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/Problem19_label26.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-112bae1 [2019-09-09 23:17:28,973 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-09 23:17:28,975 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-09 23:17:28,988 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-09-09 23:17:28,988 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-09-09 23:17:28,989 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-09-09 23:17:28,990 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-09-09 23:17:28,992 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-09-09 23:17:28,994 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-09-09 23:17:28,995 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-09-09 23:17:28,996 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-09-09 23:17:28,997 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-09-09 23:17:28,997 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-09 23:17:28,998 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-09 23:17:28,999 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-09 23:17:29,000 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-09 23:17:29,001 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-09 23:17:29,002 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-09 23:17:29,003 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-09 23:17:29,005 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-09 23:17:29,006 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-09 23:17:29,007 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-09 23:17:29,008 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-09 23:17:29,009 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-09 23:17:29,011 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-09-09 23:17:29,013 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-09-09 23:17:29,014 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-09-09 23:17:29,015 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-09-09 23:17:29,015 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-09-09 23:17:29,016 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-09-09 23:17:29,016 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-09-09 23:17:29,017 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-09-09 23:17:29,017 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-09-09 23:17:29,018 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-09 23:17:29,018 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-09 23:17:29,019 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-09 23:17:29,020 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 23:17:29,034 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-09 23:17:29,034 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-09 23:17:29,035 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-09-09 23:17:29,035 INFO L138 SettingsManager]: * Log level for plugins=info [2019-09-09 23:17:29,036 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-09-09 23:17:29,036 INFO L138 SettingsManager]: * User list type=DISABLED [2019-09-09 23:17:29,036 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-09-09 23:17:29,036 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-09-09 23:17:29,036 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-09-09 23:17:29,036 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-09-09 23:17:29,037 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-09 23:17:29,037 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-09 23:17:29,037 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-09 23:17:29,038 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-09 23:17:29,038 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-09 23:17:29,038 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-09 23:17:29,038 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-09 23:17:29,038 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-09 23:17:29,039 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-09 23:17:29,039 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-09 23:17:29,039 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-09 23:17:29,039 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-09-09 23:17:29,039 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-09 23:17:29,040 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-09 23:17:29,040 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-09 23:17:29,040 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-09 23:17:29,040 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-09-09 23:17:29,040 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-09 23:17:29,041 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-09 23:17:29,041 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-09-09 23:17:29,070 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-09 23:17:29,083 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-09 23:17:29,087 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-09 23:17:29,089 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-09 23:17:29,089 INFO L275 PluginConnector]: CDTParser initialized [2019-09-09 23:17:29,090 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem19_label26.c [2019-09-09 23:17:29,152 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a8c575045/9a6751bf813c4ba1a986bef8193f7e8b/FLAGe146b2b85 [2019-09-09 23:17:30,033 INFO L306 CDTParser]: Found 1 translation units. [2019-09-09 23:17:30,034 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem19_label26.c [2019-09-09 23:17:30,085 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a8c575045/9a6751bf813c4ba1a986bef8193f7e8b/FLAGe146b2b85 [2019-09-09 23:17:30,507 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a8c575045/9a6751bf813c4ba1a986bef8193f7e8b [2019-09-09 23:17:30,517 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-09 23:17:30,519 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-09 23:17:30,520 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-09 23:17:30,521 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-09 23:17:30,525 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-09 23:17:30,526 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 11:17:30" (1/1) ... [2019-09-09 23:17:30,529 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2fbe1c36 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 11:17:30, skipping insertion in model container [2019-09-09 23:17:30,529 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 11:17:30" (1/1) ... [2019-09-09 23:17:30,537 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-09 23:17:30,768 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-09 23:17:33,224 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 23:17:33,235 INFO L188 MainTranslator]: Completed pre-run [2019-09-09 23:17:34,355 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 23:17:34,403 INFO L192 MainTranslator]: Completed translation [2019-09-09 23:17:34,404 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 11:17:34 WrapperNode [2019-09-09 23:17:34,404 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-09 23:17:34,405 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-09 23:17:34,405 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-09 23:17:34,406 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-09 23:17:34,420 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 11:17:34" (1/1) ... [2019-09-09 23:17:34,421 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 11:17:34" (1/1) ... [2019-09-09 23:17:34,513 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 11:17:34" (1/1) ... [2019-09-09 23:17:34,514 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 11:17:34" (1/1) ... [2019-09-09 23:17:34,680 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 11:17:34" (1/1) ... [2019-09-09 23:17:34,748 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 11:17:34" (1/1) ... [2019-09-09 23:17:34,810 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 11:17:34" (1/1) ... [2019-09-09 23:17:34,909 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-09 23:17:34,909 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-09 23:17:34,910 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-09 23:17:34,910 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-09 23:17:34,911 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 11:17:34" (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 23:17:34,996 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-09 23:17:34,996 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-09 23:17:34,996 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-09-09 23:17:34,996 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-09-09 23:17:34,997 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2019-09-09 23:17:34,997 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2019-09-09 23:17:34,998 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output5 [2019-09-09 23:17:34,998 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output6 [2019-09-09 23:17:34,998 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-09 23:17:34,998 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-09-09 23:17:35,000 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-09-09 23:17:35,001 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2019-09-09 23:17:35,001 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2019-09-09 23:17:35,002 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output5 [2019-09-09 23:17:35,002 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output6 [2019-09-09 23:17:35,003 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-09 23:17:35,003 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-09 23:17:35,003 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-09-09 23:17:35,003 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-09 23:17:35,004 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-09 23:17:35,004 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-09 23:17:45,250 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-09 23:17:45,251 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-09-09 23:17:45,255 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 11:17:45 BoogieIcfgContainer [2019-09-09 23:17:45,255 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-09 23:17:45,260 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-09 23:17:45,260 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-09 23:17:45,265 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-09 23:17:45,266 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.09 11:17:30" (1/3) ... [2019-09-09 23:17:45,267 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3bdc499c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 11:17:45, skipping insertion in model container [2019-09-09 23:17:45,267 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 11:17:34" (2/3) ... [2019-09-09 23:17:45,268 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3bdc499c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 11:17:45, skipping insertion in model container [2019-09-09 23:17:45,268 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 11:17:45" (3/3) ... [2019-09-09 23:17:45,280 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem19_label26.c [2019-09-09 23:17:45,295 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-09 23:17:45,308 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-09 23:17:45,325 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-09 23:17:45,356 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-09 23:17:45,357 INFO L378 AbstractCegarLoop]: Hoare is false [2019-09-09 23:17:45,357 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-09 23:17:45,357 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-09 23:17:45,357 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-09 23:17:45,357 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-09 23:17:45,357 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-09 23:17:45,358 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-09 23:17:45,407 INFO L276 IsEmpty]: Start isEmpty. Operand 1777 states. [2019-09-09 23:17:45,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-09-09 23:17:45,420 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 23:17:45,421 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-09 23:17:45,423 INFO L418 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 23:17:45,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 23:17:45,429 INFO L82 PathProgramCache]: Analyzing trace with hash 2022464298, now seen corresponding path program 1 times [2019-09-09 23:17:45,431 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 23:17:45,472 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 23:17:45,473 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 23:17:45,473 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 23:17:45,473 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 23:17:45,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 23:17:45,701 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 23:17:45,703 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 23:17:45,703 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-09 23:17:45,704 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 23:17:45,709 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-09 23:17:45,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-09 23:17:45,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-09 23:17:45,727 INFO L87 Difference]: Start difference. First operand 1777 states. Second operand 3 states. [2019-09-09 23:17:58,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 23:17:58,171 INFO L93 Difference]: Finished difference Result 3268 states and 6028 transitions. [2019-09-09 23:17:58,171 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-09 23:17:58,172 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 32 [2019-09-09 23:17:58,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 23:17:58,221 INFO L225 Difference]: With dead ends: 3268 [2019-09-09 23:17:58,221 INFO L226 Difference]: Without dead ends: 3200 [2019-09-09 23:17:58,223 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-09 23:17:58,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3200 states. [2019-09-09 23:17:58,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3200 to 3152. [2019-09-09 23:17:58,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3152 states. [2019-09-09 23:17:58,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3152 states to 3152 states and 5815 transitions. [2019-09-09 23:17:58,411 INFO L78 Accepts]: Start accepts. Automaton has 3152 states and 5815 transitions. Word has length 32 [2019-09-09 23:17:58,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 23:17:58,411 INFO L475 AbstractCegarLoop]: Abstraction has 3152 states and 5815 transitions. [2019-09-09 23:17:58,412 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-09 23:17:58,412 INFO L276 IsEmpty]: Start isEmpty. Operand 3152 states and 5815 transitions. [2019-09-09 23:17:58,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2019-09-09 23:17:58,418 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 23:17:58,418 INFO L399 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:17:58,419 INFO L418 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 23:17:58,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 23:17:58,419 INFO L82 PathProgramCache]: Analyzing trace with hash 35358019, now seen corresponding path program 1 times [2019-09-09 23:17:58,420 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 23:17:58,421 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 23:17:58,421 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 23:17:58,421 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 23:17:58,421 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 23:17:58,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 23:17:58,706 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 23:17:58,706 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 23:17:58,707 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-09-09 23:17:58,707 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 23:17:58,709 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-09 23:17:58,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-09 23:17:58,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-09-09 23:17:58,710 INFO L87 Difference]: Start difference. First operand 3152 states and 5815 transitions. Second operand 5 states. [2019-09-09 23:18:14,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 23:18:14,794 INFO L93 Difference]: Finished difference Result 6281 states and 9846 transitions. [2019-09-09 23:18:14,801 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-09-09 23:18:14,801 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 131 [2019-09-09 23:18:14,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 23:18:14,836 INFO L225 Difference]: With dead ends: 6281 [2019-09-09 23:18:14,836 INFO L226 Difference]: Without dead ends: 6281 [2019-09-09 23:18:14,837 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-09-09 23:18:14,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6281 states. [2019-09-09 23:18:15,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6281 to 6220. [2019-09-09 23:18:15,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6220 states. [2019-09-09 23:18:15,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6220 states to 6220 states and 9753 transitions. [2019-09-09 23:18:15,027 INFO L78 Accepts]: Start accepts. Automaton has 6220 states and 9753 transitions. Word has length 131 [2019-09-09 23:18:15,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 23:18:15,033 INFO L475 AbstractCegarLoop]: Abstraction has 6220 states and 9753 transitions. [2019-09-09 23:18:15,033 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-09 23:18:15,034 INFO L276 IsEmpty]: Start isEmpty. Operand 6220 states and 9753 transitions. [2019-09-09 23:18:15,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2019-09-09 23:18:15,040 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 23:18:15,041 INFO L399 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:18:15,041 INFO L418 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 23:18:15,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 23:18:15,042 INFO L82 PathProgramCache]: Analyzing trace with hash 1410748719, now seen corresponding path program 1 times [2019-09-09 23:18:15,042 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 23:18:15,043 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 23:18:15,043 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 23:18:15,044 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 23:18:15,044 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 23:18:15,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 23:18:15,268 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 23:18:15,268 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 23:18:15,269 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-09-09 23:18:15,269 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 23:18:15,270 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-09 23:18:15,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-09 23:18:15,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-09-09 23:18:15,271 INFO L87 Difference]: Start difference. First operand 6220 states and 9753 transitions. Second operand 6 states. [2019-09-09 23:18:30,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 23:18:30,063 INFO L93 Difference]: Finished difference Result 12457 states and 18681 transitions. [2019-09-09 23:18:30,067 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-09-09 23:18:30,068 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 141 [2019-09-09 23:18:30,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 23:18:30,124 INFO L225 Difference]: With dead ends: 12457 [2019-09-09 23:18:30,124 INFO L226 Difference]: Without dead ends: 12457 [2019-09-09 23:18:30,125 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2019-09-09 23:18:30,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12457 states. [2019-09-09 23:18:30,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12457 to 12227. [2019-09-09 23:18:30,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12227 states. [2019-09-09 23:18:30,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12227 states to 12227 states and 18319 transitions. [2019-09-09 23:18:30,487 INFO L78 Accepts]: Start accepts. Automaton has 12227 states and 18319 transitions. Word has length 141 [2019-09-09 23:18:30,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 23:18:30,489 INFO L475 AbstractCegarLoop]: Abstraction has 12227 states and 18319 transitions. [2019-09-09 23:18:30,489 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-09 23:18:30,489 INFO L276 IsEmpty]: Start isEmpty. Operand 12227 states and 18319 transitions. [2019-09-09 23:18:30,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2019-09-09 23:18:30,500 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 23:18:30,501 INFO L399 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:18:30,501 INFO L418 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 23:18:30,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 23:18:30,502 INFO L82 PathProgramCache]: Analyzing trace with hash 1402186938, now seen corresponding path program 1 times [2019-09-09 23:18:30,502 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 23:18:30,504 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 23:18:30,504 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 23:18:30,504 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 23:18:30,504 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 23:18:30,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 23:18:30,782 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 23:18:30,783 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 23:18:30,783 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-09-09 23:18:30,783 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 23:18:30,784 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-09 23:18:30,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-09 23:18:30,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-09-09 23:18:30,785 INFO L87 Difference]: Start difference. First operand 12227 states and 18319 transitions. Second operand 6 states. [2019-09-09 23:18:45,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 23:18:45,948 INFO L93 Difference]: Finished difference Result 24422 states and 36399 transitions. [2019-09-09 23:18:45,952 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-09 23:18:45,953 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 196 [2019-09-09 23:18:45,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 23:18:46,043 INFO L225 Difference]: With dead ends: 24422 [2019-09-09 23:18:46,043 INFO L226 Difference]: Without dead ends: 24422 [2019-09-09 23:18:46,043 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-09-09 23:18:46,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24422 states. [2019-09-09 23:18:46,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24422 to 24022. [2019-09-09 23:18:46,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24022 states. [2019-09-09 23:18:46,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24022 states to 24022 states and 35393 transitions. [2019-09-09 23:18:46,543 INFO L78 Accepts]: Start accepts. Automaton has 24022 states and 35393 transitions. Word has length 196 [2019-09-09 23:18:46,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 23:18:46,546 INFO L475 AbstractCegarLoop]: Abstraction has 24022 states and 35393 transitions. [2019-09-09 23:18:46,546 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-09 23:18:46,546 INFO L276 IsEmpty]: Start isEmpty. Operand 24022 states and 35393 transitions. [2019-09-09 23:18:46,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2019-09-09 23:18:46,549 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 23:18:46,550 INFO L399 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:18:46,550 INFO L418 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 23:18:46,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 23:18:46,551 INFO L82 PathProgramCache]: Analyzing trace with hash -881976424, now seen corresponding path program 1 times [2019-09-09 23:18:46,551 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 23:18:46,552 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 23:18:46,552 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 23:18:46,552 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 23:18:46,552 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 23:18:46,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 23:18:46,887 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 23:18:46,888 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 23:18:46,888 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-09-09 23:18:46,888 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 23:18:46,888 INFO L454 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-09-09 23:18:46,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-09-09 23:18:46,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2019-09-09 23:18:46,889 INFO L87 Difference]: Start difference. First operand 24022 states and 35393 transitions. Second operand 7 states. [2019-09-09 23:19:17,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 23:19:17,725 INFO L93 Difference]: Finished difference Result 67308 states and 99596 transitions. [2019-09-09 23:19:17,726 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-09-09 23:19:17,726 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 248 [2019-09-09 23:19:17,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 23:19:17,994 INFO L225 Difference]: With dead ends: 67308 [2019-09-09 23:19:17,994 INFO L226 Difference]: Without dead ends: 67308 [2019-09-09 23:19:17,995 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2019-09-09 23:19:18,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67308 states. [2019-09-09 23:19:19,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67308 to 65277. [2019-09-09 23:19:19,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65277 states. [2019-09-09 23:19:19,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65277 states to 65277 states and 93536 transitions. [2019-09-09 23:19:19,646 INFO L78 Accepts]: Start accepts. Automaton has 65277 states and 93536 transitions. Word has length 248 [2019-09-09 23:19:19,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 23:19:19,646 INFO L475 AbstractCegarLoop]: Abstraction has 65277 states and 93536 transitions. [2019-09-09 23:19:19,647 INFO L476 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-09-09 23:19:19,647 INFO L276 IsEmpty]: Start isEmpty. Operand 65277 states and 93536 transitions. [2019-09-09 23:19:19,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 735 [2019-09-09 23:19:19,669 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 23:19:19,671 INFO L399 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:19:19,671 INFO L418 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 23:19:19,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 23:19:19,672 INFO L82 PathProgramCache]: Analyzing trace with hash -177928971, now seen corresponding path program 1 times [2019-09-09 23:19:19,672 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 23:19:19,674 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 23:19:19,674 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 23:19:19,674 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 23:19:19,674 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 23:19:19,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 23:19:21,241 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 262 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 23:19:21,242 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-09 23:19:21,242 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-09 23:19:21,245 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 735 with the following transitions: [2019-09-09 23:19:21,253 INFO L207 CegarAbsIntRunner]: [0], [1], [4196], [4200], [4204], [4208], [4212], [4216], [4220], [4224], [4228], [4232], [4236], [4240], [4244], [4248], [4252], [4256], [4260], [4264], [4268], [4279], [4290], [4294], [4298], [4309], [4313], [4317], [4321], [4325], [4329], [4333], [4337], [4341], [4345], [4349], [4353], [4357], [4361], [4365], [4369], [4373], [4377], [4381], [4385], [4396], [4400], [4404], [4408], [4412], [4416], [4420], [4431], [4435], [4439], [4443], [4454], [4458], [4462], [4466], [4470], [4474], [4478], [4482], [4486], [4490], [4494], [4498], [4502], [4506], [4510], [4514], [4518], [4522], [4526], [4530], [4534], [4538], [4542], [4553], [4557], [4561], [4565], [4569], [4573], [4577], [4581], [4585], [4589], [4593], [4597], [4601], [4605], [4609], [4620], [4624], [4628], [4632], [4636], [4647], [4651], [4655], [4659], [4663], [4667], [4671], [4675], [4679], [4690], [4694], [4698], [4709], [4713], [4717], [4721], [4725], [4729], [4733], [4737], [4741], [4745], [4749], [4753], [4764], [4768], [4772], [4776], [4780], [4784], [4788], [4792], [4803], [4807], [4811], [4815], [4819], [4823], [4827], [4831], [4835], [4839], [4843], [4847], [4858], [4862], [4873], [4877], [4881], [4885], [4896], [4900], [4904], [4908], [4912], [4916], [4920], [4924], [4935], [4939], [4943], [4954], [4958], [4962], [4966], [4970], [4974], [4978], [4982], [4986], [4990], [4994], [4998], [5002], [5006], [5010], [5014], [5018], [5022], [5026], [5030], [5034], [5038], [5042], [5046], [5050], [5054], [5058], [5062], [5066], [5070], [5074], [5078], [5082], [5086], [5090], [5093], [5226], [5227], [5234], [5242], [5250], [5258], [5266], [5274], [5282], [5290], [5298], [5306], [5314], [5322], [5330], [5338], [5346], [5354], [5362], [5370], [5378], [5386], [5390], [5392], [5395], [5403], [5411], [5419], [5427], [5435], [5443], [5451], [5459], [5467], [5475], [5483], [5491], [5499], [5507], [5515], [5523], [5531], [5539], [5547], [5555], [5563], [5571], [5579], [5587], [5595], [5603], [5611], [5619], [5627], [5635], [5643], [5651], [5659], [5667], [5675], [5683], [5691], [5699], [5707], [5715], [5727], [5731], [5742], [5746], [5750], [5754], [5758], [5762], [5766], [5770], [5774], [5778], [5782], [5786], [5797], [5808], [5819], [5823], [5827], [5838], [5842], [5846], [5850], [5854], [5858], [5862], [5866], [5870], [5874], [5878], [5882], [5886], [5890], [5894], [5898], [5902], [5906], [5910], [5914], [5918], [5922], [5926], [5930], [5934], [5938], [5942], [5946], [5950], [5954], [5958], [5962], [5966], [5977], [5981], [5985], [5996], [6000], [6004], [6008], [6012], [6016], [6020], [6024], [6028], [6032], [6036], [6040], [6051], [6055], [6059], [6063], [6067], [6071], [6075], [6079], [6083], [6087], [6091], [6102], [6106], [6110], [6121], [6125], [6129], [6140], [6144], [6148], [6152], [6156], [6160], [6164], [6168], [6172], [6176], [6180], [6184], [6188], [6192], [6196], [6200], [6204], [6208], [6212], [6216], [6220], [6224], [6228], [6232], [6236], [6240], [6251], [6255], [6259], [6263], [6267], [6278], [6282], [6286], [6290], [6294], [6298], [6302], [6306], [6310], [6314], [6325], [6329], [6333], [6344], [6348], [6352], [6356], [6360], [6371], [6375], [6379], [6383], [6387], [6391], [6402], [6413], [6417], [6421], [6425], [6429], [6432], [6437], [6439], [6440], [6444], [6455], [6459], [6463], [6467], [6471], [6475], [6486], [6490], [6494], [6498], [6502], [6506], [6510], [6514], [6525], [6529], [6533], [6537], [6541], [6545], [6549], [6553], [6557], [6561], [6565], [6569], [6573], [6577], [6581], [6585], [6589], [6593], [6604], [6608], [6619], [6623], [6634], [6645], [6649], [6653], [6657], [6661], [6665], [6669], [6673], [6677], [6681], [6685], [6689], [6693], [6697], [6701], [6712], [6716], [6727], [6731], [6735], [6739], [6743], [6747], [6751], [6755], [6759], [6763], [6767], [6771], [6775], [6779], [6783], [6787], [6791], [6795], [6799], [6801], [6802], [6806], [6815], [6819], [6821], [6834], [6835], [6836], [6837], [6838], [6840], [6841] [2019-09-09 23:19:21,363 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-09 23:19:21,363 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-09 23:20:40,406 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-09-09 23:20:40,408 INFO L272 AbstractInterpreter]: Visited 488 different actions 488 times. Never merged. Never widened. Performed 1042 root evaluator evaluations with a maximum evaluation depth of 15. Performed 1042 inverse root evaluator evaluations with a maximum inverse evaluation depth of 15. Never found a fixpoint. Largest state had 26 variables. [2019-09-09 23:20:40,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 23:20:40,414 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-09-09 23:21:49,583 INFO L227 lantSequenceWeakener]: Weakened 710 states. On average, predicates are now at 75.12% of their original sizes. [2019-09-09 23:21:49,584 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-09-09 23:21:49,755 INFO L420 sIntCurrentIteration]: We unified 733 AI predicates to 733 [2019-09-09 23:21:49,755 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-09-09 23:21:49,756 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-09 23:21:49,756 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [13] imperfect sequences [6] total 17 [2019-09-09 23:21:49,756 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 23:21:49,758 INFO L454 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-09-09 23:21:49,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-09-09 23:21:49,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2019-09-09 23:21:49,758 INFO L87 Difference]: Start difference. First operand 65277 states and 93536 transitions. Second operand 13 states.