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/Problem12_label18.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 00:04:35,871 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 00:04:35,873 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 00:04:35,893 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-10-15 00:04:35,920 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 00:04:35,922 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 00:04:35,924 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 00:04:35,925 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 00:04:35,927 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 00:04:35,928 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 00:04:35,929 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 00:04:35,934 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 00:04:35,938 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 00:04:35,941 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 00:04:35,944 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 00:04:35,945 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 00:04:35,947 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 00:04:35,957 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 00:04:35,958 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 00:04:35,959 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 00:04:35,960 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 00:04:35,994 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 00:04:35,995 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 00:04:35,997 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 00:04:35,997 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 00:04:35,997 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 00:04:35,997 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 00:04:35,998 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 00:04:35,998 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 00:04:35,998 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 00:04:35,998 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 00:04:35,998 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 00:04:35,998 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 00:04:35,999 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 00:04:35,999 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 00:04:35,999 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 00:04:35,999 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 00:04:35,999 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 00:04:36,000 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 00:04:36,000 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 00:04:36,000 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 00:04:36,000 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 00:04:36,000 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 00:04:36,001 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 00:04:36,001 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 00:04:36,001 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 00:04:36,001 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 00:04:36,001 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 00:04:36,002 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 00:04:36,002 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 00:04:36,311 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 00:04:36,325 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 00:04:36,329 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 00:04:36,330 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 00:04:36,331 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 00:04:36,331 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem12_label18.c [2019-10-15 00:04:36,396 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f3bf11ec1/247fc2401ff34172833f08a9ee27a7fd/FLAG115cb5e8d [2019-10-15 00:04:37,144 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 00:04:37,145 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem12_label18.c [2019-10-15 00:04:37,185 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f3bf11ec1/247fc2401ff34172833f08a9ee27a7fd/FLAG115cb5e8d [2019-10-15 00:04:37,280 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f3bf11ec1/247fc2401ff34172833f08a9ee27a7fd [2019-10-15 00:04:37,292 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 00:04:37,295 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 00:04:37,301 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 00:04:37,301 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 00:04:37,305 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 00:04:37,307 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 12:04:37" (1/1) ... [2019-10-15 00:04:37,311 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@77a1e17 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:04:37, skipping insertion in model container [2019-10-15 00:04:37,311 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 12:04:37" (1/1) ... [2019-10-15 00:04:37,320 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 00:04:37,488 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 00:04:39,195 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 00:04:39,202 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 00:04:39,956 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 00:04:39,986 INFO L192 MainTranslator]: Completed translation [2019-10-15 00:04:39,987 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:04:39 WrapperNode [2019-10-15 00:04:39,987 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 00:04:39,988 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 00:04:39,988 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 00:04:39,989 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 00:04:40,003 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:04:39" (1/1) ... [2019-10-15 00:04:40,004 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:04:39" (1/1) ... [2019-10-15 00:04:40,088 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:04:39" (1/1) ... [2019-10-15 00:04:40,089 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:04:39" (1/1) ... [2019-10-15 00:04:40,219 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:04:39" (1/1) ... [2019-10-15 00:04:40,265 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:04:39" (1/1) ... [2019-10-15 00:04:40,296 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:04:39" (1/1) ... [2019-10-15 00:04:40,327 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 00:04:40,327 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 00:04:40,328 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 00:04:40,328 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 00:04:40,330 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:04:39" (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 00:04:40,413 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 00:04:40,413 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 00:04:40,413 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-15 00:04:40,414 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-10-15 00:04:40,414 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2019-10-15 00:04:40,414 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2019-10-15 00:04:40,414 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 00:04:40,414 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-15 00:04:40,415 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-10-15 00:04:40,417 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2019-10-15 00:04:40,417 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2019-10-15 00:04:40,417 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 00:04:40,418 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 00:04:40,419 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-15 00:04:40,419 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 00:04:40,419 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 00:04:40,420 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 00:04:45,406 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 00:04:45,406 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-15 00:04:45,408 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 12:04:45 BoogieIcfgContainer [2019-10-15 00:04:45,408 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 00:04:45,410 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 00:04:45,410 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 00:04:45,413 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 00:04:45,413 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 12:04:37" (1/3) ... [2019-10-15 00:04:45,414 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@182305b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 12:04:45, skipping insertion in model container [2019-10-15 00:04:45,414 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:04:39" (2/3) ... [2019-10-15 00:04:45,415 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@182305b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 12:04:45, skipping insertion in model container [2019-10-15 00:04:45,415 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 12:04:45" (3/3) ... [2019-10-15 00:04:45,417 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem12_label18.c [2019-10-15 00:04:45,427 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 00:04:45,437 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 00:04:45,450 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 00:04:45,501 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 00:04:45,501 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 00:04:45,501 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 00:04:45,501 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 00:04:45,501 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 00:04:45,501 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 00:04:45,502 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 00:04:45,502 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 00:04:45,672 INFO L276 IsEmpty]: Start isEmpty. Operand 839 states. [2019-10-15 00:04:45,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2019-10-15 00:04:45,686 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:04:45,687 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 00:04:45,689 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:04:45,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:04:45,700 INFO L82 PathProgramCache]: Analyzing trace with hash -1489686398, now seen corresponding path program 1 times [2019-10-15 00:04:45,715 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:04:45,715 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277771327] [2019-10-15 00:04:45,716 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:04:45,716 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:04:45,716 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:04:45,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:04:46,232 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 00:04:46,233 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277771327] [2019-10-15 00:04:46,234 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:04:46,235 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 00:04:46,236 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140155582] [2019-10-15 00:04:46,242 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 00:04:46,244 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:04:46,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 00:04:46,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 00:04:46,265 INFO L87 Difference]: Start difference. First operand 839 states. Second operand 3 states. [2019-10-15 00:04:51,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:04:51,346 INFO L93 Difference]: Finished difference Result 2443 states and 4697 transitions. [2019-10-15 00:04:51,346 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 00:04:51,347 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 59 [2019-10-15 00:04:51,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:04:51,385 INFO L225 Difference]: With dead ends: 2443 [2019-10-15 00:04:51,385 INFO L226 Difference]: Without dead ends: 1542 [2019-10-15 00:04:51,395 INFO L600 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 [2019-10-15 00:04:51,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1542 states. [2019-10-15 00:04:51,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1542 to 1542. [2019-10-15 00:04:51,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1542 states. [2019-10-15 00:04:51,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1542 states to 1542 states and 2822 transitions. [2019-10-15 00:04:51,547 INFO L78 Accepts]: Start accepts. Automaton has 1542 states and 2822 transitions. Word has length 59 [2019-10-15 00:04:51,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:04:51,547 INFO L462 AbstractCegarLoop]: Abstraction has 1542 states and 2822 transitions. [2019-10-15 00:04:51,548 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 00:04:51,548 INFO L276 IsEmpty]: Start isEmpty. Operand 1542 states and 2822 transitions. [2019-10-15 00:04:51,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2019-10-15 00:04:51,566 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:04:51,567 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 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 00:04:51,568 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:04:51,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:04:51,568 INFO L82 PathProgramCache]: Analyzing trace with hash 1403229591, now seen corresponding path program 1 times [2019-10-15 00:04:51,569 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:04:51,569 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652096778] [2019-10-15 00:04:51,571 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:04:51,572 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:04:51,572 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:04:51,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:04:51,790 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:04:51,790 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652096778] [2019-10-15 00:04:51,791 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:04:51,791 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-15 00:04:51,791 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678340096] [2019-10-15 00:04:51,793 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-15 00:04:51,793 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:04:51,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-15 00:04:51,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-15 00:04:51,794 INFO L87 Difference]: Start difference. First operand 1542 states and 2822 transitions. Second operand 5 states. [2019-10-15 00:04:58,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:04:58,451 INFO L93 Difference]: Finished difference Result 3912 states and 7104 transitions. [2019-10-15 00:04:58,452 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 00:04:58,452 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 132 [2019-10-15 00:04:58,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:04:58,467 INFO L225 Difference]: With dead ends: 3912 [2019-10-15 00:04:58,468 INFO L226 Difference]: Without dead ends: 2376 [2019-10-15 00:04:58,472 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-10-15 00:04:58,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2376 states. [2019-10-15 00:04:58,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2376 to 2350. [2019-10-15 00:04:58,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2350 states. [2019-10-15 00:04:58,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2350 states to 2350 states and 3968 transitions. [2019-10-15 00:04:58,541 INFO L78 Accepts]: Start accepts. Automaton has 2350 states and 3968 transitions. Word has length 132 [2019-10-15 00:04:58,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:04:58,542 INFO L462 AbstractCegarLoop]: Abstraction has 2350 states and 3968 transitions. [2019-10-15 00:04:58,542 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-15 00:04:58,542 INFO L276 IsEmpty]: Start isEmpty. Operand 2350 states and 3968 transitions. [2019-10-15 00:04:58,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2019-10-15 00:04:58,544 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:04:58,545 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:04:58,545 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:04:58,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:04:58,546 INFO L82 PathProgramCache]: Analyzing trace with hash -612385541, now seen corresponding path program 1 times [2019-10-15 00:04:58,546 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:04:58,546 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949283440] [2019-10-15 00:04:58,546 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:04:58,547 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:04:58,547 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:04:58,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:04:58,716 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:04:58,717 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949283440] [2019-10-15 00:04:58,717 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:04:58,718 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-15 00:04:58,718 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696785213] [2019-10-15 00:04:58,723 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 00:04:58,724 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:04:58,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 00:04:58,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-15 00:04:58,725 INFO L87 Difference]: Start difference. First operand 2350 states and 3968 transitions. Second operand 4 states. [2019-10-15 00:05:06,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:05:06,706 INFO L93 Difference]: Finished difference Result 9360 states and 16173 transitions. [2019-10-15 00:05:06,706 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 00:05:06,706 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 134 [2019-10-15 00:05:06,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:05:06,742 INFO L225 Difference]: With dead ends: 9360 [2019-10-15 00:05:06,743 INFO L226 Difference]: Without dead ends: 7016 [2019-10-15 00:05:06,750 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 00:05:06,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7016 states. [2019-10-15 00:05:06,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7016 to 7016. [2019-10-15 00:05:06,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7016 states. [2019-10-15 00:05:06,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7016 states to 7016 states and 11462 transitions. [2019-10-15 00:05:06,942 INFO L78 Accepts]: Start accepts. Automaton has 7016 states and 11462 transitions. Word has length 134 [2019-10-15 00:05:06,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:05:06,946 INFO L462 AbstractCegarLoop]: Abstraction has 7016 states and 11462 transitions. [2019-10-15 00:05:06,946 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 00:05:06,946 INFO L276 IsEmpty]: Start isEmpty. Operand 7016 states and 11462 transitions. [2019-10-15 00:05:06,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2019-10-15 00:05:06,950 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:05:06,951 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:05:06,951 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:05:06,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:05:06,951 INFO L82 PathProgramCache]: Analyzing trace with hash -1718729302, now seen corresponding path program 1 times [2019-10-15 00:05:06,952 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:05:06,952 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110911299] [2019-10-15 00:05:06,952 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:05:06,953 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:05:06,953 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:05:07,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:05:07,256 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:05:07,257 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110911299] [2019-10-15 00:05:07,257 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:05:07,257 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-15 00:05:07,257 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505446174] [2019-10-15 00:05:07,259 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-15 00:05:07,259 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:05:07,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-15 00:05:07,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-15 00:05:07,260 INFO L87 Difference]: Start difference. First operand 7016 states and 11462 transitions. Second operand 6 states. [2019-10-15 00:05:13,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:05:13,337 INFO L93 Difference]: Finished difference Result 16490 states and 27176 transitions. [2019-10-15 00:05:13,338 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 00:05:13,338 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 161 [2019-10-15 00:05:13,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:05:13,383 INFO L225 Difference]: With dead ends: 16490 [2019-10-15 00:05:13,383 INFO L226 Difference]: Without dead ends: 9480