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 --traceabstraction.trace.refinement.strategy SIFA_TAIPAN --sifa.abstract.domain CompoundDomain --rcfgbuilder.size.of.a.code.block LoopFreeBlock --sifa.call.summarizer TopInputCallSummarizer --sifa.fluid SizeLimitFluid --sifa.simplification.technique SIMPLIFY_QUICK -i ../../../trunk/examples/svcomp/array-tiling/mbpr5.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 21:38:48,273 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 21:38:48,276 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 21:38:48,296 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 21:38:48,297 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 21:38:48,299 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 21:38:48,301 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 21:38:48,310 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 21:38:48,316 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 21:38:48,320 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 21:38:48,321 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 21:38:48,322 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 21:38:48,323 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 21:38:48,325 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 21:38:48,328 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 21:38:48,329 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 21:38:48,331 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 21:38:48,332 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 21:38:48,335 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 21:38:48,340 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 21:38:48,344 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 21:38:48,347 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 21:38:48,350 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 21:38:48,351 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 21:38:48,353 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-13 21:38:48,365 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 21:38:48,366 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 21:38:48,367 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 21:38:48,368 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 [2019-10-13 21:38:48,402 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 21:38:48,402 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 21:38:48,403 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 21:38:48,404 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 21:38:48,404 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 21:38:48,404 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 21:38:48,404 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 21:38:48,404 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 21:38:48,405 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 21:38:48,405 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 21:38:48,405 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 21:38:48,405 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 21:38:48,405 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 21:38:48,406 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 21:38:48,406 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 21:38:48,406 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 21:38:48,406 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 21:38:48,406 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 21:38:48,407 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 21:38:48,407 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 21:38:48,407 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 21:38:48,407 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 21:38:48,407 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 21:38:48,408 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 21:38:48,408 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 21:38:48,408 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 21:38:48,408 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 21:38:48,408 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 21:38:48,409 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> SIFA_TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> CompoundDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> LoopFreeBlock Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Call Summarizer -> TopInputCallSummarizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Fluid -> SizeLimitFluid Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Simplification Technique -> SIMPLIFY_QUICK [2019-10-13 21:38:48,720 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 21:38:48,743 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 21:38:48,747 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 21:38:48,749 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 21:38:48,749 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 21:38:48,750 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-tiling/mbpr5.c [2019-10-13 21:38:48,830 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/022f3ab85/8f69285700bb4451940ddc0da82497ce/FLAG8cad62d23 [2019-10-13 21:38:49,349 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 21:38:49,350 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-tiling/mbpr5.c [2019-10-13 21:38:49,357 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/022f3ab85/8f69285700bb4451940ddc0da82497ce/FLAG8cad62d23 [2019-10-13 21:38:49,691 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/022f3ab85/8f69285700bb4451940ddc0da82497ce [2019-10-13 21:38:49,701 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 21:38:49,703 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 21:38:49,704 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 21:38:49,704 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 21:38:49,708 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 21:38:49,709 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 09:38:49" (1/1) ... [2019-10-13 21:38:49,712 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4020d0db and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:38:49, skipping insertion in model container [2019-10-13 21:38:49,712 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 09:38:49" (1/1) ... [2019-10-13 21:38:49,720 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 21:38:49,758 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 21:38:50,013 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 21:38:50,018 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 21:38:50,148 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 21:38:50,167 INFO L192 MainTranslator]: Completed translation [2019-10-13 21:38:50,167 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:38:50 WrapperNode [2019-10-13 21:38:50,167 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 21:38:50,168 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 21:38:50,168 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 21:38:50,168 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 21:38:50,180 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:38:50" (1/1) ... [2019-10-13 21:38:50,181 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:38:50" (1/1) ... [2019-10-13 21:38:50,192 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:38:50" (1/1) ... [2019-10-13 21:38:50,192 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:38:50" (1/1) ... [2019-10-13 21:38:50,211 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:38:50" (1/1) ... [2019-10-13 21:38:50,219 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:38:50" (1/1) ... [2019-10-13 21:38:50,223 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:38:50" (1/1) ... [2019-10-13 21:38:50,226 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 21:38:50,227 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 21:38:50,227 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 21:38:50,227 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 