/usr/bin/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_label10.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 22:45:25,890 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 22:45:25,893 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 22:45:25,912 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-06 22:45:25,922 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 22:45:25,923 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 22:45:25,924 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 22:45:25,925 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 22:45:25,926 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 22:45:25,927 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 22:45:25,929 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 22:45:25,931 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 22:45:25,932 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 22:45:25,933 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 22:45:25,934 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 22:45:25,935 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 22:45:25,940 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 22:45:25,965 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 [2019-11-06 22:45:25,986 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 22:45:25,987 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 22:45:25,988 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 22:45:25,988 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 22:45:25,988 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 22:45:25,989 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 22:45:25,989 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 22:45:25,989 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 22:45:25,989 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 22:45:25,989 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 22:45:25,990 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 22:45:25,990 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 22:45:25,990 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 22:45:25,990 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 22:45:25,990 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 22:45:25,990 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 22:45:25,991 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 22:45:25,991 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 22:45:25,991 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 22:45:25,991 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 22:45:25,991 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 22:45:25,992 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 22:45:25,992 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 22:45:25,992 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 22:45:25,992 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 22:45:25,992 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 22:45:25,993 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 22:45:25,993 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 22:45:25,993 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 [2019-11-06 22:45:26,276 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 22:45:26,289 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 22:45:26,293 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 22:45:26,295 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 22:45:26,295 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 22:45:26,296 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem11_label10.c [2019-11-06 22:45:26,362 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/05310d5a1/3b019c251131483ea95a180d5476445d/FLAG6bd57678a [2019-11-06 22:45:26,935 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 22:45:26,936 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem11_label10.c [2019-11-06 22:45:26,951 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/05310d5a1/3b019c251131483ea95a180d5476445d/FLAG6bd57678a [2019-11-06 22:45:27,132 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/05310d5a1/3b019c251131483ea95a180d5476445d [2019-11-06 22:45:27,143 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 22:45:27,145 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 22:45:27,146 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 22:45:27,146 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 22:45:27,150 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 22:45:27,151 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:45:27" (1/1) ... [2019-11-06 22:45:27,154 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2f38f459 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:45:27, skipping insertion in model container [2019-11-06 22:45:27,154 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:45:27" (1/1) ... [2019-11-06 22:45:27,162 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 22:45:27,219 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 22:45:27,957 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:45:27,962 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 22:45:28,106 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:45:28,124 INFO L192 MainTranslator]: Completed translation [2019-11-06 22:45:28,125 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:45:28 WrapperNode [2019-11-06 22:45:28,125 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 22:45:28,126 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 22:45:28,126 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 22:45:28,126 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 22:45:28,141 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:45:28" (1/1) ... [2019-11-06 22:45:28,141 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:45:28" (1/1) ... [2019-11-06 22:45:28,181 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:45:28" (1/1) ... [2019-11-06 22:45:28,182 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:45:28" (1/1) ... [2019-11-06 22:45:28,272 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:45:28" (1/1) ... [2019-11-06 22:45:28,288 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:45:28" (1/1) ... [2019-11-06 22:45:28,297 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:45:28" (1/1) ... [2019-11-06 22:45:28,310 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 22:45:28,310 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 22:45:28,310 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 22:45:28,311 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 22:45:28,312 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:45:28" (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 [2019-11-06 22:45:28,403 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 22:45:28,403 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 22:45:28,403 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-06 22:45:28,403 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 22:45:28,404 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-06 22:45:28,405 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 22:45:28,405 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 22:45:28,405 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-06 22:45:28,405 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 22:45:28,406 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 22:45:28,406 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 22:45:30,329 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 22:45:30,330 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-06 22:45:30,334 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:45:30 BoogieIcfgContainer [2019-11-06 22:45:30,335 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 22:45:30,336 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 22:45:30,336 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 22:45:30,340 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 22:45:30,341 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:45:27" (1/3) ... [2019-11-06 22:45:30,342 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7500cb50 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:45:30, skipping insertion in model container [2019-11-06 22:45:30,342 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:45:28" (2/3) ... [2019-11-06 22:45:30,343 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7500cb50 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:45:30, skipping insertion in model container [2019-11-06 22:45:30,343 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:45:30" (3/3) ... [2019-11-06 22:45:30,354 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem11_label10.c [2019-11-06 22:45:30,365 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 22:45:30,375 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 22:45:30,387 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 22:45:30,433 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 22:45:30,433 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 22:45:30,435 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 22:45:30,435 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 22:45:30,436 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 22:45:30,436 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 22:45:30,436 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 22:45:30,436 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 22:45:30,472 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states. [2019-11-06 22:45:30,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-11-06 22:45:30,480 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:45:30,482 INFO L410 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] [2019-11-06 22:45:30,484 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:45:30,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:45:30,491 INFO L82 PathProgramCache]: Analyzing trace with hash 734030971, now seen corresponding path program 1 times [2019-11-06 22:45:30,526 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:45:30,527 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406303904] [2019-11-06 22:45:30,527 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:45:30,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:45:30,854 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:45:30,855 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406303904] [2019-11-06 22:45:30,855 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:45:30,856 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 22:45:30,857 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897536619] [2019-11-06 22:45:30,862 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 22:45:30,864 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:45:30,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 22:45:30,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-06 22:45:30,882 INFO L87 Difference]: Start difference. First operand 292 states. Second operand 4 states. [2019-11-06 22:45:33,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:45:33,343 INFO L93 Difference]: Finished difference Result 997 states and 1776 transitions. [2019-11-06 22:45:33,344 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 22:45:33,345 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 28 [2019-11-06 22:45:33,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:45:33,367 INFO L225 Difference]: With dead ends: 997 [2019-11-06 22:45:33,367 INFO L226 Difference]: Without dead ends: 623 [2019-11-06 22:45:33,377 INFO L630 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 [2019-11-06 22:45:33,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 623 states. [2019-11-06 22:45:33,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 623 to 620. [2019-11-06 22:45:33,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 620 states. [2019-11-06 22:45:33,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 620 states to 620 states and 896 transitions. [2019-11-06 22:45:33,526 INFO L78 Accepts]: Start accepts. Automaton has 620 states and 896 transitions. Word has length 28 [2019-11-06 22:45:33,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:45:33,527 INFO L462 AbstractCegarLoop]: Abstraction has 620 states and 896 transitions. [2019-11-06 22:45:33,527 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 22:45:33,528 INFO L276 IsEmpty]: Start isEmpty. Operand 620 states and 896 transitions. [2019-11-06 22:45:33,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2019-11-06 22:45:33,536 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:45:33,536 INFO L410 BasicCegarLoop]: trace histogram [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] [2019-11-06 22:45:33,537 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:45:33,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:45:33,538 INFO L82 PathProgramCache]: Analyzing trace with hash 1011694458, now seen corresponding path program 1 times [2019-11-06 22:45:33,538 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:45:33,539 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073504968] [2019-11-06 22:45:33,539 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:45:33,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:45:33,879 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:45:33,880 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073504968] [2019-11-06 22:45:33,880 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:45:33,880 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-06 22:45:33,881 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132113775] [2019-11-06 22:45:33,886 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 22:45:33,887 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:45:33,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 22:45:33,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:45:33,888 INFO L87 Difference]: Start difference. First operand 620 states and 896 transitions. Second operand 6 states. [2019-11-06 22:45:35,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:45:35,533 INFO L93 Difference]: Finished difference Result 1833 states and 2715 transitions. [2019-11-06 22:45:35,533 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 22:45:35,533 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 100 [2019-11-06 22:45:35,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:45:35,544 INFO L225 Difference]: With dead ends: 1833 [2019-11-06 22:45:35,544 INFO L226 Difference]: Without dead ends: 1219 [2019-11-06 22:45:35,546 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-11-06 22:45:35,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1219 states. [2019-11-06 22:45:35,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1219 to 1200. [2019-11-06 22:45:35,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1200 states. [2019-11-06 22:45:35,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1200 states to 1200 states and 1735 transitions. [2019-11-06 22:45:35,604 INFO L78 Accepts]: Start accepts. Automaton has 1200 states and 1735 transitions. Word has length 100 [2019-11-06 22:45:35,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:45:35,604 INFO L462 AbstractCegarLoop]: Abstraction has 1200 states and 1735 transitions. [2019-11-06 22:45:35,604 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 22:45:35,605 INFO L276 IsEmpty]: Start isEmpty. Operand 1200 states and 1735 transitions. [2019-11-06 22:45:35,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2019-11-06 22:45:35,607 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:45:35,607 INFO L410 BasicCegarLoop]: trace histogram [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] [2019-11-06 22:45:35,607 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:45:35,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:45:35,608 INFO L82 PathProgramCache]: Analyzing trace with hash -356402163, now seen corresponding path program 1 times [2019-11-06 22:45:35,608 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:45:35,608 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419416197] [2019-11-06 22:45:35,608 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:45:35,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:45:35,753 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:45:35,755 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419416197] [2019-11-06 22:45:35,755 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:45:35,755 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 22:45:35,755 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288042155] [2019-11-06 22:45:35,758 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 22:45:35,758 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:45:35,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 22:45:35,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-06 22:45:35,759 INFO L87 Difference]: Start difference. First operand 1200 states and 1735 transitions. Second operand 4 states. [2019-11-06 22:45:37,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:45:37,638 INFO L93 Difference]: Finished difference Result 3552 states and 5208 transitions. [2019-11-06 22:45:37,639 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 22:45:37,639 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 101 [2019-11-06 22:45:37,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:45:37,655 INFO L225 Difference]: With dead ends: 3552 [2019-11-06 22:45:37,655 INFO L226 Difference]: Without dead ends: 2358 [2019-11-06 22:45:37,659 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-06 22:45:37,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2358 states. [2019-11-06 22:45:37,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2358 to 2153. [2019-11-06 22:45:37,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2153 states. [2019-11-06 22:45:37,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2153 states to 2153 states and 3070 transitions. [2019-11-06 22:45:37,739 INFO L78 Accepts]: Start accepts. Automaton has 2153 states and 3070 transitions. Word has length 101 [2019-11-06 22:45:37,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:45:37,740 INFO L462 AbstractCegarLoop]: Abstraction has 2153 states and 3070 transitions. [2019-11-06 22:45:37,740 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 22:45:37,740 INFO L276 IsEmpty]: Start isEmpty. Operand 2153 states and 3070 transitions. [2019-11-06 22:45:37,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2019-11-06 22:45:37,744 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:45:37,744 INFO L410 BasicCegarLoop]: trace histogram [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] [2019-11-06 22:45:37,744 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:45:37,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:45:37,745 INFO L82 PathProgramCache]: Analyzing trace with hash -1268458330, now seen corresponding path program 1 times [2019-11-06 22:45:37,745 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:45:37,745 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677317931] [2019-11-06 22:45:37,745 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:45:37,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:45:38,005 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:45:38,006 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677317931] [2019-11-06 22:45:38,006 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:45:38,006 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-06 22:45:38,006 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539770010] [2019-11-06 22:45:38,008 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 22:45:38,009 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:45:38,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 22:45:38,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:45:38,009 INFO L87 Difference]: Start difference. First operand 2153 states and 3070 transitions. Second operand 6 states. [2019-11-06 22:45:40,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:45:40,630 INFO L93 Difference]: Finished difference Result 8027 states and 14009 transitions. [2019-11-06 22:45:40,631 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-06 22:45:40,631 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 126 [2019-11-06 22:45:40,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:45:40,683 INFO L225 Difference]: With dead ends: 8027 [2019-11-06 22:45:40,683 INFO L226 Difference]: Without dead ends: 5880 [2019-11-06 22:45:40,693 INFO L630 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 [2019-11-06 22:45:40,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5880 states. [2019-11-06 22:45:40,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5880 to 5142. [2019-11-06 22:45:40,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5142 states. [2019-11-06 22:45:40,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5142 states to 5142 states and 7404 transitions. [2019-11-06 22:45:40,913 INFO L78 Accepts]: Start accepts. Automaton has 5142 states and 7404 transitions. Word has length 126 [2019-11-06 22:45:40,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:45:40,913 INFO L462 AbstractCegarLoop]: Abstraction has 5142 states and 7404 transitions. [2019-11-06 22:45:40,914 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 22:45:40,914 INFO L276 IsEmpty]: Start isEmpty. Operand 5142 states and 7404 transitions. [2019-11-06 22:45:40,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2019-11-06 22:45:40,918 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:45:40,918 INFO L410 BasicCegarLoop]: trace histogram [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, 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] [2019-11-06 22:45:40,918 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:45:40,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:45:40,919 INFO L82 PathProgramCache]: Analyzing trace with hash -1769948106, now seen corresponding path program 1 times [2019-11-06 22:45:40,919 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:45:40,919 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72269343] [2019-11-06 22:45:40,919 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:45:40,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:45:41,057 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 111 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:45:41,057 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72269343] [2019-11-06 22:45:41,058 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1281269584] [2019-11-06 22:45:41,058 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 [2019-11-06 22:45:41,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:45:41,208 INFO L256 TraceCheckSpWp]: Trace formula consists of 379 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-06 22:45:41,219 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:45:41,267 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 111 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:45:41,268 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:45:41,405 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 111 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:45:41,406 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [1089284921] [2019-11-06 22:45:41,412 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 174 [2019-11-06 22:45:41,474 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-11-06 22:45:41,474 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2)