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/array-tiling/mbpr4.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-673a906-m [2019-10-02 00:23:38,548 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-02 00:23:38,550 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-02 00:23:38,562 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-02 00:23:38,562 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-02 00:23:38,563 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-02 00:23:38,564 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-02 00:23:38,566 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-02 00:23:38,568 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-02 00:23:38,569 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-02 00:23:38,569 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-02 00:23:38,571 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-02 00:23:38,571 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-02 00:23:38,572 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-02 00:23:38,573 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-02 00:23:38,574 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-02 00:23:38,575 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-02 00:23:38,576 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-02 00:23:38,577 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-02 00:23:38,579 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-02 00:23:38,586 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-02 00:23:38,588 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-02 00:23:38,589 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-02 00:23:38,589 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-02 00:23:38,592 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-02 00:23:38,610 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-02 00:23:38,611 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-02 00:23:38,612 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-02 00:23:38,613 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 [2019-10-02 00:23:38,636 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-02 00:23:38,636 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-02 00:23:38,638 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-02 00:23:38,639 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-02 00:23:38,639 INFO L138 SettingsManager]: * Use SBE=true [2019-10-02 00:23:38,639 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-02 00:23:38,639 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-02 00:23:38,639 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-02 00:23:38,640 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-02 00:23:38,640 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-02 00:23:38,641 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-02 00:23:38,641 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-02 00:23:38,641 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-02 00:23:38,642 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-02 00:23:38,642 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-02 00:23:38,642 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-02 00:23:38,642 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-02 00:23:38,643 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-02 00:23:38,643 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-02 00:23:38,643 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-02 00:23:38,643 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-02 00:23:38,644 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-02 00:23:38,644 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-02 00:23:38,644 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-02 00:23:38,644 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-02 00:23:38,645 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-02 00:23:38,645 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-02 00:23:38,645 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-02 00:23:38,645 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-02 00:23:38,690 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-02 00:23:38,702 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-02 00:23:38,706 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-02 00:23:38,707 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-02 00:23:38,707 INFO L275 PluginConnector]: CDTParser initialized [2019-10-02 00:23:38,708 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-tiling/mbpr4.c [2019-10-02 00:23:38,784 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0e56a2f73/b2cce79d34764ba59c8fe523fa32b283/FLAGa454c551a [2019-10-02 00:23:39,257 INFO L306 CDTParser]: Found 1 translation units. [2019-10-02 00:23:39,258 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-tiling/mbpr4.c [2019-10-02 00:23:39,268 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0e56a2f73/b2cce79d34764ba59c8fe523fa32b283/FLAGa454c551a [2019-10-02 00:23:39,632 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0e56a2f73/b2cce79d34764ba59c8fe523fa32b283 [2019-10-02 00:23:39,642 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-02 00:23:39,644 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-02 00:23:39,645 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-02 00:23:39,645 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-02 00:23:39,648 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-02 00:23:39,649 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.10 12:23:39" (1/1) ... [2019-10-02 00:23:39,651 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@51a810fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 12:23:39, skipping insertion in model container [2019-10-02 00:23:39,651 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.10 12:23:39" (1/1) ... [2019-10-02 00:23:39,658 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-02 00:23:39,675 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-02 00:23:39,907 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-02 00:23:39,912 INFO L188 MainTranslator]: Completed pre-run [2019-10-02 00:23:40,034 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-02 00:23:40,052 INFO L192 MainTranslator]: Completed translation [2019-10-02 00:23:40,052 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 12:23:40 WrapperNode [2019-10-02 00:23:40,052 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-02 00:23:40,053 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-02 00:23:40,053 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-02 00:23:40,054 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-02 00:23:40,066 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 12:23:40" (1/1) ... [2019-10-02 00:23:40,066 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 12:23:40" (1/1) ... [2019-10-02 00:23:40,075 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 12:23:40" (1/1) ... [2019-10-02 00:23:40,075 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 12:23:40" (1/1) ... [2019-10-02 00:23:40,089 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 12:23:40" (1/1) ... [2019-10-02 00:23:40,097 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 12:23:40" (1/1) ... [2019-10-02 00:23:40,099 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 12:23:40" (1/1) ... [2019-10-02 00:23:40,103 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-02 00:23:40,103 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-02 00:23:40,104 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-02 00:23:40,104 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-02 00:23:40,105 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 12:23:40" (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 [2019-10-02 00:23:40,167 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-02 00:23:40,168 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-02 00:23:40,168 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-02 00:23:40,168 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-02 00:23:40,168 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-02 00:23:40,168 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-10-02 00:23:40,168 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-02 00:23:40,169 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-02 00:23:40,169 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-02 00:23:40,169 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-02 00:23:40,169 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-02 00:23:40,169 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-02 00:23:40,170 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-02 00:23:40,170 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-02 00:23:40,170 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-02 00:23:40,607 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-02 00:23:40,608 INFO L283 CfgBuilder]: Removed 5 assume(true) statements. [2019-10-02 00:23:40,609 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.10 12:23:40 BoogieIcfgContainer [2019-10-02 00:23:40,609 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-02 00:23:40,610 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-02 00:23:40,610 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-02 00:23:40,613 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-02 00:23:40,613 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.10 12:23:39" (1/3) ... [2019-10-02 00:23:40,614 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21496714 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.10 12:23:40, skipping insertion in model container [2019-10-02 00:23:40,614 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 12:23:40" (2/3) ... [2019-10-02 00:23:40,615 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21496714 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.10 12:23:40, skipping insertion in model container [2019-10-02 00:23:40,615 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.10 12:23:40" (3/3) ... [2019-10-02 00:23:40,617 INFO L109 eAbstractionObserver]: Analyzing ICFG mbpr4.c [2019-10-02 00:23:40,625 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-02 00:23:40,636 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-02 00:23:40,654 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-02 00:23:40,685 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2019-10-02 00:23:40,686 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-10-02 00:23:40,686 INFO L378 AbstractCegarLoop]: Hoare is true [2019-10-02 00:23:40,686 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-02 00:23:40,686 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-02 00:23:40,686 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-02 00:23:40,686 INFO L382 AbstractCegarLoop]: Difference is false [2019-10-02 00:23:40,686 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-02 00:23:40,687 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-02 00:23:40,703 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states. [2019-10-02 00:23:40,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-10-02 00:23:40,710 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 00:23:40,711 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 00:23:40,713 INFO L418 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 00:23:40,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 00:23:40,718 INFO L82 PathProgramCache]: Analyzing trace with hash -1961398023, now seen corresponding path program 1 times [2019-10-02 00:23:40,719 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 00:23:40,720 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 00:23:40,771 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 00:23:40,771 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 00:23:40,771 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 00:23:40,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 00:23:40,880 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 00:23:40,883 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 00:23:40,883 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-10-02 00:23:40,887 INFO L454 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-10-02 00:23:40,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-10-02 00:23:40,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-02 00:23:40,900 INFO L87 Difference]: Start difference. First operand 45 states. Second operand 2 states. [2019-10-02 00:23:40,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 00:23:40,928 INFO L93 Difference]: Finished difference Result 78 states and 108 transitions. [2019-10-02 00:23:40,928 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-10-02 00:23:40,930 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 22 [2019-10-02 00:23:40,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 00:23:40,939 INFO L225 Difference]: With dead ends: 78 [2019-10-02 00:23:40,939 INFO L226 Difference]: Without dead ends: 39 [2019-10-02 00:23:40,943 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-02 00:23:40,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2019-10-02 00:23:40,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2019-10-02 00:23:40,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-10-02 00:23:40,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 48 transitions. [2019-10-02 00:23:40,986 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 48 transitions. Word has length 22 [2019-10-02 00:23:40,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 00:23:40,986 INFO L475 AbstractCegarLoop]: Abstraction has 39 states and 48 transitions. [2019-10-02 00:23:40,987 INFO L476 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-10-02 00:23:40,987 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 48 transitions. [2019-10-02 00:23:40,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-10-02 00:23:40,988 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 00:23:40,988 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 00:23:40,989 INFO L418 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 00:23:40,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 00:23:40,990 INFO L82 PathProgramCache]: Analyzing trace with hash -1084797805, now seen corresponding path program 1 times [2019-10-02 00:23:40,990 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 00:23:40,990 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 00:23:40,992 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 00:23:40,993 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 00:23:40,993 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 00:23:41,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 00:23:41,106 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 00:23:41,107 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 00:23:41,107 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-02 00:23:41,109 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-02 00:23:41,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-02 00:23:41,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-02 00:23:41,110 INFO L87 Difference]: Start difference. First operand 39 states and 48 transitions. Second operand 5 states. [2019-10-02 00:23:41,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 00:23:41,184 INFO L93 Difference]: Finished difference Result 47 states and 56 transitions. [2019-10-02 00:23:41,186 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-02 00:23:41,186 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 22 [2019-10-02 00:23:41,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 00:23:41,188 INFO L225 Difference]: With dead ends: 47 [2019-10-02 00:23:41,188 INFO L226 Difference]: Without dead ends: 45 [2019-10-02 00:23:41,190 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-02 00:23:41,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2019-10-02 00:23:41,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 44. [2019-10-02 00:23:41,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-10-02 00:23:41,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 53 transitions. [2019-10-02 00:23:41,212 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 53 transitions. Word has length 22 [2019-10-02 00:23:41,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 00:23:41,213 INFO L475 AbstractCegarLoop]: Abstraction has 44 states and 53 transitions. [2019-10-02 00:23:41,213 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-02 00:23:41,213 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 53 transitions. [2019-10-02 00:23:41,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-10-02 00:23:41,215 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 00:23:41,216 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 00:23:41,216 INFO L418 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 00:23:41,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 00:23:41,216 INFO L82 PathProgramCache]: Analyzing trace with hash -1082950763, now seen corresponding path program 1 times [2019-10-02 00:23:41,217 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 00:23:41,217 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 00:23:41,221 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 00:23:41,224 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 00:23:41,225 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 00:23:41,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 00:23:41,461 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 00:23:41,461 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 00:23:41,462 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-02 00:23:41,462 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-02 00:23:41,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-02 00:23:41,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-02 00:23:41,463 INFO L87 Difference]: Start difference. First operand 44 states and 53 transitions. Second operand 4 states. [2019-10-02 00:23:41,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 00:23:41,635 INFO L93 Difference]: Finished difference Result 80 states and 98 transitions. [2019-10-02 00:23:41,635 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-02 00:23:41,636 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 22 [2019-10-02 00:23:41,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 00:23:41,639 INFO L225 Difference]: With dead ends: 80 [2019-10-02 00:23:41,639 INFO L226 Difference]: Without dead ends: 48 [2019-10-02 00:23:41,640 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-02 00:23:41,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2019-10-02 00:23:41,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 45. [2019-10-02 00:23:41,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2019-10-02 00:23:41,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 54 transitions. [2019-10-02 00:23:41,649 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 54 transitions. Word has length 22 [2019-10-02 00:23:41,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 00:23:41,650 INFO L475 AbstractCegarLoop]: Abstraction has 45 states and 54 transitions. [2019-10-02 00:23:41,650 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-02 00:23:41,650 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 54 transitions. [2019-10-02 00:23:41,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-10-02 00:23:41,651 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 00:23:41,651 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 00:23:41,652 INFO L418 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 00:23:41,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 00:23:41,652 INFO L82 PathProgramCache]: Analyzing trace with hash -1675538566, now seen corresponding path program 1 times [2019-10-02 00:23:41,652 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 00:23:41,653 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 00:23:41,654 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 00:23:41,654 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 00:23:41,655 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 00:23:41,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 00:23:41,869 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 00:23:41,872 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-02 00:23:41,872 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 [2019-10-02 00:23:41,907 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 00:23:41,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 00:23:41,950 INFO L256 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-02 00:23:41,956 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 00:23:41,986 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 00:23:42,025 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 00:23:42,029 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-02 00:23:42,030 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 8 [2019-10-02 00:23:42,030 INFO L454 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-02 00:23:42,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-02 00:23:42,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-10-02 00:23:42,031 INFO L87 Difference]: Start difference. First operand 45 states and 54 transitions. Second operand 8 states. [2019-10-02 00:23:42,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 00:23:42,247 INFO L93 Difference]: Finished difference Result 93 states and 117 transitions. [2019-10-02 00:23:42,248 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-02 00:23:42,248 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 26 [2019-10-02 00:23:42,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 00:23:42,250 INFO L225 Difference]: With dead ends: 93 [2019-10-02 00:23:42,251 INFO L226 Difference]: Without dead ends: 66 [2019-10-02 00:23:42,252 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2019-10-02 00:23:42,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2019-10-02 00:23:42,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 48. [2019-10-02 00:23:42,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2019-10-02 00:23:42,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 57 transitions. [2019-10-02 00:23:42,279 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 57 transitions. Word has length 26 [2019-10-02 00:23:42,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 00:23:42,280 INFO L475 AbstractCegarLoop]: Abstraction has 48 states and 57 transitions. [2019-10-02 00:23:42,280 INFO L476 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-02 00:23:42,281 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 57 transitions. [2019-10-02 00:23:42,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2019-10-02 00:23:42,283 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 00:23:42,283 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 00:23:42,283 INFO L418 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 00:23:42,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 00:23:42,283 INFO L82 PathProgramCache]: Analyzing trace with hash -1636442583, now seen corresponding path program 1 times [2019-10-02 00:23:42,284 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 00:23:42,284 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 00:23:42,286 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 00:23:42,286 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 00:23:42,286 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 00:23:42,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 00:23:42,427 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-02 00:23:42,428 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 00:23:42,428 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-02 00:23:42,428 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-02 00:23:42,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-02 00:23:42,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-02 00:23:42,429 INFO L87 Difference]: Start difference. First operand 48 states and 57 transitions. Second operand 3 states. [2019-10-02 00:23:42,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 00:23:42,464 INFO L93 Difference]: Finished difference Result 69 states and 81 transitions. [2019-10-02 00:23:42,465 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-02 00:23:42,465 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 38 [2019-10-02 00:23:42,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 00:23:42,466 INFO L225 Difference]: With dead ends: 69 [2019-10-02 00:23:42,467 INFO L226 Difference]: Without dead ends: 48 [2019-10-02 00:23:42,467 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-02 00:23:42,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2019-10-02 00:23:42,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2019-10-02 00:23:42,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2019-10-02 00:23:42,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 56 transitions. [2019-10-02 00:23:42,482 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 56 transitions. Word has length 38 [2019-10-02 00:23:42,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 00:23:42,483 INFO L475 AbstractCegarLoop]: Abstraction has 48 states and 56 transitions. [2019-10-02 00:23:42,483 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-02 00:23:42,483 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 56 transitions. [2019-10-02 00:23:42,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2019-10-02 00:23:42,484 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 00:23:42,484 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 00:23:42,485 INFO L418 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 00:23:42,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 00:23:42,487 INFO L82 PathProgramCache]: Analyzing trace with hash -935378005, now seen corresponding path program 1 times [2019-10-02 00:23:42,487 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 00:23:42,487 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 00:23:42,488 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 00:23:42,488 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 00:23:42,488 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 00:23:42,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 00:23:43,504 WARN L191 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 37 [2019-10-02 00:23:44,122 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 00:23:44,123 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-02 00:23:44,123 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) [2019-10-02 00:23:44,148 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-10-02 00:23:44,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 00:23:44,176 INFO L256 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 22 conjunts are in the unsatisfiable core [2019-10-02 00:23:44,179 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 00:23:44,278 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2019-10-02 00:23:44,279 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-02 00:23:44,291 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-02 00:23:44,292 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-02 00:23:44,292 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:22 [2019-10-02 00:23:44,524 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-10-02 00:23:44,525 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.NullPointerException at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.arrays.MultiDimensionalNestedStore.getInnermost(MultiDimensionalNestedStore.java:121) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.arrays.ArrayOccurrenceAnalysis$ArrOccFinder$MyWalker.walk(ArrayOccurrenceAnalysis.java:277) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive$TermWalker.walk(NonRecursive.java:139) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.arrays.ArrayOccurrenceAnalysis$ArrOccFinder$MyWalker.walk(ArrayOccurrenceAnalysis.java:195) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:115) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:106) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.arrays.ArrayOccurrenceAnalysis$ArrOccFinder.(ArrayOccurrenceAnalysis.java:181) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.arrays.ArrayOccurrenceAnalysis.(ArrayOccurrenceAnalysis.java:83) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.arrays.ArrayOccurrenceAnalysis.downgradeDimensionsIfNecessary(ArrayOccurrenceAnalysis.java:171) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.arrays.ArrayIndexBasedCostEstimation.computeCostEstimation(ArrayIndexBasedCostEstimation.java:132) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.arrays.ArrayIndexBasedCostEstimation.(ArrayIndexBasedCostEstimation.java:64) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.computeCostEstimation(ElimStorePlain.java:519) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.doElimAllRec(ElimStorePlain.java:390) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.startRecursiveElimination(ElimStorePlain.java:216) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.PartialQuantifierElimination.elim(PartialQuantifierElimination.java:306) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.PartialQuantifierElimination.tryToEliminate(PartialQuantifierElimination.java:102) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.predicates.IterativePredicateTransformer$QuantifierEliminationPostprocessor.postprocess(IterativePredicateTransformer.java:245) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.predicates.IterativePredicateTransformer.applyPostprocessors(IterativePredicateTransformer.java:439) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.predicates.IterativePredicateTransformer.computeStrongestPostconditionSequence(IterativePredicateTransformer.java:200) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.TraceCheckSpWp.computeInterpolantsUsingUnsatCore(TraceCheckSpWp.java:292) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.TraceCheckSpWp.computeInterpolants(TraceCheckSpWp.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.TraceCheckSpWp.(TraceCheckSpWp.java:162) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceCheckConstructor.constructForwardBackward(TraceCheckConstructor.java:227) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceCheckConstructor.constructTraceCheck(TraceCheckConstructor.java:189) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceCheckConstructor.get(TraceCheckConstructor.java:166) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.MultiTrackRefinementStrategy.getTraceCheck(MultiTrackRefinementStrategy.java:233) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.BaseRefinementStrategy.checkFeasibility(BaseRefinementStrategy.java:223) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.BaseRefinementStrategy.executeStrategy(BaseRefinementStrategy.java:197) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:70) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:465) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:429) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:371) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterate(TraceAbstractionStarter.java:332) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:170) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:122) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:120) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:316) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) [2019-10-02 00:23:44,532 INFO L168 Benchmark]: Toolchain (without parser) took 4886.92 ms. Allocated memory was 132.6 MB in the beginning and 261.1 MB in the end (delta: 128.5 MB). Free memory was 88.2 MB in the beginning and 81.5 MB in the end (delta: 6.7 MB). Peak memory consumption was 135.2 MB. Max. memory is 7.1 GB. [2019-10-02 00:23:44,533 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 132.6 MB. Free memory was 106.9 MB in the beginning and 106.7 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. [2019-10-02 00:23:44,534 INFO L168 Benchmark]: CACSL2BoogieTranslator took 407.83 ms. Allocated memory was 132.6 MB in the beginning and 199.2 MB in the end (delta: 66.6 MB). Free memory was 88.0 MB in the beginning and 174.6 MB in the end (delta: -86.6 MB). Peak memory consumption was 25.1 MB. Max. memory is 7.1 GB. [2019-10-02 00:23:44,535 INFO L168 Benchmark]: Boogie Preprocessor took 49.73 ms. Allocated memory is still 199.2 MB. Free memory was 174.6 MB in the beginning and 172.2 MB in the end (delta: 2.4 MB). Peak memory consumption was 2.4 MB. Max. memory is 7.1 GB. [2019-10-02 00:23:44,536 INFO L168 Benchmark]: RCFGBuilder took 505.88 ms. Allocated memory is still 199.2 MB. Free memory was 172.2 MB in the beginning and 150.4 MB in the end (delta: 21.7 MB). Peak memory consumption was 21.7 MB. Max. memory is 7.1 GB. [2019-10-02 00:23:44,537 INFO L168 Benchmark]: TraceAbstraction took 3919.04 ms. Allocated memory was 199.2 MB in the beginning and 261.1 MB in the end (delta: 61.9 MB). Free memory was 149.8 MB in the beginning and 81.5 MB in the end (delta: 68.3 MB). Peak memory consumption was 130.2 MB. Max. memory is 7.1 GB. [2019-10-02 00:23:44,541 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 132.6 MB. Free memory was 106.9 MB in the beginning and 106.7 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 407.83 ms. Allocated memory was 132.6 MB in the beginning and 199.2 MB in the end (delta: 66.6 MB). Free memory was 88.0 MB in the beginning and 174.6 MB in the end (delta: -86.6 MB). Peak memory consumption was 25.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 49.73 ms. Allocated memory is still 199.2 MB. Free memory was 174.6 MB in the beginning and 172.2 MB in the end (delta: 2.4 MB). Peak memory consumption was 2.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 505.88 ms. Allocated memory is still 199.2 MB. Free memory was 172.2 MB in the beginning and 150.4 MB in the end (delta: 21.7 MB). Peak memory consumption was 21.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 3919.04 ms. Allocated memory was 199.2 MB in the beginning and 261.1 MB in the end (delta: 61.9 MB). Free memory was 149.8 MB in the beginning and 81.5 MB in the end (delta: 68.3 MB). Peak memory consumption was 130.2 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: NullPointerException: null de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: NullPointerException: null: de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.arrays.MultiDimensionalNestedStore.getInnermost(MultiDimensionalNestedStore.java:121) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...