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/Problem10_label49.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-673a906-m [2019-10-02 19:14:01,619 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-02 19:14:01,622 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-02 19:14:01,634 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-10-02 19:14:01,682 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 [2019-10-02 19:14:01,705 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-02 19:14:01,706 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-02 19:14:01,706 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-10-02 19:14:01,707 INFO L138 SettingsManager]: * Log level for plugins=info [2019-10-02 19:14:01,707 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-10-02 19:14:01,708 INFO L138 SettingsManager]: * User list type=DISABLED [2019-10-02 19:14:01,708 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-10-02 19:14:01,708 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-10-02 19:14:01,708 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-10-02 19:14:01,708 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-10-02 19:14:01,710 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-02 19:14:01,710 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-02 19:14:01,711 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-02 19:14:01,711 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-02 19:14:01,711 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-02 19:14:01,711 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-02 19:14:01,712 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-02 19:14:01,712 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-02 19:14:01,712 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-02 19:14:01,712 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-02 19:14:01,713 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-02 19:14:01,713 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-10-02 19:14:01,713 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-02 19:14:01,713 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-02 19:14:01,714 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-02 19:14:01,714 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-02 19:14:01,714 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-10-02 19:14:01,714 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-02 19:14:01,714 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-02 19:14:01,715 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-10-02 19:14:01,760 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-02 19:14:01,771 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-02 19:14:01,774 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-02 19:14:01,775 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-02 19:14:01,775 INFO L275 PluginConnector]: CDTParser initialized [2019-10-02 19:14:01,776 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem10_label49.c [2019-10-02 19:14:01,848 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/94417ba21/d5d9d0ea804a43f0877b18cfe6500696/FLAGc62631463 [2019-10-02 19:14:02,420 INFO L306 CDTParser]: Found 1 translation units. [2019-10-02 19:14:02,421 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem10_label49.c [2019-10-02 19:14:02,439 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/94417ba21/d5d9d0ea804a43f0877b18cfe6500696/FLAGc62631463 [2019-10-02 19:14:02,691 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/94417ba21/d5d9d0ea804a43f0877b18cfe6500696 [2019-10-02 19:14:02,702 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-02 19:14:02,704 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-02 19:14:02,705 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-02 19:14:02,705 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-02 19:14:02,709 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-02 19:14:02,710 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.10 07:14:02" (1/1) ... [2019-10-02 19:14:02,713 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1ed86ba3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 07:14:02, skipping insertion in model container [2019-10-02 19:14:02,713 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.10 07:14:02" (1/1) ... [2019-10-02 19:14:02,721 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-02 19:14:02,769 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-02 19:14:03,316 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-02 19:14:03,320 INFO L188 MainTranslator]: Completed pre-run [2019-10-02 19:14:03,460 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-02 19:14:03,474 INFO L192 MainTranslator]: Completed translation [2019-10-02 19:14:03,474 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 07:14:03 WrapperNode [2019-10-02 19:14:03,475 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-02 19:14:03,475 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-02 19:14:03,476 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-02 19:14:03,476 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-02 19:14:03,490 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 07:14:03" (1/1) ... [2019-10-02 19:14:03,490 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 07:14:03" (1/1) ... [2019-10-02 19:14:03,508 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 07:14:03" (1/1) ... [2019-10-02 19:14:03,509 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 07:14:03" (1/1) ... [2019-10-02 19:14:03,551 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 07:14:03" (1/1) ... [2019-10-02 19:14:03,566 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 07:14:03" (1/1) ... [2019-10-02 19:14:03,571 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 07:14:03" (1/1) ... [2019-10-02 19:14:03,581 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-02 19:14:03,581 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-02 19:14:03,581 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-02 19:14:03,582 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-02 19:14:03,583 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 07:14:03" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-02 19:14:03,661 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-02 19:14:03,661 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-02 19:14:03,661 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-02 19:14:03,662 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-02 19:14:03,662 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-02 19:14:03,662 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-02 19:14:03,662 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-02 19:14:03,662 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-02 19:14:03,663 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-02 19:14:03,663 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-02 19:14:03,663 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-02 19:14:05,182 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-02 19:14:05,183 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-02 19:14:05,184 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.10 07:14:05 BoogieIcfgContainer [2019-10-02 19:14:05,185 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-02 19:14:05,186 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-02 19:14:05,186 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-02 19:14:05,189 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-02 19:14:05,190 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.10 07:14:02" (1/3) ... [2019-10-02 19:14:05,191 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76b8fce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.10 07:14:05, skipping insertion in model container [2019-10-02 19:14:05,191 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 07:14:03" (2/3) ... [2019-10-02 19:14:05,191 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76b8fce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.10 07:14:05, skipping insertion in model container [2019-10-02 19:14:05,191 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.10 07:14:05" (3/3) ... [2019-10-02 19:14:05,193 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem10_label49.c [2019-10-02 19:14:05,204 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-02 19:14:05,214 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-02 19:14:05,231 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-02 19:14:05,255 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-10-02 19:14:05,256 INFO L378 AbstractCegarLoop]: Hoare is false [2019-10-02 19:14:05,256 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-02 19:14:05,256 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-02 19:14:05,257 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-02 19:14:05,257 INFO L382 AbstractCegarLoop]: Difference is false [2019-10-02 19:14:05,257 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-02 19:14:05,257 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-02 19:14:05,277 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states. [2019-10-02 19:14:05,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-10-02 19:14:05,288 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 19:14:05,289 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 19:14:05,291 INFO L418 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 19:14:05,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 19:14:05,296 INFO L82 PathProgramCache]: Analyzing trace with hash -1605828193, now seen corresponding path program 1 times [2019-10-02 19:14:05,298 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 19:14:05,346 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 19:14:05,346 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 19:14:05,347 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 19:14:05,347 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 19:14:05,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 19:14:05,591 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 19:14:05,595 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 19:14:05,595 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-02 19:14:05,596 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 19:14:05,603 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-02 19:14:05,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-02 19:14:05,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-02 19:14:05,622 INFO L87 Difference]: Start difference. First operand 215 states. Second operand 3 states. [2019-10-02 19:14:06,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 19:14:06,688 INFO L93 Difference]: Finished difference Result 362 states and 555 transitions. [2019-10-02 19:14:06,689 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-02 19:14:06,690 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 28 [2019-10-02 19:14:06,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 19:14:06,707 INFO L225 Difference]: With dead ends: 362 [2019-10-02 19:14:06,708 INFO L226 Difference]: Without dead ends: 294 [2019-10-02 19:14:06,710 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-02 19:14:06,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2019-10-02 19:14:06,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 294. [2019-10-02 19:14:06,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 294 states. [2019-10-02 19:14:06,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 446 transitions. [2019-10-02 19:14:06,786 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 446 transitions. Word has length 28 [2019-10-02 19:14:06,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 19:14:06,786 INFO L475 AbstractCegarLoop]: Abstraction has 294 states and 446 transitions. [2019-10-02 19:14:06,787 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-02 19:14:06,787 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 446 transitions. [2019-10-02 19:14:06,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2019-10-02 19:14:06,792 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 19:14:06,792 INFO L411 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 19:14:06,792 INFO L418 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 19:14:06,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 19:14:06,793 INFO L82 PathProgramCache]: Analyzing trace with hash -351220503, now seen corresponding path program 1 times [2019-10-02 19:14:06,793 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 19:14:06,795 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 19:14:06,795 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 19:14:06,795 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 19:14:06,795 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 19:14:06,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 19:14:07,008 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 19:14:07,008 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 19:14:07,008 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-02 19:14:07,009 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 19:14:07,011 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-02 19:14:07,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-02 19:14:07,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-02 19:14:07,012 INFO L87 Difference]: Start difference. First operand 294 states and 446 transitions. Second operand 6 states. [2019-10-02 19:14:08,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 19:14:08,049 INFO L93 Difference]: Finished difference Result 453 states and 640 transitions. [2019-10-02 19:14:08,049 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-02 19:14:08,050 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 101 [2019-10-02 19:14:08,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 19:14:08,054 INFO L225 Difference]: With dead ends: 453 [2019-10-02 19:14:08,054 INFO L226 Difference]: Without dead ends: 453 [2019-10-02 19:14:08,055 INFO L640 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 [2019-10-02 19:14:08,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453 states. [2019-10-02 19:14:08,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453 to 445. [2019-10-02 19:14:08,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 445 states. [2019-10-02 19:14:08,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 445 states to 445 states and 626 transitions. [2019-10-02 19:14:08,086 INFO L78 Accepts]: Start accepts. Automaton has 445 states and 626 transitions. Word has length 101 [2019-10-02 19:14:08,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 19:14:08,087 INFO L475 AbstractCegarLoop]: Abstraction has 445 states and 626 transitions. [2019-10-02 19:14:08,087 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-02 19:14:08,087 INFO L276 IsEmpty]: Start isEmpty. Operand 445 states and 626 transitions. [2019-10-02 19:14:08,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2019-10-02 19:14:08,091 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 19:14:08,091 INFO L411 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 19:14:08,092 INFO L418 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 19:14:08,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 19:14:08,092 INFO L82 PathProgramCache]: Analyzing trace with hash 788107453, now seen corresponding path program 1 times [2019-10-02 19:14:08,093 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 19:14:08,094 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 19:14:08,094 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 19:14:08,094 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 19:14:08,095 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 19:14:08,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 19:14:08,249 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 19:14:08,250 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 19:14:08,250 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-02 19:14:08,250 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 19:14:08,252 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-02 19:14:08,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-02 19:14:08,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-02 19:14:08,253 INFO L87 Difference]: Start difference. First operand 445 states and 626 transitions. Second operand 4 states. [2019-10-02 19:14:09,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 19:14:09,377 INFO L93 Difference]: Finished difference Result 1172 states and 1554 transitions. [2019-10-02 19:14:09,377 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-02 19:14:09,378 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 107 [2019-10-02 19:14:09,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 19:14:09,386 INFO L225 Difference]: With dead ends: 1172 [2019-10-02 19:14:09,386 INFO L226 Difference]: Without dead ends: 1172 [2019-10-02 19:14:09,387 INFO L640 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 [2019-10-02 19:14:09,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1172 states. [2019-10-02 19:14:09,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1172 to 1172. [2019-10-02 19:14:09,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1172 states. [2019-10-02 19:14:09,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1172 states to 1172 states and 1554 transitions. [2019-10-02 19:14:09,442 INFO L78 Accepts]: Start accepts. Automaton has 1172 states and 1554 transitions. Word has length 107 [2019-10-02 19:14:09,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 19:14:09,442 INFO L475 AbstractCegarLoop]: Abstraction has 1172 states and 1554 transitions. [2019-10-02 19:14:09,443 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-02 19:14:09,443 INFO L276 IsEmpty]: Start isEmpty. Operand 1172 states and 1554 transitions. [2019-10-02 19:14:09,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2019-10-02 19:14:09,449 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 19:14:09,449 INFO L411 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 19:14:09,449 INFO L418 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 19:14:09,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 19:14:09,450 INFO L82 PathProgramCache]: Analyzing trace with hash 58557854, now seen corresponding path program 1 times [2019-10-02 19:14:09,450 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 19:14:09,452 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 19:14:09,452 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 19:14:09,452 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 19:14:09,452 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 19:14:09,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 19:14:09,729 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 19:14:09,729 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 19:14:09,729 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-02 19:14:09,729 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 19:14:09,732 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-02 19:14:09,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-02 19:14:09,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-02 19:14:09,733 INFO L87 Difference]: Start difference. First operand 1172 states and 1554 transitions. Second operand 6 states. [2019-10-02 19:14:10,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 19:14:10,620 INFO L93 Difference]: Finished difference Result 1206 states and 1531 transitions. [2019-10-02 19:14:10,624 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-02 19:14:10,624 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 164 [2019-10-02 19:14:10,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 19:14:10,635 INFO L225 Difference]: With dead ends: 1206 [2019-10-02 19:14:10,635 INFO L226 Difference]: Without dead ends: 1206 [2019-10-02 19:14:10,636 INFO L640 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 [2019-10-02 19:14:10,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1206 states. [2019-10-02 19:14:10,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1206 to 1051. [2019-10-02 19:14:10,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1051 states. [2019-10-02 19:14:10,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1051 states to 1051 states and 1334 transitions. [2019-10-02 19:14:10,691 INFO L78 Accepts]: Start accepts. Automaton has 1051 states and 1334 transitions. Word has length 164 [2019-10-02 19:14:10,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 19:14:10,693 INFO L475 AbstractCegarLoop]: Abstraction has 1051 states and 1334 transitions. [2019-10-02 19:14:10,693 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-02 19:14:10,694 INFO L276 IsEmpty]: Start isEmpty. Operand 1051 states and 1334 transitions. [2019-10-02 19:14:10,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2019-10-02 19:14:10,701 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 19:14:10,701 INFO L411 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 19:14:10,702 INFO L418 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 19:14:10,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 19:14:10,702 INFO L82 PathProgramCache]: Analyzing trace with hash 1560592178, now seen corresponding path program 1 times [2019-10-02 19:14:10,703 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 19:14:10,707 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 19:14:10,707 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 19:14:10,708 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 19:14:10,708 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 19:14:10,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 19:14:10,995 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 19:14:10,996 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 19:14:10,996 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-02 19:14:10,996 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 19:14:10,997 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-02 19:14:10,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-02 19:14:10,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-02 19:14:10,998 INFO L87 Difference]: Start difference. First operand 1051 states and 1334 transitions. Second operand 6 states. [2019-10-02 19:14:11,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 19:14:11,882 INFO L93 Difference]: Finished difference Result 1355 states and 1688 transitions. [2019-10-02 19:14:11,883 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-02 19:14:11,883 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 170 [2019-10-02 19:14:11,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 19:14:11,893 INFO L225 Difference]: With dead ends: 1355 [2019-10-02 19:14:11,893 INFO L226 Difference]: Without dead ends: 1355 [2019-10-02 19:14:11,894 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-10-02 19:14:11,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1355 states. [2019-10-02 19:14:11,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1355 to 1200. [2019-10-02 19:14:11,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1200 states. [2019-10-02 19:14:11,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1200 states to 1200 states and 1479 transitions. [2019-10-02 19:14:11,938 INFO L78 Accepts]: Start accepts. Automaton has 1200 states and 1479 transitions. Word has length 170 [2019-10-02 19:14:11,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 19:14:11,939 INFO L475 AbstractCegarLoop]: Abstraction has 1200 states and 1479 transitions. [2019-10-02 19:14:11,939 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-02 19:14:11,939 INFO L276 IsEmpty]: Start isEmpty. Operand 1200 states and 1479 transitions. [2019-10-02 19:14:11,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2019-10-02 19:14:11,967 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 19:14:11,968 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-02 19:14:11,968 INFO L418 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 19:14:11,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 19:14:11,969 INFO L82 PathProgramCache]: Analyzing trace with hash -226216260, now seen corresponding path program 1 times [2019-10-02 19:14:11,969 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 19:14:11,970 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 19:14:11,970 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 19:14:11,970 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 19:14:11,971 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 19:14:12,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 19:14:12,258 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 43 proven. 5 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2019-10-02 19:14:12,259 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-02 19:14:12,259 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-10-02 19:14:12,260 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 244 with the following transitions: [2019-10-02 19:14:12,263 INFO L207 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [133], [135], [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], [534], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [655], [659], [663], [667], [671], [675], [679], [683], [687], [691], [695], [699], [703], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [751], [755], [759], [762], [792], [796], [805], [809], [811], [816], [817], [818], [820], [821] [2019-10-02 19:14:12,329 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-02 19:14:12,330 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-02 19:14:24,747 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-10-02 19:15:50,769 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-10-02 19:15:50,773 INFO L272 AbstractInterpreter]: Visited 144 different actions 281 times. Merged at 3 different actions 3 times. Never widened. Performed 415 root evaluator evaluations with a maximum evaluation depth of 16. Performed 415 inverse root evaluator evaluations with a maximum inverse evaluation depth of 16. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2019-10-02 19:15:50,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 19:15:50,778 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-10-02 19:16:37,450 INFO L227 lantSequenceWeakener]: Weakened 240 states. On average, predicates are now at 72.84% of their original sizes. [2019-10-02 19:16:37,451 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-10-02 19:16:37,562 INFO L420 sIntCurrentIteration]: We unified 242 AI predicates to 242 [2019-10-02 19:16:37,563 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-10-02 19:16:37,564 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-02 19:16:37,564 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [12] imperfect sequences [8] total 18 [2019-10-02 19:16:37,564 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 19:16:37,565 INFO L454 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-02 19:16:37,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-02 19:16:37,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2019-10-02 19:16:37,566 INFO L87 Difference]: Start difference. First operand 1200 states and 1479 transitions. Second operand 12 states. [2019-10-02 19:23:04,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 19:23:04,363 INFO L93 Difference]: Finished difference Result 1510 states and 1798 transitions. [2019-10-02 19:23:04,363 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-10-02 19:23:04,363 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 243 [2019-10-02 19:23:04,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 19:23:04,371 INFO L225 Difference]: With dead ends: 1510 [2019-10-02 19:23:04,371 INFO L226 Difference]: Without dead ends: 1344 [2019-10-02 19:23:04,372 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 232 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=289, Unknown=0, NotChecked=0, Total=380 [2019-10-02 19:23:04,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1344 states. [2019-10-02 19:23:04,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1344 to 1343. [2019-10-02 19:23:04,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1343 states. [2019-10-02 19:23:04,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1343 states to 1343 states and 1629 transitions. [2019-10-02 19:23:04,413 INFO L78 Accepts]: Start accepts. Automaton has 1343 states and 1629 transitions. Word has length 243 [2019-10-02 19:23:04,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 19:23:04,415 INFO L475 AbstractCegarLoop]: Abstraction has 1343 states and 1629 transitions. [2019-10-02 19:23:04,424 INFO L476 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-02 19:23:04,424 INFO L276 IsEmpty]: Start isEmpty. Operand 1343 states and 1629 transitions. [2019-10-02 19:23:04,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 280 [2019-10-02 19:23:04,430 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 19:23:04,431 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-02 19:23:04,432 INFO L418 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 19:23:04,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 19:23:04,432 INFO L82 PathProgramCache]: Analyzing trace with hash -2088165964, now seen corresponding path program 1 times [2019-10-02 19:23:04,432 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 19:23:04,434 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 19:23:04,434 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 19:23:04,435 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 19:23:04,435 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 19:23:04,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 19:23:04,707 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 6 proven. 42 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2019-10-02 19:23:04,707 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-02 19:23:04,708 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-10-02 19:23:04,708 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 280 with the following transitions: [2019-10-02 19:23:04,709 INFO L207 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [133], [135], [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], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [655], [659], [663], [667], [671], [675], [678], [679], [683], [687], [691], [695], [699], [703], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [751], [755], [759], [762], [792], [796], [805], [809], [811], [816], [817], [818], [820], [821] [2019-10-02 19:23:04,727 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-02 19:23:04,727 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-02 19:23:38,573 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-10-02 19:25:23,053 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-10-02 19:25:23,054 INFO L272 AbstractInterpreter]: Visited 144 different actions 282 times. Merged at 4 different actions 4 times. Never widened. Performed 527 root evaluator evaluations with a maximum evaluation depth of 16. Performed 527 inverse root evaluator evaluations with a maximum inverse evaluation depth of 16. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2019-10-02 19:25:23,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 19:25:23,054 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-10-02 19:27:18,484 INFO L227 lantSequenceWeakener]: Weakened 276 states. On average, predicates are now at 72.83% of their original sizes. [2019-10-02 19:27:18,484 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-10-02 19:27:18,614 INFO L420 sIntCurrentIteration]: We unified 278 AI predicates to 278 [2019-10-02 19:27:18,614 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-10-02 19:27:18,614 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-02 19:27:18,615 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [13] imperfect sequences [9] total 20 [2019-10-02 19:27:18,615 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 19:27:18,615 INFO L454 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-10-02 19:27:18,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-10-02 19:27:18,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2019-10-02 19:27:18,616 INFO L87 Difference]: Start difference. First operand 1343 states and 1629 transitions. Second operand 13 states.