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/Problem16_label59.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-673a906-m [2019-10-02 21:48:23,988 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-02 21:48:23,990 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-02 21:48:24,003 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-10-02 21:48:24,023 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-02 21:48:24,024 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-02 21:48:24,028 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-02 21:48:24,029 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-02 21:48:24,030 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-02 21:48:24,034 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-02 21:48:24,037 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-02 21:48:24,039 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-02 21:48:24,042 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-02 21:48:24,044 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-02 21:48:24,045 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-02 21:48:24,047 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-02 21:48:24,051 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-02 21:48:24,064 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-02 21:48:24,065 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-02 21:48:24,067 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-02 21:48:24,069 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/svcomp-Reach-32bit-Automizer_Default+AIv2_INT.epf [2019-10-02 21:48:24,090 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-02 21:48:24,090 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-02 21:48:24,091 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-10-02 21:48:24,092 INFO L138 SettingsManager]: * Log level for plugins=info [2019-10-02 21:48:24,092 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-10-02 21:48:24,092 INFO L138 SettingsManager]: * User list type=DISABLED [2019-10-02 21:48:24,093 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-10-02 21:48:24,093 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-10-02 21:48:24,093 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-10-02 21:48:24,093 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-10-02 21:48:24,095 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-02 21:48:24,095 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-02 21:48:24,096 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-02 21:48:24,096 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-02 21:48:24,096 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-02 21:48:24,096 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-02 21:48:24,097 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-02 21:48:24,097 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-02 21:48:24,097 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-02 21:48:24,097 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-02 21:48:24,097 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-02 21:48:24,098 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-10-02 21:48:24,098 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-02 21:48:24,098 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-02 21:48:24,098 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-02 21:48:24,099 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-02 21:48:24,099 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-10-02 21:48:24,099 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-02 21:48:24,099 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-02 21:48:24,099 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-10-02 21:48:24,149 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-02 21:48:24,163 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-02 21:48:24,167 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-02 21:48:24,168 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-02 21:48:24,169 INFO L275 PluginConnector]: CDTParser initialized [2019-10-02 21:48:24,169 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem16_label59.c [2019-10-02 21:48:24,236 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e85d730f0/db47dd4fc53a4cb0aa140fb893991961/FLAGcc21790b8 [2019-10-02 21:48:24,924 INFO L306 CDTParser]: Found 1 translation units. [2019-10-02 21:48:24,928 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem16_label59.c [2019-10-02 21:48:24,954 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e85d730f0/db47dd4fc53a4cb0aa140fb893991961/FLAGcc21790b8 [2019-10-02 21:48:25,075 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e85d730f0/db47dd4fc53a4cb0aa140fb893991961 [2019-10-02 21:48:25,088 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-02 21:48:25,089 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-02 21:48:25,090 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-02 21:48:25,091 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-02 21:48:25,094 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-02 21:48:25,095 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.10 09:48:25" (1/1) ... [2019-10-02 21:48:25,098 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@283534bd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 09:48:25, skipping insertion in model container [2019-10-02 21:48:25,098 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.10 09:48:25" (1/1) ... [2019-10-02 21:48:25,106 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-02 21:48:25,193 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-02 21:48:25,980 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-02 21:48:25,986 INFO L188 MainTranslator]: Completed pre-run [2019-10-02 21:48:26,322 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-02 21:48:26,352 INFO L192 MainTranslator]: Completed translation [2019-10-02 21:48:26,354 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 09:48:26 WrapperNode [2019-10-02 21:48:26,354 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-02 21:48:26,355 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-02 21:48:26,356 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-02 21:48:26,356 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-02 21:48:26,373 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 09:48:26" (1/1) ... [2019-10-02 