java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --abstractinterpretationv2.abstract.domain IntervalDomain --traceabstraction.trace.refinement.strategy TAIPAN --traceabstraction.abstract.interpretation.mode USE_PREDICATES -i ../../../trunk/examples/svcomp/eca-rers2012/Problem10_label12.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 00:00:50,927 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 00:00:50,930 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 00:00:50,948 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 00:00:50,949 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 00:00:50,951 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 00:00:50,953 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 00:00:50,963 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 00:00:50,967 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 00:00:50,972 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 00:00:50,973 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 00:00:50,975 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 00:00:50,976 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 00:00:50,978 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 00:00:50,980 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 00:00:50,981 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 00:00:50,983 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 00:00:50,983 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 00:00:50,985 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 00:00:50,990 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 00:00:50,994 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 00:00:50,997 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 00:00:51,000 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 00:00:51,000 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 00:00:51,002 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 00:00:51,009 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 00:00:51,010 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 00:00:51,010 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 00:00:51,011 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 00:00:51,025 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 00:00:51,025 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 00:00:51,026 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 00:00:51,027 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 00:00:51,027 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 00:00:51,027 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 00:00:51,027 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 00:00:51,028 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 00:00:51,028 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 00:00:51,028 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 00:00:51,028 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 00:00:51,028 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 00:00:51,029 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 00:00:51,029 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 00:00:51,029 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 00:00:51,029 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 00:00:51,029 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 00:00:51,030 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 00:00:51,030 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 00:00:51,030 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 00:00:51,030 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 00:00:51,030 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 00:00:51,031 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 00:00:51,031 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 00:00:51,031 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 00:00:51,031 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 00:00:51,032 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 00:00:51,032 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 00:00:51,032 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 00:00:51,361 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 00:00:51,374 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 00:00:51,378 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 00:00:51,379 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 00:00:51,380 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 00:00:51,381 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem10_label12.c [2019-10-15 00:00:51,444 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a2fdd5aae/d66860503cfe4d4e93f2e63c2c72cb5b/FLAG247375587 [2019-10-15 00:00:52,031 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 00:00:52,032 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem10_label12.c [2019-10-15 00:00:52,044 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a2fdd5aae/d66860503cfe4d4e93f2e63c2c72cb5b/FLAG247375587 [2019-10-15 00:00:52,259 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a2fdd5aae/d66860503cfe4d4e93f2e63c2c72cb5b [2019-10-15 00:00:52,268 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 00:00:52,269 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 00:00:52,270 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 00:00:52,271 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 00:00:52,274 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 00:00:52,275 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 12:00:52" (1/1) ... [2019-10-15 00:00:52,278 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@65373705 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:00:52, skipping insertion in model container [2019-10-15 00:00:52,279 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 12:00:52" (1/1) ... [2019-10-15 00:00:52,290 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 00:00:52,356 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 00:00:52,786 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 00:00:52,798 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 00:00:53,001 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 00:00:53,017 INFO L192 MainTranslator]: Completed translation [2019-10-15 00:00:53,018 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:00:53 WrapperNode [2019-10-15 00:00:53,018 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 00:00:53,019 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 00:00:53,019 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 00:00:53,019 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 00:00:53,032 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:00:53" (1/1) ... [2019-10-15 00:00:53,032 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:00:53" (1/1) ... [2019-10-15 00:00:53,054 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:00:53" (1/1) ... [2019-10-15 00:00:53,055 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:00:53" (1/1) ... [2019-10-15 00:00:53,105 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:00:53" (1/1) ... [2019-10-15 00:00:53,117 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:00:53" (1/1) ... [2019-10-15 00:00:53,122 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:00:53" (1/1) ... [2019-10-15 00:00:53,132 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 00:00:53,132 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 00:00:53,133 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 00:00:53,133 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 00:00:53,134 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:00:53" (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 00:00:53,190 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 00:00:53,191 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 00:00:53,191 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-15 00:00:53,191 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 00:00:53,191 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-15 00:00:53,191 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 00:00:53,192 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 00:00:53,192 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-15 00:00:53,192 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 00:00:53,192 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 00:00:53,192 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 00:00:54,451 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 00:00:54,451 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-15 00:00:54,453 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 12:00:54 BoogieIcfgContainer [2019-10-15 00:00:54,453 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 00:00:54,454 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 00:00:54,455 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 00:00:54,458 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 00:00:54,459 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 12:00:52" (1/3) ... [2019-10-15 00:00:54,459 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70a4556a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 12:00:54, skipping insertion in model container [2019-10-15 00:00:54,460 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:00:53" (2/3) ... [2019-10-15 00:00:54,460 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70a4556a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 12:00:54, skipping insertion in model container [2019-10-15 00:00:54,460 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 12:00:54" (3/3) ... [2019-10-15 00:00:54,462 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem10_label12.c [2019-10-15 00:00:54,475 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 00:00:54,485 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 00:00:54,500 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 00:00:54,533 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 00:00:54,534 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 00:00:54,534 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 00:00:54,534 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 00:00:54,535 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 00:00:54,535 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 00:00:54,535 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 00:00:54,535 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 00:00:54,562 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states. [2019-10-15 00:00:54,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-10-15 00:00:54,571 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:00:54,572 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 00:00:54,574 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:00:54,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:00:54,582 INFO L82 PathProgramCache]: Analyzing trace with hash 242271255, now seen corresponding path program 1 times [2019-10-15 00:00:54,592 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:00:54,592 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8730405] [2019-10-15 00:00:54,593 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:00:54,593 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:00:54,593 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:00:54,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:00:54,817 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 00:00:54,818 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8730405] [2019-10-15 00:00:54,818 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:00:54,819 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 00:00:54,819 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721037167] [2019-10-15 00:00:54,824 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 00:00:54,826 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:00:54,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 00:00:54,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 00:00:54,844 INFO L87 Difference]: Start difference. First operand 215 states. Second operand 3 states. [2019-10-15 00:00:55,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:00:55,947 INFO L93 Difference]: Finished difference Result 571 states and 989 transitions. [2019-10-15 00:00:55,948 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 00:00:55,950 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2019-10-15 00:00:55,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:00:55,985 INFO L225 Difference]: With dead ends: 571 [2019-10-15 00:00:55,985 INFO L226 Difference]: Without dead ends: 294 [2019-10-15 00:00:56,000 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 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 00:00:56,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2019-10-15 00:00:56,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 294. [2019-10-15 00:00:56,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 294 states. [2019-10-15 00:00:56,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 441 transitions. [2019-10-15 00:00:56,106 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 441 transitions. Word has length 18 [2019-10-15 00:00:56,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:00:56,107 INFO L462 AbstractCegarLoop]: Abstraction has 294 states and 441 transitions. [2019-10-15 00:00:56,108 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 00:00:56,108 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 441 transitions. [2019-10-15 00:00:56,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2019-10-15 00:00:56,116 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:00:56,117 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-15 00:00:56,118 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:00:56,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:00:56,119 INFO L82 PathProgramCache]: Analyzing trace with hash -138419591, now seen corresponding path program 1 times [2019-10-15 00:00:56,119 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:00:56,120 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784531643] [2019-10-15 00:00:56,120 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:00:56,120 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:00:56,120 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:00:56,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:00:56,396 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-15 00:00:56,397 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784531643] [2019-10-15 00:00:56,397 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1656876902] [2019-10-15 00:00:56,398 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 00:00:56,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:00:56,487 INFO L256 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-15 00:00:56,505 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 00:00:56,573 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:00:56,573 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 00:00:56,614 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:00:56,615 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-15 00:00:56,615 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [4] total 6 [2019-10-15 00:00:56,615 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495899447] [2019-10-15 00:00:56,617 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 00:00:56,617 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:00:56,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 00:00:56,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-15 00:00:56,618 INFO L87 Difference]: Start difference. First operand 294 states and 441 transitions. Second operand 4 states. [2019-10-15 00:00:57,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:00:57,608 INFO L93 Difference]: Finished difference Result 725 states and 1105 transitions. [2019-10-15 00:00:57,608 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 00:00:57,608 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 95 [2019-10-15 00:00:57,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:00:57,615 INFO L225 Difference]: With dead ends: 725 [2019-10-15 00:00:57,616 INFO L226 Difference]: Without dead ends: 723 [2019-10-15 00:00:57,617 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-15 00:00:57,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 723 states. [2019-10-15 00:00:57,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 723 to 437. [2019-10-15 00:00:57,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 437 states. [2019-10-15 00:00:57,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 437 states to 437 states and 663 transitions. [2019-10-15 00:00:57,653 INFO L78 Accepts]: Start accepts. Automaton has 437 states and 663 transitions. Word has length 95 [2019-10-15 00:00:57,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:00:57,654 INFO L462 AbstractCegarLoop]: Abstraction has 437 states and 663 transitions. [2019-10-15 00:00:57,655 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 00:00:57,655 INFO L276 IsEmpty]: Start isEmpty. Operand 437 states and 663 transitions. [2019-10-15 00:00:57,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2019-10-15 00:00:57,658 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:00:57,658 INFO L380 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 00:00:57,863 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 00:00:57,864 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:00:57,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:00:57,865 INFO L82 PathProgramCache]: Analyzing trace with hash 1240869957, now seen corresponding path program 1 times [2019-10-15 00:00:57,865 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:00:57,866 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126349514] [2019-10-15 00:00:57,866 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:00:57,866 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:00:57,866 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:00:57,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:00:58,176 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:00:58,176 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126349514] [2019-10-15 00:00:58,177 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:00:58,177 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-15 00:00:58,177 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110948399] [2019-10-15 00:00:58,179 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-15 00:00:58,180 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:00:58,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-15 00:00:58,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-15 00:00:58,185 INFO L87 Difference]: Start difference. First operand 437 states and 663 transitions. Second operand 5 states. [2019-10-15 00:00:59,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:00:59,200 INFO L93 Difference]: Finished difference Result 1023 states and 1558 transitions. [2019-10-15 00:00:59,201 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 00:00:59,201 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 137 [2019-10-15 00:00:59,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:00:59,205 INFO L225 Difference]: With dead ends: 1023 [2019-10-15 00:00:59,205 INFO L226 Difference]: Without dead ends: 592 [2019-10-15 00:00:59,207 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-15 00:00:59,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 592 states. [2019-10-15 00:00:59,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 592 to 588. [2019-10-15 00:00:59,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 588 states. [2019-10-15 00:00:59,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 588 states to 588 states and 850 transitions. [2019-10-15 00:00:59,245 INFO L78 Accepts]: Start accepts. Automaton has 588 states and 850 transitions. Word has length 137 [2019-10-15 00:00:59,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:00:59,246 INFO L462 AbstractCegarLoop]: Abstraction has 588 states and 850 transitions. [2019-10-15 00:00:59,246 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-15 00:00:59,246 INFO L276 IsEmpty]: Start isEmpty. Operand 588 states and 850 transitions. [2019-10-15 00:00:59,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2019-10-15 00:00:59,252 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:00:59,252 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:00:59,252 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:00:59,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:00:59,253 INFO L82 PathProgramCache]: Analyzing trace with hash -427365918, now seen corresponding path program 1 times [2019-10-15 00:00:59,253 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:00:59,254 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814308640] [2019-10-15 00:00:59,254 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:00:59,254 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:00:59,254 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:00:59,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:00:59,936 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 90 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:00:59,936 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814308640] [2019-10-15 00:00:59,936 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1050900953] [2019-10-15 00:00:59,937 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 00:01:00,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:01:00,017 INFO L256 TraceCheckSpWp]: Trace formula consists of 381 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-15 00:01:00,024 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 00:01:00,062 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 00:01:00,122 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 90 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:01:00,122 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 00:01:00,191 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 00:01:00,192 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 00:01:00,386 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 90 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:01:00,387 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [1914199524] [2019-10-15 00:01:00,393 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 208 [2019-10-15 00:01:00,450 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-15 00:01:00,451 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-15 00:01:04,953 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation.