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_label37.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-112bae1 [2019-09-09 14:30:20,006 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-09 14:30:20,008 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-09 14:30:20,020 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-09-09 14:30:20,055 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/svcomp-Reach-32bit-Automizer_Default+AIv2_INT.epf [2019-09-09 14:30:20,073 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-09 14:30:20,073 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-09 14:30:20,073 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-09-09 14:30:20,074 INFO L138 SettingsManager]: * Log level for plugins=info [2019-09-09 14:30:20,074 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-09-09 14:30:20,074 INFO L138 SettingsManager]: * User list type=DISABLED [2019-09-09 14:30:20,075 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-09-09 14:30:20,075 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-09-09 14:30:20,075 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-09-09 14:30:20,075 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-09-09 14:30:20,076 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-09 14:30:20,076 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-09 14:30:20,076 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-09 14:30:20,077 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-09 14:30:20,077 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-09 14:30:20,077 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-09 14:30:20,077 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-09 14:30:20,077 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-09 14:30:20,077 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-09 14:30:20,078 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-09 14:30:20,078 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-09 14:30:20,078 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-09-09 14:30:20,078 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-09 14:30:20,078 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-09 14:30:20,079 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-09 14:30:20,079 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-09 14:30:20,079 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-09-09 14:30:20,079 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-09 14:30:20,080 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-09 14:30:20,080 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-09-09 14:30:20,108 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-09 14:30:20,122 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-09 14:30:20,126 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-09 14:30:20,127 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-09 14:30:20,128 INFO L275 PluginConnector]: CDTParser initialized [2019-09-09 14:30:20,128 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem10_label37.c [2019-09-09 14:30:20,196 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f1c9effe8/2142ceab963b4b1daa5a382eb98c47d8/FLAG384198377 [2019-09-09 14:30:20,781 INFO L306 CDTParser]: Found 1 translation units. [2019-09-09 14:30:20,782 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem10_label37.c [2019-09-09 14:30:20,794 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f1c9effe8/2142ceab963b4b1daa5a382eb98c47d8/FLAG384198377 [2019-09-09 14:30:21,073 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f1c9effe8/2142ceab963b4b1daa5a382eb98c47d8 [2019-09-09 14:30:21,083 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-09 14:30:21,084 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-09 14:30:21,085 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-09 14:30:21,085 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-09 14:30:21,089 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-09 14:30:21,090 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 02:30:21" (1/1) ... [2019-09-09 14:30:21,093 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@279a106e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 02:30:21, skipping insertion in model container [2019-09-09 14:30:21,093 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 02:30:21" (1/1) ... [2019-09-09 14:30:21,100 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-09 14:30:21,161 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-09 14:30:21,691 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 14:30:21,702 INFO L188 MainTranslator]: Completed pre-run [2019-09-09 14:30:21,845 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 14:30:21,874 INFO L192 MainTranslator]: Completed translation [2019-09-09 14:30:21,875 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 02:30:21 WrapperNode [2019-09-09 14:30:21,875 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-09 14:30:21,876 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-09 14:30:21,876 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-09 14:30:21,876 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-09 14:30:21,890 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 02:30:21" (1/1) ... [2019-09-09 14:30:21,892 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 02:30:21" (1/1) ... [2019-09-09 14:30:21,921 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 02:30:21" (1/1) ... [2019-09-09 14:30:21,924 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 02:30:21" (1/1) ... [2019-09-09 14:30:21,969 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 02:30:21" (1/1) ... [2019-09-09 14:30:21,984 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 02:30:21" (1/1) ... [2019-09-09 14:30:21,999 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 02:30:21" (1/1) ... [2019-09-09 14:30:22,013 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-09 14:30:22,016 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-09 14:30:22,016 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-09 14:30:22,016 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-09 14:30:22,017 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 02:30:21" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-09 14:30:22,092 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-09 14:30:22,092 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-09 14:30:22,092 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-09-09 14:30:22,093 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-09 14:30:22,093 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-09-09 14:30:22,093 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-09 14:30:22,093 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-09 14:30:22,093 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-09-09 14:30:22,094 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-09 14:30:22,094 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-09 14:30:22,094 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-09 14:30:23,372 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-09 14:30:23,372 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-09-09 14:30:23,374 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 02:30:23 BoogieIcfgContainer [2019-09-09 14:30:23,374 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-09 14:30:23,375 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-09 14:30:23,375 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-09 14:30:23,378 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-09 14:30:23,378 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.09 02:30:21" (1/3) ... [2019-09-09 14:30:23,379 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48564f19 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 02:30:23, skipping insertion in model container [2019-09-09 14:30:23,380 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 02:30:21" (2/3) ... [2019-09-09 14:30:23,380 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48564f19 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 02:30:23, skipping insertion in model container [2019-09-09 14:30:23,380 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 02:30:23" (3/3) ... [2019-09-09 14:30:23,382 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem10_label37.c [2019-09-09 14:30:23,401 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-09 14:30:23,408 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-09 14:30:23,423 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-09 14:30:23,450 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-09 14:30:23,450 INFO L378 AbstractCegarLoop]: Hoare is false [2019-09-09 14:30:23,450 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-09 14:30:23,450 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-09 14:30:23,451 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-09 14:30:23,451 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-09 14:30:23,451 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-09 14:30:23,451 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-09 14:30:23,473 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states. [2019-09-09 14:30:23,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2019-09-09 14:30:23,487 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 14:30:23,488 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-09 14:30:23,490 INFO L418 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 14:30:23,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 14:30:23,497 INFO L82 PathProgramCache]: Analyzing trace with hash -1887592417, now seen corresponding path program 1 times [2019-09-09 14:30:23,499 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 14:30:23,539 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 14:30:23,539 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 14:30:23,540 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 14:30:23,540 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 14:30:23,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 14:30:23,847 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 14:30:23,850 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 14:30:23,850 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-09-09 14:30:23,850 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 14:30:23,858 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-09-09 14:30:23,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-09-09 14:30:23,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-09 14:30:23,877 INFO L87 Difference]: Start difference. First operand 215 states. Second operand 4 states. [2019-09-09 14:30:25,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 14:30:25,343 INFO L93 Difference]: Finished difference Result 524 states and 762 transitions. [2019-09-09 14:30:25,343 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-09 14:30:25,345 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 60 [2019-09-09 14:30:25,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 14:30:25,364 INFO L225 Difference]: With dead ends: 524 [2019-09-09 14:30:25,364 INFO L226 Difference]: Without dead ends: 437 [2019-09-09 14:30:25,366 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-09 14:30:25,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 437 states. [2019-09-09 14:30:25,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 437 to 294. [2019-09-09 14:30:25,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 294 states. [2019-09-09 14:30:25,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 426 transitions. [2019-09-09 14:30:25,436 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 426 transitions. Word has length 60 [2019-09-09 14:30:25,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 14:30:25,437 INFO L475 AbstractCegarLoop]: Abstraction has 294 states and 426 transitions. [2019-09-09 14:30:25,437 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-09-09 14:30:25,437 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 426 transitions. [2019-09-09 14:30:25,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2019-09-09 14:30:25,444 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 14:30:25,445 INFO L399 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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 14:30:25,445 INFO L418 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 14:30:25,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 14:30:25,445 INFO L82 PathProgramCache]: Analyzing trace with hash 597106810, now seen corresponding path program 1 times [2019-09-09 14:30:25,446 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 14:30:25,447 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 14:30:25,447 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 14:30:25,447 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 14:30:25,447 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 14:30:25,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 14:30:25,672 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 53 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 14:30:25,673 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 14:30:25,673 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-09-09 14:30:25,673 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 14:30:25,675 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-09 14:30:25,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-09 14:30:25,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-09-09 14:30:25,677 INFO L87 Difference]: Start difference. First operand 294 states and 426 transitions. Second operand 6 states. [2019-09-09 14:30:26,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 14:30:26,668 INFO L93 Difference]: Finished difference Result 602 states and 886 transitions. [2019-09-09 14:30:26,670 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-09 14:30:26,670 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 134 [2019-09-09 14:30:26,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 14:30:26,677 INFO L225 Difference]: With dead ends: 602 [2019-09-09 14:30:26,677 INFO L226 Difference]: Without dead ends: 602 [2019-09-09 14:30:26,678 INFO L628 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 [2019-09-09 14:30:26,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 602 states. [2019-09-09 14:30:26,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 602 to 590. [2019-09-09 14:30:26,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 590 states. [2019-09-09 14:30:26,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 590 states to 590 states and 856 transitions. [2019-09-09 14:30:26,726 INFO L78 Accepts]: Start accepts. Automaton has 590 states and 856 transitions. Word has length 134 [2019-09-09 14:30:26,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 14:30:26,727 INFO L475 AbstractCegarLoop]: Abstraction has 590 states and 856 transitions. [2019-09-09 14:30:26,727 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-09 14:30:26,728 INFO L276 IsEmpty]: Start isEmpty. Operand 590 states and 856 transitions. [2019-09-09 14:30:26,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2019-09-09 14:30:26,732 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 14:30:26,732 INFO L399 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-09-09 14:30:26,732 INFO L418 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 14:30:26,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 14:30:26,733 INFO L82 PathProgramCache]: Analyzing trace with hash 1573383766, now seen corresponding path program 1 times [2019-09-09 14:30:26,733 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 14:30:26,734 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 14:30:26,734 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 14:30:26,734 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 14:30:26,735 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 14:30:26,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 14:30:26,935 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 53 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 14:30:26,935 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 14:30:26,936 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-09-09 14:30:26,936 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 14:30:26,936 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-09 14:30:26,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-09 14:30:26,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-09-09 14:30:26,937 INFO L87 Difference]: Start difference. First operand 590 states and 856 transitions. Second operand 6 states. [2019-09-09 14:30:27,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 14:30:27,828 INFO L93 Difference]: Finished difference Result 900 states and 1265 transitions. [2019-09-09 14:30:27,828 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-09 14:30:27,829 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 136 [2019-09-09 14:30:27,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 14:30:27,842 INFO L225 Difference]: With dead ends: 900 [2019-09-09 14:30:27,843 INFO L226 Difference]: Without dead ends: 900 [2019-09-09 14:30:27,843 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 14:30:27,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 900 states. [2019-09-09 14:30:27,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 900 to 888. [2019-09-09 14:30:27,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 888 states. [2019-09-09 14:30:27,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 888 states to 888 states and 1227 transitions. [2019-09-09 14:30:27,915 INFO L78 Accepts]: Start accepts. Automaton has 888 states and 1227 transitions. Word has length 136 [2019-09-09 14:30:27,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 14:30:27,916 INFO L475 AbstractCegarLoop]: Abstraction has 888 states and 1227 transitions. [2019-09-09 14:30:27,916 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-09 14:30:27,916 INFO L276 IsEmpty]: Start isEmpty. Operand 888 states and 1227 transitions. [2019-09-09 14:30:27,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2019-09-09 14:30:27,923 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 14:30:27,923 INFO L399 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-09-09 14:30:27,923 INFO L418 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 14:30:27,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 14:30:27,924 INFO L82 PathProgramCache]: Analyzing trace with hash -1984546499, now seen corresponding path program 1 times [2019-09-09 14:30:27,926 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 14:30:27,927 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 14:30:27,927 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 14:30:27,928 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 14:30:27,928 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 14:30:27,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 14:30:28,064 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 53 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 14:30:28,065 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 14:30:28,065 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-09-09 14:30:28,065 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 14:30:28,066 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-09-09 14:30:28,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-09-09 14:30:28,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-09 14:30:28,067 INFO L87 Difference]: Start difference. First operand 888 states and 1227 transitions. Second operand 4 states. [2019-09-09 14:30:29,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 14:30:29,086 INFO L93 Difference]: Finished difference Result 1176 states and 1521 transitions. [2019-09-09 14:30:29,087 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-09 14:30:29,087 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 139 [2019-09-09 14:30:29,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 14:30:29,094 INFO L225 Difference]: With dead ends: 1176 [2019-09-09 14:30:29,094 INFO L226 Difference]: Without dead ends: 1176 [2019-09-09 14:30:29,095 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 14:30:29,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1176 states. [2019-09-09 14:30:29,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1176 to 1176. [2019-09-09 14:30:29,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1176 states. [2019-09-09 14:30:29,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1176 states to 1176 states and 1521 transitions. [2019-09-09 14:30:29,131 INFO L78 Accepts]: Start accepts. Automaton has 1176 states and 1521 transitions. Word has length 139 [2019-09-09 14:30:29,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 14:30:29,132 INFO L475 AbstractCegarLoop]: Abstraction has 1176 states and 1521 transitions. [2019-09-09 14:30:29,132 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-09-09 14:30:29,132 INFO L276 IsEmpty]: Start isEmpty. Operand 1176 states and 1521 transitions. [2019-09-09 14:30:29,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2019-09-09 14:30:29,135 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 14:30:29,136 INFO L399 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-09-09 14:30:29,136 INFO L418 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 14:30:29,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 14:30:29,137 INFO L82 PathProgramCache]: Analyzing trace with hash -1888530915, now seen corresponding path program 1 times [2019-09-09 14:30:29,137 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 14:30:29,138 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 14:30:29,138 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 14:30:29,138 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 14:30:29,138 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 14:30:29,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 14:30:29,277 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 53 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 14:30:29,277 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 14:30:29,277 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-09-09 14:30:29,278 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 14:30:29,278 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-09 14:30:29,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-09 14:30:29,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-09-09 14:30:29,280 INFO L87 Difference]: Start difference. First operand 1176 states and 1521 transitions. Second operand 6 states. [2019-09-09 14:30:30,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 14:30:30,144 INFO L93 Difference]: Finished difference Result 1675 states and 2159 transitions. [2019-09-09 14:30:30,145 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-09 14:30:30,145 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 155 [2019-09-09 14:30:30,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 14:30:30,154 INFO L225 Difference]: With dead ends: 1675 [2019-09-09 14:30:30,155 INFO L226 Difference]: Without dead ends: 1675 [2019-09-09 14:30:30,155 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 14:30:30,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1675 states. [2019-09-09 14:30:30,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1675 to 1635. [2019-09-09 14:30:30,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1635 states. [2019-09-09 14:30:30,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1635 states to 1635 states and 2017 transitions. [2019-09-09 14:30:30,202 INFO L78 Accepts]: Start accepts. Automaton has 1635 states and 2017 transitions. Word has length 155 [2019-09-09 14:30:30,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 14:30:30,202 INFO L475 AbstractCegarLoop]: Abstraction has 1635 states and 2017 transitions. [2019-09-09 14:30:30,202 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-09 14:30:30,203 INFO L276 IsEmpty]: Start isEmpty. Operand 1635 states and 2017 transitions. [2019-09-09 14:30:30,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2019-09-09 14:30:30,208 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 14:30:30,209 INFO L399 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-09 14:30:30,209 INFO L418 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 14:30:30,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 14:30:30,209 INFO L82 PathProgramCache]: Analyzing trace with hash 1010882157, now seen corresponding path program 1 times [2019-09-09 14:30:30,209 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 14:30:30,210 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 14:30:30,211 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 14:30:30,211 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 14:30:30,211 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 14:30:30,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 14:30:30,429 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2019-09-09 14:30:30,430 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-09 14:30:30,430 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-09 14:30:30,431 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 229 with the following transitions: [2019-09-09 14:30:30,433 INFO L207 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [289], [297], [305], [313], [321], [329], [337], [345], [353], [361], [369], [377], [385], [389], [391], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [538], [539], [543], [547], [551], [555], [559], [563], [567], [570], [792], [796], [805], [809], [811], [816], [817], [818], [820], [821] [2019-09-09 14:30:30,480 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-09 14:30:30,481 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-09 14:30:45,747 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-09-09 14:30:45,749 INFO L272 AbstractInterpreter]: Visited 93 different actions 93 times. Never merged. Never widened. Performed 130 root evaluator evaluations with a maximum evaluation depth of 16. Performed 130 inverse root evaluator evaluations with a maximum inverse evaluation depth of 16. Never found a fixpoint. Largest state had 24 variables. [2019-09-09 14:30:45,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 14:30:45,753 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-09-09 14:31:05,651 INFO L227 lantSequenceWeakener]: Weakened 219 states. On average, predicates are now at 73.47% of their original sizes. [2019-09-09 14:31:05,651 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-09-09 14:31:05,682 INFO L420 sIntCurrentIteration]: We unified 227 AI predicates to 227 [2019-09-09 14:31:05,682 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-09-09 14:31:05,683 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-09 14:31:05,683 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [4] total 9 [2019-09-09 14:31:05,684 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 14:31:05,684 INFO L454 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-09-09 14:31:05,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-09-09 14:31:05,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2019-09-09 14:31:05,685 INFO L87 Difference]: Start difference. First operand 1635 states and 2017 transitions. Second operand 7 states. [2019-09-09 14:31:09,934 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-09-09 14:34:00,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 14:34:00,021 INFO L93 Difference]: Finished difference Result 1779 states and 2169 transitions. [2019-09-09 14:34:00,021 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-09 14:34:00,022 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 228 [2019-09-09 14:34:00,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 14:34:00,032 INFO L225 Difference]: With dead ends: 1779 [2019-09-09 14:34:00,032 INFO L226 Difference]: Without dead ends: 1779 [2019-09-09 14:34:00,033 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 222 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2019-09-09 14:34:00,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1779 states. [2019-09-09 14:34:00,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1779 to 1778. [2019-09-09 14:34:00,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1778 states. [2019-09-09 14:34:00,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1778 states to 1778 states and 2168 transitions. [2019-09-09 14:34:00,083 INFO L78 Accepts]: Start accepts. Automaton has 1778 states and 2168 transitions. Word has length 228 [2019-09-09 14:34:00,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 14:34:00,083 INFO L475 AbstractCegarLoop]: Abstraction has 1778 states and 2168 transitions. [2019-09-09 14:34:00,091 INFO L476 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-09-09 14:34:00,092 INFO L276 IsEmpty]: Start isEmpty. Operand 1778 states and 2168 transitions. [2019-09-09 14:34:00,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 261 [2019-09-09 14:34:00,099 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 14:34:00,100 INFO L399 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-09 14:34:00,100 INFO L418 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 14:34:00,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 14:34:00,101 INFO L82 PathProgramCache]: Analyzing trace with hash 1371500715, now seen corresponding path program 1 times [2019-09-09 14:34:00,101 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 14:34:00,102 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 14:34:00,102 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 14:34:00,102 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 14:34:00,103 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 14:34:00,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 14:34:00,340 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 107 proven. 5 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2019-09-09 14:34:00,340 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-09 14:34:00,340 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-09 14:34:00,340 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 261 with the following transitions: [2019-09-09 14:34:00,341 INFO L207 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [289], [297], [305], [313], [321], [329], [337], [345], [353], [361], [369], [377], [385], [389], [391], [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], [702], [792], [796], [805], [809], [811], [816], [817], [818], [820], [821] [2019-09-09 14:34:00,347 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-09 14:34:00,347 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-09 14:34:10,265 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-09-09 14:35:05,210 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-09-09 14:35:05,212 INFO L272 AbstractInterpreter]: Visited 129 different actions 251 times. Merged at 3 different actions 3 times. Never widened. Performed 385 root evaluator evaluations with a maximum evaluation depth of 16. Performed 385 inverse root evaluator evaluations with a maximum inverse evaluation depth of 16. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2019-09-09 14:35:05,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 14:35:05,212 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-09-09 14:35:42,017 INFO L227 lantSequenceWeakener]: Weakened 257 states. On average, predicates are now at 73.4% of their original sizes. [2019-09-09 14:35:42,018 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-09-09 14:35:42,102 INFO L420 sIntCurrentIteration]: We unified 259 AI predicates to 259 [2019-09-09 14:35:42,103 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-09-09 14:35:42,103 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-09 14:35:42,103 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [11] imperfect sequences [8] total 17 [2019-09-09 14:35:42,103 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 14:35:42,104 INFO L454 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-09-09 14:35:42,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-09-09 14:35:42,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2019-09-09 14:35:42,105 INFO L87 Difference]: Start difference. First operand 1778 states and 2168 transitions. Second operand 11 states. [2019-09-09 14:38:39,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 14:38:39,655 INFO L93 Difference]: Finished difference Result 1945 states and 2336 transitions. [2019-09-09 14:38:39,655 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-09-09 14:38:39,655 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 260 [2019-09-09 14:38:39,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 14:38:39,663 INFO L225 Difference]: With dead ends: 1945 [2019-09-09 14:38:39,664 INFO L226 Difference]: Without dead ends: 1779 [2019-09-09 14:38:39,664 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 250 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 14:38:39,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1779 states. [2019-09-09 14:38:39,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1779 to 1778. [2019-09-09 14:38:39,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1778 states. [2019-09-09 14:38:39,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1778 states to 1778 states and 2167 transitions. [2019-09-09 14:38:39,704 INFO L78 Accepts]: Start accepts. Automaton has 1778 states and 2167 transitions. Word has length 260 [2019-09-09 14:38:39,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 14:38:39,704 INFO L475 AbstractCegarLoop]: Abstraction has 1778 states and 2167 transitions. [2019-09-09 14:38:39,704 INFO L476 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-09-09 14:38:39,705 INFO L276 IsEmpty]: Start isEmpty. Operand 1778 states and 2167 transitions. [2019-09-09 14:38:39,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 283 [2019-09-09 14:38:39,712 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 14:38:39,712 INFO L399 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-09 14:38:39,712 INFO L418 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 14:38:39,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 14:38:39,713 INFO L82 PathProgramCache]: Analyzing trace with hash -1770057567, now seen corresponding path program 1 times [2019-09-09 14:38:39,713 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 14:38:39,714 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 14:38:39,714 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 14:38:39,714 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 14:38:39,714 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 14:38:39,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 14:38:40,485 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 118 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 14:38:40,486 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-09 14:38:40,486 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-09 14:38:40,486 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 283 with the following transitions: [2019-09-09 14:38:40,487 INFO L207 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [289], [297], [305], [313], [321], [329], [337], [345], [353], [361], [369], [377], [385], [389], [391], [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], [570], [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], [754], [792], [796], [805], [809], [811], [816], [817], [818], [820], [821] [2019-09-09 14:38:40,491 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-09 14:38:40,491 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-09 14:40:32,417 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-09-09 14:40:32,417 INFO L272 AbstractInterpreter]: Visited 142 different actions 278 times. Merged at 4 different actions 4 times. Never widened. Performed 488 root evaluator evaluations with a maximum evaluation depth of 16. Performed 488 inverse root evaluator evaluations with a maximum inverse evaluation depth of 16. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2019-09-09 14:40:32,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 14:40:32,418 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-09-09 14:41:50,750 INFO L227 lantSequenceWeakener]: Weakened 279 states. On average, predicates are now at 73.35% of their original sizes. [2019-09-09 14:41:50,751 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-09-09 14:41:50,895 INFO L420 sIntCurrentIteration]: We unified 281 AI predicates to 281 [2019-09-09 14:41:50,895 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-09-09 14:41:50,895 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-09 14:41:50,896 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [15] imperfect sequences [14] total 27 [2019-09-09 14:41:50,896 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 14:41:50,896 INFO L454 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-09-09 14:41:50,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-09-09 14:41:50,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2019-09-09 14:41:50,897 INFO L87 Difference]: Start difference. First operand 1778 states and 2167 transitions. Second operand 15 states. [2019-09-09 14:41:59,331 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation.