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/Problem14_label09.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-673a906-m [2019-10-02 20:26:04,291 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-02 20:26:04,293 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-02 20:26:04,306 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-10-02 20:26:04,315 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-02 20:26:04,316 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-02 20:26:04,317 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-02 20:26:04,318 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-02 20:26:04,319 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-02 20:26:04,320 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-02 20:26:04,321 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-02 20:26:04,323 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-02 20:26:04,325 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-02 20:26:04,325 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-02 20:26:04,326 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-02 20:26:04,327 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-02 20:26:04,329 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-02 20:26:04,341 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 20:26:04,365 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-02 20:26:04,365 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-02 20:26:04,366 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-10-02 20:26:04,366 INFO L138 SettingsManager]: * Log level for plugins=info [2019-10-02 20:26:04,367 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-10-02 20:26:04,367 INFO L138 SettingsManager]: * User list type=DISABLED [2019-10-02 20:26:04,367 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-10-02 20:26:04,367 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-10-02 20:26:04,368 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-10-02 20:26:04,368 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-10-02 20:26:04,370 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-02 20:26:04,370 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-02 20:26:04,370 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-02 20:26:04,371 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-02 20:26:04,371 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-02 20:26:04,371 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-02 20:26:04,371 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-02 20:26:04,372 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-02 20:26:04,372 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-02 20:26:04,372 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-02 20:26:04,373 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-02 20:26:04,373 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-10-02 20:26:04,373 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-02 20:26:04,373 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-02 20:26:04,374 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-02 20:26:04,374 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-02 20:26:04,374 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-10-02 20:26:04,374 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-02 20:26:04,374 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-02 20:26:04,375 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-10-02 20:26:04,429 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-02 20:26:04,448 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-02 20:26:04,454 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-02 20:26:04,455 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-02 20:26:04,456 INFO L275 PluginConnector]: CDTParser initialized [2019-10-02 20:26:04,457 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem14_label09.c [2019-10-02 20:26:04,535 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eec2c92fd/09e9f9a45fae401c9f4c5deebfc3ebdf/FLAGb8f5c3be0 [2019-10-02 20:26:05,142 INFO L306 CDTParser]: Found 1 translation units. [2019-10-02 20:26:05,143 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem14_label09.c [2019-10-02 20:26:05,165 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eec2c92fd/09e9f9a45fae401c9f4c5deebfc3ebdf/FLAGb8f5c3be0 [2019-10-02 20:26:05,399 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eec2c92fd/09e9f9a45fae401c9f4c5deebfc3ebdf [2019-10-02 20:26:05,408 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-02 20:26:05,410 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-02 20:26:05,411 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-02 20:26:05,411 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-02 20:26:05,415 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-02 20:26:05,416 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.10 08:26:05" (1/1) ... [2019-10-02 20:26:05,420 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@193b1bbf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 08:26:05, skipping insertion in model container [2019-10-02 20:26:05,421 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.10 08:26:05" (1/1) ... [2019-10-02 20:26:05,428 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-02 20:26:05,485 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-02 20:26:06,097 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-02 20:26:06,103 INFO L188 MainTranslator]: Completed pre-run [2019-10-02 20:26:06,245 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-02 20:26:06,265 INFO L192 MainTranslator]: Completed translation [2019-10-02 20:26:06,266 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 08:26:06 WrapperNode [2019-10-02 20:26:06,266 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-02 20:26:06,267 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-02 20:26:06,267 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-02 20:26:06,268 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-02 20:26:06,289 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 08:26:06" (1/1) ... [2019-10-02 20:26:06,290 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 08:26:06" (1/1) ... [2019-10-02 20:26:06,320 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 08:26:06" (1/1) ... [2019-10-02 20:26:06,321 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 08:26:06" (1/1) ... [2019-10-02 20:26:06,392 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 08:26:06" (1/1) ... [2019-10-02 20:26:06,422 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 08:26:06" (1/1) ... [2019-10-02 20:26:06,438 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 08:26:06" (1/1) ... [2019-10-02 20:26:06,454 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-02 20:26:06,455 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-02 20:26:06,455 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-02 20:26:06,455 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-02 20:26:06,456 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 08:26:06" (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 20:26:06,565 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-02 20:26:06,565 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-02 20:26:06,565 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-02 20:26:06,566 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-02 20:26:06,566 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-02 20:26:06,566 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-02 20:26:06,567 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-02 20:26:06,567 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-02 20:26:06,567 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-02 20:26:06,567 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-02 20:26:06,568 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-02 20:26:08,195 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-02 20:26:08,195 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-02 20:26:08,197 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.10 08:26:08 BoogieIcfgContainer [2019-10-02 20:26:08,197 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-02 20:26:08,198 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-02 20:26:08,198 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-02 20:26:08,202 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-02 20:26:08,202 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.10 08:26:05" (1/3) ... [2019-10-02 20:26:08,203 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1afbeda0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.10 08:26:08, skipping insertion in model container [2019-10-02 20:26:08,203 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 08:26:06" (2/3) ... [2019-10-02 20:26:08,204 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1afbeda0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.10 08:26:08, skipping insertion in model container [2019-10-02 20:26:08,204 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.10 08:26:08" (3/3) ... [2019-10-02 20:26:08,206 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem14_label09.c [2019-10-02 20:26:08,216 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-02 20:26:08,225 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-02 20:26:08,242 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-02 20:26:08,273 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-10-02 20:26:08,274 INFO L378 AbstractCegarLoop]: Hoare is false [2019-10-02 20:26:08,274 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-02 20:26:08,274 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-02 20:26:08,275 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-02 20:26:08,275 INFO L382 AbstractCegarLoop]: Difference is false [2019-10-02 20:26:08,275 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-02 20:26:08,275 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-02 20:26:08,303 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states. [2019-10-02 20:26:08,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2019-10-02 20:26:08,316 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 20:26:08,317 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, 1] [2019-10-02 20:26:08,319 INFO L418 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 20:26:08,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 20:26:08,324 INFO L82 PathProgramCache]: Analyzing trace with hash 1524899170, now seen corresponding path program 1 times [2019-10-02 20:26:08,327 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 20:26:08,379 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 20:26:08,379 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 20:26:08,379 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 20:26:08,380 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 20:26:08,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 20:26:08,664 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 20:26:08,667 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 20:26:08,667 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-02 20:26:08,667 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 20:26:08,674 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-02 20:26:08,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-02 20:26:08,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-02 20:26:08,692 INFO L87 Difference]: Start difference. First operand 254 states. Second operand 4 states. [2019-10-02 20:26:10,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 20:26:10,699 INFO L93 Difference]: Finished difference Result 642 states and 895 transitions. [2019-10-02 20:26:10,700 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-02 20:26:10,701 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 51 [2019-10-02 20:26:10,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 20:26:10,722 INFO L225 Difference]: With dead ends: 642 [2019-10-02 20:26:10,722 INFO L226 Difference]: Without dead ends: 554 [2019-10-02 20:26:10,724 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 20:26:10,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 554 states. [2019-10-02 20:26:10,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 554 to 554. [2019-10-02 20:26:10,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 554 states. [2019-10-02 20:26:10,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 554 states to 554 states and 776 transitions. [2019-10-02 20:26:10,808 INFO L78 Accepts]: Start accepts. Automaton has 554 states and 776 transitions. Word has length 51 [2019-10-02 20:26:10,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 20:26:10,809 INFO L475 AbstractCegarLoop]: Abstraction has 554 states and 776 transitions. [2019-10-02 20:26:10,809 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-02 20:26:10,809 INFO L276 IsEmpty]: Start isEmpty. Operand 554 states and 776 transitions. [2019-10-02 20:26:10,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2019-10-02 20:26:10,819 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 20:26:10,820 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, 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] [2019-10-02 20:26:10,820 INFO L418 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 20:26:10,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 20:26:10,821 INFO L82 PathProgramCache]: Analyzing trace with hash 1193901298, now seen corresponding path program 1 times [2019-10-02 20:26:10,821 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 20:26:10,823 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 20:26:10,823 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 20:26:10,823 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 20:26:10,823 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 20:26:10,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 20:26:11,014 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 20:26:11,014 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 20:26:11,015 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-02 20:26:11,015 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 20:26:11,017 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-02 20:26:11,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-02 20:26:11,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-02 20:26:11,018 INFO L87 Difference]: Start difference. First operand 554 states and 776 transitions. Second operand 4 states. [2019-10-02 20:26:12,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 20:26:12,526 INFO L93 Difference]: Finished difference Result 1646 states and 2217 transitions. [2019-10-02 20:26:12,527 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-02 20:26:12,527 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 163 [2019-10-02 20:26:12,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 20:26:12,542 INFO L225 Difference]: With dead ends: 1646 [2019-10-02 20:26:12,542 INFO L226 Difference]: Without dead ends: 1646 [2019-10-02 20:26:12,543 INFO L640 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 [2019-10-02 20:26:12,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1646 states. [2019-10-02 20:26:12,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1646 to 1646. [2019-10-02 20:26:12,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1646 states. [2019-10-02 20:26:12,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1646 states to 1646 states and 2217 transitions. [2019-10-02 20:26:12,622 INFO L78 Accepts]: Start accepts. Automaton has 1646 states and 2217 transitions. Word has length 163 [2019-10-02 20:26:12,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 20:26:12,623 INFO L475 AbstractCegarLoop]: Abstraction has 1646 states and 2217 transitions. [2019-10-02 20:26:12,624 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-02 20:26:12,624 INFO L276 IsEmpty]: Start isEmpty. Operand 1646 states and 2217 transitions. [2019-10-02 20:26:12,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2019-10-02 20:26:12,641 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 20:26:12,642 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 20:26:12,642 INFO L418 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 20:26:12,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 20:26:12,643 INFO L82 PathProgramCache]: Analyzing trace with hash -825927574, now seen corresponding path program 1 times [2019-10-02 20:26:12,643 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 20:26:12,645 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 20:26:12,645 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 20:26:12,645 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 20:26:12,645 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 20:26:12,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 20:26:12,956 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 169 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 20:26:12,956 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-02 20:26:12,956 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-10-02 20:26:12,958 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 238 with the following transitions: [2019-10-02 20:26:12,960 INFO L207 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [289], [297], [305], [313], [317], [319], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [550], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [630], [948], [952], [961], [965], [967], [972], [973], [974], [976], [977] [2019-10-02 20:26:13,009 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-02 20:26:13,009 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-02 20:26:19,542 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-10-02 20:26:19,544 INFO L272 AbstractInterpreter]: Visited 108 different actions 108 times. Never merged. Never widened. Performed 255 root evaluator evaluations with a maximum evaluation depth of 13. Performed 255 inverse root evaluator evaluations with a maximum inverse evaluation depth of 13. Never found a fixpoint. Largest state had 24 variables. [2019-10-02 20:26:19,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 20:26:19,549 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-10-02 20:26:25,428 INFO L227 lantSequenceWeakener]: Weakened 218 states. On average, predicates are now at 78.09% of their original sizes. [2019-10-02 20:26:25,429 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-10-02 20:26:25,510 INFO L420 sIntCurrentIteration]: We unified 236 AI predicates to 236 [2019-10-02 20:26:25,510 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-10-02 20:26:25,511 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-02 20:26:25,511 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [10] imperfect sequences [6] total 14 [2019-10-02 20:26:25,512 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 20:26:25,512 INFO L454 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-02 20:26:25,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-02 20:26:25,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2019-10-02 20:26:25,513 INFO L87 Difference]: Start difference. First operand 1646 states and 2217 transitions. Second operand 10 states. [2019-10-02 20:27:42,248 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-10-02 20:29:03,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 20:29:03,488 INFO L93 Difference]: Finished difference Result 1832 states and 2414 transitions. [2019-10-02 20:29:03,488 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-02 20:29:03,488 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 237 [2019-10-02 20:29:03,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 20:29:03,498 INFO L225 Difference]: With dead ends: 1832 [2019-10-02 20:29:03,498 INFO L226 Difference]: Without dead ends: 1832 [2019-10-02 20:29:03,499 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 228 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2019-10-02 20:29:03,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1832 states. [2019-10-02 20:29:03,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1832 to 1828. [2019-10-02 20:29:03,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1828 states. [2019-10-02 20:29:03,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1828 states to 1828 states and 2407 transitions. [2019-10-02 20:29:03,550 INFO L78 Accepts]: Start accepts. Automaton has 1828 states and 2407 transitions. Word has length 237 [2019-10-02 20:29:03,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 20:29:03,551 INFO L475 AbstractCegarLoop]: Abstraction has 1828 states and 2407 transitions. [2019-10-02 20:29:03,551 INFO L476 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-02 20:29:03,552 INFO L276 IsEmpty]: Start isEmpty. Operand 1828 states and 2407 transitions. [2019-10-02 20:29:03,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 322 [2019-10-02 20:29:03,559 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 20:29:03,559 INFO L411 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 20:29:03,560 INFO L418 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 20:29:03,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 20:29:03,560 INFO L82 PathProgramCache]: Analyzing trace with hash 1455408002, now seen corresponding path program 1 times [2019-10-02 20:29:03,561 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 20:29:03,562 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 20:29:03,562 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 20:29:03,562 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 20:29:03,563 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 20:29:03,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 20:29:04,278 INFO L134 CoverageAnalysis]: Checked inductivity of 382 backedges. 217 proven. 161 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-02 20:29:04,279 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-02 20:29:04,279 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-10-02 20:29:04,279 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 322 with the following transitions: [2019-10-02 20:29:04,280 INFO L207 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [289], [297], [305], [313], [317], [319], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [550], [551], [554], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [630], [948], [952], [961], [965], [967], [972], [973], [974], [976], [977] [2019-10-02 20:29:04,285 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-02 20:29:04,286 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-02 20:29:11,283 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-10-02 20:29:11,285 INFO L272 AbstractInterpreter]: Visited 112 different actions 219 times. Merged at 4 different actions 5 times. Never widened. Performed 457 root evaluator evaluations with a maximum evaluation depth of 13. Performed 457 inverse root evaluator evaluations with a maximum inverse evaluation depth of 13. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2019-10-02 20:29:11,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 20:29:11,285 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-10-02 20:29:14,422 INFO L227 lantSequenceWeakener]: Weakened 318 states. On average, predicates are now at 77.76% of their original sizes. [2019-10-02 20:29:14,422 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-10-02 20:29:14,493 INFO L420 sIntCurrentIteration]: We unified 320 AI predicates to 320 [2019-10-02 20:29:14,493 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-10-02 20:29:14,493 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-02 20:29:14,494 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [11] imperfect sequences [12] total 21 [2019-10-02 20:29:14,494 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 20:29:14,495 INFO L454 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-02 20:29:14,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-02 20:29:14,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2019-10-02 20:29:14,496 INFO L87 Difference]: Start difference. First operand 1828 states and 2407 transitions. Second operand 11 states. [2019-10-02 20:29:45,768 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-10-02 20:30:12,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 20:30:12,891 INFO L93 Difference]: Finished difference Result 2044 states and 2633 transitions. [2019-10-02 20:30:12,891 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-02 20:30:12,892 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 321 [2019-10-02 20:30:12,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 20:30:12,902 INFO L225 Difference]: With dead ends: 2044 [2019-10-02 20:30:12,902 INFO L226 Difference]: Without dead ends: 2044 [2019-10-02 20:30:12,903 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 327 GetRequests, 311 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2019-10-02 20:30:12,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2044 states. [2019-10-02 20:30:12,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2044 to 1828. [2019-10-02 20:30:12,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1828 states. [2019-10-02 20:30:12,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1828 states to 1828 states and 2406 transitions. [2019-10-02 20:30:12,947 INFO L78 Accepts]: Start accepts. Automaton has 1828 states and 2406 transitions. Word has length 321 [2019-10-02 20:30:12,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 20:30:12,947 INFO L475 AbstractCegarLoop]: Abstraction has 1828 states and 2406 transitions. [2019-10-02 20:30:12,948 INFO L476 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-02 20:30:12,948 INFO L276 IsEmpty]: Start isEmpty. Operand 1828 states and 2406 transitions. [2019-10-02 20:30:12,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 348 [2019-10-02 20:30:12,955 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 20:30:12,956 INFO L411 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 20:30:12,956 INFO L418 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 20:30:12,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 20:30:12,956 INFO L82 PathProgramCache]: Analyzing trace with hash -54607594, now seen corresponding path program 1 times [2019-10-02 20:30:12,957 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 20:30:12,958 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 20:30:12,958 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 20:30:12,958 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 20:30:12,958 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 20:30:12,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 20:30:13,313 INFO L134 CoverageAnalysis]: Checked inductivity of 401 backedges. 189 proven. 159 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2019-10-02 20:30:13,313 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-02 20:30:13,313 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-10-02 20:30:13,314 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 348 with the following transitions: [2019-10-02 20:30:13,314 INFO L207 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [289], [297], [305], [313], [317], [319], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [550], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [630], [631], [635], [639], [643], [647], [651], [655], [658], [948], [952], [961], [965], [967], [972], [973], [974], [976], [977] [2019-10-02 20:30:13,319 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-02 20:30:13,319 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-02 20:30:26,961 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-10-02 20:30:26,961 INFO L272 AbstractInterpreter]: Visited 119 different actions 233 times. Merged at 4 different actions 5 times. Never widened. Performed 557 root evaluator evaluations with a maximum evaluation depth of 13. Performed 557 inverse root evaluator evaluations with a maximum inverse evaluation depth of 13. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2019-10-02 20:30:26,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 20:30:26,962 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-10-02 20:30:36,388 INFO L227 lantSequenceWeakener]: Weakened 344 states. On average, predicates are now at 77.72% of their original sizes. [2019-10-02 20:30:36,388 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-10-02 20:30:36,462 INFO L420 sIntCurrentIteration]: We unified 346 AI predicates to 346 [2019-10-02 20:30:36,463 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-10-02 20:30:36,463 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-02 20:30:36,463 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [11] imperfect sequences [8] total 17 [2019-10-02 20:30:36,463 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 20:30:36,464 INFO L454 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-02 20:30:36,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-02 20:30:36,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2019-10-02 20:30:36,465 INFO L87 Difference]: Start difference. First operand 1828 states and 2406 transitions. Second operand 11 states. [2019-10-02 20:31:16,636 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-10-02 20:32:26,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 20:32:26,648 INFO L93 Difference]: Finished difference Result 2196 states and 2796 transitions. [2019-10-02 20:32:26,648 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-10-02 20:32:26,648 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 347 [2019-10-02 20:32:26,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 20:32:26,659 INFO L225 Difference]: With dead ends: 2196 [2019-10-02 20:32:26,659 INFO L226 Difference]: Without dead ends: 2196 [2019-10-02 20:32:26,660 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 354 GetRequests, 337 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=83, Invalid=259, Unknown=0, NotChecked=0, Total=342 [2019-10-02 20:32:26,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2196 states. [2019-10-02 20:32:26,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2196 to 2194. [2019-10-02 20:32:26,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2194 states. [2019-10-02 20:32:26,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2194 states to 2194 states and 2794 transitions. [2019-10-02 20:32:26,709 INFO L78 Accepts]: Start accepts. Automaton has 2194 states and 2794 transitions. Word has length 347 [2019-10-02 20:32:26,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 20:32:26,710 INFO L475 AbstractCegarLoop]: Abstraction has 2194 states and 2794 transitions. [2019-10-02 20:32:26,710 INFO L476 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-02 20:32:26,710 INFO L276 IsEmpty]: Start isEmpty. Operand 2194 states and 2794 transitions. [2019-10-02 20:32:26,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 374 [2019-10-02 20:32:26,719 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 20:32:26,719 INFO L411 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 20:32:26,720 INFO L418 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 20:32:26,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 20:32:26,720 INFO L82 PathProgramCache]: Analyzing trace with hash -220106942, now seen corresponding path program 1 times [2019-10-02 20:32:26,720 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 20:32:26,721 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 20:32:26,722 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 20:32:26,722 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 20:32:26,722 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 20:32:26,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 20:32:27,115 INFO L134 CoverageAnalysis]: Checked inductivity of 447 backedges. 268 proven. 111 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2019-10-02 20:32:27,116 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-02 20:32:27,116 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-10-02 20:32:27,116 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 374 with the following transitions: [2019-10-02 20:32:27,116 INFO L207 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [289], [297], [305], [313], [317], [319], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [630], [631], [635], [639], [643], [647], [651], [654], [655], [658], [948], [952], [961], [965], [967], [972], [973], [974], [976], [977] [2019-10-02 20:32:27,120 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-02 20:32:27,120 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-02 20:32:40,065 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-10-02 20:33:23,161 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-10-02 20:33:23,162 INFO L272 AbstractInterpreter]: Visited 119 different actions 696 times. Merged at 6 different actions 32 times. Widened at 1 different actions 1 times. Performed 1687 root evaluator evaluations with a maximum evaluation depth of 22. Performed 1687 inverse root evaluator evaluations with a maximum inverse evaluation depth of 22. Found 6 fixpoints after 2 different actions. Largest state had 24 variables. [2019-10-02 20:33:23,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 20:33:23,162 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-10-02 20:33:39,594 INFO L227 lantSequenceWeakener]: Weakened 370 states. On average, predicates are now at 77.69% of their original sizes. [2019-10-02 20:33:39,594 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-10-02 20:33:39,667 INFO L420 sIntCurrentIteration]: We unified 372 AI predicates to 372 [2019-10-02 20:33:39,667 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-10-02 20:33:39,667 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-02 20:33:39,667 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [10] imperfect sequences [7] total 15 [2019-10-02 20:33:39,668 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 20:33:39,668 INFO L454 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-02 20:33:39,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-02 20:33:39,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2019-10-02 20:33:39,669 INFO L87 Difference]: Start difference. First operand 2194 states and 2794 transitions. Second operand 10 states. [2019-10-02 20:36:37,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 20:36:37,900 INFO L93 Difference]: Finished difference Result 2567 states and 3226 transitions. [2019-10-02 20:36:37,901 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-10-02 20:36:37,901 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 373 [2019-10-02 20:36:37,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 20:36:37,916 INFO L225 Difference]: With dead ends: 2567 [2019-10-02 20:36:37,916 INFO L226 Difference]: Without dead ends: 2567 [2019-10-02 20:36:37,917 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 380 GetRequests, 364 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2019-10-02 20:36:37,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2567 states. [2019-10-02 20:36:37,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2567 to 2562. [2019-10-02 20:36:37,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2562 states. [2019-10-02 20:36:37,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2562 states to 2562 states and 3221 transitions. [2019-10-02 20:36:37,974 INFO L78 Accepts]: Start accepts. Automaton has 2562 states and 3221 transitions. Word has length 373 [2019-10-02 20:36:37,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 20:36:37,975 INFO L475 AbstractCegarLoop]: Abstraction has 2562 states and 3221 transitions. [2019-10-02 20:36:37,975 INFO L476 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-02 20:36:37,975 INFO L276 IsEmpty]: Start isEmpty. Operand 2562 states and 3221 transitions. [2019-10-02 20:36:37,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 432 [2019-10-02 20:36:37,987 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 20:36:37,988 INFO L411 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 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] [2019-10-02 20:36:37,988 INFO L418 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 20:36:37,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 20:36:37,989 INFO L82 PathProgramCache]: Analyzing trace with hash 68469294, now seen corresponding path program 1 times [2019-10-02 20:36:37,989 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 20:36:37,990 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 20:36:37,990 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 20:36:37,991 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 20:36:37,991 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 20:36:38,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 20:36:38,326 INFO L134 CoverageAnalysis]: Checked inductivity of 696 backedges. 266 proven. 184 refuted. 0 times theorem prover too weak. 246 trivial. 0 not checked. [2019-10-02 20:36:38,326 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-02 20:36:38,326 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-10-02 20:36:38,327 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 432 with the following transitions: [2019-10-02 20:36:38,328 INFO L207 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [289], [297], [305], [313], [317], [319], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [550], [551], [554], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [630], [631], [635], [639], [643], [647], [651], [655], [658], [948], [952], [961], [965], [967], [972], [973], [974], [976], [977] [2019-10-02 20:36:38,331 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-02 20:36:38,332 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-02 20:36:52,356 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-10-02 20:36:52,357 INFO L272 AbstractInterpreter]: Visited 120 different actions 357 times. Merged at 6 different actions 17 times. Never widened. Performed 652 root evaluator evaluations with a maximum evaluation depth of 13. Performed 652 inverse root evaluator evaluations with a maximum inverse evaluation depth of 13. Found 4 fixpoints after 3 different actions. Largest state had 24 variables. [2019-10-02 20:36:52,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 20:36:52,357 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-10-02 20:36:56,824 INFO L227 lantSequenceWeakener]: Weakened 428 states. On average, predicates are now at 77.65% of their original sizes. [2019-10-02 20:36:56,824 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-10-02 20:36:56,895 INFO L420 sIntCurrentIteration]: We unified 430 AI predicates to 430 [2019-10-02 20:36:56,896 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-10-02 20:36:56,896 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-02 20:36:56,897 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [10] imperfect sequences [6] total 14 [2019-10-02 20:36:56,897 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 20:36:56,897 INFO L454 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-02 20:36:56,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-02 20:36:56,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2019-10-02 20:36:56,898 INFO L87 Difference]: Start difference. First operand 2562 states and 3221 transitions. Second operand 10 states. [2019-10-02 20:37:31,526 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-10-02 20:38:03,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 20:38:03,777 INFO L93 Difference]: Finished difference Result 2937 states and 3624 transitions. [2019-10-02 20:38:03,777 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-02 20:38:03,777 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 431 [2019-10-02 20:38:03,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 20:38:03,792 INFO L225 Difference]: With dead ends: 2937 [2019-10-02 20:38:03,792 INFO L226 Difference]: Without dead ends: 2937 [2019-10-02 20:38:03,793 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 437 GetRequests, 422 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2019-10-02 20:38:03,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2937 states. [2019-10-02 20:38:03,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2937 to 2750. [2019-10-02 20:38:03,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2750 states. [2019-10-02 20:38:03,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2750 states to 2750 states and 3422 transitions. [2019-10-02 20:38:03,845 INFO L78 Accepts]: Start accepts. Automaton has 2750 states and 3422 transitions. Word has length 431 [2019-10-02 20:38:03,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 20:38:03,846 INFO L475 AbstractCegarLoop]: Abstraction has 2750 states and 3422 transitions. [2019-10-02 20:38:03,846 INFO L476 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-02 20:38:03,846 INFO L276 IsEmpty]: Start isEmpty. Operand 2750 states and 3422 transitions. [2019-10-02 20:38:03,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 458 [2019-10-02 20:38:03,853 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 20:38:03,854 INFO L411 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 20:38:03,854 INFO L418 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 20:38:03,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 20:38:03,855 INFO L82 PathProgramCache]: Analyzing trace with hash 595553962, now seen corresponding path program 1 times [2019-10-02 20:38:03,855 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 20:38:03,856 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 20:38:03,856 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 20:38:03,856 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 20:38:03,856 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 20:38:03,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 20:38:04,224 INFO L134 CoverageAnalysis]: Checked inductivity of 743 backedges. 470 proven. 2 refuted. 0 times theorem prover too weak. 271 trivial. 0 not checked. [2019-10-02 20:38:04,225 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-02 20:38:04,225 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-10-02 20:38:04,225 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 458 with the following transitions: [2019-10-02 20:38:04,226 INFO L207 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [289], [297], [305], [313], [317], [319], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [554], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [630], [631], [635], [639], [643], [647], [651], [654], [655], [658], [948], [952], [961], [965], [967], [972], [973], [974], [976], [977] [2019-10-02 20:38:04,230 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-02 20:38:04,230 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-02 20:38:18,380 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-10-02 20:38:48,364 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-10-02 20:38:48,364 INFO L272 AbstractInterpreter]: Visited 120 different actions 715 times. Merged at 7 different actions 45 times. Widened at 1 different actions 1 times. Performed 1411 root evaluator evaluations with a maximum evaluation depth of 22. Performed 1411 inverse root evaluator evaluations with a maximum inverse evaluation depth of 22. Found 11 fixpoints after 3 different actions. Largest state had 24 variables. [2019-10-02 20:38:48,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 20:38:48,364 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-10-02 20:39:03,872 INFO L227 lantSequenceWeakener]: Weakened 454 states. On average, predicates are now at 77.63% of their original sizes. [2019-10-02 20:39:03,873 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-10-02 20:39:03,963 INFO L420 sIntCurrentIteration]: We unified 456 AI predicates to 456 [2019-10-02 20:39:03,963 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-10-02 20:39:03,964 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-02 20:39:03,964 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [10] imperfect sequences [6] total 14 [2019-10-02 20:39:03,964 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 20:39:03,965 INFO L454 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-02 20:39:03,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-02 20:39:03,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2019-10-02 20:39:03,966 INFO L87 Difference]: Start difference. First operand 2750 states and 3422 transitions. Second operand 10 states.