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_label59.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-112bae1 [2019-09-09 19:43:58,534 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-09 19:43:58,536 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-09 19:43:58,549 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-09-09 19:43:58,558 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-09 19:43:58,559 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-09 19:43:58,560 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-09 19:43:58,561 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-09 19:43:58,562 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-09 19:43:58,563 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-09 19:43:58,564 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-09 19:43:58,566 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-09 19:43:58,568 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-09 19:43:58,569 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-09 19:43:58,570 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-09 19:43:58,571 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-09 19:43:58,573 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-09-09 19:43:58,583 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 19:43:58,598 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-09 19:43:58,599 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-09 19:43:58,599 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-09-09 19:43:58,599 INFO L138 SettingsManager]: * Log level for plugins=info [2019-09-09 19:43:58,600 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-09-09 19:43:58,600 INFO L138 SettingsManager]: * User list type=DISABLED [2019-09-09 19:43:58,600 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-09-09 19:43:58,601 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-09-09 19:43:58,601 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-09-09 19:43:58,601 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-09-09 19:43:58,602 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-09 19:43:58,602 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-09 19:43:58,602 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-09 19:43:58,602 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-09 19:43:58,603 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-09 19:43:58,603 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-09 19:43:58,603 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-09 19:43:58,603 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-09 19:43:58,603 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-09 19:43:58,603 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-09 19:43:58,604 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-09 19:43:58,604 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-09-09 19:43:58,604 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-09 19:43:58,604 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-09 19:43:58,605 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-09 19:43:58,605 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-09 19:43:58,605 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-09-09 19:43:58,605 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-09 19:43:58,606 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-09 19:43:58,606 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-09-09 19:43:58,635 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-09 19:43:58,648 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-09 19:43:58,651 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-09 19:43:58,653 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-09 19:43:58,653 INFO L275 PluginConnector]: CDTParser initialized [2019-09-09 19:43:58,654 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem15_label59.c [2019-09-09 19:43:58,717 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c3c8c1bbb/c4c2fb6779e94578809ebacaec2adc5b/FLAG34cb6e1cb [2019-09-09 19:43:59,340 INFO L306 CDTParser]: Found 1 translation units. [2019-09-09 19:43:59,341 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem15_label59.c [2019-09-09 19:43:59,359 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c3c8c1bbb/c4c2fb6779e94578809ebacaec2adc5b/FLAG34cb6e1cb [2019-09-09 19:43:59,519 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c3c8c1bbb/c4c2fb6779e94578809ebacaec2adc5b [2019-09-09 19:43:59,532 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-09 19:43:59,534 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-09 19:43:59,538 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-09 19:43:59,538 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-09 19:43:59,542 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-09 19:43:59,544 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 07:43:59" (1/1) ... [2019-09-09 19:43:59,547 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@52c661a5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 07:43:59, skipping insertion in model container [2019-09-09 19:43:59,547 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 07:43:59" (1/1) ... [2019-09-09 19:43:59,555 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-09 19:43:59,648 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-09 19:44:00,468 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 19:44:00,484 INFO L188 MainTranslator]: Completed pre-run [2019-09-09 19:44:00,874 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 19:44:00,895 INFO L192 MainTranslator]: Completed translation [2019-09-09 19:44:00,896 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 07:44:00 WrapperNode [2019-09-09 19:44:00,897 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-09 19:44:00,897 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-09 19:44:00,898 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-09 19:44:00,898 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-09 19:44:00,913 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 07:44:00" (1/1) ... [2019-09-09 19:44:00,915 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 07:44:00" (1/1) ... [2019-09-09 19:44:00,962 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 07:44:00" (1/1) ... [2019-09-09 19:44:00,962 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 07:44:00" (1/1) ... [2019-09-09 19:44:01,029 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 07:44:00" (1/1) ... [2019-09-09 19:44:01,056 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 07:44:00" (1/1) ... [2019-09-09 19:44:01,078 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 07:44:00" (1/1) ... [2019-09-09 19:44:01,100 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-09 19:44:01,101 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-09 19:44:01,101 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-09 19:44:01,101 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-09 19:44:01,102 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 07:44:00" (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 19:44:01,188 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-09 19:44:01,189 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-09 19:44:01,189 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-09-09 19:44:01,189 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-09-09 19:44:01,190 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-09 19:44:01,190 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-09-09 19:44:01,190 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-09-09 19:44:01,190 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-09 19:44:01,190 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-09 19:44:01,191 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-09-09 19:44:01,191 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-09 19:44:01,191 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-09 19:44:01,191 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-09 19:44:04,089 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-09 19:44:04,089 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-09-09 19:44:04,091 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 07:44:04 BoogieIcfgContainer [2019-09-09 19:44:04,091 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-09 19:44:04,092 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-09 19:44:04,092 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-09 19:44:04,095 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-09 19:44:04,095 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.09 07:43:59" (1/3) ... [2019-09-09 19:44:04,096 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4eef009b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 07:44:04, skipping insertion in model container [2019-09-09 19:44:04,096 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 07:44:00" (2/3) ... [2019-09-09 19:44:04,097 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4eef009b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 07:44:04, skipping insertion in model container [2019-09-09 19:44:04,097 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 07:44:04" (3/3) ... [2019-09-09 19:44:04,099 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem15_label59.c [2019-09-09 19:44:04,109 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-09 19:44:04,120 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-09 19:44:04,138 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-09 19:44:04,169 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-09 19:44:04,169 INFO L378 AbstractCegarLoop]: Hoare is false [2019-09-09 19:44:04,169 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-09 19:44:04,170 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-09 19:44:04,170 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-09 19:44:04,170 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-09 19:44:04,170 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-09 19:44:04,170 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-09 19:44:04,213 INFO L276 IsEmpty]: Start isEmpty. Operand 437 states. [2019-09-09 19:44:04,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2019-09-09 19:44:04,230 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 19:44:04,231 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 19:44:04,233 INFO L418 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 19:44:04,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 19:44:04,240 INFO L82 PathProgramCache]: Analyzing trace with hash -1109513128, now seen corresponding path program 1 times [2019-09-09 19:44:04,242 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 19:44:04,296 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 19:44:04,297 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 19:44:04,297 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 19:44:04,297 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 19:44:04,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 19:44:04,676 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 19:44:04,678 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 19:44:04,679 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-09-09 19:44:04,679 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 19:44:04,685 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-09-09 19:44:04,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-09-09 19:44:04,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-09 19:44:04,704 INFO L87 Difference]: Start difference. First operand 437 states. Second operand 4 states. [2019-09-09 19:44:09,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 19:44:09,347 INFO L93 Difference]: Finished difference Result 1123 states and 1943 transitions. [2019-09-09 19:44:09,347 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-09 19:44:09,349 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 60 [2019-09-09 19:44:09,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 19:44:09,389 INFO L225 Difference]: With dead ends: 1123 [2019-09-09 19:44:09,390 INFO L226 Difference]: Without dead ends: 1036 [2019-09-09 19:44:09,393 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 19:44:09,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1036 states. [2019-09-09 19:44:09,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1036 to 697. [2019-09-09 19:44:09,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 697 states. [2019-09-09 19:44:09,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 697 states to 697 states and 1188 transitions. [2019-09-09 19:44:09,528 INFO L78 Accepts]: Start accepts. Automaton has 697 states and 1188 transitions. Word has length 60 [2019-09-09 19:44:09,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 19:44:09,528 INFO L475 AbstractCegarLoop]: Abstraction has 697 states and 1188 transitions. [2019-09-09 19:44:09,529 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-09-09 19:44:09,529 INFO L276 IsEmpty]: Start isEmpty. Operand 697 states and 1188 transitions. [2019-09-09 19:44:09,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2019-09-09 19:44:09,535 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 19:44:09,535 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] [2019-09-09 19:44:09,535 INFO L418 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 19:44:09,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 19:44:09,536 INFO L82 PathProgramCache]: Analyzing trace with hash -933858500, now seen corresponding path program 1 times [2019-09-09 19:44:09,536 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 19:44:09,537 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 19:44:09,537 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 19:44:09,538 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 19:44:09,538 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 19:44:09,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 19:44:09,754 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 19:44:09,754 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 19:44:09,755 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-09-09 19:44:09,755 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 19:44:09,759 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-09-09 19:44:09,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-09-09 19:44:09,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-09 19:44:09,760 INFO L87 Difference]: Start difference. First operand 697 states and 1188 transitions. Second operand 4 states. [2019-09-09 19:44:13,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 19:44:13,591 INFO L93 Difference]: Finished difference Result 1942 states and 3051 transitions. [2019-09-09 19:44:13,591 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-09 19:44:13,591 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 129 [2019-09-09 19:44:13,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 19:44:13,611 INFO L225 Difference]: With dead ends: 1942 [2019-09-09 19:44:13,611 INFO L226 Difference]: Without dead ends: 1942 [2019-09-09 19:44:13,612 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 19:44:13,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1942 states. [2019-09-09 19:44:13,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1942 to 1942. [2019-09-09 19:44:13,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1942 states. [2019-09-09 19:44:13,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1942 states to 1942 states and 3051 transitions. [2019-09-09 19:44:13,699 INFO L78 Accepts]: Start accepts. Automaton has 1942 states and 3051 transitions. Word has length 129 [2019-09-09 19:44:13,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 19:44:13,703 INFO L475 AbstractCegarLoop]: Abstraction has 1942 states and 3051 transitions. [2019-09-09 19:44:13,704 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-09-09 19:44:13,704 INFO L276 IsEmpty]: Start isEmpty. Operand 1942 states and 3051 transitions. [2019-09-09 19:44:13,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2019-09-09 19:44:13,718 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 19:44:13,718 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] [2019-09-09 19:44:13,719 INFO L418 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 19:44:13,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 19:44:13,720 INFO L82 PathProgramCache]: Analyzing trace with hash -1262729336, now seen corresponding path program 1 times [2019-09-09 19:44:13,720 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 19:44:13,721 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 19:44:13,722 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 19:44:13,722 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 19:44:13,722 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 19:44:13,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 19:44:13,973 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 19:44:13,974 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 19:44:13,975 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-09-09 19:44:13,975 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 19:44:13,978 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-09 19:44:13,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-09 19:44:13,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-09-09 19:44:13,979 INFO L87 Difference]: Start difference. First operand 1942 states and 3051 transitions. Second operand 5 states. [2019-09-09 19:44:19,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 19:44:19,099 INFO L93 Difference]: Finished difference Result 3882 states and 5795 transitions. [2019-09-09 19:44:19,100 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-09-09 19:44:19,100 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 150 [2019-09-09 19:44:19,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 19:44:19,123 INFO L225 Difference]: With dead ends: 3882 [2019-09-09 19:44:19,123 INFO L226 Difference]: Without dead ends: 3882 [2019-09-09 19:44:19,124 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 19:44:19,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3882 states. [2019-09-09 19:44:19,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3882 to 3857. [2019-09-09 19:44:19,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3857 states. [2019-09-09 19:44:19,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3857 states to 3857 states and 5736 transitions. [2019-09-09 19:44:19,264 INFO L78 Accepts]: Start accepts. Automaton has 3857 states and 5736 transitions. Word has length 150 [2019-09-09 19:44:19,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 19:44:19,266 INFO L475 AbstractCegarLoop]: Abstraction has 3857 states and 5736 transitions. [2019-09-09 19:44:19,266 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-09 19:44:19,266 INFO L276 IsEmpty]: Start isEmpty. Operand 3857 states and 5736 transitions. [2019-09-09 19:44:19,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2019-09-09 19:44:19,269 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 19:44:19,270 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, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-09 19:44:19,270 INFO L418 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 19:44:19,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 19:44:19,271 INFO L82 PathProgramCache]: Analyzing trace with hash 1278749795, now seen corresponding path program 1 times [2019-09-09 19:44:19,271 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 19:44:19,272 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 19:44:19,272 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 19:44:19,272 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 19:44:19,272 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 19:44:19,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 19:44:19,470 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 19:44:19,472 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 19:44:19,472 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-09-09 19:44:19,472 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 19:44:19,473 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-09 19:44:19,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-09 19:44:19,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-09-09 19:44:19,474 INFO L87 Difference]: Start difference. First operand 3857 states and 5736 transitions. Second operand 6 states. [2019-09-09 19:44:22,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 19:44:22,838 INFO L93 Difference]: Finished difference Result 6436 states and 9985 transitions. [2019-09-09 19:44:22,839 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-09 19:44:22,839 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 163 [2019-09-09 19:44:22,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 19:44:22,885 INFO L225 Difference]: With dead ends: 6436 [2019-09-09 19:44:22,885 INFO L226 Difference]: Without dead ends: 6436 [2019-09-09 19:44:22,886 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 19:44:22,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6436 states. [2019-09-09 19:44:23,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6436 to 6386. [2019-09-09 19:44:23,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6386 states. [2019-09-09 19:44:23,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6386 states to 6386 states and 9588 transitions. [2019-09-09 19:44:23,098 INFO L78 Accepts]: Start accepts. Automaton has 6386 states and 9588 transitions. Word has length 163 [2019-09-09 19:44:23,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 19:44:23,099 INFO L475 AbstractCegarLoop]: Abstraction has 6386 states and 9588 transitions. [2019-09-09 19:44:23,099 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-09 19:44:23,099 INFO L276 IsEmpty]: Start isEmpty. Operand 6386 states and 9588 transitions. [2019-09-09 19:44:23,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2019-09-09 19:44:23,104 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 19:44:23,104 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-09 19:44:23,105 INFO L418 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 19:44:23,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 19:44:23,105 INFO L82 PathProgramCache]: Analyzing trace with hash -457386156, now seen corresponding path program 1 times [2019-09-09 19:44:23,105 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 19:44:23,106 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 19:44:23,106 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 19:44:23,106 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 19:44:23,107 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 19:44:23,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 19:44:23,253 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 19:44:23,253 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 19:44:23,253 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-09-09 19:44:23,253 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 19:44:23,254 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-09 19:44:23,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-09 19:44:23,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-09-09 19:44:23,255 INFO L87 Difference]: Start difference. First operand 6386 states and 9588 transitions. Second operand 5 states. [2019-09-09 19:44:26,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 19:44:26,555 INFO L93 Difference]: Finished difference Result 11194 states and 14624 transitions. [2019-09-09 19:44:26,560 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-09-09 19:44:26,560 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 176 [2019-09-09 19:44:26,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 19:44:26,606 INFO L225 Difference]: With dead ends: 11194 [2019-09-09 19:44:26,607 INFO L226 Difference]: Without dead ends: 7078 [2019-09-09 19:44:26,608 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 19:44:26,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7078 states. [2019-09-09 19:44:26,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7078 to 7041. [2019-09-09 19:44:26,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7041 states. [2019-09-09 19:44:26,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7041 states to 7041 states and 8725 transitions. [2019-09-09 19:44:26,774 INFO L78 Accepts]: Start accepts. Automaton has 7041 states and 8725 transitions. Word has length 176 [2019-09-09 19:44:26,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 19:44:26,775 INFO L475 AbstractCegarLoop]: Abstraction has 7041 states and 8725 transitions. [2019-09-09 19:44:26,775 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-09 19:44:26,775 INFO L276 IsEmpty]: Start isEmpty. Operand 7041 states and 8725 transitions. [2019-09-09 19:44:26,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2019-09-09 19:44:26,779 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 19:44:26,779 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:44:26,779 INFO L418 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 19:44:26,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 19:44:26,780 INFO L82 PathProgramCache]: Analyzing trace with hash -636504067, now seen corresponding path program 1 times [2019-09-09 19:44:26,780 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 19:44:26,783 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 19:44:26,783 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 19:44:26,783 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 19:44:26,783 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 19:44:26,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 19:44:26,998 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 3 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 19:44:26,998 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-09 19:44:26,998 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-09 19:44:26,999 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 208 with the following transitions: [2019-09-09 19:44:27,001 INFO L207 CegarAbsIntRunner]: [0], [1], [74], [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], [393], [401], [409], [417], [425], [433], [441], [449], [457], [461], [463], [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], [962], [1635], [1639], [1648], [1652], [1654], [1661], [1662], [1663], [1665], [1666] [2019-09-09 19:44:27,060 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-09 19:44:27,060 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-09 19:44:34,095 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-09-09 19:44:34,097 INFO L272 AbstractInterpreter]: Visited 151 different actions 151 times. Never merged. Never widened. Performed 341 root evaluator evaluations with a maximum evaluation depth of 14. Performed 341 inverse root evaluator evaluations with a maximum inverse evaluation depth of 14. Never found a fixpoint. Largest state had 24 variables. [2019-09-09 19:44:34,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 19:44:34,102 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-09-09 19:44:38,848 INFO L227 lantSequenceWeakener]: Weakened 193 states. On average, predicates are now at 78.42% of their original sizes. [2019-09-09 19:44:38,849 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-09-09 19:44:38,975 INFO L420 sIntCurrentIteration]: We unified 206 AI predicates to 206 [2019-09-09 19:44:38,975 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-09-09 19:44:38,976 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-09 19:44:38,977 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [11] imperfect sequences [7] total 16 [2019-09-09 19:44:38,977 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 19:44:38,978 INFO L454 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-09-09 19:44:38,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-09-09 19:44:38,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2019-09-09 19:44:38,980 INFO L87 Difference]: Start difference. First operand 7041 states and 8725 transitions. Second operand 11 states. [2019-09-09 19:45:40,598 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-09-09 19:52:55,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 19:52:55,612 INFO L93 Difference]: Finished difference Result 7045 states and 8716 transitions. [2019-09-09 19:52:55,612 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-09-09 19:52:55,612 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 207 [2019-09-09 19:52:55,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 19:52:55,642 INFO L225 Difference]: With dead ends: 7045 [2019-09-09 19:52:55,643 INFO L226 Difference]: Without dead ends: 7045 [2019-09-09 19:52:55,643 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 197 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 19:52:55,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7045 states. [2019-09-09 19:52:55,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7045 to 7041. [2019-09-09 19:52:55,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7041 states. [2019-09-09 19:52:55,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7041 states to 7041 states and 8709 transitions. [2019-09-09 19:52:55,795 INFO L78 Accepts]: Start accepts. Automaton has 7041 states and 8709 transitions. Word has length 207 [2019-09-09 19:52:55,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 19:52:55,795 INFO L475 AbstractCegarLoop]: Abstraction has 7041 states and 8709 transitions. [2019-09-09 19:52:55,796 INFO L476 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-09-09 19:52:55,796 INFO L276 IsEmpty]: Start isEmpty. Operand 7041 states and 8709 transitions. [2019-09-09 19:52:55,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 298 [2019-09-09 19:52:55,804 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 19:52:55,805 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:52:55,805 INFO L418 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 19:52:55,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 19:52:55,806 INFO L82 PathProgramCache]: Analyzing trace with hash -166189619, now seen corresponding path program 1 times [2019-09-09 19:52:55,806 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 19:52:55,807 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 19:52:55,807 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 19:52:55,808 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 19:52:55,808 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 19:52:55,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 19:52:56,170 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 3 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 19:52:56,170 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-09 19:52:56,170 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-09 19:52:56,171 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 298 with the following transitions: [2019-09-09 19:52:56,174 INFO L207 CegarAbsIntRunner]: [0], [1], [74], [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], [393], [401], [409], [417], [425], [433], [441], [449], [457], [461], [463], [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], [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 19:52:56,193 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-09 19:52:56,193 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-09 19:53:07,365 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-09-09 19:53:12,667 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-09-09 19:53:12,668 INFO L272 AbstractInterpreter]: Visited 244 different actions 483 times. Merged at 4 different actions 5 times. Never widened. Performed 869 root evaluator evaluations with a maximum evaluation depth of 14. Performed 869 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 19:53:12,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 19:53:12,669 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-09-09 19:53:16,945 INFO L227 lantSequenceWeakener]: Weakened 294 states. On average, predicates are now at 77.9% of their original sizes. [2019-09-09 19:53:16,946 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-09-09 19:53:17,054 INFO L420 sIntCurrentIteration]: We unified 296 AI predicates to 296 [2019-09-09 19:53:17,054 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-09-09 19:53:17,054 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-09 19:53:17,055 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [12] imperfect sequences [7] total 17 [2019-09-09 19:53:17,055 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 19:53:17,056 INFO L454 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-09-09 19:53:17,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-09-09 19:53:17,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2019-09-09 19:53:17,057 INFO L87 Difference]: Start difference. First operand 7041 states and 8709 transitions. Second operand 12 states.