21:48:26,375 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 09:48:26" (1/1) ... [2019-10-02 21:48:26,424 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 09:48:26" (1/1) ... [2019-10-02 21:48:26,425 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 09:48:26" (1/1) ... [2019-10-02 21:48:26,502 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 09:48:26" (1/1) ... [2019-10-02 21:48:26,532 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 09:48:26" (1/1) ... [2019-10-02 21:48:26,552 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 09:48:26" (1/1) ... [2019-10-02 21:48:26,569 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-02 21:48:26,570 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-02 21:48:26,570 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-02 21:48:26,570 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-02 21:48:26,571 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 09:48:26" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-02 21:48:26,635 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-02 21:48:26,636 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-02 21:48:26,636 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-02 21:48:26,636 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-10-02 21:48:26,636 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-02 21:48:26,637 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-02 21:48:26,637 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-10-02 21:48:26,637 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-02 21:48:26,637 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-02 21:48:26,637 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-02 21:48:26,638 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-02 21:48:26,638 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-02 21:48:26,638 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-02 21:48:29,063 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-02 21:48:29,063 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-02 21:48:29,065 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.10 09:48:29 BoogieIcfgContainer [2019-10-02 21:48:29,065 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-02 21:48:29,066 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-02 21:48:29,067 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-02 21:48:29,070 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-02 21:48:29,070 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.10 09:48:25" (1/3) ... [2019-10-02 21:48:29,071 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1de9f433 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.10 09:48:29, skipping insertion in model container [2019-10-02 21:48:29,071 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 09:48:26" (2/3) ... [2019-10-02 21:48:29,072 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1de9f433 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.10 09:48:29, skipping insertion in model container [2019-10-02 21:48:29,072 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.10 09:48:29" (3/3) ... [2019-10-02 21:48:29,074 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem16_label59.c [2019-10-02 21:48:29,084 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-02 21:48:29,093 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-02 21:48:29,110 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-02 21:48:29,138 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-10-02 21:48:29,138 INFO L378 AbstractCegarLoop]: Hoare is false [2019-10-02 21:48:29,138 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-02 21:48:29,138 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-02 21:48:29,138 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-02 21:48:29,139 INFO L382 AbstractCegarLoop]: Difference is false [2019-10-02 21:48:29,139 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-02 21:48:29,139 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-02 21:48:29,167 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states. [2019-10-02 21:48:29,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2019-10-02 21:48:29,179 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 21:48:29,180 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 21:48:29,183 INFO L418 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 21:48:29,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 21:48:29,189 INFO L82 PathProgramCache]: Analyzing trace with hash 441103245, now seen corresponding path program 1 times [2019-10-02 21:48:29,191 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 21:48:29,249 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 21:48:29,249 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 21:48:29,250 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 21:48:29,250 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 21:48:29,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 21:48:29,564 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 21:48:29,566 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 21:48:29,567 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-02 21:48:29,567 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 21:48:29,573 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-02 21:48:29,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-02 21:48:29,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-02 21:48:29,594 INFO L87 Difference]: Start difference. First operand 409 states. Second operand 4 states. [2019-10-02 21:48:33,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 21:48:33,157 INFO L93 Difference]: Finished difference Result 1106 states and 1937 transitions. [2019-10-02 21:48:33,157 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-02 21:48:33,159 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 50 [2019-10-02 21:48:33,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 21:48:33,197 INFO L225 Difference]: With dead ends: 1106 [2019-10-02 21:48:33,197 INFO L226 Difference]: Without dead ends: 1019 [2019-10-02 21:48:33,199 INFO L640 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 [2019-10-02 21:48:33,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1019 states. [2019-10-02 21:48:33,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1019 to 682. [2019-10-02 21:48:33,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 682 states. [2019-10-02 21:48:33,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 682 states to 682 states and 1190 transitions. [2019-10-02 21:48:33,314 INFO L78 Accepts]: Start accepts. Automaton has 682 states and 1190 transitions. Word has length 50 [2019-10-02 21:48:33,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 21:48:33,315 INFO L475 AbstractCegarLoop]: Abstraction has 682 states and 1190 transitions. [2019-10-02 21:48:33,316 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-02 21:48:33,316 INFO L276 IsEmpty]: Start isEmpty. Operand 682 states and 1190 transitions. [2019-10-02 21:48:33,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2019-10-02 21:48:33,333 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 21:48:33,333 INFO L411 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 21:48:33,334 INFO L418 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 21:48:33,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 21:48:33,334 INFO L82 PathProgramCache]: Analyzing trace with hash -233546559, now seen corresponding path program 1 times [2019-10-02 21:48:33,335 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 21:48:33,338 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 21:48:33,338 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 21:48:33,338 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 21:48:33,338 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 21:48:33,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 21:48:33,570 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 21:48:33,570 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 21:48:33,570 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-02 21:48:33,571 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 21:48:33,573 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-02 21:48:33,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-02 21:48:33,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-02 21:48:33,574 INFO L87 Difference]: Start difference. First operand 682 states and 1190 transitions. Second operand 5 states. [2019-10-02 21:48:36,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 21:48:36,269 INFO L93 Difference]: Finished difference Result 1392 states and 2319 transitions. [2019-10-02 21:48:36,270 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-02 21:48:36,270 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 119 [2019-10-02 21:48:36,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 21:48:36,282 INFO L225 Difference]: With dead ends: 1392 [2019-10-02 21:48:36,282 INFO L226 Difference]: Without dead ends: 1392 [2019-10-02 21:48:36,284 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-10-02 21:48:36,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1392 states. [2019-10-02 21:48:36,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1392 to 1374. [2019-10-02 21:48:36,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1374 states. [2019-10-02 21:48:36,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1374 states to 1374 states and 2277 transitions. [2019-10-02 21:48:36,345 INFO L78 Accepts]: Start accepts. Automaton has 1374 states and 2277 transitions. Word has length 119 [2019-10-02 21:48:36,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 21:48:36,348 INFO L475 AbstractCegarLoop]: Abstraction has 1374 states and 2277 transitions. [2019-10-02 21:48:36,348 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-02 21:48:36,348 INFO L276 IsEmpty]: Start isEmpty. Operand 1374 states and 2277 transitions. [2019-10-02 21:48:36,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2019-10-02 21:48:36,352 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 21:48:36,352 INFO L411 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-02 21:48:36,353 INFO L418 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 21:48:36,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 21:48:36,354 INFO L82 PathProgramCache]: Analyzing trace with hash -702025816, now seen corresponding path program 1 times [2019-10-02 21:48:36,354 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 21:48:36,356 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 21:48:36,356 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 21:48:36,357 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 21:48:36,357 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 21:48:36,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 21:48:36,538 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 21:48:36,538 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 21:48:36,539 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-02 21:48:36,539 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 21:48:36,539 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-02 21:48:36,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-02 21:48:36,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-02 21:48:36,540 INFO L87 Difference]: Start difference. First operand 1374 states and 2277 transitions. Second operand 6 states. [2019-10-02 21:48:39,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 21:48:39,400 INFO L93 Difference]: Finished difference Result 2095 states and 3353 transitions. [2019-10-02 21:48:39,400 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-02 21:48:39,400 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 122 [2019-10-02 21:48:39,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 21:48:39,416 INFO L225 Difference]: With dead ends: 2095 [2019-10-02 21:48:39,417 INFO L226 Difference]: Without dead ends: 2095 [2019-10-02 21:48:39,417 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-10-02 21:48:39,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2095 states. [2019-10-02 21:48:39,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2095 to 2077. [2019-10-02 21:48:39,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2077 states. [2019-10-02 21:48:39,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2077 states to 2077 states and 3299 transitions. [2019-10-02 21:48:39,550 INFO L78 Accepts]: Start accepts. Automaton has 2077 states and 3299 transitions. Word has length 122 [2019-10-02 21:48:39,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 21:48:39,550 INFO L475 AbstractCegarLoop]: Abstraction has 2077 states and 3299 transitions. [2019-10-02 21:48:39,550 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-02 21:48:39,551 INFO L276 IsEmpty]: Start isEmpty. Operand 2077 states and 3299 transitions. [2019-10-02 21:48:39,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2019-10-02 21:48:39,552 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 21:48:39,552 INFO L411 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-02 21:48:39,553 INFO L418 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 21:48:39,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 21:48:39,554 INFO L82 PathProgramCache]: Analyzing trace with hash 1139332729, now seen corresponding path program 1 times [2019-10-02 21:48:39,554 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 21:48:39,555 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 21:48:39,555 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 21:48:39,555 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 21:48:39,556 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 21:48:39,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 21:48:39,739 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 21:48:39,740 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 21:48:39,740 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-02 21:48:39,740 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 21:48:39,741 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-02 21:48:39,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-02 21:48:39,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-02 21:48:39,741 INFO L87 Difference]: Start difference. First operand 2077 states and 3299 transitions. Second operand 6 states. [2019-10-02 21:48:42,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 21:48:42,275 INFO L93 Difference]: Finished difference Result 2803 states and 4104 transitions. [2019-10-02 21:48:42,283 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-02 21:48:42,283 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 123 [2019-10-02 21:48:42,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 21:48:42,300 INFO L225 Difference]: With dead ends: 2803 [2019-10-02 21:48:42,301 INFO L226 Difference]: Without dead ends: 2803 [2019-10-02 21:48:42,302 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-10-02 21:48:42,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2803 states. [2019-10-02 21:48:42,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2803 to 2790. [2019-10-02 21:48:42,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2790 states. [2019-10-02 21:48:42,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2790 states to 2790 states and 4061 transitions. [2019-10-02 21:48:42,385 INFO L78 Accepts]: Start accepts. Automaton has 2790 states and 4061 transitions. Word has length 123 [2019-10-02 21:48:42,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 21:48:42,387 INFO L475 AbstractCegarLoop]: Abstraction has 2790 states and 4061 transitions. [2019-10-02 21:48:42,387 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-02 21:48:42,387 INFO L276 IsEmpty]: Start isEmpty. Operand 2790 states and 4061 transitions. [2019-10-02 21:48:42,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2019-10-02 21:48:42,389 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 21:48:42,390 INFO L411 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-02 21:48:42,390 INFO L418 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 21:48:42,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 21:48:42,391 INFO L82 PathProgramCache]: Analyzing trace with hash 721853152, now seen corresponding path program 1 times [2019-10-02 21:48:42,391 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 21:48:42,392 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 21:48:42,392 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 21:48:42,392 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 21:48:42,392 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 21:48:42,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 21:48:42,557 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 21:48:42,557 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 21:48:42,558 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-02 21:48:42,558 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 21:48:42,559 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-02 21:48:42,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-02 21:48:42,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-02 21:48:42,560 INFO L87 Difference]: Start difference. First operand 2790 states and 4061 transitions. Second operand 6 states. [2019-10-02 21:48:45,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 21:48:45,337 INFO L93 Difference]: Finished difference Result 4578 states and 6828 transitions. [2019-10-02 21:48:45,338 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-02 21:48:45,339 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 126 [2019-10-02 21:48:45,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 21:48:45,364 INFO L225 Difference]: With dead ends: 4578 [2019-10-02 21:48:45,364 INFO L226 Difference]: Without dead ends: 4578 [2019-10-02 21:48:45,365 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-10-02 21:48:45,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4578 states. [2019-10-02 21:48:45,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4578 to 4526. [2019-10-02 21:48:45,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4526 states. [2019-10-02 21:48:45,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4526 states to 4526 states and 6572 transitions. [2019-10-02 21:48:45,500 INFO L78 Accepts]: Start accepts. Automaton has 4526 states and 6572 transitions. Word has length 126 [2019-10-02 21:48:45,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 21:48:45,500 INFO L475 AbstractCegarLoop]: Abstraction has 4526 states and 6572 transitions. [2019-10-02 21:48:45,500 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-02 21:48:45,500 INFO L276 IsEmpty]: Start isEmpty. Operand 4526 states and 6572 transitions. [2019-10-02 21:48:45,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2019-10-02 21:48:45,502 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 21:48:45,502 INFO L411 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-02 21:48:45,503 INFO L418 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 21:48:45,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 21:48:45,503 INFO L82 PathProgramCache]: Analyzing trace with hash -1023749808, now seen corresponding path program 1 times [2019-10-02 21:48:45,503 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 21:48:45,506 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 21:48:45,507 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 21:48:45,507 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 21:48:45,507 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 21:48:45,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 21:48:45,654 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 21:48:45,654 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 21:48:45,655 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-02 21:48:45,655 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 21:48:45,655 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-02 21:48:45,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-02 21:48:45,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-02 21:48:45,656 INFO L87 Difference]: Start difference. First operand 4526 states and 6572 transitions. Second operand 6 states. [2019-10-02 21:48:48,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 21:48:48,327 INFO L93 Difference]: Finished difference Result 7630 states and 10198 transitions. [2019-10-02 21:48:48,327 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-02 21:48:48,327 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 134 [2019-10-02 21:48:48,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 21:48:48,372 INFO L225 Difference]: With dead ends: 7630 [2019-10-02 21:48:48,372 INFO L226 Difference]: Without dead ends: 7630 [2019-10-02 21:48:48,373 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-10-02 21:48:48,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7630 states. [2019-10-02 21:48:48,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7630 to 6239. [2019-10-02 21:48:48,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6239 states. [2019-10-02 21:48:48,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6239 states to 6239 states and 8457 transitions. [2019-10-02 21:48:48,542 INFO L78 Accepts]: Start accepts. Automaton has 6239 states and 8457 transitions. Word has length 134 [2019-10-02 21:48:48,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 21:48:48,543 INFO L475 AbstractCegarLoop]: Abstraction has 6239 states and 8457 transitions. [2019-10-02 21:48:48,543 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-02 21:48:48,543 INFO L276 IsEmpty]: Start isEmpty. Operand 6239 states and 8457 transitions. [2019-10-02 21:48:48,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2019-10-02 21:48:48,545 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 21:48:48,545 INFO L411 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-02 21:48:48,545 INFO L418 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 21:48:48,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 21:48:48,546 INFO L82 PathProgramCache]: Analyzing trace with hash -1718542795, now seen corresponding path program 1 times [2019-10-02 21:48:48,546 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 21:48:48,550 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 21:48:48,551 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 21:48:48,551 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 21:48:48,551 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 21:48:48,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 21:48:48,719 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 20 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 21:48:48,720 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-02 21:48:48,720 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-10-02 21:48:48,721 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 142 with the following transitions: [2019-10-02 21:48:48,723 INFO L207 CegarAbsIntRunner]: [0], [1], [180], [187], [195], [203], [211], [219], [227], [235], [243], [251], [259], [267], [275], [283], [291], [299], [307], [315], [323], [331], [339], [347], [355], [363], [371], [379], [387], [395], [403], [411], [419], [427], [435], [443], [451], [459], [467], [475], [483], [487], [489], [492], [500], [508], [516], [524], [532], [540], [548], [556], [564], [572], [580], [588], [596], [604], [612], [620], [628], [636], [644], [652], [660], [668], [673], [677], [681], [685], [689], [693], [697], [701], [705], [709], [713], [717], [721], [725], [729], [733], [737], [741], [745], [749], [753], [757], [760], [1552], [1556], [1565], [1569], [1571], [1578], [1579], [1580], [1582], [1583] [2019-10-02 21:48:48,804 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-02 21:48:48,804 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-02 21:48:53,819 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-10-02 21:48:56,130 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-10-02 21:48:56,133 INFO L272 AbstractInterpreter]: Visited 98 different actions 191 times. Merged at 4 different actions 5 times. Never widened. Performed 444 root evaluator evaluations with a maximum evaluation depth of 14. Performed 444 inverse root evaluator evaluations with a maximum inverse evaluation depth of 14. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2019-10-02 21:48:56,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 21:48:56,141 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-10-02 21:48:58,225 INFO L227 lantSequenceWeakener]: Weakened 138 states. On average, predicates are now at 78.27% of their original sizes. [2019-10-02 21:48:58,225 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-10-02 21:48:58,292 INFO L420 sIntCurrentIteration]: We unified 140 AI predicates to 140 [2019-10-02 21:48:58,292 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-10-02 21:48:58,293 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-02 21:48:58,293 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [11] imperfect sequences [4] total 13 [2019-10-02 21:48:58,294 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 21:48:58,294 INFO L454 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-02 21:48:58,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-02 21:48:58,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2019-10-02 21:48:58,295 INFO L87 Difference]: Start difference. First operand 6239 states and 8457 transitions. Second operand 11 states.