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/Problem14_label22.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-112bae1 [2019-09-09 18:15:16,573 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-09 18:15:16,576 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-09 18:15:16,588 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-09-09 18:15:16,588 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-09-09 18:15:16,589 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-09-09 18:15:16,591 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-09-09 18:15:16,592 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-09-09 18:15:16,594 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-09-09 18:15:16,595 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-09-09 18:15:16,596 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-09-09 18:15:16,597 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-09-09 18:15:16,597 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-09 18:15:16,598 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-09 18:15:16,599 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-09 18:15:16,600 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-09 18:15:16,601 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-09 18:15:16,602 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-09 18:15:16,603 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-09 18:15:16,605 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-09 18:15:16,607 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-09 18:15:16,608 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-09 18:15:16,609 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-09 18:15:16,610 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-09 18:15:16,612 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-09-09 18:15:16,615 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-09-09 18:15:16,615 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-09-09 18:15:16,616 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-09-09 18:15:16,617 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-09-09 18:15:16,618 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-09-09 18:15:16,618 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-09-09 18:15:16,619 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-09-09 18:15:16,619 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-09-09 18:15:16,619 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-09 18:15:16,620 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-09 18:15:16,621 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-09 18:15:16,622 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 18:15:16,637 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-09 18:15:16,637 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-09 18:15:16,637 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-09-09 18:15:16,637 INFO L138 SettingsManager]: * Log level for plugins=info [2019-09-09 18:15:16,638 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-09-09 18:15:16,638 INFO L138 SettingsManager]: * User list type=DISABLED [2019-09-09 18:15:16,638 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-09-09 18:15:16,639 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-09-09 18:15:16,639 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-09-09 18:15:16,639 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-09-09 18:15:16,640 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-09 18:15:16,640 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-09 18:15:16,640 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-09 18:15:16,640 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-09 18:15:16,640 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-09 18:15:16,641 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-09 18:15:16,641 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-09 18:15:16,641 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-09 18:15:16,641 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-09 18:15:16,641 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-09 18:15:16,642 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-09 18:15:16,642 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-09-09 18:15:16,642 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-09 18:15:16,642 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-09 18:15:16,642 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-09 18:15:16,642 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-09 18:15:16,643 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-09-09 18:15:16,643 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-09 18:15:16,643 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-09 18:15:16,643 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-09-09 18:15:16,671 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-09 18:15:16,684 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-09 18:15:16,687 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-09 18:15:16,689 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-09 18:15:16,689 INFO L275 PluginConnector]: CDTParser initialized [2019-09-09 18:15:16,690 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem14_label22.c [2019-09-09 18:15:16,758 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8ef1491e8/71373e88f83a4d169f350af054cffe7d/FLAG851ad1d5d [2019-09-09 18:15:17,381 INFO L306 CDTParser]: Found 1 translation units. [2019-09-09 18:15:17,382 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem14_label22.c [2019-09-09 18:15:17,398 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8ef1491e8/71373e88f83a4d169f350af054cffe7d/FLAG851ad1d5d [2019-09-09 18:15:17,584 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8ef1491e8/71373e88f83a4d169f350af054cffe7d [2019-09-09 18:15:17,595 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-09 18:15:17,597 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-09 18:15:17,598 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-09 18:15:17,598 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-09 18:15:17,602 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-09 18:15:17,603 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 06:15:17" (1/1) ... [2019-09-09 18:15:17,606 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6b6852ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 06:15:17, skipping insertion in model container [2019-09-09 18:15:17,606 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 06:15:17" (1/1) ... [2019-09-09 18:15:17,614 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-09 18:15:17,680 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-09 18:15:18,491 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 18:15:18,502 INFO L188 MainTranslator]: Completed pre-run [2019-09-09 18:15:18,659 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 18:15:18,677 INFO L192 MainTranslator]: Completed translation [2019-09-09 18:15:18,677 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 06:15:18 WrapperNode [2019-09-09 18:15:18,678 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-09 18:15:18,678 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-09 18:15:18,678 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-09 18:15:18,679 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-09 18:15:18,693 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 06:15:18" (1/1) ... [2019-09-09 18:15:18,695 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 06:15:18" (1/1) ... [2019-09-09 18:15:18,733 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 06:15:18" (1/1) ... [2019-09-09 18:15:18,733 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 06:15:18" (1/1) ... [2019-09-09 18:15:18,800 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 06:15:18" (1/1) ... [2019-09-09 18:15:18,822 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 06:15:18" (1/1) ... [2019-09-09 18:15:18,829 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 06:15:18" (1/1) ... [2019-09-09 18:15:18,844 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-09 18:15:18,847 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-09 18:15:18,848 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-09 18:15:18,848 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-09 18:15:18,851 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 06:15:18" (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 18:15:18,931 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-09 18:15:18,931 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-09 18:15:18,931 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-09-09 18:15:18,931 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-09 18:15:18,932 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-09-09 18:15:18,932 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-09 18:15:18,932 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-09 18:15:18,933 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-09-09 18:15:18,933 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-09 18:15:18,933 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-09 18:15:18,934 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-09 18:15:20,428 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-09 18:15:20,429 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-09-09 18:15:20,430 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 06:15:20 BoogieIcfgContainer [2019-09-09 18:15:20,430 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-09 18:15:20,432 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-09 18:15:20,433 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-09 18:15:20,436 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-09 18:15:20,436 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.09 06:15:17" (1/3) ... [2019-09-09 18:15:20,437 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26844328 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 06:15:20, skipping insertion in model container [2019-09-09 18:15:20,437 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 06:15:18" (2/3) ... [2019-09-09 18:15:20,438 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26844328 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 06:15:20, skipping insertion in model container [2019-09-09 18:15:20,438 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 06:15:20" (3/3) ... [2019-09-09 18:15:20,447 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem14_label22.c [2019-09-09 18:15:20,457 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-09 18:15:20,468 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-09 18:15:20,485 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-09 18:15:20,518 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-09 18:15:20,519 INFO L378 AbstractCegarLoop]: Hoare is false [2019-09-09 18:15:20,520 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-09 18:15:20,520 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-09 18:15:20,520 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-09 18:15:20,520 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-09 18:15:20,520 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-09 18:15:20,521 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-09 18:15:20,560 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states. [2019-09-09 18:15:20,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-09-09 18:15:20,572 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 18:15:20,573 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-09 18:15:20,576 INFO L418 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 18:15:20,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 18:15:20,584 INFO L82 PathProgramCache]: Analyzing trace with hash -1330652446, now seen corresponding path program 1 times [2019-09-09 18:15:20,586 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 18:15:20,626 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 18:15:20,627 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 18:15:20,627 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 18:15:20,627 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 18:15:20,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 18:15:20,808 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 18:15:20,811 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 18:15:20,812 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-09 18:15:20,812 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 18:15:20,819 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-09 18:15:20,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-09 18:15:20,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-09 18:15:20,838 INFO L87 Difference]: Start difference. First operand 254 states. Second operand 3 states. [2019-09-09 18:15:22,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 18:15:22,138 INFO L93 Difference]: Finished difference Result 440 states and 711 transitions. [2019-09-09 18:15:22,139 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-09 18:15:22,140 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2019-09-09 18:15:22,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 18:15:22,159 INFO L225 Difference]: With dead ends: 440 [2019-09-09 18:15:22,159 INFO L226 Difference]: Without dead ends: 372 [2019-09-09 18:15:22,161 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 2 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 18:15:22,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 372 states. [2019-09-09 18:15:22,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 372 to 372. [2019-09-09 18:15:22,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 372 states. [2019-09-09 18:15:22,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 372 states to 372 states and 602 transitions. [2019-09-09 18:15:22,296 INFO L78 Accepts]: Start accepts. Automaton has 372 states and 602 transitions. Word has length 19 [2019-09-09 18:15:22,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 18:15:22,297 INFO L475 AbstractCegarLoop]: Abstraction has 372 states and 602 transitions. [2019-09-09 18:15:22,297 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-09 18:15:22,297 INFO L276 IsEmpty]: Start isEmpty. Operand 372 states and 602 transitions. [2019-09-09 18:15:22,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2019-09-09 18:15:22,305 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 18:15:22,306 INFO L399 BasicCegarLoop]: trace histogram [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] [2019-09-09 18:15:22,306 INFO L418 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 18:15:22,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 18:15:22,307 INFO L82 PathProgramCache]: Analyzing trace with hash -630456698, now seen corresponding path program 1 times [2019-09-09 18:15:22,308 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 18:15:22,310 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 18:15:22,310 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 18:15:22,310 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 18:15:22,311 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 18:15:22,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 18:15:22,546 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 18:15:22,546 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 18:15:22,546 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-09-09 18:15:22,547 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 18:15:22,549 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-09 18:15:22,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-09 18:15:22,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-09-09 18:15:22,549 INFO L87 Difference]: Start difference. First operand 372 states and 602 transitions. Second operand 6 states. [2019-09-09 18:15:23,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 18:15:23,929 INFO L93 Difference]: Finished difference Result 570 states and 828 transitions. [2019-09-09 18:15:23,930 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-09 18:15:23,930 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 93 [2019-09-09 18:15:23,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 18:15:23,935 INFO L225 Difference]: With dead ends: 570 [2019-09-09 18:15:23,935 INFO L226 Difference]: Without dead ends: 570 [2019-09-09 18:15:23,936 INFO L628 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 [2019-09-09 18:15:23,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 570 states. [2019-09-09 18:15:23,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 570 to 562. [2019-09-09 18:15:23,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 562 states. [2019-09-09 18:15:23,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 562 states to 562 states and 814 transitions. [2019-09-09 18:15:23,966 INFO L78 Accepts]: Start accepts. Automaton has 562 states and 814 transitions. Word has length 93 [2019-09-09 18:15:23,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 18:15:23,967 INFO L475 AbstractCegarLoop]: Abstraction has 562 states and 814 transitions. [2019-09-09 18:15:23,967 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-09 18:15:23,967 INFO L276 IsEmpty]: Start isEmpty. Operand 562 states and 814 transitions. [2019-09-09 18:15:23,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2019-09-09 18:15:23,969 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 18:15:23,970 INFO L399 BasicCegarLoop]: trace histogram [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] [2019-09-09 18:15:23,970 INFO L418 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 18:15:23,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 18:15:23,970 INFO L82 PathProgramCache]: Analyzing trace with hash -1198133099, now seen corresponding path program 1 times [2019-09-09 18:15:23,971 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 18:15:23,972 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 18:15:23,972 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 18:15:23,972 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 18:15:23,972 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 18:15:24,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 18:15:24,058 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 18:15:24,058 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 18:15:24,059 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-09-09 18:15:24,059 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 18:15:24,059 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-09-09 18:15:24,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-09-09 18:15:24,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-09 18:15:24,060 INFO L87 Difference]: Start difference. First operand 562 states and 814 transitions. Second operand 4 states. [2019-09-09 18:15:25,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 18:15:25,746 INFO L93 Difference]: Finished difference Result 1662 states and 2283 transitions. [2019-09-09 18:15:25,747 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-09 18:15:25,747 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 102 [2019-09-09 18:15:25,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 18:15:25,757 INFO L225 Difference]: With dead ends: 1662 [2019-09-09 18:15:25,757 INFO L226 Difference]: Without dead ends: 1662 [2019-09-09 18:15:25,758 INFO L628 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 [2019-09-09 18:15:25,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1662 states. [2019-09-09 18:15:25,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1662 to 1662. [2019-09-09 18:15:25,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1662 states. [2019-09-09 18:15:25,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1662 states to 1662 states and 2283 transitions. [2019-09-09 18:15:25,818 INFO L78 Accepts]: Start accepts. Automaton has 1662 states and 2283 transitions. Word has length 102 [2019-09-09 18:15:25,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 18:15:25,819 INFO L475 AbstractCegarLoop]: Abstraction has 1662 states and 2283 transitions. [2019-09-09 18:15:25,819 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-09-09 18:15:25,819 INFO L276 IsEmpty]: Start isEmpty. Operand 1662 states and 2283 transitions. [2019-09-09 18:15:25,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2019-09-09 18:15:25,827 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 18:15:25,827 INFO L399 BasicCegarLoop]: trace histogram [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, 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] [2019-09-09 18:15:25,828 INFO L418 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 18:15:25,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 18:15:25,828 INFO L82 PathProgramCache]: Analyzing trace with hash -464863294, now seen corresponding path program 1 times [2019-09-09 18:15:25,828 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 18:15:25,829 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 18:15:25,830 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 18:15:25,830 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 18:15:25,830 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 18:15:25,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 18:15:26,057 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2019-09-09 18:15:26,058 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 18:15:26,058 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-09 18:15:26,058 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 18:15:26,059 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-09 18:15:26,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-09 18:15:26,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-09 18:15:26,060 INFO L87 Difference]: Start difference. First operand 1662 states and 2283 transitions. Second operand 3 states. [2019-09-09 18:15:27,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 18:15:27,060 INFO L93 Difference]: Finished difference Result 2762 states and 3741 transitions. [2019-09-09 18:15:27,060 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-09 18:15:27,061 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 211 [2019-09-09 18:15:27,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 18:15:27,083 INFO L225 Difference]: With dead ends: 2762 [2019-09-09 18:15:27,083 INFO L226 Difference]: Without dead ends: 2762 [2019-09-09 18:15:27,084 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 1 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 18:15:27,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2762 states. [2019-09-09 18:15:27,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2762 to 2762. [2019-09-09 18:15:27,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2762 states. [2019-09-09 18:15:27,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2762 states to 2762 states and 3741 transitions. [2019-09-09 18:15:27,190 INFO L78 Accepts]: Start accepts. Automaton has 2762 states and 3741 transitions. Word has length 211 [2019-09-09 18:15:27,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 18:15:27,192 INFO L475 AbstractCegarLoop]: Abstraction has 2762 states and 3741 transitions. [2019-09-09 18:15:27,192 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-09 18:15:27,192 INFO L276 IsEmpty]: Start isEmpty. Operand 2762 states and 3741 transitions. [2019-09-09 18:15:27,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2019-09-09 18:15:27,200 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 18:15:27,201 INFO L399 BasicCegarLoop]: trace histogram [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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-09 18:15:27,201 INFO L418 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 18:15:27,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 18:15:27,202 INFO L82 PathProgramCache]: Analyzing trace with hash -552997094, now seen corresponding path program 1 times [2019-09-09 18:15:27,202 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 18:15:27,203 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 18:15:27,203 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 18:15:27,203 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 18:15:27,203 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 18:15:27,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 18:15:28,022 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 114 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 18:15:28,023 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-09 18:15:28,023 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-09 18:15:28,024 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 224 with the following transitions: [2019-09-09 18:15:28,026 INFO L207 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [61], [63], [66], [74], [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], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [586], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [655], [659], [663], [666], [948], [952], [961], [965], [967], [972], [973], [974], [976], [977] [2019-09-09 18:15:28,074 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-09 18:15:28,074 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-09 18:15:38,209 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-09-09 18:15:38,212 INFO L272 AbstractInterpreter]: Visited 117 different actions 117 times. Never merged. Never widened. Performed 273 root evaluator evaluations with a maximum evaluation depth of 13. Performed 273 inverse root evaluator evaluations with a maximum inverse evaluation depth of 13. Never found a fixpoint. Largest state had 24 variables. [2019-09-09 18:15:38,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 18:15:38,217 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-09-09 18:15:46,997 INFO L227 lantSequenceWeakener]: Weakened 204 states. On average, predicates are now at 77.44% of their original sizes. [2019-09-09 18:15:46,997 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-09-09 18:15:47,080 INFO L420 sIntCurrentIteration]: We unified 222 AI predicates to 222 [2019-09-09 18:15:47,080 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-09-09 18:15:47,081 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-09 18:15:47,081 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [11] imperfect sequences [11] total 20 [2019-09-09 18:15:47,081 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 18:15:47,082 INFO L454 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-09-09 18:15:47,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-09-09 18:15:47,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2019-09-09 18:15:47,083 INFO L87 Difference]: Start difference. First operand 2762 states and 3741 transitions. Second operand 11 states. [2019-09-09 18:17:25,180 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-09-09 18:20:16,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 18:20:16,299 INFO L93 Difference]: Finished difference Result 2948 states and 3938 transitions. [2019-09-09 18:20:16,299 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-09-09 18:20:16,299 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 223 [2019-09-09 18:20:16,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 18:20:16,315 INFO L225 Difference]: With dead ends: 2948 [2019-09-09 18:20:16,315 INFO L226 Difference]: Without dead ends: 2948 [2019-09-09 18:20:16,316 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 213 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2019-09-09 18:20:16,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2948 states. [2019-09-09 18:20:16,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2948 to 2944. [2019-09-09 18:20:16,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2944 states. [2019-09-09 18:20:16,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2944 states to 2944 states and 3931 transitions. [2019-09-09 18:20:16,388 INFO L78 Accepts]: Start accepts. Automaton has 2944 states and 3931 transitions. Word has length 223 [2019-09-09 18:20:16,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 18:20:16,389 INFO L475 AbstractCegarLoop]: Abstraction has 2944 states and 3931 transitions. [2019-09-09 18:20:16,389 INFO L476 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-09-09 18:20:16,389 INFO L276 IsEmpty]: Start isEmpty. Operand 2944 states and 3931 transitions. [2019-09-09 18:20:16,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 308 [2019-09-09 18:20:16,396 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 18:20:16,397 INFO L399 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2019-09-09 18:20:16,397 INFO L418 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 18:20:16,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 18:20:16,397 INFO L82 PathProgramCache]: Analyzing trace with hash 847439410, now seen corresponding path program 1 times [2019-09-09 18:20:16,398 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 18:20:16,399 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 18:20:16,399 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 18:20:16,399 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 18:20:16,399 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 18:20:16,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 18:20:17,076 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 122 proven. 170 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-09-09 18:20:17,077 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-09 18:20:17,077 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-09 18:20:17,077 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 308 with the following transitions: [2019-09-09 18:20:17,078 INFO L207 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [61], [63], [66], [74], [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], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [554], [555], [559], [563], [567], [571], [575], [579], [583], [586], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [655], [659], [663], [666], [948], [952], [961], [965], [967], [972], [973], [974], [976], [977] [2019-09-09 18:20:17,085 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-09 18:20:17,085 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-09 18:20:28,897 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-09-09 18:20:28,898 INFO L272 AbstractInterpreter]: Visited 121 different actions 237 times. Merged at 4 different actions 5 times. Never widened. Performed 485 root evaluator evaluations with a maximum evaluation depth of 13. Performed 485 inverse root evaluator evaluations with a maximum inverse evaluation depth of 13. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2019-09-09 18:20:28,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 18:20:28,898 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-09-09 18:20:32,978 INFO L227 lantSequenceWeakener]: Weakened 304 states. On average, predicates are now at 77.31% of their original sizes. [2019-09-09 18:20:32,979 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-09-09 18:20:33,052 INFO L420 sIntCurrentIteration]: We unified 306 AI predicates to 306 [2019-09-09 18:20:33,052 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-09-09 18:20:33,052 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-09 18:20:33,053 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [11] imperfect sequences [12] total 21 [2019-09-09 18:20:33,053 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 18:20:33,053 INFO L454 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-09-09 18:20:33,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-09-09 18:20:33,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2019-09-09 18:20:33,054 INFO L87 Difference]: Start difference. First operand 2944 states and 3931 transitions. Second operand 11 states. [2019-09-09 18:21:05,940 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-09-09 18:23:48,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 18:23:48,262 INFO L93 Difference]: Finished difference Result 3160 states and 4157 transitions. [2019-09-09 18:23:48,262 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-09-09 18:23:48,263 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 307 [2019-09-09 18:23:48,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 18:23:48,277 INFO L225 Difference]: With dead ends: 3160 [2019-09-09 18:23:48,278 INFO L226 Difference]: Without dead ends: 3160 [2019-09-09 18:23:48,278 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 313 GetRequests, 297 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2019-09-09 18:23:48,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3160 states. [2019-09-09 18:23:48,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3160 to 2944. [2019-09-09 18:23:48,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2944 states. [2019-09-09 18:23:48,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2944 states to 2944 states and 3930 transitions. [2019-09-09 18:23:48,354 INFO L78 Accepts]: Start accepts. Automaton has 2944 states and 3930 transitions. Word has length 307 [2019-09-09 18:23:48,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 18:23:48,355 INFO L475 AbstractCegarLoop]: Abstraction has 2944 states and 3930 transitions. [2019-09-09 18:23:48,355 INFO L476 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-09-09 18:23:48,355 INFO L276 IsEmpty]: Start isEmpty. Operand 2944 states and 3930 transitions. [2019-09-09 18:23:48,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 334 [2019-09-09 18:23:48,362 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 18:23:48,363 INFO L399 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-09 18:23:48,363 INFO L418 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 18:23:48,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 18:23:48,364 INFO L82 PathProgramCache]: Analyzing trace with hash -510265658, now seen corresponding path program 1 times [2019-09-09 18:23:48,364 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 18:23:48,365 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 18:23:48,365 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 18:23:48,365 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 18:23:48,366 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 18:23:48,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 18:23:49,573 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 47 proven. 279 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-09-09 18:23:49,573 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-09 18:23:49,574 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-09 18:23:49,574 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 334 with the following transitions: [2019-09-09 18:23:49,575 INFO L207 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [61], [63], [66], [74], [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], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [586], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [655], [658], [659], [663], [666], [948], [952], [961], [965], [967], [972], [973], [974], [976], [977] [2019-09-09 18:23:49,579 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-09 18:23:49,579 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-09 18:24:04,071 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-09-09 18:24:04,072 INFO L272 AbstractInterpreter]: Visited 121 different actions 237 times. Merged at 4 different actions 5 times. Never widened. Performed 565 root evaluator evaluations with a maximum evaluation depth of 13. Performed 565 inverse root evaluator evaluations with a maximum inverse evaluation depth of 13. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2019-09-09 18:24:04,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 18:24:04,072 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-09-09 18:24:15,396 INFO L227 lantSequenceWeakener]: Weakened 330 states. On average, predicates are now at 77.3% of their original sizes. [2019-09-09 18:24:15,397 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-09-09 18:24:15,474 INFO L420 sIntCurrentIteration]: We unified 332 AI predicates to 332 [2019-09-09 18:24:15,474 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-09-09 18:24:15,474 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-09 18:24:15,474 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [11] imperfect sequences [15] total 24 [2019-09-09 18:24:15,474 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 18:24:15,475 INFO L454 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-09-09 18:24:15,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-09-09 18:24:15,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2019-09-09 18:24:15,476 INFO L87 Difference]: Start difference. First operand 2944 states and 3930 transitions. Second operand 11 states. [2019-09-09 18:24:56,540 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-09-09 18:26:07,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 18:26:07,217 INFO L93 Difference]: Finished difference Result 3312 states and 4313 transitions. [2019-09-09 18:26:07,217 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-09-09 18:26:07,218 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 333 [2019-09-09 18:26:07,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 18:26:07,231 INFO L225 Difference]: With dead ends: 3312 [2019-09-09 18:26:07,232 INFO L226 Difference]: Without dead ends: 3312 [2019-09-09 18:26:07,232 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 340 GetRequests, 323 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=83, Invalid=259, Unknown=0, NotChecked=0, Total=342 [2019-09-09 18:26:07,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3312 states. [2019-09-09 18:26:07,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3312 to 3310. [2019-09-09 18:26:07,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3310 states. [2019-09-09 18:26:07,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3310 states to 3310 states and 4311 transitions. [2019-09-09 18:26:07,305 INFO L78 Accepts]: Start accepts. Automaton has 3310 states and 4311 transitions. Word has length 333 [2019-09-09 18:26:07,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 18:26:07,306 INFO L475 AbstractCegarLoop]: Abstraction has 3310 states and 4311 transitions. [2019-09-09 18:26:07,306 INFO L476 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-09-09 18:26:07,306 INFO L276 IsEmpty]: Start isEmpty. Operand 3310 states and 4311 transitions. [2019-09-09 18:26:07,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 418 [2019-09-09 18:26:07,316 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 18:26:07,317 INFO L399 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-09 18:26:07,317 INFO L418 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 18:26:07,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 18:26:07,317 INFO L82 PathProgramCache]: Analyzing trace with hash 41255902, now seen corresponding path program 1 times [2019-09-09 18:26:07,318 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 18:26:07,319 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 18:26:07,319 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 18:26:07,319 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 18:26:07,319 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 18:26:07,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 18:26:07,590 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 138 proven. 200 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2019-09-09 18:26:07,591 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-09 18:26:07,591 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-09 18:26:07,591 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 418 with the following transitions: [2019-09-09 18:26:07,592 INFO L207 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [61], [63], [66], [74], [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], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [554], [555], [559], [563], [567], [571], [575], [579], [583], [586], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [655], [658], [659], [663], [666], [948], [952], [961], [965], [967], [972], [973], [974], [976], [977] [2019-09-09 18:26:07,599 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-09 18:26:07,600 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-09 18:26:22,493 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-09-09 18:26:22,494 INFO L272 AbstractInterpreter]: Visited 123 different actions 365 times. Merged at 6 different actions 18 times. Never widened. Performed 666 root evaluator evaluations with a maximum evaluation depth of 13. Performed 666 inverse root evaluator evaluations with a maximum inverse evaluation depth of 13. Found 4 fixpoints after 2 different actions. Largest state had 24 variables. [2019-09-09 18:26:22,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 18:26:22,495 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-09-09 18:26:22,495 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-09 18:26:22,495 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-09 18:26:22,509 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 18:26:22,509 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-09 18:26:22,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 18:26:22,640 INFO L256 TraceCheckSpWp]: Trace formula consists of 675 conjuncts, 4 conjunts are in the unsatisfiable core [2019-09-09 18:26:22,671 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-09 18:26:22,880 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 474 proven. 2 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2019-09-09 18:26:22,880 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-09-09 18:26:23,078 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 138 proven. 200 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2019-09-09 18:26:23,083 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-09-09 18:26:23,084 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 10 [2019-09-09 18:26:23,084 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-09-09 18:26:23,085 INFO L454 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-09-09 18:26:23,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-09-09 18:26:23,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2019-09-09 18:26:23,085 INFO L87 Difference]: Start difference. First operand 3310 states and 4311 transitions. Second operand 9 states. [2019-09-09 18:26:27,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 18:26:27,402 INFO L93 Difference]: Finished difference Result 5008 states and 5801 transitions. [2019-09-09 18:26:27,405 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-09-09 18:26:27,405 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 417 [2019-09-09 18:26:27,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 18:26:27,424 INFO L225 Difference]: With dead ends: 5008 [2019-09-09 18:26:27,424 INFO L226 Difference]: Without dead ends: 4824 [2019-09-09 18:26:27,425 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 882 GetRequests, 850 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=226, Invalid=704, Unknown=0, NotChecked=0, Total=930 [2019-09-09 18:26:27,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4824 states. [2019-09-09 18:26:27,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4824 to 2986. [2019-09-09 18:26:27,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2986 states. [2019-09-09 18:26:27,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2986 states to 2986 states and 3526 transitions. [2019-09-09 18:26:27,505 INFO L78 Accepts]: Start accepts. Automaton has 2986 states and 3526 transitions. Word has length 417 [2019-09-09 18:26:27,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 18:26:27,505 INFO L475 AbstractCegarLoop]: Abstraction has 2986 states and 3526 transitions. [2019-09-09 18:26:27,505 INFO L476 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-09-09 18:26:27,506 INFO L276 IsEmpty]: Start isEmpty. Operand 2986 states and 3526 transitions. [2019-09-09 18:26:27,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 421 [2019-09-09 18:26:27,515 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 18:26:27,516 INFO L399 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 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] [2019-09-09 18:26:27,516 INFO L418 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 18:26:27,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 18:26:27,517 INFO L82 PathProgramCache]: Analyzing trace with hash -1202092951, now seen corresponding path program 1 times [2019-09-09 18:26:27,517 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 18:26:27,518 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 18:26:27,518 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 18:26:27,518 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 18:26:27,518 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 18:26:27,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 18:26:28,228 INFO L134 CoverageAnalysis]: Checked inductivity of 603 backedges. 154 proven. 445 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-09-09 18:26:28,228 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-09 18:26:28,228 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-09 18:26:28,229 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 421 with the following transitions: [2019-09-09 18:26:28,229 INFO L207 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [61], [63], [66], [74], [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], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [566], [567], [571], [575], [579], [583], [586], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [655], [658], [659], [663], [666], [948], [952], [961], [965], [967], [972], [973], [974], [976], [977] [2019-09-09 18:26:28,232 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-09 18:26:28,232 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-09 18:26:52,365 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-09-09 18:26:52,365 INFO L272 AbstractInterpreter]: Visited 122 different actions 475 times. Merged at 6 different actions 17 times. Never widened. Performed 974 root evaluator evaluations with a maximum evaluation depth of 13. Performed 974 inverse root evaluator evaluations with a maximum inverse evaluation depth of 13. Found 4 fixpoints after 1 different actions. Largest state had 24 variables. [2019-09-09 18:26:52,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 18:26:52,365 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-09-09 18:26:59,330 INFO L227 lantSequenceWeakener]: Weakened 417 states. On average, predicates are now at 77.31% of their original sizes. [2019-09-09 18:26:59,330 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-09-09 18:26:59,427 INFO L420 sIntCurrentIteration]: We unified 419 AI predicates to 419 [2019-09-09 18:26:59,427 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-09-09 18:26:59,428 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-09 18:26:59,428 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [11] imperfect sequences [16] total 25 [2019-09-09 18:26:59,428 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 18:26:59,429 INFO L454 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-09-09 18:26:59,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-09-09 18:26:59,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2019-09-09 18:26:59,430 INFO L87 Difference]: Start difference. First operand 2986 states and 3526 transitions. Second operand 11 states. [2019-09-09 18:27:34,016 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation.