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/Problem13_label16.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-112bae1 [2019-09-09 17:10:11,352 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-09 17:10:11,355 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-09 17:10:11,372 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-09-09 17:10:11,373 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-09-09 17:10:11,374 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-09-09 17:10:11,375 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-09-09 17:10:11,377 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-09-09 17:10:11,378 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-09-09 17:10:11,379 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-09-09 17:10:11,380 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-09-09 17:10:11,381 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-09-09 17:10:11,382 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-09 17:10:11,383 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-09 17:10:11,383 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-09 17:10:11,385 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-09 17:10:11,386 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-09 17:10:11,387 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-09 17:10:11,389 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-09 17:10:11,391 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-09 17:10:11,392 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-09 17:10:11,393 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-09 17:10:11,394 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-09 17:10:11,395 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-09 17:10:11,397 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-09-09 17:10:11,400 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-09-09 17:10:11,401 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-09-09 17:10:11,401 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-09-09 17:10:11,402 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-09-09 17:10:11,406 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-09-09 17:10:11,406 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-09-09 17:10:11,406 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-09-09 17:10:11,407 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-09-09 17:10:11,407 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-09 17:10:11,407 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-09 17:10:11,408 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-09 17:10:11,409 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/svcomp-Reach-32bit-Automizer_Default+AIv2_INT.epf [2019-09-09 17:10:11,424 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-09 17:10:11,424 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-09 17:10:11,424 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-09-09 17:10:11,425 INFO L138 SettingsManager]: * Log level for plugins=info [2019-09-09 17:10:11,425 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-09-09 17:10:11,426 INFO L138 SettingsManager]: * User list type=DISABLED [2019-09-09 17:10:11,426 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-09-09 17:10:11,426 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-09-09 17:10:11,426 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-09-09 17:10:11,426 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-09-09 17:10:11,427 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-09 17:10:11,427 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-09 17:10:11,427 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-09 17:10:11,428 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-09 17:10:11,428 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-09 17:10:11,428 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-09 17:10:11,429 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-09 17:10:11,429 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-09 17:10:11,429 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-09 17:10:11,430 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-09 17:10:11,430 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-09 17:10:11,430 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-09-09 17:10:11,430 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-09 17:10:11,430 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-09 17:10:11,431 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-09 17:10:11,431 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-09 17:10:11,431 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-09-09 17:10:11,432 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-09 17:10:11,432 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-09 17:10:11,432 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-09-09 17:10:11,478 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-09 17:10:11,490 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-09 17:10:11,493 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-09 17:10:11,495 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-09 17:10:11,496 INFO L275 PluginConnector]: CDTParser initialized [2019-09-09 17:10:11,497 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem13_label16.c [2019-09-09 17:10:11,575 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c95b2c8ce/157aebd5e6cb40e5ad188ce8fc2fd914/FLAGb79f06cd6 [2019-09-09 17:10:12,494 INFO L306 CDTParser]: Found 1 translation units. [2019-09-09 17:10:12,495 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem13_label16.c [2019-09-09 17:10:12,555 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c95b2c8ce/157aebd5e6cb40e5ad188ce8fc2fd914/FLAGb79f06cd6 [2019-09-09 17:10:12,957 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c95b2c8ce/157aebd5e6cb40e5ad188ce8fc2fd914 [2019-09-09 17:10:12,967 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-09 17:10:12,968 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-09 17:10:12,969 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-09 17:10:12,970 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-09 17:10:12,978 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-09 17:10:12,979 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 05:10:12" (1/1) ... [2019-09-09 17:10:12,982 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@50aede7e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 05:10:12, skipping insertion in model container [2019-09-09 17:10:12,982 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 05:10:12" (1/1) ... [2019-09-09 17:10:12,989 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-09 17:10:13,173 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-09 17:10:14,923 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 17:10:14,931 INFO L188 MainTranslator]: Completed pre-run [2019-09-09 17:10:15,731 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 17:10:15,763 INFO L192 MainTranslator]: Completed translation [2019-09-09 17:10:15,764 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 05:10:15 WrapperNode [2019-09-09 17:10:15,764 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-09 17:10:15,765 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-09 17:10:15,765 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-09 17:10:15,766 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-09 17:10:15,780 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 05:10:15" (1/1) ... [2019-09-09 17:10:15,783 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 05:10:15" (1/1) ... [2019-09-09 17:10:15,855 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 05:10:15" (1/1) ... [2019-09-09 17:10:15,856 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 05:10:15" (1/1) ... [2019-09-09 17:10:15,997 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 05:10:15" (1/1) ... [2019-09-09 17:10:16,037 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 05:10:15" (1/1) ... [2019-09-09 17:10:16,097 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 05:10:15" (1/1) ... [2019-09-09 17:10:16,159 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-09 17:10:16,160 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-09 17:10:16,160 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-09 17:10:16,160 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-09 17:10:16,162 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 05:10:15" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-09 17:10:16,228 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-09 17:10:16,228 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-09 17:10:16,228 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-09-09 17:10:16,228 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-09-09 17:10:16,228 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2019-09-09 17:10:16,228 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2019-09-09 17:10:16,229 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-09 17:10:16,229 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-09-09 17:10:16,229 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-09-09 17:10:16,229 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2019-09-09 17:10:16,229 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2019-09-09 17:10:16,229 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-09 17:10:16,230 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-09 17:10:16,230 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-09-09 17:10:16,230 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-09 17:10:16,230 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-09 17:10:16,230 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-09 17:10:22,837 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-09 17:10:22,838 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-09-09 17:10:22,841 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 05:10:22 BoogieIcfgContainer [2019-09-09 17:10:22,842 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-09 17:10:22,843 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-09 17:10:22,843 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-09 17:10:22,846 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-09 17:10:22,847 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.09 05:10:12" (1/3) ... [2019-09-09 17:10:22,848 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70d9ae9c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 05:10:22, skipping insertion in model container [2019-09-09 17:10:22,848 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 05:10:15" (2/3) ... [2019-09-09 17:10:22,848 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70d9ae9c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 05:10:22, skipping insertion in model container [2019-09-09 17:10:22,848 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 05:10:22" (3/3) ... [2019-09-09 17:10:22,850 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem13_label16.c [2019-09-09 17:10:22,860 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-09 17:10:22,870 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-09 17:10:22,888 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-09 17:10:22,919 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-09 17:10:22,920 INFO L378 AbstractCegarLoop]: Hoare is false [2019-09-09 17:10:22,920 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-09 17:10:22,920 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-09 17:10:22,920 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-09 17:10:22,920 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-09 17:10:22,920 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-09 17:10:22,921 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-09 17:10:22,980 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states. [2019-09-09 17:10:22,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-09-09 17:10:22,992 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 17:10:22,993 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-09 17:10:22,996 INFO L418 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 17:10:23,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 17:10:23,002 INFO L82 PathProgramCache]: Analyzing trace with hash -495994913, now seen