/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/Problem02_label50.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 22:36:40,841 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 22:36:40,844 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 22:36:40,862 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-06 22:36:40,863 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-06 22:36:40,865 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-06 22:36:40,867 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-06 22:36:40,876 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-06 22:36:40,879 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-06 22:36:40,883 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-06 22:36:40,884 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-06 22:36:40,886 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2019-11-06 22:36:40,925 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 22:36:40,960 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 22:36:40,960 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 22:36:40,961 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 22:36:40,961 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 22:36:40,962 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 22:36:40,965 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 22:36:40,965 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 22:36:40,965 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 22:36:40,966 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 22:36:40,966 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 22:36:40,966 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 22:36:40,966 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 22:36:40,966 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 22:36:40,966 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 22:36:40,967 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 22:36:40,967 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 22:36:40,967 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 22:36:40,967 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 22:36:40,967 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 22:36:40,970 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 22:36:40,971 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 22:36:40,971 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 22:36:40,971 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 22:36:40,971 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 22:36:40,972 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 22:36:40,972 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 22:36:40,972 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 22:36:40,972 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 22:36:40,972 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 22:36:41,244 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 22:36:41,268 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 22:36:41,271 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 22:36:41,273 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 22:36:41,273 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 22:36:41,274 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem02_label50.c [2019-11-06 22:36:41,344 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aa2a3d4d8/3af3991a24454ff8b39eb21ef379cbd0/FLAG5d2239af5 [2019-11-06 22:36:41,889 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 22:36:41,890 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem02_label50.c [2019-11-06 22:36:41,908 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aa2a3d4d8/3af3991a24454ff8b39eb21ef379cbd0/FLAG5d2239af5 [2019-11-06 22:36:42,182 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aa2a3d4d8/3af3991a24454ff8b39eb21ef379cbd0 [2019-11-06 22:36:42,194 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 22:36:42,195 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 22:36:42,197 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 22:36:42,197 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 22:36:42,200 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 22:36:42,201 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:36:42" (1/1) ... [2019-11-06 22:36:42,204 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5d04c9f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:36:42, skipping insertion in model container [2019-11-06 22:36:42,204 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:36:42" (1/1) ... [2019-11-06 22:36:42,213 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 22:36:42,274 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 22:36:42,816 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:36:42,829 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 22:36:42,956 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:36:42,981 INFO L192 MainTranslator]: Completed translation [2019-11-06 22:36:42,981 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:36:42 WrapperNode [2019-11-06 22:36:42,981 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 22:36:42,982 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 22:36:42,982 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 22:36:42,982 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 22:36:42,993 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:36:42" (1/1) ... [2019-11-06 22:36:42,993 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:36:42" (1/1) ... [2019-11-06 22:36:43,010 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:36:42" (1/1) ... [2019-11-06 22:36:43,010 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:36:42" (1/1) ... [2019-11-06 22:36:43,058 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:36:42" (1/1) ... [2019-11-06 22:36:43,073 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:36:42" (1/1) ... [2019-11-06 22:36:43,077 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:36:42" (1/1) ... [2019-11-06 22:36:43,084 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 22:36:43,084 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 22:36:43,085 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 22:36:43,085 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 22:36:43,086 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:36:42" (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 22:36:43,139 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 22:36:43,139 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 22:36:43,139 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-06 22:36:43,139 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 22:36:43,140 