/usr/bin/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/Problem03_label58.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 22:39:04,439 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 22:39:04,441 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 22:39:04,453 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-06 22:39:04,453 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-06 22:39:04,455 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-06 22:39:04,456 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-06 22:39:04,458 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-06 22:39:04,459 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-06 22:39:04,460 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-06 22:39:04,461 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-06 22:39:04,463 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-06 22:39:04,463 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 22:39:04,464 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 22:39:04,465 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 22:39:04,466 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 22:39:04,467 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 22:39:04,468 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 22:39:04,470 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 22:39:04,472 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 22:39:04,473 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 22:39:04,474 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 22:39:04,476 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 22:39:04,476 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 22:39:04,479 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 22:39:04,487 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 22:39:04,488 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 22:39:04,488 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 22:39:04,489 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 [2019-11-06 22:39:04,512 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 22:39:04,512 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 22:39:04,515 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 22:39:04,515 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 22:39:04,515 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 22:39:04,515 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 22:39:04,516 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 22:39:04,516 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 22:39:04,516 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 22:39:04,516 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 22:39:04,517 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 22:39:04,517 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 22:39:04,518 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 22:39:04,518 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 22:39:04,518 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 22:39:04,519 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 22:39:04,519 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 22:39:04,519 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 22:39:04,519 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 22:39:04,520 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 22:39:04,520 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 22:39:04,520 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 22:39:04,521 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 22:39:04,521 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 22:39:04,521 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 22:39:04,521 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 22:39:04,522 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 22:39:04,522 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 22:39:04,522 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 [2019-11-06 22:39:04,834 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 22:39:04,847 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 22:39:04,850 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 22:39:04,852 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 22:39:04,853 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 22:39:04,853 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem03_label58.c [2019-11-06 22:39:04,917 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/de29b1b11/1cc7f377af0c4607baf0292a3bd2f17e/FLAG48e26222e [2019-11-06 22:39:05,579 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 22:39:05,580 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem03_label58.c [2019-11-06 22:39:05,596 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/de29b1b11/1cc7f377af0c4607baf0292a3bd2f17e/FLAG48e26222e [2019-11-06 22:39:05,741 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/de29b1b11/1cc7f377af0c4607baf0292a3bd2f17e [2019-11-06 22:39:05,751 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 22:39:05,753 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 22:39:05,754 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 22:39:05,754 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 22:39:05,757 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 22:39:05,759 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:39:05" (1/1) ... [2019-11-06 22:39:05,762 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@77ea6363 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:39:05, skipping insertion in model container [2019-11-06 22:39:05,762 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:39:05" (1/1) ... [2019-11-06 22:39:05,769 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 22:39:05,846 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 22:39:06,752 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:39:06,771 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 22:39:07,051 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:39:07,093 INFO L192 MainTranslator]: Completed translation [2019-11-06 22:39:07,094 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:39:07 WrapperNode [2019-11-06 22:39:07,095 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 22:39:07,096 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 22:39:07,096 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 22:39:07,097 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 22:39:07,116 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:39:07" (1/1) ... [2019-11-06 22:39:07,116 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:39:07" (1/1) ... [2019-11-06 22:39:07,170 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:39:07" (1/1) ... [2019-11-06 22:39:07,171 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:39:07" (1/1) ... [2019-11-06 22:39:07,245 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:39:07" (1/1) ... [2019-11-06 22:39:07,276 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:39:07" (1/1) ... [2019-11-06 22:39:07,293 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:39:07" (1/1) ... [2019-11-06 22:39:07,307 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 22:39:07,308 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 22:39:07,308 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 22:39:07,308 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 22:39:07,309 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:39:07" (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 [2019-11-06 22:39:07,379 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 22:39:07,380 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 22:39:07,380 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-06 22:39:07,380 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 22:39:07,380 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-06 22:39:07,381 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 22:39:07,381 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 22:39:07,381 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-06 22:39:07,381 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 22:39:07,381 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 22:39:07,381 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 22:39:09,345 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 22:39:09,345 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-06 22:39:09,346 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:39:09 BoogieIcfgContainer [2019-11-06 22:39:09,347 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 22:39:09,348 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 22:39:09,348 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 22:39:09,351 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 22:39:09,351 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:39:05" (1/3) ... [2019-11-06 22:39:09,355 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@222b714a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:39:09, skipping insertion in model container [2019-11-06 22:39:09,355 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:39:07" (2/3) ... [2019-11-06 22:39:09,355 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@222b714a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:39:09, skipping insertion in model container [2019-11-06 22:39:09,355 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:39:09" (3/3) ... [2019-11-06 22:39:09,358 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem03_label58.c [2019-11-06 22:39:09,370 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 22:39:09,381 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 22:39:09,393 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 22:39:09,437 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 22:39:09,438 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 22:39:09,439 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 22:39:09,439 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 22:39:09,439 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 22:39:09,440 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 22:39:09,440 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 22:39:09,440 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 22:39:09,474 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states. [2019-11-06 22:39:09,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2019-11-06 22:39:09,494 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:39:09,495 INFO L410 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:39:09,497 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:39:09,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:39:09,504 INFO L82 PathProgramCache]: Analyzing trace with hash 321643717, now seen corresponding path program 1 times [2019-11-06 22:39:09,513 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:39:09,514 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511304746] [2019-11-06 22:39:09,514 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:39:09,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:39:10,408 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:39:10,408 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511304746] [2019-11-06 22:39:10,410 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:39:10,410 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 22:39:10,412 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467766773] [2019-11-06 22:39:10,420 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 22:39:10,422 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:39:10,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 22:39:10,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-06 22:39:10,443 INFO L87 Difference]: Start difference. First operand 311 states. Second operand 4 states. [2019-11-06 22:39:12,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:39:12,528 INFO L93 Difference]: Finished difference Result 1076 states and 1932 transitions. [2019-11-06 22:39:12,529 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 22:39:12,531 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 166 [2019-11-06 22:39:12,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:39:12,554 INFO L225 Difference]: With dead ends: 1076 [2019-11-06 22:39:12,554 INFO L226 Difference]: Without dead ends: 683 [2019-11-06 22:39:12,563 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 2 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-06 22:39:12,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 683 states. [2019-11-06 22:39:12,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 683 to 458. [2019-11-06 22:39:12,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 458 states. [2019-11-06 22:39:12,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 458 states to 458 states and 752 transitions. [2019-11-06 22:39:12,646 INFO L78 Accepts]: Start accepts. Automaton has 458 states and 752 transitions. Word has length 166 [2019-11-06 22:39:12,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:39:12,647 INFO L462 AbstractCegarLoop]: Abstraction has 458 states and 752 transitions. [2019-11-06 22:39:12,647 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 22:39:12,648 INFO L276 IsEmpty]: Start isEmpty. Operand 458 states and 752 transitions. [2019-11-06 22:39:12,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2019-11-06 22:39:12,654 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:39:12,654 INFO L410 BasicCegarLoop]: trace histogram [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] [2019-11-06 22:39:12,654 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:39:12,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:39:12,655 INFO L82 PathProgramCache]: Analyzing trace with hash -1821574551, now seen corresponding path program 1 times [2019-11-06 22:39:12,655 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:39:12,655 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850074966] [2019-11-06 22:39:12,656 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:39:12,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:39:12,916 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:39:12,917 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850074966] [2019-11-06 22:39:12,917 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:39:12,917 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-11-06 22:39:12,917 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833811074] [2019-11-06 22:39:12,919 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-06 22:39:12,919 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:39:12,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-06 22:39:12,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2019-11-06 22:39:12,920 INFO L87 Difference]: Start difference. First operand 458 states and 752 transitions. Second operand 7 states. [2019-11-06 22:39:14,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:39:14,698 INFO L93 Difference]: Finished difference Result 1415 states and 2436 transitions. [2019-11-06 22:39:14,700 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-06 22:39:14,700 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 182 [2019-11-06 22:39:14,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:39:14,711 INFO L225 Difference]: With dead ends: 1415 [2019-11-06 22:39:14,711 INFO L226 Difference]: Without dead ends: 963 [2019-11-06 22:39:14,714 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2019-11-06 22:39:14,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 963 states. [2019-11-06 22:39:14,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 963 to 906. [2019-11-06 22:39:14,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 906 states. [2019-11-06 22:39:14,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 906 states to 906 states and 1482 transitions. [2019-11-06 22:39:14,789 INFO L78 Accepts]: Start accepts. Automaton has 906 states and 1482 transitions. Word has length 182 [2019-11-06 22:39:14,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:39:14,789 INFO L462 AbstractCegarLoop]: Abstraction has 906 states and 1482 transitions. [2019-11-06 22:39:14,789 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-06 22:39:14,789 INFO L276 IsEmpty]: Start isEmpty. Operand 906 states and 1482 transitions. [2019-11-06 22:39:14,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2019-11-06 22:39:14,793 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:39:14,794 INFO L410 BasicCegarLoop]: trace histogram [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] [2019-11-06 22:39:14,794 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:39:14,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:39:14,794 INFO L82 PathProgramCache]: Analyzing trace with hash 1383589330, now seen corresponding path program 1 times [2019-11-06 22:39:14,795 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:39:14,795 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872114723] [2019-11-06 22:39:14,795 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:39:14,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:39:14,924 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:39:14,925 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872114723] [2019-11-06 22:39:14,925 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:39:14,925 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-06 22:39:14,926 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490470182] [2019-11-06 22:39:14,926 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 22:39:14,926 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:39:14,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 22:39:14,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:39:14,927 INFO L87 Difference]: Start difference. First operand 906 states and 1482 transitions. Second operand 6 states. [2019-11-06 22:39:16,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:39:16,576 INFO L93 Difference]: Finished difference Result 2754 states and 4762 transitions. [2019-11-06 22:39:16,577 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-06 22:39:16,577 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 183 [2019-11-06 22:39:16,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:39:16,591 INFO L225 Difference]: With dead ends: 2754 [2019-11-06 22:39:16,591 INFO L226 Difference]: Without dead ends: 1854 [2019-11-06 22:39:16,595 INFO L630 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 [2019-11-06 22:39:16,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1854 states. [2019-11-06 22:39:16,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1854 to 1788. [2019-11-06 22:39:16,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1788 states. [2019-11-06 22:39:16,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1788 states to 1788 states and 2937 transitions. [2019-11-06 22:39:16,684 INFO L78 Accepts]: Start accepts. Automaton has 1788 states and 2937 transitions. Word has length 183 [2019-11-06 22:39:16,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:39:16,692 INFO L462 AbstractCegarLoop]: Abstraction has 1788 states and 2937 transitions. [2019-11-06 22:39:16,693 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 22:39:16,693 INFO L276 IsEmpty]: Start isEmpty. Operand 1788 states and 2937 transitions. [2019-11-06 22:39:16,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2019-11-06 22:39:16,700 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:39:16,700 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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] [2019-11-06 22:39:16,701 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:39:16,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:39:16,701 INFO L82 PathProgramCache]: Analyzing trace with hash -819957242, now seen corresponding path program 1 times [2019-11-06 22:39:16,702 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:39:16,702 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017756098] [2019-11-06 22:39:16,702 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:39:16,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:39:16,838 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 19 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-06 22:39:16,838 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017756098] [2019-11-06 22:39:16,839 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [670827959] [2019-11-06 22:39:16,839 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 [2019-11-06 22:39:17,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:39:17,188 INFO L256 TraceCheckSpWp]: Trace formula consists of 1018 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-06 22:39:17,219 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:39:17,389 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-11-06 22:39:17,389 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:39:17,513 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 19 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-06 22:39:17,513 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:39:17,513 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 10 [2019-11-06 22:39:17,514 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418202018] [2019-11-06 22:39:17,514 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 22:39:17,515 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:39:17,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 22:39:17,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2019-11-06 22:39:17,516 INFO L87 Difference]: Start difference. First operand 1788 states and 2937 transitions. Second operand 5 states. [2019-11-06 22:39:18,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:39:18,086 INFO L93 Difference]: Finished difference Result 5418 states and 9180 transitions. [2019-11-06 22:39:18,087 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-06 22:39:18,087 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 191 [2019-11-06 22:39:18,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:39:18,112 INFO L225 Difference]: With dead ends: 5418 [2019-11-06 22:39:18,112 INFO L226 Difference]: Without dead ends: 3636 [2019-11-06 22:39:18,119 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 390 GetRequests, 376 SyntacticMatches, 4 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2019-11-06 22:39:18,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3636 states. [2019-11-06 22:39:18,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3636 to 3600. [2019-11-06 22:39:18,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3600 states. [2019-11-06 22:39:18,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3600 states to 3600 states and 5995 transitions. [2019-11-06 22:39:18,282 INFO L78 Accepts]: Start accepts. Automaton has 3600 states and 5995 transitions. Word has length 191 [2019-11-06 22:39:18,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:39:18,283 INFO L462 AbstractCegarLoop]: Abstraction has 3600 states and 5995 transitions. [2019-11-06 22:39:18,283 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 22:39:18,283 INFO L276 IsEmpty]: Start isEmpty. Operand 3600 states and 5995 transitions. [2019-11-06 22:39:18,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2019-11-06 22:39:18,295 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:39:18,296 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 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] [2019-11-06 22:39:18,502 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:39:18,502 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:39:18,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:39:18,503 INFO L82 PathProgramCache]: Analyzing trace with hash -726658347, now seen corresponding path program 1 times [2019-11-06 22:39:18,503 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:39:18,503 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659662557] [2019-11-06 22:39:18,503 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:39:18,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:39:18,803 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 32 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:39:18,804 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659662557] [2019-11-06 22:39:18,804 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1165975295] [2019-11-06 22:39:18,804 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:39:19,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:39:19,156 INFO L256 TraceCheckSpWp]: Trace formula consists of 1021 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-06 22:39:19,172 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:39:19,264 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 18 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-06 22:39:19,264 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:39:19,390 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 28 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-06 22:39:19,391 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [789688874] [2019-11-06 22:39:19,398 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 195 [2019-11-06 22:39:19,486 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-11-06 22:39:19,486 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2)