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/ai/svcomp-Reach-32bit-Automizer_Default+AIv2_INT.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem11_label08.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-112bae1 [2019-09-09 14:59:35,466 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-09 14:59:35,468 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-09 14:59:35,480 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-09-09 14:59:35,480 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-09-09 14:59:35,481 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-09-09 14:59:35,483 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-09-09 14:59:35,485 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-09-09 14:59:35,486 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-09-09 14:59:35,487 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-09-09 14:59:35,488 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-09-09 14:59:35,489 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-09-09 14:59:35,489 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-09 14:59:35,490 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-09 14:59:35,491 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-09 14:59:35,492 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-09 14:59:35,493 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-09 14:59:35,494 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-09 14:59:35,495 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-09 14:59:35,497 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-09 14:59:35,499 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-09 14:59:35,499 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-09 14:59:35,500 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-09 14:59:35,501 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-09 14:59:35,503 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-09-09 14:59:35,506 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-09-09 14:59:35,507 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-09-09 14:59:35,508 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-09-09 14:59:35,508 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-09-09 14:59:35,509 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-09-09 14:59:35,509 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-09-09 14:59:35,510 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-09-09 14:59:35,510 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-09-09 14:59:35,510 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-09 14:59:35,511 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-09 14:59:35,512 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-09 14:59:35,513 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/svcomp-Reach-32bit-Automizer_Default+AIv2_INT.epf [2019-09-09 14:59:35,534 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-09 14:59:35,535 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-09 14:59:35,535 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-09-09 14:59:35,535 INFO L138 SettingsManager]: * Log level for plugins=info [2019-09-09 14:59:35,536 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-09-09 14:59:35,536 INFO L138 SettingsManager]: * User list type=DISABLED [2019-09-09 14:59:35,536 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-09-09 14:59:35,536 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-09-09 14:59:35,537 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-09-09 14:59:35,537 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-09-09 14:59:35,539 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-09 14:59:35,539 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-09 14:59:35,539 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-09 14:59:35,540 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-09 14:59:35,540 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-09 14:59:35,540 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-09 14:59:35,540 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-09 14:59:35,540 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-09 14:59:35,541 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-09 14:59:35,541 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-09 14:59:35,541 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-09 14:59:35,541 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-09-09 14:59:35,542 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-09 14:59:35,542 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-09 14:59:35,542 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-09 14:59:35,542 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-09 14:59:35,542 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-09-09 14:59:35,543 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-09 14:59:35,543 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-09 14:59:35,544 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-09-09 14:59:35,593 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-09 14:59:35,606 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-09 14:59:35,609 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-09 14:59:35,611 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-09 14:59:35,611 INFO L275 PluginConnector]: CDTParser initialized [2019-09-09 14:59:35,612 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem11_label08.c [2019-09-09 14:59:35,673 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/443e4af08/ca441ea763074c22be03da9542b35972/FLAG6d04d4c5f [2019-09-09 14:59:36,342 INFO L306 CDTParser]: Found 1 translation units. [2019-09-09 14:59:36,343 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem11_label08.c [2019-09-09 14:59:36,362 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/443e4af08/ca441ea763074c22be03da9542b35972/FLAG6d04d4c5f [2019-09-09 14:59:36,568 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/443e4af08/ca441ea763074c22be03da9542b35972 [2019-09-09 14:59:36,577 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-09 14:59:36,579 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-09 14:59:36,580 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-09 14:59:36,580 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-09 14:59:36,583 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-09 14:59:36,584 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 02:59:36" (1/1) ... [2019-09-09 14:59:36,587 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@a2301ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 02:59:36, skipping insertion in model container [2019-09-09 14:59:36,588 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 02:59:36" (1/1) ... [2019-09-09 14:59:36,595 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-09 14:59:36,677 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-09 14:59:37,491 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 14:59:37,496 INFO L188 MainTranslator]: Completed pre-run [2019-09-09 14:59:37,688 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 14:59:37,708 INFO L192 MainTranslator]: Completed translation [2019-09-09 14:59:37,708 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 02:59:37 WrapperNode [2019-09-09 14:59:37,708 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-09 14:59:37,709 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-09 14:59:37,709 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-09 14:59:37,710 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-09 14:59:37,724 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 02:59:37" (1/1) ... [2019-09-09 14:59:37,726 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 02:59:37" (1/1) ... [2019-09-09 14:59:37,764 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 02:59:37" (1/1) ... [2019-09-09 14:59:37,764 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 02:59:37" (1/1) ... [2019-09-09 14:59:37,824 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 02:59:37" (1/1) ... [2019-09-09 14:59:37,839 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 02:59:37" (1/1) ... [2019-09-09 14:59:37,848 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 02:59:37" (1/1) ... [2019-09-09 14:59:37,860 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-09 14:59:37,861 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-09 14:59:37,861 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-09 14:59:37,861 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-09 14:59:37,863 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 02:59:37" (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 [2019-09-09 14:59:37,934 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-09 14:59:37,934 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-09 14:59:37,935 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-09-09 14:59:37,935 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-09 14:59:37,935 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-09-09 14:59:37,935 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-09 14:59:37,935 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-09 14:59:37,935 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-09-09 14:59:37,935 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-09 14:59:37,935 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-09 14:59:37,936 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-09 14:59:39,837 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-09 14:59:39,841 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-09-09 14:59:39,844 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 02:59:39 BoogieIcfgContainer [2019-09-09 14:59:39,844 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-09 14:59:39,846 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-09 14:59:39,846 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-09 14:59:39,849 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-09 14:59:39,850 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.09 02:59:36" (1/3) ... [2019-09-09 14:59:39,851 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b0e93f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 02:59:39, skipping insertion in model container [2019-09-09 14:59:39,851 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 02:59:37" (2/3) ... [2019-09-09 14:59:39,852 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b0e93f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 02:59:39, skipping insertion in model container [2019-09-09 14:59:39,852 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 02:59:39" (3/3) ... [2019-09-09 14:59:39,862 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem11_label08.c [2019-09-09 14:59:39,875 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-09 14:59:39,887 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-09 14:59:39,906 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-09 14:59:39,943 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-09 14:59:39,943 INFO L378 AbstractCegarLoop]: Hoare is false [2019-09-09 14:59:39,944 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-09 14:59:39,944 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-09 14:59:39,944 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-09 14:59:39,944 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-09 14:59:39,944 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-09 14:59:39,945 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-09 14:59:39,971 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states. [2019-09-09 14:59:39,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-09-09 14:59:39,981 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 14:59:39,982 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-09 14:59:39,985 INFO L418 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 14:59:39,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 14:59:39,991 INFO L82 PathProgramCache]: Analyzing trace with hash -2103178606, now seen corresponding path program 1 times [2019-09-09 14:59:39,993 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 14:59:40,038 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 14:59:40,038 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 14:59:40,038 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 14:59:40,038 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 14:59:40,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 14:59:40,266 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 14:59:40,268 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 14:59:40,269 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-09 14:59:40,269 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 14:59:40,275 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-09 14:59:40,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-09 14:59:40,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-09 14:59:40,293 INFO L87 Difference]: Start difference. First operand 292 states. Second operand 3 states. [2019-09-09 14:59:41,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 14:59:41,819 INFO L93 Difference]: Finished difference Result 493 states and 793 transitions. [2019-09-09 14:59:41,819 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-09 14:59:41,821 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2019-09-09 14:59:41,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 14:59:41,856 INFO L225 Difference]: With dead ends: 493 [2019-09-09 14:59:41,856 INFO L226 Difference]: Without dead ends: 425 [2019-09-09 14:59:41,859 INFO L628 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 [2019-09-09 14:59:41,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 425 states. [2019-09-09 14:59:41,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 425 to 420. [2019-09-09 14:59:41,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 420 states. [2019-09-09 14:59:41,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 420 states to 420 states and 666 transitions. [2019-09-09 14:59:41,956 INFO L78 Accepts]: Start accepts. Automaton has 420 states and 666 transitions. Word has length 21 [2019-09-09 14:59:41,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 14:59:41,957 INFO L475 AbstractCegarLoop]: Abstraction has 420 states and 666 transitions. [2019-09-09 14:59:41,957 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-09 14:59:41,957 INFO L276 IsEmpty]: Start isEmpty. Operand 420 states and 666 transitions. [2019-09-09 14:59:41,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2019-09-09 14:59:41,961 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 14:59:41,962 INFO L399 BasicCegarLoop]: trace histogram [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] [2019-09-09 14:59:41,962 INFO L418 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 14:59:41,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 14:59:41,962 INFO L82 PathProgramCache]: Analyzing trace with hash 744139854, now seen corresponding path program 1 times [2019-09-09 14:59:41,963 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 14:59:41,964 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 14:59:41,964 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 14:59:41,964 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 14:59:41,964 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 14:59:42,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 14:59:42,240 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 14:59:42,241 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 14:59:42,241 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-09-09 14:59:42,241 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 14:59:42,244 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-09 14:59:42,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-09 14:59:42,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-09-09 14:59:42,245 INFO L87 Difference]: Start difference. First operand 420 states and 666 transitions. Second operand 6 states. [2019-09-09 14:59:45,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 14:59:45,063 INFO L93 Difference]: Finished difference Result 1251 states and 1867 transitions. [2019-09-09 14:59:45,064 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-09-09 14:59:45,064 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 91 [2019-09-09 14:59:45,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 14:59:45,075 INFO L225 Difference]: With dead ends: 1251 [2019-09-09 14:59:45,075 INFO L226 Difference]: Without dead ends: 1251 [2019-09-09 14:59:45,076 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2019-09-09 14:59:45,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1251 states. [2019-09-09 14:59:45,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1251 to 1217. [2019-09-09 14:59:45,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1217 states. [2019-09-09 14:59:45,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1217 states to 1217 states and 1740 transitions. [2019-09-09 14:59:45,150 INFO L78 Accepts]: Start accepts. Automaton has 1217 states and 1740 transitions. Word has length 91 [2019-09-09 14:59:45,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 14:59:45,150 INFO L475 AbstractCegarLoop]: Abstraction has 1217 states and 1740 transitions. [2019-09-09 14:59:45,151 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-09 14:59:45,151 INFO L276 IsEmpty]: Start isEmpty. Operand 1217 states and 1740 transitions. [2019-09-09 14:59:45,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2019-09-09 14:59:45,155 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 14:59:45,155 INFO L399 BasicCegarLoop]: trace histogram [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] [2019-09-09 14:59:45,155 INFO L418 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 14:59:45,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 14:59:45,156 INFO L82 PathProgramCache]: Analyzing trace with hash -2115435326, now seen corresponding path program 1 times [2019-09-09 14:59:45,156 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 14:59:45,157 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 14:59:45,157 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 14:59:45,157 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 14:59:45,158 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 14:59:45,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 14:59:45,283 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 14:59:45,284 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 14:59:45,284 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-09-09 14:59:45,284 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 14:59:45,285 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-09 14:59:45,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-09 14:59:45,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-09-09 14:59:45,286 INFO L87 Difference]: Start difference. First operand 1217 states and 1740 transitions. Second operand 6 states. [2019-09-09 14:59:47,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 14:59:47,102 INFO L93 Difference]: Finished difference Result 2237 states and 3084 transitions. [2019-09-09 14:59:47,103 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-09 14:59:47,103 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 101 [2019-09-09 14:59:47,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 14:59:47,125 INFO L225 Difference]: With dead ends: 2237 [2019-09-09 14:59:47,126 INFO L226 Difference]: Without dead ends: 2237 [2019-09-09 14:59:47,126 INFO L628 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 [2019-09-09 14:59:47,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2237 states. [2019-09-09 14:59:47,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2237 to 2212. [2019-09-09 14:59:47,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2212 states. [2019-09-09 14:59:47,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2212 states to 2212 states and 3012 transitions. [2019-09-09 14:59:47,236 INFO L78 Accepts]: Start accepts. Automaton has 2212 states and 3012 transitions. Word has length 101 [2019-09-09 14:59:47,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 14:59:47,246 INFO L475 AbstractCegarLoop]: Abstraction has 2212 states and 3012 transitions. [2019-09-09 14:59:47,246 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-09 14:59:47,247 INFO L276 IsEmpty]: Start isEmpty. Operand 2212 states and 3012 transitions. [2019-09-09 14:59:47,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2019-09-09 14:59:47,260 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 14:59:47,261 INFO L399 BasicCegarLoop]: trace histogram [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, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-09 14:59:47,261 INFO L418 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 14:59:47,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 14:59:47,261 INFO L82 PathProgramCache]: Analyzing trace with hash 642183389, now seen corresponding path program 1 times [2019-09-09 14:59:47,262 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 14:59:47,263 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 14:59:47,263 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 14:59:47,263 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 14:59:47,263 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 14:59:47,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 14:59:47,563 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 96 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 14:59:47,564 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-09 14:59:47,564 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-09 14:59:47,565 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 165 with the following transitions: [2019-09-09 14:59:47,568 INFO L207 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [77], [79], [82], [90], [98], [106], [114], [122], [130], [138], [146], [154], [162], [170], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [498], [499], [503], [507], [510], [1084], [1088], [1097], [1101], [1103], [1108], [1109], [1110], [1112], [1113] [2019-09-09 14:59:47,630 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-09 14:59:47,630 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-09 15:00:14,257 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-09-09 15:00:14,259 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. [2019-09-09 15:00:14,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 15:00:14,263 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-09-09 15:00:55,007 INFO L227 lantSequenceWeakener]: Weakened 145 states. On average, predicates are now at 73.32% of their original sizes. [2019-09-09 15:00:55,008 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-09-09 15:00:55,108 INFO L420 sIntCurrentIteration]: We unified 163 AI predicates to 163 [2019-09-09 15:00:55,108 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-09-09 15:00:55,109 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-09 15:00:55,109 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [10] imperfect sequences [6] total 14 [2019-09-09 15:00:55,109 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 15:00:55,110 INFO L454 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-09-09 15:00:55,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-09-09 15:00:55,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2019-09-09 15:00:55,111 INFO L87 Difference]: Start difference. First operand 2212 states and 3012 transitions. Second operand 10 states.