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_label00.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-112bae1 [2019-09-09 18:44:21,083 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-09 18:44:21,085 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-09 18:44:21,098 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-09-09 18:44:21,108 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-09 18:44:21,109 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-09 18:44:21,110 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-09 18:44:21,112 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-09 18:44:21,113 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-09 18:44:21,114 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-09 18:44:21,116 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-09 18:44:21,118 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-09 18:44:21,120 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-09 18:44:21,121 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-09 18:44:21,122 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-09 18:44:21,123 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-09 18:44:21,126 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-09-09 18:44:21,134 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-09 18:44:21,135 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-09 18:44:21,136 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-09 18:44:21,137 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/svcomp-Reach-32bit-Automizer_Default+AIv2_INT.epf [2019-09-09 18:44:21,153 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-09 18:44:21,154 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-09 18:44:21,154 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-09-09 18:44:21,154 INFO L138 SettingsManager]: * Log level for plugins=info [2019-09-09 18:44:21,155 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-09-09 18:44:21,155 INFO L138 SettingsManager]: * User list type=DISABLED [2019-09-09 18:44:21,155 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-09-09 18:44:21,156 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-09-09 18:44:21,156 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-09-09 18:44:21,156 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-09-09 18:44:21,157 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-09 18:44:21,157 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-09 18:44:21,157 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-09 18:44:21,158 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-09 18:44:21,158 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-09 18:44:21,158 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-09 18:44:21,158 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-09 18:44:21,158 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-09 18:44:21,159 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-09 18:44:21,159 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-09 18:44:21,159 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-09 18:44:21,159 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-09-09 18:44:21,160 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-09 18:44:21,160 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-09 18:44:21,160 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-09 18:44:21,160 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-09 18:44:21,160 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-09-09 18:44:21,161 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-09 18:44:21,161 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-09 18:44:21,161 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-09-09 18:44:21,191 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-09 18:44:21,208 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-09 18:44:21,212 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-09 18:44:21,213 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-09 18:44:21,213 INFO L275 PluginConnector]: CDTParser initialized [2019-09-09 18:44:21,214 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem15_label00.c [2019-09-09 18:44:21,279 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7a790f412/47ad794c5a0c4b5d9c6eeea58244d5d8/FLAGa9d9bc2e2 [2019-09-09 18:44:21,957 INFO L306 CDTParser]: Found 1 translation units. [2019-09-09 18:44:21,958 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem15_label00.c [2019-09-09 18:44:21,979 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7a790f412/47ad794c5a0c4b5d9c6eeea58244d5d8/FLAGa9d9bc2e2 [2019-09-09 18:44:22,101 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7a790f412/47ad794c5a0c4b5d9c6eeea58244d5d8 [2019-09-09 18:44:22,111 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-09 18:44:22,113 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-09 18:44:22,114 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-09 18:44:22,114 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-09 18:44:22,118 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-09 18:44:22,119 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 06:44:22" (1/1) ... [2019-09-09 18:44:22,122 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@194b4a45 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 06:44:22, skipping insertion in model container [2019-09-09 18:44:22,122 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 06:44:22" (1/1) ... [2019-09-09 18:44:22,130 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-09 18:44:22,215 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-09 18:44:23,132 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 18:44:23,140 INFO L188 MainTranslator]: Completed pre-run [2019-09-09 18:44:23,852 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 18:44:23,874 INFO L192 MainTranslator]: Completed translation [2019-09-09 18:44:23,875 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 06:44:23 WrapperNode [2019-09-09 18:44:23,876 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-09 18:44:23,877 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-09 18:44:23,877 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-09 18:44:23,877 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-09 18:44:23,893 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 06:44:23" (1/1) ... [2019-09-09 18:44:23,895 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 06:44:23" (1/1) ... [2019-09-09 18:44:23,951 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 06:44:23" (1/1) ... [2019-09-09 18:44:23,952 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 06:44:23" (1/1) ... [2019-09-09 18:44:24,042 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 06:44:23" (1/1) ... [2019-09-09 18:44:24,074 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 06:44:23" (1/1) ... [2019-09-09 18:44:24,096 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 06:44:23" (1/1) ... [2019-09-09 18:44:24,117 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-09 18:44:24,118 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-09 18:44:24,118 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-09 18:44:24,119 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-09 18:44:24,120 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 06:44:23" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-09 18:44:24,194 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-09 18:44:24,195 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-09 18:44:24,195 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-09-09 18:44:24,195 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-09-09 18:44:24,195 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-09 18:44:24,196 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-09-09 18:44:24,196 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-09-09 18:44:24,196 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-09 18:44:24,196 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-09 18:44:24,197 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-09-09 18:44:24,197 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-09 18:44:24,197 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-09 18:44:24,198 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-09 18:44:27,224 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-09 18:44:27,225 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-09-09 18:44:27,226 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 06:44:27 BoogieIcfgContainer [2019-09-09 18:44:27,227 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-09 18:44:27,228 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-09 18:44:27,228 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-09 18:44:27,231 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-09 18:44:27,232 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.09 06:44:22" (1/3) ... [2019-09-09 18:44:27,232 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25b4908 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 06:44:27, skipping insertion in model container [2019-09-09 18:44:27,233 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 06:44:23" (2/3) ... [2019-09-09 18:44:27,233 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25b4908 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 06:44:27, skipping insertion in model container [2019-09-09 18:44:27,233 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 06:44:27" (3/3) ... [2019-09-09 18:44:27,235 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem15_label00.c [2019-09-09 18:44:27,246 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-09 18:44:27,256 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-09 18:44:27,275 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-09 18:44:27,306 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-09 18:44:27,306 INFO L378 AbstractCegarLoop]: Hoare is false [2019-09-09 18:44:27,306 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-09 18:44:27,307 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-09 18:44:27,307 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-09 18:44:27,307 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-09 18:44:27,307 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-09 18:44:27,307 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-09 18:44:27,352 INFO L276 IsEmpty]: Start isEmpty. Operand 437 states. [2019-09-09 18:44:27,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-09-09 18:44:27,364 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 18:44:27,365 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-09 18:44:27,367 INFO L418 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 18:44:27,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 18:44:27,373 INFO L82 PathProgramCache]: Analyzing trace with hash 982719640, now seen corresponding path program 1 times [2019-09-09 18:44:27,375 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 18:44:27,432 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 18:44:27,433 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 18:44:27,433 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 18:44:27,433 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 18:44:27,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 18:44:27,631 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 18:44:27,633 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 18:44:27,634 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-09 18:44:27,634 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 18:44:27,639 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-09 18:44:27,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-09 18:44:27,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-09 18:44:27,658 INFO L87 Difference]: Start difference. First operand 437 states. Second operand 3 states. [2019-09-09 18:44:31,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 18:44:31,340 INFO L93 Difference]: Finished difference Result 754 states and 1077 transitions. [2019-09-09 18:44:31,340 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-09 18:44:31,341 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2019-09-09 18:44:31,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 18:44:31,368 INFO L225 Difference]: With dead ends: 754 [2019-09-09 18:44:31,369 INFO L226 Difference]: Without dead ends: 685 [2019-09-09 18:44:31,371 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 18:44:31,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 685 states. [2019-09-09 18:44:31,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 685 to 683. [2019-09-09 18:44:31,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 683 states. [2019-09-09 18:44:31,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 683 states to 683 states and 1004 transitions. [2019-09-09 18:44:31,479 INFO L78 Accepts]: Start accepts. Automaton has 683 states and 1004 transitions. Word has length 12 [2019-09-09 18:44:31,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 18:44:31,480 INFO L475 AbstractCegarLoop]: Abstraction has 683 states and 1004 transitions. [2019-09-09 18:44:31,480 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-09 18:44:31,480 INFO L276 IsEmpty]: Start isEmpty. Operand 683 states and 1004 transitions. [2019-09-09 18:44:31,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2019-09-09 18:44:31,484 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 18:44:31,485 INFO L399 BasicCegarLoop]: trace histogram [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] [2019-09-09 18:44:31,485 INFO L418 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 18:44:31,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 18:44:31,486 INFO L82 PathProgramCache]: Analyzing trace with hash 1111586940, now seen corresponding path program 1 times [2019-09-09 18:44:31,486 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 18:44:31,488 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 18:44:31,488 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 18:44:31,488 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 18:44:31,488 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 18:44:31,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 18:44:31,776 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 18:44:31,777 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-09 18:44:31,777 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-09 18:44:31,778 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 82 with the following transitions: [2019-09-09 18:44:31,781 INFO L207 CegarAbsIntRunner]: [0], [1], [74], [77], [79], [82], [90], [98], [106], [114], [122], [130], [138], [146], [154], [162], [170], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [498], [506], [514], [522], [530], [538], [546], [554], [562], [566], [1635], [1639], [1648], [1652], [1654], [1661], [1662], [1663], [1665], [1666] [2019-09-09 18:44:31,849 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-09 18:44:31,850 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-09 18:44:33,076 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-09-09 18:44:33,079 INFO L272 AbstractInterpreter]: Visited 73 different actions 73 times. Never merged. Never widened. Performed 185 root evaluator evaluations with a maximum evaluation depth of 9. Performed 185 inverse root evaluator evaluations with a maximum inverse evaluation depth of 9. Never found a fixpoint. Largest state had 24 variables. [2019-09-09 18:44:33,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 18:44:33,084 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-09-09 18:44:33,778 INFO L227 lantSequenceWeakener]: Weakened 67 states. On average, predicates are now at 77.31% of their original sizes. [2019-09-09 18:44:33,778 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-09-09 18:44:33,868 INFO L420 sIntCurrentIteration]: We unified 80 AI predicates to 80 [2019-09-09 18:44:33,869 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-09-09 18:44:33,870 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-09 18:44:33,870 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [10] imperfect sequences [6] total 14 [2019-09-09 18:44:33,870 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 18:44:33,872 INFO L454 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-09-09 18:44:33,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-09-09 18:44:33,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2019-09-09 18:44:33,878 INFO L87 Difference]: Start difference. First operand 683 states and 1004 transitions. Second operand 10 states. [2019-09-09 18:44:42,426 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-09-09 18:54:57,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 18:54:57,571 INFO L93 Difference]: Finished difference Result 994 states and 1326 transitions. [2019-09-09 18:54:57,572 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-09-09 18:54:57,572 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 81 [2019-09-09 18:54:57,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 18:54:57,578 INFO L225 Difference]: With dead ends: 994 [2019-09-09 18:54:57,578 INFO L226 Difference]: Without dead ends: 994 [2019-09-09 18:54:57,579 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2019-09-09 18:54:57,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 994 states. [2019-09-09 18:54:57,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 994 to 990. [2019-09-09 18:54:57,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 990 states. [2019-09-09 18:54:57,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 990 states to 990 states and 1319 transitions. [2019-09-09 18:54:57,625 INFO L78 Accepts]: Start accepts. Automaton has 990 states and 1319 transitions. Word has length 81 [2019-09-09 18:54:57,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 18:54:57,626 INFO L475 AbstractCegarLoop]: Abstraction has 990 states and 1319 transitions. [2019-09-09 18:54:57,626 INFO L476 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-09-09 18:54:57,626 INFO L276 IsEmpty]: Start isEmpty. Operand 990 states and 1319 transitions. [2019-09-09 18:54:57,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2019-09-09 18:54:57,630 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 18:54:57,630 INFO L399 BasicCegarLoop]: trace histogram [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 18:54:57,631 INFO L418 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 18:54:57,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 18:54:57,631 INFO L82 PathProgramCache]: Analyzing trace with hash -2041176518, now seen corresponding path program 1 times [2019-09-09 18:54:57,632 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 18:54:57,633 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 18:54:57,633 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 18:54:57,633 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 18:54:57,633 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 18:54:57,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 18:54:57,839 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 18:54:57,840 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-09 18:54:57,840 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-09 18:54:57,840 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 108 with the following transitions: [2019-09-09 18:54:57,841 INFO L207 CegarAbsIntRunner]: [0], [1], [74], [77], [79], [82], [90], [98], [106], [114], [122], [130], [138], [146], [154], [162], [170], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [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], [691], [1635], [1639], [1648], [1652], [1654], [1661], [1662], [1663], [1665], [1666] [2019-09-09 18:54:57,845 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-09 18:54:57,845 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-09 18:54:59,052 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-09-09 18:54:59,868 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-09-09 18:54:59,869 INFO L272 AbstractInterpreter]: Visited 102 different actions 199 times. Merged at 4 different actions 5 times. Never widened. Performed 450 root evaluator evaluations with a maximum evaluation depth of 13. Performed 450 inverse root evaluator evaluations with a maximum inverse evaluation depth of 13. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2019-09-09 18:54:59,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 18:54:59,870 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-09-09 18:55:00,390 INFO L227 lantSequenceWeakener]: Weakened 104 states. On average, predicates are now at 76.94% of their original sizes. [2019-09-09 18:55:00,391 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-09-09 18:55:00,476 INFO L420 sIntCurrentIteration]: We unified 106 AI predicates to 106 [2019-09-09 18:55:00,476 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-09-09 18:55:00,476 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-09 18:55:00,477 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [11] imperfect sequences [6] total 15 [2019-09-09 18:55:00,477 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 18:55:00,477 INFO L454 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-09-09 18:55:00,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-09-09 18:55:00,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2019-09-09 18:55:00,478 INFO L87 Difference]: Start difference. First operand 990 states and 1319 transitions. Second operand 11 states.