/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/mbpr2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-07 01:31:25,390 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-07 01:31:25,393 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-07 01:31:25,405 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-07 01:31:25,405 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-07 01:31:25,406 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-07 01:31:25,407 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-07 01:31:25,409 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-07 01:31:25,411 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-07 01:31:25,412 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-07 01:31:25,413 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-07 01:31:25,414 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-07 01:31:25,414 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-07 01:31:25,415 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-07 01:31:25,416 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-07 01:31:25,417 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-07 01:31:25,418 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-07 01:31:25,419 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-07 01:31:25,421 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-07 01:31:25,423 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-07 01:31:25,425 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-07 01:31:25,426 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-07 01:31:25,427 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-07 01:31:25,428 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-07 01:31:25,430 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-07 01:31:25,438 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-07 01:31:25,439 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-07 01:31:25,439 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-07 01:31:25,440 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 01:31:25,455 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-07 01:31:25,455 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-07 01:31:25,457 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-07 01:31:25,457 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-07 01:31:25,457 INFO L138 SettingsManager]: * Use SBE=true [2019-11-07 01:31:25,457 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-07 01:31:25,457 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-07 01:31:25,458 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-07 01:31:25,458 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-07 01:31:25,458 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-07 01:31:25,458 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-07 01:31:25,459 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-07 01:31:25,459 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-07 01:31:25,459 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-07 01:31:25,459 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-07 01:31:25,459 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-07 01:31:25,460 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-07 01:31:25,460 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-07 01:31:25,460 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-07 01:31:25,460 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-07 01:31:25,460 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-07 01:31:25,461 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-07 01:31:25,461 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-07 01:31:25,461 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-07 01:31:25,461 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-07 01:31:25,461 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-07 01:31:25,462 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-07 01:31:25,462 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-07 01:31:25,462 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 01:31:25,742 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-07 01:31:25,762 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-07 01:31:25,766 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-07 01:31:25,767 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-07 01:31:25,768 INFO L275 PluginConnector]: CDTParser initialized [2019-11-07 01:31:25,768 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-tiling/mbpr2.c [2019-11-07 01:31:25,840 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/324ea5602/9dfcd2c2ee734afb927eabadf58ea012/FLAG1e5a011fa [2019-11-07 01:31:26,308 INFO L306 CDTParser]: Found 1 translation units. [2019-11-07 01:31:26,309 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-tiling/mbpr2.c [2019-11-07 01:31:26,318 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/324ea5602/9dfcd2c2ee734afb927eabadf58ea012/FLAG1e5a011fa [2019-11-07 01:31:26,679 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/324ea5602/9dfcd2c2ee734afb927eabadf58ea012 [2019-11-07 01:31:26,689 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-07 01:31:26,691 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-07 01:31:26,692 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-07 01:31:26,692 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-07 01:31:26,696 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-07 01:31:26,697 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:31:26" (1/1) ... [2019-11-07 01:31:26,700 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6ec017b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:31:26, skipping insertion in model container [2019-11-07 01:31:26,700 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:31:26" (1/1) ... [2019-11-07 01:31:26,708 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-07 01:31:26,727 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-07 01:31:26,915 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 01:31:26,922 INFO L188 MainTranslator]: Completed pre-run [2019-11-07 01:31:26,947 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 01:31:27,051 INFO L192 MainTranslator]: Completed translation [2019-11-07 01:31:27,052 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:31:27 WrapperNode [2019-11-07 01:31:27,052 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-07 01:31:27,052 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-07 01:31:27,052 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-07 01:31:27,053 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-07 01:31:27,064 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:31:27" (1/1) ... [2019-11-07 01:31:27,064 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:31:27" (1/1) ... [2019-11-07 01:31:27,072 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:31:27" (1/1) ... [2019-11-07 01:31:27,072 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:31:27" (1/1) ... [2019-11-07 01:31:27,081 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:31:27" (1/1) ... [2019-11-07 01:31:27,087 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:31:27" (1/1) ... [2019-11-07 01:31:27,089 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:31:27" (1/1) ... [2019-11-07 01:31:27,091 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-07 01:31:27,092 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-07 01:31:27,092 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-07 01:31:27,092 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-07 01:31:27,093 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:31:27" (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 01:31:27,147 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-07 01:31:27,147 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-07 01:31:27,147 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-11-07 01:31:27,148 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-07 01:31:27,148 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-07 01:31:27,149 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-11-07 01:31:27,149 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-11-07 01:31:27,149 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-07 01:31:27,149 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-07 01:31:27,149 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-07 01:31:27,150 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-07 01:31:27,150 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-07 01:31:27,150 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-07 01:31:27,150 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-07 01:31:27,150 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-07 01:31:27,655 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-07 01:31:27,655 INFO L284 CfgBuilder]: Removed 3 assume(true) statements. [2019-11-07 01:31:27,656 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:31:27 BoogieIcfgContainer [2019-11-07 01:31:27,657 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-07 01:31:27,658 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-07 01:31:27,658 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-07 01:31:27,661 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-07 01:31:27,662 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:31:26" (1/3) ... [2019-11-07 01:31:27,663 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39341c25 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:31:27, skipping insertion in model container [2019-11-07 01:31:27,663 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:31:27" (2/3) ... [2019-11-07 01:31:27,663 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39341c25 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:31:27, skipping insertion in model container [2019-11-07 01:31:27,663 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:31:27" (3/3) ... [2019-11-07 01:31:27,665 INFO L109 eAbstractionObserver]: Analyzing ICFG mbpr2.c [2019-11-07 01:31:27,675 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-07 01:31:27,682 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-07 01:31:27,693 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-07 01:31:27,715 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-07 01:31:27,715 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-07 01:31:27,716 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-07 01:31:27,716 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-07 01:31:27,716 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-07 01:31:27,716 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-07 01:31:27,716 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-07 01:31:27,716 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-07 01:31:27,731 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states. [2019-11-07 01:31:27,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-11-07 01:31:27,737 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:31:27,738 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:31:27,740 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:31:27,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:31:27,745 INFO L82 PathProgramCache]: Analyzing trace with hash -1467824618, now seen corresponding path program 1 times [2019-11-07 01:31:27,754 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:31:27,755 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944971424] [2019-11-07 01:31:27,756 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:31:27,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:31:27,994 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 01:31:27,995 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944971424] [2019-11-07 01:31:27,997 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 01:31:27,997 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-07 01:31:27,998 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689529101] [2019-11-07 01:31:28,004 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 01:31:28,005 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:31:28,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 01:31:28,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-07 01:31:28,024 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 4 states. [2019-11-07 01:31:28,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:31:28,125 INFO L93 Difference]: Finished difference Result 45 states and 54 transitions. [2019-11-07 01:31:28,126 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-07 01:31:28,127 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2019-11-07 01:31:28,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:31:28,136 INFO L225 Difference]: With dead ends: 45 [2019-11-07 01:31:28,136 INFO L226 Difference]: Without dead ends: 20 [2019-11-07 01:31:28,141 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-07 01:31:28,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-11-07 01:31:28,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2019-11-07 01:31:28,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-11-07 01:31:28,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2019-11-07 01:31:28,181 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 14 [2019-11-07 01:31:28,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:31:28,182 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2019-11-07 01:31:28,182 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 01:31:28,182 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2019-11-07 01:31:28,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-11-07 01:31:28,183 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:31:28,183 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:31:28,184 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:31:28,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:31:28,184 INFO L82 PathProgramCache]: Analyzing trace with hash -1784631305, now seen corresponding path program 1 times [2019-11-07 01:31:28,185 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:31:28,185 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485857433] [2019-11-07 01:31:28,185 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:31:28,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:31:28,746 WARN L191 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 34 [2019-11-07 01:31:29,071 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 01:31:29,075 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485857433] [2019-11-07 01:31:29,076 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [196407356] [2019-11-07 01:31:29,076 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 01:31:29,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:31:29,149 INFO L256 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 27 conjunts are in the unsatisfiable core [2019-11-07 01:31:29,157 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:31:29,248 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 01:31:29,479 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:31:29,480 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$Toolchain.processToolchain(ToolchainManager.java:316) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) Caused by: java.lang.NullPointerException at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.arrays.ArrayOccurrenceAnalysis$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 01:31:29,488 INFO L168 Benchmark]: Toolchain (without parser) took 2796.87 ms. Allocated memory was 137.4 MB in the beginning and 232.3 MB in the end (delta: 94.9 MB). Free memory was 101.8 MB in the beginning and 146.2 MB in the end (delta: -44.4 MB). Peak memory consumption was 50.5 MB. Max. memory is 7.1 GB. [2019-11-07 01:31:29,491 INFO L168 Benchmark]: CDTParser took 1.18 ms. Allocated memory is still 137.4 MB. Free memory was 120.6 MB in the beginning and 120.4 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2019-11-07 01:31:29,495 INFO L168 Benchmark]: CACSL2BoogieTranslator took 359.88 ms. Allocated memory was 137.4 MB in the beginning and 200.8 MB in the end (delta: 63.4 MB). Free memory was 101.6 MB in the beginning and 179.0 MB in the end (delta: -77.4 MB). Peak memory consumption was 23.2 MB. Max. memory is 7.1 GB. [2019-11-07 01:31:29,496 INFO L168 Benchmark]: Boogie Preprocessor took 39.13 ms. Allocated memory is still 200.8 MB. Free memory was 179.0 MB in the beginning and 177.0 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. [2019-11-07 01:31:29,497 INFO L168 Benchmark]: RCFGBuilder took 565.00 ms. Allocated memory is still 200.8 MB. Free memory was 177.0 MB in the beginning and 149.9 MB in the end (delta: 27.1 MB). Peak memory consumption was 27.1 MB. Max. memory is 7.1 GB. [2019-11-07 01:31:29,502 INFO L168 Benchmark]: TraceAbstraction took 1828.32 ms. Allocated memory was 200.8 MB in the beginning and 232.3 MB in the end (delta: 31.5 MB). Free memory was 149.2 MB in the beginning and 146.2 MB in the end (delta: 3.0 MB). Peak memory consumption was 34.5 MB. Max. memory is 7.1 GB. [2019-11-07 01:31:29,518 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.18 ms. Allocated memory is still 137.4 MB. Free memory was 120.6 MB in the beginning and 120.4 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 359.88 ms. Allocated memory was 137.4 MB in the beginning and 200.8 MB in the end (delta: 63.4 MB). Free memory was 101.6 MB in the beginning and 179.0 MB in the end (delta: -77.4 MB). Peak memory consumption was 23.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 39.13 ms. Allocated memory is still 200.8 MB. Free memory was 179.0 MB in the beginning and 177.0 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 565.00 ms. Allocated memory is still 200.8 MB. Free memory was 177.0 MB in the beginning and 149.9 MB in the end (delta: 27.1 MB). Peak memory consumption was 27.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1828.32 ms. Allocated memory was 200.8 MB in the beginning and 232.3 MB in the end (delta: 31.5 MB). Free memory was 149.2 MB in the beginning and 146.2 MB in the end (delta: 3.0 MB). Peak memory consumption was 34.5 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...