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 --abstractinterpretationv2.abstract.domain IntervalDomain --traceabstraction.trace.refinement.strategy TAIPAN --traceabstraction.abstract.interpretation.mode USE_PREDICATES -i ../../../trunk/examples/svcomp/eca-rers2012/Problem01_label04.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 23:53:01,681 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 23:53:01,684 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 23:53:01,695 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 23:53:01,696 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 23:53:01,697 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 23:53:01,698 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 23:53:01,700 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 23:53:01,701 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 23:53:01,702 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 23:53:01,703 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 23:53:01,704 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 23:53:01,704 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 23:53:01,705 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 23:53:01,706 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 23:53:01,707 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 23:53:01,708 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 23:53:01,709 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 23:53:01,711 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 23:53:01,713 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 23:53:01,714 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 23:53:01,715 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 23:53:01,716 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 23:53:01,717 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 23:53:01,719 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-14 23:53:01,726 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 23:53:01,727 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 23:53:01,728 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 23:53:01,729 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-14 23:53:01,748 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 23:53:01,748 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 23:53:01,751 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 23:53:01,751 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 23:53:01,751 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 23:53:01,751 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 23:53:01,751 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 23:53:01,752 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 23:53:01,752 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 23:53:01,752 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 23:53:01,752 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 23:53:01,752 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 23:53:01,753 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 23:53:01,753 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 23:53:01,753 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 23:53:01,753 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 23:53:01,753 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 23:53:01,754 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 23:53:01,754 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 23:53:01,754 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 23:53:01,754 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 23:53:01,754 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 23:53:01,755 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 23:53:01,755 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 23:53:01,755 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 23:53:01,755 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 23:53:01,755 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 23:53:01,756 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 23:53:01,756 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2: Abstract domain -> IntervalDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Abstract interpretation Mode -> USE_PREDICATES [2019-10-14 23:53:02,014 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 23:53:02,031 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 23:53:02,035 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 23:53:02,036 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 23:53:02,036 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 23:53:02,037 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem01_label04.c [2019-10-14 23:53:02,107 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e615aa672/759e00936949431ba6d1dfaef124932c/FLAG27b213081 [2019-10-14 23:53:02,674 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 23:53:02,674 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem01_label04.c [2019-10-14 23:53:02,686 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e615aa672/759e00936949431ba6d1dfaef124932c/FLAG27b213081 [2019-10-14 23:53:02,966 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e615aa672/759e00936949431ba6d1dfaef124932c [2019-10-14 23:53:02,976 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 23:53:02,977 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 23:53:02,978 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 23:53:02,979 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 23:53:02,982 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 23:53:02,983 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:53:02" (1/1) ... [2019-10-14 23:53:02,985 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@a725cc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:53:02, skipping insertion in model container [2019-10-14 23:53:02,986 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:53:02" (1/1) ... [2019-10-14 23:53:02,993 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 23:53:03,034 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 23:53:03,527 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 23:53:03,533 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 23:53:03,638 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 23:53:03,656 INFO L192 MainTranslator]: Completed translation [2019-10-14 23:53:03,657 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:53:03 WrapperNode [2019-10-14 23:53:03,657 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 23:53:03,658 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 23:53:03,658 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 23:53:03,658 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 23:53:03,672 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:53:03" (1/1) ... [2019-10-14 23:53:03,673 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:53:03" (1/1) ... [2019-10-14 23:53:03,700 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:53:03" (1/1) ... [2019-10-14 23:53:03,700 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:53:03" (1/1) ... [2019-10-14 23:53:03,758 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:53:03" (1/1) ... [2019-10-14 23:53:03,769 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:53:03" (1/1) ... [2019-10-14 23:53:03,773 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:53:03" (1/1) ... [2019-10-14 23:53:03,779 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 23:53:03,780 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 23:53:03,780 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 23:53:03,780 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 23:53:03,781 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:53:03" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 23:53:03,842 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 23:53:03,842 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 23:53:03,842 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-14 23:53:03,842 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 23:53:03,842 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-14 23:53:03,842 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 23:53:03,843 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-14 23:53:03,843 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-14 23:53:03,843 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 23:53:03,843 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 23:53:03,843 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 23:53:04,956 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 23:53:04,956 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-14 23:53:04,963 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:53:04 BoogieIcfgContainer [2019-10-14 23:53:04,963 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 23:53:04,965 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 23:53:04,965 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 23:53:04,970 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 23:53:04,970 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 11:53:02" (1/3) ... [2019-10-14 23:53:04,971 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26ff253f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:53:04, skipping insertion in model container [2019-10-14 23:53:04,971 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:53:03" (2/3) ... [2019-10-14 23:53:04,972 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26ff253f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:53:04, skipping insertion in model container [2019-10-14 23:53:04,973 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:53:04" (3/3) ... [2019-10-14 23:53:04,980 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem01_label04.c [2019-10-14 23:53:04,996 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 23:53:05,008 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 23:53:05,022 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 23:53:05,063 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 23:53:05,063 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 23:53:05,065 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 23:53:05,065 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 23:53:05,065 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 23:53:05,066 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 23:53:05,066 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 23:53:05,066 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 23:53:05,101 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states. [2019-10-14 23:53:05,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2019-10-14 23:53:05,117 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:53:05,118 INFO L380 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, 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, 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, 1, 1, 1, 1, 1, 1] [2019-10-14 23:53:05,120 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:53:05,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:53:05,126 INFO L82 PathProgramCache]: Analyzing trace with hash -756584794, now seen corresponding path program 1 times [2019-10-14 23:53:05,135 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:53:05,136 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167845619] [2019-10-14 23:53:05,136 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:53:05,136 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:53:05,137 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:53:05,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:53:05,691 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:53:05,692 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167845619] [2019-10-14 23:53:05,693 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:53:05,693 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-14 23:53:05,694 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224300956] [2019-10-14 23:53:05,698 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 23:53:05,700 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-14 23:53:05,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 23:53:05,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 23:53:05,718 INFO L87 Difference]: Start difference. First operand 207 states. Second operand 3 states. [2019-10-14 23:53:06,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:53:06,514 INFO L93 Difference]: Finished difference Result 547 states and 938 transitions. [2019-10-14 23:53:06,514 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 23:53:06,516 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 102 [2019-10-14 23:53:06,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:53:06,532 INFO L225 Difference]: With dead ends: 547 [2019-10-14 23:53:06,533 INFO L226 Difference]: Without dead ends: 278 [2019-10-14 23:53:06,539 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 3 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 23:53:06,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2019-10-14 23:53:06,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 278. [2019-10-14 23:53:06,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 278 states. [2019-10-14 23:53:06,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 394 transitions. [2019-10-14 23:53:06,614 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 394 transitions. Word has length 102 [2019-10-14 23:53:06,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:53:06,615 INFO L462 AbstractCegarLoop]: Abstraction has 278 states and 394 transitions. [2019-10-14 23:53:06,616 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 23:53:06,617 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 394 transitions. [2019-10-14 23:53:06,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2019-10-14 23:53:06,625 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:53:06,626 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 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, 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, 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, 1, 1, 1, 1] [2019-10-14 23:53:06,626 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:53:06,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:53:06,629 INFO L82 PathProgramCache]: Analyzing trace with hash -1399417091, now seen corresponding path program 1 times [2019-10-14 23:53:06,630 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:53:06,630 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010455077] [2019-10-14 23:53:06,630 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:53:06,630 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:53:06,630 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:53:06,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:53:06,797 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:53:06,797 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010455077] [2019-10-14 23:53:06,797 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:53:06,798 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-14 23:53:06,798 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091326521] [2019-10-14 23:53:06,800 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-14 23:53:06,800 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-14 23:53:06,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-14 23:53:06,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-14 23:53:06,801 INFO L87 Difference]: Start difference. First operand 278 states and 394 transitions. Second operand 6 states. [2019-10-14 23:53:07,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:53:07,553 INFO L93 Difference]: Finished difference Result 840 states and 1222 transitions. [2019-10-14 23:53:07,554 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 23:53:07,554 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 112 [2019-10-14 23:53:07,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:53:07,563 INFO L225 Difference]: With dead ends: 840 [2019-10-14 23:53:07,563 INFO L226 Difference]: Without dead ends: 568 [2019-10-14 23:53:07,565 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-10-14 23:53:07,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 568 states. [2019-10-14 23:53:07,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 568 to 556. [2019-10-14 23:53:07,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 556 states. [2019-10-14 23:53:07,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 556 states to 556 states and 784 transitions. [2019-10-14 23:53:07,623 INFO L78 Accepts]: Start accepts. Automaton has 556 states and 784 transitions. Word has length 112 [2019-10-14 23:53:07,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:53:07,624 INFO L462 AbstractCegarLoop]: Abstraction has 556 states and 784 transitions. [2019-10-14 23:53:07,624 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-14 23:53:07,624 INFO L276 IsEmpty]: Start isEmpty. Operand 556 states and 784 transitions. [2019-10-14 23:53:07,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2019-10-14 23:53:07,627 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:53:07,628 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:53:07,628 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:53:07,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:53:07,628 INFO L82 PathProgramCache]: Analyzing trace with hash -860010770, now seen corresponding path program 1 times [2019-10-14 23:53:07,629 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:53:07,629 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148998697] [2019-10-14 23:53:07,629 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:53:07,629 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:53:07,629 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:53:07,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:53:07,733 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 37 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:53:07,734 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148998697] [2019-10-14 23:53:07,734 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [793158923] [2019-10-14 23:53:07,734 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:53:07,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:53:07,873 INFO L256 TraceCheckSpWp]: Trace formula consists of 421 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-14 23:53:07,893 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:53:07,946 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 37 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:53:07,946 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-14 23:53:08,049 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 37 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:53:08,049 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [2092452112] [2019-10-14 23:53:08,072 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 137 [2019-10-14 23:53:08,119 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-14 23:53:08,119 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2)