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/Problem11_label49.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 00:04:01,824 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 00:04:01,826 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 00:04:01,839 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-10-15 00:04:01,849 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 00:04:01,850 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 00:04:01,851 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 00:04:01,852 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 00:04:01,853 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 00:04:01,854 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 00:04:01,855 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 00:04:01,857 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 00:04:01,858 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 00:04:01,859 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 00:04:01,861 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 00:04:01,861 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 00:04:01,863 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 00:04:01,871 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 00:04:01,871 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 00:04:01,872 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 00:04:01,873 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 00:04:01,892 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 00:04:01,893 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 00:04:01,894 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 00:04:01,894 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 00:04:01,895 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 00:04:01,895 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 00:04:01,895 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 00:04:01,895 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 00:04:01,896 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 00:04:01,896 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 00:04:01,897 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 00:04:01,897 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 00:04:01,897 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 00:04:01,898 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 00:04:01,898 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 00:04:01,898 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 00:04:01,898 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 00:04:01,899 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 00:04:01,899 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 00:04:01,899 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 00:04:01,899 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 00:04:01,900 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 00:04:01,900 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 00:04:01,900 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 00:04:01,900 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 00:04:01,900 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 00:04:01,901 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 00:04:01,901 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 00:04:01,901 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 00:04:02,205 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 00:04:02,218 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 00:04:02,222 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 00:04:02,223 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 00:04:02,224 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 00:04:02,224 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem11_label49.c [2019-10-15 00:04:02,297 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/83ed23174/5597dbd8d3eb409e9ad6dbc882da6f24/FLAGa9aba3e2f [2019-10-15 00:04:02,907 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 00:04:02,908 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem11_label49.c [2019-10-15 00:04:02,920 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/83ed23174/5597dbd8d3eb409e9ad6dbc882da6f24/FLAGa9aba3e2f [2019-10-15 00:04:03,185 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/83ed23174/5597dbd8d3eb409e9ad6dbc882da6f24 [2019-10-15 00:04:03,195 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 00:04:03,197 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 00:04:03,198 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 00:04:03,198 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 00:04:03,203 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 00:04:03,204 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 12:04:03" (1/1) ... [2019-10-15 00:04:03,206 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@11574e77 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:04:03, skipping insertion in model container [2019-10-15 00:04:03,207 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 12:04:03" (1/1) ... [2019-10-15 00:04:03,215 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 00:04:03,283 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 00:04:04,172 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 00:04:04,178 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 00:04:04,354 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 00:04:04,374 INFO L192 MainTranslator]: Completed translation [2019-10-15 00:04:04,374 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:04:04 WrapperNode [2019-10-15 00:04:04,375 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 00:04:04,376 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 00:04:04,376 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 00:04:04,376 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 00:04:04,390 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:04:04" (1/1) ... [2019-10-15 00:04:04,390 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:04:04" (1/1) ... [2019-10-15 00:04:04,436 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:04:04" (1/1) ... [2019-10-15 00:04:04,437 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:04:04" (1/1) ... [2019-10-15 00:04:04,536 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:04:04" (1/1) ... [2019-10-15 00:04:04,558 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:04:04" (1/1) ... [2019-10-15 00:04:04,575 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:04:04" (1/1) ... [2019-10-15 00:04:04,585 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 00:04:04,586 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 00:04:04,586 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 00:04:04,586 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 00:04:04,587 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:04:04" (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 00:04:04,659 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 00:04:04,659 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 00:04:04,660 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-15 00:04:04,660 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 00:04:04,660 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-15 00:04:04,661 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 00:04:04,662 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 00:04:04,662 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-15 00:04:04,662 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 00:04:04,663 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 00:04:04,663 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 00:04:06,498 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 00:04:06,498 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-15 00:04:06,504 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 12:04:06 BoogieIcfgContainer [2019-10-15 00:04:06,504 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 00:04:06,506 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 00:04:06,506 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 00:04:06,512 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 00:04:06,512 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 12:04:03" (1/3) ... [2019-10-15 00:04:06,513 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2388e0c2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 12:04:06, skipping insertion in model container [2019-10-15 00:04:06,514 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:04:04" (2/3) ... [2019-10-15 00:04:06,515 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2388e0c2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 12:04:06, skipping insertion in model container [2019-10-15 00:04:06,515 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 12:04:06" (3/3) ... [2019-10-15 00:04:06,520 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem11_label49.c [2019-10-15 00:04:06,534 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 00:04:06,544 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 00:04:06,557 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 00:04:06,600 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 00:04:06,600 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 00:04:06,600 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 00:04:06,601 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 00:04:06,601 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 00:04:06,601 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 00:04:06,601 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 00:04:06,601 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 00:04:06,636 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states. [2019-10-15 00:04:06,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-10-15 00:04:06,643 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:04:06,644 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] [2019-10-15 00:04:06,647 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:04:06,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:04:06,653 INFO L82 PathProgramCache]: Analyzing trace with hash 757493474, now seen corresponding path program 1 times [2019-10-15 00:04:06,662 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:04:06,663 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962826495] [2019-10-15 00:04:06,663 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:04:06,664 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:04:06,664 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:04:06,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:04:07,029 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 00:04:07,029 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962826495] [2019-10-15 00:04:07,030 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:04:07,031 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-15 00:04:07,031 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437878609] [2019-10-15 00:04:07,036 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 00:04:07,037 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:04:07,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 00:04:07,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-15 00:04:07,054 INFO L87 Difference]: Start difference. First operand 292 states. Second operand 4 states. [2019-10-15 00:04:09,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:04:09,281 INFO L93 Difference]: Finished difference Result 975 states and 1750 transitions. [2019-10-15 00:04:09,283 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 00:04:09,284 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 25 [2019-10-15 00:04:09,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:04:09,305 INFO L225 Difference]: With dead ends: 975 [2019-10-15 00:04:09,305 INFO L226 Difference]: Without dead ends: 616 [2019-10-15 00:04:09,314 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-15 00:04:09,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 616 states. [2019-10-15 00:04:09,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 616 to 422. [2019-10-15 00:04:09,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 422 states. [2019-10-15 00:04:09,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 422 states to 422 states and 607 transitions. [2019-10-15 00:04:09,413 INFO L78 Accepts]: Start accepts. Automaton has 422 states and 607 transitions. Word has length 25 [2019-10-15 00:04:09,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:04:09,414 INFO L462 AbstractCegarLoop]: Abstraction has 422 states and 607 transitions. [2019-10-15 00:04:09,414 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 00:04:09,414 INFO L276 IsEmpty]: Start isEmpty. Operand 422 states and 607 transitions. [2019-10-15 00:04:09,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2019-10-15 00:04:09,418 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:04:09,418 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-15 00:04:09,419 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:04:09,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:04:09,419 INFO L82 PathProgramCache]: Analyzing trace with hash 673230146, now seen corresponding path program 1 times [2019-10-15 00:04:09,419 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:04:09,420 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334736283] [2019-10-15 00:04:09,420 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:04:09,420 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:04:09,420 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:04:09,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:04:09,687 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:04:09,687 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334736283] [2019-10-15 00:04:09,688 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:04:09,688 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-15 00:04:09,688 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035791178] [2019-10-15 00:04:09,690 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-15 00:04:09,690 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:04:09,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-15 00:04:09,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-15 00:04:09,691 INFO L87 Difference]: Start difference. First operand 422 states and 607 transitions. Second operand 6 states. [2019-10-15 00:04:11,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:04:11,238 INFO L93 Difference]: Finished difference Result 1241 states and 1811 transitions. [2019-10-15 00:04:11,239 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 00:04:11,239 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 97 [2019-10-15 00:04:11,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:04:11,245 INFO L225 Difference]: With dead ends: 1241 [2019-10-15 00:04:11,246 INFO L226 Difference]: Without dead ends: 825 [2019-10-15 00:04:11,248 INFO L600 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 [2019-10-15 00:04:11,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 825 states. [2019-10-15 00:04:11,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 825 to 814. [2019-10-15 00:04:11,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 814 states. [2019-10-15 00:04:11,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 814 states to 814 states and 1163 transitions. [2019-10-15 00:04:11,294 INFO L78 Accepts]: Start accepts. Automaton has 814 states and 1163 transitions. Word has length 97 [2019-10-15 00:04:11,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:04:11,294 INFO L462 AbstractCegarLoop]: Abstraction has 814 states and 1163 transitions. [2019-10-15 00:04:11,294 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-15 00:04:11,295 INFO L276 IsEmpty]: Start isEmpty. Operand 814 states and 1163 transitions. [2019-10-15 00:04:11,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2019-10-15 00:04:11,297 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:04:11,297 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-15 00:04:11,297 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:04:11,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:04:11,298 INFO L82 PathProgramCache]: Analyzing trace with hash -1465736335, now seen corresponding path program 1 times [2019-10-15 00:04:11,298 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:04:11,298 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942774771] [2019-10-15 00:04:11,299 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:04:11,299 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:04:11,299 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:04:11,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:04:11,481 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:04:11,482 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942774771] [2019-10-15 00:04:11,482 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [873329254] [2019-10-15 00:04:11,483 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 00:04:11,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:04:11,569 INFO L256 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-15 00:04:11,579 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 00:04:11,654 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-10-15 00:04:11,689 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:04:11,689 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 00:04:11,874 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 00:04:11,877 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 00:04:11,878 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 00:04:11,883 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 00:04:11,883 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-10-15 00:04:11,887 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 00:04:11,889 