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/Problem01_label20.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 23:53:47,406 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 23:53:47,410 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 23:53:47,425 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 23:53:47,425 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 23:53:47,426 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 23:53:47,427 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 23:53:47,429 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 23:53:47,431 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 23:53:47,431 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 23:53:47,432 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 23:53:47,433 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 23:53:47,434 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 23:53:47,435 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 23:53:47,435 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 23:53:47,438 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 23:53:47,439 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 23:53:47,441 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 23:53:47,443 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 23:53:47,445 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 23:53:47,448 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 23:53:47,451 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 23:53:47,453 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 23:53:47,454 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 23:53:47,456 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-14 23:53:47,461 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-14 23:53:47,462 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-14 23:53:47,463 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-14 23:53:47,464 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-14 23:53:47,467 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-14 23:53:47,467 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-14 23:53:47,468 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-14 23:53:47,468 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-14 23:53:47,468 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 23:53:47,469 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 23:53:47,472 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 23:53:47,473 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 [2019-10-14 23:53:47,493 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 23:53:47,493 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 23:53:47,495 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 23:53:47,495 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 23:53:47,495 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 23:53:47,495 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 23:53:47,496 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 23:53:47,496 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 23:53:47,496 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 23:53:47,496 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 23:53:47,497 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 23:53:47,497 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 23:53:47,498 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 23:53:47,498 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 23:53:47,498 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 23:53:47,498 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 23:53:47,499 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 23:53:47,499 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 23:53:47,499 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 23:53:47,499 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 23:53:47,499 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 23:53:47,500 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 23:53:47,500 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 23:53:47,500 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 23:53:47,500 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 23:53:47,500 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 23:53:47,501 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 23:53:47,501 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 23:53:47,501 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 [2019-10-14 23:53:47,782 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 23:53:47,809 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 23:53:47,814 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 23:53:47,816 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 23:53:47,816 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 23:53:47,817 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem01_label20.c [2019-10-14 23:53:47,886 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d07559676/d91cbe53325e4451a6502851c601409c/FLAG6021a6edb [2019-10-14 23:53:48,450 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 23:53:48,450 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem01_label20.c [2019-10-14 23:53:48,475 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d07559676/d91cbe53325e4451a6502851c601409c/FLAG6021a6edb [2019-10-14 23:53:48,709 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d07559676/d91cbe53325e4451a6502851c601409c [2019-10-14 23:53:48,717 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 23:53:48,719 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 23:53:48,719 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 23:53:48,720 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 23:53:48,724 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 23:53:48,725 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:53:48" (1/1) ... [2019-10-14 23:53:48,729 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1c329617 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:53:48, skipping insertion in model container [2019-10-14 23:53:48,730 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:53:48" (1/1) ... [2019-10-14 23:53:48,739 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 23:53:48,797 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 23:53:49,215 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 23:53:49,220 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 23:53:49,461 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 23:53:49,477 INFO L192 MainTranslator]: Completed translation [2019-10-14 23:53:49,478 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:53:49 WrapperNode [2019-10-14 23:53:49,478 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 23:53:49,479 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 23:53:49,479 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 23:53:49,479 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 23:53:49,499 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:53:49" (1/1) ... [2019-10-14 23:53:49,500 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:53:49" (1/1) ... [2019-10-14 23:53:49,518 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:53:49" (1/1) ... [2019-10-14 23:53:49,518 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:53:49" (1/1) ... [2019-10-14 23:53:49,563 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:53:49" (1/1) ... [2019-10-14 23:53:49,580 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:53:49" (1/1) ... [2019-10-14 23:53:49,585 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:53:49" (1/1) ... [2019-10-14 23:53:49,592 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 23:53:49,592 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 23:53:49,593 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 23:53:49,593 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 23:53:49,594 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:53:49" (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 [2019-10-14 23:53:49,649 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 23:53:49,650 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 23:53:49,650 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-14 23:53:49,650 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 23:53:49,650 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-14 23:53:49,650 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 23:53:49,650 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-14 23:53:49,651 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-14 23:53:49,651 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 23:53:49,651 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 23:53:49,651 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 23:53:50,806 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 23:53:50,808 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-14 23:53:50,810 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:53:50 BoogieIcfgContainer [2019-10-14 23:53:50,810 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 23:53:50,813 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 23:53:50,813 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 23:53:50,819 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 23:53:50,819 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 11:53:48" (1/3) ... [2019-10-14 23:53:50,820 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4acbda32 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:53:50, skipping insertion in model container [2019-10-14 23:53:50,820 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:53:49" (2/3) ... [2019-10-14 23:53:50,821 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4acbda32 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:53:50, skipping insertion in model container [2019-10-14 23:53:50,821 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:53:50" (3/3) ... [2019-10-14 23:53:50,831 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem01_label20.c [2019-10-14 23:53:50,843 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 23:53:50,853 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 23:53:50,865 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 23:53:50,903 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 23:53:50,903 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 23:53:50,903 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 23:53:50,903 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 23:53:50,904 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 23:53:50,904 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 23:53:50,904 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 23:53:50,904 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 23:53:50,934 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states. [2019-10-14 23:53:50,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2019-10-14 23:53:50,944 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:53:50,945 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:53:50,947 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:53:50,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:53:50,953 INFO L82 PathProgramCache]: Analyzing trace with hash 1090826438, now seen corresponding path program 1 times [2019-10-14 23:53:50,962 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:53:50,963 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421636319] [2019-10-14 23:53:50,963 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:53:50,963 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:53:50,963 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:53:51,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:53:51,430 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:53:51,430 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421636319] [2019-10-14 23:53:51,432 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:53:51,433 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-14 23:53:51,434 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631351922] [2019-10-14 23:53:51,442 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 23:53:51,446 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-14 23:53:51,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 23:53:51,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 23:53:51,469 INFO L87 Difference]: Start difference. First operand 207 states. Second operand 3 states. [2019-10-14 23:53:52,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:53:52,439 INFO L93 Difference]: Finished difference Result 547 states and 938 transitions. [2019-10-14 23:53:52,440 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 23:53:52,441 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 78 [2019-10-14 23:53:52,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:53:52,472 INFO L225 Difference]: With dead ends: 547 [2019-10-14 23:53:52,472 INFO L226 Difference]: Without dead ends: 278 [2019-10-14 23:53:52,487 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 [2019-10-14 23:53:52,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2019-10-14 23:53:52,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 278. [2019-10-14 23:53:52,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 278 states. [2019-10-14 23:53:52,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 400 transitions. [2019-10-14 23:53:52,607 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 400 transitions. Word has length 78 [2019-10-14 23:53:52,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:53:52,609 INFO L462 AbstractCegarLoop]: Abstraction has 278 states and 400 transitions. [2019-10-14 23:53:52,610 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 23:53:52,611 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 400 transitions. [2019-10-14 23:53:52,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2019-10-14 23:53:52,624 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:53:52,625 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-14 23:53:52,625 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:53:52,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:53:52,627 INFO L82 PathProgramCache]: Analyzing trace with hash -2093961699, now seen corresponding path program 1 times [2019-10-14 23:53:52,627 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:53:52,627 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400005712] [2019-10-14 23:53:52,628 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:53:52,628 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:53:52,628 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:53:52,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:53:52,804 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:53:52,805 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400005712] [2019-10-14 23:53:52,805 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:53:52,805 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-14 23:53:52,805 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727841236] [2019-10-14 23:53:52,808 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-14 23:53:52,808 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-14 23:53:52,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-14 23:53:52,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-14 23:53:52,809 INFO L87 Difference]: Start difference. First operand 278 states and 400 transitions. Second operand 6 states. [2019-10-14 23:53:53,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:53:53,588 INFO L93 Difference]: Finished difference Result 703 states and 1026 transitions. [2019-10-14 23:53:53,591 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 23:53:53,591 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 88 [2019-10-14 23:53:53,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:53:53,602 INFO L225 Difference]: With dead ends: 703 [2019-10-14 23:53:53,602 INFO L226 Difference]: Without dead ends: 431 [2019-10-14 23:53:53,604 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 [2019-10-14 23:53:53,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 431 states. [2019-10-14 23:53:53,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 431 to 419. [2019-10-14 23:53:53,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 419 states. [2019-10-14 23:53:53,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 419 states to 419 states and 588 transitions. [2019-10-14 23:53:53,638 INFO L78 Accepts]: Start accepts. Automaton has 419 states and 588 transitions. Word has length 88 [2019-10-14 23:53:53,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:53:53,638 INFO L462 AbstractCegarLoop]: Abstraction has 419 states and 588 transitions. [2019-10-14 23:53:53,638 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-14 23:53:53,638 INFO L276 IsEmpty]: Start isEmpty. Operand 419 states and 588 transitions. [2019-10-14 23:53:53,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2019-10-14 23:53:53,640 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:53:53,640 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-14 23:53:53,641 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:53:53,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:53:53,641 INFO L82 PathProgramCache]: Analyzing trace with hash 109350879, now seen corresponding path program 1 times [2019-10-14 23:53:53,642 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:53:53,642 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626586356] [2019-10-14 23:53:53,642 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:53:53,642 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:53:53,643 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:53:53,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:53:53,780 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:53:53,780 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626586356] [2019-10-14 23:53:53,780 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:53:53,781 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-14 23:53:53,781 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766056366] [2019-10-14 23:53:53,781 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 23:53:53,782 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-14 23:53:53,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 23:53:53,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 23:53:53,782 INFO L87 Difference]: Start difference. First operand 419 states and 588 transitions. Second operand 3 states. [2019-10-14 23:53:54,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:53:54,343 INFO L93 Difference]: Finished difference Result 1241 states and 1783 transitions. [2019-10-14 23:53:54,344 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 23:53:54,344 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 89 [2019-10-14 23:53:54,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:53:54,353 INFO L225 Difference]: With dead ends: 1241 [2019-10-14 23:53:54,353 INFO L226 Difference]: Without dead ends: 828 [2019-10-14 23:53:54,355 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 23:53:54,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 828 states. [2019-10-14 23:53:54,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 828 to 828. [2019-10-14 23:53:54,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 828 states. [2019-10-14 23:53:54,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 828 states to 828 states and 1098 transitions. [2019-10-14 23:53:54,402 INFO L78 Accepts]: Start accepts. Automaton has 828 states and 1098 transitions. Word has length 89 [2019-10-14 23:53:54,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:53:54,402 INFO L462 AbstractCegarLoop]: Abstraction has 828 states and 1098 transitions. [2019-10-14 23:53:54,402 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 23:53:54,403 INFO L276 IsEmpty]: Start isEmpty. Operand 828 states and 1098 transitions. [2019-10-14 23:53:54,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2019-10-14 23:53:54,412 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:53:54,412 INFO L380 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] [2019-10-14 23:53:54,412 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:53:54,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:53:54,413 INFO L82 PathProgramCache]: Analyzing trace with hash 311463443, now seen corresponding path program 1 times [2019-10-14 23:53:54,413 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:53:54,413 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661781280] [2019-10-14 23:53:54,413 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:53:54,413 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:53:54,414 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:53:54,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:53:54,583 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:53:54,583 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661781280] [2019-10-14 23:53:54,583 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:53:54,584 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-14 23:53:54,584 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922764486] [2019-10-14 23:53:54,586 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 23:53:54,586 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-14 23:53:54,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 23:53:54,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 23:53:54,587 INFO L87 Difference]: Start difference. First operand 828 states and 1098 transitions. Second operand 3 states. [2019-10-14 23:53:55,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:53:55,185 INFO L93 Difference]: Finished difference Result 2196 states and 3010 transitions. [2019-10-14 23:53:55,190 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 23:53:55,191 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 95 [2019-10-14 23:53:55,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:53:55,221 INFO L225 Difference]: With dead ends: 2196 [2019-10-14 23:53:55,222 INFO L226 Difference]: Without dead ends: 1374 [2019-10-14 23:53:55,224 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 [2019-10-14 23:53:55,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1374 states. [2019-10-14 23:53:55,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1374 to 1237. [2019-10-14 23:53:55,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1237 states. [2019-10-14 23:53:55,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1237 states to 1237 states and 1669 transitions. [2019-10-14 23:53:55,318 INFO L78 Accepts]: Start accepts. Automaton has 1237 states and 1669 transitions. Word has length 95 [2019-10-14 23:53:55,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:53:55,321 INFO L462 AbstractCegarLoop]: Abstraction has 1237 states and 1669 transitions. [2019-10-14 23:53:55,321 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 23:53:55,321 INFO L276 IsEmpty]: Start isEmpty. Operand 1237 states and 1669 transitions. [2019-10-14 23:53:55,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2019-10-14 23:53:55,329 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:53:55,329 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:53:55,330 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:53:55,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:53:55,336 INFO L82 PathProgramCache]: Analyzing trace with hash -1961778941, now seen corresponding path program 1 times [2019-10-14 23:53:55,337 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:53:55,337 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119633448] [2019-10-14 23:53:55,337 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:53:55,337 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:53:55,337 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:53:55,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:53:55,476 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:53:55,476 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119633448] [2019-10-14 23:53:55,477 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:53:55,477 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-14 23:53:55,477 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658766818] [2019-10-14 23:53:55,478 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-14 23:53:55,478 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-14 23:53:55,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-14 23:53:55,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-14 23:53:55,479 INFO L87 Difference]: Start difference. First operand 1237 states and 1669 transitions. Second operand 6 states. [2019-10-14 23:53:56,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:53:56,343 INFO L93 Difference]: Finished difference Result 2518 states and 3539 transitions. [2019-10-14 23:53:56,343 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 23:53:56,344 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 103 [2019-10-14 23:53:56,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:53:56,353 INFO L225 Difference]: With dead ends: 2518 [2019-10-14 23:53:56,353 INFO L226 Difference]: Without dead ends: 1287 [2019-10-14 23:53:56,358 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 [2019-10-14 23:53:56,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1287 states. [2019-10-14 23:53:56,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1287 to 1126. [2019-10-14 23:53:56,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1126 states. [2019-10-14 23:53:56,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1126 states to 1126 states and 1411 transitions. [2019-10-14 23:53:56,402 INFO L78 Accepts]: Start accepts. Automaton has 1126 states and 1411 transitions. Word has length 103 [2019-10-14 23:53:56,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:53:56,402 INFO L462 AbstractCegarLoop]: Abstraction has 1126 states and 1411 transitions. [2019-10-14 23:53:56,402 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-14 23:53:56,402 INFO L276 IsEmpty]: Start isEmpty. Operand 1126 states and 1411 transitions. [2019-10-14 23:53:56,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2019-10-14 23:53:56,406 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:53:56,406 INFO L380 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:53:56,407 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:53:56,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:53:56,407 INFO L82 PathProgramCache]: Analyzing trace with hash -102961192, now seen corresponding path program 1 times [2019-10-14 23:53:56,407 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:53:56,408 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605122591] [2019-10-14 23:53:56,408 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:53:56,408 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:53:56,408 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:53:56,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:53:56,539 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 34 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:53:56,540 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605122591] [2019-10-14 23:53:56,540 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1950610003] [2019-10-14 23:53:56,540 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 [2019-10-14 23:53:56,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:53:56,656 INFO L256 TraceCheckSpWp]: Trace formula consists of 395 conjuncts, 10 conjunts are in the unsatisfiable core [2019-10-14 23:53:56,676 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:53:56,770 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-14 23:53:56,770 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-14 23:53:56,879 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-14 23:53:56,880 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:53:56,880 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 4] total 9 [2019-10-14 23:53:56,880 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564617504] [2019-10-14 23:53:56,881 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 23:53:56,881 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-14 23:53:56,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 23:53:56,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2019-10-14 23:53:56,882 INFO L87 Difference]: Start difference. First operand 1126 states and 1411 transitions. Second operand 4 states. [2019-10-14 23:53:57,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:53:57,508 INFO L93 Difference]: Finished difference Result 3346 states and 4231 transitions. [2019-10-14 23:53:57,508 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-14 23:53:57,557 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 112 [2019-10-14 23:53:57,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:53:57,569 INFO L225 Difference]: With dead ends: 3346 [2019-10-14 23:53:57,569 INFO L226 Difference]: Without dead ends: 2226 [2019-10-14 23:53:57,573 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 217 SyntacticMatches, 5 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2019-10-14 23:53:57,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2226 states. [2019-10-14 23:53:57,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2226 to 2226. [2019-10-14 23:53:57,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2226 states. [2019-10-14 23:53:57,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2226 states to 2226 states and 2775 transitions. [2019-10-14 23:53:57,648 INFO L78 Accepts]: Start accepts. Automaton has 2226 states and 2775 transitions. Word has length 112 [2019-10-14 23:53:57,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:53:57,649 INFO L462 AbstractCegarLoop]: Abstraction has 2226 states and 2775 transitions. [2019-10-14 23:53:57,649 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 23:53:57,649 INFO L276 IsEmpty]: Start isEmpty. Operand 2226 states and 2775 transitions. [2019-10-14 23:53:57,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2019-10-14 23:53:57,658 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:53:57,659 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:53:57,864 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:53:57,864 INFO L410 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:53:57,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:53:57,865 INFO L82 PathProgramCache]: Analyzing trace with hash 538165258, now seen corresponding path program 1 times [2019-10-14 23:53:57,865 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:53:57,865 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327027209] [2019-10-14 23:53:57,866 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:53:57,866 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:53:57,866 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:53:57,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:53:57,973 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 39 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:53:57,973 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327027209] [2019-10-14 23:53:57,973 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1873642567] [2019-10-14 23:53:57,974 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 [2019-10-14 23:53:58,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:53:58,059 INFO L256 TraceCheckSpWp]: Trace formula consists of 404 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 23:53:58,064 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:53:58,096 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-10-14 23:53:58,097 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-14 23:53:58,140 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-10-14 23:53:58,140 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:53:58,140 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [6] total 7 [2019-10-14 23:53:58,141 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772471285] [2019-10-14 23:53:58,142 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 23:53:58,142 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-14 23:53:58,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 23:53:58,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-10-14 23:53:58,143 INFO L87 Difference]: Start difference. First operand 2226 states and 2775 transitions. Second operand 3 states. [2019-10-14 23:53:58,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:53:58,620 INFO L93 Difference]: Finished difference Result 3040 states and 3851 transitions. [2019-10-14 23:53:58,620 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 23:53:58,621 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 114 [2019-10-14 23:53:58,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:53:58,635 INFO L225 Difference]: With dead ends: 3040 [2019-10-14 23:53:58,635 INFO L226 Difference]: Without dead ends: 3038 [2019-10-14 23:53:58,636 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 226 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-10-14 23:53:58,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3038 states. [2019-10-14 23:53:58,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3038 to 2768. [2019-10-14 23:53:58,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2768 states. [2019-10-14 23:53:58,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2768 states to 2768 states and 3486 transitions. [2019-10-14 23:53:58,733 INFO L78 Accepts]: Start accepts. Automaton has 2768 states and 3486 transitions. Word has length 114 [2019-10-14 23:53:58,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:53:58,734 INFO L462 AbstractCegarLoop]: Abstraction has 2768 states and 3486 transitions. [2019-10-14 23:53:58,734 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 23:53:58,734 INFO L276 IsEmpty]: Start isEmpty. Operand 2768 states and 3486 transitions. [2019-10-14 23:53:58,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2019-10-14 23:53:58,741 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:53:58,741 INFO L380 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:53:58,953 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:53:58,953 INFO L410 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:53:58,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:53:58,954 INFO L82 PathProgramCache]: Analyzing trace with hash -1019583006, now seen corresponding path program 1 times [2019-10-14 23:53:58,954 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:53:58,954 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179268120] [2019-10-14 23:53:58,954 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:53:58,954 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:53:58,954 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:53:58,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:53:59,042 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 59 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:53:59,043 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179268120] [2019-10-14 23:53:59,043 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1814328975] [2019-10-14 23:53:59,043 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:53:59,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:53:59,129 INFO L256 TraceCheckSpWp]: Trace formula consists of 422 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-14 23:53:59,133 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:53:59,154 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 59 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:53:59,154 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-14 23:53:59,214 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 59 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:53:59,214 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [831213964] [2019-10-14 23:53:59,219 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 135 [2019-10-14 23:53:59,269 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-14 23:53:59,270 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2)