/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --abstractinterpretationv2.abstract.domain IntervalDomain --traceabstraction.trace.refinement.strategy TAIPAN --traceabstraction.abstract.interpretation.mode USE_PREDICATES -i ../../../trunk/examples/svcomp/eca-rers2012/Problem03_label27.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 22:38:12,511 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 22:38:12,514 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 22:38:12,531 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-06 22:38:12,531 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-06 22:38:12,533 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-06 22:38:12,535 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-06 22:38:12,544 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-06 22:38:12,548 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-06 22:38:12,551 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-06 22:38:12,552 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-06 22:38:12,554 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-06 22:38:12,554 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 22:38:12,556 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 22:38:12,558 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 22:38:12,559 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 22:38:12,561 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 22:38:12,561 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 22:38:12,563 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 22:38:12,569 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 22:38:12,574 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 22:38:12,577 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 22:38:12,579 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 22:38:12,580 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 22:38:12,582 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 22:38:12,591 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 22:38:12,592 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 22:38:12,593 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 22:38:12,593 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-06 22:38:12,627 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 22:38:12,631 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 22:38:12,632 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 22:38:12,632 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 22:38:12,633 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 22:38:12,633 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 22:38:12,633 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 22:38:12,633 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 22:38:12,634 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 22:38:12,636 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 22:38:12,636 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 22:38:12,636 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 22:38:12,636 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 22:38:12,637 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 22:38:12,637 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 22:38:12,637 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 22:38:12,637 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 22:38:12,638 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 22:38:12,638 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 22:38:12,638 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 22:38:12,638 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 22:38:12,638 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 22:38:12,639 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 22:38:12,639 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 22:38:12,639 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 22:38:12,640 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 22:38:12,640 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 22:38:12,640 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 22:38:12,640 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2: Abstract domain -> IntervalDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Abstract interpretation Mode -> USE_PREDICATES [2019-11-06 22:38:12,954 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 22:38:12,975 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 22:38:12,979 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 22:38:12,981 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 22:38:12,981 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 22:38:12,982 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem03_label27.c [2019-11-06 22:38:13,052 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6c15bd9f6/fe0ae3464e6b40aa98a4f52beed1932b/FLAGf20981d77 [2019-11-06 22:38:13,619 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 22:38:13,620 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem03_label27.c [2019-11-06 22:38:13,640 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6c15bd9f6/fe0ae3464e6b40aa98a4f52beed1932b/FLAGf20981d77 [2019-11-06 22:38:13,897 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6c15bd9f6/fe0ae3464e6b40aa98a4f52beed1932b [2019-11-06 22:38:13,907 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 22:38:13,909 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 22:38:13,914 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 22:38:13,914 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 22:38:13,917 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 22:38:13,918 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:38:13" (1/1) ... [2019-11-06 22:38:13,921 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4427d3c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:38:13, skipping insertion in model container [2019-11-06 22:38:13,921 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:38:13" (1/1) ... [2019-11-06 22:38:13,929 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 22:38:14,013 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 22:38:14,812 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:38:14,819 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 22:38:15,179 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:38:15,204 INFO L192 MainTranslator]: Completed translation [2019-11-06 22:38:15,205 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:38:15 WrapperNode [2019-11-06 22:38:15,205 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 22:38:15,206 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 22:38:15,206 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 22:38:15,206 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 22:38:15,220 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:38:15" (1/1) ... [2019-11-06 22:38:15,220 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:38:15" (1/1) ... [2019-11-06 22:38:15,271 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:38:15" (1/1) ... [2019-11-06 22:38:15,272 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:38:15" (1/1) ... [2019-11-06 22:38:15,350 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:38:15" (1/1) ... [2019-11-06 22:38:15,364 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:38:15" (1/1) ... [2019-11-06 22:38:15,375 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:38:15" (1/1) ... [2019-11-06 22:38:15,389 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 22:38:15,389 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 22:38:15,389 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 22:38:15,390 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 22:38:15,390 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:38:15" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 22:38:15,460 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 22:38:15,460 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 22:38:15,460 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-06 22:38:15,460 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 22:38:15,461 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-06 22:38:15,461 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 22:38:15,461 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 22:38:15,461 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-06 22:38:15,462 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 22:38:15,462 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 22:38:15,462 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 22:38:17,399 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 22:38:17,400 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-06 22:38:17,401 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:38:17 BoogieIcfgContainer [2019-11-06 22:38:17,401 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 22:38:17,402 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 22:38:17,402 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 22:38:17,405 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 22:38:17,406 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:38:13" (1/3) ... [2019-11-06 22:38:17,406 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51831132 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:38:17, skipping insertion in model container [2019-11-06 22:38:17,407 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:38:15" (2/3) ... [2019-11-06 22:38:17,407 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51831132 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:38:17, skipping insertion in model container [2019-11-06 22:38:17,407 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:38:17" (3/3) ... [2019-11-06 22:38:17,409 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem03_label27.c [2019-11-06 22:38:17,421 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 22:38:17,431 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 22:38:17,442 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 22:38:17,480 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 22:38:17,480 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 22:38:17,480 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 22:38:17,480 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 22:38:17,480 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 22:38:17,481 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 22:38:17,481 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 22:38:17,481 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 22:38:17,505 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states. [2019-11-06 22:38:17,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2019-11-06 22:38:17,519 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:38:17,520 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:38:17,522 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:38:17,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:38:17,528 INFO L82 PathProgramCache]: Analyzing trace with hash 1303003168, now seen corresponding path program 1 times [2019-11-06 22:38:17,538 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:38:17,538 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30692821] [2019-11-06 22:38:17,539 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:38:17,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:38:18,295 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:38:18,296 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30692821] [2019-11-06 22:38:18,297 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:38:18,297 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-06 22:38:18,299 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203521947] [2019-11-06 22:38:18,304 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 22:38:18,305 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:38:18,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 22:38:18,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 22:38:18,322 INFO L87 Difference]: Start difference. First operand 311 states. Second operand 3 states. [2019-11-06 22:38:19,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:38:19,530 INFO L93 Difference]: Finished difference Result 852 states and 1505 transitions. [2019-11-06 22:38:19,530 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 22:38:19,532 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 159 [2019-11-06 22:38:19,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:38:19,551 INFO L225 Difference]: With dead ends: 852 [2019-11-06 22:38:19,551 INFO L226 Difference]: Without dead ends: 479 [2019-11-06 22:38:19,558 INFO L630 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 [2019-11-06 22:38:19,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 479 states. [2019-11-06 22:38:19,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 479 to 465. [2019-11-06 22:38:19,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 465 states. [2019-11-06 22:38:19,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 465 states to 465 states and 749 transitions. [2019-11-06 22:38:19,641 INFO L78 Accepts]: Start accepts. Automaton has 465 states and 749 transitions. Word has length 159 [2019-11-06 22:38:19,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:38:19,642 INFO L462 AbstractCegarLoop]: Abstraction has 465 states and 749 transitions. [2019-11-06 22:38:19,642 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 22:38:19,642 INFO L276 IsEmpty]: Start isEmpty. Operand 465 states and 749 transitions. [2019-11-06 22:38:19,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2019-11-06 22:38:19,648 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:38:19,648 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:38:19,649 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:38:19,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:38:19,649 INFO L82 PathProgramCache]: Analyzing trace with hash 436458787, now seen corresponding path program 1 times [2019-11-06 22:38:19,649 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:38:19,650 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568225648] [2019-11-06 22:38:19,650 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:38:19,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:38:19,926 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:38:19,927 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568225648] [2019-11-06 22:38:19,927 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:38:19,927 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-06 22:38:19,928 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219346767] [2019-11-06 22:38:19,930 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 22:38:19,930 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:38:19,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 22:38:19,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:38:19,931 INFO L87 Difference]: Start difference. First operand 465 states and 749 transitions. Second operand 6 states. [2019-11-06 22:38:21,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:38:21,672 INFO L93 Difference]: Finished difference Result 1400 states and 2330 transitions. [2019-11-06 22:38:21,673 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-06 22:38:21,673 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 168 [2019-11-06 22:38:21,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:38:21,681 INFO L225 Difference]: With dead ends: 1400 [2019-11-06 22:38:21,682 INFO L226 Difference]: Without dead ends: 941 [2019-11-06 22:38:21,684 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-11-06 22:38:21,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 941 states. [2019-11-06 22:38:21,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 941 to 900. [2019-11-06 22:38:21,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 900 states. [2019-11-06 22:38:21,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 900 states to 900 states and 1440 transitions. [2019-11-06 22:38:21,738 INFO L78 Accepts]: Start accepts. Automaton has 900 states and 1440 transitions. Word has length 168 [2019-11-06 22:38:21,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:38:21,739 INFO L462 AbstractCegarLoop]: Abstraction has 900 states and 1440 transitions. [2019-11-06 22:38:21,739 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 22:38:21,739 INFO L276 IsEmpty]: Start isEmpty. Operand 900 states and 1440 transitions. [2019-11-06 22:38:21,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2019-11-06 22:38:21,744 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:38:21,744 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:38:21,745 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:38:21,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:38:21,745 INFO L82 PathProgramCache]: Analyzing trace with hash 1302221225, now seen corresponding path program 1 times [2019-11-06 22:38:21,745 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:38:21,745 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208848150] [2019-11-06 22:38:21,746 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:38:21,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:38:21,907 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:38:21,907 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208848150] [2019-11-06 22:38:21,908 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:38:21,908 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-06 22:38:21,910 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298840709] [2019-11-06 22:38:21,911 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 22:38:21,912 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:38:21,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 22:38:21,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-06 22:38:21,913 INFO L87 Difference]: Start difference. First operand 900 states and 1440 transitions. Second operand 5 states. [2019-11-06 22:38:23,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:38:23,459 INFO L93 Difference]: Finished difference Result 2690 states and 4475 transitions. [2019-11-06 22:38:23,459 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 22:38:23,459 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 169 [2019-11-06 22:38:23,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:38:23,471 INFO L225 Difference]: With dead ends: 2690 [2019-11-06 22:38:23,471 INFO L226 Difference]: Without dead ends: 1796 [2019-11-06 22:38:23,474 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-11-06 22:38:23,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1796 states. [2019-11-06 22:38:23,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1796 to 1763. [2019-11-06 22:38:23,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1763 states. [2019-11-06 22:38:23,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1763 states to 1763 states and 2724 transitions. [2019-11-06 22:38:23,540 INFO L78 Accepts]: Start accepts. Automaton has 1763 states and 2724 transitions. Word has length 169 [2019-11-06 22:38:23,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:38:23,540 INFO L462 AbstractCegarLoop]: Abstraction has 1763 states and 2724 transitions. [2019-11-06 22:38:23,540 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 22:38:23,541 INFO L276 IsEmpty]: Start isEmpty. Operand 1763 states and 2724 transitions. [2019-11-06 22:38:23,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2019-11-06 22:38:23,547 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:38:23,547 INFO L410 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:38:23,548 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:38:23,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:38:23,548 INFO L82 PathProgramCache]: Analyzing trace with hash 1015492916, now seen corresponding path program 1 times [2019-11-06 22:38:23,548 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:38:23,548 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168067037] [2019-11-06 22:38:23,549 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:38:23,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:38:23,818 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:38:23,818 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168067037] [2019-11-06 22:38:23,818 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:38:23,819 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-06 22:38:23,819 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628358732] [2019-11-06 22:38:23,820 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 22:38:23,820 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:38:23,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 22:38:23,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 22:38:23,820 INFO L87 Difference]: Start difference. First operand 1763 states and 2724 transitions. Second operand 3 states. [2019-11-06 22:38:24,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:38:24,812 INFO L93 Difference]: Finished difference Result 5006 states and 7972 transitions. [2019-11-06 22:38:24,813 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 22:38:24,813 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 171 [2019-11-06 22:38:24,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:38:24,834 INFO L225 Difference]: With dead ends: 5006 [2019-11-06 22:38:24,834 INFO L226 Difference]: Without dead ends: 3249 [2019-11-06 22:38:24,840 INFO L630 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 [2019-11-06 22:38:24,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3249 states. [2019-11-06 22:38:24,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3249 to 3246. [2019-11-06 22:38:24,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3246 states. [2019-11-06 22:38:24,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3246 states to 3246 states and 4935 transitions. [2019-11-06 22:38:24,964 INFO L78 Accepts]: Start accepts. Automaton has 3246 states and 4935 transitions. Word has length 171 [2019-11-06 22:38:24,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:38:24,966 INFO L462 AbstractCegarLoop]: Abstraction has 3246 states and 4935 transitions. [2019-11-06 22:38:24,966 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 22:38:24,967 INFO L276 IsEmpty]: Start isEmpty. Operand 3246 states and 4935 transitions. [2019-11-06 22:38:24,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2019-11-06 22:38:24,980 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:38:24,980 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:38:24,981 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:38:24,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:38:24,981 INFO L82 PathProgramCache]: Analyzing trace with hash 1082780184, now seen corresponding path program 1 times [2019-11-06 22:38:24,982 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:38:24,982 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413469852] [2019-11-06 22:38:24,983 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:38:25,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:38:25,288 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:38:25,289 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413469852] [2019-11-06 22:38:25,290 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:38:25,290 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-06 22:38:25,290 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014101946] [2019-11-06 22:38:25,291 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 22:38:25,291 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:38:25,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 22:38:25,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 22:38:25,293 INFO L87 Difference]: Start difference. First operand 3246 states and 4935 transitions. Second operand 3 states. [2019-11-06 22:38:26,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:38:26,371 INFO L93 Difference]: Finished difference Result 9442 states and 14806 transitions. [2019-11-06 22:38:26,372 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 22:38:26,372 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 173 [2019-11-06 22:38:26,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:38:26,412 INFO L225 Difference]: With dead ends: 9442 [2019-11-06 22:38:26,413 INFO L226 Difference]: Without dead ends: 6202 [2019-11-06 22:38:26,424 INFO L630 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 [2019-11-06 22:38:26,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6202 states. [2019-11-06 22:38:26,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6202 to 6194. [2019-11-06 22:38:26,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6194 states. [2019-11-06 22:38:26,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6194 states to 6194 states and 9368 transitions. [2019-11-06 22:38:26,722 INFO L78 Accepts]: Start accepts. Automaton has 6194 states and 9368 transitions. Word has length 173 [2019-11-06 22:38:26,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:38:26,723 INFO L462 AbstractCegarLoop]: Abstraction has 6194 states and 9368 transitions. [2019-11-06 22:38:26,723 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 22:38:26,723 INFO L276 IsEmpty]: Start isEmpty. Operand 6194 states and 9368 transitions. [2019-11-06 22:38:26,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2019-11-06 22:38:26,742 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:38:26,743 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:38:26,743 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:38:26,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:38:26,744 INFO L82 PathProgramCache]: Analyzing trace with hash -1343685801, now seen corresponding path program 1 times [2019-11-06 22:38:26,744 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:38:26,744 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838128058] [2019-11-06 22:38:26,744 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:38:26,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:38:26,856 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:38:26,857 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838128058] [2019-11-06 22:38:26,857 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:38:26,857 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-06 22:38:26,858 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785761433] [2019-11-06 22:38:26,858 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 22:38:26,858 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:38:26,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 22:38:26,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:38:26,859 INFO L87 Difference]: Start difference. First operand 6194 states and 9368 transitions. Second operand 6 states. [2019-11-06 22:38:28,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:38:28,214 INFO L93 Difference]: Finished difference Result 12565 states and 20117 transitions. [2019-11-06 22:38:28,214 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 22:38:28,214 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 178 [2019-11-06 22:38:28,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:38:28,251 INFO L225 Difference]: With dead ends: 12565 [2019-11-06 22:38:28,251 INFO L226 Difference]: Without dead ends: 6377 [2019-11-06 22:38:28,274 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-11-06 22:38:28,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6377 states. [2019-11-06 22:38:28,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6377 to 6306. [2019-11-06 22:38:28,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6306 states. [2019-11-06 22:38:28,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6306 states to 6306 states and 9051 transitions. [2019-11-06 22:38:28,559 INFO L78 Accepts]: Start accepts. Automaton has 6306 states and 9051 transitions. Word has length 178 [2019-11-06 22:38:28,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:38:28,559 INFO L462 AbstractCegarLoop]: Abstraction has 6306 states and 9051 transitions. [2019-11-06 22:38:28,559 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 22:38:28,559 INFO L276 IsEmpty]: Start isEmpty. Operand 6306 states and 9051 transitions. [2019-11-06 22:38:28,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2019-11-06 22:38:28,577 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:38:28,577 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:38:28,578 INFO L410 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:38:28,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:38:28,578 INFO L82 PathProgramCache]: Analyzing trace with hash -993562373, now seen corresponding path program 1 times [2019-11-06 22:38:28,579 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:38:28,582 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538524211] [2019-11-06 22:38:28,582 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:38:28,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:38:28,702 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 20 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:38:28,703 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538524211] [2019-11-06 22:38:28,703 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1013031013] [2019-11-06 22:38:28,704 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:38:28,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:38:28,916 INFO L256 TraceCheckSpWp]: Trace formula consists of 1005 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-06 22:38:28,940 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:38:28,996 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-06 22:38:28,997 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:38:29,080 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-06 22:38:29,081 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-06 22:38:29,081 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 4] imperfect sequences [5] total 7 [2019-11-06 22:38:29,082 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313685367] [2019-11-06 22:38:29,082 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 22:38:29,082 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:38:29,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 22:38:29,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-11-06 22:38:29,083 INFO L87 Difference]: Start difference. First operand 6306 states and 9051 transitions. Second operand 4 states. [2019-11-06 22:38:29,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:38:29,923 INFO L93 Difference]: Finished difference Result 12603 states and 18094 transitions. [2019-11-06 22:38:29,923 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 22:38:29,923 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 181 [2019-11-06 22:38:29,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:38:29,961 INFO L225 Difference]: With dead ends: 12603 [2019-11-06 22:38:29,962 INFO L226 Difference]: Without dead ends: 6303 [2019-11-06 22:38:29,977 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 366 GetRequests, 361 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-11-06 22:38:29,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6303 states. [2019-11-06 22:38:30,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6303 to 6303. [2019-11-06 22:38:30,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6303 states. [2019-11-06 22:38:30,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6303 states to 6303 states and 9042 transitions. [2019-11-06 22:38:30,154 INFO L78 Accepts]: Start accepts. Automaton has 6303 states and 9042 transitions. Word has length 181 [2019-11-06 22:38:30,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:38:30,154 INFO L462 AbstractCegarLoop]: Abstraction has 6303 states and 9042 transitions. [2019-11-06 22:38:30,155 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 22:38:30,155 INFO L276 IsEmpty]: Start isEmpty. Operand 6303 states and 9042 transitions. [2019-11-06 22:38:30,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2019-11-06 22:38:30,174 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:38:30,174 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:38:30,388 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:38:30,388 INFO L410 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:38:30,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:38:30,389 INFO L82 PathProgramCache]: Analyzing trace with hash 601297791, now seen corresponding path program 1 times [2019-11-06 22:38:30,389 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:38:30,389 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701320523] [2019-11-06 22:38:30,389 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:38:30,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:38:30,529 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:38:30,529 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701320523] [2019-11-06 22:38:30,530 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:38:30,530 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-06 22:38:30,531 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090033324] [2019-11-06 22:38:30,531 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 22:38:30,532 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:38:30,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 22:38:30,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:38:30,532 INFO L87 Difference]: Start difference. First operand 6303 states and 9042 transitions. Second operand 6 states. [2019-11-06 22:38:32,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:38:32,325 INFO L93 Difference]: Finished difference Result 18215 states and 27311 transitions. [2019-11-06 22:38:32,326 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 22:38:32,326 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 182 [2019-11-06 22:38:32,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:38:32,366 INFO L225 Difference]: With dead ends: 18215 [2019-11-06 22:38:32,367 INFO L226 Difference]: Without dead ends: 11918 [2019-11-06 22:38:32,382 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-11-06 22:38:32,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11918 states. [2019-11-06 22:38:32,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11918 to 11841. [2019-11-06 22:38:32,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11841 states. [2019-11-06 22:38:32,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11841 states to 11841 states and 15939 transitions. [2019-11-06 22:38:32,691 INFO L78 Accepts]: Start accepts. Automaton has 11841 states and 15939 transitions. Word has length 182 [2019-11-06 22:38:32,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:38:32,692 INFO L462 AbstractCegarLoop]: Abstraction has 11841 states and 15939 transitions. [2019-11-06 22:38:32,692 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 22:38:32,692 INFO L276 IsEmpty]: Start isEmpty. Operand 11841 states and 15939 transitions. [2019-11-06 22:38:32,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2019-11-06 22:38:32,725 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:38:32,726 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:38:32,726 INFO L410 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:38:32,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:38:32,726 INFO L82 PathProgramCache]: Analyzing trace with hash -38037913, now seen corresponding path program 1 times [2019-11-06 22:38:32,727 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:38:32,728 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366400631] [2019-11-06 22:38:32,728 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:38:32,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:38:32,885 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 56 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:38:32,885 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366400631] [2019-11-06 22:38:32,885 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1286968006] [2019-11-06 22:38:32,886 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:38:33,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:38:33,104 INFO L256 TraceCheckSpWp]: Trace formula consists of 1044 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 22:38:33,114 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:38:33,219 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-11-06 22:38:33,220 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:38:33,417 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-11-06 22:38:33,418 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-06 22:38:33,419 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [6] total 8 [2019-11-06 22:38:33,419 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961590991] [2019-11-06 22:38:33,420 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 22:38:33,420 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:38:33,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 22:38:33,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2019-11-06 22:38:33,422 INFO L87 Difference]: Start difference. First operand 11841 states and 15939 transitions. Second operand 4 states. [2019-11-06 22:38:35,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:38:35,023 INFO L93 Difference]: Finished difference Result 28705 states and 38094 transitions. [2019-11-06 22:38:35,023 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 22:38:35,023 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 211 [2019-11-06 22:38:35,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:38:35,081 INFO L225 Difference]: With dead ends: 28705 [2019-11-06 22:38:35,082 INFO L226 Difference]: Without dead ends: 16870 [2019-11-06 22:38:35,121 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 427 GetRequests, 421 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2019-11-06 22:38:35,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16870 states. [2019-11-06 22:38:35,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16870 to 16867. [2019-11-06 22:38:35,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16867 states. [2019-11-06 22:38:35,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16867 states to 16867 states and 21495 transitions. [2019-11-06 22:38:35,661 INFO L78 Accepts]: Start accepts. Automaton has 16867 states and 21495 transitions. Word has length 211 [2019-11-06 22:38:35,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:38:35,662 INFO L462 AbstractCegarLoop]: Abstraction has 16867 states and 21495 transitions. [2019-11-06 22:38:35,662 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 22:38:35,662 INFO L276 IsEmpty]: Start isEmpty. Operand 16867 states and 21495 transitions. [2019-11-06 22:38:35,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2019-11-06 22:38:35,709 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:38:35,710 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:38:35,923 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:38:35,923 INFO L410 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:38:35,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:38:35,924 INFO L82 PathProgramCache]: Analyzing trace with hash 739387165, now seen corresponding path program 1 times [2019-11-06 22:38:35,924 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:38:35,925 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870132755] [2019-11-06 22:38:35,925 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:38:35,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:38:36,765 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 76 proven. 22 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-11-06 22:38:36,770 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870132755] [2019-11-06 22:38:36,770 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [343446807] [2019-11-06 22:38:36,771 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:38:37,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:38:37,016 INFO L256 TraceCheckSpWp]: Trace formula consists of 1213 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 22:38:37,031 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:38:37,139 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 97 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-11-06 22:38:37,139 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:38:37,289 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 97 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-11-06 22:38:37,290 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [289037287] [2019-11-06 22:38:37,298 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 233 [2019-11-06 22:38:37,368 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-11-06 22:38:37,368 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2)