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 00:04:11,890 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-10-15 00:04:11,899 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 00:04:11,979 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 00:04:12,050 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:04:12,051 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-15 00:04:12,051 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [7] total 12 [2019-10-15 00:04:12,051 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82066671] [2019-10-15 00:04:12,052 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-15 00:04:12,052 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:04:12,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-15 00:04:12,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2019-10-15 00:04:12,053 INFO L87 Difference]: Start difference. First operand 814 states and 1163 transitions. Second operand 7 states. [2019-10-15 00:04:14,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:04:14,502 INFO L93 Difference]: Finished difference Result 2829 states and 4164 transitions. [2019-10-15 00:04:14,504 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-15 00:04:14,504 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 98 [2019-10-15 00:04:14,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:04:14,528 INFO L225 Difference]: With dead ends: 2829 [2019-10-15 00:04:14,529 INFO L226 Difference]: Without dead ends: 2021 [2019-10-15 00:04:14,531 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 193 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2019-10-15 00:04:14,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2021 states. [2019-10-15 00:04:14,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2021 to 1992. [2019-10-15 00:04:14,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1992 states. [2019-10-15 00:04:14,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1992 states to 1992 states and 2629 transitions. [2019-10-15 00:04:14,643 INFO L78 Accepts]: Start accepts. Automaton has 1992 states and 2629 transitions. Word has length 98 [2019-10-15 00:04:14,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:04:14,643 INFO L462 AbstractCegarLoop]: Abstraction has 1992 states and 2629 transitions. [2019-10-15 00:04:14,643 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-15 00:04:14,644 INFO L276 IsEmpty]: Start isEmpty. Operand 1992 states and 2629 transitions. [2019-10-15 00:04:14,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2019-10-15 00:04:14,654 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:04:14,654 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 00:04:14,862 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 00:04:14,862 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:04:14,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:04:14,863 INFO L82 PathProgramCache]: Analyzing trace with hash -1390346086, now seen corresponding path program 1 times [2019-10-15 00:04:14,863 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:04:14,863 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133846780] [2019-10-15 00:04:14,863 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:04:14,863 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:04:14,864 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:04:14,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:04:15,135 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 13 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:04:15,136 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133846780] [2019-10-15 00:04:15,136 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1134467689] [2019-10-15 00:04:15,136 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 00:04:15,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:04:15,240 INFO L256 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-15 00:04:15,258 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 00:04:15,297 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:04:15,297 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 00:04:15,334 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:04:15,335 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-15 00:04:15,335 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [8] total 10 [2019-10-15 00:04:15,335 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726497928] [2019-10-15 00:04:15,336 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 00:04:15,336 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:04:15,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 00:04:15,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2019-10-15 00:04:15,337 INFO L87 Difference]: Start difference. First operand 1992 states and 2629 transitions. Second operand 4 states. [2019-10-15 00:04:16,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:04:16,894 INFO L93 Difference]: Finished difference Result 5541 states and 7566 transitions. [2019-10-15 00:04:16,894 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 00:04:16,894 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 156 [2019-10-15 00:04:16,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:04:16,914 INFO L225 Difference]: With dead ends: 5541 [2019-10-15 00:04:16,915 INFO L226 Difference]: Without dead ends: 3555 [2019-10-15 00:04:16,921 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 321 GetRequests, 313 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2019-10-15 00:04:16,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3555 states. [2019-10-15 00:04:17,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3555 to 2965. [2019-10-15 00:04:17,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2965 states. [2019-10-15 00:04:17,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2965 states to 2965 states and 3974 transitions. [2019-10-15 00:04:17,016 INFO L78 Accepts]: Start accepts. Automaton has 2965 states and 3974 transitions. Word has length 156 [2019-10-15 00:04:17,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:04:17,017 INFO L462 AbstractCegarLoop]: Abstraction has 2965 states and 3974 transitions. [2019-10-15 00:04:17,017 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 00:04:17,017 INFO L276 IsEmpty]: Start isEmpty. Operand 2965 states and 3974 transitions. [2019-10-15 00:04:17,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2019-10-15 00:04:17,021 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:04:17,021 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1] [2019-10-15 00:04:17,233 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 00:04:17,233 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:04:17,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:04:17,234 INFO L82 PathProgramCache]: Analyzing trace with hash -330242703, now seen corresponding path program 1 times [2019-10-15 00:04:17,234 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:04:17,234 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062839595] [2019-10-15 00:04:17,234 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:04:17,234 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:04:17,235 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:04:17,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:04:17,576 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2019-10-15 00:04:17,577 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062839595] [2019-10-15 00:04:17,577 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [339364489] [2019-10-15 00:04:17,577 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 00:04:17,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:04:17,673 INFO L256 TraceCheckSpWp]: Trace formula consists of 438 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-15 00:04:17,686 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 00:04:17,729 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 00:04:17,729 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 00:04:17,841 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 00:04:18,614 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 40 proven. 2 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2019-10-15 00:04:18,614 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 00:04:18,698 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 00:04:18,699 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 00:04:18,700 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 00:04:18,715 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 00:04:18,765 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 103 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:04:18,766 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [1548231830] [2019-10-15 00:04:18,771 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 226 [2019-10-15 00:04:18,821 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-15 00:04:18,821 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2)