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-f4eb214f-m [2019-10-13 20:03:33,728 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 20:03:33,730 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 20:03:33,743 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 20:03:33,743 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 20:03:33,744 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 20:03:33,746 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 20:03:33,748 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 20:03:33,750 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 20:03:33,751 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 20:03:33,752 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 20:03:33,754 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 20:03:33,754 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 20:03:33,755 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 20:03:33,756 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 20:03:33,758 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 20:03:33,761 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 20:03:33,762 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 20:03:33,768 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 20:03:33,773 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 20:03:33,777 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 20:03:33,779 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 20:03:33,783 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 20:03:33,784 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 20:03:33,787 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-13 20:03:33,797 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 20:03:33,798 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 20:03:33,799 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 20:03:33,799 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 [2019-10-13 20:03:33,815 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 20:03:33,816 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 20:03:33,817 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 20:03:33,817 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 20:03:33,818 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 20:03:33,818 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 20:03:33,818 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 20:03:33,818 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 20:03:33,819 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 20:03:33,819 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 20:03:33,819 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 20:03:33,819 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 20:03:33,819 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 20:03:33,820 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 20:03:33,820 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 20:03:33,820 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 20:03:33,820 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 20:03:33,820 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 20:03:33,821 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 20:03:33,821 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 20:03:33,821 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 20:03:33,821 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 20:03:33,821 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 20:03:33,822 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 20:03:33,822 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 20:03:33,822 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 20:03:33,822 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 20:03:33,823 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 20:03:33,823 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 [2019-10-13 20:03:34,102 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 20:03:34,115 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 20:03:34,118 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 20:03:34,120 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 20:03:34,120 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 20:03:34,121 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem11_label04.c [2019-10-13 20:03:34,184 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8d4d09754/b392277ceda0465083ad9e0b7767fffe/FLAGa8db638d3 [2019-10-13 20:03:34,763 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 20:03:34,764 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem11_label04.c [2019-10-13 20:03:34,784 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8d4d09754/b392277ceda0465083ad9e0b7767fffe/FLAGa8db638d3 [2019-10-13 20:03:34,957 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8d4d09754/b392277ceda0465083ad9e0b7767fffe [2019-10-13 20:03:34,968 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 20:03:34,970 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 20:03:34,971 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 20:03:34,971 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 20:03:34,975 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 20:03:34,976 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 08:03:34" (1/1) ... [2019-10-13 20:03:34,979 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3304fef9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:03:34, skipping insertion in model container [2019-10-13 20:03:34,979 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 08:03:34" (1/1) ... [2019-10-13 20:03:34,987 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 20:03:35,049 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 20:03:35,845 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 20:03:35,852 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 20:03:36,120 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 20:03:36,148 INFO L192 MainTranslator]: Completed translation [2019-10-13 20:03:36,149 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:03:36 WrapperNode [2019-10-13 20:03:36,149 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 20:03:36,150 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 20:03:36,151 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 20:03:36,151 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 20:03:36,170 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:03:36" (1/1) ... [2019-10-13 20:03:36,171 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:03:36" (1/1) ... [2019-10-13 20:03:36,216 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:03:36" (1/1) ... [2019-10-13 20:03:36,217 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:03:36" (1/1) ... [2019-10-13 20:03:36,290 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:03:36" (1/1) ... [2019-10-13 20:03:36,304 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:03:36" (1/1) ... [2019-10-13 20:03:36,317 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:03:36" (1/1) ... [2019-10-13 20:03:36,334 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 20:03:36,335 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 20:03:36,335 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 20:03:36,335 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 20:03:36,341 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:03:36" (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 [2019-10-13 20:03:36,416 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 20:03:36,416 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 20:03:36,416 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-13 20:03:36,417 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 20:03:36,417 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-13 20:03:36,417 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 20:03:36,417 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 20:03:36,417 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-13 20:03:36,418 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 20:03:36,418 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 20:03:36,418 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 20:03:38,314 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 20:03:38,314 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-13 20:03:38,316 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:03:38 BoogieIcfgContainer [2019-10-13 20:03:38,316 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 20:03:38,318 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 20:03:38,318 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 20:03:38,322 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 20:03:38,322 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 08:03:34" (1/3) ... [2019-10-13 20:03:38,323 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68fc52d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 08:03:38, skipping insertion in model container [2019-10-13 20:03:38,324 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:03:36" (2/3) ... [2019-10-13 20:03:38,324 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68fc52d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 08:03:38, skipping insertion in model container [2019-10-13 20:03:38,324 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:03:38" (3/3) ... [2019-10-13 20:03:38,327 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem11_label04.c [2019-10-13 20:03:38,338 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 20:03:38,347 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 20:03:38,360 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 20:03:38,394 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 20:03:38,394 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 20:03:38,394 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 20:03:38,394 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 20:03:38,395 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 20:03:38,395 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 20:03:38,395 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 20:03:38,395 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 20:03:38,426 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states. [2019-10-13 20:03:38,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2019-10-13 20:03:38,441 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:03:38,443 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] [2019-10-13 20:03:38,445 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:03:38,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:03:38,452 INFO L82 PathProgramCache]: Analyzing trace with hash 1796892554, now seen corresponding path program 1 times [2019-10-13 20:03:38,462 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:03:38,463 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618211868] [2019-10-13 20:03:38,463 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:03:38,463 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:03:38,464 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:03:38,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:03:39,048 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:03:39,049 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618211868] [2019-10-13 20:03:39,050 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:03:39,050 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 20:03:39,050 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039223524] [2019-10-13 20:03:39,055 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 20:03:39,057 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:03:39,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 20:03:39,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-13 20:03:39,075 INFO L87 Difference]: Start difference. First operand 292 states. Second operand 4 states. [2019-10-13 20:03:41,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:03:41,199 INFO L93 Difference]: Finished difference Result 981 states and 1757 transitions. [2019-10-13 20:03:41,199 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 20:03:41,201 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 59 [2019-10-13 20:03:41,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:03:41,223 INFO L225 Difference]: With dead ends: 981 [2019-10-13 20:03:41,223 INFO L226 Difference]: Without dead ends: 622 [2019-10-13 20:03:41,237 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 [2019-10-13 20:03:41,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 622 states. [2019-10-13 20:03:41,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 622 to 622. [2019-10-13 20:03:41,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 622 states. [2019-10-13 20:03:41,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 622 states to 622 states and 880 transitions. [2019-10-13 20:03:41,346 INFO L78 Accepts]: Start accepts. Automaton has 622 states and 880 transitions. Word has length 59 [2019-10-13 20:03:41,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:03:41,347 INFO L462 AbstractCegarLoop]: Abstraction has 622 states and 880 transitions. [2019-10-13 20:03:41,347 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 20:03:41,348 INFO L276 IsEmpty]: Start isEmpty. Operand 622 states and 880 transitions. [2019-10-13 20:03:41,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2019-10-13 20:03:41,356 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:03:41,356 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] [2019-10-13 20:03:41,357 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:03:41,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:03:41,357 INFO L82 PathProgramCache]: Analyzing trace with hash -676009126, now seen corresponding path program 1 times [2019-10-13 20:03:41,358 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:03:41,358 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478297272] [2019-10-13 20:03:41,358 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:03:41,358 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:03:41,358 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:03:41,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:03:41,545 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:03:41,546 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478297272] [2019-10-13 20:03:41,546 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:03:41,547 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-13 20:03:41,547 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196384787] [2019-10-13 20:03:41,554 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 20:03:41,554 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:03:41,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 20:03:41,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-10-13 20:03:41,555 INFO L87 Difference]: Start difference. First operand 622 states and 880 transitions. Second operand 6 states. [2019-10-13 20:03:43,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:03:43,561 INFO L93 Difference]: Finished difference Result 1837 states and 2643 transitions. [2019-10-13 20:03:43,562 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 20:03:43,562 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 139 [2019-10-13 20:03:43,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:03:43,571 INFO L225 Difference]: With dead ends: 1837 [2019-10-13 20:03:43,572 INFO L226 Difference]: Without dead ends: 1221 [2019-10-13 20:03:43,575 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 [2019-10-13 20:03:43,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1221 states. [2019-10-13 20:03:43,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1221 to 1210. [2019-10-13 20:03:43,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1210 states. [2019-10-13 20:03:43,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1210 states to 1210 states and 1600 transitions. [2019-10-13 20:03:43,637 INFO L78 Accepts]: Start accepts. Automaton has 1210 states and 1600 transitions. Word has length 139 [2019-10-13 20:03:43,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:03:43,637 INFO L462 AbstractCegarLoop]: Abstraction has 1210 states and 1600 transitions. [2019-10-13 20:03:43,638 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-13 20:03:43,638 INFO L276 IsEmpty]: Start isEmpty. Operand 1210 states and 1600 transitions. [2019-10-13 20:03:43,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2019-10-13 20:03:43,644 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:03:43,645 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] [2019-10-13 20:03:43,645 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:03:43,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:03:43,645 INFO L82 PathProgramCache]: Analyzing trace with hash 828635490, now seen corresponding path program 1 times [2019-10-13 20:03:43,646 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:03:43,646 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802260261] [2019-10-13 20:03:43,646 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:03:43,646 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:03:43,647 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:03:43,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:03:44,001 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 47 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:03:44,001 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802260261] [2019-10-13 20:03:44,001 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [748918427] [2019-10-13 20:03:44,002 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 [2019-10-13 20:03:44,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:03:44,118 INFO L256 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 20:03:44,149 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 20:03:44,251 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:03:44,251 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 20:03:44,366 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:03:44,367 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 20:03:44,367 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [8] total 10 [2019-10-13 20:03:44,367 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367888839] [2019-10-13 20:03:44,368 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 20:03:44,369 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:03:44,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 20:03:44,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2019-10-13 20:03:44,369 INFO L87 Difference]: Start difference. First operand 1210 states and 1600 transitions. Second operand 4 states. [2019-10-13 20:03:46,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:03:46,194 INFO L93 Difference]: Finished difference Result 4530 states and 6248 transitions. [2019-10-13 20:03:46,195 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 20:03:46,195 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 190 [2019-10-13 20:03:46,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:03:46,218 INFO L225 Difference]: With dead ends: 4530 [2019-10-13 20:03:46,218 INFO L226 Difference]: Without dead ends: 3326 [2019-10-13 20:03:46,223 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 389 GetRequests, 381 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2019-10-13 20:03:46,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3326 states. [2019-10-13 20:03:46,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3326 to 2739. [2019-10-13 20:03:46,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2739 states. [2019-10-13 20:03:46,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2739 states to 2739 states and 3736 transitions. [2019-10-13 20:03:46,354 INFO L78 Accepts]: Start accepts. Automaton has 2739 states and 3736 transitions. Word has length 190 [2019-10-13 20:03:46,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:03:46,356 INFO L462 AbstractCegarLoop]: Abstraction has 2739 states and 3736 transitions. [2019-10-13 20:03:46,356 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 20:03:46,357 INFO L276 IsEmpty]: Start isEmpty. Operand 2739 states and 3736 transitions. [2019-10-13 20:03:46,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 272 [2019-10-13 20:03:46,374 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:03:46,374 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] [2019-10-13 20:03:46,581 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 20:03:46,582 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:03:46,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:03:46,582 INFO L82 PathProgramCache]: Analyzing trace with hash -1068121551, now seen corresponding path program 1 times [2019-10-13 20:03:46,583 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:03:46,583 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103068725] [2019-10-13 20:03:46,583 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:03:46,583 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:03:46,584 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:03:46,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:03:47,020 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 7 proven. 103 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2019-10-13 20:03:47,021 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103068725] [2019-10-13 20:03:47,021 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1928274340] [2019-10-13 20:03:47,021 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 [2019-10-13 20:03:47,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:03:47,120 INFO L256 TraceCheckSpWp]: Trace formula consists of 480 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-13 20:03:47,126 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 20:03:47,229 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 183 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:03:47,229 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 20:03:47,333 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 20:03:47,334 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-10-13 20:03:47,338 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-10-13 20:03:47,604 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 183 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:03:47,605 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [467103747] [2019-10-13 20:03:47,613 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 272 [2019-10-13 20:03:47,689 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-13 20:03:47,690 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2)