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/ai/svcomp-Reach-32bit-Automizer_Default+AIv2_INT.epf -i ../../../trunk/examples/svcomp/array-tiling/mbpr3.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fea9116 [2019-09-20 13:26:31,746 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-20 13:26:31,748 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-20 13:26:31,760 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-09-20 13:26:31,770 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-20 13:26:31,771 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-20 13:26:31,772 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-20 13:26:31,773 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-20 13:26:31,774 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-20 13:26:31,775 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-20 13:26:31,777 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-20 13:26:31,779 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-20 13:26:31,781 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-20 13:26:31,782 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-20 13:26:31,783 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-20 13:26:31,784 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-20 13:26:31,787 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-09-20 13:26:31,795 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-20 13:26:31,796 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-20 13:26:31,797 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-20 13:26:31,797 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/svcomp-Reach-32bit-Automizer_Default+AIv2_INT.epf [2019-09-20 13:26:31,813 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-20 13:26:31,814 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-20 13:26:31,814 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-09-20 13:26:31,814 INFO L138 SettingsManager]: * Log level for plugins=info [2019-09-20 13:26:31,815 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-09-20 13:26:31,815 INFO L138 SettingsManager]: * User list type=DISABLED [2019-09-20 13:26:31,815 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-09-20 13:26:31,816 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-09-20 13:26:31,816 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-09-20 13:26:31,816 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-09-20 13:26:31,817 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-20 13:26:31,817 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-20 13:26:31,817 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-20 13:26:31,817 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-20 13:26:31,817 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-20 13:26:31,818 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-20 13:26:31,818 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-20 13:26:31,818 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-20 13:26:31,818 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-20 13:26:31,818 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-20 13:26:31,819 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-20 13:26:31,819 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-09-20 13:26:31,819 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-20 13:26:31,819 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-20 13:26:31,820 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-20 13:26:31,820 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-20 13:26:31,820 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-09-20 13:26:31,820 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-20 13:26:31,820 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-20 13:26:31,820 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-09-20 13:26:31,859 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-20 13:26:31,873 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-20 13:26:31,879 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-20 13:26:31,881 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-20 13:26:31,881 INFO L275 PluginConnector]: CDTParser initialized [2019-09-20 13:26:31,882 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-tiling/mbpr3.c [2019-09-20 13:26:31,956 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/54d1fa57b/7948ddc4e7e84627ae7fcdc8383086f3/FLAGa1e07395b [2019-09-20 13:26:32,411 INFO L306 CDTParser]: Found 1 translation units. [2019-09-20 13:26:32,412 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-tiling/mbpr3.c [2019-09-20 13:26:32,420 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/54d1fa57b/7948ddc4e7e84627ae7fcdc8383086f3/FLAGa1e07395b [2019-09-20 13:26:32,791 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/54d1fa57b/7948ddc4e7e84627ae7fcdc8383086f3 [2019-09-20 13:26:32,801 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-20 13:26:32,803 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-20 13:26:32,804 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-20 13:26:32,804 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-20 13:26:32,808 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-20 13:26:32,809 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 01:26:32" (1/1) ... [2019-09-20 13:26:32,812 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@377f0a5a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:26:32, skipping insertion in model container [2019-09-20 13:26:32,812 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 01:26:32" (1/1) ... [2019-09-20 13:26:32,820 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-20 13:26:32,840 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-20 13:26:33,063 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-20 13:26:33,067 INFO L188 MainTranslator]: Completed pre-run [2019-09-20 13:26:33,097 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-20 13:26:33,206 INFO L192 MainTranslator]: Completed translation [2019-09-20 13:26:33,206 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:26:33 WrapperNode [2019-09-20 13:26:33,206 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-20 13:26:33,207 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-20 13:26:33,207 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-20 13:26:33,207 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-20 13:26:33,217 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:26:33" (1/1) ... [2019-09-20 13:26:33,217 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:26:33" (1/1) ... [2019-09-20 13:26:33,228 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:26:33" (1/1) ... [2019-09-20 13:26:33,229 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:26:33" (1/1) ... [2019-09-20 13:26:33,249 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:26:33" (1/1) ... [2019-09-20 13:26:33,256 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:26:33" (1/1) ... [2019-09-20 13:26:33,258 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:26:33" (1/1) ... [2019-09-20 13:26:33,261 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-20 13:26:33,261 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-20 13:26:33,262 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-20 13:26:33,262 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-20 13:26:33,263 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:26:33" (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 [2019-09-20 13:26:33,314 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-20 13:26:33,315 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-20 13:26:33,315 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-09-20 13:26:33,315 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-20 13:26:33,315 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-20 13:26:33,315 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-09-20 13:26:33,315 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-09-20 13:26:33,315 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-20 13:26:33,316 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-20 13:26:33,316 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-09-20 13:26:33,316 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-09-20 13:26:33,316 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-09-20 13:26:33,316 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-09-20 13:26:33,317 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-20 13:26:33,317 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-20 13:26:33,694 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-20 13:26:33,695 INFO L283 CfgBuilder]: Removed 4 assume(true) statements. [2019-09-20 13:26:33,696 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 01:26:33 BoogieIcfgContainer [2019-09-20 13:26:33,696 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-20 13:26:33,697 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-20 13:26:33,697 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-20 13:26:33,700 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-20 13:26:33,700 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.09 01:26:32" (1/3) ... [2019-09-20 13:26:33,701 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7826364e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 01:26:33, skipping insertion in model container [2019-09-20 13:26:33,701 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:26:33" (2/3) ... [2019-09-20 13:26:33,702 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7826364e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 01:26:33, skipping insertion in model container [2019-09-20 13:26:33,702 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 01:26:33" (3/3) ... [2019-09-20 13:26:33,704 INFO L109 eAbstractionObserver]: Analyzing ICFG mbpr3.c [2019-09-20 13:26:33,711 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-20 13:26:33,719 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-20 13:26:33,736 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-20 13:26:33,762 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-20 13:26:33,762 INFO L378 AbstractCegarLoop]: Hoare is false [2019-09-20 13:26:33,762 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-20 13:26:33,763 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-20 13:26:33,763 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-20 13:26:33,763 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-20 13:26:33,763 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-20 13:26:33,763 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-20 13:26:33,777 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states. [2019-09-20 13:26:33,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-09-20 13:26:33,788 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 13:26:33,789 INFO L407 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 13:26:33,791 INFO L418 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 13:26:33,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 13:26:33,797 INFO L82 PathProgramCache]: Analyzing trace with hash -1164915713, now seen corresponding path program 1 times [2019-09-20 13:26:33,799 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-20 13:26:33,854 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:26:33,854 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 13:26:33,854 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:26:33,855 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-20 13:26:33,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 13:26:33,960 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-20 13:26:33,962 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-20 13:26:33,962 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-09-20 13:26:33,963 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-20 13:26:33,968 INFO L454 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-09-20 13:26:33,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-09-20 13:26:33,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-20 13:26:33,987 INFO L87 Difference]: Start difference. First operand 40 states. Second operand 2 states. [2019-09-20 13:26:34,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 13:26:34,010 INFO L93 Difference]: Finished difference Result 40 states and 49 transitions. [2019-09-20 13:26:34,010 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-09-20 13:26:34,012 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 20 [2019-09-20 13:26:34,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 13:26:34,024 INFO L225 Difference]: With dead ends: 40 [2019-09-20 13:26:34,024 INFO L226 Difference]: Without dead ends: 34 [2019-09-20 13:26:34,026 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-20 13:26:34,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2019-09-20 13:26:34,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2019-09-20 13:26:34,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-09-20 13:26:34,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 41 transitions. [2019-09-20 13:26:34,072 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 41 transitions. Word has length 20 [2019-09-20 13:26:34,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 13:26:34,072 INFO L475 AbstractCegarLoop]: Abstraction has 34 states and 41 transitions. [2019-09-20 13:26:34,072 INFO L476 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-09-20 13:26:34,073 