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_label38.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 00:03:55,473 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 00:03:55,476 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 00:03:55,488 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-10-15 00:03:55,497 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 00:03:55,498 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 00:03:55,499 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 00:03:55,500 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 00:03:55,501 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 00:03:55,502 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 00:03:55,504 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 00:03:55,506 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 00:03:55,507 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 00:03:55,508 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 00:03:55,509 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 00:03:55,510 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 00:03:55,512 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 00:03:55,519 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 00:03:55,520 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 00:03:55,521 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 00:03:55,522 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 00:03:55,536 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 00:03:55,536 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 00:03:55,538 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 00:03:55,538 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 00:03:55,538 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 00:03:55,538 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 00:03:55,539 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 00:03:55,539 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 00:03:55,539 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 00:03:55,539 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 00:03:55,539 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 00:03:55,540 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 00:03:55,540 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 00:03:55,540 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 00:03:55,540 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 00:03:55,540 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 00:03:55,541 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 00:03:55,541 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 00:03:55,541 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 00:03:55,541 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 00:03:55,541 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 00:03:55,542 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 00:03:55,542 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 00:03:55,542 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 00:03:55,542 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 00:03:55,542 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 00:03:55,543 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 00:03:55,543 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 00:03:55,543 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 00:03:55,829 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 00:03:55,843 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 00:03:55,846 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 00:03:55,848 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 00:03:55,848 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 00:03:55,849 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem11_label38.c [2019-10-15 00:03:55,926 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/64b9cc170/c1b3b4d5819a49c383608ba7e808e099/FLAG6e6c94164 [2019-10-15 00:03:56,608 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 00:03:56,609 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem11_label38.c [2019-10-15 00:03:56,628 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/64b9cc170/c1b3b4d5819a49c383608ba7e808e099/FLAG6e6c94164 [2019-10-15 00:03:56,787 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/64b9cc170/c1b3b4d5819a49c383608ba7e808e099 [2019-10-15 00:03:56,799 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 00:03:56,801 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 00:03:56,804 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 00:03:56,804 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 00:03:56,808 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 00:03:56,809 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 12:03:56" (1/1) ... [2019-10-15 00:03:56,812 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1056708f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:03:56, skipping insertion in model container [2019-10-15 00:03:56,813 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 12:03:56" (1/1) ... [2019-10-15 00:03:56,821 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 00:03:56,889 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 00:03:57,562 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 00:03:57,576 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 00:03:57,890 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 00:03:57,918 INFO L192 MainTranslator]: Completed translation [2019-10-15 00:03:57,918 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:03:57 WrapperNode [2019-10-15 00:03:57,919 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 00:03:57,920 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 00:03:57,920 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 00:03:57,920 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 00:03:57,938 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:03:57" (1/1) ... [2019-10-15 00:03:57,939 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:03:57" (1/1) ... [2019-10-15 00:03:57,987 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:03:57" (1/1) ... [2019-10-15 00:03:57,990 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:03:57" (1/1) ... [2019-10-15 00:03:58,067 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:03:57" (1/1) ... [2019-10-15 00:03:58,095 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:03:57" (1/1) ... [2019-10-15 00:03:58,110 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:03:57" (1/1) ... [2019-10-15 00:03:58,123 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 00:03:58,124 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 00:03:58,125 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 00:03:58,125 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 00:03:58,126 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:03:57" (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 00:03:58,203 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 00:03:58,203 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 00:03:58,204 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-15 00:03:58,204 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 00:03:58,204 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-15 00:03:58,205 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 00:03:58,205 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 00:03:58,205 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-15 00:03:58,206 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 00:03:58,207 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 00:03:58,207 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 00:03:59,981 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 00:03:59,981 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-15 00:03:59,982 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 12:03:59 BoogieIcfgContainer [2019-10-15 00:03:59,983 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 00:03:59,984 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 00:03:59,984 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 00:03:59,987 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 00:03:59,988 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 12:03:56" (1/3) ... [2019-10-15 00:03:59,989 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c884066 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 12:03:59, skipping insertion in model container [2019-10-15 00:03:59,989 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:03:57" (2/3) ... [2019-10-15 00:03:59,989 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c884066 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 12:03:59, skipping insertion in model container [2019-10-15 00:03:59,990 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 12:03:59" (3/3) ... [2019-10-15 00:03:59,992 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem11_label38.c [2019-10-15 00:04:00,002 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 00:04:00,011 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 00:04:00,023 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 00:04:00,052 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 00:04:00,053 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 00:04:00,053 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 00:04:00,053 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 00:04:00,053 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 00:04:00,053 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 00:04:00,054 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 00:04:00,054 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 00:04:00,080 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states. [2019-10-15 00:04:00,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2019-10-15 00:04:00,091 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:04:00,092 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 00:04:00,094 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:04:00,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:04:00,100 INFO L82 PathProgramCache]: Analyzing trace with hash 1782601651, now seen corresponding path program 1 times [2019-10-15 00:04:00,110 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:04:00,110 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129721268] [2019-10-15 00:04:00,110 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:04:00,111 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:04:00,111 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:04:00,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:04:00,484 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 00:04:00,484 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129721268] [2019-10-15 00:04:00,485 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:04:00,485 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 00:04:00,486 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148525166] [2019-10-15 00:04:00,490 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 00:04:00,492 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:04:00,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 00:04:00,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 00:04:00,509 INFO L87 Difference]: Start difference. First operand 292 states. Second operand 3 states. [2019-10-15 00:04:01,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:04:01,965 INFO L93 Difference]: Finished difference Result 779 states and 1369 transitions. [2019-10-15 00:04:01,965 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 00:04:01,967 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 66 [2019-10-15 00:04:01,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:04:01,984 INFO L225 Difference]: With dead ends: 779 [2019-10-15 00:04:01,984 INFO L226 Difference]: Without dead ends: 425 [2019-10-15 00:04:01,992 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 00:04:02,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 425 states. [2019-10-15 00:04:02,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 425 to 420. [2019-10-15 00:04:02,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 420 states. [2019-10-15 00:04:02,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 420 states to 420 states and 666 transitions. [2019-10-15 00:04:02,072 INFO L78 Accepts]: Start accepts. Automaton has 420 states and 666 transitions. Word has length 66 [2019-10-15 00:04:02,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:04:02,072 INFO L462 AbstractCegarLoop]: Abstraction has 420 states and 666 transitions. [2019-10-15 00:04:02,073 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 00:04:02,073 INFO L276 IsEmpty]: Start isEmpty. Operand 420 states and 666 transitions. [2019-10-15 00:04:02,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2019-10-15 00:04:02,079 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:04:02,080 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-15 00:04:02,080 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:04:02,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:04:02,081 INFO L82 PathProgramCache]: Analyzing trace with hash -271473866, now seen corresponding path program 1 times [2019-10-15 00:04:02,081 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:04:02,081 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065229450] [2019-10-15 00:04:02,081 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:04:02,082 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:04:02,082 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:04:02,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:04:02,325 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 59 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:04:02,326 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065229450] [2019-10-15 00:04:02,326 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:04:02,327 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-15 00:04:02,327 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802412755] [2019-10-15 00:04:02,329 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-15 00:04:02,329 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:04:02,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-15 00:04:02,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-15 00:04:02,330 INFO L87 Difference]: Start difference. First operand 420 states and 666 transitions. Second operand 6 states. [2019-10-15 00:04:05,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:04:05,060 INFO L93 Difference]: Finished difference Result 1665 states and 2806 transitions. [2019-10-15 00:04:05,061 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-15 00:04:05,061 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 136 [2019-10-15 00:04:05,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:04:05,074 INFO L225 Difference]: With dead ends: 1665 [2019-10-15 00:04:05,074 INFO L226 Difference]: Without dead ends: 1251 [2019-10-15 00:04:05,077 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2019-10-15 00:04:05,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1251 states. [2019-10-15 00:04:05,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1251 to 1217. [2019-10-15 00:04:05,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1217 states. [2019-10-15 00:04:05,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1217 states to 1217 states and 1739 transitions. [2019-10-15 00:04:05,174 INFO L78 Accepts]: Start accepts. Automaton has 1217 states and 1739 transitions. Word has length 136 [2019-10-15 00:04:05,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:04:05,175 INFO L462 AbstractCegarLoop]: Abstraction has 1217 states and 1739 transitions. [2019-10-15 00:04:05,175 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-15 00:04:05,176 INFO L276 IsEmpty]: Start isEmpty. Operand 1217 states and 1739 transitions. [2019-10-15 00:04:05,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2019-10-15 00:04:05,180 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:04:05,181 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-15 00:04:05,181 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:04:05,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:04:05,181 INFO L82 PathProgramCache]: Analyzing trace with hash 1985877122, now seen corresponding path program 1 times [2019-10-15 00:04:05,182 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:04:05,182 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372893824] [2019-10-15 00:04:05,182 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:04:05,182 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:04:05,183 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:04:05,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:04:05,394 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 59 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:04:05,394 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372893824] [2019-10-15 00:04:05,394 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:04:05,395 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-15 00:04:05,395 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115746500] [2019-10-15 00:04:05,396 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-15 00:04:05,396 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:04:05,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-15 00:04:05,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-10-15 00:04:05,397 INFO L87 Difference]: Start difference. First operand 1217 states and 1739 transitions. Second operand 6 states. [2019-10-15 00:04:07,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:04:07,269 INFO L93 Difference]: Finished difference Result 3448 states and 5147 transitions. [2019-10-15 00:04:07,270 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 00:04:07,270 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 146 [2019-10-15 00:04:07,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:04:07,292 INFO L225 Difference]: With dead ends: 3448 [2019-10-15 00:04:07,292 INFO L226 Difference]: Without dead ends: 2237 [2019-10-15 00:04:07,298 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 00:04:07,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2237 states. [2019-10-15 00:04:07,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2237 to 2212. [2019-10-15 00:04:07,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2212 states. [2019-10-15 00:04:07,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2212 states to 2212 states and 3011 transitions. [2019-10-15 00:04:07,464 INFO L78 Accepts]: Start accepts. Automaton has 2212 states and 3011 transitions. Word has length 146 [2019-10-15 00:04:07,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:04:07,466 INFO L462 AbstractCegarLoop]: Abstraction has 2212 states and 3011 transitions. [2019-10-15 00:04:07,466 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-15 00:04:07,466 INFO L276 IsEmpty]: Start isEmpty. Operand 2212 states and 3011 transitions. [2019-10-15 00:04:07,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2019-10-15 00:04:07,483 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:04:07,484 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 00:04:07,484 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:04:07,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:04:07,485 INFO L82 PathProgramCache]: Analyzing trace with hash -1482166744, now seen corresponding path program 1 times [2019-10-15 00:04:07,485 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:04:07,485 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591286226] [2019-10-15 00:04:07,485 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:04:07,486 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:04:07,486 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:04:07,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:04:07,760 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 186 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:04:07,760 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591286226] [2019-10-15 00:04:07,761 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [833755695] [2019-10-15 00:04:07,761 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 00:04:07,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:04:07,863 INFO L256 TraceCheckSpWp]: Trace formula consists of 414 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-15 00:04:07,876 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 00:04:07,933 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 186 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:04:07,934 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 00:04:08,106 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 186 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:04:08,106 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [454677898] [2019-10-15 00:04:08,112 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 210 [2019-10-15 00:04:08,163 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-15 00:04:08,163 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-15 00:04:33,371 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-10-15 00:04:33,373 INFO L272 AbstractInterpreter]: Visited 78 different actions 78 times. Never merged. Never widened. Performed 205 root evaluator evaluations with a maximum evaluation depth of 16. Performed 205 inverse root evaluator evaluations with a maximum inverse evaluation depth of 16. Never found a fixpoint. Largest state had 28 variables. [2019-10-15 00:04:33,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:04:33,378 INFO L536 sIntCurrentIteration]: Generating AbsInt predicates