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_label02.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 23:53:01,439 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 23:53:01,442 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 23:53:01,457 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 23:53:01,457 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 23:53:01,458 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 23:53:01,460 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 23:53:01,461 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 23:53:01,463 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 23:53:01,464 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 23:53:01,465 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 23:53:01,466 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 23:53:01,466 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 23:53:01,467 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 23:53:01,468 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 23:53:01,470 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 23:53:01,470 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 23:53:01,471 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 23:53:01,473 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 23:53:01,475 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 23:53:01,477 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 23:53:01,478 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 23:53:01,479 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 23:53:01,480 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 23:53:01,482 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-14 23:53:01,485 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-14 23:53:01,486 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-14 23:53:01,487 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-14 23:53:01,487 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-14 23:53:01,488 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-14 23:53:01,489 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-14 23:53:01,489 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-14 23:53:01,489 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-14 23:53:01,490 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 23:53:01,490 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 23:53:01,491 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 23:53:01,492 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 23:53:01,506 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 23:53:01,507 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 23:53:01,508 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 23:53:01,508 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 23:53:01,508 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 23:53:01,508 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 23:53:01,509 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 23:53:01,509 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 23:53:01,509 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 23:53:01,509 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 23:53:01,509 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 23:53:01,509 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 23:53:01,510 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 23:53:01,510 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 23:53:01,510 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 23:53:01,510 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 23:53:01,510 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 23:53:01,511 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 23:53:01,511 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 23:53:01,511 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 23:53:01,511 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 23:53:01,511 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 23:53:01,512 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 23:53:01,512 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 23:53:01,512 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 23:53:01,512 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 23:53:01,512 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 23:53:01,513 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 23:53:01,513 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 23:53:01,775 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 23:53:01,786 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 23:53:01,790 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 23:53:01,792 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 23:53:01,792 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 23:53:01,793 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem01_label02.c [2019-10-14 23:53:01,865 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8722011a3/203a5d041e5346c09ba089cd97039af9/FLAGe632ac641 [2019-10-14 23:53:02,359 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 23:53:02,360 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem01_label02.c [2019-10-14 23:53:02,375 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8722011a3/203a5d041e5346c09ba089cd97039af9/FLAGe632ac641 [2019-10-14 23:53:02,636 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8722011a3/203a5d041e5346c09ba089cd97039af9 [2019-10-14 23:53:02,644 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 23:53:02,646 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 23:53:02,647 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 23:53:02,647 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 23:53:02,650 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 23:53:02,652 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:53:02" (1/1) ... [2019-10-14 23:53:02,654 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@239f598d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:53:02, skipping insertion in model container [2019-10-14 23:53:02,655 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:53:02" (1/1) ... [2019-10-14 23:53:02,663 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 23:53:02,723 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 23:53:03,278 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 23:53:03,288 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 23:53:03,413 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 23:53:03,433 INFO L192 MainTranslator]: Completed translation [2019-10-14 23:53:03,433 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:53:03 WrapperNode [2019-10-14 23:53:03,433 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 23:53:03,434 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 23:53:03,434 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 23:53:03,434 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 23:53:03,449 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:53:03" (1/1) ... [2019-10-14 23:53:03,449 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:53:03" (1/1) ... [2019-10-14 23:53:03,481 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:53:03" (1/1) ... [2019-10-14 23:53:03,482 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:53:03" (1/1) ... [2019-10-14 23:53:03,524 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:53:03" (1/1) ... [2019-10-14 23:53:03,552 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:53:03" (1/1) ... [2019-10-14 23:53:03,566 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:53:03" (1/1) ... [2019-10-14 23:53:03,581 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 23:53:03,582 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 23:53:03,582 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 23:53:03,582 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 23:53:03,583 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:53:03" (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 23:53:03,675 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 23:53:03,676 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 23:53:03,676 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-14 23:53:03,676 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 23:53:03,677 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-14 23:53:03,678 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 23:53:03,678 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-14 23:53:03,679 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-14 23:53:03,680 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 23:53:03,680 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 23:53:03,681 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 23:53:05,083 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 23:53:05,084 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-14 23:53:05,087 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:53:05 BoogieIcfgContainer [2019-10-14 23:53:05,087 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 23:53:05,089 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 23:53:05,089 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 23:53:05,092 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 23:53:05,093 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 11:53:02" (1/3) ... [2019-10-14 23:53:05,093 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@103c25dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:53:05, skipping insertion in model container [2019-10-14 23:53:05,094 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:53:03" (2/3) ... [2019-10-14 23:53:05,094 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@103c25dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:53:05, skipping insertion in model container [2019-10-14 23:53:05,094 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:53:05" (3/3) ... [2019-10-14 23:53:05,096 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem01_label02.c [2019-10-14 23:53:05,107 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 23:53:05,118 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 23:53:05,130 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 23:53:05,162 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 23:53:05,163 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 23:53:05,163 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 23:53:05,163 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 23:53:05,164 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 23:53:05,164 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 23:53:05,164 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 23:53:05,165 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 23:53:05,190 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states. [2019-10-14 23:53:05,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2019-10-14 23:53:05,202 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:53:05,203 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:53:05,205 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:53:05,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:53:05,211 INFO L82 PathProgramCache]: Analyzing trace with hash 1011489582, now seen corresponding path program 1 times [2019-10-14 23:53:05,222 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:53:05,222 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760745910] [2019-10-14 23:53:05,223 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:53:05,223 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:53:05,223 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:53:05,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:53:05,734 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 23:53:05,735 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760745910] [2019-10-14 23:53:05,736 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:53:05,736 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-14 23:53:05,737 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060112510] [2019-10-14 23:53:05,742 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 23:53:05,744 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-14 23:53:05,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 23:53:05,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 23:53:05,763 INFO L87 Difference]: Start difference. First operand 207 states. Second operand 3 states. [2019-10-14 23:53:06,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:53:06,709 INFO L93 Difference]: Finished difference Result 547 states and 938 transitions. [2019-10-14 23:53:06,712 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 23:53:06,713 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 96 [2019-10-14 23:53:06,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:53:06,730 INFO L225 Difference]: With dead ends: 547 [2019-10-14 23:53:06,731 INFO L226 Difference]: Without dead ends: 278 [2019-10-14 23:53:06,738 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 23:53:06,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2019-10-14 23:53:06,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 278. [2019-10-14 23:53:06,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 278 states. [2019-10-14 23:53:06,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 400 transitions. [2019-10-14 23:53:06,810 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 400 transitions. Word has length 96 [2019-10-14 23:53:06,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:53:06,811 INFO L462 AbstractCegarLoop]: Abstraction has 278 states and 400 transitions. [2019-10-14 23:53:06,811 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 23:53:06,812 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 400 transitions. [2019-10-14 23:53:06,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2019-10-14 23:53:06,817 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:53:06,817 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:53:06,818 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:53:06,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:53:06,818 INFO L82 PathProgramCache]: Analyzing trace with hash -1321725755, now seen corresponding path program 1 times [2019-10-14 23:53:06,819 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:53:06,819 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721574490] [2019-10-14 23:53:06,819 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:53:06,819 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:53:06,819 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:53:06,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:53:06,963 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 23:53:06,963 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721574490] [2019-10-14 23:53:06,964 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:53:06,964 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-14 23:53:06,964 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028718606] [2019-10-14 23:53:06,966 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-14 23:53:06,966 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-14 23:53:06,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-14 23:53:06,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-14 23:53:06,967 INFO L87 Difference]: Start difference. First operand 278 states and 400 transitions. Second operand 6 states. [2019-10-14 23:53:07,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:53:07,890 INFO L93 Difference]: Finished difference Result 703 states and 1026 transitions. [2019-10-14 23:53:07,891 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 23:53:07,892 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 106 [2019-10-14 23:53:07,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:53:07,899 INFO L225 Difference]: With dead ends: 703 [2019-10-14 23:53:07,899 INFO L226 Difference]: Without dead ends: 431 [2019-10-14 23:53:07,901 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 23:53:07,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 431 states. [2019-10-14 23:53:07,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 431 to 419. [2019-10-14 23:53:07,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 419 states. [2019-10-14 23:53:07,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 419 states to 419 states and 588 transitions. [2019-10-14 23:53:07,934 INFO L78 Accepts]: Start accepts. Automaton has 419 states and 588 transitions. Word has length 106 [2019-10-14 23:53:07,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:53:07,935 INFO L462 AbstractCegarLoop]: Abstraction has 419 states and 588 transitions. [2019-10-14 23:53:07,935 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-14 23:53:07,935 INFO L276 IsEmpty]: Start isEmpty. Operand 419 states and 588 transitions. [2019-10-14 23:53:07,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2019-10-14 23:53:07,939 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:53:07,940 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:53:07,940 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:53:07,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:53:07,940 INFO L82 PathProgramCache]: Analyzing trace with hash -1059863033, now seen corresponding path program 1 times [2019-10-14 23:53:07,941 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:53:07,941 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876924496] [2019-10-14 23:53:07,941 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:53:07,941 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:53:07,942 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:53:07,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:53:08,084 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 23:53:08,085 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876924496] [2019-10-14 23:53:08,085 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:53:08,085 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-14 23:53:08,086 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417802159] [2019-10-14 23:53:08,090 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 23:53:08,090 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-14 23:53:08,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 23:53:08,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 23:53:08,092 INFO L87 Difference]: Start difference. First operand 419 states and 588 transitions. Second operand 3 states. [2019-10-14 23:53:08,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:53:08,635 INFO L93 Difference]: Finished difference Result 1241 states and 1781 transitions. [2019-10-14 23:53:08,636 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 23:53:08,636 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 107 [2019-10-14 23:53:08,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:53:08,643 INFO L225 Difference]: With dead ends: 1241 [2019-10-14 23:53:08,643 INFO L226 Difference]: Without dead ends: 828 [2019-10-14 23:53:08,645 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 23:53:08,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 828 states. [2019-10-14 23:53:08,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 828 to 828. [2019-10-14 23:53:08,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 828 states. [2019-10-14 23:53:08,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 828 states to 828 states and 1160 transitions. [2019-10-14 23:53:08,693 INFO L78 Accepts]: Start accepts. Automaton has 828 states and 1160 transitions. Word has length 107 [2019-10-14 23:53:08,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:53:08,695 INFO L462 AbstractCegarLoop]: Abstraction has 828 states and 1160 transitions. [2019-10-14 23:53:08,696 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 23:53:08,696 INFO L276 IsEmpty]: Start isEmpty. Operand 828 states and 1160 transitions. [2019-10-14 23:53:08,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2019-10-14 23:53:08,708 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:53:08,708 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:53:08,709 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:53:08,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:53:08,709 INFO L82 PathProgramCache]: Analyzing trace with hash -742908101, now seen corresponding path program 1 times [2019-10-14 23:53:08,709 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:53:08,710 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863990451] [2019-10-14 23:53:08,710 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:53:08,710 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:53:08,710 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:53:08,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:53:08,838 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 23:53:08,838 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863990451] [2019-10-14 23:53:08,839 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:53:08,839 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-14 23:53:08,839 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45634047] [2019-10-14 23:53:08,840 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 23:53:08,840 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-14 23:53:08,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 23:53:08,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 23:53:08,841 INFO L87 Difference]: Start difference. First operand 828 states and 1160 transitions. Second operand 3 states. [2019-10-14 23:53:09,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:53:09,333 INFO L93 Difference]: Finished difference Result 2331 states and 3360 transitions. [2019-10-14 23:53:09,336 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 23:53:09,336 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 113 [2019-10-14 23:53:09,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:53:09,345 INFO L225 Difference]: With dead ends: 2331 [2019-10-14 23:53:09,346 INFO L226 Difference]: Without dead ends: 1509 [2019-10-14 23:53:09,348 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 1 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 23:53:09,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1509 states. [2019-10-14 23:53:09,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1509 to 1509. [2019-10-14 23:53:09,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1509 states. [2019-10-14 23:53:09,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1509 states to 1509 states and 2059 transitions. [2019-10-14 23:53:09,410 INFO L78 Accepts]: Start accepts. Automaton has 1509 states and 2059 transitions. Word has length 113 [2019-10-14 23:53:09,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:53:09,411 INFO L462 AbstractCegarLoop]: Abstraction has 1509 states and 2059 transitions. [2019-10-14 23:53:09,411 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 23:53:09,412 INFO L276 IsEmpty]: Start isEmpty. Operand 1509 states and 2059 transitions. [2019-10-14 23:53:09,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2019-10-14 23:53:09,418 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:53:09,418 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:53:09,419 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:53:09,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:53:09,419 INFO L82 PathProgramCache]: Analyzing trace with hash -1298833038, now seen corresponding path program 1 times [2019-10-14 23:53:09,419 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:53:09,420 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490461549] [2019-10-14 23:53:09,420 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:53:09,420 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:53:09,420 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:53:09,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:53:09,616 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 23:53:09,616 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490461549] [2019-10-14 23:53:09,617 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1803866465] [2019-10-14 23:53:09,617 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 23:53:09,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:53:09,722 INFO L256 TraceCheckSpWp]: Trace formula consists of 423 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 23:53:09,733 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:53:09,801 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 23:53:09,801 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-14 23:53:09,872 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 23:53:09,875 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:53:09,875 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [6] total 7 [2019-10-14 23:53:09,875 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783851548] [2019-10-14 23:53:09,876 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 23:53:09,876 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-14 23:53:09,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 23:53:09,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-10-14 23:53:09,877 INFO L87 Difference]: Start difference. First operand 1509 states and 2059 transitions. Second operand 3 states. [2019-10-14 23:53:10,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:53:10,454 INFO L93 Difference]: Finished difference Result 4239 states and 5918 transitions. [2019-10-14 23:53:10,455 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 23:53:10,455 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 132 [2019-10-14 23:53:10,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:53:10,519 INFO L225 Difference]: With dead ends: 4239 [2019-10-14 23:53:10,519 INFO L226 Difference]: Without dead ends: 2736 [2019-10-14 23:53:10,523 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 262 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 23:53:10,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2736 states. [2019-10-14 23:53:10,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2736 to 2736. [2019-10-14 23:53:10,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2736 states. [2019-10-14 23:53:10,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2736 states to 2736 states and 3708 transitions. [2019-10-14 23:53:10,617 INFO L78 Accepts]: Start accepts. Automaton has 2736 states and 3708 transitions. Word has length 132 [2019-10-14 23:53:10,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:53:10,617 INFO L462 AbstractCegarLoop]: Abstraction has 2736 states and 3708 transitions. [2019-10-14 23:53:10,618 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 23:53:10,618 INFO L276 IsEmpty]: Start isEmpty. Operand 2736 states and 3708 transitions. [2019-10-14 23:53:10,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2019-10-14 23:53:10,626 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:53:10,627 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:53:10,833 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:53:10,833 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:53:10,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:53:10,834 INFO L82 PathProgramCache]: Analyzing trace with hash -2131672726, now seen corresponding path program 1 times [2019-10-14 23:53:10,834 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:53:10,834 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851782352] [2019-10-14 23:53:10,834 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:53:10,834 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:53:10,835 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:53:10,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:53:10,915 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 43 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:53:10,916 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851782352] [2019-10-14 23:53:10,916 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2066323689] [2019-10-14 23:53:10,916 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 23:53:11,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:53:11,006 INFO L256 TraceCheckSpWp]: Trace formula consists of 424 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 23:53:11,022 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:53:11,091 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 43 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:53:11,091 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-14 23:53:11,183 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 43 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:53:11,184 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [1270213683] [2019-10-14 23:53:11,191 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 137 [2019-10-14 23:53:11,245 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-14 23:53:11,246 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2)