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/pr5.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 21:39:22,813 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 21:39:22,816 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 21:39:22,830 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 21:39:22,831 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 21:39:22,832 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 21:39:22,833 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 21:39:22,835 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 21:39:22,837 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 21:39:22,839 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 21:39:22,841 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 21:39:22,845 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 21:39:22,845 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 21:39:22,848 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 21:39:22,849 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 21:39:22,850 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 21:39:22,852 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 21:39:22,856 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 21:39:22,857 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 21:39:22,863 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 21:39:22,866 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 21:39:22,867 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 21:39:22,869 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 21:39:22,870 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 21:39:22,872 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-13 21:39:22,882 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 21:39:22,884 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 21:39:22,888 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 21:39:22,888 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 21:39:22,903 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 21:39:22,903 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 21:39:22,905 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 21:39:22,905 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 21:39:22,905 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 21:39:22,905 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 21:39:22,905 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 21:39:22,906 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 21:39:22,906 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 21:39:22,906 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 21:39:22,906 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 21:39:22,906 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 21:39:22,907 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 21:39:22,907 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 21:39:22,907 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 21:39:22,907 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 21:39:22,907 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 21:39:22,908 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 21:39:22,908 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 21:39:22,908 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 21:39:22,908 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 21:39:22,908 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 21:39:22,909 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 21:39:22,909 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 21:39:22,909 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 21:39:22,909 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 21:39:22,909 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 21:39:22,910 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 21:39:22,910 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 21:39:23,265 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 21:39:23,283 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 21:39:23,286 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 21:39:23,288 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 21:39:23,289 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 21:39:23,290 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-tiling/pr5.c [2019-10-13 21:39:23,364 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a5884b97f/1828d9aeb7a442c39622cc722ca2d20e/FLAG6bcff1599 [2019-10-13 21:39:23,808 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 21:39:23,808 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-tiling/pr5.c [2019-10-13 21:39:23,816 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a5884b97f/1828d9aeb7a442c39622cc722ca2d20e/FLAG6bcff1599 [2019-10-13 21:39:24,185 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a5884b97f/1828d9aeb7a442c39622cc722ca2d20e [2019-10-13 21:39:24,195 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 21:39:24,197 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 21:39:24,198 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 21:39:24,198 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 21:39:24,202 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 21:39:24,203 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 09:39:24" (1/1) ... [2019-10-13 21:39:24,206 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@28330ebf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:39:24, skipping insertion in model container [2019-10-13 21:39:24,206 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 09:39:24" (1/1) ... [2019-10-13 21:39:24,214 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 21:39:24,239 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 21:39:24,473 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 21:39:24,478 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 21:39:24,517 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 21:39:24,535 INFO L192 MainTranslator]: Completed translation [2019-10-13 21:39:24,536 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:39:24 WrapperNode [2019-10-13 21:39:24,536 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 21:39:24,537 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 21:39:24,537 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 21:39:24,537 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 21:39:24,628 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:39:24" (1/1) ... [2019-10-13 21:39:24,629 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:39:24" (1/1) ... [2019-10-13 21:39:24,636 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:39:24" (1/1) ... [2019-10-13 21:39:24,636 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:39:24" (1/1) ... [2019-10-13 21:39:24,646 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:39:24" (1/1) ... [2019-10-13 21:39:24,652 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:39:24" (1/1) ... [2019-10-13 21:39:24,653 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:39:24" (1/1) ... [2019-10-13 21:39:24,656 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 21:39:24,657 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 21:39:24,657 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 21:39:24,657 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 21:39:24,658 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:39:24" (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 21:39:24,714 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 21:39:24,714 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 21:39:24,715 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-13 21:39:24,715 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 21:39:24,715 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 21:39:24,715 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-10-13 21:39:24,715 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-13 21:39:24,716 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 21:39:24,716 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 21:39:24,716 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-13 21:39:24,716 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-13 21:39:24,716 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-13 21:39:24,717 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-13 21:39:24,717 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 21:39:24,717 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 21:39:25,245 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 21:39:25,245 INFO L284 CfgBuilder]: Removed 2 assume(true) statements. [2019-10-13 21:39:25,246 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 09:39:25 BoogieIcfgContainer [2019-10-13 21:39:25,247 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 21:39:25,248 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 21:39:25,248 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 21:39:25,251 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 21:39:25,252 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 09:39:24" (1/3) ... [2019-10-13 21:39:25,252 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65fb4c84 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 09:39:25, skipping insertion in model container [2019-10-13 21:39:25,253 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:39:24" (2/3) ... [2019-10-13 21:39:25,253 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65fb4c84 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 09:39:25, skipping insertion in model container [2019-10-13 21:39:25,253 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 09:39:25" (3/3) ... [2019-10-13 21:39:25,255 INFO L109 eAbstractionObserver]: Analyzing ICFG pr5.c [2019-10-13 21:39:25,265 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 21:39:25,273 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 21:39:25,284 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 21:39:25,307 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 21:39:25,307 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 21:39:25,308 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 21:39:25,308 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 21:39:25,308 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 21:39:25,308 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 21:39:25,308 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 21:39:25,308 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 21:39:25,326 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2019-10-13 21:39:25,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-10-13 21:39:25,332 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:39:25,333 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:39:25,334 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:39:25,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:39:25,339 INFO L82 PathProgramCache]: Analyzing trace with hash -1164364785, now seen corresponding path program 1 times [2019-10-13 21:39:25,347 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 21:39:25,347 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152598498] [2019-10-13 21:39:25,347 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:39:25,348 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:39:25,348 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:39:25,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:39:25,688 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 21:39:25,689 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152598498] [2019-10-13 21:39:25,690 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 21:39:25,691 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 21:39:25,692 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638186393] [2019-10-13 21:39:25,697 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:39:25,697 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 21:39:25,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:39:25,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-13 21:39:25,718 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 4 states. [2019-10-13 21:39:25,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:39:25,845 INFO L93 Difference]: Finished difference Result 42 states and 48 transitions. [2019-10-13 21:39:25,846 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 21:39:25,847 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2019-10-13 21:39:25,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:39:25,860 INFO L225 Difference]: With dead ends: 42 [2019-10-13 21:39:25,861 INFO L226 Difference]: Without dead ends: 18 [2019-10-13 21:39:25,867 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 1 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 21:39:25,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2019-10-13 21:39:25,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2019-10-13 21:39:25,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2019-10-13 21:39:25,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2019-10-13 21:39:25,914 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2019-10-13 21:39:25,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:39:25,915 INFO L462 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2019-10-13 21:39:25,915 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:39:25,916 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2019-10-13 21:39:25,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-10-13 21:39:25,917 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:39:25,917 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:39:25,918 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:39:25,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:39:25,919 INFO L82 PathProgramCache]: Analyzing trace with hash 2078421125, now seen corresponding path program 1 times [2019-10-13 21:39:25,919 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 21:39:25,919 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24872596] [2019-10-13 21:39:25,920 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:39:25,920 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:39:25,920 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:39:26,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:39:26,544 WARN L191 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 37 [2019-10-13 21:39:26,745 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 21:39:26,748 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24872596] [2019-10-13 21:39:26,748 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1883007792] [2019-10-13 21:39:26,748 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 21:39:26,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:39:26,809 INFO L256 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 29 conjunts are in the unsatisfiable core [2019-10-13 21:39:26,817 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:39:26,922 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 21:39:26,925 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 21:39:26,927 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 21:39:26,929 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 21:39:26,931 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 21:39:26,939 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 21:39:26,947 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 21:39:26,949 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 21:39:26,955 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 21:39:26,966 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 21:39:26,967 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 21:39:26,969 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 21:39:26,973 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 21:39:26,978 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 21:39:26,979 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 21:39:26,983 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 21:39:26,992 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 21:39:26,995 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 21:39:26,996 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 21:39:27,000 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 21:39:27,013 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 21:39:27,015 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 21:39:27,023 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 21:39:27,024 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 21:39:27,027 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 21:39:27,346 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-13 21:39:27,387 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-13 21:39:27,409 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-13 21:39:27,437 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-13 21:39:27,470 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-13 21:39:27,481 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-13 21:39:27,522 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-13 21:39:27,564 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-13 21:39:27,595 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-13 21:39:27,629 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-13 21:39:27,658 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-13 21:39:27,701 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-13 21:39:27,732 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-13 21:39:27,733 INFO L235 Elim1Store]: Index analysis took 398 ms [2019-10-13 21:39:28,701 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 16 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 63 [2019-10-13 21:39:28,702 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts.