/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/pnr5.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-07 01:32:19,877 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-07 01:32:19,879 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-07 01:32:19,894 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-07 01:32:19,918 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-07 01:32:19,920 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-07 01:32:19,922 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-07 01:32:19,923 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-07 01:32:19,925 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-07 01:32:19,926 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-07 01:32:19,927 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-07 01:32:19,932 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-07 01:32:19,936 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-07 01:32:19,938 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-07 01:32:19,941 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-07 01:32:19,941 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-07 01:32:19,943 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-07 01:32:19,952 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-07 01:32:19,953 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-07 01:32:19,954 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-07 01:32:19,955 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 01:32:19,988 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-07 01:32:19,989 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-07 01:32:19,993 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-07 01:32:19,993 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-07 01:32:19,993 INFO L138 SettingsManager]: * Use SBE=true [2019-11-07 01:32:19,994 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-07 01:32:19,994 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-07 01:32:19,994 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-07 01:32:19,994 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-07 01:32:19,994 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-07 01:32:19,995 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-07 01:32:19,995 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-07 01:32:19,995 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-07 01:32:19,995 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-07 01:32:19,995 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-07 01:32:19,995 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-07 01:32:19,996 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-07 01:32:19,997 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-07 01:32:19,997 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-07 01:32:19,998 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-07 01:32:19,998 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-07 01:32:19,998 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-07 01:32:19,998 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-07 01:32:19,998 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-07 01:32:19,999 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-07 01:32:19,999 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-07 01:32:19,999 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-07 01:32:19,999 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-07 01:32:19,999 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 01:32:20,301 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-07 01:32:20,321 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-07 01:32:20,325 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-07 01:32:20,326 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-07 01:32:20,327 INFO L275 PluginConnector]: CDTParser initialized [2019-11-07 01:32:20,327 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-tiling/pnr5.c [2019-11-07 01:32:20,408 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fbb1fe5d5/1e700332e9544f0191cfa82590208052/FLAGf68871a5b [2019-11-07 01:32:20,879 INFO L306 CDTParser]: Found 1 translation units. [2019-11-07 01:32:20,880 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-tiling/pnr5.c [2019-11-07 01:32:20,886 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fbb1fe5d5/1e700332e9544f0191cfa82590208052/FLAGf68871a5b [2019-11-07 01:32:21,259 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fbb1fe5d5/1e700332e9544f0191cfa82590208052 [2019-11-07 01:32:21,288 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-07 01:32:21,292 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-07 01:32:21,299 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-07 01:32:21,299 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-07 01:32:21,308 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-07 01:32:21,309 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:32:21" (1/1) ... [2019-11-07 01:32:21,318 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@65193229 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:32:21, skipping insertion in model container [2019-11-07 01:32:21,318 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:32:21" (1/1) ... [2019-11-07 01:32:21,340 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-07 01:32:21,382 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-07 01:32:21,572 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 01:32:21,591 INFO L188 MainTranslator]: Completed pre-run [2019-11-07 01:32:21,724 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 01:32:21,740 INFO L192 MainTranslator]: Completed translation [2019-11-07 01:32:21,741 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:32:21 WrapperNode [2019-11-07 01:32:21,741 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-07 01:32:21,742 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-07 01:32:21,742 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-07 01:32:21,742 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-07 01:32:21,752 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:32:21" (1/1) ... [2019-11-07 01:32:21,752 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:32:21" (1/1) ... [2019-11-07 01:32:21,759 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:32:21" (1/1) ... [2019-11-07 01:32:21,760 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:32:21" (1/1) ... [2019-11-07 01:32:21,769 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:32:21" (1/1) ... [2019-11-07 01:32:21,775 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:32:21" (1/1) ... [2019-11-07 01:32:21,777 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:32:21" (1/1) ... [2019-11-07 01:32:21,780 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-07 01:32:21,780 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-07 01:32:21,780 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-07 01:32:21,780 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-07 01:32:21,781 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:32:21" (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 01:32:21,877 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-07 01:32:21,877 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-07 01:32:21,877 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-11-07 01:32:21,877 INFO L138 BoogieDeclarations]: Found implementation of procedure ReadFromPort [2019-11-07 01:32:21,878 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-07 01:32:21,879 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-07 01:32:21,880 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-11-07 01:32:21,880 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-11-07 01:32:21,880 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-07 01:32:21,881 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-11-07 01:32:21,881 INFO L130 BoogieDeclarations]: Found specification of procedure ReadFromPort [2019-11-07 01:32:21,882 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-07 01:32:21,882 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-11-07 01:32:21,883 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-07 01:32:21,883 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-07 01:32:21,883 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-07 01:32:21,885 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-07 01:32:21,885 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-07 01:32:22,350 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-07 01:32:22,351 INFO L284 CfgBuilder]: Removed 2 assume(true) statements. [2019-11-07 01:32:22,352 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:32:22 BoogieIcfgContainer [2019-11-07 01:32:22,352 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-07 01:32:22,354 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-07 01:32:22,354 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-07 01:32:22,357 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-07 01:32:22,357 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:32:21" (1/3) ... [2019-11-07 01:32:22,358 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33f1d76e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:32:22, skipping insertion in model container [2019-11-07 01:32:22,358 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:32:21" (2/3) ... [2019-11-07 01:32:22,359 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33f1d76e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:32:22, skipping insertion in model container [2019-11-07 01:32:22,359 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:32:22" (3/3) ... [2019-11-07 01:32:22,361 INFO L109 eAbstractionObserver]: Analyzing ICFG pnr5.c [2019-11-07 01:32:22,374 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-07 01:32:22,384 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-07 01:32:22,393 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-07 01:32:22,415 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-07 01:32:22,415 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-07 01:32:22,415 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-07 01:32:22,416 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-07 01:32:22,416 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-07 01:32:22,416 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-07 01:32:22,416 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-07 01:32:22,416 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-07 01:32:22,432 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states. [2019-11-07 01:32:22,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-11-07 01:32:22,438 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:32:22,439 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:32:22,441 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:32:22,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:32:22,446 INFO L82 PathProgramCache]: Analyzing trace with hash 939756021, now seen corresponding path program 1 times [2019-11-07 01:32:22,454 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:32:22,455 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798650445] [2019-11-07 01:32:22,455 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:32:22,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:32:22,790 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 01:32:22,791 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798650445] [2019-11-07 01:32:22,792 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 01:32:22,793 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-07 01:32:22,794 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480141665] [2019-11-07 01:32:22,801 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 01:32:22,802 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:32:22,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 01:32:22,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-07 01:32:22,820 INFO L87 Difference]: Start difference. First operand 34 states. Second operand 4 states. [2019-11-07 01:32:22,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:32:22,991 INFO L93 Difference]: Finished difference Result 64 states and 79 transitions. [2019-11-07 01:32:22,991 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-07 01:32:22,993 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2019-11-07 01:32:22,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:32:23,001 INFO L225 Difference]: With dead ends: 64 [2019-11-07 01:32:23,001 INFO L226 Difference]: Without dead ends: 40 [2019-11-07 01:32:23,004 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 01:32:23,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2019-11-07 01:32:23,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 30. [2019-11-07 01:32:23,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-11-07 01:32:23,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions. [2019-11-07 01:32:23,049 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 13 [2019-11-07 01:32:23,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:32:23,049 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 35 transitions. [2019-11-07 01:32:23,049 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 01:32:23,050 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2019-11-07 01:32:23,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-11-07 01:32:23,052 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:32:23,052 INFO L410 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 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 01:32:23,052 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:32:23,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:32:23,053 INFO L82 PathProgramCache]: Analyzing trace with hash 280844891, now seen corresponding path program 1 times [2019-11-07 01:32:23,053 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:32:23,054 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117875568] [2019-11-07 01:32:23,054 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:32:23,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:32:23,770 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-11-07 01:32:23,771 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117875568] [2019-11-07 01:32:23,771 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [367122017] [2019-11-07 01:32:23,771 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 01:32:23,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:32:23,862 INFO L256 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 22 conjunts are in the unsatisfiable core [2019-11-07 01:32:23,873 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:32:24,034 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 01:32:24,035 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-07 01:32:24,066 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-07 01:32:24,077 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 01:32:24,078 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-07 01:32:24,107 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-07 01:32:24,108 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 01:32:24,109 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:57, output treesize:46 [2019-11-07 01:32:24,157 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 01:32:24,181 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-07 01:32:24,190 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 01:32:24,191 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-07 01:32:24,199 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-07 01:32:24,205 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 01:32:24,206 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-07 01:32:24,241 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-07 01:32:24,242 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 01:32:24,242 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:83, output treesize:72 [2019-11-07 01:32:24,301 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 01:32:24,318 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-07 01:32:24,320 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-07 01:32:24,321 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-07 01:32:24,335 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 56 treesize of output 58 [2019-11-07 01:32:24,338 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-07 01:32:24,355 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-07 01:32:24,357 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-07 01:32:24,358 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-07 01:32:24,365 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 52 treesize of output 54 [2019-11-07 01:32:24,367 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-07 01:32:24,414 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-07 01:32:24,415 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 01:32:24,416 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:109, output treesize:98 [2019-11-07 01:32:24,493 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 01:32:24,512 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-07 01:32:24,516 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-07 01:32:24,519 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-07 01:32:24,520 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-07 01:32:24,522 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-07 01:32:24,524 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-07 01:32:24,547 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 74 [2019-11-07 01:32:24,549 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-07 01:32:24,568 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-07 01:32:24,570 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-07 01:32:24,572 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-07 01:32:24,573 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-07 01:32:24,574 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-07 01:32:24,577 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-07 01:32:24,589 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 70 [2019-11-07 01:32:24,593 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-07 01:32:24,649 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-07 01:32:24,650 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 01:32:24,651 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:135, output treesize:124 [2019-11-07 01:32:24,764 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 01:32:24,780 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-07 01:32:24,782 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-07 01:32:24,783 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-07 01:32:24,784 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-07 01:32:24,785 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-07 01:32:24,786 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-07 01:32:24,787 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-07 01:32:24,789 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-07 01:32:24,790 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-07 01:32:24,792 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-07 01:32:24,822 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 11 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 67 [2019-11-07 01:32:24,825 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-07 01:32:24,832 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-07 01:32:24,833 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-07 01:32:24,834 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-07 01:32:24,836 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-07 01:32:24,837 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-07 01:32:24,838 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-07 01:32:24,839 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-07 01:32:24,840 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-07 01:32:24,841 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-07 01:32:24,842 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-07 01:32:24,851 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 66 [2019-11-07 01:32:24,852 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-07 01:32:24,890 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-07 01:32:24,892 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 01:32:24,894 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:118, output treesize:104 [2019-11-07 01:32:25,008 INFO L341 Elim1Store]: treesize reduction 112, result has 0.9 percent of original size [2019-11-07 01:32:25,009 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 56 treesize of output 24 [2019-11-07 01:32:25,010 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-07 01:32:25,016 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-07 01:32:25,017 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 01:32:25,017 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:59, output treesize:8 [2019-11-07 01:32:25,053 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 01:32:25,096 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-11-07 01:32:25,096 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:32:25,124 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 01:32:25,169 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 01:32:25,213 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 01:32:25,249 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 01:32:25,293 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 01:32:25,304 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 01:32:25,313 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 01:32:25,314 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2019-11-07 01:32:25,326 INFO L567 ElimStorePlain]: treesize reduction 15, result has 44.4 percent of original size [2019-11-07 01:32:25,326 INFO L496 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-07 01:32:25,334 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-07 01:32:25,337 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 01:32:25,344 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 01:32:25,344 INFO L496 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2019-11-07 01:32:25,355 INFO L567 ElimStorePlain]: treesize reduction 10, result has 56.5 percent of original size [2019-11-07 01:32:25,355 INFO L496 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2019-11-07 01:32:25,364 INFO L567 ElimStorePlain]: treesize reduction 12, result has 52.0 percent of original size [2019-11-07 01:32:25,365 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 01:32:25,365 INFO L221 ElimStorePlain]: Needed 5 recursive calls to eliminate 7 variables, input treesize:37, output treesize:13 [2019-11-07 01:32:25,422 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-11-07 01:32:25,422 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1542144865] [2019-11-07 01:32:25,448 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2019-11-07 01:32:25,448 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 01:32:25,454 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 01:32:25,461 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 01:32:25,462 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 01:32:25,587 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 30 for LOIs [2019-11-07 01:32:25,650 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-11-07 01:32:25,749 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-11-07 01:32:29,298 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-11-07 01:32:29,303 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-11-07 01:32:29,307 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-11-07 01:32:29,379 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 35 for LOIs [2019-11-07 01:32:29,388 INFO L197 IcfgInterpreter]: Interpreting procedure ReadFromPort with input of size 1 for LOIs [2019-11-07 01:32:29,389 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 16 for LOIs [2019-11-07 01:32:29,391 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 01:32:29,952 WARN L191 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 49 [2019-11-07 01:32:30,270 WARN L191 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 37 [2019-11-07 01:32:30,780 WARN L191 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 38 [2019-11-07 01:32:31,162 WARN L191 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 48 [2019-11-07 01:32:31,577 WARN L191 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 52 [2019-11-07 01:32:32,100 WARN L191 SmtUtils]: Spent 391.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 56 [2019-11-07 01:32:32,678 WARN L191 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 48 [2019-11-07 01:32:33,122 WARN L191 SmtUtils]: Spent 334.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 52 [2019-11-07 01:32:33,586 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-07 01:32:33,587 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13, 9, 24] total 47 [2019-11-07 01:32:33,588 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041999048] [2019-11-07 01:32:33,590 INFO L442 AbstractCegarLoop]: Interpolant automaton has 47 states [2019-11-07 01:32:33,590 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:32:33,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2019-11-07 01:32:33,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=1954, Unknown=0, NotChecked=0, Total=2162 [2019-11-07 01:32:33,593 INFO L87 Difference]: Start difference. First operand 30 states and 35 transitions. Second operand 47 states. [2019-11-07 01:32:33,937 WARN L191 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 61 [2019-11-07 01:32:34,297 WARN L191 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 67 [2019-11-07 01:32:34,699 WARN L191 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 56 [2019-11-07 01:32:35,020 WARN L191 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 63 [2019-11-07 01:32:35,382 WARN L191 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 66 [2019-11-07 01:32:35,743 WARN L191 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 70 [2019-11-07 01:32:36,145 WARN L191 SmtUtils]: Spent 291.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 76 [2019-11-07 01:32:36,526 WARN L191 SmtUtils]: Spent 286.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 73 [2019-11-07 01:32:36,950 WARN L191 SmtUtils]: Spent 299.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 77 [2019-11-07 01:32:37,149 WARN L191 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 64 [2019-11-07 01:32:37,490 WARN L191 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 74 [2019-11-07 01:32:37,637 WARN L191 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 58 [2019-11-07 01:32:38,047 WARN L191 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 54 [2019-11-07 01:32:38,436 WARN L191 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 78 [2019-11-07 01:32:38,760 WARN L191 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 78 [2019-11-07 01:32:39,166 WARN L191 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 86 [2019-11-07 01:32:39,530 WARN L191 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 61 [2019-11-07 01:32:39,944 WARN L191 SmtUtils]: Spent 309.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 89 [2019-11-07 01:32:40,397 WARN L191 SmtUtils]: Spent 325.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 93 [2019-11-07 01:32:40,895 WARN L191 SmtUtils]: Spent 368.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 98 [2019-11-07 01:32:41,286 WARN L191 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 86 [2019-11-07 01:32:41,999 WARN L191 SmtUtils]: Spent 309.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 90 [2019-11-07 01:32:42,405 WARN L191 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 68 [2019-11-07 01:32:42,642 WARN L191 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 73 [2019-11-07 01:32:42,873 WARN L191 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 73 [2019-11-07 01:32:43,193 WARN L191 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 81 [2019-11-07 01:32:43,602 WARN L191 SmtUtils]: Spent 289.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 84 [2019-11-07 01:32:43,972 WARN L191 SmtUtils]: Spent 303.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 88 [2019-11-07 01:32:44,400 WARN L191 SmtUtils]: Spent 328.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 93 [2019-11-07 01:32:44,730 WARN L191 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 81 [2019-11-07 01:32:45,161 WARN L191 SmtUtils]: Spent 318.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 85 [2019-11-07 01:32:45,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:32:45,168 INFO L93 Difference]: Finished difference Result 66 states and 84 transitions. [2019-11-07 01:32:45,169 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2019-11-07 01:32:45,169 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 34 [2019-11-07 01:32:45,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:32:45,172 INFO L225 Difference]: With dead ends: 66 [2019-11-07 01:32:45,172 INFO L226 Difference]: Without dead ends: 64 [2019-11-07 01:32:45,176 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 62 SyntacticMatches, 7 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2007 ImplicationChecksByTransitivity, 14.4s TimeCoverageRelationStatistics Valid=876, Invalid=6956, Unknown=0, NotChecked=0, Total=7832 [2019-11-07 01:32:45,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2019-11-07 01:32:45,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 42. [2019-11-07 01:32:45,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-11-07 01:32:45,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 49 transitions. [2019-11-07 01:32:45,194 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 49 transitions. Word has length 34 [2019-11-07 01:32:45,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:32:45,195 INFO L462 AbstractCegarLoop]: Abstraction has 42 states and 49 transitions. [2019-11-07 01:32:45,195 INFO L463 AbstractCegarLoop]: Interpolant automaton has 47 states. [2019-11-07 01:32:45,195 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 49 transitions. [2019-11-07 01:32:45,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2019-11-07 01:32:45,197 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:32:45,197 INFO L410 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 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 01:32:45,401 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:32:45,402 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:32:45,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:32:45,402 INFO L82 PathProgramCache]: Analyzing trace with hash 1992883376, now seen corresponding path program 1 times [2019-11-07 01:32:45,402 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:32:45,402 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169043661] [2019-11-07 01:32:45,403 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:32:45,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:32:45,728 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 6 proven. 16 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2019-11-07 01:32:45,728 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169043661] [2019-11-07 01:32:45,728 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [802538189] [2019-11-07 01:32:45,729 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 01:32:45,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:32:45,817 INFO L256 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 25 conjunts are in the unsatisfiable core [2019-11-07 01:32:45,822 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:32:46,236 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 6 proven. 16 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2019-11-07 01:32:46,237 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:32:46,412 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 6 proven. 16 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2019-11-07 01:32:46,412 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1892679686] [2019-11-07 01:32:46,414 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2019-11-07 01:32:46,415 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 01:32:46,415 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 01:32:46,415 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 01:32:46,416 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 01:32:46,441 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 30 for LOIs [2019-11-07 01:32:46,499 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-11-07 01:32:46,539 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-11-07 01:32:49,720 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-11-07 01:32:49,726 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-11-07 01:32:49,732 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-11-07 01:32:49,802 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 78 for LOIs [2019-11-07 01:32:49,812 INFO L197 IcfgInterpreter]: Interpreting procedure ReadFromPort with input of size 1 for LOIs [2019-11-07 01:32:49,814 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 16 for LOIs [2019-11-07 01:32:49,816 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 01:32:50,622 WARN L191 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 49 [2019-11-07 01:32:50,840 WARN L191 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 28 [2019-11-07 01:32:51,077 WARN L191 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 37 [2019-11-07 01:32:51,363 WARN L191 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 34 [2019-11-07 01:32:51,589 WARN L191 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 34 [2019-11-07 01:32:51,844 WARN L191 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 38 [2019-11-07 01:32:52,413 WARN L191 SmtUtils]: Spent 399.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 48 [2019-11-07 01:32:52,780 WARN L191 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 52 [2019-11-07 01:32:53,259 WARN L191 SmtUtils]: Spent 358.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 56 [2019-11-07 01:32:53,455 WARN L191 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 38 [2019-11-07 01:32:53,860 WARN L191 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 48 [2019-11-07 01:32:54,266 WARN L191 SmtUtils]: Spent 296.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 54 [2019-11-07 01:32:54,568 WARN L191 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 34 [2019-11-07 01:32:55,010 WARN L191 SmtUtils]: Spent 317.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 43 [2019-11-07 01:32:55,701 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-07 01:32:55,701 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 12, 25] total 51 [2019-11-07 01:32:55,702 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156731912] [2019-11-07 01:32:55,703 INFO L442 AbstractCegarLoop]: Interpolant automaton has 51 states [2019-11-07 01:32:55,704 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:32:55,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2019-11-07 01:32:55,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=2324, Unknown=0, NotChecked=0, Total=2550 [2019-11-07 01:32:55,705 INFO L87 Difference]: Start difference. First operand 42 states and 49 transitions. Second operand 51 states. [2019-11-07 01:32:56,049 WARN L191 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 61 [2019-11-07 01:32:56,361 WARN L191 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 67 [2019-11-07 01:32:57,005 WARN L191 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 58 [2019-11-07 01:32:57,347 WARN L191 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 61 [2019-11-07 01:32:57,683 WARN L191 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 71 [2019-11-07 01:32:58,045 WARN L191 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 77 [2019-11-07 01:32:58,351 WARN L191 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 68