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_2-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-0883e75 [2019-09-05 11:53:15,652 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-05 11:53:15,654 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-05 11:53:15,671 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-09-05 11:53:15,672 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-09-05 11:53:15,673 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-09-05 11:53:15,674 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-09-05 11:53:15,676 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-09-05 11:53:15,677 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-09-05 11:53:15,678 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-09-05 11:53:15,679 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-09-05 11:53:15,680 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2019-09-05 11:53:15,702 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-05 11:53:15,703 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-05 11:53:15,704 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-05 11:53:15,705 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 [2019-09-05 11:53:15,718 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-05 11:53:15,719 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-05 11:53:15,720 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-09-05 11:53:15,720 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-09-05 11:53:15,720 INFO L138 SettingsManager]: * Use SBE=true [2019-09-05 11:53:15,720 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-05 11:53:15,721 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-05 11:53:15,721 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-09-05 11:53:15,721 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-05 11:53:15,721 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-05 11:53:15,721 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-05 11:53:15,722 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-05 11:53:15,722 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-05 11:53:15,722 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-05 11:53:15,722 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-05 11:53:15,722 INFO L138 SettingsManager]: * Use constant arrays=true [2019-09-05 11:53:15,723 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-05 11:53:15,723 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-05 11:53:15,723 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-05 11:53:15,723 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-09-05 11:53:15,723 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-09-05 11:53:15,724 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-05 11:53:15,724 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-05 11:53:15,724 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-05 11:53:15,724 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-09-05 11:53:15,724 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-09-05 11:53:15,725 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-05 11:53:15,725 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-05 11:53:15,725 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-09-05 11:53:15,752 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-05 11:53:15,764 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-05 11:53:15,767 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-05 11:53:15,768 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-05 11:53:15,769 INFO L275 PluginConnector]: CDTParser initialized [2019-09-05 11:53:15,769 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/underapprox_2-1.c [2019-09-05 11:53:15,827 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4f7f199fc/d16ca1330ed343e9b834434c75aa97d8/FLAG8b9c3d7ba [2019-09-05 11:53:16,222 INFO L306 CDTParser]: Found 1 translation units. [2019-09-05 11:53:16,222 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/underapprox_2-1.c [2019-09-05 11:53:16,228 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4f7f199fc/d16ca1330ed343e9b834434c75aa97d8/FLAG8b9c3d7ba [2019-09-05 11:53:16,653 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4f7f199fc/d16ca1330ed343e9b834434c75aa97d8 [2019-09-05 11:53:16,663 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-05 11:53:16,664 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-05 11:53:16,665 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-05 11:53:16,665 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-05 11:53:16,670 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-05 11:53:16,671 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.09 11:53:16" (1/1) ... [2019-09-05 11:53:16,674 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2d21465a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 11:53:16, skipping insertion in model container [2019-09-05 11:53:16,674 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.09 11:53:16" (1/1) ... [2019-09-05 11:53:16,681 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-05 11:53:16,696 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-05 11:53:16,868 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-05 11:53:16,873 INFO L188 MainTranslator]: Completed pre-run [2019-09-05 11:53:16,892 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-05 11:53:16,909 INFO L192 MainTranslator]: Completed translation [2019-09-05 11:53:16,910 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 11:53:16 WrapperNode [2019-09-05 11:53:16,910 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-05 11:53:16,911 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-05 11:53:16,911 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-05 11:53:16,911 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-05 11:53:16,997 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 11:53:16" (1/1) ... [2019-09-05 11:53:16,997 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 11:53:16" (1/1) ... [2019-09-05 11:53:17,002 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 11:53:16" (1/1) ... [2019-09-05 11:53:17,002 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 11:53:16" (1/1) ... [2019-09-05 11:53:17,008 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 11:53:16" (1/1) ... [2019-09-05 11:53:17,012 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 11:53:16" (1/1) ... [2019-09-05 11:53:17,013 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 11:53:16" (1/1) ... [2019-09-05 11:53:17,014 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-05 11:53:17,015 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-05 11:53:17,015 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-05 11:53:17,015 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-05 11:53:17,016 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 11:53:16" (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 [2019-09-05 11:53:17,071 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-05 11:53:17,071 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-05 11:53:17,071 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-09-05 11:53:17,071 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-05 11:53:17,072 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-05 11:53:17,072 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-09-05 11:53:17,072 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-05 11:53:17,072 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-05 11:53:17,072 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-05 11:53:17,217 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-05 11:53:17,217 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-09-05 11:53:17,218 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.09 11:53:17 BoogieIcfgContainer [2019-09-05 11:53:17,219 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-05 11:53:17,220 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-05 11:53:17,220 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-05 11:53:17,223 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-05 11:53:17,223 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.09 11:53:16" (1/3) ... [2019-09-05 11:53:17,224 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@88feb0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.09 11:53:17, skipping insertion in model container [2019-09-05 11:53:17,224 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 11:53:16" (2/3) ... [2019-09-05 11:53:17,224 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@88feb0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.09 11:53:17, skipping insertion in model container [2019-09-05 11:53:17,225 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.09 11:53:17" (3/3) ... [2019-09-05 11:53:17,226 INFO L109 eAbstractionObserver]: Analyzing ICFG underapprox_2-1.c [2019-09-05 11:53:17,235 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-05 11:53:17,240 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-05 11:53:17,255 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-05 11:53:17,291 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2019-09-05 11:53:17,292 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-05 11:53:17,292 INFO L378 AbstractCegarLoop]: Hoare is true [2019-09-05 11:53:17,292 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-05 11:53:17,292 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-05 11:53:17,292 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-05 11:53:17,292 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-05 11:53:17,292 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-05 11:53:17,293 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-05 11:53:17,308 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states. [2019-09-05 11:53:17,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-09-05 11:53:17,313 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 11:53:17,313 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 11:53:17,315 INFO L418 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 11:53:17,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 11:53:17,319 INFO L82 PathProgramCache]: Analyzing trace with hash 1846144830, now seen corresponding path program 1 times [2019-09-05 11:53:17,321 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 11:53:17,321 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 11:53:17,357 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 11:53:17,357 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 11:53:17,357 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 11:53:17,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 11:53:17,543 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 11:53:17,546 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-05 11:53:17,555 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-09-05 11:53:17,564 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-05 11:53:17,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-05 11:53:17,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-09-05 11:53:17,600 INFO L87 Difference]: Start difference. First operand 17 states. Second operand 5 states. [2019-09-05 11:53:17,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 11:53:17,644 INFO L93 Difference]: Finished difference Result 29 states and 34 transitions. [2019-09-05 11:53:17,644 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-05 11:53:17,646 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2019-09-05 11:53:17,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 11:53:17,653 INFO L225 Difference]: With dead ends: 29 [2019-09-05 11:53:17,654 INFO L226 Difference]: Without dead ends: 12 [2019-09-05 11:53:17,657 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-09-05 11:53:17,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2019-09-05 11:53:17,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2019-09-05 11:53:17,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2019-09-05 11:53:17,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2019-09-05 11:53:17,698 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2019-09-05 11:53:17,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 11:53:17,699 INFO L475 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2019-09-05 11:53:17,699 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-05 11:53:17,699 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2019-09-05 11:53:17,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-09-05 11:53:17,700 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 11:53:17,700 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 11:53:17,700 INFO L418 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 11:53:17,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 11:53:17,701 INFO L82 PathProgramCache]: Analyzing trace with hash 1432376145, now seen corresponding path program 1 times [2019-09-05 11:53:17,701 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 11:53:17,701 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 11:53:17,702 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 11:53:17,702 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 11:53:17,702 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 11:53:17,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 11:53:17,807 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 11:53:17,807 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-05 11:53:17,807 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 [2019-09-05 11:53:17,826 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 11:53:17,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 11:53:17,843 INFO L256 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 11 conjunts are in the unsatisfiable core [2019-09-05 11:53:17,849 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 11:53:17,888 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (2)] Exception during sending of exit command (exit): Broken pipe [2019-09-05 11:53:17,893 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-05 11:53:17,894 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4] total 7 [2019-09-05 11:53:17,894 INFO L454 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-09-05 11:53:17,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-09-05 11:53:17,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-09-05 11:53:17,896 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 7 states. [2019-09-05 11:53:17,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 11:53:17,934 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2019-09-05 11:53:17,935 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-05 11:53:17,935 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2019-09-05 11:53:17,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 11:53:17,936 INFO L225 Difference]: With dead ends: 18 [2019-09-05 11:53:17,937 INFO L226 Difference]: Without dead ends: 13 [2019-09-05 11:53:17,938 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 9 SyntacticMatches, 3 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-09-05 11:53:17,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2019-09-05 11:53:17,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2019-09-05 11:53:17,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2019-09-05 11:53:17,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2019-09-05 11:53:17,946 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2019-09-05 11:53:17,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 11:53:17,946 INFO L475 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2019-09-05 11:53:17,946 INFO L476 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-09-05 11:53:17,946 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2019-09-05 11:53:17,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-09-05 11:53:17,947 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 11:53:17,947 INFO L399 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 11:53:17,947 INFO L418 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 11:53:17,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 11:53:17,948 INFO L82 PathProgramCache]: Analyzing trace with hash 1490448798, now seen corresponding path program 2 times [2019-09-05 11:53:17,948 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 11:53:17,948 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 11:53:17,949 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 11:53:17,950 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 11:53:17,950 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 11:53:17,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 11:53:18,070 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 11:53:18,070 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-05 11:53:18,070 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) [2019-09-05 11:53:18,084 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 [2019-09-05 11:53:18,098 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-05 11:53:18,099 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 11:53:18,100 INFO L256 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 13 conjunts are in the unsatisfiable core [2019-09-05 11:53:18,101 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 11:53:18,130 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 11:53:18,134 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-05 11:53:18,134 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 8 [2019-09-05 11:53:18,135 INFO L454 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-09-05 11:53:18,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-09-05 11:53:18,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2019-09-05 11:53:18,136 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 8 states. [2019-09-05 11:53:18,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 11:53:18,171 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2019-09-05 11:53:18,171 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-09-05 11:53:18,172 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2019-09-05 11:53:18,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 11:53:18,172 INFO L225 Difference]: With dead ends: 19 [2019-09-05 11:53:18,173 INFO L226 Difference]: Without dead ends: 14 [2019-09-05 11:53:18,173 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 10 SyntacticMatches, 3 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2019-09-05 11:53:18,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2019-09-05 11:53:18,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2019-09-05 11:53:18,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2019-09-05 11:53:18,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2019-09-05 11:53:18,178 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2019-09-05 11:53:18,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 11:53:18,179 INFO L475 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2019-09-05 11:53:18,179 INFO L476 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-09-05 11:53:18,179 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2019-09-05 11:53:18,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-09-05 11:53:18,180 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 11:53:18,180 INFO L399 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 11:53:18,180 INFO L418 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 11:53:18,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 11:53:18,181 INFO L82 PathProgramCache]: Analyzing trace with hash -1004266255, now seen corresponding path program 3 times [2019-09-05 11:53:18,181 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 11:53:18,181 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 11:53:18,182 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 11:53:18,182 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 11:53:18,182 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 11:53:18,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 11:53:18,304 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 11:53:18,304 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-05 11:53:18,304 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) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-05 11:53:18,318 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-05 11:53:18,332 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-09-05 11:53:18,332 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 11:53:18,333 INFO L256 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 15 conjunts are in the unsatisfiable core [2019-09-05 11:53:18,335 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 11:53:18,366 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 11:53:18,370 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-05 11:53:18,370 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 9 [2019-09-05 11:53:18,370 INFO L454 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-09-05 11:53:18,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-09-05 11:53:18,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2019-09-05 11:53:18,371 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 9 states. [2019-09-05 11:53:18,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 11:53:18,419 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2019-09-05 11:53:18,419 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-09-05 11:53:18,419 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-09-05 11:53:18,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 11:53:18,420 INFO L225 Difference]: With dead ends: 20 [2019-09-05 11:53:18,420 INFO L226 Difference]: Without dead ends: 15 [2019-09-05 11:53:18,421 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2019-09-05 11:53:18,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2019-09-05 11:53:18,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2019-09-05 11:53:18,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2019-09-05 11:53:18,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2019-09-05 11:53:18,425 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2019-09-05 11:53:18,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 11:53:18,426 INFO L475 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2019-09-05 11:53:18,426 INFO L476 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-09-05 11:53:18,426 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2019-09-05 11:53:18,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-09-05 11:53:18,427 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 11:53:18,427 INFO L399 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 11:53:18,427 INFO L418 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 11:53:18,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 11:53:18,428 INFO L82 PathProgramCache]: Analyzing trace with hash -1031021570, now seen corresponding path program 4 times [2019-09-05 11:53:18,428 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 11:53:18,428 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 11:53:18,429 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 11:53:18,429 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 11:53:18,430 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 11:53:18,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 11:53:18,574 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 11:53:18,574 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-05 11:53:18,575 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 [2019-09-05 11:53:18,596 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-05 11:53:18,606 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-05 11:53:18,606 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 11:53:18,607 INFO L256 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 17 conjunts are in the unsatisfiable core [2019-09-05 11:53:18,609 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 11:53:18,631 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 11:53:18,634 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-05 11:53:18,634 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 10 [2019-09-05 11:53:18,635 INFO L454 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-09-05 11:53:18,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-09-05 11:53:18,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2019-09-05 11:53:18,636 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 10 states. [2019-09-05 11:53:18,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 11:53:18,690 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2019-09-05 11:53:18,690 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-05 11:53:18,691 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-09-05 11:53:18,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 11:53:18,691 INFO L225 Difference]: With dead ends: 21 [2019-09-05 11:53:18,691 INFO L226 Difference]: Without dead ends: 16 [2019-09-05 11:53:18,692 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2019-09-05 11:53:18,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2019-09-05 11:53:18,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2019-09-05 11:53:18,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2019-09-05 11:53:18,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2019-09-05 11:53:18,696 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 14 [2019-09-05 11:53:18,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 11:53:18,696 INFO L475 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2019-09-05 11:53:18,696 INFO L476 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-09-05 11:53:18,696 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2019-09-05 11:53:18,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-09-05 11:53:18,697 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 11:53:18,697 INFO L399 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 11:53:18,697 INFO L418 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 11:53:18,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 11:53:18,698 INFO L82 PathProgramCache]: Analyzing trace with hash -1860436335, now seen corresponding path program 5 times [2019-09-05 11:53:18,698 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 11:53:18,698 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 11:53:18,699 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 11:53:18,699 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 11:53:18,699 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 11:53:18,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 11:53:18,838 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 11:53:18,838 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-05 11:53:18,839 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-05 11:53:18,852 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-05 11:53:18,869 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-09-05 11:53:18,869 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 11:53:18,870 INFO L256 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 19 conjunts are in the unsatisfiable core [2019-09-05 11:53:18,871 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 11:53:18,897 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 11:53:18,901 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-05 11:53:18,901 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 11 [2019-09-05 11:53:18,902 INFO L454 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-09-05 11:53:18,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-09-05 11:53:18,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2019-09-05 11:53:18,903 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 11 states. [2019-09-05 11:53:18,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 11:53:18,972 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2019-09-05 11:53:18,972 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-09-05 11:53:18,973 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2019-09-05 11:53:18,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 11:53:18,973 INFO L225 Difference]: With dead ends: 22 [2019-09-05 11:53:18,973 INFO L226 Difference]: Without dead ends: 17 [2019-09-05 11:53:18,974 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2019-09-05 11:53:18,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2019-09-05 11:53:18,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2019-09-05 11:53:18,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-09-05 11:53:18,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2019-09-05 11:53:18,978 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 15 [2019-09-05 11:53:18,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 11:53:18,978 INFO L475 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2019-09-05 11:53:18,979 INFO L476 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-09-05 11:53:18,979 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2019-09-05 11:53:18,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-09-05 11:53:18,979 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 11:53:18,979 INFO L399 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 11:53:18,980 INFO L418 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 11:53:18,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 11:53:18,980 INFO L82 PathProgramCache]: Analyzing trace with hash -1802490274, now seen corresponding path program 6 times [2019-09-05 11:53:18,980 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 11:53:18,980 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 11:53:18,981 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 11:53:18,981 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 11:53:18,981 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 11:53:18,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-09-05 11:53:19,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-09-05 11:53:19,044 INFO L466 BasicCegarLoop]: Counterexample might be feasible [2019-09-05 11:53:19,070 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.09 11:53:19 BoogieIcfgContainer [2019-09-05 11:53:19,070 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-09-05 11:53:19,075 INFO L168 Benchmark]: Toolchain (without parser) took 2407.13 ms. Allocated memory was 131.6 MB in the beginning and 219.2 MB in the end (delta: 87.6 MB). Free memory was 86.4 MB in the beginning and 131.6 MB in the end (delta: -45.1 MB). Peak memory consumption was 42.4 MB. Max. memory is 7.1 GB. [2019-09-05 11:53:19,076 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 131.6 MB. Free memory was 104.4 MB in the beginning and 104.2 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. [2019-09-05 11:53:19,077 INFO L168 Benchmark]: CACSL2BoogieTranslator took 245.45 ms. Allocated memory is still 131.6 MB. Free memory was 86.0 MB in the beginning and 77.1 MB in the end (delta: 8.9 MB). Peak memory consumption was 8.9 MB. Max. memory is 7.1 GB. [2019-09-05 11:53:19,079 INFO L168 Benchmark]: Boogie Preprocessor took 103.73 ms. Allocated memory was 131.6 MB in the beginning and 197.7 MB in the end (delta: 66.1 MB). Free memory was 77.1 MB in the beginning and 174.5 MB in the end (delta: -97.4 MB). Peak memory consumption was 16.3 MB. Max. memory is 7.1 GB. [2019-09-05 11:53:19,079 INFO L168 Benchmark]: RCFGBuilder took 203.90 ms. Allocated memory is still 197.7 MB. Free memory was 174.5 MB in the beginning and 164.1 MB in the end (delta: 10.4 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. [2019-09-05 11:53:19,085 INFO L168 Benchmark]: TraceAbstraction took 1850.51 ms. Allocated memory was 197.7 MB in the beginning and 219.2 MB in the end (delta: 21.5 MB). Free memory was 163.5 MB in the beginning and 131.6 MB in the end (delta: 31.9 MB). Peak memory consumption was 53.4 MB. Max. memory is 7.1 GB. [2019-09-05 11:53:19,092 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 131.6 MB. Free memory was 104.4 MB in the beginning and 104.2 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 245.45 ms. Allocated memory is still 131.6 MB. Free memory was 86.0 MB in the beginning and 77.1 MB in the end (delta: 8.9 MB). Peak memory consumption was 8.9 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 103.73 ms. Allocated memory was 131.6 MB in the beginning and 197.7 MB in the end (delta: 66.1 MB). Free memory was 77.1 MB in the beginning and 174.5 MB in the end (delta: -97.4 MB). Peak memory consumption was 16.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 203.90 ms. Allocated memory is still 197.7 MB. Free memory was 174.5 MB in the beginning and 164.1 MB in the end (delta: 10.4 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1850.51 ms. Allocated memory was 197.7 MB in the beginning and 219.2 MB in the end (delta: 21.5 MB). Free memory was 163.5 MB in the beginning and 131.6 MB in the end (delta: 31.9 MB). Peak memory consumption was 53.4 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 5]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L11] unsigned int x = 0; [L12] unsigned int y = 1; VAL [x=0, y=1] [L14] COND TRUE x < 6 [L15] x++ [L16] y *= 2 VAL [x=1, y=2] [L14] COND TRUE x < 6 [L15] x++ [L16] y *= 2 VAL [x=2, y=4] [L14] COND TRUE x < 6 [L15] x++ [L16] y *= 2 VAL [x=3, y=8] [L14] COND TRUE x < 6 [L15] x++ [L16] y *= 2 VAL [x=4, y=16] [L14] COND TRUE x < 6 [L15] x++ [L16] y *= 2 VAL [x=5, y=32] [L14] COND TRUE x < 6 [L15] x++ [L16] y *= 2 VAL [x=6, y=64] [L14] COND FALSE !(x < 6) VAL [x=6, y=64] [L19] CALL __VERIFIER_assert(x != 6) VAL [\old(cond)=0] [L4] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L5] __VERIFIER_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 17 locations, 1 error locations. UNSAFE Result, 1.7s OverallTime, 7 OverallIterations, 6 TraceHistogramMax, 0.3s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 66 SDtfs, 1 SDslu, 256 SDs, 0 SdLazy, 193 SolverSat, 16 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 111 GetRequests, 57 SyntacticMatches, 16 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=17occurred in iteration=0, 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, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.8s InterpolantComputationTime, 156 NumberOfCodeBlocks, 156 NumberOfCodeBlocksAsserted, 19 NumberOfCheckSat, 129 ConstructedInterpolants, 0 QuantifiedInterpolants, 5249 SizeOfPredicates, 0 NumberOfNonLiveVariables, 195 ConjunctsInSsa, 75 ConjunctsInUnsatCore, 11 InterpolantComputations, 1 PerfectInterpolantSequences, 0/70 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...