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_label50.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 00:10:36,262 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 00:10:36,265 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 00:10:36,283 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 00:10:36,283 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 00:10:36,285 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 00:10:36,287 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 00:10:36,295 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 00:10:36,299 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 00:10:36,303 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 00:10:36,304 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 00:10:36,305 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 00:10:36,305 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 00:10:36,307 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 00:10:36,310 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 00:10:36,311 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 00:10:36,312 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 00:10:36,313 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 00:10:36,314 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 00:10:36,318 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 00:10:36,322 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 00:10:36,325 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 00:10:36,327 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 00:10:36,327 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 00:10:36,329 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-15 00:10:36,329 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-15 00:10:36,330 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-15 00:10:36,331 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-15 00:10:36,332 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-15 00:10:36,333 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-15 00:10:36,334 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-15 00:10:36,334 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-15 00:10:36,335 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-15 00:10:36,336 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-15 00:10:36,337 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-15 00:10:36,337 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-15 00:10:36,338 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-15 00:10:36,338 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-15 00:10:36,338 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 00:10:36,339 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 00:10:36,340 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 00:10:36,341 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 00:10:36,372 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 00:10:36,373 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 00:10:36,376 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 00:10:36,376 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 00:10:36,379 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 00:10:36,380 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 00:10:36,380 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 00:10:36,380 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 00:10:36,380 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 00:10:36,380 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 00:10:36,380 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 00:10:36,381 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 00:10:36,381 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 00:10:36,381 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 00:10:36,381 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 00:10:36,381 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 00:10:36,381 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 00:10:36,382 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 00:10:36,382 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 00:10:36,382 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 00:10:36,382 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 00:10:36,384 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 00:10:36,385 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 00:10:36,385 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 00:10:36,385 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 00:10:36,385 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 00:10:36,385 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 00:10:36,385 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 00:10:36,386 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 00:10:36,659 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 00:10:36,672 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 00:10:36,676 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 00:10:36,678 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 00:10:36,678 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 00:10:36,679 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem18_label50.c [2019-10-15 00:10:36,747 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/72d3e5597/084029242fd446829ea6346e35d65a27/FLAG3e008bd01 [2019-10-15 00:10:37,449 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 00:10:37,450 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem18_label50.c [2019-10-15 00:10:37,475 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/72d3e5597/084029242fd446829ea6346e35d65a27/FLAG3e008bd01 [2019-10-15 00:10:37,595 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/72d3e5597/084029242fd446829ea6346e35d65a27 [2019-10-15 00:10:37,607 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 00:10:37,610 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 00:10:37,612 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 00:10:37,612 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 00:10:37,615 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 00:10:37,617 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 12:10:37" (1/1) ... [2019-10-15 00:10:37,619 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@eb7c29b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:10:37, skipping insertion in model container [2019-10-15 00:10:37,620 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 12:10:37" (1/1) ... [2019-10-15 00:10:37,627 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 00:10:37,756 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 00:10:38,946 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 00:10:38,950 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 00:10:39,352 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 00:10:39,376 INFO L192 MainTranslator]: Completed translation [2019-10-15 00:10:39,376 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:10:39 WrapperNode [2019-10-15 00:10:39,377 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 00:10:39,377 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 00:10:39,377 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 00:10:39,377 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 00:10:39,387 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:10:39" (1/1) ... [2019-10-15 00:10:39,387 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:10:39" (1/1) ... [2019-10-15 00:10:39,439 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:10:39" (1/1) ... [2019-10-15 00:10:39,440 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:10:39" (1/1) ... [2019-10-15 00:10:39,518 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:10:39" (1/1) ... [2019-10-15 00:10:39,551 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:10:39" (1/1) ... [2019-10-15 00:10:39,570 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:10:39" (1/1) ... [2019-10-15 00:10:39,599 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 00:10:39,599 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 00:10:39,600 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 00:10:39,600 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 00:10:39,603 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:10:39" (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 00:10:39,665 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 00:10:39,666 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 00:10:39,666 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-15 00:10:39,666 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-10-15 00:10:39,666 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2019-10-15 00:10:39,667 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 00:10:39,667 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-15 00:10:39,667 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-10-15 00:10:39,667 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2019-10-15 00:10:39,667 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 00:10:39,668 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 00:10:39,668 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-15 00:10:39,668 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 00:10:39,669 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 00:10:39,669 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 00:10:43,177 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 00:10:43,177 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-15 00:10:43,179 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 12:10:43 BoogieIcfgContainer [2019-10-15 00:10:43,179 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 00:10:43,180 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 00:10:43,181 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 00:10:43,184 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 00:10:43,184 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 12:10:37" (1/3) ... [2019-10-15 00:10:43,185 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41e60138 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 12:10:43, skipping insertion in model container [2019-10-15 00:10:43,185 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:10:39" (2/3) ... [2019-10-15 00:10:43,185 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41e60138 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 12:10:43, skipping insertion in model container [2019-10-15 00:10:43,186 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 12:10:43" (3/3) ... [2019-10-15 00:10:43,190 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem18_label50.c [2019-10-15 00:10:43,200 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 00:10:43,209 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 00:10:43,220 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 00:10:43,252 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 00:10:43,253 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 00:10:43,253 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 00:10:43,253 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 00:10:43,253 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 00:10:43,253 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 00:10:43,253 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 00:10:43,254 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 00:10:43,285 INFO L276 IsEmpty]: Start isEmpty. Operand 774 states. [2019-10-15 00:10:43,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2019-10-15 00:10:43,294 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:10:43,295 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, 1, 1, 1, 1, 1, 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 00:10:43,297 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:10:43,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:10:43,302 INFO L82 PathProgramCache]: Analyzing trace with hash 118737362, now seen corresponding path program 1 times [2019-10-15 00:10:43,311 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:10:43,312 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610181146] [2019-10-15 00:10:43,312 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:10:43,312 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:10:43,312 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:10:43,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:10:43,728 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 00:10:43,729 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610181146] [2019-10-15 00:10:43,730 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:10:43,730 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 00:10:43,731 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340612750] [2019-10-15 00:10:43,736 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 00:10:43,739 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:10:43,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 00:10:43,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 00:10:43,757 INFO L87 Difference]: Start difference. First operand 774 states. Second operand 3 states. [2019-10-15 00:10:48,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:10:48,085 INFO L93 Difference]: Finished difference Result 2248 states and 4319 transitions. [2019-10-15 00:10:48,087 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 00:10:48,088 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 69 [2019-10-15 00:10:48,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:10:48,119 INFO L225 Difference]: With dead ends: 2248 [2019-10-15 00:10:48,119 INFO L226 Difference]: Without dead ends: 1412 [2019-10-15 00:10:48,131 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 00:10:48,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1412 states. [2019-10-15 00:10:48,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1412 to 1412. [2019-10-15 00:10:48,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1412 states. [2019-10-15 00:10:48,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1412 states to 1412 states and 2558 transitions. [2019-10-15 00:10:48,273 INFO L78 Accepts]: Start accepts. Automaton has 1412 states and 2558 transitions. Word has length 69 [2019-10-15 00:10:48,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:10:48,276 INFO L462 AbstractCegarLoop]: Abstraction has 1412 states and 2558 transitions. [2019-10-15 00:10:48,276 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 00:10:48,276 INFO L276 IsEmpty]: Start isEmpty. Operand 1412 states and 2558 transitions. [2019-10-15 00:10:48,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2019-10-15 00:10:48,289 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:10:48,289 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 00:10:48,290 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:10:48,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:10:48,290 INFO L82 PathProgramCache]: Analyzing trace with hash 1328569434, now seen corresponding path program 1 times [2019-10-15 00:10:48,291 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:10:48,291 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421593322] [2019-10-15 00:10:48,291 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:10:48,291 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:10:48,291 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:10:48,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:10:48,553 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:10:48,554 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421593322] [2019-10-15 00:10:48,554 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:10:48,554 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-15 00:10:48,555 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186186661] [2019-10-15 00:10:48,556 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-15 00:10:48,556 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:10:48,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-15 00:10:48,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-15 00:10:48,557 INFO L87 Difference]: Start difference. First operand 1412 states and 2558 transitions. Second operand 6 states. [2019-10-15 00:10:53,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:10:53,602 INFO L93 Difference]: Finished difference Result 4291 states and 7809 transitions. [2019-10-15 00:10:53,604 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 00:10:53,605 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 157 [2019-10-15 00:10:53,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:10:53,622 INFO L225 Difference]: With dead ends: 4291 [2019-10-15 00:10:53,622 INFO L226 Difference]: Without dead ends: 2885 [2019-10-15 00:10:53,626 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 00:10:53,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2885 states. [2019-10-15 00:10:53,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2885 to 2864. [2019-10-15 00:10:53,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2864 states. [2019-10-15 00:10:53,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2864 states to 2864 states and 4821 transitions. [2019-10-15 00:10:53,709 INFO L78 Accepts]: Start accepts. Automaton has 2864 states and 4821 transitions. Word has length 157 [2019-10-15 00:10:53,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:10:53,710 INFO L462 AbstractCegarLoop]: Abstraction has 2864 states and 4821 transitions. [2019-10-15 00:10:53,710 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-15 00:10:53,710 INFO L276 IsEmpty]: Start isEmpty. Operand 2864 states and 4821 transitions. [2019-10-15 00:10:53,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2019-10-15 00:10:53,714 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:10:53,715 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, 2, 2, 2, 2, 2, 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] [2019-10-15 00:10:53,715 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:10:53,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:10:53,716 INFO L82 PathProgramCache]: Analyzing trace with hash -1960156325, now seen corresponding path program 1 times [2019-10-15 00:10:53,716 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:10:53,716 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851349644] [2019-10-15 00:10:53,716 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:10:53,717 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:10:53,717 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:10:53,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:10:54,018 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:10:54,018 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851349644] [2019-10-15 00:10:54,019 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:10:54,019 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-15 00:10:54,019 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933567393] [2019-10-15 00:10:54,020 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-15 00:10:54,020 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:10:54,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-15 00:10:54,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-15 00:10:54,021 INFO L87 Difference]: Start difference. First operand 2864 states and 4821 transitions. Second operand 6 states. [2019-10-15 00:10:58,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:10:58,890 INFO L93 Difference]: Finished difference Result 6538 states and 10942 transitions. [2019-10-15 00:10:58,896 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 00:10:58,897 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 204 [2019-10-15 00:10:58,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:10:58,918 INFO L225 Difference]: With dead ends: 6538 [2019-10-15 00:10:58,918 INFO L226 Difference]: Without dead ends: 3680 [2019-10-15 00:10:58,925 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-10-15 00:10:58,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3680 states. [2019-10-15 00:10:59,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3680 to 3624. [2019-10-15 00:10:59,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3624 states. [2019-10-15 00:10:59,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3624 states to 3624 states and 5583 transitions. [2019-10-15 00:10:59,011 INFO L78 Accepts]: Start accepts. Automaton has 3624 states and 5583 transitions. Word has length 204 [2019-10-15 00:10:59,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:10:59,012 INFO L462 AbstractCegarLoop]: Abstraction has 3624 states and 5583 transitions. [2019-10-15 00:10:59,012 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-15 00:10:59,012 INFO L276 IsEmpty]: Start isEmpty. Operand 3624 states and 5583 transitions. [2019-10-15 00:10:59,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2019-10-15 00:10:59,015 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:10:59,016 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, 2, 2, 2, 2, 2, 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] [2019-10-15 00:10:59,016 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:10:59,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:10:59,017 INFO L82 PathProgramCache]: Analyzing trace with hash -1938661825, now seen corresponding path program 1 times [2019-10-15 00:10:59,017 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:10:59,017 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76566112] [2019-10-15 00:10:59,017 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:10:59,017 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:10:59,018 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:10:59,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:10:59,193 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:10:59,194 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76566112] [2019-10-15 00:10:59,194 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:10:59,194 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-15 00:10:59,194 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80326429] [2019-10-15 00:10:59,195 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-15 00:10:59,195 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:10:59,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-15 00:10:59,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-15 00:10:59,196 INFO L87 Difference]: Start difference. First operand 3624 states and 5583 transitions. Second operand 6 states. [2019-10-15 00:11:03,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:11:03,834 INFO L93 Difference]: Finished difference Result 9481 states and 14567 transitions. [2019-10-15 00:11:03,839 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 00:11:03,840 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 206 [2019-10-15 00:11:03,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:11:03,863 INFO L225 Difference]: With dead ends: 9481 [2019-10-15 00:11:03,863 INFO L226 Difference]: Without dead ends: 5863 [2019-10-15 00:11:03,872 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 00:11:03,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5863 states. [2019-10-15 00:11:03,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5863 to 5821. [2019-10-15 00:11:03,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5821 states. [2019-10-15 00:11:03,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5821 states to 5821 states and 7606 transitions. [2019-10-15 00:11:03,994 INFO L78 Accepts]: Start accepts. Automaton has 5821 states and 7606 transitions. Word has length 206 [2019-10-15 00:11:03,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:11:03,995 INFO L462 AbstractCegarLoop]: Abstraction has 5821 states and 7606 transitions. [2019-10-15 00:11:03,995 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-15 00:11:03,995 INFO L276 IsEmpty]: Start isEmpty. Operand 5821 states and 7606 transitions. [2019-10-15 00:11:03,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 264 [2019-10-15 00:11:03,999 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:11:04,000 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, 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, 1, 1, 1, 1, 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 00:11:04,000 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:11:04,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:11:04,001 INFO L82 PathProgramCache]: Analyzing trace with hash 1498580902, now seen corresponding path program 1 times [2019-10-15 00:11:04,001 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:11:04,001 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087155402] [2019-10-15 00:11:04,001 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:11:04,002 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:11:04,002 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:11:04,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:11:04,184 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 127 proven. 0 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2019-10-15 00:11:04,185 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087155402] [2019-10-15 00:11:04,186 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:11:04,186 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-15 00:11:04,186 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149410856] [2019-10-15 00:11:04,187 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 00:11:04,188 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:11:04,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 00:11:04,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-15 00:11:04,189 INFO L87 Difference]: Start difference. First operand 5821 states and 7606 transitions. Second operand 4 states. [2019-10-15 00:11:10,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:11:10,946 INFO L93 Difference]: Finished difference Result 22350 states and 29870 transitions. [2019-10-15 00:11:10,946 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 00:11:10,947 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 263 [2019-10-15 00:11:10,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:11:11,004 INFO L225 Difference]: With dead ends: 22350 [2019-10-15 00:11:11,005 INFO L226 Difference]: Without dead ends: 16535 [2019-10-15 00:11:11,022 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-15 00:11:11,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16535 states. [2019-10-15 00:11:11,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16535 to 16535. [2019-10-15 00:11:11,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16535 states. [2019-10-15 00:11:11,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16535 states to 16535 states and 21001 transitions. [2019-10-15 00:11:11,343 INFO L78 Accepts]: Start accepts. Automaton has 16535 states and 21001 transitions. Word has length 263 [2019-10-15 00:11:11,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:11:11,344 INFO L462 AbstractCegarLoop]: Abstraction has 16535 states and 21001 transitions. [2019-10-15 00:11:11,344 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 00:11:11,344 INFO L276 IsEmpty]: Start isEmpty. Operand 16535 states and 21001 transitions. [2019-10-15 00:11:11,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 308 [2019-10-15 00:11:11,354 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:11:11,354 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, 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, 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] [2019-10-15 00:11:11,355 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:11:11,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:11:11,355 INFO L82 PathProgramCache]: Analyzing trace with hash 2032440766, now seen corresponding path program 1 times [2019-10-15 00:11:11,356 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:11:11,356 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109510913] [2019-10-15 00:11:11,356 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:11:11,356 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:11:11,356 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:11:11,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:11:11,603 INFO L134 CoverageAnalysis]: Checked inductivity of 230 backedges. 165 proven. 61 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-15 00:11:11,604 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109510913] [2019-10-15 00:11:11,604 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1026631111] [2019-10-15 00:11:11,605 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 00:11:11,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:11:11,909 INFO L256 TraceCheckSpWp]: Trace formula consists of 487 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-15 00:11:11,938 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 00:11:12,116 INFO L134 CoverageAnalysis]: Checked inductivity of 230 backedges. 127 proven. 0 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2019-10-15 00:11:12,117 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 00:11:12,253 INFO L134 CoverageAnalysis]: Checked inductivity of 230 backedges. 127 proven. 0 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2019-10-15 00:11:12,254 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-15 00:11:12,254 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5] total 7 [2019-10-15 00:11:12,254 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939721439] [2019-10-15 00:11:12,256 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 00:11:12,257 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:11:12,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 00:11:12,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-10-15 00:11:12,262 INFO L87 Difference]: Start difference. First operand 16535 states and 21001 transitions. Second operand 4 states.