/usr/bin/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/mbpr4.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-07 01:31:31,776 INFO L177 SettingsManager]: Resetting all preferences to default values... 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[2019-11-07 01:31:31,864 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-07 01:31:31,865 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-07 01:31:31,866 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-07 01:31:31,867 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 [2019-11-07 01:31:31,900 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-07 01:31:31,900 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-07 01:31:31,901 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-07 01:31:31,906 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-07 01:31:31,906 INFO L138 SettingsManager]: * Use SBE=true [2019-11-07 01:31:31,907 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-07 01:31:31,907 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-07 01:31:31,907 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-07 01:31:31,907 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-07 01:31:31,908 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-07 01:31:31,908 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-07 01:31:31,908 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-07 01:31:31,908 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-07 01:31:31,908 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-07 01:31:31,909 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-07 01:31:31,910 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-07 01:31:31,911 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-07 01:31:31,911 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-07 01:31:31,911 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-07 01:31:31,911 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-07 01:31:31,912 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-07 01:31:31,912 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-07 01:31:31,912 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-07 01:31:31,912 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-07 01:31:31,912 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-07 01:31:31,913 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-07 01:31:31,913 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-07 01:31:31,913 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-07 01:31:31,913 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 [2019-11-07 01:31:32,208 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-07 01:31:32,229 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-07 01:31:32,233 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-07 01:31:32,234 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-07 01:31:32,234 INFO L275 PluginConnector]: CDTParser initialized [2019-11-07 01:31:32,235 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-tiling/mbpr4.c [2019-11-07 01:31:32,301 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aa7feefe4/623dc224e91e4ed5b2fc45b28b695002/FLAGb34b14a73 [2019-11-07 01:31:32,755 INFO L306 CDTParser]: Found 1 translation units. [2019-11-07 01:31:32,755 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-tiling/mbpr4.c [2019-11-07 01:31:32,763 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aa7feefe4/623dc224e91e4ed5b2fc45b28b695002/FLAGb34b14a73 [2019-11-07 01:31:33,141 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aa7feefe4/623dc224e91e4ed5b2fc45b28b695002 [2019-11-07 01:31:33,151 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-07 01:31:33,153 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-07 01:31:33,154 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-07 01:31:33,154 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-07 01:31:33,157 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-07 01:31:33,158 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:31:33" (1/1) ... [2019-11-07 01:31:33,161 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@186ced83 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:31:33, skipping insertion in model container [2019-11-07 01:31:33,162 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:31:33" (1/1) ... [2019-11-07 01:31:33,168 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-07 01:31:33,195 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-07 01:31:33,374 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 01:31:33,379 INFO L188 MainTranslator]: Completed pre-run [2019-11-07 01:31:33,419 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 01:31:33,519 INFO L192 MainTranslator]: Completed translation [2019-11-07 01:31:33,520 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:31:33 WrapperNode [2019-11-07 01:31:33,520 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-07 01:31:33,521 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-07 01:31:33,521 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-07 01:31:33,521 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-07 01:31:33,532 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:31:33" (1/1) ... [2019-11-07 01:31:33,532 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:31:33" (1/1) ... [2019-11-07 01:31:33,543 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:31:33" (1/1) ... [2019-11-07 01:31:33,543 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:31:33" (1/1) ... [2019-11-07 01:31:33,569 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:31:33" (1/1) ... [2019-11-07 01:31:33,576 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:31:33" (1/1) ... [2019-11-07 01:31:33,578 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:31:33" (1/1) ... [2019-11-07 01:31:33,581 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-07 01:31:33,582 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-07 01:31:33,582 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-07 01:31:33,582 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-07 01:31:33,583 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:31:33" (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 [2019-11-07 01:31:33,643 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-07 01:31:33,643 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-07 01:31:33,643 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-11-07 01:31:33,643 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-07 01:31:33,644 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-07 01:31:33,644 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-11-07 01:31:33,644 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-11-07 01:31:33,644 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-07 01:31:33,644 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-07 01:31:33,644 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-07 01:31:33,645 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-07 01:31:33,645 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-07 01:31:33,645 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-07 01:31:33,645 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-07 01:31:33,645 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-07 01:31:34,316 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-07 01:31:34,317 INFO L284 CfgBuilder]: Removed 5 assume(true) statements. [2019-11-07 01:31:34,318 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:31:34 BoogieIcfgContainer [2019-11-07 01:31:34,319 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-07 01:31:34,320 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-07 01:31:34,320 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-07 01:31:34,323 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-07 01:31:34,324 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:31:33" (1/3) ... [2019-11-07 01:31:34,325 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d65a440 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:31:34, skipping insertion in model container [2019-11-07 01:31:34,325 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:31:33" (2/3) ... [2019-11-07 01:31:34,325 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d65a440 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:31:34, skipping insertion in model container [2019-11-07 01:31:34,326 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:31:34" (3/3) ... [2019-11-07 01:31:34,328 INFO L109 eAbstractionObserver]: Analyzing ICFG mbpr4.c [2019-11-07 01:31:34,338 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-07 01:31:34,347 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-07 01:31:34,360 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-07 01:31:34,386 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-07 01:31:34,386 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-07 01:31:34,387 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-07 01:31:34,387 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-07 01:31:34,387 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-07 01:31:34,387 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-07 01:31:34,388 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-07 01:31:34,388 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-07 01:31:34,406 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states. [2019-11-07 01:31:34,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-11-07 01:31:34,413 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:31:34,415 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:31:34,417 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:31:34,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:31:34,423 INFO L82 PathProgramCache]: Analyzing trace with hash -1985347759, now seen corresponding path program 1 times [2019-11-07 01:31:34,433 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:31:34,434 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948712239] [2019-11-07 01:31:34,434 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:31:34,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:31:34,929 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 01:31:34,930 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948712239] [2019-11-07 01:31:34,931 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 01:31:34,931 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-07 01:31:34,932 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674160614] [2019-11-07 01:31:34,938 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-07 01:31:34,939 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:31:34,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-07 01:31:34,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-07 01:31:34,957 INFO L87 Difference]: Start difference. First operand 25 states. Second operand 5 states. [2019-11-07 01:31:35,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:31:35,087 INFO L93 Difference]: Finished difference Result 55 states and 69 transitions. [2019-11-07 01:31:35,088 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-07 01:31:35,089 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2019-11-07 01:31:35,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:31:35,099 INFO L225 Difference]: With dead ends: 55 [2019-11-07 01:31:35,099 INFO L226 Difference]: Without dead ends: 24 [2019-11-07 01:31:35,103 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-07 01:31:35,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2019-11-07 01:31:35,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2019-11-07 01:31:35,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-11-07 01:31:35,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2019-11-07 01:31:35,149 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 16 [2019-11-07 01:31:35,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:31:35,150 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2019-11-07 01:31:35,150 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-07 01:31:35,150 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2019-11-07 01:31:35,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-11-07 01:31:35,152 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:31:35,152 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:31:35,152 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:31:35,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:31:35,153 INFO L82 PathProgramCache]: Analyzing trace with hash -1386947649, now seen corresponding path program 1 times [2019-11-07 01:31:35,153 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:31:35,154 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160114288] [2019-11-07 01:31:35,154 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:31:35,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:31:36,321 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 01:31:36,322 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160114288] [2019-11-07 01:31:36,322 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [538839195] [2019-11-07 01:31:36,322 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 [2019-11-07 01:31:36,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:31:36,424 INFO L256 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 35 conjunts are in the unsatisfiable core [2019-11-07 01:31:36,433 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:31:36,551 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 01:31:36,798 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:31:36,800 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.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:188) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:178) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:83) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:75) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:463) 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$ArrOccFinder.(ArrayOccurrenceAnalysis.java:181) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.arrays.ArrayOccurrenceAnalysis.(ArrayOccurrenceAnalysis.java:83) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.arrays.ArrayOccurrenceAnalysis.downgradeDimensionsIfNecessary(ArrayOccurrenceAnalysis.java:171) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.arrays.ArrayIndexBasedCostEstimation.computeCostEstimation(ArrayIndexBasedCostEstimation.java:132) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.arrays.ArrayIndexBasedCostEstimation.(ArrayIndexBasedCostEstimation.java:64) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.computeCostEstimation(ElimStorePlain.java:519) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.doElimAllRec(ElimStorePlain.java:390) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.startRecursiveElimination(ElimStorePlain.java:216) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.PartialQuantifierElimination.elim(PartialQuantifierElimination.java:306) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.PartialQuantifierElimination.tryToEliminate(PartialQuantifierElimination.java:102) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.predicates.IterativePredicateTransformer$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.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:108) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:1) 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.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:294) ... 21 more [2019-11-07 01:31:36,807 INFO L168 Benchmark]: Toolchain (without parser) took 3652.89 ms. Allocated memory was 135.8 MB in the beginning and 252.7 MB in the end (delta: 116.9 MB). Free memory was 99.1 MB in the beginning and 217.2 MB in the end (delta: -118.0 MB). Peak memory consumption was 118.7 MB. Max. memory is 7.1 GB. [2019-11-07 01:31:36,810 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 135.8 MB. Free memory was 117.8 MB in the beginning and 117.5 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. [2019-11-07 01:31:36,811 INFO L168 Benchmark]: CACSL2BoogieTranslator took 366.59 ms. Allocated memory was 135.8 MB in the beginning and 199.8 MB in the end (delta: 64.0 MB). Free memory was 98.9 MB in the beginning and 178.1 MB in the end (delta: -79.2 MB). Peak memory consumption was 24.5 MB. Max. memory is 7.1 GB. [2019-11-07 01:31:36,813 INFO L168 Benchmark]: Boogie Preprocessor took 60.90 ms. Allocated memory is still 199.8 MB. Free memory was 178.1 MB in the beginning and 175.6 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 7.1 GB. [2019-11-07 01:31:36,814 INFO L168 Benchmark]: RCFGBuilder took 736.96 ms. Allocated memory is still 199.8 MB. Free memory was 175.6 MB in the beginning and 135.7 MB in the end (delta: 39.9 MB). Peak memory consumption was 39.9 MB. Max. memory is 7.1 GB. [2019-11-07 01:31:36,815 INFO L168 Benchmark]: TraceAbstraction took 2483.90 ms. Allocated memory was 199.8 MB in the beginning and 252.7 MB in the end (delta: 53.0 MB). Free memory was 135.7 MB in the beginning and 217.2 MB in the end (delta: -81.5 MB). Peak memory consumption was 91.3 MB. Max. memory is 7.1 GB. [2019-11-07 01:31:36,827 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 135.8 MB. Free memory was 117.8 MB in the beginning and 117.5 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 366.59 ms. Allocated memory was 135.8 MB in the beginning and 199.8 MB in the end (delta: 64.0 MB). Free memory was 98.9 MB in the beginning and 178.1 MB in the end (delta: -79.2 MB). Peak memory consumption was 24.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 60.90 ms. Allocated memory is still 199.8 MB. Free memory was 178.1 MB in the beginning and 175.6 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 7.1 GB. * RCFGBuilder took 736.96 ms. Allocated memory is still 199.8 MB. Free memory was 175.6 MB in the beginning and 135.7 MB in the end (delta: 39.9 MB). Peak memory consumption was 39.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2483.90 ms. Allocated memory was 199.8 MB in the beginning and 252.7 MB in the end (delta: 53.0 MB). Free memory was 135.7 MB in the beginning and 217.2 MB in the end (delta: -81.5 MB). Peak memory consumption was 91.3 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.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:302) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...