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/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --abstractinterpretationv2.abstract.domain IntervalDomain --traceabstraction.trace.refinement.strategy TAIPAN --traceabstraction.abstract.interpretation.mode USE_PREDICATES -i ../../../trunk/examples/svcomp/eca-rers2012/Problem18_label54.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 00:10:42,018 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 00:10:42,021 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 00:10:42,035 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 00:10:42,035 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 00:10:42,037 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 00:10:42,038 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 00:10:42,041 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 00:10:42,043 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 00:10:42,044 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 00:10:42,045 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 00:10:42,046 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 00:10:42,046 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 00:10:42,047 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 00:10:42,048 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 00:10:42,051 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 00:10:42,052 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 00:10:42,053 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 00:10:42,055 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 00:10:42,057 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 00:10:42,058 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 00:10:42,061 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 00:10:42,062 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 00:10:42,063 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 00:10:42,065 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 00:10:42,068 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-15 00:10:42,069 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-15 00:10:42,070 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-15 00:10:42,070 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-15 00:10:42,071 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-15 00:10:42,071 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-15 00:10:42,072 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-15 00:10:42,072 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-15 00:10:42,073 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 00:10:42,073 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 00:10:42,077 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 00:10:42,077 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-15 00:10:42,098 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 00:10:42,098 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 00:10:42,100 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 00:10:42,100 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 00:10:42,101 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 00:10:42,101 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 00:10:42,101 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 00:10:42,101 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 00:10:42,101 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 00:10:42,102 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 00:10:42,103 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 00:10:42,103 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 00:10:42,103 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 00:10:42,104 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 00:10:42,104 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 00:10:42,104 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 00:10:42,104 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 00:10:42,104 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 00:10:42,105 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 00:10:42,105 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 00:10:42,105 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 00:10:42,106 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 00:10:42,106 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 00:10:42,106 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 00:10:42,106 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 00:10:42,106 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 00:10:42,106 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 00:10:42,107 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 00:10:42,107 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2: Abstract domain -> IntervalDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Abstract interpretation Mode -> USE_PREDICATES [2019-10-15 00:10:42,386 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 00:10:42,399 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 00:10:42,403 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 00:10:42,404 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 00:10:42,405 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 00:10:42,406 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem18_label54.c [2019-10-15 00:10:42,469 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4922dbf71/bd8a7075b4fa47ce94b9ffbcd7acb85b/FLAGa3bbfaa07 [2019-10-15 00:10:43,145 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 00:10:43,146 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem18_label54.c [2019-10-15 00:10:43,181 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4922dbf71/bd8a7075b4fa47ce94b9ffbcd7acb85b/FLAGa3bbfaa07 [2019-10-15 00:10:43,239 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4922dbf71/bd8a7075b4fa47ce94b9ffbcd7acb85b [2019-10-15 00:10:43,251 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 00:10:43,254 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 00:10:43,259 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 00:10:43,260 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 00:10:43,264 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 00:10:43,266 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 12:10:43" (1/1) ... [2019-10-15 00:10:43,269 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7a197eab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:10:43, skipping insertion in model container [2019-10-15 00:10:43,269 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 12:10:43" (1/1) ... [2019-10-15 00:10:43,279 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 00:10:43,398 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 00:10:44,724 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 00:10:44,736 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 00:10:45,200 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 00:10:45,230 INFO L192 MainTranslator]: Completed translation [2019-10-15 00:10:45,230 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:10:45 WrapperNode [2019-10-15 00:10:45,231 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 00:10:45,232 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 00:10:45,232 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 00:10:45,233 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 00:10:45,248 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:10:45" (1/1) ... [2019-10-15 00:10:45,248 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:10:45" (1/1) ... [2019-10-15 00:10:45,307 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:10:45" (1/1) ... [2019-10-15 00:10:45,308 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:10:45" (1/1) ... [2019-10-15 00:10:45,400 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:10:45" (1/1) ... [2019-10-15 00:10:45,427 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:10:45" (1/1) ... [2019-10-15 00:10:45,449 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:10:45" (1/1) ... [2019-10-15 00:10:45,483 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 00:10:45,483 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 00:10:45,484 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 00:10:45,484 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 00:10:45,485 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:10:45" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 00:10:45,550 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 00:10:45,550 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 00:10:45,550 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-15 00:10:45,550 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-10-15 00:10:45,551 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2019-10-15 00:10:45,551 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 00:10:45,551 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-15 00:10:45,551 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-10-15 00:10:45,551 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2019-10-15 00:10:45,552 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 00:10:45,552 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 00:10:45,552 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-15 00:10:45,552 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 00:10:45,552 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 00:10:45,552 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 00:10:49,348 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 00:10:49,349 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-15 00:10:49,350 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 12:10:49 BoogieIcfgContainer [2019-10-15 00:10:49,351 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 00:10:49,353 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 00:10:49,353 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 00:10:49,357 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 00:10:49,357 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 12:10:43" (1/3) ... [2019-10-15 00:10:49,358 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c7bf37b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 12:10:49, skipping insertion in model container [2019-10-15 00:10:49,358 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:10:45" (2/3) ... [2019-10-15 00:10:49,359 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c7bf37b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 12:10:49, skipping insertion in model container [2019-10-15 00:10:49,359 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 12:10:49" (3/3) ... [2019-10-15 00:10:49,363 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem18_label54.c [2019-10-15 00:10:49,374 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 00:10:49,384 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 00:10:49,398 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 00:10:49,435 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 00:10:49,435 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 00:10:49,435 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 00:10:49,435 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 00:10:49,436 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 00:10:49,436 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 00:10:49,436 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 00:10:49,436 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 00:10:49,472 INFO L276 IsEmpty]: Start isEmpty. Operand 774 states. [2019-10-15 00:10:49,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2019-10-15 00:10:49,481 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:10:49,482 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 00:10:49,484 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:10:49,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:10:49,490 INFO L82 PathProgramCache]: Analyzing trace with hash 466768385, now seen corresponding path program 1 times [2019-10-15 00:10:49,500 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:10:49,501 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756161606] [2019-10-15 00:10:49,501 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:10:49,501 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:10:49,502 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:10:49,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:10:49,934 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:10:49,934 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756161606] [2019-10-15 00:10:49,935 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:10:49,936 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-15 00:10:49,937 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378920893] [2019-10-15 00:10:49,943 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 00:10:49,945 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:10:49,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 00:10:49,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-15 00:10:49,967 INFO L87 Difference]: Start difference. First operand 774 states. Second operand 4 states. [2019-10-15 00:10:58,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:10:58,084 INFO L93 Difference]: Finished difference Result 2970 states and 5743 transitions. [2019-10-15 00:10:58,085 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 00:10:58,087 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 40 [2019-10-15 00:10:58,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:10:58,142 INFO L225 Difference]: With dead ends: 2970 [2019-10-15 00:10:58,142 INFO L226 Difference]: Without dead ends: 2114 [2019-10-15 00:10:58,164 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-15 00:10:58,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2114 states. [2019-10-15 00:10:58,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2114 to 2114. [2019-10-15 00:10:58,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2114 states. [2019-10-15 00:10:58,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2114 states to 2114 states and 3476 transitions. [2019-10-15 00:10:58,405 INFO L78 Accepts]: Start accepts. Automaton has 2114 states and 3476 transitions. Word has length 40 [2019-10-15 00:10:58,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:10:58,406 INFO L462 AbstractCegarLoop]: Abstraction has 2114 states and 3476 transitions. [2019-10-15 00:10:58,406 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 00:10:58,406 INFO L276 IsEmpty]: Start isEmpty. Operand 2114 states and 3476 transitions. [2019-10-15 00:10:58,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2019-10-15 00:10:58,411 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:10:58,412 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 00:10:58,412 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:10:58,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:10:58,413 INFO L82 PathProgramCache]: Analyzing trace with hash 653681341, now seen corresponding path program 1 times [2019-10-15 00:10:58,413 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:10:58,413 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606080544] [2019-10-15 00:10:58,414 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:10:58,414 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:10:58,414 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:10:58,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:10:58,641 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:10:58,642 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606080544] [2019-10-15 00:10:58,642 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:10:58,643 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-15 00:10:58,643 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56856212] [2019-10-15 00:10:58,645 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-15 00:10:58,645 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:10:58,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-15 00:10:58,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-15 00:10:58,646 INFO L87 Difference]: Start difference. First operand 2114 states and 3476 transitions. Second operand 5 states. [2019-10-15 00:11:05,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:11:05,366 INFO L93 Difference]: Finished difference Result 6436 states and 10709 transitions. [2019-10-15 00:11:05,366 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 00:11:05,367 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 109 [2019-10-15 00:11:05,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:11:05,397 INFO L225 Difference]: With dead ends: 6436 [2019-10-15 00:11:05,397 INFO L226 Difference]: Without dead ends: 4328 [2019-10-15 00:11:05,403 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-10-15 00:11:05,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4328 states. [2019-10-15 00:11:05,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4328 to 4296. [2019-10-15 00:11:05,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4296 states. [2019-10-15 00:11:05,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4296 states to 4296 states and 6660 transitions. [2019-10-15 00:11:05,541 INFO L78 Accepts]: Start accepts. Automaton has 4296 states and 6660 transitions. Word has length 109 [2019-10-15 00:11:05,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:11:05,542 INFO L462 AbstractCegarLoop]: Abstraction has 4296 states and 6660 transitions. [2019-10-15 00:11:05,542 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-15 00:11:05,542 INFO L276 IsEmpty]: Start isEmpty. Operand 4296 states and 6660 transitions. [2019-10-15 00:11:05,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2019-10-15 00:11:05,546 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:11:05,546 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 00:11:05,546 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:11:05,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:11:05,547 INFO L82 PathProgramCache]: Analyzing trace with hash 468776008, now seen corresponding path program 1 times [2019-10-15 00:11:05,547 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:11:05,547 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728659798] [2019-10-15 00:11:05,547 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:11:05,548 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:11:05,548 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:11:05,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:11:05,713 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:11:05,713 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728659798] [2019-10-15 00:11:05,714 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:11:05,714 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-15 00:11:05,714 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626618903] [2019-10-15 00:11:05,715 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-15 00:11:05,715 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:11:05,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-15 00:11:05,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-15 00:11:05,716 INFO L87 Difference]: Start difference. First operand 4296 states and 6660 transitions. Second operand 6 states. [2019-10-15 00:11:11,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:11:11,180 INFO L93 Difference]: Finished difference Result 10829 states and 16791 transitions. [2019-10-15 00:11:11,180 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 00:11:11,181 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 136 [2019-10-15 00:11:11,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:11:11,227 INFO L225 Difference]: With dead ends: 10829 [2019-10-15 00:11:11,228 INFO L226 Difference]: Without dead ends: 6539 [2019-10-15 00:11:11,240 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-10-15 00:11:11,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6539 states. [2019-10-15 00:11:11,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6539 to 6505. [2019-10-15 00:11:11,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6505 states. [2019-10-15 00:11:11,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6505 states to 6505 states and 8565 transitions. [2019-10-15 00:11:11,527 INFO L78 Accepts]: Start accepts. Automaton has 6505 states and 8565 transitions. Word has length 136 [2019-10-15 00:11:11,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:11:11,530 INFO L462 AbstractCegarLoop]: Abstraction has 6505 states and 8565 transitions. [2019-10-15 00:11:11,530 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-15 00:11:11,530 INFO L276 IsEmpty]: Start isEmpty. Operand 6505 states and 8565 transitions. [2019-10-15 00:11:11,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2019-10-15 00:11:11,542 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:11:11,542 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-15 00:11:11,542 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:11:11,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:11:11,543 INFO L82 PathProgramCache]: Analyzing trace with hash 1286187466, now seen corresponding path program 1 times [2019-10-15 00:11:11,543 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:11:11,543 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32753469] [2019-10-15 00:11:11,543 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:11:11,543 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:11:11,543 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:11:11,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:11:11,743 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 69 proven. 0 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2019-10-15 00:11:11,744 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32753469] [2019-10-15 00:11:11,744 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:11:11,744 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-15 00:11:11,745 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66414566] [2019-10-15 00:11:11,745 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 00:11:11,746 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:11:11,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 00:11:11,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-15 00:11:11,746 INFO L87 Difference]: Start difference. First operand 6505 states and 8565 transitions. Second operand 4 states.