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-06 22:36:43,140 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 22:36:43,140 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 22:36:43,140 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-06 22:36:43,140 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 22:36:43,140 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 22:36:43,141 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 22:36:44,370 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 22:36:44,373 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-06 22:36:44,374 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:36:44 BoogieIcfgContainer [2019-11-06 22:36:44,374 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 22:36:44,376 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 22:36:44,377 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 22:36:44,382 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 22:36:44,382 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:36:42" (1/3) ... [2019-11-06 22:36:44,383 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7568cac4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:36:44, skipping insertion in model container [2019-11-06 22:36:44,383 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:36:42" (2/3) ... [2019-11-06 22:36:44,384 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7568cac4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:36:44, skipping insertion in model container [2019-11-06 22:36:44,385 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:36:44" (3/3) ... [2019-11-06 22:36:44,392 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem02_label50.c [2019-11-06 22:36:44,406 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 22:36:44,417 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 22:36:44,429 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 22:36:44,468 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 22:36:44,468 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 22:36:44,468 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 22:36:44,468 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 22:36:44,469 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 22:36:44,469 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 22:36:44,469 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 22:36:44,469 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 22:36:44,507 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states. [2019-11-06 22:36:44,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2019-11-06 22:36:44,523 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:36:44,524 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] [2019-11-06 22:36:44,527 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:36:44,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:36:44,535 INFO L82 PathProgramCache]: Analyzing trace with hash 1330544841, now seen corresponding path program 1 times [2019-11-06 22:36:44,550 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:36:44,550 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3337722] [2019-11-06 22:36:44,551 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:36:44,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:36:45,036 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 22:36:45,036 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3337722] [2019-11-06 22:36:45,037 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:36:45,038 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-06 22:36:45,040 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285192517] [2019-11-06 22:36:45,045 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 22:36:45,047 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:36:45,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 22:36:45,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 22:36:45,065 INFO L87 Difference]: Start difference. First operand 236 states. Second operand 3 states. [2019-11-06 22:36:46,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:36:46,044 INFO L93 Difference]: Finished difference Result 618 states and 1056 transitions. [2019-11-06 22:36:46,044 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 22:36:46,046 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 87 [2019-11-06 22:36:46,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:36:46,062 INFO L225 Difference]: With dead ends: 618 [2019-11-06 22:36:46,063 INFO L226 Difference]: Without dead ends: 320 [2019-11-06 22:36:46,070 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 2 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 22:36:46,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2019-11-06 22:36:46,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 320. [2019-11-06 22:36:46,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 320 states. [2019-11-06 22:36:46,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 465 transitions. [2019-11-06 22:36:46,150 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 465 transitions. Word has length 87 [2019-11-06 22:36:46,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:36:46,151 INFO L462 AbstractCegarLoop]: Abstraction has 320 states and 465 transitions. [2019-11-06 22:36:46,151 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 22:36:46,152 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 465 transitions. [2019-11-06 22:36:46,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2019-11-06 22:36:46,157 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:36:46,158 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:36:46,158 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:36:46,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:36:46,159 INFO L82 PathProgramCache]: Analyzing trace with hash 979586382, now seen corresponding path program 1 times [2019-11-06 22:36:46,159 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:36:46,159 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93833385] [2019-11-06 22:36:46,159 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:36:46,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:36:46,326 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:36:46,327 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93833385] [2019-11-06 22:36:46,327 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:36:46,327 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-06 22:36:46,328 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607459414] [2019-11-06 22:36:46,330 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 22:36:46,330 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:36:46,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 22:36:46,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 22:36:46,331 INFO L87 Difference]: Start difference. First operand 320 states and 465 transitions. Second operand 3 states. [2019-11-06 22:36:46,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:36:46,901 INFO L93 Difference]: Finished difference Result 931 states and 1377 transitions. [2019-11-06 22:36:46,902 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 22:36:46,902 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 95 [2019-11-06 22:36:46,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:36:46,907 INFO L225 Difference]: With dead ends: 931 [2019-11-06 22:36:46,908 INFO L226 Difference]: Without dead ends: 617 [2019-11-06 22:36:46,910 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 22:36:46,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 617 states. [2019-11-06 22:36:46,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 617 to 612. [2019-11-06 22:36:46,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 612 states. [2019-11-06 22:36:46,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 612 states to 612 states and 857 transitions. [2019-11-06 22:36:46,948 INFO L78 Accepts]: Start accepts. Automaton has 612 states and 857 transitions. Word has length 95 [2019-11-06 22:36:46,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:36:46,949 INFO L462 AbstractCegarLoop]: Abstraction has 612 states and 857 transitions. [2019-11-06 22:36:46,949 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 22:36:46,949 INFO L276 IsEmpty]: Start isEmpty. Operand 612 states and 857 transitions. [2019-11-06 22:36:46,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2019-11-06 22:36:46,956 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:36:46,956 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:36:46,957 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:36:46,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:36:46,957 INFO L82 PathProgramCache]: Analyzing trace with hash -2117634278, now seen corresponding path program 1 times [2019-11-06 22:36:46,958 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:36:46,958 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723895188] [2019-11-06 22:36:46,958 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:36:46,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:36:47,097 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:36:47,097 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723895188] [2019-11-06 22:36:47,098 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:36:47,099 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-06 22:36:47,099 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493921448] [2019-11-06 22:36:47,100 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 22:36:47,101 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:36:47,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 22:36:47,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:36:47,102 INFO L87 Difference]: Start difference. First operand 612 states and 857 transitions. Second operand 6 states. [2019-11-06 22:36:47,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:36:47,987 INFO L93 Difference]: Finished difference Result 1834 states and 2681 transitions. [2019-11-06 22:36:47,987 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 22:36:47,988 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 101 [2019-11-06 22:36:47,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:36:47,997 INFO L225 Difference]: With dead ends: 1834 [2019-11-06 22:36:47,997 INFO L226 Difference]: Without dead ends: 1228 [2019-11-06 22:36:48,000 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2019-11-06 22:36:48,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1228 states. [2019-11-06 22:36:48,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1228 to 1212. [2019-11-06 22:36:48,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1212 states. [2019-11-06 22:36:48,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1212 states to 1212 states and 1654 transitions. [2019-11-06 22:36:48,076 INFO L78 Accepts]: Start accepts. Automaton has 1212 states and 1654 transitions. Word has length 101 [2019-11-06 22:36:48,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:36:48,076 INFO L462 AbstractCegarLoop]: Abstraction has 1212 states and 1654 transitions. [2019-11-06 22:36:48,076 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 22:36:48,077 INFO L276 IsEmpty]: Start isEmpty. Operand 1212 states and 1654 transitions. [2019-11-06 22:36:48,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2019-11-06 22:36:48,081 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:36:48,082 INFO L410 BasicCegarLoop]: trace histogram [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] [2019-11-06 22:36:48,082 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:36:48,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:36:48,083 INFO L82 PathProgramCache]: Analyzing trace with hash 2096741041, now seen corresponding path program 1 times [2019-11-06 22:36:48,083 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:36:48,083 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246077385] [2019-11-06 22:36:48,083 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:36:48,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:36:48,187 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:36:48,187 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246077385] [2019-11-06 22:36:48,188 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:36:48,188 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-06 22:36:48,188 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092824264] [2019-11-06 22:36:48,190 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 22:36:48,190 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:36:48,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 22:36:48,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:36:48,192 INFO L87 Difference]: Start difference. First operand 1212 states and 1654 transitions. Second operand 6 states. [2019-11-06 22:36:49,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:36:49,219 INFO L93 Difference]: Finished difference Result 3038 states and 4246 transitions. [2019-11-06 22:36:49,221 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 22:36:49,221 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 109 [2019-11-06 22:36:49,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:36:49,238 INFO L225 Difference]: With dead ends: 3038 [2019-11-06 22:36:49,238 INFO L226 Difference]: Without dead ends: 1832 [2019-11-06 22:36:49,243 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 22:36:49,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1832 states. [2019-11-06 22:36:49,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1832 to 1814. [2019-11-06 22:36:49,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1814 states. [2019-11-06 22:36:49,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1814 states to 1814 states and 2426 transitions. [2019-11-06 22:36:49,332 INFO L78 Accepts]: Start accepts. Automaton has 1814 states and 2426 transitions. Word has length 109 [2019-11-06 22:36:49,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:36:49,332 INFO L462 AbstractCegarLoop]: Abstraction has 1814 states and 2426 transitions. [2019-11-06 22:36:49,333 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 22:36:49,333 INFO L276 IsEmpty]: Start isEmpty. Operand 1814 states and 2426 transitions. [2019-11-06 22:36:49,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2019-11-06 22:36:49,338 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:36:49,338 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2019-11-06 22:36:49,338 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:36:49,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:36:49,339 INFO L82 PathProgramCache]: Analyzing trace with hash 1866094056, now seen corresponding path program 1 times [2019-11-06 22:36:49,339 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:36:49,340 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341498104] [2019-11-06 22:36:49,340 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:36:49,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:36:49,565 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 29 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-11-06 22:36:49,566 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341498104] [2019-11-06 22:36:49,566 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [133617282] [2019-11-06 22:36:49,566 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 22:36:49,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:36:49,656 INFO L256 TraceCheckSpWp]: Trace formula consists of 379 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 22:36:49,667 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:36:49,751 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-11-06 22:36:49,751 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:36:49,821 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-11-06 22:36:49,821 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-06 22:36:49,822 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5] total 6 [2019-11-06 22:36:49,822 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482494153] [2019-11-06 22:36:49,823 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 22:36:49,824 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:36:49,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 22:36:49,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:36:49,826 INFO L87 Difference]: Start difference. First operand 1814 states and 2426 transitions. Second operand 3 states. [2019-11-06 22:36:50,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:36:50,433 INFO L93 Difference]: Finished difference Result 4644 states and 6253 transitions. [2019-11-06 22:36:50,433 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 22:36:50,434 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 122 [2019-11-06 22:36:50,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:36:50,448 INFO L225 Difference]: With dead ends: 4644 [2019-11-06 22:36:50,448 INFO L226 Difference]: Without dead ends: 1658 [2019-11-06 22:36:50,456 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 246 SyntacticMatches, 3 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:36:50,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1658 states. [2019-11-06 22:36:50,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1658 to 1658. [2019-11-06 22:36:50,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1658 states. [2019-11-06 22:36:50,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1658 states to 1658 states and 2133 transitions. [2019-11-06 22:36:50,552 INFO L78 Accepts]: Start accepts. Automaton has 1658 states and 2133 transitions. Word has length 122 [2019-11-06 22:36:50,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:36:50,553 INFO L462 AbstractCegarLoop]: Abstraction has 1658 states and 2133 transitions. [2019-11-06 22:36:50,553 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 22:36:50,553 INFO L276 IsEmpty]: Start isEmpty. Operand 1658 states and 2133 transitions. [2019-11-06 22:36:50,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2019-11-06 22:36:50,558 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:36:50,559 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2019-11-06 22:36:50,766 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:36:50,766 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:36:50,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:36:50,767 INFO L82 PathProgramCache]: Analyzing trace with hash -2006010265, now seen corresponding path program 1 times [2019-11-06 22:36:50,768 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:36:50,768 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009760140] [2019-11-06 22:36:50,768 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:36:50,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:36:50,885 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 41 proven. 16 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-11-06 22:36:50,886 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009760140] [2019-11-06 22:36:50,886 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [33564793] [2019-11-06 22:36:50,886 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:36:50,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:36:50,990 INFO L256 TraceCheckSpWp]: Trace formula consists of 432 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 22:36:51,011 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:36:51,072 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 52 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-11-06 22:36:51,072 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:36:51,149 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 46 proven. 14 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-06 22:36:51,150 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [1638248507] [2019-11-06 22:36:51,157 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 133 [2019-11-06 22:36:51,219 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-11-06 22:36:51,219 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2)