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/Problem15_label42.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 00:07:33,151 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 00:07:33,154 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 00:07:33,166 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 00:07:33,167 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 00:07:33,168 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 00:07:33,169 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 00:07:33,171 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 00:07:33,173 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 00:07:33,174 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 00:07:33,175 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 00:07:33,177 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 00:07:33,177 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 00:07:33,178 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 00:07:33,179 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 00:07:33,180 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 00:07:33,181 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 00:07:33,182 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 00:07:33,184 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 00:07:33,186 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 00:07:33,188 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 00:07:33,189 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 00:07:33,190 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 00:07:33,191 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 00:07:33,194 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 00:07:33,203 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 00:07:33,204 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 00:07:33,205 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 00:07:33,206 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 00:07:33,230 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 00:07:33,231 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 00:07:33,232 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 00:07:33,232 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 00:07:33,233 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 00:07:33,233 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 00:07:33,233 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 00:07:33,234 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 00:07:33,234 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 00:07:33,234 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 00:07:33,235 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 00:07:33,235 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 00:07:33,236 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 00:07:33,236 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 00:07:33,236 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 00:07:33,236 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 00:07:33,237 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 00:07:33,237 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 00:07:33,237 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 00:07:33,237 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 00:07:33,238 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 00:07:33,238 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 00:07:33,238 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 00:07:33,238 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 00:07:33,239 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 00:07:33,239 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 00:07:33,239 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 00:07:33,239 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 00:07:33,239 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 00:07:33,537 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 00:07:33,554 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 00:07:33,558 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 00:07:33,559 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 00:07:33,560 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 00:07:33,561 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem15_label42.c [2019-10-15 00:07:33,630 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/88fd8ac1e/5e5bcc1d4dd24ec18116b9df51fd43ce/FLAGf5481ea1d [2019-10-15 00:07:34,261 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 00:07:34,262 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem15_label42.c [2019-10-15 00:07:34,285 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/88fd8ac1e/5e5bcc1d4dd24ec18116b9df51fd43ce/FLAGf5481ea1d [2019-10-15 00:07:34,503 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/88fd8ac1e/5e5bcc1d4dd24ec18116b9df51fd43ce [2019-10-15 00:07:34,512 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 00:07:34,513 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 00:07:34,514 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 00:07:34,514 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 00:07:34,519 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 00:07:34,520 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 12:07:34" (1/1) ... [2019-10-15 00:07:34,523 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4c9fb768 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:07:34, skipping insertion in model container [2019-10-15 00:07:34,523 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 12:07:34" (1/1) ... [2019-10-15 00:07:34,530 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 00:07:34,615 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 00:07:35,752 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 00:07:35,769 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 00:07:36,164 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 00:07:36,186 INFO L192 MainTranslator]: Completed translation [2019-10-15 00:07:36,186 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:07:36 WrapperNode [2019-10-15 00:07:36,187 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 00:07:36,188 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 00:07:36,188 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 00:07:36,189 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 00:07:36,205 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:07:36" (1/1) ... [2019-10-15 00:07:36,206 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:07:36" (1/1) ... [2019-10-15 00:07:36,253 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:07:36" (1/1) ... [2019-10-15 00:07:36,254 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:07:36" (1/1) ... [2019-10-15 00:07:36,328 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:07:36" (1/1) ... [2019-10-15 00:07:36,346 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:07:36" (1/1) ... [2019-10-15 00:07:36,369 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:07:36" (1/1) ... [2019-10-15 00:07:36,392 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 00:07:36,393 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 00:07:36,393 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 00:07:36,393 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 00:07:36,395 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:07:36" (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 00:07:36,461 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 00:07:36,462 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 00:07:36,462 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-15 00:07:36,462 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-10-15 00:07:36,462 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 00:07:36,463 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-15 00:07:36,463 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-10-15 00:07:36,463 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 00:07:36,463 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 00:07:36,463 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-15 00:07:36,464 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 00:07:36,464 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 00:07:36,464 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 00:07:40,709 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 00:07:40,709 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-15 00:07:40,711 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 12:07:40 BoogieIcfgContainer [2019-10-15 00:07:40,711 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 00:07:40,712 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 00:07:40,712 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 00:07:40,716 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 00:07:40,716 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 12:07:34" (1/3) ... [2019-10-15 00:07:40,718 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@170910cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 12:07:40, skipping insertion in model container [2019-10-15 00:07:40,718 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:07:36" (2/3) ... [2019-10-15 00:07:40,719 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@170910cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 12:07:40, skipping insertion in model container [2019-10-15 00:07:40,719 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 12:07:40" (3/3) ... [2019-10-15 00:07:40,721 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem15_label42.c [2019-10-15 00:07:40,733 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 00:07:40,741 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 00:07:40,753 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 00:07:40,782 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 00:07:40,782 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 00:07:40,783 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 00:07:40,783 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 00:07:40,783 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 00:07:40,783 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 00:07:40,783 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 00:07:40,783 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 00:07:40,811 INFO L276 IsEmpty]: Start isEmpty. Operand 437 states. [2019-10-15 00:07:40,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2019-10-15 00:07:40,821 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:07:40,822 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] [2019-10-15 00:07:40,825 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:07:40,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:07:40,832 INFO L82 PathProgramCache]: Analyzing trace with hash 2044127672, now seen corresponding path program 1 times [2019-10-15 00:07:40,841 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:07:40,842 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981012370] [2019-10-15 00:07:40,842 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:07:40,842 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:07:40,843 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:07:40,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:07:41,213 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 00:07:41,214 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981012370] [2019-10-15 00:07:41,215 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:07:41,215 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-15 00:07:41,215 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257557267] [2019-10-15 00:07:41,220 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 00:07:41,222 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:07:41,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 00:07:41,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-15 00:07:41,240 INFO L87 Difference]: Start difference. First operand 437 states. Second operand 4 states. [2019-10-15 00:07:46,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:07:46,214 INFO L93 Difference]: Finished difference Result 1554 states and 2845 transitions. [2019-10-15 00:07:46,215 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 00:07:46,217 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 52 [2019-10-15 00:07:46,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:07:46,295 INFO L225 Difference]: With dead ends: 1554 [2019-10-15 00:07:46,296 INFO L226 Difference]: Without dead ends: 1036 [2019-10-15 00:07:46,308 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 00:07:46,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1036 states. [2019-10-15 00:07:46,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1036 to 1013. [2019-10-15 00:07:46,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1013 states. [2019-10-15 00:07:46,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1013 states to 1013 states and 1638 transitions. [2019-10-15 00:07:46,456 INFO L78 Accepts]: Start accepts. Automaton has 1013 states and 1638 transitions. Word has length 52 [2019-10-15 00:07:46,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:07:46,459 INFO L462 AbstractCegarLoop]: Abstraction has 1013 states and 1638 transitions. [2019-10-15 00:07:46,459 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 00:07:46,459 INFO L276 IsEmpty]: Start isEmpty. Operand 1013 states and 1638 transitions. [2019-10-15 00:07:46,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2019-10-15 00:07:46,472 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:07:46,473 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:07:46,474 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:07:46,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:07:46,474 INFO L82 PathProgramCache]: Analyzing trace with hash 147073843, now seen corresponding path program 1 times [2019-10-15 00:07:46,475 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:07:46,475 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390527203] [2019-10-15 00:07:46,475 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:07:46,475 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:07:46,475 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:07:46,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:07:46,724 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:07:46,726 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390527203] [2019-10-15 00:07:46,726 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:07:46,726 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-15 00:07:46,726 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572907418] [2019-10-15 00:07:46,734 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-15 00:07:46,735 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:07:46,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-15 00:07:46,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-15 00:07:46,735 INFO L87 Difference]: Start difference. First operand 1013 states and 1638 transitions. Second operand 5 states. [2019-10-15 00:07:50,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:07:50,246 INFO L93 Difference]: Finished difference Result 3003 states and 4930 transitions. [2019-10-15 00:07:50,247 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-15 00:07:50,247 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 124 [2019-10-15 00:07:50,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:07:50,264 INFO L225 Difference]: With dead ends: 3003 [2019-10-15 00:07:50,265 INFO L226 Difference]: Without dead ends: 1996 [2019-10-15 00:07:50,269 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-10-15 00:07:50,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1996 states. [2019-10-15 00:07:50,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1996 to 1958. [2019-10-15 00:07:50,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1958 states. [2019-10-15 00:07:50,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1958 states to 1958 states and 2746 transitions. [2019-10-15 00:07:50,351 INFO L78 Accepts]: Start accepts. Automaton has 1958 states and 2746 transitions. Word has length 124 [2019-10-15 00:07:50,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:07:50,354 INFO L462 AbstractCegarLoop]: Abstraction has 1958 states and 2746 transitions. [2019-10-15 00:07:50,354 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-15 00:07:50,355 INFO L276 IsEmpty]: Start isEmpty. Operand 1958 states and 2746 transitions. [2019-10-15 00:07:50,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2019-10-15 00:07:50,365 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:07:50,365 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:07:50,365 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:07:50,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:07:50,367 INFO L82 PathProgramCache]: Analyzing trace with hash -855279069, now seen corresponding path program 1 times [2019-10-15 00:07:50,367 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:07:50,368 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334834968] [2019-10-15 00:07:50,369 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:07:50,369 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:07:50,369 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:07:50,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:07:50,571 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:07:50,571 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334834968] [2019-10-15 00:07:50,571 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:07:50,572 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-15 00:07:50,572 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83641332] [2019-10-15 00:07:50,574 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 00:07:50,574 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:07:50,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 00:07:50,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-15 00:07:50,578 INFO L87 Difference]: Start difference. First operand 1958 states and 2746 transitions. Second operand 4 states. [2019-10-15 00:07:54,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:07:54,605 INFO L93 Difference]: Finished difference Result 7620 states and 10955 transitions. [2019-10-15 00:07:54,605 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 00:07:54,605 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 132 [2019-10-15 00:07:54,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:07:54,638 INFO L225 Difference]: With dead ends: 7620 [2019-10-15 00:07:54,647 INFO L226 Difference]: Without dead ends: 5668 [2019-10-15 00:07:54,655 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 00:07:54,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5668 states. [2019-10-15 00:07:54,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5668 to 5666. [2019-10-15 00:07:54,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5666 states. [2019-10-15 00:07:54,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5666 states to 5666 states and 7447 transitions. [2019-10-15 00:07:54,867 INFO L78 Accepts]: Start accepts. Automaton has 5666 states and 7447 transitions. Word has length 132 [2019-10-15 00:07:54,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:07:54,868 INFO L462 AbstractCegarLoop]: Abstraction has 5666 states and 7447 transitions. [2019-10-15 00:07:54,869 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 00:07:54,869 INFO L276 IsEmpty]: Start isEmpty. Operand 5666 states and 7447 transitions. [2019-10-15 00:07:54,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2019-10-15 00:07:54,874 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:07:54,875 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, 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] [2019-10-15 00:07:54,875 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:07:54,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:07:54,876 INFO L82 PathProgramCache]: Analyzing trace with hash -1795663703, now seen corresponding path program 1 times [2019-10-15 00:07:54,876 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:07:54,876 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93646280] [2019-10-15 00:07:54,876 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:07:54,876 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:07:54,877 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:07:54,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:07:55,102 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 90 proven. 65 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-15 00:07:55,103 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93646280] [2019-10-15 00:07:55,103 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1962507931] [2019-10-15 00:07:55,104 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 00:07:55,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:07:55,216 INFO L256 TraceCheckSpWp]: Trace formula consists of 402 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-15 00:07:55,229 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 00:07:55,403 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 113 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2019-10-15 00:07:55,404 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 00:07:55,606 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 90 proven. 65 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-15 00:07:55,606 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 00:07:55,607 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 11 [2019-10-15 00:07:55,607 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541744223] [2019-10-15 00:07:55,608 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-15 00:07:55,609 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:07:55,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-15 00:07:55,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2019-10-15 00:07:55,609 INFO L87 Difference]: Start difference. First operand 5666 states and 7447 transitions. Second operand 5 states. [2019-10-15 00:07:59,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:07:59,889 INFO L93 Difference]: Finished difference Result 11445 states and 15158 transitions. [2019-10-15 00:07:59,893 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-15 00:07:59,893 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 220 [2019-10-15 00:07:59,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:07:59,919 INFO L225 Difference]: With dead ends: 11445 [2019-10-15 00:07:59,919 INFO L226 Difference]: Without dead ends: 5785 [2019-10-15 00:07:59,932 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 449 GetRequests, 435 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2019-10-15 00:07:59,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5785 states. [2019-10-15 00:08:00,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5785 to 5458. [2019-10-15 00:08:00,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5458 states. [2019-10-15 00:08:00,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5458 states to 5458 states and 6692 transitions. [2019-10-15 00:08:00,073 INFO L78 Accepts]: Start accepts. Automaton has 5458 states and 6692 transitions. Word has length 220 [2019-10-15 00:08:00,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:08:00,075 INFO L462 AbstractCegarLoop]: Abstraction has 5458 states and 6692 transitions. [2019-10-15 00:08:00,075 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-15 00:08:00,075 INFO L276 IsEmpty]: Start isEmpty. Operand 5458 states and 6692 transitions. [2019-10-15 00:08:00,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 373 [2019-10-15 00:08:00,082 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:08:00,083 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:08:00,285 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 00:08:00,285 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:08:00,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:08:00,286 INFO L82 PathProgramCache]: Analyzing trace with hash 1319110833, now seen corresponding path program 1 times [2019-10-15 00:08:00,286 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:08:00,286 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917924837] [2019-10-15 00:08:00,286 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:08:00,287 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:08:00,287 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:08:00,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:08:00,970 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 111 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:08:00,972 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917924837] [2019-10-15 00:08:00,973 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [709233326] [2019-10-15 00:08:00,973 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 00:08:01,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:08:01,106 INFO L256 TraceCheckSpWp]: Trace formula consists of 548 conjuncts, 16 conjunts are in the unsatisfiable core [2019-10-15 00:08:01,131 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 00:08:01,191 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-10-15 00:08:01,398 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 113 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2019-10-15 00:08:01,398 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 00:08:01,502 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 00:08:01,503 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 00:08:01,551 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 00:08:01,552 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 00:08:01,552 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 00:08:01,755 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 00:08:02,505 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 90 proven. 65 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-15 00:08:02,506 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 00:08:02,506 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8, 5] total 13 [2019-10-15 00:08:02,506 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219312061] [2019-10-15 00:08:02,507 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-15 00:08:02,507 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:08:02,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-15 00:08:02,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2019-10-15 00:08:02,508 INFO L87 Difference]: Start difference. First operand 5458 states and 6692 transitions. Second operand 5 states. [2019-10-15 00:08:07,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:08:07,035 INFO L93 Difference]: Finished difference Result 11345 states and 13939 transitions. [2019-10-15 00:08:07,036 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 00:08:07,036 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 372 [2019-10-15 00:08:07,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:08:07,062 INFO L225 Difference]: With dead ends: 11345 [2019-10-15 00:08:07,063 INFO L226 Difference]: Without dead ends: 5893 [2019-10-15 00:08:07,076 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 754 GetRequests, 740 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2019-10-15 00:08:07,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5893 states. [2019-10-15 00:08:07,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5893 to 5525. [2019-10-15 00:08:07,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5525 states. [2019-10-15 00:08:07,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5525 states to 5525 states and 6781 transitions. [2019-10-15 00:08:07,219 INFO L78 Accepts]: Start accepts. Automaton has 5525 states and 6781 transitions. Word has length 372 [2019-10-15 00:08:07,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:08:07,221 INFO L462 AbstractCegarLoop]: Abstraction has 5525 states and 6781 transitions. [2019-10-15 00:08:07,221 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-15 00:08:07,221 INFO L276 IsEmpty]: Start isEmpty. Operand 5525 states and 6781 transitions. [2019-10-15 00:08:07,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 408 [2019-10-15 00:08:07,234 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:08:07,234 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:08:07,444 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 00:08:07,445 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:08:07,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:08:07,445 INFO L82 PathProgramCache]: Analyzing trace with hash 1389844065, now seen corresponding path program 1 times [2019-10-15 00:08:07,446 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:08:07,446 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683956134] [2019-10-15 00:08:07,446 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:08:07,446 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:08:07,446 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:08:07,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:08:07,998 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2019-10-15 00:08:07,998 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683956134] [2019-10-15 00:08:07,999 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1455103696] [2019-10-15 00:08:07,999 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 00:08:08,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:08:08,131 INFO L256 TraceCheckSpWp]: Trace formula consists of 585 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-15 00:08:08,139 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 00:08:08,181 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 00:08:08,182 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 00:08:08,183 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 00:08:08,184 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 00:08:08,184 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 00:08:08,185 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 00:08:08,187 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 00:08:08,188 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms