/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/Problem10_label23.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 22:42:38,505 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 22:42:38,507 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 22:42:38,519 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-06 22:42:38,528 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 22:42:38,529 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 22:42:38,530 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 22:42:38,531 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 22:42:38,532 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 22:42:38,532 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 22:42:38,534 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 22:42:38,536 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 22:42:38,537 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 22:42:38,538 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 22:42:38,540 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 22:42:38,540 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 22:42:38,542 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 22:42:38,550 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 22:42:38,550 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 22:42:38,551 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 22:42:38,552 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 22:42:38,566 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 22:42:38,566 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 22:42:38,567 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 22:42:38,567 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 22:42:38,568 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 22:42:38,568 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 22:42:38,568 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 22:42:38,568 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 22:42:38,568 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 22:42:38,569 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 22:42:38,569 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 22:42:38,569 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 22:42:38,569 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 22:42:38,569 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 22:42:38,569 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 22:42:38,570 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 22:42:38,570 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 22:42:38,570 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 22:42:38,570 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 22:42:38,570 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 22:42:38,571 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 22:42:38,571 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 22:42:38,571 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 22:42:38,571 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 22:42:38,571 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 22:42:38,572 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 22:42:38,572 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 22:42:38,572 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 22:42:38,572 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 22:42:38,839 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 22:42:38,852 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 22:42:38,855 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 22:42:38,856 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 22:42:38,857 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 22:42:38,857 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem10_label23.c [2019-11-06 22:42:38,930 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2dccf1ff6/1b637a453bc44288869c9d52fa45bc1f/FLAG308d92941 [2019-11-06 22:42:39,548 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 22:42:39,549 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem10_label23.c [2019-11-06 22:42:39,561 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2dccf1ff6/1b637a453bc44288869c9d52fa45bc1f/FLAG308d92941 [2019-11-06 22:42:39,829 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2dccf1ff6/1b637a453bc44288869c9d52fa45bc1f [2019-11-06 22:42:39,839 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 22:42:39,840 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 22:42:39,841 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 22:42:39,841 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 22:42:39,845 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 22:42:39,845 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:42:39" (1/1) ... [2019-11-06 22:42:39,848 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@506447d2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:42:39, skipping insertion in model container [2019-11-06 22:42:39,849 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:42:39" (1/1) ... [2019-11-06 22:42:39,856 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 22:42:39,901 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 22:42:40,391 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:42:40,395 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 22:42:40,494 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:42:40,511 INFO L192 MainTranslator]: Completed translation [2019-11-06 22:42:40,511 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:42:40 WrapperNode [2019-11-06 22:42:40,511 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 22:42:40,512 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 22:42:40,512 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 22:42:40,512 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 22:42:40,526 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:42:40" (1/1) ... [2019-11-06 22:42:40,526 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:42:40" (1/1) ... [2019-11-06 22:42:40,551 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:42:40" (1/1) ... [2019-11-06 22:42:40,555 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:42:40" (1/1) ... [2019-11-06 22:42:40,592 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:42:40" (1/1) ... [2019-11-06 22:42:40,609 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:42:40" (1/1) ... [2019-11-06 22:42:40,614 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:42:40" (1/1) ... [2019-11-06 22:42:40,627 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 22:42:40,628 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 22:42:40,628 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 22:42:40,628 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 22:42:40,629 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:42:40" (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 22:42:40,709 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 22:42:40,710 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 22:42:40,710 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-06 22:42:40,710 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 22:42:40,710 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-06 22:42:40,711 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 22:42:40,711 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 22:42:40,711 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-06 22:42:40,712 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 22:42:40,712 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 22:42:40,712 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 22:42:41,988 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 22:42:41,988 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-06 22:42:41,993 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:42:41 BoogieIcfgContainer [2019-11-06 22:42:41,993 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 22:42:41,994 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 22:42:41,995 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 22:42:42,000 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 22:42:42,000 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:42:39" (1/3) ... [2019-11-06 22:42:42,001 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4158c750 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:42:42, skipping insertion in model container [2019-11-06 22:42:42,002 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:42:40" (2/3) ... [2019-11-06 22:42:42,003 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4158c750 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:42:42, skipping insertion in model container [2019-11-06 22:42:42,003 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:42:41" (3/3) ... [2019-11-06 22:42:42,008 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem10_label23.c [2019-11-06 22:42:42,022 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 22:42:42,031 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 22:42:42,043 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 22:42:42,081 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 22:42:42,081 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 22:42:42,082 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 22:42:42,082 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 22:42:42,082 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 22:42:42,083 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 22:42:42,083 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 22:42:42,083 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 22:42:42,107 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states. [2019-11-06 22:42:42,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2019-11-06 22:42:42,120 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:42:42,122 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, 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 22:42:42,124 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:42:42,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:42:42,130 INFO L82 PathProgramCache]: Analyzing trace with hash -2063812481, now seen corresponding path program 1 times [2019-11-06 22:42:42,139 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:42:42,140 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30665134] [2019-11-06 22:42:42,140 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:42:42,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:42:42,486 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 22:42:42,487 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30665134] [2019-11-06 22:42:42,487 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:42:42,488 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-06 22:42:42,490 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287899149] [2019-11-06 22:42:42,497 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 22:42:42,499 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:42:42,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 22:42:42,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 22:42:42,517 INFO L87 Difference]: Start difference. First operand 215 states. Second operand 3 states. [2019-11-06 22:42:43,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:42:43,584 INFO L93 Difference]: Finished difference Result 571 states and 989 transitions. [2019-11-06 22:42:43,588 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 22:42:43,590 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 52 [2019-11-06 22:42:43,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:42:43,619 INFO L225 Difference]: With dead ends: 571 [2019-11-06 22:42:43,619 INFO L226 Difference]: Without dead ends: 294 [2019-11-06 22:42:43,633 INFO L630 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 [2019-11-06 22:42:43,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2019-11-06 22:42:43,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 294. [2019-11-06 22:42:43,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 294 states. [2019-11-06 22:42:43,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 446 transitions. [2019-11-06 22:42:43,754 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 446 transitions. Word has length 52 [2019-11-06 22:42:43,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:42:43,755 INFO L462 AbstractCegarLoop]: Abstraction has 294 states and 446 transitions. [2019-11-06 22:42:43,755 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 22:42:43,755 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 446 transitions. [2019-11-06 22:42:43,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2019-11-06 22:42:43,761 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:42:43,762 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, 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] [2019-11-06 22:42:43,762 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:42:43,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:42:43,763 INFO L82 PathProgramCache]: Analyzing trace with hash -1911288886, now seen corresponding path program 1 times [2019-11-06 22:42:43,763 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:42:43,763 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633830966] [2019-11-06 22:42:43,763 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:42:43,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:42:43,999 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:42:44,000 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633830966] [2019-11-06 22:42:44,000 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:42:44,000 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-06 22:42:44,000 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541114755] [2019-11-06 22:42:44,002 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 22:42:44,003 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:42:44,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 22:42:44,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-06 22:42:44,003 INFO L87 Difference]: Start difference. First operand 294 states and 446 transitions. Second operand 5 states. [2019-11-06 22:42:44,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:42:44,988 INFO L93 Difference]: Finished difference Result 888 states and 1367 transitions. [2019-11-06 22:42:44,988 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-06 22:42:44,989 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 134 [2019-11-06 22:42:44,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:42:44,994 INFO L225 Difference]: With dead ends: 888 [2019-11-06 22:42:44,995 INFO L226 Difference]: Without dead ends: 600 [2019-11-06 22:42:44,996 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-11-06 22:42:44,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 600 states. [2019-11-06 22:42:45,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 600 to 592. [2019-11-06 22:42:45,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 592 states. [2019-11-06 22:42:45,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 592 states to 592 states and 867 transitions. [2019-11-06 22:42:45,037 INFO L78 Accepts]: Start accepts. Automaton has 592 states and 867 transitions. Word has length 134 [2019-11-06 22:42:45,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:42:45,038 INFO L462 AbstractCegarLoop]: Abstraction has 592 states and 867 transitions. [2019-11-06 22:42:45,038 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 22:42:45,039 INFO L276 IsEmpty]: Start isEmpty. Operand 592 states and 867 transitions. [2019-11-06 22:42:45,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2019-11-06 22:42:45,042 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:42:45,043 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:42:45,043 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:42:45,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:42:45,043 INFO L82 PathProgramCache]: Analyzing trace with hash 614464170, now seen corresponding path program 1 times [2019-11-06 22:42:45,044 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:42:45,044 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640565033] [2019-11-06 22:42:45,044 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:42:45,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:42:45,288 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:42:45,288 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640565033] [2019-11-06 22:42:45,289 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:42:45,289 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-06 22:42:45,290 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607694817] [2019-11-06 22:42:45,292 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 22:42:45,292 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:42:45,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 22:42:45,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:42:45,293 INFO L87 Difference]: Start difference. First operand 592 states and 867 transitions. Second operand 6 states. [2019-11-06 22:42:46,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:42:46,271 INFO L93 Difference]: Finished difference Result 1490 states and 2245 transitions. [2019-11-06 22:42:46,271 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 22:42:46,271 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 150 [2019-11-06 22:42:46,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:42:46,278 INFO L225 Difference]: With dead ends: 1490 [2019-11-06 22:42:46,279 INFO L226 Difference]: Without dead ends: 904 [2019-11-06 22:42:46,281 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 22:42:46,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 904 states. [2019-11-06 22:42:46,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 904 to 890. [2019-11-06 22:42:46,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 890 states. [2019-11-06 22:42:46,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 890 states to 890 states and 1300 transitions. [2019-11-06 22:42:46,321 INFO L78 Accepts]: Start accepts. Automaton has 890 states and 1300 transitions. Word has length 150 [2019-11-06 22:42:46,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:42:46,322 INFO L462 AbstractCegarLoop]: Abstraction has 890 states and 1300 transitions. [2019-11-06 22:42:46,322 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 22:42:46,322 INFO L276 IsEmpty]: Start isEmpty. Operand 890 states and 1300 transitions. [2019-11-06 22:42:46,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2019-11-06 22:42:46,328 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:42:46,328 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:42:46,328 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:42:46,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:42:46,329 INFO L82 PathProgramCache]: Analyzing trace with hash 628433146, now seen corresponding path program 1 times [2019-11-06 22:42:46,329 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:42:46,329 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896287887] [2019-11-06 22:42:46,329 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:42:46,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:42:46,546 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:42:46,546 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896287887] [2019-11-06 22:42:46,546 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:42:46,546 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-06 22:42:46,547 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458583323] [2019-11-06 22:42:46,547 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 22:42:46,548 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:42:46,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 22:42:46,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:42:46,548 INFO L87 Difference]: Start difference. First operand 890 states and 1300 transitions. Second operand 6 states. [2019-11-06 22:42:47,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:42:47,506 INFO L93 Difference]: Finished difference Result 2104 states and 3183 transitions. [2019-11-06 22:42:47,507 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 22:42:47,507 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 174 [2019-11-06 22:42:47,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:42:47,517 INFO L225 Difference]: With dead ends: 2104 [2019-11-06 22:42:47,517 INFO L226 Difference]: Without dead ends: 1220 [2019-11-06 22:42:47,520 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 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 22:42:47,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1220 states. [2019-11-06 22:42:47,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1220 to 1192. [2019-11-06 22:42:47,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1192 states. [2019-11-06 22:42:47,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1192 states to 1192 states and 1616 transitions. [2019-11-06 22:42:47,591 INFO L78 Accepts]: Start accepts. Automaton has 1192 states and 1616 transitions. Word has length 174 [2019-11-06 22:42:47,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:42:47,593 INFO L462 AbstractCegarLoop]: Abstraction has 1192 states and 1616 transitions. [2019-11-06 22:42:47,593 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 22:42:47,593 INFO L276 IsEmpty]: Start isEmpty. Operand 1192 states and 1616 transitions. [2019-11-06 22:42:47,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2019-11-06 22:42:47,600 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:42:47,600 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:42:47,600 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:42:47,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:42:47,601 INFO L82 PathProgramCache]: Analyzing trace with hash 880887528, now seen corresponding path program 1 times [2019-11-06 22:42:47,601 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:42:47,602 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375842123] [2019-11-06 22:42:47,602 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:42:47,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:42:48,178 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 167 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:42:48,178 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375842123] [2019-11-06 22:42:48,179 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [882688761] [2019-11-06 22:42:48,179 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 22:42:48,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:42:48,283 INFO L256 TraceCheckSpWp]: Trace formula consists of 390 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 22:42:48,304 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:42:48,457 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 167 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:42:48,457 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:42:48,639 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 167 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:42:48,640 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [1132075687] [2019-11-06 22:42:48,647 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 214 [2019-11-06 22:42:48,704 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-11-06 22:42:48,705 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-11-06 22:43:00,411 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-11-06 22:43:17,332 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-11-06 22:43:17,335 INFO L272 AbstractInterpreter]: Visited 90 different actions 173 times. Merged at 3 different actions 3 times. Never widened. Performed 307 root evaluator evaluations with a maximum evaluation depth of 16. Performed 307 inverse root evaluator evaluations with a maximum inverse evaluation depth of 16. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2019-11-06 22:43:17,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:43:17,338 INFO L536 sIntCurrentIteration]: Generating AbsInt predicates