/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/pr5.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-07 01:32:52,960 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-07 01:32:52,962 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-07 01:32:52,978 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-07 01:32:53,004 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-07 01:32:53,006 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-07 01:32:53,008 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-07 01:32:53,012 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-07 01:32:53,014 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-07 01:32:53,015 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-07 01:32:53,016 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-07 01:32:53,020 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-07 01:32:53,024 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-07 01:32:53,027 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-07 01:32:53,030 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-07 01:32:53,030 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-07 01:32:53,033 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-07 01:32:53,045 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-07 01:32:53,046 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-07 01:32:53,046 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-07 01:32:53,047 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 01:32:53,087 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-07 01:32:53,087 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-07 01:32:53,089 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-07 01:32:53,089 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-07 01:32:53,089 INFO L138 SettingsManager]: * Use SBE=true [2019-11-07 01:32:53,089 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-07 01:32:53,090 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-07 01:32:53,090 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-07 01:32:53,090 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-07 01:32:53,090 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-07 01:32:53,090 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-07 01:32:53,091 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-07 01:32:53,091 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-07 01:32:53,091 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-07 01:32:53,091 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-07 01:32:53,091 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-07 01:32:53,091 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-07 01:32:53,092 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-07 01:32:53,092 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-07 01:32:53,092 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-07 01:32:53,092 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-07 01:32:53,092 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-07 01:32:53,093 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-07 01:32:53,093 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-07 01:32:53,093 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-07 01:32:53,093 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-07 01:32:53,093 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-07 01:32:53,094 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-07 01:32:53,094 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 01:32:53,376 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-07 01:32:53,389 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-07 01:32:53,393 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-07 01:32:53,394 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-07 01:32:53,395 INFO L275 PluginConnector]: CDTParser initialized [2019-11-07 01:32:53,395 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-tiling/pr5.c [2019-11-07 01:32:53,464 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/816d9dfe0/26c9566e8da64061a1c47ebb090ea533/FLAGcdfeb53e5 [2019-11-07 01:32:53,903 INFO L306 CDTParser]: Found 1 translation units. [2019-11-07 01:32:53,904 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-tiling/pr5.c [2019-11-07 01:32:53,911 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/816d9dfe0/26c9566e8da64061a1c47ebb090ea533/FLAGcdfeb53e5 [2019-11-07 01:32:54,330 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/816d9dfe0/26c9566e8da64061a1c47ebb090ea533 [2019-11-07 01:32:54,351 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-07 01:32:54,358 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-07 01:32:54,362 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-07 01:32:54,362 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-07 01:32:54,366 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-07 01:32:54,367 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:32:54" (1/1) ... [2019-11-07 01:32:54,370 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@25f9a9b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:32:54, skipping insertion in model container [2019-11-07 01:32:54,370 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:32:54" (1/1) ... [2019-11-07 01:32:54,378 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-07 01:32:54,398 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-07 01:32:54,580 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 01:32:54,585 INFO L188 MainTranslator]: Completed pre-run [2019-11-07 01:32:54,694 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 01:32:54,715 INFO L192 MainTranslator]: Completed translation [2019-11-07 01:32:54,716 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:32:54 WrapperNode [2019-11-07 01:32:54,716 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-07 01:32:54,717 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-07 01:32:54,717 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-07 01:32:54,717 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-07 01:32:54,730 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:32:54" (1/1) ... [2019-11-07 01:32:54,730 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:32:54" (1/1) ... [2019-11-07 01:32:54,737 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:32:54" (1/1) ... [2019-11-07 01:32:54,737 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:32:54" (1/1) ... [2019-11-07 01:32:54,746 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:32:54" (1/1) ... [2019-11-07 01:32:54,752 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:32:54" (1/1) ... [2019-11-07 01:32:54,754 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:32:54" (1/1) ... [2019-11-07 01:32:54,756 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-07 01:32:54,757 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-07 01:32:54,757 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-07 01:32:54,757 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-07 01:32:54,758 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:32:54" (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 01:32:54,820 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-07 01:32:54,820 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-07 01:32:54,820 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-11-07 01:32:54,820 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-07 01:32:54,820 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-07 01:32:54,820 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-11-07 01:32:54,821 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-11-07 01:32:54,821 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-07 01:32:54,821 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-07 01:32:54,821 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-07 01:32:54,821 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-07 01:32:54,822 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-07 01:32:54,822 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-07 01:32:54,822 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-07 01:32:54,822 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-07 01:32:55,372 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-07 01:32:55,373 INFO L284 CfgBuilder]: Removed 2 assume(true) statements. [2019-11-07 01:32:55,374 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:32:55 BoogieIcfgContainer [2019-11-07 01:32:55,374 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-07 01:32:55,375 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-07 01:32:55,376 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-07 01:32:55,379 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-07 01:32:55,379 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:32:54" (1/3) ... [2019-11-07 01:32:55,380 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45303b13 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:32:55, skipping insertion in model container [2019-11-07 01:32:55,380 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:32:54" (2/3) ... [2019-11-07 01:32:55,381 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45303b13 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:32:55, skipping insertion in model container [2019-11-07 01:32:55,381 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:32:55" (3/3) ... [2019-11-07 01:32:55,383 INFO L109 eAbstractionObserver]: Analyzing ICFG pr5.c [2019-11-07 01:32:55,393 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-07 01:32:55,402 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-07 01:32:55,414 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-07 01:32:55,440 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-07 01:32:55,440 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-07 01:32:55,441 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-07 01:32:55,441 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-07 01:32:55,441 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-07 01:32:55,442 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-07 01:32:55,442 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-07 01:32:55,442 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-07 01:32:55,461 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2019-11-07 01:32:55,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-11-07 01:32:55,468 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:32:55,469 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:32:55,472 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:32:55,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:32:55,478 INFO L82 PathProgramCache]: Analyzing trace with hash -1164364785, now seen corresponding path program 1 times [2019-11-07 01:32:55,488 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:32:55,488 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966186264] [2019-11-07 01:32:55,489 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:32:55,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:32:55,803 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 01:32:55,804 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966186264] [2019-11-07 01:32:55,805 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 01:32:55,805 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-07 01:32:55,806 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366206348] [2019-11-07 01:32:55,813 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 01:32:55,813 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:32:55,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 01:32:55,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-07 01:32:55,836 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 4 states. [2019-11-07 01:32:55,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:32:55,923 INFO L93 Difference]: Finished difference Result 42 states and 48 transitions. [2019-11-07 01:32:55,924 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-07 01:32:55,925 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2019-11-07 01:32:55,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:32:55,935 INFO L225 Difference]: With dead ends: 42 [2019-11-07 01:32:55,935 INFO L226 Difference]: Without dead ends: 18 [2019-11-07 01:32:55,946 INFO L630 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 [2019-11-07 01:32:55,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2019-11-07 01:32:55,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2019-11-07 01:32:55,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2019-11-07 01:32:55,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2019-11-07 01:32:55,996 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2019-11-07 01:32:55,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:32:55,997 INFO L462 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2019-11-07 01:32:55,998 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 01:32:55,998 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2019-11-07 01:32:55,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-11-07 01:32:55,999 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:32:56,000 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:32:56,000 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:32:56,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:32:56,001 INFO L82 PathProgramCache]: Analyzing trace with hash 2078421125, now seen corresponding path program 1 times [2019-11-07 01:32:56,001 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:32:56,001 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793613499] [2019-11-07 01:32:56,002 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:32:56,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:32:56,514 WARN L191 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 29 [2019-11-07 01:32:56,685 WARN L191 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 37 [2019-11-07 01:32:56,903 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 01:32:56,904 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793613499] [2019-11-07 01:32:56,904 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1248956352] [2019-11-07 01:32:56,904 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 01:32:56,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:32:56,987 INFO L256 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 29 conjunts are in the unsatisfiable core [2019-11-07 01:32:56,996 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:32:57,104 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 01:32:57,108 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 01:32:57,110 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 01:32:57,113 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 01:32:57,116 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 01:32:57,123 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 01:32:57,130 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 01:32:57,132 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 01:32:57,137 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 01:32:57,149 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 01:32:57,150 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 01:32:57,151 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 01:32:57,154 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 01:32:57,159 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 01:32:57,160 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 01:32:57,165 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 01:32:57,175 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 01:32:57,179 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 01:32:57,180 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 01:32:57,185 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 01:32:57,195 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 01:32:57,197 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 01:32:57,204 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 01:32:57,204 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 01:32:57,208 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 01:32:57,505 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-07 01:32:57,551 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-07 01:32:57,571 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-07 01:32:57,593 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-07 01:32:57,617 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-07 01:32:57,625 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-07 01:32:57,660 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-07 01:32:57,695 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-07 01:32:57,718 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-07 01:32:57,762 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-07 01:32:57,787 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-07 01:32:57,822 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-07 01:32:57,847 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-07 01:32:57,847 INFO L235 Elim1Store]: Index analysis took 353 ms [2019-11-07 01:32:58,716 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 [2019-11-07 01:32:58,717 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts.