/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --abstractinterpretationv2.abstract.domain IntervalDomain --traceabstraction.trace.refinement.strategy TAIPAN --traceabstraction.abstract.interpretation.mode USE_PREDICATES -i ../../../trunk/examples/svcomp/eca-rers2012/Problem01_label08.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 22:28:32,110 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 22:28:32,112 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 22:28:32,124 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-06 22:28:32,156 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-06 22:28:32,169 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 22:28:32,170 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 22:28:32,171 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 22:28:32,171 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 22:28:32,171 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 22:28:32,172 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 22:28:32,172 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 22:28:32,172 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 22:28:32,172 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 22:28:32,172 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 22:28:32,173 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 22:28:32,173 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 22:28:32,173 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 22:28:32,173 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 22:28:32,173 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 22:28:32,173 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 22:28:32,174 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 22:28:32,174 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 22:28:32,174 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 22:28:32,174 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 22:28:32,174 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 22:28:32,175 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 22:28:32,175 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 22:28:32,175 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 22:28:32,175 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 22:28:32,175 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 22:28:32,176 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 22:28:32,176 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 22:28:32,176 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2: Abstract domain -> IntervalDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Abstract interpretation Mode -> USE_PREDICATES [2019-11-06 22:28:32,446 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 22:28:32,458 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 22:28:32,462 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 22:28:32,463 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 22:28:32,463 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 22:28:32,464 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem01_label08.c [2019-11-06 22:28:32,527 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d588aa1a4/b6c107af36954518ace6acf1a73ac940/FLAGea0e74307 [2019-11-06 22:28:33,022 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 22:28:33,024 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem01_label08.c [2019-11-06 22:28:33,040 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d588aa1a4/b6c107af36954518ace6acf1a73ac940/FLAGea0e74307 [2019-11-06 22:28:33,293 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d588aa1a4/b6c107af36954518ace6acf1a73ac940 [2019-11-06 22:28:33,301 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 22:28:33,303 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 22:28:33,303 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 22:28:33,304 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 22:28:33,307 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 22:28:33,308 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:28:33" (1/1) ... [2019-11-06 22:28:33,311 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2406b1b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:28:33, skipping insertion in model container [2019-11-06 22:28:33,311 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:28:33" (1/1) ... [2019-11-06 22:28:33,318 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 22:28:33,374 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 22:28:33,904 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:28:33,909 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 22:28:34,029 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:28:34,046 INFO L192 MainTranslator]: Completed translation [2019-11-06 22:28:34,046 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:28:34 WrapperNode [2019-11-06 22:28:34,047 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 22:28:34,047 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 22:28:34,047 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 22:28:34,048 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 22:28:34,062 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:28:34" (1/1) ... [2019-11-06 22:28:34,062 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:28:34" (1/1) ... [2019-11-06 22:28:34,092 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:28:34" (1/1) ... [2019-11-06 22:28:34,092 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:28:34" (1/1) ... [2019-11-06 22:28:34,139 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:28:34" (1/1) ... [2019-11-06 22:28:34,162 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:28:34" (1/1) ... [2019-11-06 22:28:34,173 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:28:34" (1/1) ... [2019-11-06 22:28:34,182 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 22:28:34,183 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 22:28:34,183 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 22:28:34,183 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 22:28:34,184 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:28:34" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 22:28:34,241 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 22:28:34,241 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 22:28:34,241 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-06 22:28:34,241 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 22:28:34,241 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-06 22:28:34,242 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 22:28:34,242 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 22:28:34,242 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-06 22:28:34,242 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 22:28:34,242 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 22:28:34,242 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 22:28:35,322 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 22:28:35,323 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-06 22:28:35,324 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:28:35 BoogieIcfgContainer [2019-11-06 22:28:35,324 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 22:28:35,325 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 22:28:35,325 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 22:28:35,328 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 22:28:35,329 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:28:33" (1/3) ... [2019-11-06 22:28:35,329 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e28056e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:28:35, skipping insertion in model container [2019-11-06 22:28:35,329 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:28:34" (2/3) ... [2019-11-06 22:28:35,330 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e28056e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:28:35, skipping insertion in model container [2019-11-06 22:28:35,330 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:28:35" (3/3) ... [2019-11-06 22:28:35,332 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem01_label08.c [2019-11-06 22:28:35,341 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 22:28:35,349 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 22:28:35,361 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 22:28:35,389 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 22:28:35,390 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 22:28:35,390 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 22:28:35,390 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 22:28:35,390 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 22:28:35,391 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 22:28:35,391 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 22:28:35,391 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 22:28:35,415 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states. [2019-11-06 22:28:35,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2019-11-06 22:28:35,428 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:28:35,429 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:28:35,431 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:28:35,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:28:35,438 INFO L82 PathProgramCache]: Analyzing trace with hash -1920403729, now seen corresponding path program 1 times [2019-11-06 22:28:35,447 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:28:35,447 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083352744] [2019-11-06 22:28:35,448 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:28:35,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:28:35,939 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:28:35,940 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083352744] [2019-11-06 22:28:35,941 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:28:35,941 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-06 22:28:35,943 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189424395] [2019-11-06 22:28:35,948 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 22:28:35,950 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:28:35,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 22:28:35,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 22:28:35,967 INFO L87 Difference]: Start difference. First operand 207 states. Second operand 3 states. [2019-11-06 22:28:36,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:28:36,815 INFO L93 Difference]: Finished difference Result 547 states and 938 transitions. [2019-11-06 22:28:36,815 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 22:28:36,816 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 119 [2019-11-06 22:28:36,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:28:36,831 INFO L225 Difference]: With dead ends: 547 [2019-11-06 22:28:36,832 INFO L226 Difference]: Without dead ends: 278 [2019-11-06 22:28:36,838 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 3 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 22:28:36,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2019-11-06 22:28:36,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 278. [2019-11-06 22:28:36,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 278 states. [2019-11-06 22:28:36,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 394 transitions. [2019-11-06 22:28:36,902 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 394 transitions. Word has length 119 [2019-11-06 22:28:36,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:28:36,903 INFO L462 AbstractCegarLoop]: Abstraction has 278 states and 394 transitions. [2019-11-06 22:28:36,903 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 22:28:36,904 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 394 transitions. [2019-11-06 22:28:36,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2019-11-06 22:28:36,907 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:28:36,908 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:28:36,908 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:28:36,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:28:36,909 INFO L82 PathProgramCache]: Analyzing trace with hash 10659704, now seen corresponding path program 1 times [2019-11-06 22:28:36,909 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:28:36,909 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078545463] [2019-11-06 22:28:36,910 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:28:36,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:28:37,024 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:28:37,025 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078545463] [2019-11-06 22:28:37,025 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:28:37,025 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-06 22:28:37,026 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278545586] [2019-11-06 22:28:37,028 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 22:28:37,028 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:28:37,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 22:28:37,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:28:37,029 INFO L87 Difference]: Start difference. First operand 278 states and 394 transitions. Second operand 6 states. [2019-11-06 22:28:37,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:28:37,818 INFO L93 Difference]: Finished difference Result 840 states and 1222 transitions. [2019-11-06 22:28:37,820 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 22:28:37,820 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 129 [2019-11-06 22:28:37,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:28:37,827 INFO L225 Difference]: With dead ends: 840 [2019-11-06 22:28:37,827 INFO L226 Difference]: Without dead ends: 568 [2019-11-06 22:28:37,829 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-11-06 22:28:37,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 568 states. [2019-11-06 22:28:37,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 568 to 556. [2019-11-06 22:28:37,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 556 states. [2019-11-06 22:28:37,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 556 states to 556 states and 785 transitions. [2019-11-06 22:28:37,885 INFO L78 Accepts]: Start accepts. Automaton has 556 states and 785 transitions. Word has length 129 [2019-11-06 22:28:37,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:28:37,885 INFO L462 AbstractCegarLoop]: Abstraction has 556 states and 785 transitions. [2019-11-06 22:28:37,885 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 22:28:37,886 INFO L276 IsEmpty]: Start isEmpty. Operand 556 states and 785 transitions. [2019-11-06 22:28:37,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2019-11-06 22:28:37,890 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:28:37,890 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:28:37,891 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:28:37,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:28:37,891 INFO L82 PathProgramCache]: Analyzing trace with hash -1525536778, now seen corresponding path program 1 times [2019-11-06 22:28:37,891 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:28:37,892 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422916586] [2019-11-06 22:28:37,892 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:28:37,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:28:38,199 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:28:38,200 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422916586] [2019-11-06 22:28:38,200 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:28:38,200 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-06 22:28:38,200 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843855996] [2019-11-06 22:28:38,201 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 22:28:38,201 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:28:38,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 22:28:38,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-06 22:28:38,202 INFO L87 Difference]: Start difference. First operand 556 states and 785 transitions. Second operand 5 states. [2019-11-06 22:28:38,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:28:38,866 INFO L93 Difference]: Finished difference Result 1205 states and 1730 transitions. [2019-11-06 22:28:38,867 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 22:28:38,867 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 130 [2019-11-06 22:28:38,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:28:38,872 INFO L225 Difference]: With dead ends: 1205 [2019-11-06 22:28:38,872 INFO L226 Difference]: Without dead ends: 554 [2019-11-06 22:28:38,873 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-06 22:28:38,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 554 states. [2019-11-06 22:28:38,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 554 to 554. [2019-11-06 22:28:38,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 554 states. [2019-11-06 22:28:38,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 554 states to 554 states and 712 transitions. [2019-11-06 22:28:38,914 INFO L78 Accepts]: Start accepts. Automaton has 554 states and 712 transitions. Word has length 130 [2019-11-06 22:28:38,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:28:38,915 INFO L462 AbstractCegarLoop]: Abstraction has 554 states and 712 transitions. [2019-11-06 22:28:38,915 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 22:28:38,915 INFO L276 IsEmpty]: Start isEmpty. Operand 554 states and 712 transitions. [2019-11-06 22:28:38,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2019-11-06 22:28:38,919 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:28:38,920 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:28:38,920 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:28:38,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:28:38,921 INFO L82 PathProgramCache]: Analyzing trace with hash -1052025540, now seen corresponding path program 1 times [2019-11-06 22:28:38,921 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:28:38,922 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106628582] [2019-11-06 22:28:38,922 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:28:38,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:28:39,250 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:28:39,250 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106628582] [2019-11-06 22:28:39,250 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:28:39,251 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-06 22:28:39,251 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369293972] [2019-11-06 22:28:39,251 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 22:28:39,251 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:28:39,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 22:28:39,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-06 22:28:39,252 INFO L87 Difference]: Start difference. First operand 554 states and 712 transitions. Second operand 5 states. [2019-11-06 22:28:39,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:28:39,847 INFO L93 Difference]: Finished difference Result 1184 states and 1552 transitions. [2019-11-06 22:28:39,847 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 22:28:39,848 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 131 [2019-11-06 22:28:39,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:28:39,852 INFO L225 Difference]: With dead ends: 1184 [2019-11-06 22:28:39,852 INFO L226 Difference]: Without dead ends: 554 [2019-11-06 22:28:39,854 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 3 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-06 22:28:39,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 554 states. [2019-11-06 22:28:39,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 554 to 554. [2019-11-06 22:28:39,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 554 states. [2019-11-06 22:28:39,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 554 states to 554 states and 708 transitions. [2019-11-06 22:28:39,880 INFO L78 Accepts]: Start accepts. Automaton has 554 states and 708 transitions. Word has length 131 [2019-11-06 22:28:39,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:28:39,880 INFO L462 AbstractCegarLoop]: Abstraction has 554 states and 708 transitions. [2019-11-06 22:28:39,880 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 22:28:39,880 INFO L276 IsEmpty]: Start isEmpty. Operand 554 states and 708 transitions. [2019-11-06 22:28:39,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2019-11-06 22:28:39,883 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:28:39,883 INFO L410 BasicCegarLoop]: trace histogram [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] [2019-11-06 22:28:39,883 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:28:39,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:28:39,884 INFO L82 PathProgramCache]: Analyzing trace with hash -866015874, now seen corresponding path program 1 times [2019-11-06 22:28:39,884 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:28:39,884 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548782132] [2019-11-06 22:28:39,884 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:28:39,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:28:40,047 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:28:40,048 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548782132] [2019-11-06 22:28:40,049 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:28:40,049 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-06 22:28:40,050 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751312019] [2019-11-06 22:28:40,051 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 22:28:40,052 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:28:40,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 22:28:40,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 22:28:40,053 INFO L87 Difference]: Start difference. First operand 554 states and 708 transitions. Second operand 3 states. [2019-11-06 22:28:40,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:28:40,538 INFO L93 Difference]: Finished difference Result 1509 states and 1954 transitions. [2019-11-06 22:28:40,539 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 22:28:40,540 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 134 [2019-11-06 22:28:40,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:28:40,546 INFO L225 Difference]: With dead ends: 1509 [2019-11-06 22:28:40,546 INFO L226 Difference]: Without dead ends: 961 [2019-11-06 22:28:40,549 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 22:28:40,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 961 states. [2019-11-06 22:28:40,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 961 to 959. [2019-11-06 22:28:40,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 959 states. [2019-11-06 22:28:40,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 959 states to 959 states and 1180 transitions. [2019-11-06 22:28:40,598 INFO L78 Accepts]: Start accepts. Automaton has 959 states and 1180 transitions. Word has length 134 [2019-11-06 22:28:40,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:28:40,600 INFO L462 AbstractCegarLoop]: Abstraction has 959 states and 1180 transitions. [2019-11-06 22:28:40,600 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 22:28:40,600 INFO L276 IsEmpty]: Start isEmpty. Operand 959 states and 1180 transitions. [2019-11-06 22:28:40,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2019-11-06 22:28:40,605 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:28:40,605 INFO L410 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:28:40,606 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:28:40,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:28:40,606 INFO L82 PathProgramCache]: Analyzing trace with hash -494413009, now seen corresponding path program 1 times [2019-11-06 22:28:40,606 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:28:40,606 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141494553] [2019-11-06 22:28:40,607 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:28:40,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:28:40,735 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 53 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:28:40,736 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141494553] [2019-11-06 22:28:40,736 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [133759624] [2019-11-06 22:28:40,736 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:28:40,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:28:40,862 INFO L256 TraceCheckSpWp]: Trace formula consists of 446 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-06 22:28:40,887 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:28:40,978 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 24 proven. 27 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-06 22:28:40,978 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:28:41,117 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 49 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-06 22:28:41,118 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [715207283] [2019-11-06 22:28:41,125 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 166 [2019-11-06 22:28:41,190 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-11-06 22:28:41,191 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2)