/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/pnr3.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-07 01:32:10,597 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-07 01:32:10,599 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-07 01:32:10,612 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-07 01:32:10,612 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-07 01:32:10,613 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-07 01:32:10,614 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-07 01:32:10,616 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-07 01:32:10,618 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-07 01:32:10,621 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-07 01:32:10,622 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-07 01:32:10,624 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-07 01:32:10,625 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-07 01:32:10,628 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-07 01:32:10,629 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-07 01:32:10,630 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-07 01:32:10,632 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-07 01:32:10,635 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-07 01:32:10,637 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-07 01:32:10,640 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-07 01:32:10,643 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-07 01:32:10,645 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-07 01:32:10,646 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-07 01:32:10,649 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-07 01:32:10,654 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-07 01:32:10,669 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-07 01:32:10,670 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-07 01:32:10,671 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-07 01:32:10,672 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 01:32:10,694 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-07 01:32:10,694 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-07 01:32:10,697 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-07 01:32:10,697 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-07 01:32:10,697 INFO L138 SettingsManager]: * Use SBE=true [2019-11-07 01:32:10,698 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-07 01:32:10,698 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-07 01:32:10,698 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-07 01:32:10,698 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-07 01:32:10,698 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-07 01:32:10,700 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-07 01:32:10,700 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-07 01:32:10,700 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-07 01:32:10,701 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-07 01:32:10,701 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-07 01:32:10,701 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-07 01:32:10,701 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-07 01:32:10,702 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-07 01:32:10,702 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-07 01:32:10,702 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-07 01:32:10,702 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-07 01:32:10,702 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-07 01:32:10,703 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-07 01:32:10,703 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-07 01:32:10,703 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-07 01:32:10,703 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-07 01:32:10,703 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-07 01:32:10,704 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-07 01:32:10,704 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 01:32:11,001 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-07 01:32:11,015 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-07 01:32:11,018 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-07 01:32:11,020 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-07 01:32:11,020 INFO L275 PluginConnector]: CDTParser initialized [2019-11-07 01:32:11,021 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-tiling/pnr3.c [2019-11-07 01:32:11,086 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7afca3ecf/3deddece91da4a5184bdfe1d71048f3f/FLAG3d533f9ab [2019-11-07 01:32:11,538 INFO L306 CDTParser]: Found 1 translation units. [2019-11-07 01:32:11,539 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-tiling/pnr3.c [2019-11-07 01:32:11,549 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7afca3ecf/3deddece91da4a5184bdfe1d71048f3f/FLAG3d533f9ab [2019-11-07 01:32:11,940 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7afca3ecf/3deddece91da4a5184bdfe1d71048f3f [2019-11-07 01:32:11,952 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-07 01:32:11,954 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-07 01:32:11,966 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-07 01:32:11,966 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-07 01:32:11,979 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-07 01:32:11,983 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:32:11" (1/1) ... [2019-11-07 01:32:11,995 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@198c92c1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:32:11, skipping insertion in model container [2019-11-07 01:32:11,995 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:32:11" (1/1) ... [2019-11-07 01:32:12,015 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-07 01:32:12,069 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-07 01:32:12,364 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 01:32:12,375 INFO L188 MainTranslator]: Completed pre-run [2019-11-07 01:32:12,397 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 01:32:12,413 INFO L192 MainTranslator]: Completed translation [2019-11-07 01:32:12,413 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:32:12 WrapperNode [2019-11-07 01:32:12,414 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-07 01:32:12,414 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-07 01:32:12,415 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-07 01:32:12,415 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-07 01:32:12,516 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:32:12" (1/1) ... [2019-11-07 01:32:12,516 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:32:12" (1/1) ... [2019-11-07 01:32:12,523 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:32:12" (1/1) ... [2019-11-07 01:32:12,523 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:32:12" (1/1) ... [2019-11-07 01:32:12,532 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:32:12" (1/1) ... [2019-11-07 01:32:12,537 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:32:12" (1/1) ... [2019-11-07 01:32:12,539 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:32:12" (1/1) ... [2019-11-07 01:32:12,541 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-07 01:32:12,541 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-07 01:32:12,542 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-07 01:32:12,542 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-07 01:32:12,543 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:32:12" (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 01:32:12,598 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-07 01:32:12,599 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-07 01:32:12,599 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-11-07 01:32:12,599 INFO L138 BoogieDeclarations]: Found implementation of procedure ReadFromPort [2019-11-07 01:32:12,599 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-07 01:32:12,599 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-07 01:32:12,600 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-11-07 01:32:12,600 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-11-07 01:32:12,600 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-07 01:32:12,600 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-11-07 01:32:12,600 INFO L130 BoogieDeclarations]: Found specification of procedure ReadFromPort [2019-11-07 01:32:12,601 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-07 01:32:12,601 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-11-07 01:32:12,601 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-07 01:32:12,601 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-07 01:32:12,601 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-07 01:32:12,601 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-07 01:32:12,602 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-07 01:32:13,061 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-07 01:32:13,061 INFO L284 CfgBuilder]: Removed 2 assume(true) statements. [2019-11-07 01:32:13,062 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:32:13 BoogieIcfgContainer [2019-11-07 01:32:13,062 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-07 01:32:13,064 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-07 01:32:13,064 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-07 01:32:13,066 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-07 01:32:13,066 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:32:11" (1/3) ... [2019-11-07 01:32:13,067 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f051bb4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:32:13, skipping insertion in model container [2019-11-07 01:32:13,067 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:32:12" (2/3) ... [2019-11-07 01:32:13,068 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f051bb4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:32:13, skipping insertion in model container [2019-11-07 01:32:13,068 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:32:13" (3/3) ... [2019-11-07 01:32:13,070 INFO L109 eAbstractionObserver]: Analyzing ICFG pnr3.c [2019-11-07 01:32:13,077 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-07 01:32:13,084 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-07 01:32:13,095 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-07 01:32:13,120 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-07 01:32:13,121 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-07 01:32:13,121 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-07 01:32:13,121 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-07 01:32:13,121 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-07 01:32:13,122 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-07 01:32:13,122 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-07 01:32:13,122 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-07 01:32:13,138 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states. [2019-11-07 01:32:13,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-11-07 01:32:13,145 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:32:13,146 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:32:13,147 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:32:13,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:32:13,153 INFO L82 PathProgramCache]: Analyzing trace with hash 557815037, now seen corresponding path program 1 times [2019-11-07 01:32:13,160 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:32:13,160 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054554967] [2019-11-07 01:32:13,160 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:32:13,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:32:13,508 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 01:32:13,510 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054554967] [2019-11-07 01:32:13,512 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 01:32:13,512 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-07 01:32:13,514 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600658163] [2019-11-07 01:32:13,520 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 01:32:13,521 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:32:13,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 01:32:13,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-07 01:32:13,540 INFO L87 Difference]: Start difference. First operand 30 states. Second operand 4 states. [2019-11-07 01:32:13,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:32:13,683 INFO L93 Difference]: Finished difference Result 56 states and 67 transitions. [2019-11-07 01:32:13,684 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-07 01:32:13,685 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2019-11-07 01:32:13,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:32:13,695 INFO L225 Difference]: With dead ends: 56 [2019-11-07 01:32:13,695 INFO L226 Difference]: Without dead ends: 32 [2019-11-07 01:32:13,699 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 01:32:13,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-11-07 01:32:13,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 26. [2019-11-07 01:32:13,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-11-07 01:32:13,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2019-11-07 01:32:13,746 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 13 [2019-11-07 01:32:13,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:32:13,747 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2019-11-07 01:32:13,747 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 01:32:13,747 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2019-11-07 01:32:13,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-11-07 01:32:13,749 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:32:13,749 INFO L410 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:32:13,750 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:32:13,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:32:13,750 INFO L82 PathProgramCache]: Analyzing trace with hash 886321416, now seen corresponding path program 1 times [2019-11-07 01:32:13,750 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:32:13,751 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929343371] [2019-11-07 01:32:13,751 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:32:13,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:32:14,339 WARN L191 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 26 [2019-11-07 01:32:14,540 WARN L191 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 39 [2019-11-07 01:32:14,747 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-07 01:32:14,748 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929343371] [2019-11-07 01:32:14,748 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1813606452] [2019-11-07 01:32:14,749 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 01:32:14,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:32:14,819 INFO L256 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 18 conjunts are in the unsatisfiable core [2019-11-07 01:32:14,828 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:32:14,986 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2019-11-07 01:32:14,987 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-07 01:32:15,019 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-07 01:32:15,026 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2019-11-07 01:32:15,027 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-07 01:32:15,051 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-07 01:32:15,053 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-2 vars, End of recursive call: and 2 xjuncts. [2019-11-07 01:32:15,053 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:57, output treesize:46 [2019-11-07 01:32:15,107 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 01:32:15,122 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-07 01:32:15,130 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 38 [2019-11-07 01:32:15,131 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-07 01:32:15,138 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-07 01:32:15,143 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 42 [2019-11-07 01:32:15,144 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-07 01:32:15,182 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-07 01:32:15,183 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 2 xjuncts. [2019-11-07 01:32:15,184 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:83, output treesize:72 [2019-11-07 01:32:15,250 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 01:32:15,261 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-07 01:32:15,263 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-07 01:32:15,264 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-07 01:32:15,275 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 41 [2019-11-07 01:32:15,276 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-07 01:32:15,282 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-07 01:32:15,284 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-07 01:32:15,286 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-07 01:32:15,292 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 40 [2019-11-07 01:32:15,294 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-07 01:32:15,323 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-07 01:32:15,325 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 2 xjuncts. [2019-11-07 01:32:15,325 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:78, output treesize:64 [2019-11-07 01:32:15,457 INFO L341 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2019-11-07 01:32:15,458 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 16 [2019-11-07 01:32:15,459 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-07 01:32:15,465 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-07 01:32:15,466 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-07 01:32:15,466 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:39, output treesize:8 [2019-11-07 01:32:15,490 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 01:32:15,543 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-07 01:32:15,543 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:32:15,601 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 01:32:15,645 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 01:32:15,690 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 01:32:15,700 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2019-11-07 01:32:15,720 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 28 [2019-11-07 01:32:15,720 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2019-11-07 01:32:15,734 INFO L567 ElimStorePlain]: treesize reduction 15, result has 44.4 percent of original size [2019-11-07 01:32:15,734 INFO L496 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-07 01:32:15,741 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-07 01:32:15,745 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2019-11-07 01:32:15,759 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 28 [2019-11-07 01:32:15,760 INFO L496 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2019-11-07 01:32:15,772 INFO L567 ElimStorePlain]: treesize reduction 10, result has 56.5 percent of original size [2019-11-07 01:32:15,773 INFO L496 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2019-11-07 01:32:15,781 INFO L567 ElimStorePlain]: treesize reduction 12, result has 52.0 percent of original size [2019-11-07 01:32:15,782 INFO L496 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-2 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2019-11-07 01:32:15,782 INFO L221 ElimStorePlain]: Needed 5 recursive calls to eliminate 7 variables, input treesize:37, output treesize:13 [2019-11-07 01:32:15,859 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-07 01:32:15,859 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [266051658] [2019-11-07 01:32:15,898 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2019-11-07 01:32:15,898 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 01:32:15,908 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 01:32:15,917 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 01:32:15,918 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 01:32:16,037 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 30 for LOIs [2019-11-07 01:32:16,099 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-11-07 01:32:16,158 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-11-07 01:32:18,388 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-11-07 01:32:18,395 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-11-07 01:32:18,400 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-11-07 01:32:18,472 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 35 for LOIs [2019-11-07 01:32:18,481 INFO L197 IcfgInterpreter]: Interpreting procedure ReadFromPort with input of size 1 for LOIs [2019-11-07 01:32:18,482 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 16 for LOIs [2019-11-07 01:32:18,484 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 01:32:19,777 WARN L191 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 38 [2019-11-07 01:32:20,152 WARN L191 SmtUtils]: Spent 290.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 48 [2019-11-07 01:32:20,527 WARN L191 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 53 [2019-11-07 01:32:20,971 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-07 01:32:20,971 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 9, 20] total 42 [2019-11-07 01:32:20,973 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754570415] [2019-11-07 01:32:20,974 INFO L442 AbstractCegarLoop]: Interpolant automaton has 42 states [2019-11-07 01:32:20,974 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:32:20,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2019-11-07 01:32:20,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=1564, Unknown=0, NotChecked=0, Total=1722 [2019-11-07 01:32:20,977 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand 42 states. [2019-11-07 01:32:21,359 WARN L191 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 63 [2019-11-07 01:32:21,724 WARN L191 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 62 [2019-11-07 01:32:21,896 WARN L191 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 51 [2019-11-07 01:32:22,120 WARN L191 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 55 [2019-11-07 01:32:22,475 WARN L191 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 60 [2019-11-07 01:32:22,858 WARN L191 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 71 [2019-11-07 01:32:23,042 WARN L191 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 58 [2019-11-07 01:32:23,379 WARN L191 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 65 [2019-11-07 01:32:23,545 WARN L191 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 53 [2019-11-07 01:32:23,991 WARN L191 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 57 [2019-11-07 01:32:24,166 WARN L191 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 60 [2019-11-07 01:32:24,427 WARN L191 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 70 [2019-11-07 01:32:24,767 WARN L191 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 70 [2019-11-07 01:32:25,166 WARN L191 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 78 [2019-11-07 01:32:25,591 WARN L191 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 55 [2019-11-07 01:32:25,967 WARN L191 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 82 [2019-11-07 01:32:26,319 WARN L191 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 60 [2019-11-07 01:32:26,534 WARN L191 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 65 [2019-11-07 01:32:27,096 WARN L191 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 65 [2019-11-07 01:32:27,420 WARN L191 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 73 [2019-11-07 01:32:27,776 WARN L191 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 77 [2019-11-07 01:32:27,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:32:27,782 INFO L93 Difference]: Finished difference Result 54 states and 66 transitions. [2019-11-07 01:32:27,785 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2019-11-07 01:32:27,785 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 26 [2019-11-07 01:32:27,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:32:27,788 INFO L225 Difference]: With dead ends: 54 [2019-11-07 01:32:27,788 INFO L226 Difference]: Without dead ends: 52 [2019-11-07 01:32:27,791 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 45 SyntacticMatches, 4 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1151 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=596, Invalid=4516, Unknown=0, NotChecked=0, Total=5112 [2019-11-07 01:32:27,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2019-11-07 01:32:27,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 38. [2019-11-07 01:32:27,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-11-07 01:32:27,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 43 transitions. [2019-11-07 01:32:27,804 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 43 transitions. Word has length 26 [2019-11-07 01:32:27,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:32:27,804 INFO L462 AbstractCegarLoop]: Abstraction has 38 states and 43 transitions. [2019-11-07 01:32:27,804 INFO L463 AbstractCegarLoop]: Interpolant automaton has 42 states. [2019-11-07 01:32:27,805 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 43 transitions. [2019-11-07 01:32:27,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2019-11-07 01:32:27,806 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:32:27,806 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:32:28,015 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:32:28,016 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:32:28,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:32:28,016 INFO L82 PathProgramCache]: Analyzing trace with hash -767872105, now seen corresponding path program 1 times [2019-11-07 01:32:28,017 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:32:28,017 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036586261] [2019-11-07 01:32:28,017 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:32:28,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:32:28,340 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 14 proven. 8 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-11-07 01:32:28,340 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036586261] [2019-11-07 01:32:28,340 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [498781546] [2019-11-07 01:32:28,341 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:32:28,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:32:28,419 INFO L256 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-07 01:32:28,423 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:32:28,643 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 21 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-11-07 01:32:28,644 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:32:28,753 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 21 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-11-07 01:32:28,754 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [471838929] [2019-11-07 01:32:28,756 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2019-11-07 01:32:28,756 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 01:32:28,757 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 01:32:28,757 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 01:32:28,757 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 01:32:28,803 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 30 for LOIs [2019-11-07 01:32:28,838 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-11-07 01:32:28,892 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-11-07 01:32:30,232 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-11-07 01:32:30,238 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-11-07 01:32:30,243 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-11-07 01:32:30,289 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 40 for LOIs [2019-11-07 01:32:30,296 INFO L197 IcfgInterpreter]: Interpreting procedure ReadFromPort with input of size 1 for LOIs [2019-11-07 01:32:30,298 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 16 for LOIs [2019-11-07 01:32:30,299 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 01:32:30,823 WARN L191 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 49 [2019-11-07 01:32:31,829 WARN L191 SmtUtils]: Spent 279.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 48 [2019-11-07 01:32:32,162 WARN L191 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 55 [2019-11-07 01:32:32,790 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-07 01:32:32,791 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 8, 22] total 44 [2019-11-07 01:32:32,791 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058775977] [2019-11-07 01:32:32,792 INFO L442 AbstractCegarLoop]: Interpolant automaton has 44 states [2019-11-07 01:32:32,793 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:32:32,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2019-11-07 01:32:32,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=1685, Unknown=0, NotChecked=0, Total=1892 [2019-11-07 01:32:32,794 INFO L87 Difference]: Start difference. First operand 38 states and 43 transitions. Second operand 44 states. [2019-11-07 01:32:33,131 WARN L191 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 63 [2019-11-07 01:32:33,460 WARN L191 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 62 [2019-11-07 01:32:34,023 WARN L191 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 53 [2019-11-07 01:32:34,355 WARN L191 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 57 [2019-11-07 01:32:35,667 WARN L191 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 49 [2019-11-07 01:32:35,867 WARN L191 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 49 [2019-11-07 01:32:36,151 WARN L191 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 60 [2019-11-07 01:32:36,839 WARN L191 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 64 [2019-11-07 01:32:38,719 WARN L191 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 58 [2019-11-07 01:32:39,355 WARN L191 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 62 [2019-11-07 01:32:39,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:32:39,581 INFO L93 Difference]: Finished difference Result 74 states and 88 transitions. [2019-11-07 01:32:39,583 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2019-11-07 01:32:39,583 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 47 [2019-11-07 01:32:39,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:32:39,587 INFO L225 Difference]: With dead ends: 74 [2019-11-07 01:32:39,587 INFO L226 Difference]: Without dead ends: 51 [2019-11-07 01:32:39,589 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 105 SyntacticMatches, 3 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2540 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=955, Invalid=7235, Unknown=0, NotChecked=0, Total=8190 [2019-11-07 01:32:39,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2019-11-07 01:32:39,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 45. [2019-11-07 01:32:39,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2019-11-07 01:32:39,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 53 transitions. [2019-11-07 01:32:39,603 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 53 transitions. Word has length 47 [2019-11-07 01:32:39,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:32:39,603 INFO L462 AbstractCegarLoop]: Abstraction has 45 states and 53 transitions. [2019-11-07 01:32:39,603 INFO L463 AbstractCegarLoop]: Interpolant automaton has 44 states. [2019-11-07 01:32:39,604 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 53 transitions. [2019-11-07 01:32:39,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2019-11-07 01:32:39,605 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:32:39,606 INFO L410 BasicCegarLoop]: trace histogram [6, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:32:39,809 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:32:39,810 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:32:39,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:32:39,810 INFO L82 PathProgramCache]: Analyzing trace with hash -2131161886, now seen corresponding path program 2 times [2019-11-07 01:32:39,810 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:32:39,811 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333980266] [2019-11-07 01:32:39,811 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:32:39,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:32:40,152 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2019-11-07 01:32:40,152 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333980266] [2019-11-07 01:32:40,153 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [77341717] [2019-11-07 01:32:40,153 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:32:40,278 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-11-07 01:32:40,278 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-07 01:32:40,280 INFO L256 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 27 conjunts are in the unsatisfiable core [2019-11-07 01:32:40,289 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:32:44,958 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 22 proven. 30 refuted. 4 times theorem prover too weak. 16 trivial. 0 not checked. [2019-11-07 01:32:44,959 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:32:45,523 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2019-11-07 01:32:45,524 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [205673529] [2019-11-07 01:32:45,528 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2019-11-07 01:32:45,529 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 01:32:45,529 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 01:32:45,529 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 01:32:45,530 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 01:32:45,546 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 30 for LOIs [2019-11-07 01:32:45,577 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-11-07 01:32:45,615 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-11-07 01:32:47,219 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-11-07 01:32:47,226 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-11-07 01:32:47,231 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-11-07 01:32:47,276 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 40 for LOIs [2019-11-07 01:32:47,286 INFO L197 IcfgInterpreter]: Interpreting procedure ReadFromPort with input of size 1 for LOIs [2019-11-07 01:32:47,288 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 16 for LOIs [2019-11-07 01:32:47,290 INFO L180 IcfgInterpreter]: Interpretation finished