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/Problem01_label35.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 23:54:06,552 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 23:54:06,555 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 23:54:06,574 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 23:54:06,574 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 23:54:06,576 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 23:54:06,578 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 23:54:06,590 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 23:54:06,592 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 23:54:06,594 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 23:54:06,595 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 23:54:06,597 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 23:54:06,597 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 23:54:06,600 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 23:54:06,603 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 23:54:06,604 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 23:54:06,605 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 23:54:06,606 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 23:54:06,607 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 23:54:06,609 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 23:54:06,610 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 23:54:06,611 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 23:54:06,612 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 23:54:06,613 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 23:54:06,615 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-14 23:54:06,615 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-14 23:54:06,615 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-14 23:54:06,616 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-14 23:54:06,616 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-14 23:54:06,617 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-14 23:54:06,617 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-14 23:54:06,618 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-14 23:54:06,619 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-14 23:54:06,619 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-14 23:54:06,620 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-14 23:54:06,620 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-14 23:54:06,621 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-14 23:54:06,621 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-14 23:54:06,622 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 23:54:06,622 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 23:54:06,623 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 23:54:06,624 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 [2019-10-14 23:54:06,638 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 23:54:06,638 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 23:54:06,639 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 23:54:06,640 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 23:54:06,640 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 23:54:06,640 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 23:54:06,640 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 23:54:06,641 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 23:54:06,641 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 23:54:06,641 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 23:54:06,641 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 23:54:06,641 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 23:54:06,641 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 23:54:06,642 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 23:54:06,642 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 23:54:06,642 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 23:54:06,642 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 23:54:06,642 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 23:54:06,643 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 23:54:06,643 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 23:54:06,643 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 23:54:06,643 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 23:54:06,643 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 23:54:06,644 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 23:54:06,644 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 23:54:06,644 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 23:54:06,644 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 23:54:06,644 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 23:54:06,645 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 [2019-10-14 23:54:06,917 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 23:54:06,930 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 23:54:06,934 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 23:54:06,935 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 23:54:06,936 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 23:54:06,936 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem01_label35.c [2019-10-14 23:54:06,997 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/61ee22b27/9817a9857a6044848e66630a64d1b806/FLAG4a4820b0b [2019-10-14 23:54:07,546 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 23:54:07,546 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem01_label35.c [2019-10-14 23:54:07,560 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/61ee22b27/9817a9857a6044848e66630a64d1b806/FLAG4a4820b0b [2019-10-14 23:54:07,831 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/61ee22b27/9817a9857a6044848e66630a64d1b806 [2019-10-14 23:54:07,841 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 23:54:07,843 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 23:54:07,844 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 23:54:07,844 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 23:54:07,847 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 23:54:07,848 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:54:07" (1/1) ... [2019-10-14 23:54:07,851 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@52da3fca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:54:07, skipping insertion in model container [2019-10-14 23:54:07,851 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:54:07" (1/1) ... [2019-10-14 23:54:07,858 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 23:54:07,915 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 23:54:08,538 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 23:54:08,548 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 23:54:08,630 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 23:54:08,646 INFO L192 MainTranslator]: Completed translation [2019-10-14 23:54:08,647 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:54:08 WrapperNode [2019-10-14 23:54:08,647 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 23:54:08,648 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 23:54:08,648 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 23:54:08,648 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 23:54:08,662 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:54:08" (1/1) ... [2019-10-14 23:54:08,662 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:54:08" (1/1) ... [2019-10-14 23:54:08,689 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:54:08" (1/1) ... [2019-10-14 23:54:08,689 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:54:08" (1/1) ... [2019-10-14 23:54:08,729 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:54:08" (1/1) ... [2019-10-14 23:54:08,744 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:54:08" (1/1) ... [2019-10-14 23:54:08,749 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:54:08" (1/1) ... [2019-10-14 23:54:08,756 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 23:54:08,756 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 23:54:08,756 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 23:54:08,757 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 23:54:08,757 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:54:08" (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 [2019-10-14 23:54:08,838 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 23:54:08,839 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 23:54:08,839 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-14 23:54:08,839 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 23:54:08,839 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-14 23:54:08,840 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 23:54:08,840 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-14 23:54:08,841 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-14 23:54:08,841 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 23:54:08,841 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 23:54:08,842 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 23:54:09,963 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 23:54:09,963 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-14 23:54:09,965 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:54:09 BoogieIcfgContainer [2019-10-14 23:54:09,965 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 23:54:09,967 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 23:54:09,967 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 23:54:09,972 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 23:54:09,972 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 11:54:07" (1/3) ... [2019-10-14 23:54:09,973 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4fee67c4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:54:09, skipping insertion in model container [2019-10-14 23:54:09,974 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:54:08" (2/3) ... [2019-10-14 23:54:09,975 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4fee67c4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:54:09, skipping insertion in model container [2019-10-14 23:54:09,975 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:54:09" (3/3) ... [2019-10-14 23:54:09,978 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem01_label35.c [2019-10-14 23:54:09,989 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 23:54:09,998 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 23:54:10,007 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 23:54:10,031 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 23:54:10,032 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 23:54:10,032 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 23:54:10,032 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 23:54:10,032 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 23:54:10,033 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 23:54:10,033 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 23:54:10,033 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 23:54:10,056 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states. [2019-10-14 23:54:10,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2019-10-14 23:54:10,066 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:54:10,067 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:54:10,069 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:54:10,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:54:10,075 INFO L82 PathProgramCache]: Analyzing trace with hash 279627110, now seen corresponding path program 1 times [2019-10-14 23:54:10,081 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:54:10,082 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902685648] [2019-10-14 23:54:10,082 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:54:10,082 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:54:10,082 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:54:10,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:54:10,531 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:54:10,532 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902685648] [2019-10-14 23:54:10,533 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:54:10,533 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-14 23:54:10,534 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822719668] [2019-10-14 23:54:10,541 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 23:54:10,544 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-14 23:54:10,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 23:54:10,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 23:54:10,561 INFO L87 Difference]: Start difference. First operand 207 states. Second operand 3 states. [2019-10-14 23:54:11,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:54:11,357 INFO L93 Difference]: Finished difference Result 547 states and 938 transitions. [2019-10-14 23:54:11,358 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 23:54:11,359 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 86 [2019-10-14 23:54:11,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:54:11,384 INFO L225 Difference]: With dead ends: 547 [2019-10-14 23:54:11,384 INFO L226 Difference]: Without dead ends: 278 [2019-10-14 23:54:11,396 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 23:54:11,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2019-10-14 23:54:11,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 278. [2019-10-14 23:54:11,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 278 states. [2019-10-14 23:54:11,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 400 transitions. [2019-10-14 23:54:11,507 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 400 transitions. Word has length 86 [2019-10-14 23:54:11,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:54:11,508 INFO L462 AbstractCegarLoop]: Abstraction has 278 states and 400 transitions. [2019-10-14 23:54:11,509 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 23:54:11,510 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 400 transitions. [2019-10-14 23:54:11,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2019-10-14 23:54:11,522 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:54:11,523 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-14 23:54:11,523 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:54:11,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:54:11,524 INFO L82 PathProgramCache]: Analyzing trace with hash -53773379, now seen corresponding path program 1 times [2019-10-14 23:54:11,525 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:54:11,525 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194288926] [2019-10-14 23:54:11,525 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:54:11,525 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:54:11,526 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:54:11,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:54:11,692 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:54:11,693 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194288926] [2019-10-14 23:54:11,693 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:54:11,693 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-14 23:54:11,693 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840958064] [2019-10-14 23:54:11,695 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-14 23:54:11,696 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-14 23:54:11,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-14 23:54:11,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-14 23:54:11,697 INFO L87 Difference]: Start difference. First operand 278 states and 400 transitions. Second operand 6 states. [2019-10-14 23:54:12,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:54:12,473 INFO L93 Difference]: Finished difference Result 703 states and 1026 transitions. [2019-10-14 23:54:12,479 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 23:54:12,479 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 96 [2019-10-14 23:54:12,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:54:12,491 INFO L225 Difference]: With dead ends: 703 [2019-10-14 23:54:12,491 INFO L226 Difference]: Without dead ends: 431 [2019-10-14 23:54:12,494 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 [2019-10-14 23:54:12,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 431 states. [2019-10-14 23:54:12,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 431 to 419. [2019-10-14 23:54:12,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 419 states. [2019-10-14 23:54:12,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 419 states to 419 states and 588 transitions. [2019-10-14 23:54:12,533 INFO L78 Accepts]: Start accepts. Automaton has 419 states and 588 transitions. Word has length 96 [2019-10-14 23:54:12,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:54:12,534 INFO L462 AbstractCegarLoop]: Abstraction has 419 states and 588 transitions. [2019-10-14 23:54:12,534 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-14 23:54:12,534 INFO L276 IsEmpty]: Start isEmpty. Operand 419 states and 588 transitions. [2019-10-14 23:54:12,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2019-10-14 23:54:12,536 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:54:12,536 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-14 23:54:12,537 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:54:12,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:54:12,537 INFO L82 PathProgramCache]: Analyzing trace with hash -24478849, now seen corresponding path program 1 times [2019-10-14 23:54:12,537 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:54:12,538 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701527814] [2019-10-14 23:54:12,538 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:54:12,538 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:54:12,538 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:54:12,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:54:12,679 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:54:12,680 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701527814] [2019-10-14 23:54:12,681 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:54:12,681 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-14 23:54:12,681 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382840768] [2019-10-14 23:54:12,682 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 23:54:12,683 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-14 23:54:12,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 23:54:12,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 23:54:12,683 INFO L87 Difference]: Start difference. First operand 419 states and 588 transitions. Second operand 3 states. [2019-10-14 23:54:13,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:54:13,264 INFO L93 Difference]: Finished difference Result 1241 states and 1783 transitions. [2019-10-14 23:54:13,265 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 23:54:13,265 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 97 [2019-10-14 23:54:13,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:54:13,272 INFO L225 Difference]: With dead ends: 1241 [2019-10-14 23:54:13,272 INFO L226 Difference]: Without dead ends: 828 [2019-10-14 23:54:13,274 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 23:54:13,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 828 states. [2019-10-14 23:54:13,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 828 to 828. [2019-10-14 23:54:13,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 828 states. [2019-10-14 23:54:13,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 828 states to 828 states and 1098 transitions. [2019-10-14 23:54:13,308 INFO L78 Accepts]: Start accepts. Automaton has 828 states and 1098 transitions. Word has length 97 [2019-10-14 23:54:13,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:54:13,309 INFO L462 AbstractCegarLoop]: Abstraction has 828 states and 1098 transitions. [2019-10-14 23:54:13,309 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 23:54:13,309 INFO L276 IsEmpty]: Start isEmpty. Operand 828 states and 1098 transitions. [2019-10-14 23:54:13,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2019-10-14 23:54:13,312 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:54:13,312 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-14 23:54:13,312 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:54:13,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:54:13,313 INFO L82 PathProgramCache]: Analyzing trace with hash 1420356985, now seen corresponding path program 1 times [2019-10-14 23:54:13,313 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:54:13,313 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163090131] [2019-10-14 23:54:13,313 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:54:13,314 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:54:13,314 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:54:13,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:54:13,441 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:54:13,441 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163090131] [2019-10-14 23:54:13,442 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:54:13,442 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-14 23:54:13,442 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360441790] [2019-10-14 23:54:13,442 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-14 23:54:13,442 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-14 23:54:13,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-14 23:54:13,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-14 23:54:13,443 INFO L87 Difference]: Start difference. First operand 828 states and 1098 transitions. Second operand 6 states. [2019-10-14 23:54:14,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:54:14,245 INFO L93 Difference]: Finished difference Result 1678 states and 2251 transitions. [2019-10-14 23:54:14,245 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-14 23:54:14,246 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 98 [2019-10-14 23:54:14,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:54:14,251 INFO L225 Difference]: With dead ends: 1678 [2019-10-14 23:54:14,251 INFO L226 Difference]: Without dead ends: 856 [2019-10-14 23:54:14,253 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2019-10-14 23:54:14,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 856 states. [2019-10-14 23:54:14,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 856 to 846. [2019-10-14 23:54:14,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 846 states. [2019-10-14 23:54:14,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 846 states to 846 states and 1095 transitions. [2019-10-14 23:54:14,280 INFO L78 Accepts]: Start accepts. Automaton has 846 states and 1095 transitions. Word has length 98 [2019-10-14 23:54:14,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:54:14,281 INFO L462 AbstractCegarLoop]: Abstraction has 846 states and 1095 transitions. [2019-10-14 23:54:14,281 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-14 23:54:14,281 INFO L276 IsEmpty]: Start isEmpty. Operand 846 states and 1095 transitions. [2019-10-14 23:54:14,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2019-10-14 23:54:14,283 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:54:14,283 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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] [2019-10-14 23:54:14,284 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:54:14,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:54:14,284 INFO L82 PathProgramCache]: Analyzing trace with hash 53339990, now seen corresponding path program 1 times [2019-10-14 23:54:14,284 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:54:14,285 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176961934] [2019-10-14 23:54:14,285 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:54:14,285 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:54:14,285 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:54:14,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:54:14,339 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 15 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-14 23:54:14,340 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176961934] [2019-10-14 23:54:14,340 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [440124345] [2019-10-14 23:54:14,340 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 [2019-10-14 23:54:14,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:54:14,435 INFO L256 TraceCheckSpWp]: Trace formula consists of 397 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-14 23:54:14,445 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:54:14,577 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-14 23:54:14,577 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-14 23:54:14,664 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 15 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-14 23:54:14,664 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:54:14,665 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 9 [2019-10-14 23:54:14,665 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190529844] [2019-10-14 23:54:14,665 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 23:54:14,666 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-14 23:54:14,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 23:54:14,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2019-10-14 23:54:14,666 INFO L87 Difference]: Start difference. First operand 846 states and 1095 transitions. Second operand 5 states. [2019-10-14 23:54:15,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:54:15,347 INFO L93 Difference]: Finished difference Result 1710 states and 2261 transitions. [2019-10-14 23:54:15,349 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 23:54:15,349 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 107 [2019-10-14 23:54:15,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:54:15,355 INFO L225 Difference]: With dead ends: 1710 [2019-10-14 23:54:15,355 INFO L226 Difference]: Without dead ends: 870 [2019-10-14 23:54:15,358 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 208 SyntacticMatches, 4 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2019-10-14 23:54:15,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 870 states. [2019-10-14 23:54:15,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 870 to 856. [2019-10-14 23:54:15,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 856 states. [2019-10-14 23:54:15,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 856 states to 856 states and 1044 transitions. [2019-10-14 23:54:15,386 INFO L78 Accepts]: Start accepts. Automaton has 856 states and 1044 transitions. Word has length 107 [2019-10-14 23:54:15,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:54:15,386 INFO L462 AbstractCegarLoop]: Abstraction has 856 states and 1044 transitions. [2019-10-14 23:54:15,386 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 23:54:15,386 INFO L276 IsEmpty]: Start isEmpty. Operand 856 states and 1044 transitions. [2019-10-14 23:54:15,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2019-10-14 23:54:15,388 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:54:15,389 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 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] [2019-10-14 23:54:15,594 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:54:15,597 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:54:15,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:54:15,598 INFO L82 PathProgramCache]: Analyzing trace with hash -579647982, now seen corresponding path program 1 times [2019-10-14 23:54:15,598 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:54:15,598 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300371832] [2019-10-14 23:54:15,599 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:54:15,599 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:54:15,599 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:54:15,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:54:15,726 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 26 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:54:15,727 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300371832] [2019-10-14 23:54:15,727 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1913644828] [2019-10-14 23:54:15,727 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 [2019-10-14 23:54:15,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:54:15,813 INFO L256 TraceCheckSpWp]: Trace formula consists of 395 conjuncts, 13 conjunts are in the unsatisfiable core [2019-10-14 23:54:15,827 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:54:15,891 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 26 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:54:15,892 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-14 23:54:16,117 WARN L191 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 38 [2019-10-14 23:54:16,162 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:54:16,165 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:54:16,166 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:54:16,296 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 26 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:54:16,296 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [570215566] [2019-10-14 23:54:16,303 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 110 [2019-10-14 23:54:16,351 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-14 23:54:16,351 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2)