/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/Problem10_label48.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 22:44:04,468 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 22:44:04,471 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 22:44:04,488 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-06 22:44:04,507 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 22:44:04,510 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 22:44:04,512 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 22:44:04,514 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 22:44:04,516 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 22:44:04,518 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 22:44:04,522 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 22:44:04,524 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 22:44:04,527 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 22:44:04,529 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 22:44:04,532 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 22:44:04,533 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 22:44:04,536 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 22:44:04,550 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 22:44:04,550 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 22:44:04,551 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 22:44:04,552 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 22:44:04,572 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 22:44:04,572 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 22:44:04,575 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 22:44:04,576 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 22:44:04,576 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 22:44:04,576 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 22:44:04,576 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 22:44:04,577 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 22:44:04,577 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 22:44:04,577 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 22:44:04,578 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 22:44:04,578 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 22:44:04,578 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 22:44:04,579 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 22:44:04,579 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 22:44:04,579 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 22:44:04,579 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 22:44:04,580 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 22:44:04,580 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 22:44:04,580 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 22:44:04,580 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 22:44:04,580 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 22:44:04,581 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 22:44:04,581 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 22:44:04,581 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 22:44:04,581 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 22:44:04,581 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 22:44:04,582 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 22:44:04,582 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 22:44:04,840 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 22:44:04,854 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 22:44:04,860 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 22:44:04,861 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 22:44:04,862 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 22:44:04,863 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem10_label48.c [2019-11-06 22:44:04,929 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b7922a42b/153fa8b331f84489a6b8bc3c4f0b720f/FLAGd621a2c7e [2019-11-06 22:44:05,489 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 22:44:05,490 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem10_label48.c [2019-11-06 22:44:05,503 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b7922a42b/153fa8b331f84489a6b8bc3c4f0b720f/FLAGd621a2c7e [2019-11-06 22:44:05,807 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b7922a42b/153fa8b331f84489a6b8bc3c4f0b720f [2019-11-06 22:44:05,817 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 22:44:05,818 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 22:44:05,819 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 22:44:05,820 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 22:44:05,823 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 22:44:05,824 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:44:05" (1/1) ... [2019-11-06 22:44:05,826 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@544ba177 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:44:05, skipping insertion in model container [2019-11-06 22:44:05,827 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:44:05" (1/1) ... [2019-11-06 22:44:05,834 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 22:44:05,880 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 22:44:06,374 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:44:06,379 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 22:44:06,519 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:44:06,534 INFO L192 MainTranslator]: Completed translation [2019-11-06 22:44:06,535 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:44:06 WrapperNode [2019-11-06 22:44:06,535 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 22:44:06,536 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 22:44:06,536 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 22:44:06,536 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 22:44:06,550 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:44:06" (1/1) ... [2019-11-06 22:44:06,550 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:44:06" (1/1) ... [2019-11-06 22:44:06,580 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:44:06" (1/1) ... [2019-11-06 22:44:06,581 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:44:06" (1/1) ... [2019-11-06 22:44:06,631 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:44:06" (1/1) ... [2019-11-06 22:44:06,645 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:44:06" (1/1) ... [2019-11-06 22:44:06,662 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:44:06" (1/1) ... [2019-11-06 22:44:06,674 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 22:44:06,675 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 22:44:06,675 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 22:44:06,675 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 22:44:06,676 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:44:06" (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 22:44:06,754 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 22:44:06,754 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 22:44:06,754 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-06 22:44:06,754 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 22:44:06,754 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-06 22:44:06,755 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 22:44:06,755 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 22:44:06,756 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-06 22:44:06,756 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 22:44:06,756 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 22:44:06,757 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 22:44:08,009 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 22:44:08,009 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-06 22:44:08,011 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:44:08 BoogieIcfgContainer [2019-11-06 22:44:08,011 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 22:44:08,012 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 22:44:08,012 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 22:44:08,015 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 22:44:08,015 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:44:05" (1/3) ... [2019-11-06 22:44:08,016 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68d7f4bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:44:08, skipping insertion in model container [2019-11-06 22:44:08,016 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:44:06" (2/3) ... [2019-11-06 22:44:08,017 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68d7f4bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:44:08, skipping insertion in model container [2019-11-06 22:44:08,017 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:44:08" (3/3) ... [2019-11-06 22:44:08,022 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem10_label48.c [2019-11-06 22:44:08,031 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 22:44:08,041 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 22:44:08,051 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 22:44:08,077 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 22:44:08,077 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 22:44:08,078 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 22:44:08,078 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 22:44:08,078 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 22:44:08,078 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 22:44:08,079 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 22:44:08,079 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 22:44:08,102 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states. [2019-11-06 22:44:08,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-11-06 22:44:08,108 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:44:08,109 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:44:08,111 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:44:08,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:44:08,117 INFO L82 PathProgramCache]: Analyzing trace with hash 54045006, now seen corresponding path program 1 times [2019-11-06 22:44:08,126 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:44:08,127 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136077243] [2019-11-06 22:44:08,127 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:44:08,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:44:08,327 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 22:44:08,328 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136077243] [2019-11-06 22:44:08,329 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:44:08,329 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-06 22:44:08,331 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808298014] [2019-11-06 22:44:08,337 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 22:44:08,338 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:44:08,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 22:44:08,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 22:44:08,355 INFO L87 Difference]: Start difference. First operand 215 states. Second operand 3 states. [2019-11-06 22:44:09,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:44:09,339 INFO L93 Difference]: Finished difference Result 571 states and 989 transitions. [2019-11-06 22:44:09,341 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 22:44:09,343 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2019-11-06 22:44:09,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:44:09,369 INFO L225 Difference]: With dead ends: 571 [2019-11-06 22:44:09,370 INFO L226 Difference]: Without dead ends: 294 [2019-11-06 22:44:09,382 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 22:44:09,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2019-11-06 22:44:09,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 294. [2019-11-06 22:44:09,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 294 states. [2019-11-06 22:44:09,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 446 transitions. [2019-11-06 22:44:09,479 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 446 transitions. Word has length 13 [2019-11-06 22:44:09,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:44:09,480 INFO L462 AbstractCegarLoop]: Abstraction has 294 states and 446 transitions. [2019-11-06 22:44:09,480 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 22:44:09,480 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 446 transitions. [2019-11-06 22:44:09,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2019-11-06 22:44:09,483 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:44:09,484 INFO L410 BasicCegarLoop]: trace histogram [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] [2019-11-06 22:44:09,484 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:44:09,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:44:09,485 INFO L82 PathProgramCache]: Analyzing trace with hash 58156773, now seen corresponding path program 1 times [2019-11-06 22:44:09,485 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:44:09,485 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107760278] [2019-11-06 22:44:09,485 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:44:09,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:44:09,744 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:44:09,744 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107760278] [2019-11-06 22:44:09,744 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:44:09,745 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-06 22:44:09,745 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190111094] [2019-11-06 22:44:09,747 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 22:44:09,747 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:44:09,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 22:44:09,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:44:09,748 INFO L87 Difference]: Start difference. First operand 294 states and 446 transitions. Second operand 6 states. [2019-11-06 22:44:10,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:44:10,617 INFO L93 Difference]: Finished difference Result 741 states and 1136 transitions. [2019-11-06 22:44:10,617 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 22:44:10,617 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 86 [2019-11-06 22:44:10,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:44:10,622 INFO L225 Difference]: With dead ends: 741 [2019-11-06 22:44:10,623 INFO L226 Difference]: Without dead ends: 453 [2019-11-06 22:44:10,625 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-11-06 22:44:10,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453 states. [2019-11-06 22:44:10,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453 to 445. [2019-11-06 22:44:10,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 445 states. [2019-11-06 22:44:10,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 445 states to 445 states and 626 transitions. [2019-11-06 22:44:10,654 INFO L78 Accepts]: Start accepts. Automaton has 445 states and 626 transitions. Word has length 86 [2019-11-06 22:44:10,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:44:10,655 INFO L462 AbstractCegarLoop]: Abstraction has 445 states and 626 transitions. [2019-11-06 22:44:10,655 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 22:44:10,656 INFO L276 IsEmpty]: Start isEmpty. Operand 445 states and 626 transitions. [2019-11-06 22:44:10,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2019-11-06 22:44:10,659 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:44:10,659 INFO L410 BasicCegarLoop]: trace histogram [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] [2019-11-06 22:44:10,659 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:44:10,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:44:10,660 INFO L82 PathProgramCache]: Analyzing trace with hash -1907689263, now seen corresponding path program 1 times [2019-11-06 22:44:10,660 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:44:10,660 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690688415] [2019-11-06 22:44:10,660 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:44:10,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:44:10,815 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:44:10,816 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690688415] [2019-11-06 22:44:10,816 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:44:10,817 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-06 22:44:10,818 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31321401] [2019-11-06 22:44:10,818 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 22:44:10,819 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:44:10,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 22:44:10,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 22:44:10,820 INFO L87 Difference]: Start difference. First operand 445 states and 626 transitions. Second operand 3 states. [2019-11-06 22:44:11,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:44:11,460 INFO L93 Difference]: Finished difference Result 1319 states and 1891 transitions. [2019-11-06 22:44:11,461 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 22:44:11,461 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 92 [2019-11-06 22:44:11,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:44:11,466 INFO L225 Difference]: With dead ends: 1319 [2019-11-06 22:44:11,466 INFO L226 Difference]: Without dead ends: 880 [2019-11-06 22:44:11,468 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 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 22:44:11,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 880 states. [2019-11-06 22:44:11,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 880 to 880. [2019-11-06 22:44:11,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 880 states. [2019-11-06 22:44:11,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 880 states to 880 states and 1152 transitions. [2019-11-06 22:44:11,506 INFO L78 Accepts]: Start accepts. Automaton has 880 states and 1152 transitions. Word has length 92 [2019-11-06 22:44:11,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:44:11,507 INFO L462 AbstractCegarLoop]: Abstraction has 880 states and 1152 transitions. [2019-11-06 22:44:11,507 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 22:44:11,507 INFO L276 IsEmpty]: Start isEmpty. Operand 880 states and 1152 transitions. [2019-11-06 22:44:11,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2019-11-06 22:44:11,511 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:44:11,512 INFO L410 BasicCegarLoop]: trace histogram [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] [2019-11-06 22:44:11,512 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:44:11,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:44:11,512 INFO L82 PathProgramCache]: Analyzing trace with hash -1492328462, now seen corresponding path program 1 times [2019-11-06 22:44:11,513 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:44:11,513 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653376601] [2019-11-06 22:44:11,513 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:44:11,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:44:11,635 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:44:11,635 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653376601] [2019-11-06 22:44:11,636 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:44:11,636 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-06 22:44:11,636 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413408343] [2019-11-06 22:44:11,637 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 22:44:11,637 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:44:11,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 22:44:11,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:44:11,638 INFO L87 Difference]: Start difference. First operand 880 states and 1152 transitions. Second operand 6 states. [2019-11-06 22:44:12,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:44:12,511 INFO L93 Difference]: Finished difference Result 2078 states and 2807 transitions. [2019-11-06 22:44:12,512 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 22:44:12,512 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 103 [2019-11-06 22:44:12,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:44:12,522 INFO L225 Difference]: With dead ends: 2078 [2019-11-06 22:44:12,523 INFO L226 Difference]: Without dead ends: 1204 [2019-11-06 22:44:12,525 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 22:44:12,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1204 states. [2019-11-06 22:44:12,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1204 to 1192. [2019-11-06 22:44:12,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1192 states. [2019-11-06 22:44:12,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1192 states to 1192 states and 1576 transitions. [2019-11-06 22:44:12,574 INFO L78 Accepts]: Start accepts. Automaton has 1192 states and 1576 transitions. Word has length 103 [2019-11-06 22:44:12,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:44:12,575 INFO L462 AbstractCegarLoop]: Abstraction has 1192 states and 1576 transitions. [2019-11-06 22:44:12,576 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 22:44:12,576 INFO L276 IsEmpty]: Start isEmpty. Operand 1192 states and 1576 transitions. [2019-11-06 22:44:12,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2019-11-06 22:44:12,579 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:44:12,579 INFO L410 BasicCegarLoop]: trace histogram [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 22:44:12,580 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:44:12,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:44:12,580 INFO L82 PathProgramCache]: Analyzing trace with hash -28083010, now seen corresponding path program 1 times [2019-11-06 22:44:12,580 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:44:12,581 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522249387] [2019-11-06 22:44:12,581 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:44:12,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:44:12,758 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:44:12,759 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522249387] [2019-11-06 22:44:12,759 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:44:12,759 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-06 22:44:12,759 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402439298] [2019-11-06 22:44:12,760 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 22:44:12,760 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:44:12,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 22:44:12,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:44:12,761 INFO L87 Difference]: Start difference. First operand 1192 states and 1576 transitions. Second operand 6 states. [2019-11-06 22:44:13,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:44:13,575 INFO L93 Difference]: Finished difference Result 2688 states and 3628 transitions. [2019-11-06 22:44:13,575 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 22:44:13,576 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 125 [2019-11-06 22:44:13,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:44:13,584 INFO L225 Difference]: With dead ends: 2688 [2019-11-06 22:44:13,584 INFO L226 Difference]: Without dead ends: 1502 [2019-11-06 22:44:13,587 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 22:44:13,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1502 states. [2019-11-06 22:44:13,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1502 to 1339. [2019-11-06 22:44:13,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1339 states. [2019-11-06 22:44:13,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1339 states to 1339 states and 1748 transitions. [2019-11-06 22:44:13,637 INFO L78 Accepts]: Start accepts. Automaton has 1339 states and 1748 transitions. Word has length 125 [2019-11-06 22:44:13,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:44:13,638 INFO L462 AbstractCegarLoop]: Abstraction has 1339 states and 1748 transitions. [2019-11-06 22:44:13,638 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 22:44:13,638 INFO L276 IsEmpty]: Start isEmpty. Operand 1339 states and 1748 transitions. [2019-11-06 22:44:13,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2019-11-06 22:44:13,641 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:44:13,642 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:44:13,642 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:44:13,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:44:13,642 INFO L82 PathProgramCache]: Analyzing trace with hash -1911741586, now seen corresponding path program 1 times [2019-11-06 22:44:13,643 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:44:13,643 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499949946] [2019-11-06 22:44:13,643 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:44:13,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:44:13,826 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:44:13,826 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499949946] [2019-11-06 22:44:13,826 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:44:13,827 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-06 22:44:13,827 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74245703] [2019-11-06 22:44:13,827 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 22:44:13,828 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:44:13,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 22:44:13,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:44:13,828 INFO L87 Difference]: Start difference. First operand 1339 states and 1748 transitions. Second operand 6 states. [2019-11-06 22:44:14,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:44:14,875 INFO L93 Difference]: Finished difference Result 2692 states and 3545 transitions. [2019-11-06 22:44:14,876 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 22:44:14,876 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 149 [2019-11-06 22:44:14,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:44:14,888 INFO L225 Difference]: With dead ends: 2692 [2019-11-06 22:44:14,888 INFO L226 Difference]: Without dead ends: 1359 [2019-11-06 22:44:14,893 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-11-06 22:44:14,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1359 states. [2019-11-06 22:44:14,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1359 to 1204. [2019-11-06 22:44:14,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1204 states. [2019-11-06 22:44:14,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1204 states to 1204 states and 1482 transitions. [2019-11-06 22:44:14,935 INFO L78 Accepts]: Start accepts. Automaton has 1204 states and 1482 transitions. Word has length 149 [2019-11-06 22:44:14,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:44:14,935 INFO L462 AbstractCegarLoop]: Abstraction has 1204 states and 1482 transitions. [2019-11-06 22:44:14,935 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 22:44:14,936 INFO L276 IsEmpty]: Start isEmpty. Operand 1204 states and 1482 transitions. [2019-11-06 22:44:14,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2019-11-06 22:44:14,942 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:44:14,942 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:44:14,942 INFO L410 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:44:14,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:44:14,943 INFO L82 PathProgramCache]: Analyzing trace with hash -782626831, now seen corresponding path program 1 times [2019-11-06 22:44:14,943 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:44:14,947 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416276859] [2019-11-06 22:44:14,948 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:44:14,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:44:15,238 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 13 proven. 5 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2019-11-06 22:44:15,239 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416276859] [2019-11-06 22:44:15,239 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1008409357] [2019-11-06 22:44:15,239 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 22:44:15,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:44:15,356 INFO L256 TraceCheckSpWp]: Trace formula consists of 406 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 22:44:15,369 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:44:15,521 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 89 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:44:15,521 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:44:15,731 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 89 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:44:15,732 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [864746246] [2019-11-06 22:44:15,737 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 229 [2019-11-06 22:44:15,787 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-11-06 22:44:15,787 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-11-06 22:44:27,609 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation.