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/Problem15_label33.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-112bae1 [2019-09-09 19:16:40,100 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-09 19:16:40,102 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-09 19:16:40,115 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-09-09 19:16:40,124 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-09 19:16:40,125 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-09 19:16:40,126 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-09 19:16:40,127 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-09 19:16:40,128 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-09 19:16:40,129 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-09 19:16:40,131 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-09 19:16:40,133 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-09 19:16:40,134 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-09 19:16:40,136 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-09 19:16:40,138 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-09 19:16:40,139 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-09 19:16:40,143 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-09-09 19:16:40,155 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-09 19:16:40,156 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-09 19:16:40,156 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-09 19:16:40,157 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 19:16:40,172 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-09 19:16:40,172 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-09 19:16:40,173 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-09-09 19:16:40,173 INFO L138 SettingsManager]: * Log level for plugins=info [2019-09-09 19:16:40,174 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-09-09 19:16:40,174 INFO L138 SettingsManager]: * User list type=DISABLED [2019-09-09 19:16:40,174 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-09-09 19:16:40,174 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-09-09 19:16:40,175 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-09-09 19:16:40,175 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-09-09 19:16:40,176 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-09 19:16:40,176 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-09 19:16:40,176 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-09 19:16:40,176 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-09 19:16:40,176 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-09 19:16:40,177 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-09 19:16:40,177 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-09 19:16:40,177 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-09 19:16:40,177 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-09 19:16:40,177 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-09 19:16:40,178 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-09 19:16:40,178 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-09-09 19:16:40,178 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-09 19:16:40,178 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-09 19:16:40,179 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-09 19:16:40,179 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-09 19:16:40,179 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-09-09 19:16:40,179 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-09 19:16:40,179 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-09 19:16:40,180 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-09-09 19:16:40,211 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-09 19:16:40,224 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-09 19:16:40,228 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-09 19:16:40,229 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-09 19:16:40,230 INFO L275 PluginConnector]: CDTParser initialized [2019-09-09 19:16:40,230 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem15_label33.c [2019-09-09 19:16:40,294 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ddeb453ee/7308b5b0a78c417f9374e1e37986aa0e/FLAG94b3f19d9 [2019-09-09 19:16:40,938 INFO L306 CDTParser]: Found 1 translation units. [2019-09-09 19:16:40,939 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem15_label33.c [2019-09-09 19:16:40,974 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ddeb453ee/7308b5b0a78c417f9374e1e37986aa0e/FLAG94b3f19d9 [2019-09-09 19:16:41,127 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ddeb453ee/7308b5b0a78c417f9374e1e37986aa0e [2019-09-09 19:16:41,139 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-09 19:16:41,141 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-09 19:16:41,142 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-09 19:16:41,142 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-09 19:16:41,146 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-09 19:16:41,147 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 07:16:41" (1/1) ... [2019-09-09 19:16:41,150 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@772df1e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 07:16:41, skipping insertion in model container [2019-09-09 19:16:41,150 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 07:16:41" (1/1) ... [2019-09-09 19:16:41,158 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-09 19:16:41,225 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-09 19:16:42,184 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 19:16:42,200 INFO L188 MainTranslator]: Completed pre-run [2019-09-09 19:16:42,583 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 19:16:42,609 INFO L192 MainTranslator]: Completed translation [2019-09-09 19:16:42,610 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 07:16:42 WrapperNode [2019-09-09 19:16:42,610 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-09 19:16:42,611 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-09 19:16:42,612 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-09 19:16:42,612 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-09 19:16:42,631 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 07:16:42" (1/1) ... [2019-09-09 19:16:42,634 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 07:16:42" (1/1) ... [2019-09-09 19:16:42,676 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 07:16:42" (1/1) ... [2019-09-09 19:16:42,679 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 07:16:42" (1/1) ... [2019-09-09 19:16:42,770 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 07:16:42" (1/1) ... [2019-09-09 19:16:42,812 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 07:16:42" (1/1) ... [2019-09-09 19:16:42,836 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 07:16:42" (1/1) ... [2019-09-09 19:16:42,864 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-09 19:16:42,865 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-09 19:16:42,865 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-09 19:16:42,865 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-09 19:16:42,867 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 07:16:42" (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 19:16:42,943 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-09 19:16:42,943 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-09 19:16:42,943 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-09-09 19:16:42,943 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-09-09 19:16:42,944 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-09 19:16:42,944 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-09-09 19:16:42,944 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-09-09 19:16:42,944 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-09 19:16:42,945 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-09 19:16:42,945 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-09-09 19:16:42,945 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-09 19:16:42,946 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-09 19:16:42,946 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-09 19:16:47,732 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-09 19:16:47,733 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-09-09 19:16:47,734 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 07:16:47 BoogieIcfgContainer [2019-09-09 19:16:47,734 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-09 19:16:47,735 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-09 19:16:47,735 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-09 19:16:47,738 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-09 19:16:47,739 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.09 07:16:41" (1/3) ... [2019-09-09 19:16:47,739 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@727862a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 07:16:47, skipping insertion in model container [2019-09-09 19:16:47,740 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 07:16:42" (2/3) ... [2019-09-09 19:16:47,740 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@727862a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 07:16:47, skipping insertion in model container [2019-09-09 19:16:47,740 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 07:16:47" (3/3) ... [2019-09-09 19:16:47,742 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem15_label33.c [2019-09-09 19:16:47,752 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-09 19:16:47,760 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-09 19:16:47,778 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-09 19:16:47,806 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-09 19:16:47,806 INFO L378 AbstractCegarLoop]: Hoare is false [2019-09-09 19:16:47,806 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-09 19:16:47,806 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-09 19:16:47,807 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-09 19:16:47,807 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-09 19:16:47,807 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-09 19:16:47,807 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-09 19:16:47,836 INFO L276 IsEmpty]: Start isEmpty. Operand 437 states. [2019-09-09 19:16:47,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-09-09 19:16:47,848 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 19:16:47,849 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] [2019-09-09 19:16:47,851 INFO L418 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 19:16:47,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 19:16:47,856 INFO L82 PathProgramCache]: Analyzing trace with hash 726540760, now seen corresponding path program 1 times [2019-09-09 19:16:47,859 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 19:16:47,914 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 19:16:47,914 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 19:16:47,915 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 19:16:47,915 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 19:16:47,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 19:16:48,129 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 19:16:48,131 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 19:16:48,132 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-09-09 19:16:48,132 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 19:16:48,137 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-09-09 19:16:48,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-09-09 19:16:48,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-09 19:16:48,155 INFO L87 Difference]: Start difference. First operand 437 states. Second operand 4 states. [2019-09-09 19:16:52,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 19:16:52,374 INFO L93 Difference]: Finished difference Result 1115 states and 1741 transitions. [2019-09-09 19:16:52,374 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-09 19:16:52,376 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 28 [2019-09-09 19:16:52,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 19:16:52,417 INFO L225 Difference]: With dead ends: 1115 [2019-09-09 19:16:52,417 INFO L226 Difference]: Without dead ends: 1028 [2019-09-09 19:16:52,420 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 19:16:52,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1028 states. [2019-09-09 19:16:52,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1028 to 700. [2019-09-09 19:16:52,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 700 states. [2019-09-09 19:16:52,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 700 states to 700 states and 1110 transitions. [2019-09-09 19:16:52,530 INFO L78 Accepts]: Start accepts. Automaton has 700 states and 1110 transitions. Word has length 28 [2019-09-09 19:16:52,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 19:16:52,531 INFO L475 AbstractCegarLoop]: Abstraction has 700 states and 1110 transitions. [2019-09-09 19:16:52,532 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-09-09 19:16:52,532 INFO L276 IsEmpty]: Start isEmpty. Operand 700 states and 1110 transitions. [2019-09-09 19:16:52,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2019-09-09 19:16:52,539 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 19:16:52,540 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:16:52,540 INFO L418 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 19:16:52,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 19:16:52,541 INFO L82 PathProgramCache]: Analyzing trace with hash 1804858835, now seen corresponding path program 1 times [2019-09-09 19:16:52,541 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 19:16:52,543 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 19:16:52,543 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 19:16:52,543 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 19:16:52,544 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 19:16:52,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 19:16:52,770 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 19:16:52,770 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 19:16:52,771 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-09-09 19:16:52,771 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 19:16:52,773 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-09 19:16:52,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-09 19:16:52,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-09-09 19:16:52,773 INFO L87 Difference]: Start difference. First operand 700 states and 1110 transitions. Second operand 5 states. [2019-09-09 19:16:57,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 19:16:57,536 INFO L93 Difference]: Finished difference Result 1363 states and 1890 transitions. [2019-09-09 19:16:57,536 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-09-09 19:16:57,537 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 100 [2019-09-09 19:16:57,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 19:16:57,545 INFO L225 Difference]: With dead ends: 1363 [2019-09-09 19:16:57,545 INFO L226 Difference]: Without dead ends: 1363 [2019-09-09 19:16:57,546 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-09-09 19:16:57,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1363 states. [2019-09-09 19:16:57,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1363 to 1333. [2019-09-09 19:16:57,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1333 states. [2019-09-09 19:16:57,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1333 states to 1333 states and 1846 transitions. [2019-09-09 19:16:57,596 INFO L78 Accepts]: Start accepts. Automaton has 1333 states and 1846 transitions. Word has length 100 [2019-09-09 19:16:57,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 19:16:57,597 INFO L475 AbstractCegarLoop]: Abstraction has 1333 states and 1846 transitions. [2019-09-09 19:16:57,597 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-09 19:16:57,597 INFO L276 IsEmpty]: Start isEmpty. Operand 1333 states and 1846 transitions. [2019-09-09 19:16:57,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2019-09-09 19:16:57,599 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 19:16:57,600 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:16:57,600 INFO L418 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 19:16:57,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 19:16:57,600 INFO L82 PathProgramCache]: Analyzing trace with hash 278762691, now seen corresponding path program 1 times [2019-09-09 19:16:57,601 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 19:16:57,602 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 19:16:57,602 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 19:16:57,602 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 19:16:57,602 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 19:16:57,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 19:16:57,714 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 19:16:57,715 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 19:16:57,715 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-09 19:16:57,715 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 19:16:57,716 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-09 19:16:57,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-09 19:16:57,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-09 19:16:57,716 INFO L87 Difference]: Start difference. First operand 1333 states and 1846 transitions. Second operand 3 states. [2019-09-09 19:16:59,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 19:16:59,950 INFO L93 Difference]: Finished difference Result 2576 states and 3210 transitions. [2019-09-09 19:16:59,951 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-09 19:16:59,951 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 108 [2019-09-09 19:16:59,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 19:16:59,961 INFO L225 Difference]: With dead ends: 2576 [2019-09-09 19:16:59,962 INFO L226 Difference]: Without dead ends: 1952 [2019-09-09 19:16:59,962 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-09 19:16:59,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1952 states. [2019-09-09 19:17:00,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1952 to 1952. [2019-09-09 19:17:00,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1952 states. [2019-09-09 19:17:00,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1952 states to 1952 states and 2412 transitions. [2019-09-09 19:17:00,017 INFO L78 Accepts]: Start accepts. Automaton has 1952 states and 2412 transitions. Word has length 108 [2019-09-09 19:17:00,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 19:17:00,018 INFO L475 AbstractCegarLoop]: Abstraction has 1952 states and 2412 transitions. [2019-09-09 19:17:00,018 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-09 19:17:00,018 INFO L276 IsEmpty]: Start isEmpty. Operand 1952 states and 2412 transitions. [2019-09-09 19:17:00,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2019-09-09 19:17:00,021 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 19:17:00,021 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:17:00,022 INFO L418 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 19:17:00,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 19:17:00,022 INFO L82 PathProgramCache]: Analyzing trace with hash -295431597, now seen corresponding path program 1 times [2019-09-09 19:17:00,022 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 19:17:00,023 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 19:17:00,023 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 19:17:00,024 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 19:17:00,024 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 19:17:00,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 19:17:00,172 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 19:17:00,173 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 19:17:00,173 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-09-09 19:17:00,173 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 19:17:00,175 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-09-09 19:17:00,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-09-09 19:17:00,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-09 19:17:00,176 INFO L87 Difference]: Start difference. First operand 1952 states and 2412 transitions. Second operand 4 states. [2019-09-09 19:17:04,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 19:17:04,812 INFO L93 Difference]: Finished difference Result 5662 states and 6786 transitions. [2019-09-09 19:17:04,812 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-09 19:17:04,813 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 139 [2019-09-09 19:17:04,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 19:17:04,841 INFO L225 Difference]: With dead ends: 5662 [2019-09-09 19:17:04,841 INFO L226 Difference]: Without dead ends: 5662 [2019-09-09 19:17:04,842 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 19:17:04,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5662 states. [2019-09-09 19:17:04,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5662 to 5661. [2019-09-09 19:17:04,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5661 states. [2019-09-09 19:17:05,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5661 states to 5661 states and 6784 transitions. [2019-09-09 19:17:05,051 INFO L78 Accepts]: Start accepts. Automaton has 5661 states and 6784 transitions. Word has length 139 [2019-09-09 19:17:05,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 19:17:05,053 INFO L475 AbstractCegarLoop]: Abstraction has 5661 states and 6784 transitions. [2019-09-09 19:17:05,053 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-09-09 19:17:05,053 INFO L276 IsEmpty]: Start isEmpty. Operand 5661 states and 6784 transitions. [2019-09-09 19:17:05,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2019-09-09 19:17:05,062 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 19:17:05,063 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:17:05,063 INFO L418 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 19:17:05,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 19:17:05,064 INFO L82 PathProgramCache]: Analyzing trace with hash -344480781, now seen corresponding path program 1 times [2019-09-09 19:17:05,064 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 19:17:05,065 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 19:17:05,065 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 19:17:05,065 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 19:17:05,066 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 19:17:05,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 19:17:05,383 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-09-09 19:17:05,383 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-09 19:17:05,383 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-09 19:17:05,384 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 222 with the following transitions: [2019-09-09 19:17:05,388 INFO L207 CegarAbsIntRunner]: [0], [1], [74], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [205], [207], [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], [498], [506], [514], [522], [530], [538], [546], [554], [562], [567], [571], [582], [586], [590], [594], [598], [602], [606], [610], [614], [618], [622], [626], [630], [641], [645], [649], [653], [657], [668], [672], [676], [680], [684], [688], [692], [696], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [751], [755], [759], [763], [767], [771], [775], [779], [783], [787], [798], [809], [813], [824], [835], [839], [850], [854], [865], [869], [873], [877], [881], [885], [896], [900], [904], [908], [912], [916], [920], [924], [935], [939], [943], [947], [951], [955], [959], [963], [967], [971], [975], [979], [983], [987], [991], [1002], [1006], [1010], [1014], [1018], [1029], [1033], [1037], [1041], [1045], [1049], [1053], [1057], [1061], [1072], [1076], [1080], [1084], [1088], [1092], [1096], [1100], [1104], [1108], [1112], [1116], [1120], [1124], [1128], [1132], [1136], [1140], [1144], [1148], [1152], [1156], [1160], [1164], [1167], [1635], [1639], [1648], [1652], [1654], [1661], [1662], [1663], [1665], [1666] [2019-09-09 19:17:05,455 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-09 19:17:05,455 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-09 19:17:15,636 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-09-09 19:17:15,638 INFO L272 AbstractInterpreter]: Visited 197 different actions 197 times. Never merged. Never widened. Performed 433 root evaluator evaluations with a maximum evaluation depth of 14. Performed 433 inverse root evaluator evaluations with a maximum inverse evaluation depth of 14. Never found a fixpoint. Largest state had 24 variables. [2019-09-09 19:17:15,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 19:17:15,642 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-09-09 19:17:22,205 INFO L227 lantSequenceWeakener]: Weakened 207 states. On average, predicates are now at 77.64% of their original sizes. [2019-09-09 19:17:22,205 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-09-09 19:17:22,299 INFO L420 sIntCurrentIteration]: We unified 220 AI predicates to 220 [2019-09-09 19:17:22,300 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-09-09 19:17:22,301 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-09 19:17:22,301 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [11] imperfect sequences [5] total 14 [2019-09-09 19:17:22,301 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 19:17:22,302 INFO L454 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-09-09 19:17:22,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-09-09 19:17:22,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2019-09-09 19:17:22,303 INFO L87 Difference]: Start difference. First operand 5661 states and 6784 transitions. Second operand 11 states. [2019-09-09 19:18:20,307 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-09-09 19:28:11,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 19:28:11,325 INFO L93 Difference]: Finished difference Result 5972 states and 7103 transitions. [2019-09-09 19:28:11,326 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-09-09 19:28:11,326 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 221 [2019-09-09 19:28:11,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 19:28:11,351 INFO L225 Difference]: With dead ends: 5972 [2019-09-09 19:28:11,351 INFO L226 Difference]: Without dead ends: 5972 [2019-09-09 19:28:11,352 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 211 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2019-09-09 19:28:11,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5972 states. [2019-09-09 19:28:11,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5972 to 5968. [2019-09-09 19:28:11,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5968 states. [2019-09-09 19:28:11,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5968 states to 5968 states and 7096 transitions. [2019-09-09 19:28:11,461 INFO L78 Accepts]: Start accepts. Automaton has 5968 states and 7096 transitions. Word has length 221 [2019-09-09 19:28:11,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 19:28:11,462 INFO L475 AbstractCegarLoop]: Abstraction has 5968 states and 7096 transitions. [2019-09-09 19:28:11,462 INFO L476 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-09-09 19:28:11,462 INFO L276 IsEmpty]: Start isEmpty. Operand 5968 states and 7096 transitions. [2019-09-09 19:28:11,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 459 [2019-09-09 19:28:11,472 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 19:28:11,473 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-09-09 19:28:11,473 INFO L418 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 19:28:11,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 19:28:11,474 INFO L82 PathProgramCache]: Analyzing trace with hash 43777822, now seen corresponding path program 1 times [2019-09-09 19:28:11,474 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 19:28:11,475 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 19:28:11,475 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 19:28:11,475 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 19:28:11,475 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 19:28:11,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 19:28:11,846 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2019-09-09 19:28:11,846 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 19:28:11,846 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-09-09 19:28:11,847 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 19:28:11,847 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-09-09 19:28:11,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-09-09 19:28:11,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-09 19:28:11,848 INFO L87 Difference]: Start difference. First operand 5968 states and 7096 transitions. Second operand 4 states. [2019-09-09 19:28:14,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 19:28:14,907 INFO L93 Difference]: Finished difference Result 12126 states and 14377 transitions. [2019-09-09 19:28:14,910 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-09 19:28:14,910 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 458 [2019-09-09 19:28:14,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 19:28:14,969 INFO L225 Difference]: With dead ends: 12126 [2019-09-09 19:28:14,970 INFO L226 Difference]: Without dead ends: 12126 [2019-09-09 19:28:14,971 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 19:28:14,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12126 states. [2019-09-09 19:28:15,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12126 to 10898. [2019-09-09 19:28:15,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10898 states. [2019-09-09 19:28:15,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10898 states to 10898 states and 13033 transitions. [2019-09-09 19:28:15,214 INFO L78 Accepts]: Start accepts. Automaton has 10898 states and 13033 transitions. Word has length 458 [2019-09-09 19:28:15,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 19:28:15,224 INFO L475 AbstractCegarLoop]: Abstraction has 10898 states and 13033 transitions. [2019-09-09 19:28:15,224 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-09-09 19:28:15,224 INFO L276 IsEmpty]: Start isEmpty. Operand 10898 states and 13033 transitions. [2019-09-09 19:28:15,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 461 [2019-09-09 19:28:15,238 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 19:28:15,238 INFO L399 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:28:15,239 INFO L418 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 19:28:15,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 19:28:15,239 INFO L82 PathProgramCache]: Analyzing trace with hash -2134139605, now seen corresponding path program 1 times [2019-09-09 19:28:15,239 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 19:28:15,241 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 19:28:15,241 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 19:28:15,241 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 19:28:15,242 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 19:28:15,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 19:28:15,991 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 145 proven. 189 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-09-09 19:28:15,991 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-09 19:28:15,992 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-09 19:28:15,992 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 461 with the following transitions: [2019-09-09 19:28:15,993 INFO L207 CegarAbsIntRunner]: [0], [1], [74], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [205], [207], [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], [498], [506], [514], [522], [530], [538], [546], [554], [562], [567], [571], [582], [586], [590], [594], [598], [602], [606], [610], [614], [617], [618], [622], [626], [630], [641], [645], [649], [653], [657], [668], [672], [676], [680], [684], [688], [692], [696], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [751], [755], [759], [763], [767], [771], [775], [778], [779], [783], [787], [798], [809], [813], [824], [835], [839], [850], [854], [865], [869], [873], [877], [881], [885], [896], [900], [904], [908], [912], [916], [920], [924], [935], [939], [943], [947], [951], [955], [959], [963], [967], [971], [975], [979], [983], [987], [991], [1002], [1006], [1010], [1014], [1018], [1029], [1033], [1037], [1041], [1045], [1049], [1053], [1057], [1061], [1072], [1076], [1080], [1084], [1088], [1092], [1096], [1100], [1104], [1108], [1112], [1116], [1120], [1124], [1128], [1132], [1136], [1140], [1144], [1148], [1152], [1156], [1160], [1164], [1168], [1172], [1176], [1180], [1191], [1202], [1206], [1210], [1214], [1218], [1229], [1233], [1237], [1241], [1245], [1256], [1260], [1264], [1268], [1272], [1276], [1280], [1284], [1288], [1292], [1296], [1300], [1304], [1308], [1312], [1316], [1320], [1324], [1328], [1332], [1336], [1340], [1344], [1348], [1352], [1356], [1367], [1371], [1375], [1378], [1635], [1639], [1648], [1652], [1654], [1661], [1662], [1663], [1665], [1666] [2019-09-09 19:28:16,003 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-09 19:28:16,004 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-09 19:28:26,654 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-09-09 19:28:31,521 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-09-09 19:28:31,523 INFO L272 AbstractInterpreter]: Visited 246 different actions 487 times. Merged at 4 different actions 5 times. Never widened. Performed 876 root evaluator evaluations with a maximum evaluation depth of 14. Performed 876 inverse root evaluator evaluations with a maximum inverse evaluation depth of 14. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2019-09-09 19:28:31,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 19:28:31,523 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-09-09 19:28:36,579 INFO L227 lantSequenceWeakener]: Weakened 457 states. On average, predicates are now at 77.38% of their original sizes. [2019-09-09 19:28:36,580 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-09-09 19:28:36,681 INFO L420 sIntCurrentIteration]: We unified 459 AI predicates to 459 [2019-09-09 19:28:36,682 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-09-09 19:28:36,682 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-09 19:28:36,682 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [12] imperfect sequences [11] total 21 [2019-09-09 19:28:36,683 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 19:28:36,684 INFO L454 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-09-09 19:28:36,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-09-09 19:28:36,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2019-09-09 19:28:36,684 INFO L87 Difference]: Start difference. First operand 10898 states and 13033 transitions. Second operand 12 states.