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 41 transitions. [2019-09-20 13:26:34,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-09-20 13:26:34,074 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 13:26:34,074 INFO L407 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 13:26:34,075 INFO L418 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 13:26:34,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 13:26:34,075 INFO L82 PathProgramCache]: Analyzing trace with hash 208061977, now seen corresponding path program 1 times [2019-09-20 13:26:34,075 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-20 13:26:34,078 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:26:34,078 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 13:26:34,078 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:26:34,078 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-20 13:26:34,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 13:26:34,262 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-20 13:26:34,265 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-20 13:26:34,266 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-09-20 13:26:34,266 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-20 13:26:34,270 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-20 13:26:34,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-20 13:26:34,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-09-20 13:26:34,271 INFO L87 Difference]: Start difference. First operand 34 states and 41 transitions. Second operand 5 states. [2019-09-20 13:26:34,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 13:26:34,352 INFO L93 Difference]: Finished difference Result 40 states and 47 transitions. [2019-09-20 13:26:34,353 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-09-20 13:26:34,353 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2019-09-20 13:26:34,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 13:26:34,355 INFO L225 Difference]: With dead ends: 40 [2019-09-20 13:26:34,355 INFO L226 Difference]: Without dead ends: 40 [2019-09-20 13:26:34,356 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-09-20 13:26:34,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2019-09-20 13:26:34,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2019-09-20 13:26:34,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-09-20 13:26:34,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 46 transitions. [2019-09-20 13:26:34,364 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 46 transitions. Word has length 20 [2019-09-20 13:26:34,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 13:26:34,365 INFO L475 AbstractCegarLoop]: Abstraction has 39 states and 46 transitions. [2019-09-20 13:26:34,365 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-20 13:26:34,365 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 46 transitions. [2019-09-20 13:26:34,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-09-20 13:26:34,366 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 13:26:34,366 INFO L407 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 13:26:34,367 INFO L418 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 13:26:34,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 13:26:34,367 INFO L82 PathProgramCache]: Analyzing trace with hash 209909019, now seen corresponding path program 1 times [2019-09-20 13:26:34,367 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-20 13:26:34,369 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:26:34,369 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 13:26:34,370 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:26:34,370 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-20 13:26:34,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 13:26:34,632 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-20 13:26:34,633 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-20 13:26:34,633 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-09-20 13:26:34,633 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-20 13:26:34,634 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-09-20 13:26:34,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-09-20 13:26:34,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-20 13:26:34,634 INFO L87 Difference]: Start difference. First operand 39 states and 46 transitions. Second operand 4 states. [2019-09-20 13:26:34,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 13:26:34,756 INFO L93 Difference]: Finished difference Result 43 states and 51 transitions. [2019-09-20 13:26:34,757 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-20 13:26:34,758 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2019-09-20 13:26:34,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 13:26:34,764 INFO L225 Difference]: With dead ends: 43 [2019-09-20 13:26:34,764 INFO L226 Difference]: Without dead ends: 43 [2019-09-20 13:26:34,765 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-20 13:26:34,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2019-09-20 13:26:34,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 40. [2019-09-20 13:26:34,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2019-09-20 13:26:34,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 47 transitions. [2019-09-20 13:26:34,778 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 47 transitions. Word has length 20 [2019-09-20 13:26:34,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 13:26:34,779 INFO L475 AbstractCegarLoop]: Abstraction has 40 states and 47 transitions. [2019-09-20 13:26:34,780 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-09-20 13:26:34,780 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 47 transitions. [2019-09-20 13:26:34,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-09-20 13:26:34,783 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 13:26:34,783 INFO L407 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 13:26:34,784 INFO L418 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 13:26:34,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 13:26:34,784 INFO L82 PathProgramCache]: Analyzing trace with hash 2624448, now seen corresponding path program 1 times [2019-09-20 13:26:34,785 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-20 13:26:34,789 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:26:34,790 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 13:26:34,790 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:26:34,790 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-20 13:26:34,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 13:26:35,108 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-09-20 13:26:35,108 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-20 13:26:35,109 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-09-20 13:26:35,109 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-20 13:26:35,109 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-20 13:26:35,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-20 13:26:35,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-09-20 13:26:35,111 INFO L87 Difference]: Start difference. First operand 40 states and 47 transitions. Second operand 5 states. [2019-09-20 13:26:35,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 13:26:35,247 INFO L93 Difference]: Finished difference Result 51 states and 61 transitions. [2019-09-20 13:26:35,247 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-09-20 13:26:35,248 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 24 [2019-09-20 13:26:35,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 13:26:35,249 INFO L225 Difference]: With dead ends: 51 [2019-09-20 13:26:35,249 INFO L226 Difference]: Without dead ends: 51 [2019-09-20 13:26:35,250 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 3 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-09-20 13:26:35,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2019-09-20 13:26:35,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 42. [2019-09-20 13:26:35,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-09-20 13:26:35,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 49 transitions. [2019-09-20 13:26:35,256 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 49 transitions. Word has length 24 [2019-09-20 13:26:35,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 13:26:35,257 INFO L475 AbstractCegarLoop]: Abstraction has 42 states and 49 transitions. [2019-09-20 13:26:35,257 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-20 13:26:35,257 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 49 transitions. [2019-09-20 13:26:35,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-09-20 13:26:35,258 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 13:26:35,258 INFO L407 BasicCegarLoop]: trace histogram [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, 1, 1, 1] [2019-09-20 13:26:35,259 INFO L418 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 13:26:35,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 13:26:35,259 INFO L82 PathProgramCache]: Analyzing trace with hash -342662518, now seen corresponding path program 1 times [2019-09-20 13:26:35,259 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-20 13:26:35,261 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:26:35,261 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 13:26:35,261 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:26:35,261 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-20 13:26:35,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 13:26:35,369 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-09-20 13:26:35,369 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-20 13:26:35,369 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-20 13:26:35,369 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-20 13:26:35,370 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-20 13:26:35,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-20 13:26:35,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-20 13:26:35,371 INFO L87 Difference]: Start difference. First operand 42 states and 49 transitions. Second operand 3 states. [2019-09-20 13:26:35,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 13:26:35,391 INFO L93 Difference]: Finished difference Result 42 states and 48 transitions. [2019-09-20 13:26:35,392 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-20 13:26:35,392 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 32 [2019-09-20 13:26:35,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 13:26:35,393 INFO L225 Difference]: With dead ends: 42 [2019-09-20 13:26:35,394 INFO L226 Difference]: Without dead ends: 42 [2019-09-20 13:26:35,395 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-20 13:26:35,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2019-09-20 13:26:35,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2019-09-20 13:26:35,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-09-20 13:26:35,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 48 transitions. [2019-09-20 13:26:35,407 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 48 transitions. Word has length 32 [2019-09-20 13:26:35,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 13:26:35,407 INFO L475 AbstractCegarLoop]: Abstraction has 42 states and 48 transitions. [2019-09-20 13:26:35,407 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-20 13:26:35,407 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 48 transitions. [2019-09-20 13:26:35,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-09-20 13:26:35,410 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 13:26:35,410 INFO L407 BasicCegarLoop]: trace histogram [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, 1, 1, 1] [2019-09-20 13:26:35,411 INFO L418 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 13:26:35,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 13:26:35,411 INFO L82 PathProgramCache]: Analyzing trace with hash 358402060, now seen corresponding path program 1 times [2019-09-20 13:26:35,411 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-20 13:26:35,413 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:26:35,414 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 13:26:35,414 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:26:35,414 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-20 13:26:35,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 13:26:36,139 WARN L191 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 35 [2019-09-20 13:26:36,734 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-20 13:26:36,735 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-20 13:26:36,735 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-20 13:26:36,736 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 33 with the following transitions: [2019-09-20 13:26:36,738 INFO L207 CegarAbsIntRunner]: [0], [1], [5], [8], [12], [18], [20], [23], [27], [29], [33], [39], [41], [44], [48], [50], [54], [60], [62], [67], [69], [71], [75], [83], [88], [103], [106], [108], [114], [115], [116], [118] [2019-09-20 13:26:36,775 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-20 13:26:36,775 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-20 13:26:36,868 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-09-20 13:26:36,870 INFO L272 AbstractInterpreter]: Visited 7 different actions 7 times. Never merged. Never widened. Performed 22 root evaluator evaluations with a maximum evaluation depth of 2. Performed 22 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Never found a fixpoint. Largest state had 34 variables. [2019-09-20 13:26:36,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 13:26:36,875 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-09-20 13:26:36,931 INFO L227 lantSequenceWeakener]: Weakened 5 states. On average, predicates are now at 96.67% of their original sizes. [2019-09-20 13:26:36,931 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-09-20 13:26:36,939 INFO L420 sIntCurrentIteration]: We unified 31 AI predicates to 31 [2019-09-20 13:26:36,939 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-09-20 13:26:36,940 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-20 13:26:36,940 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [15] total 16 [2019-09-20 13:26:36,940 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-20 13:26:36,941 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-20 13:26:36,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-20 13:26:36,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-20 13:26:36,941 INFO L87 Difference]: Start difference. First operand 42 states and 48 transitions. Second operand 3 states. [2019-09-20 13:26:36,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 13:26:36,943 INFO L93 Difference]: Finished difference Result 7 states and 6 transitions. [2019-09-20 13:26:36,943 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-20 13:26:36,944 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 32 [2019-09-20 13:26:36,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 13:26:36,944 INFO L225 Difference]: With dead ends: 7 [2019-09-20 13:26:36,944 INFO L226 Difference]: Without dead ends: 0 [2019-09-20 13:26:36,945 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-20 13:26:36,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-09-20 13:26:36,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-09-20 13:26:36,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-09-20 13:26:36,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-09-20 13:26:36,949 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 32 [2019-09-20 13:26:36,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 13:26:36,950 INFO L475 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-09-20 13:26:36,950 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-20 13:26:36,950 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-09-20 13:26:36,950 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-09-20 13:26:36,960 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.09 01:26:36 BoogieIcfgContainer [2019-09-20 13:26:36,961 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-09-20 13:26:36,966 INFO L168 Benchmark]: Toolchain (without parser) took 4162.66 ms. Allocated memory was 131.1 MB in the beginning and 268.4 MB in the end (delta: 137.4 MB). Free memory was 86.3 MB in the beginning and 191.3 MB in the end (delta: -105.0 MB). Peak memory consumption was 32.4 MB. Max. memory is 7.1 GB. [2019-09-20 13:26:36,967 INFO L168 Benchmark]: CDTParser took 1.20 ms. Allocated memory is still 131.1 MB. Free memory was 105.1 MB in the beginning and 104.9 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. [2019-09-20 13:26:36,968 INFO L168 Benchmark]: CACSL2BoogieTranslator took 402.41 ms. Allocated memory was 131.1 MB in the beginning and 199.2 MB in the end (delta: 68.2 MB). Free memory was 86.1 MB in the beginning and 175.4 MB in the end (delta: -89.3 MB). Peak memory consumption was 26.1 MB. Max. memory is 7.1 GB. [2019-09-20 13:26:36,969 INFO L168 Benchmark]: Boogie Preprocessor took 54.26 ms. Allocated memory is still 199.2 MB. Free memory was 175.4 MB in the beginning and 173.4 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. [2019-09-20 13:26:36,970 INFO L168 Benchmark]: RCFGBuilder took 434.67 ms. Allocated memory is still 199.2 MB. Free memory was 173.4 MB in the beginning and 153.4 MB in the end (delta: 20.0 MB). Peak memory consumption was 20.0 MB. Max. memory is 7.1 GB. [2019-09-20 13:26:36,971 INFO L168 Benchmark]: TraceAbstraction took 3263.56 ms. Allocated memory was 199.2 MB in the beginning and 268.4 MB in the end (delta: 69.2 MB). Free memory was 153.4 MB in the beginning and 191.3 MB in the end (delta: -37.9 MB). Peak memory consumption was 31.4 MB. Max. memory is 7.1 GB. [2019-09-20 13:26:36,975 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.20 ms. Allocated memory is still 131.1 MB. Free memory was 105.1 MB in the beginning and 104.9 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 402.41 ms. Allocated memory was 131.1 MB in the beginning and 199.2 MB in the end (delta: 68.2 MB). Free memory was 86.1 MB in the beginning and 175.4 MB in the end (delta: -89.3 MB). Peak memory consumption was 26.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 54.26 ms. Allocated memory is still 199.2 MB. Free memory was 175.4 MB in the beginning and 173.4 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 434.67 ms. Allocated memory is still 199.2 MB. Free memory was 173.4 MB in the beginning and 153.4 MB in the end (delta: 20.0 MB). Peak memory consumption was 20.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 3263.56 ms. Allocated memory was 199.2 MB in the beginning and 268.4 MB in the end (delta: 69.2 MB). Free memory was 153.4 MB in the beginning and 191.3 MB in the end (delta: -37.9 MB). Peak memory consumption was 31.4 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 3]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 40 locations, 1 error locations. SAFE Result, 3.2s OverallTime, 6 OverallIterations, 1 TraceHistogramMax, 0.4s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 178 SDtfs, 152 SDslu, 150 SDs, 0 SdLazy, 110 SolverSat, 13 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 56 GetRequests, 40 SyntacticMatches, 5 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=42occurred in iteration=4, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.1s AbstIntTime, 1 AbstIntIterations, 1 AbstIntStrong, 0.9569892473118279 AbsIntWeakeningRatio, 0.9354838709677419 AbsIntAvgWeakeningVarsNumRemoved, 0.5161290322580645 AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 6 MinimizatonAttempts, 13 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.9s InterpolantComputationTime, 148 NumberOfCodeBlocks, 148 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 142 ConstructedInterpolants, 0 QuantifiedInterpolants, 33812 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 6 InterpolantComputations, 5 PerfectInterpolantSequences, 4/7 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...