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/Problem16_label40.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 00:08:56,463 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 00:08:56,465 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 00:08:56,485 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 00:08:56,486 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 00:08:56,487 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 00:08:56,489 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 00:08:56,499 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 00:08:56,503 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 00:08:56,508 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 00:08:56,509 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 00:08:56,511 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 00:08:56,511 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 00:08:56,513 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 00:08:56,516 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 00:08:56,518 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 00:08:56,519 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 00:08:56,520 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 00:08:56,522 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 00:08:56,527 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 00:08:56,532 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 00:08:56,535 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 00:08:56,539 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 00:08:56,539 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 00:08:56,542 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 00:08:56,553 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 00:08:56,554 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 00:08:56,555 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 00:08:56,556 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 00:08:56,585 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 00:08:56,591 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 00:08:56,592 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 00:08:56,593 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 00:08:56,593 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 00:08:56,593 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 00:08:56,596 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 00:08:56,597 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 00:08:56,597 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 00:08:56,597 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 00:08:56,597 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 00:08:56,597 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 00:08:56,597 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 00:08:56,598 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 00:08:56,598 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 00:08:56,598 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 00:08:56,598 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 00:08:56,598 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 00:08:56,598 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 00:08:56,598 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 00:08:56,599 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 00:08:56,599 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 00:08:56,599 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 00:08:56,600 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 00:08:56,600 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 00:08:56,600 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 00:08:56,600 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 00:08:56,600 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 00:08:56,601 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 00:08:56,891 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 00:08:56,910 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 00:08:56,914 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 00:08:56,915 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 00:08:56,916 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 00:08:56,917 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem16_label40.c [2019-10-15 00:08:57,004 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/de7cdd247/eb22296d41924a50bcc862a396649e5b/FLAGb032277a8 [2019-10-15 00:08:57,741 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 00:08:57,743 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem16_label40.c [2019-10-15 00:08:57,770 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/de7cdd247/eb22296d41924a50bcc862a396649e5b/FLAGb032277a8 [2019-10-15 00:08:57,896 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/de7cdd247/eb22296d41924a50bcc862a396649e5b [2019-10-15 00:08:57,907 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 00:08:57,909 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 00:08:57,910 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 00:08:57,910 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 00:08:57,914 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 00:08:57,915 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 12:08:57" (1/1) ... [2019-10-15 00:08:57,918 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@19a21fe4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:08:57, skipping insertion in model container [2019-10-15 00:08:57,918 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 12:08:57" (1/1) ... [2019-10-15 00:08:57,928 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 00:08:58,017 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 00:08:58,948 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 00:08:58,963 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 00:08:59,304 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 00:08:59,327 INFO L192 MainTranslator]: Completed translation [2019-10-15 00:08:59,328 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:08:59 WrapperNode [2019-10-15 00:08:59,328 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 00:08:59,329 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 00:08:59,329 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 00:08:59,329 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 00:08:59,346 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:08:59" (1/1) ... [2019-10-15 00:08:59,346 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:08:59" (1/1) ... [2019-10-15 00:08:59,393 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:08:59" (1/1) ... [2019-10-15 00:08:59,396 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:08:59" (1/1) ... [2019-10-15 00:08:59,466 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:08:59" (1/1) ... [2019-10-15 00:08:59,507 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:08:59" (1/1) ... [2019-10-15 00:08:59,528 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:08:59" (1/1) ... [2019-10-15 00:08:59,543 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 00:08:59,544 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 00:08:59,544 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 00:08:59,544 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 00:08:59,545 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:08:59" (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 00:08:59,611 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 00:08:59,611 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 00:08:59,611 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-15 00:08:59,611 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-10-15 00:08:59,612 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 00:08:59,612 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-15 00:08:59,612 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-10-15 00:08:59,612 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 00:08:59,613 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 00:08:59,613 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-15 00:08:59,613 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 00:08:59,613 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 00:08:59,613 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 00:09:01,998 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 00:09:01,999 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-15 00:09:02,002 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 12:09:02 BoogieIcfgContainer [2019-10-15 00:09:02,003 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 00:09:02,007 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 00:09:02,008 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 00:09:02,011 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 00:09:02,012 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 12:08:57" (1/3) ... [2019-10-15 00:09:02,013 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5439efa2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 12:09:02, skipping insertion in model container [2019-10-15 00:09:02,013 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:08:59" (2/3) ... [2019-10-15 00:09:02,014 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5439efa2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 12:09:02, skipping insertion in model container [2019-10-15 00:09:02,015 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 12:09:02" (3/3) ... [2019-10-15 00:09:02,024 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem16_label40.c [2019-10-15 00:09:02,038 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 00:09:02,052 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 00:09:02,065 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 00:09:02,119 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 00:09:02,120 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 00:09:02,120 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 00:09:02,120 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 00:09:02,120 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 00:09:02,120 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 00:09:02,120 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 00:09:02,121 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 00:09:02,161 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states. [2019-10-15 00:09:02,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2019-10-15 00:09:02,174 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:09:02,176 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 00:09:02,178 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:09:02,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:09:02,184 INFO L82 PathProgramCache]: Analyzing trace with hash -1393249942, now seen corresponding path program 1 times [2019-10-15 00:09:02,194 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:09:02,195 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787809754] [2019-10-15 00:09:02,195 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:09:02,195 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:09:02,195 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:09:02,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:09:02,639 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 00:09:02,640 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787809754] [2019-10-15 00:09:02,641 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:09:02,641 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 00:09:02,642 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549987175] [2019-10-15 00:09:02,648 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 00:09:02,650 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:09:02,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 00:09:02,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 00:09:02,669 INFO L87 Difference]: Start difference. First operand 409 states. Second operand 3 states. [2019-10-15 00:09:05,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:09:05,276 INFO L93 Difference]: Finished difference Result 1153 states and 2141 transitions. [2019-10-15 00:09:05,277 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 00:09:05,279 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 69 [2019-10-15 00:09:05,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:09:05,306 INFO L225 Difference]: With dead ends: 1153 [2019-10-15 00:09:05,306 INFO L226 Difference]: Without dead ends: 682 [2019-10-15 00:09:05,316 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 00:09:05,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 682 states. [2019-10-15 00:09:05,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 682 to 682. [2019-10-15 00:09:05,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 682 states. [2019-10-15 00:09:05,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 682 states to 682 states and 1190 transitions. [2019-10-15 00:09:05,441 INFO L78 Accepts]: Start accepts. Automaton has 682 states and 1190 transitions. Word has length 69 [2019-10-15 00:09:05,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:09:05,442 INFO L462 AbstractCegarLoop]: Abstraction has 682 states and 1190 transitions. [2019-10-15 00:09:05,442 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 00:09:05,442 INFO L276 IsEmpty]: Start isEmpty. Operand 682 states and 1190 transitions. [2019-10-15 00:09:05,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2019-10-15 00:09:05,454 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:09:05,454 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-15 00:09:05,455 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:09:05,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:09:05,457 INFO L82 PathProgramCache]: Analyzing trace with hash 1266997046, now seen corresponding path program 1 times [2019-10-15 00:09:05,457 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:09:05,457 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387116579] [2019-10-15 00:09:05,457 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:09:05,458 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:09:05,458 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:09:05,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:09:05,769 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:09:05,770 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387116579] [2019-10-15 00:09:05,770 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:09:05,770 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-15 00:09:05,770 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117490605] [2019-10-15 00:09:05,772 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-15 00:09:05,772 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:09:05,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-15 00:09:05,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-15 00:09:05,773 INFO L87 Difference]: Start difference. First operand 682 states and 1190 transitions. Second operand 6 states. [2019-10-15 00:09:08,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:09:08,451 INFO L93 Difference]: Finished difference Result 1730 states and 3016 transitions. [2019-10-15 00:09:08,452 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 00:09:08,452 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 161 [2019-10-15 00:09:08,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:09:08,462 INFO L225 Difference]: With dead ends: 1730 [2019-10-15 00:09:08,463 INFO L226 Difference]: Without dead ends: 1054 [2019-10-15 00:09:08,467 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 00:09:08,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1054 states. [2019-10-15 00:09:08,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1054 to 1034. [2019-10-15 00:09:08,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1034 states. [2019-10-15 00:09:08,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1034 states to 1034 states and 1692 transitions. [2019-10-15 00:09:08,536 INFO L78 Accepts]: Start accepts. Automaton has 1034 states and 1692 transitions. Word has length 161 [2019-10-15 00:09:08,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:09:08,539 INFO L462 AbstractCegarLoop]: Abstraction has 1034 states and 1692 transitions. [2019-10-15 00:09:08,539 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-15 00:09:08,539 INFO L276 IsEmpty]: Start isEmpty. Operand 1034 states and 1692 transitions. [2019-10-15 00:09:08,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 272 [2019-10-15 00:09:08,552 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:09:08,552 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 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 00:09:08,553 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:09:08,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:09:08,554 INFO L82 PathProgramCache]: Analyzing trace with hash 7693126, now seen corresponding path program 1 times [2019-10-15 00:09:08,554 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:09:08,555 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143193033] [2019-10-15 00:09:08,556 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:09:08,556 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:09:08,557 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:09:08,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:09:08,925 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 124 proven. 88 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-15 00:09:08,926 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143193033] [2019-10-15 00:09:08,926 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [842759439] [2019-10-15 00:09:08,926 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 00:09:09,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:09:09,103 INFO L256 TraceCheckSpWp]: Trace formula consists of 460 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-15 00:09:09,117 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 00:09:09,313 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 153 proven. 0 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2019-10-15 00:09:09,313 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 00:09:09,591 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 124 proven. 88 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-15 00:09:09,592 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 00:09:09,592 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 11 [2019-10-15 00:09:09,593 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671021656] [2019-10-15 00:09:09,594 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-15 00:09:09,597 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:09:09,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-15 00:09:09,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2019-10-15 00:09:09,599 INFO L87 Difference]: Start difference. First operand 1034 states and 1692 transitions. Second operand 5 states. [2019-10-15 00:09:12,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:09:12,169 INFO L93 Difference]: Finished difference Result 2427 states and 3968 transitions. [2019-10-15 00:09:12,170 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 00:09:12,170 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 271 [2019-10-15 00:09:12,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:09:12,179 INFO L225 Difference]: With dead ends: 2427 [2019-10-15 00:09:12,180 INFO L226 Difference]: Without dead ends: 1399 [2019-10-15 00:09:12,183 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 551 GetRequests, 537 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2019-10-15 00:09:12,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1399 states. [2019-10-15 00:09:12,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1399 to 1388. [2019-10-15 00:09:12,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1388 states. [2019-10-15 00:09:12,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1388 states to 1388 states and 2182 transitions. [2019-10-15 00:09:12,226 INFO L78 Accepts]: Start accepts. Automaton has 1388 states and 2182 transitions. Word has length 271 [2019-10-15 00:09:12,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:09:12,227 INFO L462 AbstractCegarLoop]: Abstraction has 1388 states and 2182 transitions. [2019-10-15 00:09:12,227 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-15 00:09:12,227 INFO L276 IsEmpty]: Start isEmpty. Operand 1388 states and 2182 transitions. [2019-10-15 00:09:12,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 347 [2019-10-15 00:09:12,234 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:09:12,234 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 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 00:09:12,440 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 00:09:12,441 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:09:12,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:09:12,442 INFO L82 PathProgramCache]: Analyzing trace with hash 979494015, now seen corresponding path program 1 times [2019-10-15 00:09:12,443 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:09:12,443 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997378361] [2019-10-15 00:09:12,443 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:09:12,444 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:09:12,444 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:09:12,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:09:12,687 INFO L134 CoverageAnalysis]: Checked inductivity of 428 backedges. 186 proven. 142 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2019-10-15 00:09:12,687 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997378361] [2019-10-15 00:09:12,688 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [182799139] [2019-10-15 00:09:12,688 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 00:09:12,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:09:12,853 INFO L256 TraceCheckSpWp]: Trace formula consists of 577 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-15 00:09:12,862 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 00:09:12,968 INFO L134 CoverageAnalysis]: Checked inductivity of 428 backedges. 210 proven. 0 refuted. 0 times theorem prover too weak. 218 trivial. 0 not checked. [2019-10-15 00:09:12,968 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 00:09:13,216 INFO L134 CoverageAnalysis]: Checked inductivity of 428 backedges. 186 proven. 142 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2019-10-15 00:09:13,216 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 00:09:13,217 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 9 [2019-10-15 00:09:13,217 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746823456] [2019-10-15 00:09:13,218 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-15 00:09:13,218 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:09:13,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-15 00:09:13,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2019-10-15 00:09:13,219 INFO L87 Difference]: Start difference. First operand 1388 states and 2182 transitions. Second operand 5 states. [2019-10-15 00:09:16,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:09:16,923 INFO L93 Difference]: Finished difference Result 4243 states and 6811 transitions. [2019-10-15 00:09:16,928 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-15 00:09:16,929 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 346 [2019-10-15 00:09:16,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:09:16,947 INFO L225 Difference]: With dead ends: 4243 [2019-10-15 00:09:16,947 INFO L226 Difference]: Without dead ends: 2861 [2019-10-15 00:09:16,951 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 701 GetRequests, 690 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2019-10-15 00:09:16,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2861 states. [2019-10-15 00:09:17,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2861 to 2819. [2019-10-15 00:09:17,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2819 states. [2019-10-15 00:09:17,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2819 states to 2819 states and 4287 transitions. [2019-10-15 00:09:17,052 INFO L78 Accepts]: Start accepts. Automaton has 2819 states and 4287 transitions. Word has length 346 [2019-10-15 00:09:17,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:09:17,053 INFO L462 AbstractCegarLoop]: Abstraction has 2819 states and 4287 transitions. [2019-10-15 00:09:17,054 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-15 00:09:17,054 INFO L276 IsEmpty]: Start isEmpty. Operand 2819 states and 4287 transitions. [2019-10-15 00:09:17,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 351 [2019-10-15 00:09:17,062 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:09:17,062 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 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 00:09:17,272 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 00:09:17,272 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:09:17,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:09:17,273 INFO L82 PathProgramCache]: Analyzing trace with hash -1792266937, now seen corresponding path program 1 times [2019-10-15 00:09:17,273 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:09:17,274 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718954696] [2019-10-15 00:09:17,274 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:09:17,275 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:09:17,276 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:09:17,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:09:17,524 INFO L134 CoverageAnalysis]: Checked inductivity of 436 backedges. 186 proven. 150 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2019-10-15 00:09:17,525 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718954696] [2019-10-15 00:09:17,525 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [249082364] [2019-10-15 00:09:17,525 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 00:09:17,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:09:17,660 INFO L256 TraceCheckSpWp]: Trace formula consists of 581 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-15 00:09:17,668 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 00:09:17,874 INFO L134 CoverageAnalysis]: Checked inductivity of 436 backedges. 218 proven. 0 refuted. 0 times theorem prover too weak. 218 trivial. 0 not checked. [2019-10-15 00:09:17,874 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 00:09:18,047 INFO L134 CoverageAnalysis]: Checked inductivity of 436 backedges. 186 proven. 150 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2019-10-15 00:09:18,048 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 00:09:18,048 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 11 [2019-10-15 00:09:18,048 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577341344] [2019-10-15 00:09:18,049 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-15 00:09:18,049 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:09:18,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-15 00:09:18,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2019-10-15 00:09:18,050 INFO L87 Difference]: Start difference. First operand 2819 states and 4287 transitions. Second operand 5 states. [2019-10-15 00:09:21,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:09:21,049 INFO L93 Difference]: Finished difference Result 8487 states and 13372 transitions. [2019-10-15 00:09:21,049 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-15 00:09:21,050 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 350 [2019-10-15 00:09:21,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:09:21,080 INFO L225 Difference]: With dead ends: 8487 [2019-10-15 00:09:21,080 INFO L226 Difference]: Without dead ends: 5674 [2019-10-15 00:09:21,088 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 709 GetRequests, 695 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2019-10-15 00:09:21,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5674 states. [2019-10-15 00:09:21,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5674 to 5640. [2019-10-15 00:09:21,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5640 states. [2019-10-15 00:09:21,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5640 states to 5640 states and 7785 transitions. [2019-10-15 00:09:21,242 INFO L78 Accepts]: Start accepts. Automaton has 5640 states and 7785 transitions. Word has length 350 [2019-10-15 00:09:21,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:09:21,247 INFO L462 AbstractCegarLoop]: Abstraction has 5640 states and 7785 transitions. [2019-10-15 00:09:21,247 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-15 00:09:21,247 INFO L276 IsEmpty]: Start isEmpty. Operand 5640 states and 7785 transitions. [2019-10-15 00:09:21,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 376 [2019-10-15 00:09:21,260 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:09:21,260 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:09:21,464 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 00:09:21,464 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:09:21,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:09:21,465 INFO L82 PathProgramCache]: Analyzing trace with hash -353311870, now seen corresponding path program 1 times [2019-10-15 00:09:21,465 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:09:21,465 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054754813] [2019-10-15 00:09:21,465 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:09:21,466 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:09:21,466 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:09:21,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:09:22,659 INFO L134 CoverageAnalysis]: Checked inductivity of 215 backedges. 213 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:09:22,659 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054754813] [2019-10-15 00:09:22,659 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1096720094] [2019-10-15 00:09:22,660 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 00:09:22,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:09:22,768 INFO L256 TraceCheckSpWp]: Trace formula consists of 558 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-15 00:09:22,774 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 00:09:23,030 INFO L134 CoverageAnalysis]: Checked inductivity of 215 backedges. 213 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:09:23,030 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 00:09:23,363 INFO L134 CoverageAnalysis]: Checked inductivity of 215 backedges. 213 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:09:23,363 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [1628027212] [2019-10-15 00:09:23,369 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 376 [2019-10-15 00:09:23,431 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-15 00:09:23,431 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-15 00:09:27,697 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation.