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/Problem11_label04.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 00:02:30,333 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 00:02:30,336 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 00:02:30,355 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 00:02:30,355 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 00:02:30,358 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 00:02:30,360 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 00:02:30,372 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 00:02:30,374 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 00:02:30,377 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 00:02:30,378 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 00:02:30,379 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 00:02:30,379 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 00:02:30,383 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 00:02:30,386 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 00:02:30,387 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 00:02:30,389 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 00:02:30,390 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 00:02:30,392 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 00:02:30,394 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 00:02:30,395 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 00:02:30,396 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 00:02:30,397 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 00:02:30,398 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 00:02:30,400 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 00:02:30,412 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 00:02:30,413 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 00:02:30,415 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 00:02:30,416 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 00:02:30,436 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 00:02:30,437 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 00:02:30,438 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 00:02:30,438 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 00:02:30,438 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 00:02:30,438 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 00:02:30,439 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 00:02:30,439 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 00:02:30,439 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 00:02:30,439 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 00:02:30,439 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 00:02:30,440 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 00:02:30,440 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 00:02:30,440 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 00:02:30,440 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 00:02:30,440 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 00:02:30,441 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 00:02:30,441 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 00:02:30,441 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 00:02:30,441 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 00:02:30,442 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 00:02:30,442 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 00:02:30,442 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 00:02:30,442 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 00:02:30,442 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 00:02:30,443 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 00:02:30,443 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 00:02:30,443 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 00:02:30,443 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 00:02:30,722 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 00:02:30,735 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 00:02:30,739 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 00:02:30,740 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 00:02:30,741 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 00:02:30,742 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem11_label04.c [2019-10-15 00:02:30,815 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f559eedfb/b20d9c22dfb9484abe2b5f67fc7effc8/FLAG3d72b8e9a [2019-10-15 00:02:31,457 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 00:02:31,458 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem11_label04.c [2019-10-15 00:02:31,474 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f559eedfb/b20d9c22dfb9484abe2b5f67fc7effc8/FLAG3d72b8e9a [2019-10-15 00:02:31,680 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f559eedfb/b20d9c22dfb9484abe2b5f67fc7effc8 [2019-10-15 00:02:31,691 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 00:02:31,693 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 00:02:31,694 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 00:02:31,694 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 00:02:31,697 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 00:02:31,698 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 12:02:31" (1/1) ... [2019-10-15 00:02:31,701 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7730a066 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:02:31, skipping insertion in model container [2019-10-15 00:02:31,702 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 12:02:31" (1/1) ... [2019-10-15 00:02:31,710 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 00:02:31,781 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 00:02:32,442 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 00:02:32,448 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 00:02:32,617 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 00:02:32,637 INFO L192 MainTranslator]: Completed translation [2019-10-15 00:02:32,638 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:02:32 WrapperNode [2019-10-15 00:02:32,639 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 00:02:32,640 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 00:02:32,640 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 00:02:32,641 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 00:02:32,656 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:02:32" (1/1) ... [2019-10-15 00:02:32,657 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:02:32" (1/1) ... [2019-10-15 00:02:32,685 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:02:32" (1/1) ... [2019-10-15 00:02:32,686 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:02:32" (1/1) ... [2019-10-15 00:02:32,755 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:02:32" (1/1) ... [2019-10-15 00:02:32,786 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:02:32" (1/1) ... [2019-10-15 00:02:32,815 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:02:32" (1/1) ... [2019-10-15 00:02:32,832 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 00:02:32,833 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 00:02:32,833 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 00:02:32,834 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 00:02:32,835 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:02:32" (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 00:02:32,916 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 00:02:32,917 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 00:02:32,917 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-15 00:02:32,917 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 00:02:32,918 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-15 00:02:32,918 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 00:02:32,918 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 00:02:32,919 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-15 00:02:32,919 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 00:02:32,920 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 00:02:32,923 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 00:02:34,841 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 00:02:34,843 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-15 00:02:34,845 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 12:02:34 BoogieIcfgContainer [2019-10-15 00:02:34,845 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 00:02:34,847 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 00:02:34,848 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 00:02:34,852 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 00:02:34,852 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 12:02:31" (1/3) ... [2019-10-15 00:02:34,853 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57af784e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 12:02:34, skipping insertion in model container [2019-10-15 00:02:34,854 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:02:32" (2/3) ... [2019-10-15 00:02:34,856 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57af784e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 12:02:34, skipping insertion in model container [2019-10-15 00:02:34,856 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 12:02:34" (3/3) ... [2019-10-15 00:02:34,871 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem11_label04.c [2019-10-15 00:02:34,883 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 00:02:34,925 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 00:02:34,939 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 00:02:34,980 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 00:02:34,980 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 00:02:34,980 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 00:02:34,980 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 00:02:34,980 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 00:02:34,981 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 00:02:34,981 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 00:02:34,981 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 00:02:35,021 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states. [2019-10-15 00:02:35,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2019-10-15 00:02:35,032 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:02:35,034 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] [2019-10-15 00:02:35,036 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:02:35,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:02:35,044 INFO L82 PathProgramCache]: Analyzing trace with hash 1796892554, now seen corresponding path program 1 times [2019-10-15 00:02:35,056 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:02:35,057 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018049762] [2019-10-15 00:02:35,057 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:02:35,057 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:02:35,057 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:02:35,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:02:35,446 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 00:02:35,447 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018049762] [2019-10-15 00:02:35,448 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:02:35,448 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-15 00:02:35,449 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818547664] [2019-10-15 00:02:35,454 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 00:02:35,455 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:02:35,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 00:02:35,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-15 00:02:35,477 INFO L87 Difference]: Start difference. First operand 292 states. Second operand 4 states. [2019-10-15 00:02:37,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:02:37,608 INFO L93 Difference]: Finished difference Result 981 states and 1757 transitions. [2019-10-15 00:02:37,609 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 00:02:37,611 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 59 [2019-10-15 00:02:37,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:02:37,633 INFO L225 Difference]: With dead ends: 981 [2019-10-15 00:02:37,634 INFO L226 Difference]: Without dead ends: 622 [2019-10-15 00:02:37,649 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 00:02:37,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 622 states. [2019-10-15 00:02:37,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 622 to 622. [2019-10-15 00:02:37,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 622 states. [2019-10-15 00:02:37,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 622 states to 622 states and 880 transitions. [2019-10-15 00:02:37,759 INFO L78 Accepts]: Start accepts. Automaton has 622 states and 880 transitions. Word has length 59 [2019-10-15 00:02:37,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:02:37,760 INFO L462 AbstractCegarLoop]: Abstraction has 622 states and 880 transitions. [2019-10-15 00:02:37,760 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 00:02:37,760 INFO L276 IsEmpty]: Start isEmpty. Operand 622 states and 880 transitions. [2019-10-15 00:02:37,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2019-10-15 00:02:37,767 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:02:37,768 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:02:37,768 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:02:37,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:02:37,769 INFO L82 PathProgramCache]: Analyzing trace with hash -676009126, now seen corresponding path program 1 times [2019-10-15 00:02:37,769 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:02:37,770 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739702240] [2019-10-15 00:02:37,770 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:02:37,770 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:02:37,770 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:02:37,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:02:38,008 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:02:38,009 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739702240] [2019-10-15 00:02:38,009 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:02:38,009 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-15 00:02:38,010 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499487684] [2019-10-15 00:02:38,015 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-15 00:02:38,015 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:02:38,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-15 00:02:38,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-10-15 00:02:38,016 INFO L87 Difference]: Start difference. First operand 622 states and 880 transitions. Second operand 6 states. [2019-10-15 00:02:39,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:02:39,962 INFO L93 Difference]: Finished difference Result 1837 states and 2643 transitions. [2019-10-15 00:02:39,963 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 00:02:39,963 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 139 [2019-10-15 00:02:39,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:02:39,972 INFO L225 Difference]: With dead ends: 1837 [2019-10-15 00:02:39,972 INFO L226 Difference]: Without dead ends: 1221 [2019-10-15 00:02:39,975 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-10-15 00:02:39,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1221 states. [2019-10-15 00:02:40,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1221 to 1210. [2019-10-15 00:02:40,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1210 states. [2019-10-15 00:02:40,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1210 states to 1210 states and 1600 transitions. [2019-10-15 00:02:40,032 INFO L78 Accepts]: Start accepts. Automaton has 1210 states and 1600 transitions. Word has length 139 [2019-10-15 00:02:40,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:02:40,033 INFO L462 AbstractCegarLoop]: Abstraction has 1210 states and 1600 transitions. [2019-10-15 00:02:40,033 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-15 00:02:40,033 INFO L276 IsEmpty]: Start isEmpty. Operand 1210 states and 1600 transitions. [2019-10-15 00:02:40,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2019-10-15 00:02:40,039 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:02:40,039 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:02:40,040 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:02:40,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:02:40,040 INFO L82 PathProgramCache]: Analyzing trace with hash 828635490, now seen corresponding path program 1 times [2019-10-15 00:02:40,041 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:02:40,041 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527209190] [2019-10-15 00:02:40,041 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:02:40,041 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:02:40,041 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:02:40,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:02:40,408 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 47 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:02:40,408 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527209190] [2019-10-15 00:02:40,409 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1636445125] [2019-10-15 00:02:40,409 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 00:02:40,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:02:40,521 INFO L256 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-15 00:02:40,540 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 00:02:40,648 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:02:40,652 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 00:02:40,741 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:02:40,742 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-15 00:02:40,742 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [8] total 10 [2019-10-15 00:02:40,744 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854146681] [2019-10-15 00:02:40,749 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 00:02:40,751 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:02:40,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 00:02:40,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2019-10-15 00:02:40,756 INFO L87 Difference]: Start difference. First operand 1210 states and 1600 transitions. Second operand 4 states. [2019-10-15 00:02:42,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:02:42,661 INFO L93 Difference]: Finished difference Result 4530 states and 6248 transitions. [2019-10-15 00:02:42,661 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 00:02:42,661 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 190 [2019-10-15 00:02:42,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:02:42,684 INFO L225 Difference]: With dead ends: 4530 [2019-10-15 00:02:42,684 INFO L226 Difference]: Without dead ends: 3326 [2019-10-15 00:02:42,689 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 389 GetRequests, 381 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2019-10-15 00:02:42,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3326 states. [2019-10-15 00:02:42,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3326 to 2739. [2019-10-15 00:02:42,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2739 states. [2019-10-15 00:02:42,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2739 states to 2739 states and 3736 transitions. [2019-10-15 00:02:42,813 INFO L78 Accepts]: Start accepts. Automaton has 2739 states and 3736 transitions. Word has length 190 [2019-10-15 00:02:42,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:02:42,814 INFO L462 AbstractCegarLoop]: Abstraction has 2739 states and 3736 transitions. [2019-10-15 00:02:42,814 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 00:02:42,814 INFO L276 IsEmpty]: Start isEmpty. Operand 2739 states and 3736 transitions. [2019-10-15 00:02:42,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 272 [2019-10-15 00:02:42,825 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:02:42,825 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, 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] [2019-10-15 00:02:43,032 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 00:02:43,033 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:02:43,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:02:43,033 INFO L82 PathProgramCache]: Analyzing trace with hash -1068121551, now seen corresponding path program 1 times [2019-10-15 00:02:43,033 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:02:43,034 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300780393] [2019-10-15 00:02:43,034 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:02:43,034 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:02:43,034 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:02:43,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:02:43,372 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 7 proven. 103 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2019-10-15 00:02:43,373 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300780393] [2019-10-15 00:02:43,373 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1846011155] [2019-10-15 00:02:43,374 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 00:02:43,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:02:43,501 INFO L256 TraceCheckSpWp]: Trace formula consists of 480 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-15 00:02:43,510 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 00:02:43,666 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 183 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:02:43,667 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 00:02:43,778 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 00:02:43,780 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-10-15 00:02:43,785 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-10-15 00:02:44,031 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 183 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:02:44,032 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [301217808] [2019-10-15 00:02:44,037 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 272 [2019-10-15 00:02:44,088 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-15 00:02:44,088 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2)