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_label38.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 23:54:11,290 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 23:54:11,293 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 23:54:11,312 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 23:54:11,312 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 23:54:11,314 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 23:54:11,316 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 23:54:11,326 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 23:54:11,330 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 23:54:11,334 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 23:54:11,335 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 23:54:11,336 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 23:54:11,336 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 23:54:11,338 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 23:54:11,340 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 23:54:11,342 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 23:54:11,342 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 23:54:11,343 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 23:54:11,345 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 23:54:11,349 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 23:54:11,353 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 23:54:11,355 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 23:54:11,358 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 23:54:11,359 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 23:54:11,361 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-14 23:54:11,365 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-14 23:54:11,366 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-14 23:54:11,367 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-14 23:54:11,368 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-14 23:54:11,369 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-14 23:54:11,370 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-14 23:54:11,370 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-14 23:54:11,370 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-14 23:54:11,371 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 23:54:11,371 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 23:54:11,373 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 23:54:11,373 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 23:54:11,402 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 23:54:11,402 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 23:54:11,403 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 23:54:11,404 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 23:54:11,404 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 23:54:11,404 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 23:54:11,404 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 23:54:11,404 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 23:54:11,405 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 23:54:11,405 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 23:54:11,405 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 23:54:11,405 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 23:54:11,405 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 23:54:11,406 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 23:54:11,406 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 23:54:11,406 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 23:54:11,406 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 23:54:11,406 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 23:54:11,406 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 23:54:11,407 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 23:54:11,407 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 23:54:11,407 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 23:54:11,407 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 23:54:11,407 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 23:54:11,408 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 23:54:11,408 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 23:54:11,408 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 23:54:11,408 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 23:54:11,408 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 23:54:11,676 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 23:54:11,689 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 23:54:11,692 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 23:54:11,693 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 23:54:11,694 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 23:54:11,694 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem01_label38.c [2019-10-14 23:54:11,771 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/09063b134/5eb2186c002941a1b1a22167401e6e2c/FLAGb2bde237b [2019-10-14 23:54:12,335 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 23:54:12,336 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem01_label38.c [2019-10-14 23:54:12,359 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/09063b134/5eb2186c002941a1b1a22167401e6e2c/FLAGb2bde237b [2019-10-14 23:54:12,570 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/09063b134/5eb2186c002941a1b1a22167401e6e2c [2019-10-14 23:54:12,580 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 23:54:12,582 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 23:54:12,583 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 23:54:12,583 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 23:54:12,587 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 23:54:12,588 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:54:12" (1/1) ... [2019-10-14 23:54:12,591 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5445bf3a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:54:12, skipping insertion in model container [2019-10-14 23:54:12,591 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:54:12" (1/1) ... [2019-10-14 23:54:12,598 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 23:54:12,650 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 23:54:13,188 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 23:54:13,193 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 23:54:13,283 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 23:54:13,299 INFO L192 MainTranslator]: Completed translation [2019-10-14 23:54:13,300 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:54:13 WrapperNode [2019-10-14 23:54:13,300 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 23:54:13,301 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 23:54:13,301 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 23:54:13,301 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 23:54:13,314 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:54:13" (1/1) ... [2019-10-14 23:54:13,315 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:54:13" (1/1) ... [2019-10-14 23:54:13,340 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:54:13" (1/1) ... [2019-10-14 23:54:13,340 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:54:13" (1/1) ... [2019-10-14 23:54:13,394 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:54:13" (1/1) ... [2019-10-14 23:54:13,409 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:54:13" (1/1) ... [2019-10-14 23:54:13,418 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:54:13" (1/1) ... [2019-10-14 23:54:13,429 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 23:54:13,430 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 23:54:13,430 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 23:54:13,430 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 23:54:13,431 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:54:13" (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 23:54:13,493 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 23:54:13,493 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 23:54:13,493 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-14 23:54:13,493 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 23:54:13,494 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-14 23:54:13,494 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 23:54:13,494 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-14 23:54:13,494 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-14 23:54:13,494 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 23:54:13,495 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 23:54:13,495 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 23:54:14,646 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 23:54:14,646 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-14 23:54:14,648 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:54:14 BoogieIcfgContainer [2019-10-14 23:54:14,648 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 23:54:14,649 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 23:54:14,649 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 23:54:14,653 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 23:54:14,653 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 11:54:12" (1/3) ... [2019-10-14 23:54:14,654 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d5cae5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:54:14, skipping insertion in model container [2019-10-14 23:54:14,654 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:54:13" (2/3) ... [2019-10-14 23:54:14,655 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d5cae5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:54:14, skipping insertion in model container [2019-10-14 23:54:14,655 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:54:14" (3/3) ... [2019-10-14 23:54:14,657 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem01_label38.c [2019-10-14 23:54:14,667 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 23:54:14,676 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 23:54:14,688 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 23:54:14,716 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 23:54:14,716 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 23:54:14,716 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 23:54:14,716 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 23:54:14,717 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 23:54:14,717 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 23:54:14,717 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 23:54:14,717 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 23:54:14,742 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states. [2019-10-14 23:54:14,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2019-10-14 23:54:14,751 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:54:14,753 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] [2019-10-14 23:54:14,754 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:54:14,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:54:14,760 INFO L82 PathProgramCache]: Analyzing trace with hash -1861146994, now seen corresponding path program 1 times [2019-10-14 23:54:14,769 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:54:14,769 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889245720] [2019-10-14 23:54:14,770 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:54:14,770 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:54:14,770 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:54:15,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:54:15,234 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 23:54:15,235 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889245720] [2019-10-14 23:54:15,235 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:54:15,236 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-14 23:54:15,236 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094457316] [2019-10-14 23:54:15,243 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 23:54:15,245 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-14 23:54:15,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 23:54:15,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 23:54:15,262 INFO L87 Difference]: Start difference. First operand 207 states. Second operand 3 states. [2019-10-14 23:54:16,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:54:16,112 INFO L93 Difference]: Finished difference Result 547 states and 938 transitions. [2019-10-14 23:54:16,112 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 23:54:16,114 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 88 [2019-10-14 23:54:16,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:54:16,140 INFO L225 Difference]: With dead ends: 547 [2019-10-14 23:54:16,140 INFO L226 Difference]: Without dead ends: 278 [2019-10-14 23:54:16,152 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 3 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 23:54:16,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2019-10-14 23:54:16,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 278. [2019-10-14 23:54:16,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 278 states. [2019-10-14 23:54:16,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 394 transitions. [2019-10-14 23:54:16,227 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 394 transitions. Word has length 88 [2019-10-14 23:54:16,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:54:16,228 INFO L462 AbstractCegarLoop]: Abstraction has 278 states and 394 transitions. [2019-10-14 23:54:16,228 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 23:54:16,228 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 394 transitions. [2019-10-14 23:54:16,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2019-10-14 23:54:16,233 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:54:16,233 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] [2019-10-14 23:54:16,234 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:54:16,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:54:16,234 INFO L82 PathProgramCache]: Analyzing trace with hash -136469723, now seen corresponding path program 1 times [2019-10-14 23:54:16,234 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:54:16,235 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782003710] [2019-10-14 23:54:16,235 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:54:16,235 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:54:16,235 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:54:16,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:54:16,328 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 23:54:16,328 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782003710] [2019-10-14 23:54:16,328 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:54:16,329 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-14 23:54:16,329 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105982266] [2019-10-14 23:54:16,331 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-14 23:54:16,331 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-14 23:54:16,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-14 23:54:16,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-14 23:54:16,332 INFO L87 Difference]: Start difference. First operand 278 states and 394 transitions. Second operand 6 states. [2019-10-14 23:54:17,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:54:17,086 INFO L93 Difference]: Finished difference Result 840 states and 1222 transitions. [2019-10-14 23:54:17,089 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 23:54:17,089 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 98 [2019-10-14 23:54:17,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:54:17,096 INFO L225 Difference]: With dead ends: 840 [2019-10-14 23:54:17,096 INFO L226 Difference]: Without dead ends: 568 [2019-10-14 23:54:17,098 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 23:54:17,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 568 states. [2019-10-14 23:54:17,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 568 to 556. [2019-10-14 23:54:17,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 556 states. [2019-10-14 23:54:17,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 556 states to 556 states and 785 transitions. [2019-10-14 23:54:17,146 INFO L78 Accepts]: Start accepts. Automaton has 556 states and 785 transitions. Word has length 98 [2019-10-14 23:54:17,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:54:17,146 INFO L462 AbstractCegarLoop]: Abstraction has 556 states and 785 transitions. [2019-10-14 23:54:17,147 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-14 23:54:17,147 INFO L276 IsEmpty]: Start isEmpty. Operand 556 states and 785 transitions. [2019-10-14 23:54:17,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2019-10-14 23:54:17,151 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:54:17,151 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] [2019-10-14 23:54:17,151 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:54:17,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:54:17,152 INFO L82 PathProgramCache]: Analyzing trace with hash -2049197465, now seen corresponding path program 1 times [2019-10-14 23:54:17,152 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:54:17,152 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180524568] [2019-10-14 23:54:17,153 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:54:17,153 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:54:17,153 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:54:17,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:54:17,280 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 23:54:17,280 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180524568] [2019-10-14 23:54:17,281 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:54:17,281 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-14 23:54:17,281 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498077228] [2019-10-14 23:54:17,283 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 23:54:17,284 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-14 23:54:17,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 23:54:17,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 23:54:17,284 INFO L87 Difference]: Start difference. First operand 556 states and 785 transitions. Second operand 3 states. [2019-10-14 23:54:17,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:54:17,886 INFO L93 Difference]: Finished difference Result 1513 states and 2177 transitions. [2019-10-14 23:54:17,888 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 23:54:17,888 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 99 [2019-10-14 23:54:17,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:54:17,895 INFO L225 Difference]: With dead ends: 1513 [2019-10-14 23:54:17,895 INFO L226 Difference]: Without dead ends: 963 [2019-10-14 23:54:17,897 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 23:54:17,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 963 states. [2019-10-14 23:54:17,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 963 to 963. [2019-10-14 23:54:17,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 963 states. [2019-10-14 23:54:17,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 963 states to 963 states and 1271 transitions. [2019-10-14 23:54:17,937 INFO L78 Accepts]: Start accepts. Automaton has 963 states and 1271 transitions. Word has length 99 [2019-10-14 23:54:17,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:54:17,937 INFO L462 AbstractCegarLoop]: Abstraction has 963 states and 1271 transitions. [2019-10-14 23:54:17,938 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 23:54:17,938 INFO L276 IsEmpty]: Start isEmpty. Operand 963 states and 1271 transitions. [2019-10-14 23:54:17,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2019-10-14 23:54:17,942 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:54:17,943 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:54:17,943 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:54:17,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:54:17,944 INFO L82 PathProgramCache]: Analyzing trace with hash -836397599, now seen corresponding path program 1 times [2019-10-14 23:54:17,944 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:54:17,944 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123696561] [2019-10-14 23:54:17,944 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:54:17,944 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:54:17,945 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:54:17,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:54:18,075 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:54:18,076 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123696561] [2019-10-14 23:54:18,076 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:54:18,076 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-14 23:54:18,076 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748522452] [2019-10-14 23:54:18,077 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 23:54:18,077 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-14 23:54:18,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 23:54:18,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 23:54:18,078 INFO L87 Difference]: Start difference. First operand 963 states and 1271 transitions. Second operand 3 states. [2019-10-14 23:54:18,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:54:18,645 INFO L93 Difference]: Finished difference Result 2462 states and 3326 transitions. [2019-10-14 23:54:18,646 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 23:54:18,646 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 100 [2019-10-14 23:54:18,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:54:18,655 INFO L225 Difference]: With dead ends: 2462 [2019-10-14 23:54:18,656 INFO L226 Difference]: Without dead ends: 1505 [2019-10-14 23:54:18,658 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 23:54:18,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1505 states. [2019-10-14 23:54:18,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1505 to 1505. [2019-10-14 23:54:18,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1505 states. [2019-10-14 23:54:18,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1505 states to 1505 states and 1971 transitions. [2019-10-14 23:54:18,710 INFO L78 Accepts]: Start accepts. Automaton has 1505 states and 1971 transitions. Word has length 100 [2019-10-14 23:54:18,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:54:18,711 INFO L462 AbstractCegarLoop]: Abstraction has 1505 states and 1971 transitions. [2019-10-14 23:54:18,711 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 23:54:18,711 INFO L276 IsEmpty]: Start isEmpty. Operand 1505 states and 1971 transitions. [2019-10-14 23:54:18,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2019-10-14 23:54:18,716 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:54:18,717 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:54:18,717 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:54:18,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:54:18,717 INFO L82 PathProgramCache]: Analyzing trace with hash -273287469, now seen corresponding path program 1 times [2019-10-14 23:54:18,718 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:54:18,718 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430412306] [2019-10-14 23:54:18,718 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:54:18,718 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:54:18,719 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:54:18,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:54:18,954 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:54:18,955 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430412306] [2019-10-14 23:54:18,956 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:54:18,956 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-14 23:54:18,956 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814908435] [2019-10-14 23:54:18,957 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-14 23:54:18,957 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-14 23:54:18,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-14 23:54:18,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-14 23:54:18,958 INFO L87 Difference]: Start difference. First operand 1505 states and 1971 transitions. Second operand 6 states. [2019-10-14 23:54:19,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:54:19,885 INFO L93 Difference]: Finished difference Result 3590 states and 4771 transitions. [2019-10-14 23:54:19,886 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-14 23:54:19,886 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 141 [2019-10-14 23:54:19,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:54:19,899 INFO L225 Difference]: With dead ends: 3590 [2019-10-14 23:54:19,899 INFO L226 Difference]: Without dead ends: 1954 [2019-10-14 23:54:19,904 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2019-10-14 23:54:19,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1954 states. [2019-10-14 23:54:19,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1954 to 1674. [2019-10-14 23:54:19,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1674 states. [2019-10-14 23:54:19,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1674 states to 1674 states and 2171 transitions. [2019-10-14 23:54:19,977 INFO L78 Accepts]: Start accepts. Automaton has 1674 states and 2171 transitions. Word has length 141 [2019-10-14 23:54:19,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:54:19,977 INFO L462 AbstractCegarLoop]: Abstraction has 1674 states and 2171 transitions. [2019-10-14 23:54:19,978 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-14 23:54:19,978 INFO L276 IsEmpty]: Start isEmpty. Operand 1674 states and 2171 transitions. [2019-10-14 23:54:19,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2019-10-14 23:54:19,985 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:54:19,985 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, 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] [2019-10-14 23:54:19,986 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:54:19,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:54:19,987 INFO L82 PathProgramCache]: Analyzing trace with hash 1345296538, now seen corresponding path program 1 times [2019-10-14 23:54:19,987 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:54:19,987 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351534200] [2019-10-14 23:54:19,988 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:54:19,988 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:54:19,988 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:54:20,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:54:20,188 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 67 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:54:20,189 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351534200] [2019-10-14 23:54:20,189 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [836544695] [2019-10-14 23:54:20,189 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 23:54:20,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:54:20,331 INFO L256 TraceCheckSpWp]: Trace formula consists of 437 conjuncts, 13 conjunts are in the unsatisfiable core [2019-10-14 23:54:20,358 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:54:20,540 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 67 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:54:20,540 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-14 23:54:20,837 WARN L191 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 39 [2019-10-14 23:54:20,920 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:54:20,922 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:54:20,924 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:54:20,927 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:54:20,935 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:54:20,936 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:54:20,937 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:54:20,938 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:54:20,940 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:54:20,942 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:54:20,943 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:54:20,944 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:54:20,945 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:54:20,946 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:54:20,951 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:54:21,184 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 67 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:54:21,184 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [892078638] [2019-10-14 23:54:21,192 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 153 [2019-10-14 23:54:21,257 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-14 23:54:21,257 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2)