21:38:50,228 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:38:50" (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 [2019-10-13 21:38:50,280 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 21:38:50,280 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 21:38:50,281 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-13 21:38:50,281 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 21:38:50,281 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 21:38:50,281 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-10-13 21:38:50,281 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-13 21:38:50,282 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 21:38:50,282 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 21:38:50,282 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-13 21:38:50,282 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-13 21:38:50,282 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-13 21:38:50,283 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-13 21:38:50,283 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 21:38:50,283 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 21:38:51,022 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 21:38:51,023 INFO L284 CfgBuilder]: Removed 6 assume(true) statements. [2019-10-13 21:38:51,026 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 09:38:51 BoogieIcfgContainer [2019-10-13 21:38:51,027 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 21:38:51,028 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 21:38:51,029 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 21:38:51,033 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 21:38:51,033 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 09:38:49" (1/3) ... [2019-10-13 21:38:51,034 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17611001 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 09:38:51, skipping insertion in model container [2019-10-13 21:38:51,035 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:38:50" (2/3) ... [2019-10-13 21:38:51,035 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17611001 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 09:38:51, skipping insertion in model container [2019-10-13 21:38:51,036 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 09:38:51" (3/3) ... [2019-10-13 21:38:51,038 INFO L109 eAbstractionObserver]: Analyzing ICFG mbpr5.c [2019-10-13 21:38:51,050 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 21:38:51,061 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 21:38:51,074 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 21:38:51,113 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 21:38:51,113 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 21:38:51,114 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 21:38:51,115 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 21:38:51,115 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 21:38:51,115 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 21:38:51,115 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 21:38:51,116 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 21:38:51,142 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states. [2019-10-13 21:38:51,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-10-13 21:38:51,151 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:38:51,153 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:38:51,155 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:38:51,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:38:51,162 INFO L82 PathProgramCache]: Analyzing trace with hash 1486384538, now seen corresponding path program 1 times [2019-10-13 21:38:51,172 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 21:38:51,173 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033478788] [2019-10-13 21:38:51,174 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:38:51,174 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:38:51,174 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:38:51,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:38:51,549 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 21:38:51,550 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033478788] [2019-10-13 21:38:51,551 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 21:38:51,552 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 21:38:51,552 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330636167] [2019-10-13 21:38:51,557 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:38:51,558 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 21:38:51,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:38:51,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-13 21:38:51,576 INFO L87 Difference]: Start difference. First operand 26 states. Second operand 4 states. [2019-10-13 21:38:51,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:38:51,750 INFO L93 Difference]: Finished difference Result 50 states and 64 transitions. [2019-10-13 21:38:51,751 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 21:38:51,753 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2019-10-13 21:38:51,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:38:51,764 INFO L225 Difference]: With dead ends: 50 [2019-10-13 21:38:51,764 INFO L226 Difference]: Without dead ends: 22 [2019-10-13 21:38:51,771 INFO L600 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 [2019-10-13 21:38:51,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2019-10-13 21:38:51,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2019-10-13 21:38:51,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-10-13 21:38:51,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 27 transitions. [2019-10-13 21:38:51,835 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 27 transitions. Word has length 17 [2019-10-13 21:38:51,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:38:51,838 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 27 transitions. [2019-10-13 21:38:51,838 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:38:51,838 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 27 transitions. [2019-10-13 21:38:51,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-10-13 21:38:51,840 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:38:51,840 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:38:51,840 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:38:51,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:38:51,841 INFO L82 PathProgramCache]: Analyzing trace with hash 32583855, now seen corresponding path program 1 times [2019-10-13 21:38:51,842 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 21:38:51,842 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525880336] [2019-10-13 21:38:51,842 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:38:51,843 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:38:51,843 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:38:51,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:38:52,168 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 21:38:52,169 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525880336] [2019-10-13 21:38:52,169 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1204422745] [2019-10-13 21:38:52,170 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:38:52,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:38:52,244 INFO L256 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 21:38:52,250 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:38:52,297 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 21:38:52,377 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 21:38:52,377 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:38:52,423 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-10-13 21:38:52,438 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 21:38:52,439 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 21:38:52,489 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 21:38:52,490 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1548570975] [2019-10-13 21:38:52,556 INFO L162 IcfgInterpreter]: Started Sifa with 18 locations of interest [2019-10-13 21:38:52,557 INFO L169 IcfgInterpreter]: Building call graph [2019-10-13 21:38:52,569 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-13 21:38:52,579 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-13 21:38:52,580 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-13 21:38:52,733 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 27 for LOIs [2019-10-13 21:38:53,323 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:38:53,325 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: java.lang.NullPointerException at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.tryExecuteInterpolantGenerator(TraceAbstractionRefinementEngine.java:307) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.generateProof(TraceAbstractionRefinementEngine.java:184) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.executeStrategy(TraceAbstractionRefinementEngine.java:174) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.RefinementEngineFactory.runRefinementEngine(RefinementEngineFactory.java:124) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:419) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:368) 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$Toolchain.processToolchain(ToolchainManager.java:316) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) Caused by: java.lang.NullPointerException at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.arrays.MultiDimensionalNestedStore.getInnermost(MultiDimensionalNestedStore.java:121) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.arrays.ArrayOccurrenceAnalysis$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$ArrOccFinder.(ArrayOccurrenceAnalysis.java:181) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.arrays.ArrayOccurrenceAnalysis.(ArrayOccurrenceAnalysis.java:83) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.arrays.ArrayOccurrenceAnalysis.downgradeDimensionsIfNecessary(ArrayOccurrenceAnalysis.java:171) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.arrays.ArrayIndexBasedCostEstimation.computeCostEstimation(ArrayIndexBasedCostEstimation.java:132) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.arrays.ArrayIndexBasedCostEstimation.(ArrayIndexBasedCostEstimation.java:64) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.computeCostEstimation(ElimStorePlain.java:519) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.doElimAllRec(ElimStorePlain.java:390) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.startRecursiveElimination(ElimStorePlain.java:216) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.PartialQuantifierElimination.elim(PartialQuantifierElimination.java:306) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.PartialQuantifierElimination.quantifier(PartialQuantifierElimination.java:146) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools$EliminatingTermDomainOperationProvider.newQuantifier(SymbolicTools.java:275) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools$EliminatingTermDomainOperationProvider.projectExistentially(SymbolicTools.java:263) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermDomainOperationProvider.projectExistentially(TermDomainOperationProvider.java:1) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateTransformer.strongestPostcondition(PredicateTransformer.java:131) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools.post(SymbolicTools.java:116) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretInternal(DagInterpreter.java:237) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTransAndStoreLoiPred(DagInterpreter.java:216) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTrans(DagInterpreter.java:197) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:166) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:130) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:104) at de.uni_freiburg.informatik.ultimate.lib.sifa.summarizers.FixpointLoopSummarizer.summarizeInternal(FixpointLoopSummarizer.java:118) at java.util.HashMap.computeIfAbsent(HashMap.java:1127) at de.uni_freiburg.informatik.ultimate.lib.sifa.summarizers.FixpointLoopSummarizer.summarize(FixpointLoopSummarizer.java:94) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretLoop(DagInterpreter.java:178) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:169) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:130) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpretLoisInProcedure(IcfgInterpreter.java:139) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpret(IcfgInterpreter.java:129) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:102) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.tryExecuteInterpolantGenerator(TraceAbstractionRefinementEngine.java:299) ... 21 more [2019-10-13 21:38:53,332 INFO L168 Benchmark]: Toolchain (without parser) took 3628.74 ms. Allocated memory was 138.4 MB in the beginning and 234.9 MB in the end (delta: 96.5 MB). Free memory was 101.8 MB in the beginning and 92.0 MB in the end (delta: 9.8 MB). Peak memory consumption was 106.3 MB. Max. memory is 7.1 GB. [2019-10-13 21:38:53,333 INFO L168 Benchmark]: CDTParser took 1.35 ms. Allocated memory is still 138.4 MB. Free memory was 120.4 MB in the beginning and 120.2 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2019-10-13 21:38:53,334 INFO L168 Benchmark]: CACSL2BoogieTranslator took 463.77 ms. Allocated memory was 138.4 MB in the beginning and 202.4 MB in the end (delta: 64.0 MB). Free memory was 101.6 MB in the beginning and 179.5 MB in the end (delta: -77.8 MB). Peak memory consumption was 23.3 MB. Max. memory is 7.1 GB. [2019-10-13 21:38:53,335 INFO L168 Benchmark]: Boogie Preprocessor took 58.66 ms. Allocated memory is still 202.4 MB. Free memory was 179.5 MB in the beginning and 176.9 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.6 MB. Max. memory is 7.1 GB. [2019-10-13 21:38:53,336 INFO L168 Benchmark]: RCFGBuilder took 800.22 ms. Allocated memory is still 202.4 MB. Free memory was 176.9 MB in the beginning and 131.4 MB in the end (delta: 45.5 MB). Peak memory consumption was 45.5 MB. Max. memory is 7.1 GB. [2019-10-13 21:38:53,337 INFO L168 Benchmark]: TraceAbstraction took 2301.42 ms. Allocated memory was 202.4 MB in the beginning and 234.9 MB in the end (delta: 32.5 MB). Free memory was 131.4 MB in the beginning and 92.0 MB in the end (delta: 39.4 MB). Peak memory consumption was 71.9 MB. Max. memory is 7.1 GB. [2019-10-13 21:38:53,344 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.35 ms. Allocated memory is still 138.4 MB. Free memory was 120.4 MB in the beginning and 120.2 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 463.77 ms. Allocated memory was 138.4 MB in the beginning and 202.4 MB in the end (delta: 64.0 MB). Free memory was 101.6 MB in the beginning and 179.5 MB in the end (delta: -77.8 MB). Peak memory consumption was 23.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 58.66 ms. Allocated memory is still 202.4 MB. Free memory was 179.5 MB in the beginning and 176.9 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.6 MB. Max. memory is 7.1 GB. * RCFGBuilder took 800.22 ms. Allocated memory is still 202.4 MB. Free memory was 176.9 MB in the beginning and 131.4 MB in the end (delta: 45.5 MB). Peak memory consumption was 45.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2301.42 ms. Allocated memory was 202.4 MB in the beginning and 234.9 MB in the end (delta: 32.5 MB). Free memory was 131.4 MB in the beginning and 92.0 MB in the end (delta: 39.4 MB). Peak memory consumption was 71.9 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: java.lang.NullPointerException de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: java.lang.NullPointerException: de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.tryExecuteInterpolantGenerator(TraceAbstractionRefinementEngine.java:307) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...