO L446 ceAbstractionStarter]: At program point mainENTRY(lines 10 20) the Hoare annotation is: true [2019-09-16 16:13:47,886 INFO L443 ceAbstractionStarter]: For program point mainEXIT(lines 10 20) no Hoare annotation was computed. [2019-09-16 16:13:47,886 INFO L443 ceAbstractionStarter]: For program point mainFINAL(lines 10 20) no Hoare annotation was computed. [2019-09-16 16:13:47,887 INFO L439 ceAbstractionStarter]: At program point L14-2(lines 14 17) the Hoare annotation is: (let ((.cse16 (div (- main_~y~0) (- 2)))) (let ((.cse7 (div main_~y~0 2)) (.cse4 (div .cse16 2))) (let ((.cse15 (div (- .cse4) (- 2))) (.cse17 (div (- .cse7) (- 2)))) (let ((.cse0 (= (mod main_~y~0 2) 0)) (.cse2 (= (mod .cse7 (- 2)) 0)) (.cse3 (= 0 (mod .cse17 2))) (.cse1 (div .cse17 2)) (.cse5 (= (mod main_~y~0 (- 2)) 0)) (.cse8 (= 0 (mod .cse15 2))) (.cse9 (= (mod .cse4 (- 2)) 0)) (.cse6 (= (mod .cse16 2) 0)) (.cse10 (div .cse15 2))) (or (and .cse0 (<= main_~x~0 3) (<= .cse1 1) .cse2 (<= 3 main_~x~0) (<= 1 .cse1) .cse3) (and (<= 1 .cse4) .cse5 (<= 2 main_~x~0) .cse6 (<= main_~x~0 2) (<= .cse4 1)) (and (<= 1 main_~y~0) (<= main_~x~0 0) (<= main_~y~0 1) (<= 0 main_~x~0)) (and (<= .cse7 1) .cse0 (<= main_~x~0 1) (<= 1 main_~x~0) (<= 1 .cse7)) (let ((.cse11 (div (- .cse10) (- 2)))) (let ((.cse12 (div .cse11 2))) (and .cse5 .cse8 .cse9 (= (mod .cse10 (- 2)) 0) (<= main_~x~0 6) (= (mod .cse11 2) 0) .cse6 (<= 6 main_~x~0) (<= .cse12 1) (<= 1 .cse12)))) (let ((.cse13 (div (- .cse1) (- 2)))) (let ((.cse14 (div .cse13 2))) (and (= (mod .cse13 2) 0) .cse0 (= (mod .cse1 (- 2)) 0) (<= 1 .cse14) (<= 5 main_~x~0) .cse2 .cse3 (<= .cse14 1) (<= main_~x~0 5)))) (and (<= .cse10 1) .cse5 .cse8 (<= 4 main_~x~0) .cse9 .cse6 (<= main_~x~0 4) (<= 1 .cse10))))))) [2019-09-16 16:13:47,887 INFO L439 ceAbstractionStarter]: At program point L14-3(lines 14 17) the Hoare annotation is: (not (= main_~y~0 (let ((.cse0 (div main_~y~0 4294967296))) (let ((.cse1 (* (- 4294967296) .cse0))) (let ((.cse2 (div (+ .cse1 main_~y~0) 3))) (+ (* 4294967296 .cse0) (* 4294967296 (div (+ .cse1 main_~y~0 (* (- 3) .cse2)) 4294967296)) (* 3 .cse2))))))) [2019-09-16 16:13:47,890 INFO L446 ceAbstractionStarter]: At program point __VERIFIER_assertENTRY(lines 3 8) the Hoare annotation is: true [2019-09-16 16:13:47,890 INFO L443 ceAbstractionStarter]: For program point __VERIFIER_assertEXIT(lines 3 8) no Hoare annotation was computed. [2019-09-16 16:13:47,890 INFO L443 ceAbstractionStarter]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 5) no Hoare annotation was computed. [2019-09-16 16:13:47,890 INFO L443 ceAbstractionStarter]: For program point L5(line 5) no Hoare annotation was computed. [2019-09-16 16:13:47,890 INFO L443 ceAbstractionStarter]: For program point L4(lines 4 6) no Hoare annotation was computed. [2019-09-16 16:13:47,891 INFO L443 ceAbstractionStarter]: For program point L4-2(lines 3 8) no Hoare annotation was computed. [2019-09-16 16:13:47,925 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.09 04:13:47 BoogieIcfgContainer [2019-09-16 16:13:47,926 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-09-16 16:13:47,928 INFO L168 Benchmark]: Toolchain (without parser) took 118334.73 ms. Allocated memory was 131.1 MB in the beginning and 266.9 MB in the end (delta: 135.8 MB). Free memory was 85.5 MB in the beginning and 162.6 MB in the end (delta: -77.1 MB). Peak memory consumption was 58.7 MB. Max. memory is 7.1 GB. [2019-09-16 16:13:47,929 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 131.1 MB. Free memory was 104.0 MB in the beginning and 103.8 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. [2019-09-16 16:13:47,929 INFO L168 Benchmark]: CACSL2BoogieTranslator took 221.61 ms. Allocated memory is still 131.1 MB. Free memory was 85.0 MB in the beginning and 75.9 MB in the end (delta: 9.1 MB). Peak memory consumption was 9.1 MB. Max. memory is 7.1 GB. [2019-09-16 16:13:47,930 INFO L168 Benchmark]: Boogie Preprocessor took 110.98 ms. Allocated memory was 131.1 MB in the beginning and 198.2 MB in the end (delta: 67.1 MB). Free memory was 75.9 MB in the beginning and 174.6 MB in the end (delta: -98.7 MB). Peak memory consumption was 15.9 MB. Max. memory is 7.1 GB. [2019-09-16 16:13:47,931 INFO L168 Benchmark]: RCFGBuilder took 227.36 ms. Allocated memory is still 198.2 MB. Free memory was 174.6 MB in the beginning and 163.7 MB in the end (delta: 11.0 MB). Peak memory consumption was 11.0 MB. Max. memory is 7.1 GB. [2019-09-16 16:13:47,932 INFO L168 Benchmark]: TraceAbstraction took 117770.81 ms. Allocated memory was 198.2 MB in the beginning and 266.9 MB in the end (delta: 68.7 MB). Free memory was 163.7 MB in the beginning and 162.6 MB in the end (delta: 1.1 MB). Peak memory consumption was 69.8 MB. Max. memory is 7.1 GB. [2019-09-16 16:13:47,937 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 131.1 MB. Free memory was 104.0 MB in the beginning and 103.8 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 221.61 ms. Allocated memory is still 131.1 MB. Free memory was 85.0 MB in the beginning and 75.9 MB in the end (delta: 9.1 MB). Peak memory consumption was 9.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 110.98 ms. Allocated memory was 131.1 MB in the beginning and 198.2 MB in the end (delta: 67.1 MB). Free memory was 75.9 MB in the beginning and 174.6 MB in the end (delta: -98.7 MB). Peak memory consumption was 15.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 227.36 ms. Allocated memory is still 198.2 MB. Free memory was 174.6 MB in the beginning and 163.7 MB in the end (delta: 11.0 MB). Peak memory consumption was 11.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 117770.81 ms. Allocated memory was 198.2 MB in the beginning and 266.9 MB in the end (delta: 68.7 MB). Free memory was 163.7 MB in the beginning and 162.6 MB in the end (delta: 1.1 MB). Peak memory consumption was 69.8 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 5]: 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: 14]: Loop Invariant Derived loop invariant: (((((((((((y % 2 == 0 && x <= 3) && -(y / 2) / -2 / 2 <= 1) && y / 2 % -2 == 0) && 3 <= x) && 1 <= -(y / 2) / -2 / 2) && 0 == -(y / 2) / -2 % 2) || (((((1 <= -y / -2 / 2 && y % -2 == 0) && 2 <= x) && -y / -2 % 2 == 0) && x <= 2) && -y / -2 / 2 <= 1)) || (((1 <= y && x <= 0) && y <= 1) && 0 <= x)) || ((((y / 2 <= 1 && y % 2 == 0) && x <= 1) && 1 <= x) && 1 <= y / 2)) || (((((((((y % -2 == 0 && 0 == -(-y / -2 / 2) / -2 % 2) && -y / -2 / 2 % -2 == 0) && -(-y / -2 / 2) / -2 / 2 % -2 == 0) && x <= 6) && -(-(-y / -2 / 2) / -2 / 2) / -2 % 2 == 0) && -y / -2 % 2 == 0) && 6 <= x) && -(-(-y / -2 / 2) / -2 / 2) / -2 / 2 <= 1) && 1 <= -(-(-y / -2 / 2) / -2 / 2) / -2 / 2)) || ((((((((-(-(y / 2) / -2 / 2) / -2 % 2 == 0 && y % 2 == 0) && -(y / 2) / -2 / 2 % -2 == 0) && 1 <= -(-(y / 2) / -2 / 2) / -2 / 2) && 5 <= x) && y / 2 % -2 == 0) && 0 == -(y / 2) / -2 % 2) && -(-(y / 2) / -2 / 2) / -2 / 2 <= 1) && x <= 5)) || (((((((-(-y / -2 / 2) / -2 / 2 <= 1 && y % -2 == 0) && 0 == -(-y / -2 / 2) / -2 % 2) && 4 <= x) && -y / -2 / 2 % -2 == 0) && -y / -2 % 2 == 0) && x <= 4) && 1 <= -(-y / -2 / 2) / -2 / 2) - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 17 locations, 1 error locations. SAFE Result, 117.6s OverallTime, 8 OverallIterations, 8 TraceHistogramMax, 59.2s AutomataDifference, 0.0s DeadEndRemovalTime, 0.4s HoareAnnotationTime, HoareTripleCheckerStatistics: 80 SDtfs, 2 SDslu, 304 SDs, 0 SdLazy, 253 SolverSat, 22 SolverUnsat, 18 SolverUnknown, 0 SolverNotchecked, 36.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 151 GetRequests, 87 SyntacticMatches, 11 SemanticMatches, 53 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 77.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=19occurred in iteration=7, 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, 8 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 15 PreInvPairs, 24 NumberOfFragments, 435 HoareAnnotationTreeSize, 15 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 654 FormulaSimplificationTreeSizeReductionInter, 0.4s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 57.1s InterpolantComputationTime, 208 NumberOfCodeBlocks, 208 NumberOfCodeBlocksAsserted, 25 NumberOfCheckSat, 193 ConstructedInterpolants, 2 QuantifiedInterpolants, 24290 SizeOfPredicates, 7 NumberOfNonLiveVariables, 313 ConjunctsInSsa, 80 ConjunctsInUnsatCore, 15 InterpolantComputations, 1 PerfectInterpolantSequences, 30/184 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...