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/Problem10_label58.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 00:02:24,927 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 00:02:24,929 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 00:02:24,942 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 00:02:24,942 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 00:02:24,943 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 00:02:24,945 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 00:02:24,946 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 00:02:24,948 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 00:02:24,949 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 00:02:24,950 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 00:02:24,951 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 00:02:24,951 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 00:02:24,952 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 00:02:24,953 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 00:02:24,955 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 00:02:24,955 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 00:02:24,956 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 00:02:24,958 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 00:02:24,960 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 00:02:24,961 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 00:02:24,962 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 00:02:24,963 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 00:02:24,964 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 00:02:24,966 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 00:02:24,974 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 00:02:24,975 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 00:02:24,976 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 00:02:24,977 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 [2019-10-15 00:02:24,991 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 00:02:24,991 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 00:02:24,993 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 00:02:24,993 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 00:02:24,993 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 00:02:24,993 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 00:02:24,994 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 00:02:24,994 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 00:02:24,994 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 00:02:24,994 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 00:02:24,994 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 00:02:24,995 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 00:02:24,995 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 00:02:24,995 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 00:02:24,995 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 00:02:24,995 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 00:02:24,996 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 00:02:24,996 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 00:02:24,996 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 00:02:24,996 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 00:02:24,996 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 00:02:24,997 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 00:02:24,997 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 00:02:24,997 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 00:02:24,997 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 00:02:24,998 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 00:02:24,998 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 00:02:24,998 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 00:02:24,998 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 [2019-10-15 00:02:25,287 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 00:02:25,301 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 00:02:25,305 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 00:02:25,306 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 00:02:25,306 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 00:02:25,307 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem10_label58.c [2019-10-15 00:02:25,383 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a5bc5c5a7/5796cb4f5a984cd2803e7a36808b649e/FLAG20c024d83 [2019-10-15 00:02:25,998 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 00:02:25,998 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem10_label58.c [2019-10-15 00:02:26,016 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a5bc5c5a7/5796cb4f5a984cd2803e7a36808b649e/FLAG20c024d83 [2019-10-15 00:02:26,254 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a5bc5c5a7/5796cb4f5a984cd2803e7a36808b649e [2019-10-15 00:02:26,266 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 00:02:26,268 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 00:02:26,271 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 00:02:26,271 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 00:02:26,275 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 00:02:26,276 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 12:02:26" (1/1) ... [2019-10-15 00:02:26,279 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@644c4853 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:02:26, skipping insertion in model container [2019-10-15 00:02:26,279 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 12:02:26" (1/1) ... [2019-10-15 00:02:26,287 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 00:02:26,348 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 00:02:26,862 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 00:02:26,867 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 00:02:26,973 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 00:02:26,990 INFO L192 MainTranslator]: Completed translation [2019-10-15 00:02:26,990 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:02:26 WrapperNode [2019-10-15 00:02:26,991 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 00:02:26,991 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 00:02:26,992 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 00:02:26,992 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 00:02:27,005 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:02:26" (1/1) ... [2019-10-15 00:02:27,006 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:02:26" (1/1) ... [2019-10-15 00:02:27,025 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:02:26" (1/1) ... [2019-10-15 00:02:27,025 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:02:26" (1/1) ... [2019-10-15 00:02:27,063 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:02:26" (1/1) ... [2019-10-15 00:02:27,075 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:02:26" (1/1) ... [2019-10-15 00:02:27,081 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:02:26" (1/1) ... [2019-10-15 00:02:27,094 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 00:02:27,094 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 00:02:27,095 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 00:02:27,095 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 00:02:27,097 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:02:26" (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 [2019-10-15 00:02:27,165 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 00:02:27,166 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 00:02:27,166 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-15 00:02:27,166 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 00:02:27,166 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-15 00:02:27,167 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 00:02:27,167 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 00:02:27,168 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-15 00:02:27,168 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 00:02:27,168 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 00:02:27,169 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 00:02:28,427 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 00:02:28,428 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-15 00:02:28,429 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 12:02:28 BoogieIcfgContainer [2019-10-15 00:02:28,429 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 00:02:28,431 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 00:02:28,431 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 00:02:28,434 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 00:02:28,434 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 12:02:26" (1/3) ... [2019-10-15 00:02:28,435 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@424de46c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 12:02:28, skipping insertion in model container [2019-10-15 00:02:28,435 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:02:26" (2/3) ... [2019-10-15 00:02:28,436 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@424de46c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 12:02:28, skipping insertion in model container [2019-10-15 00:02:28,436 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 12:02:28" (3/3) ... [2019-10-15 00:02:28,438 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem10_label58.c [2019-10-15 00:02:28,448 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 00:02:28,457 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 00:02:28,468 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 00:02:28,497 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 00:02:28,497 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 00:02:28,497 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 00:02:28,498 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 00:02:28,499 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 00:02:28,499 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 00:02:28,499 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 00:02:28,499 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 00:02:28,533 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states. [2019-10-15 00:02:28,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-10-15 00:02:28,540 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:02:28,541 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 00:02:28,543 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:02:28,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:02:28,547 INFO L82 PathProgramCache]: Analyzing trace with hash -1079521594, now seen corresponding path program 1 times [2019-10-15 00:02:28,554 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:02:28,555 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078762972] [2019-10-15 00:02:28,555 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:02:28,555 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:02:28,556 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:02:28,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:02:28,799 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:02:28,799 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078762972] [2019-10-15 00:02:28,801 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:02:28,801 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-15 00:02:28,802 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097582018] [2019-10-15 00:02:28,807 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 00:02:28,809 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:02:28,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 00:02:28,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-15 00:02:28,827 INFO L87 Difference]: Start difference. First operand 215 states. Second operand 4 states. [2019-10-15 00:02:30,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:02:30,350 INFO L93 Difference]: Finished difference Result 733 states and 1294 transitions. [2019-10-15 00:02:30,351 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 00:02:30,352 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2019-10-15 00:02:30,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:02:30,385 INFO L225 Difference]: With dead ends: 733 [2019-10-15 00:02:30,385 INFO L226 Difference]: Without dead ends: 437 [2019-10-15 00:02:30,396 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-15 00:02:30,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 437 states. [2019-10-15 00:02:30,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 437 to 437. [2019-10-15 00:02:30,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 437 states. [2019-10-15 00:02:30,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 437 states to 437 states and 633 transitions. [2019-10-15 00:02:30,481 INFO L78 Accepts]: Start accepts. Automaton has 437 states and 633 transitions. Word has length 19 [2019-10-15 00:02:30,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:02:30,482 INFO L462 AbstractCegarLoop]: Abstraction has 437 states and 633 transitions. [2019-10-15 00:02:30,482 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 00:02:30,482 INFO L276 IsEmpty]: Start isEmpty. Operand 437 states and 633 transitions. [2019-10-15 00:02:30,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2019-10-15 00:02:30,486 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:02:30,487 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-15 00:02:30,487 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:02:30,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:02:30,488 INFO L82 PathProgramCache]: Analyzing trace with hash 1696713450, now seen corresponding path program 1 times [2019-10-15 00:02:30,488 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:02:30,488 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496243004] [2019-10-15 00:02:30,488 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:02:30,489 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:02:30,489 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:02:30,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:02:30,784 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:02:30,785 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496243004] [2019-10-15 00:02:30,785 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:02:30,786 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-15 00:02:30,786 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635741453] [2019-10-15 00:02:30,788 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-15 00:02:30,788 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:02:30,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-15 00:02:30,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-15 00:02:30,789 INFO L87 Difference]: Start difference. First operand 437 states and 633 transitions. Second operand 6 states. [2019-10-15 00:02:31,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:02:31,799 INFO L93 Difference]: Finished difference Result 1329 states and 2004 transitions. [2019-10-15 00:02:31,799 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 00:02:31,799 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 93 [2019-10-15 00:02:31,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:02:31,808 INFO L225 Difference]: With dead ends: 1329 [2019-10-15 00:02:31,809 INFO L226 Difference]: Without dead ends: 898 [2019-10-15 00:02:31,811 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 [2019-10-15 00:02:31,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 898 states. [2019-10-15 00:02:31,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 898 to 880. [2019-10-15 00:02:31,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 880 states. [2019-10-15 00:02:31,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 880 states to 880 states and 1284 transitions. [2019-10-15 00:02:31,871 INFO L78 Accepts]: Start accepts. Automaton has 880 states and 1284 transitions. Word has length 93 [2019-10-15 00:02:31,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:02:31,871 INFO L462 AbstractCegarLoop]: Abstraction has 880 states and 1284 transitions. [2019-10-15 00:02:31,872 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-15 00:02:31,872 INFO L276 IsEmpty]: Start isEmpty. Operand 880 states and 1284 transitions. [2019-10-15 00:02:31,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2019-10-15 00:02:31,875 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:02:31,875 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-15 00:02:31,876 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:02:31,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:02:31,876 INFO L82 PathProgramCache]: Analyzing trace with hash -1178531378, now seen corresponding path program 1 times [2019-10-15 00:02:31,876 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:02:31,877 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562122544] [2019-10-15 00:02:31,877 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:02:31,877 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:02:31,877 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:02:31,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:02:32,094 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:02:32,095 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562122544] [2019-10-15 00:02:32,096 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:02:32,096 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-15 00:02:32,096 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729483678] [2019-10-15 00:02:32,098 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-15 00:02:32,098 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:02:32,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-15 00:02:32,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-15 00:02:32,099 INFO L87 Difference]: Start difference. First operand 880 states and 1284 transitions. Second operand 6 states. [2019-10-15 00:02:33,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:02:33,054 INFO L93 Difference]: Finished difference Result 2219 states and 3338 transitions. [2019-10-15 00:02:33,056 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 00:02:33,057 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 95 [2019-10-15 00:02:33,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:02:33,073 INFO L225 Difference]: With dead ends: 2219 [2019-10-15 00:02:33,073 INFO L226 Difference]: Without dead ends: 1345 [2019-10-15 00:02:33,078 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-10-15 00:02:33,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1345 states. [2019-10-15 00:02:33,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1345 to 1039. [2019-10-15 00:02:33,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1039 states. [2019-10-15 00:02:33,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1039 states to 1039 states and 1451 transitions. [2019-10-15 00:02:33,196 INFO L78 Accepts]: Start accepts. Automaton has 1039 states and 1451 transitions. Word has length 95 [2019-10-15 00:02:33,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:02:33,197 INFO L462 AbstractCegarLoop]: Abstraction has 1039 states and 1451 transitions. [2019-10-15 00:02:33,197 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-15 00:02:33,198 INFO L276 IsEmpty]: Start isEmpty. Operand 1039 states and 1451 transitions. [2019-10-15 00:02:33,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2019-10-15 00:02:33,207 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:02:33,208 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-15 00:02:33,208 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:02:33,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:02:33,209 INFO L82 PathProgramCache]: Analyzing trace with hash -921580439, now seen corresponding path program 1 times [2019-10-15 00:02:33,209 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:02:33,210 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500122640] [2019-10-15 00:02:33,210 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:02:33,210 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:02:33,210 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:02:33,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:02:33,327 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:02:33,328 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500122640] [2019-10-15 00:02:33,328 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:02:33,328 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-15 00:02:33,328 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424040348] [2019-10-15 00:02:33,329 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 00:02:33,329 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:02:33,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 00:02:33,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-15 00:02:33,330 INFO L87 Difference]: Start difference. First operand 1039 states and 1451 transitions. Second operand 4 states. [2019-10-15 00:02:34,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:02:34,314 INFO L93 Difference]: Finished difference Result 2360 states and 3320 transitions. [2019-10-15 00:02:34,315 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 00:02:34,315 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 98 [2019-10-15 00:02:34,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:02:34,323 INFO L225 Difference]: With dead ends: 2360 [2019-10-15 00:02:34,323 INFO L226 Difference]: Without dead ends: 1327 [2019-10-15 00:02:34,326 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-15 00:02:34,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1327 states. [2019-10-15 00:02:34,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1327 to 1327. [2019-10-15 00:02:34,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1327 states. [2019-10-15 00:02:34,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1327 states to 1327 states and 1706 transitions. [2019-10-15 00:02:34,408 INFO L78 Accepts]: Start accepts. Automaton has 1327 states and 1706 transitions. Word has length 98 [2019-10-15 00:02:34,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:02:34,408 INFO L462 AbstractCegarLoop]: Abstraction has 1327 states and 1706 transitions. [2019-10-15 00:02:34,409 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 00:02:34,409 INFO L276 IsEmpty]: Start isEmpty. Operand 1327 states and 1706 transitions. [2019-10-15 00:02:34,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2019-10-15 00:02:34,410 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:02:34,411 INFO L380 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 00:02:34,411 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:02:34,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:02:34,412 INFO L82 PathProgramCache]: Analyzing trace with hash 1133582729, now seen corresponding path program 1 times [2019-10-15 00:02:34,412 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:02:34,412 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648637393] [2019-10-15 00:02:34,412 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:02:34,412 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:02:34,413 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:02:34,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:02:34,523 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:02:34,524 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648637393] [2019-10-15 00:02:34,524 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:02:34,524 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-15 00:02:34,525 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701799540] [2019-10-15 00:02:34,525 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-15 00:02:34,526 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:02:34,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-15 00:02:34,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-15 00:02:34,526 INFO L87 Difference]: Start difference. First operand 1327 states and 1706 transitions. Second operand 6 states. [2019-10-15 00:02:35,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:02:35,357 INFO L93 Difference]: Finished difference Result 3296 states and 4411 transitions. [2019-10-15 00:02:35,357 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 00:02:35,357 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 114 [2019-10-15 00:02:35,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:02:35,374 INFO L225 Difference]: With dead ends: 3296 [2019-10-15 00:02:35,375 INFO L226 Difference]: Without dead ends: 1975 [2019-10-15 00:02:35,380 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-10-15 00:02:35,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1975 states. [2019-10-15 00:02:35,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1975 to 1784. [2019-10-15 00:02:35,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1784 states. [2019-10-15 00:02:35,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1784 states to 1784 states and 2199 transitions. [2019-10-15 00:02:35,447 INFO L78 Accepts]: Start accepts. Automaton has 1784 states and 2199 transitions. Word has length 114 [2019-10-15 00:02:35,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:02:35,449 INFO L462 AbstractCegarLoop]: Abstraction has 1784 states and 2199 transitions. [2019-10-15 00:02:35,449 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-15 00:02:35,449 INFO L276 IsEmpty]: Start isEmpty. Operand 1784 states and 2199 transitions. [2019-10-15 00:02:35,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2019-10-15 00:02:35,456 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:02:35,456 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-15 00:02:35,457 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:02:35,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:02:35,457 INFO L82 PathProgramCache]: Analyzing trace with hash -306672650, now seen corresponding path program 1 times [2019-10-15 00:02:35,458 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:02:35,458 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038168322] [2019-10-15 00:02:35,458 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:02:35,458 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:02:35,458 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:02:35,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:02:35,752 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2019-10-15 00:02:35,752 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038168322] [2019-10-15 00:02:35,753 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1183604706] [2019-10-15 00:02:35,753 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 [2019-10-15 00:02:35,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:02:35,875 INFO L256 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-15 00:02:35,887 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 00:02:35,983 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2019-10-15 00:02:35,984 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 00:02:36,067 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2019-10-15 00:02:36,067 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-15 00:02:36,068 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [4] total 5 [2019-10-15 00:02:36,068 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869218571] [2019-10-15 00:02:36,069 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 00:02:36,069 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:02:36,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 00:02:36,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-15 00:02:36,070 INFO L87 Difference]: Start difference. First operand 1784 states and 2199 transitions. Second operand 3 states. [2019-10-15 00:02:36,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:02:36,672 INFO L93 Difference]: Finished difference Result 2793 states and 3473 transitions. [2019-10-15 00:02:36,673 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 00:02:36,673 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 187 [2019-10-15 00:02:36,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:02:36,688 INFO L225 Difference]: With dead ends: 2793 [2019-10-15 00:02:36,689 INFO L226 Difference]: Without dead ends: 2791 [2019-10-15 00:02:36,691 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 382 GetRequests, 377 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-15 00:02:36,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2791 states. [2019-10-15 00:02:36,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2791 to 2217. [2019-10-15 00:02:36,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2217 states. [2019-10-15 00:02:36,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2217 states to 2217 states and 2756 transitions. [2019-10-15 00:02:36,759 INFO L78 Accepts]: Start accepts. Automaton has 2217 states and 2756 transitions. Word has length 187 [2019-10-15 00:02:36,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:02:36,760 INFO L462 AbstractCegarLoop]: Abstraction has 2217 states and 2756 transitions. [2019-10-15 00:02:36,760 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 00:02:36,760 INFO L276 IsEmpty]: Start isEmpty. Operand 2217 states and 2756 transitions. [2019-10-15 00:02:36,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2019-10-15 00:02:36,766 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:02:36,767 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-15 00:02:36,976 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 00:02:36,977 INFO L410 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:02:36,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:02:36,977 INFO L82 PathProgramCache]: Analyzing trace with hash -1031995774, now seen corresponding path program 1 times [2019-10-15 00:02:36,977 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:02:36,978 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201609658] [2019-10-15 00:02:36,978 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:02:36,978 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:02:36,978 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:02:37,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:02:37,261 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 25 proven. 5 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2019-10-15 00:02:37,261 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201609658] [2019-10-15 00:02:37,262 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [267416286] [2019-10-15 00:02:37,262 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 [2019-10-15 00:02:37,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:02:37,381 INFO L256 TraceCheckSpWp]: Trace formula consists of 416 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-15 00:02:37,397 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 00:02:37,606 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 101 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:02:37,606 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 00:02:37,789 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 101 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:02:37,789 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [985567529] [2019-10-15 00:02:37,798 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 240 [2019-10-15 00:02:37,877 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-15 00:02:37,877 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-15 00:02:49,427 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation.