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/Problem16_label02.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 00:08:00,205 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 00:08:00,207 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 00:08:00,219 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 00:08:00,220 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 00:08:00,221 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 00:08:00,222 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 00:08:00,224 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 00:08:00,226 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 00:08:00,227 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 00:08:00,228 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 00:08:00,229 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 00:08:00,229 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 00:08:00,230 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 00:08:00,231 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 00:08:00,232 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 00:08:00,233 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 00:08:00,234 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 00:08:00,235 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 00:08:00,237 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 00:08:00,238 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 00:08:00,239 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 00:08:00,240 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 00:08:00,242 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 00:08:00,246 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 00:08:00,257 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 00:08:00,259 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 00:08:00,260 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 00:08:00,262 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 [2019-10-15 00:08:00,275 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 00:08:00,276 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 00:08:00,277 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 00:08:00,277 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 00:08:00,277 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 00:08:00,278 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 00:08:00,278 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 00:08:00,278 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 00:08:00,278 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 00:08:00,278 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 00:08:00,279 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 00:08:00,279 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 00:08:00,279 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 00:08:00,279 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 00:08:00,279 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 00:08:00,279 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 00:08:00,280 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 00:08:00,280 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 00:08:00,280 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 00:08:00,280 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 00:08:00,281 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 00:08:00,281 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 00:08:00,281 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 00:08:00,281 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 00:08:00,281 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 00:08:00,282 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 00:08:00,282 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 00:08:00,282 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 00:08:00,282 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 [2019-10-15 00:08:00,574 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 00:08:00,587 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 00:08:00,591 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 00:08:00,592 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 00:08:00,593 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 00:08:00,594 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem16_label02.c [2019-10-15 00:08:00,670 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2787d6b63/5c62ffcd65744a48ae3464caf2a8df10/FLAGd142ff177 [2019-10-15 00:08:01,321 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 00:08:01,322 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem16_label02.c [2019-10-15 00:08:01,342 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2787d6b63/5c62ffcd65744a48ae3464caf2a8df10/FLAGd142ff177 [2019-10-15 00:08:01,460 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2787d6b63/5c62ffcd65744a48ae3464caf2a8df10 [2019-10-15 00:08:01,469 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 00:08:01,470 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 00:08:01,471 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 00:08:01,471 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 00:08:01,475 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 00:08:01,475 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 12:08:01" (1/1) ... [2019-10-15 00:08:01,478 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7f9fe5c2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:08:01, skipping insertion in model container [2019-10-15 00:08:01,478 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 12:08:01" (1/1) ... [2019-10-15 00:08:01,484 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 00:08:01,562 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 00:08:02,662 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 00:08:02,667 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 00:08:02,843 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 00:08:02,861 INFO L192 MainTranslator]: Completed translation [2019-10-15 00:08:02,862 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:08:02 WrapperNode [2019-10-15 00:08:02,862 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 00:08:02,863 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 00:08:02,863 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 00:08:02,863 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 00:08:02,877 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:08:02" (1/1) ... [2019-10-15 00:08:02,878 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:08:02" (1/1) ... [2019-10-15 00:08:02,923 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:08:02" (1/1) ... [2019-10-15 00:08:02,924 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:08:02" (1/1) ... [2019-10-15 00:08:02,982 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:08:02" (1/1) ... [2019-10-15 00:08:03,017 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:08:02" (1/1) ... [2019-10-15 00:08:03,036 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:08:02" (1/1) ... [2019-10-15 00:08:03,051 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 00:08:03,052 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 00:08:03,052 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 00:08:03,052 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 00:08:03,053 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:08:02" (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 [2019-10-15 00:08:03,118 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 00:08:03,118 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 00:08:03,118 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-15 00:08:03,120 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-10-15 00:08:03,121 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 00:08:03,122 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-15 00:08:03,122 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-10-15 00:08:03,122 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 00:08:03,123 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 00:08:03,123 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-15 00:08:03,123 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 00:08:03,124 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 00:08:03,124 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 00:08:05,485 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 00:08:05,489 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-15 00:08:05,491 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 12:08:05 BoogieIcfgContainer [2019-10-15 00:08:05,491 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 00:08:05,492 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 00:08:05,494 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 00:08:05,498 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 00:08:05,498 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 12:08:01" (1/3) ... [2019-10-15 00:08:05,499 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7bdbaf6b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 12:08:05, skipping insertion in model container [2019-10-15 00:08:05,499 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:08:02" (2/3) ... [2019-10-15 00:08:05,500 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7bdbaf6b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 12:08:05, skipping insertion in model container [2019-10-15 00:08:05,500 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 12:08:05" (3/3) ... [2019-10-15 00:08:05,508 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem16_label02.c [2019-10-15 00:08:05,518 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 00:08:05,528 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 00:08:05,540 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 00:08:05,589 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 00:08:05,589 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 00:08:05,589 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 00:08:05,590 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 00:08:05,590 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 00:08:05,590 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 00:08:05,590 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 00:08:05,590 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 00:08:05,635 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states. [2019-10-15 00:08:05,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2019-10-15 00:08:05,648 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:08:05,649 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] [2019-10-15 00:08:05,651 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:08:05,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:08:05,658 INFO L82 PathProgramCache]: Analyzing trace with hash -64019710, now seen corresponding path program 1 times [2019-10-15 00:08:05,670 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:08:05,670 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438555714] [2019-10-15 00:08:05,671 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:08:05,671 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:08:05,671 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:08:05,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:08:06,058 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:08:06,059 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438555714] [2019-10-15 00:08:06,060 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:08:06,060 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-15 00:08:06,060 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284046709] [2019-10-15 00:08:06,065 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 00:08:06,067 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:08:06,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 00:08:06,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-15 00:08:06,084 INFO L87 Difference]: Start difference. First operand 409 states. Second operand 4 states. [2019-10-15 00:08:09,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:08:09,798 INFO L93 Difference]: Finished difference Result 1509 states and 2834 transitions. [2019-10-15 00:08:09,798 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 00:08:09,800 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 67 [2019-10-15 00:08:09,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:08:09,844 INFO L225 Difference]: With dead ends: 1509 [2019-10-15 00:08:09,845 INFO L226 Difference]: Without dead ends: 1019 [2019-10-15 00:08:09,859 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-15 00:08:09,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1019 states. [2019-10-15 00:08:10,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1019 to 1019. [2019-10-15 00:08:10,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1019 states. [2019-10-15 00:08:10,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1019 states to 1019 states and 1739 transitions. [2019-10-15 00:08:10,029 INFO L78 Accepts]: Start accepts. Automaton has 1019 states and 1739 transitions. Word has length 67 [2019-10-15 00:08:10,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:08:10,032 INFO L462 AbstractCegarLoop]: Abstraction has 1019 states and 1739 transitions. [2019-10-15 00:08:10,032 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 00:08:10,032 INFO L276 IsEmpty]: Start isEmpty. Operand 1019 states and 1739 transitions. [2019-10-15 00:08:10,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2019-10-15 00:08:10,049 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:08:10,050 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, 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] [2019-10-15 00:08:10,050 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:08:10,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:08:10,051 INFO L82 PathProgramCache]: Analyzing trace with hash -2118195102, now seen corresponding path program 1 times [2019-10-15 00:08:10,051 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:08:10,051 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220512842] [2019-10-15 00:08:10,051 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:08:10,051 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:08:10,052 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:08:10,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:08:10,311 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:08:10,311 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220512842] [2019-10-15 00:08:10,312 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:08:10,312 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-15 00:08:10,312 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650712539] [2019-10-15 00:08:10,314 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-15 00:08:10,314 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:08:10,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-15 00:08:10,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-15 00:08:10,315 INFO L87 Difference]: Start difference. First operand 1019 states and 1739 transitions. Second operand 6 states. [2019-10-15 00:08:13,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:08:13,048 INFO L93 Difference]: Finished difference Result 3097 states and 5370 transitions. [2019-10-15 00:08:13,048 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 00:08:13,049 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 137 [2019-10-15 00:08:13,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:08:13,067 INFO L225 Difference]: With dead ends: 3097 [2019-10-15 00:08:13,067 INFO L226 Difference]: Without dead ends: 2084 [2019-10-15 00:08:13,072 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-10-15 00:08:13,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2084 states. [2019-10-15 00:08:13,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2084 to 2061. [2019-10-15 00:08:13,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2061 states. [2019-10-15 00:08:13,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2061 states to 2061 states and 3384 transitions. [2019-10-15 00:08:13,157 INFO L78 Accepts]: Start accepts. Automaton has 2061 states and 3384 transitions. Word has length 137 [2019-10-15 00:08:13,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:08:13,160 INFO L462 AbstractCegarLoop]: Abstraction has 2061 states and 3384 transitions. [2019-10-15 00:08:13,160 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-15 00:08:13,160 INFO L276 IsEmpty]: Start isEmpty. Operand 2061 states and 3384 transitions. [2019-10-15 00:08:13,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2019-10-15 00:08:13,164 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:08:13,164 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, 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] [2019-10-15 00:08:13,165 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:08:13,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:08:13,166 INFO L82 PathProgramCache]: Analyzing trace with hash -287717798, now seen corresponding path program 1 times [2019-10-15 00:08:13,166 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:08:13,166 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701553656] [2019-10-15 00:08:13,167 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:08:13,168 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:08:13,168 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:08:13,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:08:13,409 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:08:13,410 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701553656] [2019-10-15 00:08:13,410 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:08:13,411 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-15 00:08:13,411 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509587578] [2019-10-15 00:08:13,412 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-15 00:08:13,412 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:08:13,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-15 00:08:13,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-15 00:08:13,413 INFO L87 Difference]: Start difference. First operand 2061 states and 3384 transitions. Second operand 6 states. [2019-10-15 00:08:16,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:08:16,301 INFO L93 Difference]: Finished difference Result 5904 states and 10021 transitions. [2019-10-15 00:08:16,306 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 00:08:16,307 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 165 [2019-10-15 00:08:16,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:08:16,336 INFO L225 Difference]: With dead ends: 5904 [2019-10-15 00:08:16,344 INFO L226 Difference]: Without dead ends: 3849 [2019-10-15 00:08:16,351 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 [2019-10-15 00:08:16,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3849 states. [2019-10-15 00:08:16,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3849 to 3813. [2019-10-15 00:08:16,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3813 states. [2019-10-15 00:08:16,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3813 states to 3813 states and 6183 transitions. [2019-10-15 00:08:16,497 INFO L78 Accepts]: Start accepts. Automaton has 3813 states and 6183 transitions. Word has length 165 [2019-10-15 00:08:16,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:08:16,499 INFO L462 AbstractCegarLoop]: Abstraction has 3813 states and 6183 transitions. [2019-10-15 00:08:16,500 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-15 00:08:16,500 INFO L276 IsEmpty]: Start isEmpty. Operand 3813 states and 6183 transitions. [2019-10-15 00:08:16,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2019-10-15 00:08:16,504 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:08:16,504 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, 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] [2019-10-15 00:08:16,505 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:08:16,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:08:16,505 INFO L82 PathProgramCache]: Analyzing trace with hash 319632798, now seen corresponding path program 1 times [2019-10-15 00:08:16,505 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:08:16,506 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573538776] [2019-10-15 00:08:16,506 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:08:16,506 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:08:16,506 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:08:16,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:08:16,772 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:08:16,773 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573538776] [2019-10-15 00:08:16,773 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:08:16,773 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-15 00:08:16,773 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143555310] [2019-10-15 00:08:16,774 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-15 00:08:16,774 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:08:16,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-15 00:08:16,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-15 00:08:16,775 INFO L87 Difference]: Start difference. First operand 3813 states and 6183 transitions. Second operand 6 states. [2019-10-15 00:08:19,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:08:19,420 INFO L93 Difference]: Finished difference Result 9749 states and 16101 transitions. [2019-10-15 00:08:19,421 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 00:08:19,421 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 183 [2019-10-15 00:08:19,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:08:19,461 INFO L225 Difference]: With dead ends: 9749 [2019-10-15 00:08:19,461 INFO L226 Difference]: Without dead ends: 5942 [2019-10-15 00:08:19,478 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-10-15 00:08:19,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5942 states. [2019-10-15 00:08:19,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5942 to 5896. [2019-10-15 00:08:19,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5896 states. [2019-10-15 00:08:19,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5896 states to 5896 states and 8054 transitions. [2019-10-15 00:08:19,720 INFO L78 Accepts]: Start accepts. Automaton has 5896 states and 8054 transitions. Word has length 183 [2019-10-15 00:08:19,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:08:19,722 INFO L462 AbstractCegarLoop]: Abstraction has 5896 states and 8054 transitions. [2019-10-15 00:08:19,722 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-15 00:08:19,722 INFO L276 IsEmpty]: Start isEmpty. Operand 5896 states and 8054 transitions. [2019-10-15 00:08:19,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2019-10-15 00:08:19,725 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:08:19,726 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, 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] [2019-10-15 00:08:19,726 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:08:19,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:08:19,727 INFO L82 PathProgramCache]: Analyzing trace with hash 511639243, now seen corresponding path program 1 times [2019-10-15 00:08:19,727 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:08:19,728 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138011843] [2019-10-15 00:08:19,728 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:08:19,728 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:08:19,728 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:08:19,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:08:19,969 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:08:19,970 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138011843] [2019-10-15 00:08:19,971 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:08:19,971 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-15 00:08:19,972 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692953584] [2019-10-15 00:08:19,973 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-15 00:08:19,974 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:08:19,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-15 00:08:19,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-15 00:08:19,975 INFO L87 Difference]: Start difference. First operand 5896 states and 8054 transitions. Second operand 6 states. [2019-10-15 00:08:22,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:08:22,638 INFO L93 Difference]: Finished difference Result 14575 states and 20025 transitions. [2019-10-15 00:08:22,639 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 00:08:22,639 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 230 [2019-10-15 00:08:22,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:08:22,677 INFO L225 Difference]: With dead ends: 14575 [2019-10-15 00:08:22,677 INFO L226 Difference]: Without dead ends: 8685 [2019-10-15 00:08:22,693 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 [2019-10-15 00:08:22,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8685 states. [2019-10-15 00:08:22,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8685 to 8651. [2019-10-15 00:08:22,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8651 states. [2019-10-15 00:08:22,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8651 states to 8651 states and 11412 transitions. [2019-10-15 00:08:22,888 INFO L78 Accepts]: Start accepts. Automaton has 8651 states and 11412 transitions. Word has length 230 [2019-10-15 00:08:22,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:08:22,889 INFO L462 AbstractCegarLoop]: Abstraction has 8651 states and 11412 transitions. [2019-10-15 00:08:22,889 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-15 00:08:22,890 INFO L276 IsEmpty]: Start isEmpty. Operand 8651 states and 11412 transitions. [2019-10-15 00:08:22,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2019-10-15 00:08:22,896 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:08:22,896 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 00:08:22,896 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:08:22,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:08:22,897 INFO L82 PathProgramCache]: Analyzing trace with hash -71690297, now seen corresponding path program 1 times [2019-10-15 00:08:22,897 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:08:22,897 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975995447] [2019-10-15 00:08:22,898 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:08:22,898 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:08:22,898 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:08:22,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:08:23,084 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 123 proven. 0 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2019-10-15 00:08:23,085 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975995447] [2019-10-15 00:08:23,086 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:08:23,086 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-15 00:08:23,086 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739025556] [2019-10-15 00:08:23,087 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 00:08:23,087 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:08:23,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 00:08:23,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-15 00:08:23,088 INFO L87 Difference]: Start difference. First operand 8651 states and 11412 transitions. Second operand 4 states. [2019-10-15 00:08:26,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:08:26,384 INFO L93 Difference]: Finished difference Result 23062 states and 30672 transitions. [2019-10-15 00:08:26,385 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 00:08:26,385 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 266 [2019-10-15 00:08:26,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:08:26,434 INFO L225 Difference]: With dead ends: 23062 [2019-10-15 00:08:26,435 INFO L226 Difference]: Without dead ends: 14417 [2019-10-15 00:08:26,456 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-15 00:08:26,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14417 states. [2019-10-15 00:08:26,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14417 to 13741. [2019-10-15 00:08:26,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13741 states. [2019-10-15 00:08:26,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13741 states to 13741 states and 17133 transitions. [2019-10-15 00:08:26,763 INFO L78 Accepts]: Start accepts. Automaton has 13741 states and 17133 transitions. Word has length 266 [2019-10-15 00:08:26,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:08:26,765 INFO L462 AbstractCegarLoop]: Abstraction has 13741 states and 17133 transitions. [2019-10-15 00:08:26,765 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 00:08:26,765 INFO L276 IsEmpty]: Start isEmpty. Operand 13741 states and 17133 transitions. [2019-10-15 00:08:26,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 490 [2019-10-15 00:08:26,792 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:08:26,792 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 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, 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, 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] [2019-10-15 00:08:26,793 INFO L410 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:08:26,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:08:26,793 INFO L82 PathProgramCache]: Analyzing trace with hash 1075441394, now seen corresponding path program 1 times [2019-10-15 00:08:26,793 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:08:26,794 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938277965] [2019-10-15 00:08:26,794 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:08:26,794 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:08:26,794 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:08:26,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:08:27,346 INFO L134 CoverageAnalysis]: Checked inductivity of 303 backedges. 0 proven. 123 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2019-10-15 00:08:27,346 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938277965] [2019-10-15 00:08:27,347 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1622528502] [2019-10-15 00:08:27,347 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 [2019-10-15 00:08:27,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:08:27,490 INFO L256 TraceCheckSpWp]: Trace formula consists of 673 conjuncts, 18 conjunts are in the unsatisfiable core [2019-10-15 00:08:27,511 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 00:08:27,760 WARN L191 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 42 [2019-10-15 00:08:28,094 INFO L134 CoverageAnalysis]: Checked inductivity of 303 backedges. 0 proven. 123 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2019-10-15 00:08:28,094 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 00:08:28,154 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 00:08:28,155 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 00:08:28,159 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 00:08:28,319 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 00:08:28,320 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 00:08:28,321 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 00:08:28,487 WARN L191 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 34 [2019-10-15 00:08:30,626 INFO L134 CoverageAnalysis]: Checked inductivity of 303 backedges. 0 proven. 123 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2019-10-15 00:08:30,626 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [400770359] [2019-10-15 00:08:30,631 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 490 [2019-10-15 00:08:30,720 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-15 00:08:30,720 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2)