corresponding path program 1 times [2019-09-09 17:10:23,004 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 17:10:23,058 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 17:10:23,058 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 17:10:23,059 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 17:10:23,059 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 17:10:23,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 17:10:23,351 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 17:10:23,353 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 17:10:23,353 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-09-09 17:10:23,354 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 17:10:23,359 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-09-09 17:10:23,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-09-09 17:10:23,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-09 17:10:23,378 INFO L87 Difference]: Start difference. First operand 1119 states. Second operand 4 states. [2019-09-09 17:10:33,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 17:10:33,043 INFO L93 Difference]: Finished difference Result 2851 states and 4840 transitions. [2019-09-09 17:10:33,048 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-09 17:10:33,050 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 28 [2019-09-09 17:10:33,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 17:10:33,092 INFO L225 Difference]: With dead ends: 2851 [2019-09-09 17:10:33,092 INFO L226 Difference]: Without dead ends: 2758 [2019-09-09 17:10:33,094 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-09 17:10:33,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2758 states. [2019-09-09 17:10:33,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2758 to 1919. [2019-09-09 17:10:33,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1919 states. [2019-09-09 17:10:33,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1919 states to 1919 states and 3313 transitions. [2019-09-09 17:10:33,246 INFO L78 Accepts]: Start accepts. Automaton has 1919 states and 3313 transitions. Word has length 28 [2019-09-09 17:10:33,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 17:10:33,247 INFO L475 AbstractCegarLoop]: Abstraction has 1919 states and 3313 transitions. [2019-09-09 17:10:33,247 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-09-09 17:10:33,247 INFO L276 IsEmpty]: Start isEmpty. Operand 1919 states and 3313 transitions. [2019-09-09 17:10:33,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2019-09-09 17:10:33,252 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 17:10:33,252 INFO L399 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-09 17:10:33,253 INFO L418 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 17:10:33,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 17:10:33,253 INFO L82 PathProgramCache]: Analyzing trace with hash -1299298521, now seen corresponding path program 1 times [2019-09-09 17:10:33,253 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 17:10:33,254 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 17:10:33,255 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 17:10:33,255 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 17:10:33,255 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 17:10:33,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 17:10:33,521 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 17:10:33,521 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 17:10:33,522 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-09-09 17:10:33,522 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 17:10:33,524 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-09 17:10:33,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-09 17:10:33,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-09-09 17:10:33,525 INFO L87 Difference]: Start difference. First operand 1919 states and 3313 transitions. Second operand 5 states. [2019-09-09 17:10:41,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 17:10:41,504 INFO L93 Difference]: Finished difference Result 3632 states and 5664 transitions. [2019-09-09 17:10:41,505 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-09 17:10:41,505 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 97 [2019-09-09 17:10:41,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 17:10:41,530 INFO L225 Difference]: With dead ends: 3632 [2019-09-09 17:10:41,531 INFO L226 Difference]: Without dead ends: 3632 [2019-09-09 17:10:41,532 INFO L628 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 [2019-09-09 17:10:41,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3632 states. [2019-09-09 17:10:41,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3632 to 3623. [2019-09-09 17:10:41,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3623 states. [2019-09-09 17:10:41,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3623 states to 3623 states and 5644 transitions. [2019-09-09 17:10:41,630 INFO L78 Accepts]: Start accepts. Automaton has 3623 states and 5644 transitions. Word has length 97 [2019-09-09 17:10:41,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 17:10:41,630 INFO L475 AbstractCegarLoop]: Abstraction has 3623 states and 5644 transitions. [2019-09-09 17:10:41,631 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-09 17:10:41,631 INFO L276 IsEmpty]: Start isEmpty. Operand 3623 states and 5644 transitions. [2019-09-09 17:10:41,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2019-09-09 17:10:41,633 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 17:10:41,633 INFO L399 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-09 17:10:41,634 INFO L418 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 17:10:41,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 17:10:41,634 INFO L82 PathProgramCache]: Analyzing trace with hash 199529859, now seen corresponding path program 1 times [2019-09-09 17:10:41,634 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 17:10:41,635 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 17:10:41,636 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 17:10:41,636 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 17:10:41,636 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 17:10:41,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 17:10:41,823 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 17:10:41,824 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 17:10:41,824 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-09-09 17:10:41,825 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 17:10:41,826 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-09 17:10:41,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-09 17:10:41,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-09-09 17:10:41,827 INFO L87 Difference]: Start difference. First operand 3623 states and 5644 transitions. Second operand 5 states. [2019-09-09 17:10:50,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 17:10:50,354 INFO L93 Difference]: Finished difference Result 7191 states and 10294 transitions. [2019-09-09 17:10:50,359 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-09-09 17:10:50,360 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 99 [2019-09-09 17:10:50,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 17:10:50,402 INFO L225 Difference]: With dead ends: 7191 [2019-09-09 17:10:50,403 INFO L226 Difference]: Without dead ends: 7191 [2019-09-09 17:10:50,411 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-09-09 17:10:50,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7191 states. [2019-09-09 17:10:50,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7191 to 7086. [2019-09-09 17:10:50,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7086 states. [2019-09-09 17:10:50,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7086 states to 7086 states and 10105 transitions. [2019-09-09 17:10:50,636 INFO L78 Accepts]: Start accepts. Automaton has 7086 states and 10105 transitions. Word has length 99 [2019-09-09 17:10:50,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 17:10:50,640 INFO L475 AbstractCegarLoop]: Abstraction has 7086 states and 10105 transitions. [2019-09-09 17:10:50,640 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-09 17:10:50,640 INFO L276 IsEmpty]: Start isEmpty. Operand 7086 states and 10105 transitions. [2019-09-09 17:10:50,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2019-09-09 17:10:50,649 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 17:10:50,649 INFO L399 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-09 17:10:50,650 INFO L418 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 17:10:50,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 17:10:50,650 INFO L82 PathProgramCache]: Analyzing trace with hash 1166979979, now seen corresponding path program 1 times [2019-09-09 17:10:50,650 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 17:10:50,651 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 17:10:50,652 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 17:10:50,652 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 17:10:50,652 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 17:10:50,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 17:10:50,832 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 17:10:50,832 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 17:10:50,832 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-09-09 17:10:50,832 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 17:10:50,834 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-09-09 17:10:50,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-09-09 17:10:50,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-09 17:10:50,835 INFO L87 Difference]: Start difference. First operand 7086 states and 10105 transitions. Second operand 4 states. [2019-09-09 17:10:59,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 17:10:59,405 INFO L93 Difference]: Finished difference Result 20364 states and 28234 transitions. [2019-09-09 17:10:59,406 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-09 17:10:59,406 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 143 [2019-09-09 17:10:59,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 17:10:59,502 INFO L225 Difference]: With dead ends: 20364 [2019-09-09 17:10:59,503 INFO L226 Difference]: Without dead ends: 20364 [2019-09-09 17:10:59,503 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-09 17:10:59,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20364 states. [2019-09-09 17:11:00,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20364 to 20326. [2019-09-09 17:11:00,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20326 states. [2019-09-09 17:11:00,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20326 states to 20326 states and 28115 transitions. [2019-09-09 17:11:00,072 INFO L78 Accepts]: Start accepts. Automaton has 20326 states and 28115 transitions. Word has length 143 [2019-09-09 17:11:00,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 17:11:00,074 INFO L475 AbstractCegarLoop]: Abstraction has 20326 states and 28115 transitions. [2019-09-09 17:11:00,074 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-09-09 17:11:00,074 INFO L276 IsEmpty]: Start isEmpty. Operand 20326 states and 28115 transitions. [2019-09-09 17:11:00,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2019-09-09 17:11:00,080 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 17:11:00,081 INFO L399 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-09 17:11:00,082 INFO L418 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 17:11:00,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 17:11:00,083 INFO L82 PathProgramCache]: Analyzing trace with hash 1396430161, now seen corresponding path program 1 times [2019-09-09 17:11:00,083 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 17:11:00,084 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 17:11:00,084 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 17:11:00,084 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 17:11:00,084 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 17:11:00,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 17:11:00,291 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 17:11:00,292 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 17:11:00,292 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-09-09 17:11:00,292 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 17:11:00,294 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-09-09 17:11:00,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-09-09 17:11:00,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-09 17:11:00,296 INFO L87 Difference]: Start difference. First operand 20326 states and 28115 transitions. Second operand 4 states. [2019-09-09 17:11:07,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 17:11:07,157 INFO L93 Difference]: Finished difference Result 24365 states and 30183 transitions. [2019-09-09 17:11:07,157 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-09 17:11:07,158 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 222 [2019-09-09 17:11:07,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 17:11:07,254 INFO L225 Difference]: With dead ends: 24365 [2019-09-09 17:11:07,254 INFO L226 Difference]: Without dead ends: 24365 [2019-09-09 17:11:07,255 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-09 17:11:07,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24365 states. [2019-09-09 17:11:07,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24365 to 24364. [2019-09-09 17:11:07,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24364 states. [2019-09-09 17:11:07,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24364 states to 24364 states and 30181 transitions. [2019-09-09 17:11:07,750 INFO L78 Accepts]: Start accepts. Automaton has 24364 states and 30181 transitions. Word has length 222 [2019-09-09 17:11:07,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 17:11:07,751 INFO L475 AbstractCegarLoop]: Abstraction has 24364 states and 30181 transitions. [2019-09-09 17:11:07,751 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-09-09 17:11:07,751 INFO L276 IsEmpty]: Start isEmpty. Operand 24364 states and 30181 transitions. [2019-09-09 17:11:07,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2019-09-09 17:11:07,763 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 17:11:07,763 INFO L399 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-09 17:11:07,764 INFO L418 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 17:11:07,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 17:11:07,764 INFO L82 PathProgramCache]: Analyzing trace with hash -1375892663, now seen corresponding path program 1 times [2019-09-09 17:11:07,764 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 17:11:07,768 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 17:11:07,768 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 17:11:07,768 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 17:11:07,769 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 17:11:07,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 17:11:08,268 INFO L134 CoverageAnalysis]: Checked inductivity of 309 backedges. 134 proven. 69 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2019-09-09 17:11:08,269 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-09 17:11:08,269 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-09 17:11:08,270 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 328 with the following transitions: [2019-09-09 17:11:08,275 INFO L207 CegarAbsIntRunner]: [0], [1], [2628], [2635], [2643], [2651], [2659], [2667], [2675], [2683], [2691], [2699], [2707], [2715], [2723], [2731], [2739], [2747], [2755], [2759], [2761], [2764], [2772], [2780], [2788], [2796], [2804], [2812], [2820], [2828], [2836], [2844], [2852], [2860], [2868], [2876], [2884], [2892], [2900], [2908], [2916], [2924], [2932], [2940], [2948], [2956], [2964], [2972], [2980], [2988], [2996], [3004], [3012], [3020], [3028], [3036], [3044], [3052], [3060], [3068], [3076], [3084], [3092], [3100], [3108], [3116], [3120], [3121], [3125], [3129], [3133], [3137], [3148], [3152], [3156], [3160], [3164], [3168], [3179], [3183], [3187], [3191], [3195], [3199], [3203], [3207], [3218], [3222], [3226], [3230], [3234], [3238], [3242], [3246], [3250], [3254], [3258], [3262], [3266], [3270], [3274], [3278], [3282], [3286], [3290], [3294], [3297], [3302], [3304], [3305], [3309], [3313], [3317], [3321], [3325], [3329], [3333], [3344], [3355], [3358], [3363], [3365], [4238], [4242], [4251], [4255], [4257], [4268], [4269], [4270], [4272], [4273] [2019-09-09 17:11:08,367 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-09 17:11:08,368 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-09 17:12:23,113 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-09-09 17:12:23,116 INFO L272 AbstractInterpreter]: Visited 124 different actions 124 times. Never merged. Never widened. Performed 165 root evaluator evaluations with a maximum evaluation depth of 17. Performed 165 inverse root evaluator evaluations with a maximum inverse evaluation depth of 17. Never found a fixpoint. Largest state had 26 variables. [2019-09-09 17:12:23,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 17:12:23,120 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-09-09 17:14:08,102 INFO L227 lantSequenceWeakener]: Weakened 311 states. On average, predicates are now at 70.85% of their original sizes. [2019-09-09 17:14:08,102 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-09-09 17:14:08,165 INFO L420 sIntCurrentIteration]: We unified 326 AI predicates to 326 [2019-09-09 17:14:08,165 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-09-09 17:14:08,166 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-09 17:14:08,167 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [8] imperfect sequences [6] total 12 [2019-09-09 17:14:08,167 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 17:14:08,167 INFO L454 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-09-09 17:14:08,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-09-09 17:14:08,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2019-09-09 17:14:08,168 INFO L87 Difference]: Start difference. First operand 24364 states and 30181 transitions. Second operand 8 states. [2019-09-09 17:16:47,123 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation.