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/Problem14_label01.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 00:05:20,969 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 00:05:20,971 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 00:05:20,991 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 00:05:20,992 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 00:05:20,994 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 00:05:20,996 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 00:05:21,006 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 00:05:21,010 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 00:05:21,014 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 00:05:21,015 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 00:05:21,017 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 00:05:21,017 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 00:05:21,019 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 00:05:21,021 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 00:05:21,023 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 00:05:21,024 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 00:05:21,025 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 00:05:21,026 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 00:05:21,032 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 00:05:21,036 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 00:05:21,039 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 00:05:21,041 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 00:05:21,042 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 00:05:21,045 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 00:05:21,055 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 00:05:21,056 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 00:05:21,057 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 00:05:21,058 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 00:05:21,093 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 00:05:21,094 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 00:05:21,095 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 00:05:21,095 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 00:05:21,095 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 00:05:21,096 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 00:05:21,096 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 00:05:21,099 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 00:05:21,099 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 00:05:21,100 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 00:05:21,100 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 00:05:21,100 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 00:05:21,100 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 00:05:21,100 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 00:05:21,101 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 00:05:21,101 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 00:05:21,101 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 00:05:21,101 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 00:05:21,101 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 00:05:21,102 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 00:05:21,102 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 00:05:21,102 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 00:05:21,105 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 00:05:21,106 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 00:05:21,106 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 00:05:21,106 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 00:05:21,106 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 00:05:21,106 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 00:05:21,107 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 00:05:21,464 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 00:05:21,487 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 00:05:21,491 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 00:05:21,493 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 00:05:21,493 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 00:05:21,494 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem14_label01.c [2019-10-15 00:05:21,571 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bafe9fe33/99753a28ed924437acda40a4963ec876/FLAG3db520e8c [2019-10-15 00:05:22,135 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 00:05:22,136 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem14_label01.c [2019-10-15 00:05:22,150 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bafe9fe33/99753a28ed924437acda40a4963ec876/FLAG3db520e8c [2019-10-15 00:05:22,437 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bafe9fe33/99753a28ed924437acda40a4963ec876 [2019-10-15 00:05:22,449 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 00:05:22,450 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 00:05:22,451 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 00:05:22,452 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 00:05:22,455 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 00:05:22,456 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 12:05:22" (1/1) ... [2019-10-15 00:05:22,459 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@287e3a05 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:05:22, skipping insertion in model container [2019-10-15 00:05:22,459 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 12:05:22" (1/1) ... [2019-10-15 00:05:22,467 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 00:05:22,532 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 00:05:23,157 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 00:05:23,164 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 00:05:23,277 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 00:05:23,302 INFO L192 MainTranslator]: Completed translation [2019-10-15 00:05:23,302 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:05:23 WrapperNode [2019-10-15 00:05:23,302 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 00:05:23,303 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 00:05:23,303 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 00:05:23,304 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 00:05:23,317 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:05:23" (1/1) ... [2019-10-15 00:05:23,318 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:05:23" (1/1) ... [2019-10-15 00:05:23,340 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:05:23" (1/1) ... [2019-10-15 00:05:23,341 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:05:23" (1/1) ... [2019-10-15 00:05:23,396 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:05:23" (1/1) ... [2019-10-15 00:05:23,421 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:05:23" (1/1) ... [2019-10-15 00:05:23,439 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:05:23" (1/1) ... [2019-10-15 00:05:23,470 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 00:05:23,471 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 00:05:23,471 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 00:05:23,474 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 00:05:23,475 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:05:23" (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 00:05:23,554 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 00:05:23,555 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 00:05:23,555 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-15 00:05:23,555 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 00:05:23,556 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-15 00:05:23,556 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 00:05:23,556 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 00:05:23,556 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-15 00:05:23,556 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 00:05:23,557 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 00:05:23,557 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 00:05:24,978 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 00:05:24,979 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-15 00:05:24,980 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 12:05:24 BoogieIcfgContainer [2019-10-15 00:05:24,981 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 00:05:24,982 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 00:05:24,982 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 00:05:24,985 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 00:05:24,986 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 12:05:22" (1/3) ... [2019-10-15 00:05:24,987 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33406728 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 12:05:24, skipping insertion in model container [2019-10-15 00:05:24,987 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:05:23" (2/3) ... [2019-10-15 00:05:24,987 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33406728 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 12:05:24, skipping insertion in model container [2019-10-15 00:05:24,988 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 12:05:24" (3/3) ... [2019-10-15 00:05:24,989 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem14_label01.c [2019-10-15 00:05:24,999 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 00:05:25,008 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 00:05:25,019 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 00:05:25,047 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 00:05:25,047 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 00:05:25,047 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 00:05:25,048 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 00:05:25,048 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 00:05:25,048 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 00:05:25,048 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 00:05:25,048 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 00:05:25,075 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states. [2019-10-15 00:05:25,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2019-10-15 00:05:25,084 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:05:25,085 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] [2019-10-15 00:05:25,087 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:05:25,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:05:25,093 INFO L82 PathProgramCache]: Analyzing trace with hash -184228989, now seen corresponding path program 1 times [2019-10-15 00:05:25,103 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:05:25,103 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734209663] [2019-10-15 00:05:25,104 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:05:25,104 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:05:25,104 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:05:25,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:05:25,467 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 00:05:25,468 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734209663] [2019-10-15 00:05:25,469 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:05:25,469 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 00:05:25,470 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230469599] [2019-10-15 00:05:25,475 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 00:05:25,476 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:05:25,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 00:05:25,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 00:05:25,500 INFO L87 Difference]: Start difference. First operand 254 states. Second operand 3 states. [2019-10-15 00:05:26,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:05:26,676 INFO L93 Difference]: Finished difference Result 688 states and 1223 transitions. [2019-10-15 00:05:26,676 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 00:05:26,678 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 60 [2019-10-15 00:05:26,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:05:26,698 INFO L225 Difference]: With dead ends: 688 [2019-10-15 00:05:26,698 INFO L226 Difference]: Without dead ends: 372 [2019-10-15 00:05:26,707 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 00:05:26,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 372 states. [2019-10-15 00:05:26,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 372 to 372. [2019-10-15 00:05:26,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 372 states. [2019-10-15 00:05:26,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 372 states to 372 states and 596 transitions. [2019-10-15 00:05:26,789 INFO L78 Accepts]: Start accepts. Automaton has 372 states and 596 transitions. Word has length 60 [2019-10-15 00:05:26,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:05:26,790 INFO L462 AbstractCegarLoop]: Abstraction has 372 states and 596 transitions. [2019-10-15 00:05:26,790 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 00:05:26,790 INFO L276 IsEmpty]: Start isEmpty. Operand 372 states and 596 transitions. [2019-10-15 00:05:26,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2019-10-15 00:05:26,797 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:05:26,797 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-15 00:05:26,798 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:05:26,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:05:26,798 INFO L82 PathProgramCache]: Analyzing trace with hash 264991034, now seen corresponding path program 1 times [2019-10-15 00:05:26,798 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:05:26,799 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117403460] [2019-10-15 00:05:26,799 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:05:26,799 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:05:26,799 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:05:26,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:05:27,066 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 53 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:05:27,067 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117403460] [2019-10-15 00:05:27,067 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:05:27,067 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-15 00:05:27,067 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742664995] [2019-10-15 00:05:27,069 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-15 00:05:27,070 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:05:27,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-15 00:05:27,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-15 00:05:27,070 INFO L87 Difference]: Start difference. First operand 372 states and 596 transitions. Second operand 5 states. [2019-10-15 00:05:28,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:05:28,472 INFO L93 Difference]: Finished difference Result 940 states and 1514 transitions. [2019-10-15 00:05:28,472 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-15 00:05:28,473 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 136 [2019-10-15 00:05:28,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:05:28,478 INFO L225 Difference]: With dead ends: 940 [2019-10-15 00:05:28,478 INFO L226 Difference]: Without dead ends: 574 [2019-10-15 00:05:28,480 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-10-15 00:05:28,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 574 states. [2019-10-15 00:05:28,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 574 to 564. [2019-10-15 00:05:28,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 564 states. [2019-10-15 00:05:28,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 564 states to 564 states and 831 transitions. [2019-10-15 00:05:28,533 INFO L78 Accepts]: Start accepts. Automaton has 564 states and 831 transitions. Word has length 136 [2019-10-15 00:05:28,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:05:28,534 INFO L462 AbstractCegarLoop]: Abstraction has 564 states and 831 transitions. [2019-10-15 00:05:28,534 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-15 00:05:28,534 INFO L276 IsEmpty]: Start isEmpty. Operand 564 states and 831 transitions. [2019-10-15 00:05:28,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2019-10-15 00:05:28,540 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:05:28,540 INFO L380 BasicCegarLoop]: trace histogram [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, 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 00:05:28,540 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:05:28,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:05:28,541 INFO L82 PathProgramCache]: Analyzing trace with hash -1698067270, now seen corresponding path program 1 times [2019-10-15 00:05:28,541 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:05:28,541 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869603308] [2019-10-15 00:05:28,541 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:05:28,542 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:05:28,542 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:05:28,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:05:28,776 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 53 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:05:28,776 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869603308] [2019-10-15 00:05:28,777 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:05:28,777 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-15 00:05:28,777 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16542686] [2019-10-15 00:05:28,778 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-15 00:05:28,778 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:05:28,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-15 00:05:28,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-15 00:05:28,779 INFO L87 Difference]: Start difference. First operand 564 states and 831 transitions. Second operand 6 states. [2019-10-15 00:05:30,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:05:30,146 INFO L93 Difference]: Finished difference Result 1526 states and 2378 transitions. [2019-10-15 00:05:30,148 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 00:05:30,149 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 200 [2019-10-15 00:05:30,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:05:30,157 INFO L225 Difference]: With dead ends: 1526 [2019-10-15 00:05:30,157 INFO L226 Difference]: Without dead ends: 968 [2019-10-15 00:05:30,160 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 00:05:30,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 968 states. [2019-10-15 00:05:30,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 968 to 942. [2019-10-15 00:05:30,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 942 states. [2019-10-15 00:05:30,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 942 states to 942 states and 1352 transitions. [2019-10-15 00:05:30,237 INFO L78 Accepts]: Start accepts. Automaton has 942 states and 1352 transitions. Word has length 200 [2019-10-15 00:05:30,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:05:30,238 INFO L462 AbstractCegarLoop]: Abstraction has 942 states and 1352 transitions. [2019-10-15 00:05:30,238 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-15 00:05:30,238 INFO L276 IsEmpty]: Start isEmpty. Operand 942 states and 1352 transitions. [2019-10-15 00:05:30,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2019-10-15 00:05:30,244 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:05:30,245 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 00:05:30,245 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:05:30,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:05:30,245 INFO L82 PathProgramCache]: Analyzing trace with hash 328652488, now seen corresponding path program 1 times [2019-10-15 00:05:30,246 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:05:30,246 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834617378] [2019-10-15 00:05:30,246 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:05:30,246 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:05:30,246 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:05:30,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:05:30,470 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 180 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:05:30,470 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834617378] [2019-10-15 00:05:30,471 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1544827385] [2019-10-15 00:05:30,471 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 00:05:30,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:05:30,565 INFO L256 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-15 00:05:30,577 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 00:05:30,695 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 180 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:05:30,695 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 00:05:30,855 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 180 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:05:30,856 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [1455489878] [2019-10-15 00:05:30,867 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 220 [2019-10-15 00:05:30,940 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-15 00:05:30,940 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-15 00:05:35,216 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-10-15 00:05:35,218 INFO L272 AbstractInterpreter]: Visited 88 different actions 88 times. Never merged. Never widened. Performed 215 root evaluator evaluations with a maximum evaluation depth of 13. Performed 215 inverse root evaluator evaluations with a maximum inverse evaluation depth of 13. Never found a fixpoint. Largest state had 24 variables. [2019-10-15 00:05:35,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:05:35,222 INFO L536 sIntCurrentIteration]: Generating AbsInt predicates [2019-10-15 00:05:38,742 INFO L227 lantSequenceWeakener]: Weakened 200 states. On average, predicates are now at 78.37% of their original sizes. [2019-10-15 00:05:38,742 INFO L551 sIntCurrentIteration]: Unifying AI predicates [2019-10-15 00:05:38,835 INFO L553 sIntCurrentIteration]: We unified 218 AI predicates to 218 [2019-10-15 00:05:38,835 INFO L562 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-10-15 00:05:38,836 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2019-10-15 00:05:38,837 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [6, 5, 5] total 18 [2019-10-15 00:05:38,837 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814869483] [2019-10-15 00:05:38,838 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-15 00:05:38,839 INFO L137 tionRefinementEngine]: Using predicate unifier AbsIntPredicateUnifier provided by strategy TAIPAN [2019-10-15 00:05:38,839 INFO L124 tionRefinementEngine]: Using hoare triple checker CachingHoareTripleCheckerMap provided by strategy [2019-10-15 00:05:38,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-15 00:05:38,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2019-10-15 00:05:38,839 INFO L87 Difference]: Start difference. First operand 942 states and 1352 transitions. Second operand 10 states.