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/Problem14_label44.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 20:07:29,435 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 20:07:29,438 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 20:07:29,459 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 20:07:29,460 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 20:07:29,462 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 20:07:29,464 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 20:07:29,477 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 20:07:29,479 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 20:07:29,482 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 20:07:29,484 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 20:07:29,486 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 20:07:29,486 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 20:07:29,489 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 20:07:29,492 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 20:07:29,494 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 20:07:29,495 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 20:07:29,497 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 20:07:29,499 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 20:07:29,504 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 20:07:29,508 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 20:07:29,509 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 20:07:29,511 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 20:07:29,511 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 20:07:29,515 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-13 20:07:29,515 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-13 20:07:29,516 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-13 20:07:29,517 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-13 20:07:29,519 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-13 20:07:29,520 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-13 20:07:29,520 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 20:07:29,522 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 20:07:29,523 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 20:07:29,524 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 20:07:29,526 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 20:07:29,526 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 20:07:29,527 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 20:07:29,527 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 20:07:29,527 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 20:07:29,529 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 20:07:29,532 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 20:07:29,533 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 [2019-10-13 20:07:29,553 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 20:07:29,553 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 20:07:29,554 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 20:07:29,554 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 20:07:29,554 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 20:07:29,555 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 20:07:29,555 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 20:07:29,555 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 20:07:29,555 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 20:07:29,555 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 20:07:29,556 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 20:07:29,556 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 20:07:29,556 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 20:07:29,556 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 20:07:29,556 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 20:07:29,557 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 20:07:29,557 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 20:07:29,557 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 20:07:29,557 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 20:07:29,557 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 20:07:29,558 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 20:07:29,558 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 20:07:29,558 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 20:07:29,558 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 20:07:29,558 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 20:07:29,559 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 20:07:29,559 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 20:07:29,559 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 20:07:29,559 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 [2019-10-13 20:07:29,854 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 20:07:29,868 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 20:07:29,871 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 20:07:29,873 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 20:07:29,873 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 20:07:29,874 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem14_label44.c [2019-10-13 20:07:29,937 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/235173b72/8fc28808bb0f4335ad755d56e4c78b96/FLAG9acc7431a [2019-10-13 20:07:30,560 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 20:07:30,560 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem14_label44.c [2019-10-13 20:07:30,580 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/235173b72/8fc28808bb0f4335ad755d56e4c78b96/FLAG9acc7431a [2019-10-13 20:07:30,801 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/235173b72/8fc28808bb0f4335ad755d56e4c78b96 [2019-10-13 20:07:30,810 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 20:07:30,811 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 20:07:30,812 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 20:07:30,812 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 20:07:30,815 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 20:07:30,817 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 08:07:30" (1/1) ... [2019-10-13 20:07:30,820 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4e53d70d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:07:30, skipping insertion in model container [2019-10-13 20:07:30,820 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 08:07:30" (1/1) ... [2019-10-13 20:07:30,827 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 20:07:30,874 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 20:07:31,464 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 20:07:31,477 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 20:07:31,710 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 20:07:31,735 INFO L192 MainTranslator]: Completed translation [2019-10-13 20:07:31,736 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:07:31 WrapperNode [2019-10-13 20:07:31,736 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 20:07:31,737 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 20:07:31,738 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 20:07:31,738 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 20:07:31,758 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:07:31" (1/1) ... [2019-10-13 20:07:31,758 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:07:31" (1/1) ... [2019-10-13 20:07:31,783 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:07:31" (1/1) ... [2019-10-13 20:07:31,784 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:07:31" (1/1) ... [2019-10-13 20:07:31,835 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:07:31" (1/1) ... [2019-10-13 20:07:31,852 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:07:31" (1/1) ... [2019-10-13 20:07:31,860 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:07:31" (1/1) ... [2019-10-13 20:07:31,872 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 20:07:31,873 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 20:07:31,873 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 20:07:31,873 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 20:07:31,877 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:07:31" (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 [2019-10-13 20:07:31,987 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 20:07:31,987 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 20:07:31,988 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-13 20:07:31,988 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 20:07:31,989 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-13 20:07:31,990 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 20:07:31,990 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 20:07:31,990 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-13 20:07:31,991 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 20:07:31,992 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 20:07:31,992 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 20:07:33,626 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 20:07:33,626 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-13 20:07:33,628 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:07:33 BoogieIcfgContainer [2019-10-13 20:07:33,628 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 20:07:33,629 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 20:07:33,630 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 20:07:33,633 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 20:07:33,633 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 08:07:30" (1/3) ... [2019-10-13 20:07:33,634 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a87541a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 08:07:33, skipping insertion in model container [2019-10-13 20:07:33,635 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:07:31" (2/3) ... [2019-10-13 20:07:33,635 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a87541a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 08:07:33, skipping insertion in model container [2019-10-13 20:07:33,635 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:07:33" (3/3) ... [2019-10-13 20:07:33,638 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem14_label44.c [2019-10-13 20:07:33,649 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 20:07:33,658 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 20:07:33,671 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 20:07:33,702 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 20:07:33,702 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 20:07:33,702 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 20:07:33,703 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 20:07:33,703 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 20:07:33,703 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 20:07:33,703 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 20:07:33,703 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 20:07:33,730 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states. [2019-10-13 20:07:33,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-10-13 20:07:33,738 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:07:33,739 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 20:07:33,741 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:07:33,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:07:33,748 INFO L82 PathProgramCache]: Analyzing trace with hash -989093190, now seen corresponding path program 1 times [2019-10-13 20:07:33,759 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:07:33,759 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026500809] [2019-10-13 20:07:33,760 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:07:33,760 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:07:33,760 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:07:33,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:07:34,034 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:07:34,035 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026500809] [2019-10-13 20:07:34,036 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:07:34,036 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 20:07:34,037 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579395534] [2019-10-13 20:07:34,042 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 20:07:34,044 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:07:34,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 20:07:34,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-13 20:07:34,065 INFO L87 Difference]: Start difference. First operand 254 states. Second operand 4 states. [2019-10-13 20:07:36,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:07:36,222 INFO L93 Difference]: Finished difference Result 890 states and 1606 transitions. [2019-10-13 20:07:36,223 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 20:07:36,224 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2019-10-13 20:07:36,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:07:36,248 INFO L225 Difference]: With dead ends: 890 [2019-10-13 20:07:36,248 INFO L226 Difference]: Without dead ends: 554 [2019-10-13 20:07:36,260 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-13 20:07:36,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 554 states. [2019-10-13 20:07:36,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 554 to 372. [2019-10-13 20:07:36,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 372 states. [2019-10-13 20:07:36,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 372 states to 372 states and 524 transitions. [2019-10-13 20:07:36,340 INFO L78 Accepts]: Start accepts. Automaton has 372 states and 524 transitions. Word has length 17 [2019-10-13 20:07:36,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:07:36,340 INFO L462 AbstractCegarLoop]: Abstraction has 372 states and 524 transitions. [2019-10-13 20:07:36,340 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 20:07:36,340 INFO L276 IsEmpty]: Start isEmpty. Operand 372 states and 524 transitions. [2019-10-13 20:07:36,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2019-10-13 20:07:36,345 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:07:36,345 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-13 20:07:36,346 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:07:36,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:07:36,346 INFO L82 PathProgramCache]: Analyzing trace with hash 649942285, now seen corresponding path program 1 times [2019-10-13 20:07:36,347 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:07:36,347 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531356492] [2019-10-13 20:07:36,347 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:07:36,347 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:07:36,347 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:07:36,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:07:36,503 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:07:36,503 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531356492] [2019-10-13 20:07:36,504 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:07:36,504 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 20:07:36,504 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978962891] [2019-10-13 20:07:36,506 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 20:07:36,506 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:07:36,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 20:07:36,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-13 20:07:36,508 INFO L87 Difference]: Start difference. First operand 372 states and 524 transitions. Second operand 4 states. [2019-10-13 20:07:38,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:07:38,189 INFO L93 Difference]: Finished difference Result 1466 states and 2091 transitions. [2019-10-13 20:07:38,191 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 20:07:38,192 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 100 [2019-10-13 20:07:38,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:07:38,197 INFO L225 Difference]: With dead ends: 1466 [2019-10-13 20:07:38,198 INFO L226 Difference]: Without dead ends: 736 [2019-10-13 20:07:38,200 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-13 20:07:38,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 736 states. [2019-10-13 20:07:38,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 736 to 554. [2019-10-13 20:07:38,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 554 states. [2019-10-13 20:07:38,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 554 states to 554 states and 809 transitions. [2019-10-13 20:07:38,240 INFO L78 Accepts]: Start accepts. Automaton has 554 states and 809 transitions. Word has length 100 [2019-10-13 20:07:38,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:07:38,241 INFO L462 AbstractCegarLoop]: Abstraction has 554 states and 809 transitions. [2019-10-13 20:07:38,241 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 20:07:38,242 INFO L276 IsEmpty]: Start isEmpty. Operand 554 states and 809 transitions. [2019-10-13 20:07:38,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2019-10-13 20:07:38,246 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:07:38,246 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-13 20:07:38,247 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:07:38,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:07:38,247 INFO L82 PathProgramCache]: Analyzing trace with hash 2036174565, now seen corresponding path program 1 times [2019-10-13 20:07:38,248 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:07:38,248 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43322023] [2019-10-13 20:07:38,248 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:07:38,248 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:07:38,248 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:07:38,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:07:38,644 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:07:38,645 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43322023] [2019-10-13 20:07:38,645 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:07:38,645 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-10-13 20:07:38,645 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266842539] [2019-10-13 20:07:38,646 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-13 20:07:38,646 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:07:38,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-13 20:07:38,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-13 20:07:38,647 INFO L87 Difference]: Start difference. First operand 554 states and 809 transitions. Second operand 7 states. [2019-10-13 20:07:40,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:07:40,189 INFO L93 Difference]: Finished difference Result 1328 states and 1948 transitions. [2019-10-13 20:07:40,190 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-13 20:07:40,191 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 112 [2019-10-13 20:07:40,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:07:40,198 INFO L225 Difference]: With dead ends: 1328 [2019-10-13 20:07:40,199 INFO L226 Difference]: Without dead ends: 780 [2019-10-13 20:07:40,201 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2019-10-13 20:07:40,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 780 states. [2019-10-13 20:07:40,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 780 to 750. [2019-10-13 20:07:40,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 750 states. [2019-10-13 20:07:40,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 750 states to 750 states and 1044 transitions. [2019-10-13 20:07:40,250 INFO L78 Accepts]: Start accepts. Automaton has 750 states and 1044 transitions. Word has length 112 [2019-10-13 20:07:40,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:07:40,251 INFO L462 AbstractCegarLoop]: Abstraction has 750 states and 1044 transitions. [2019-10-13 20:07:40,251 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-13 20:07:40,251 INFO L276 IsEmpty]: Start isEmpty. Operand 750 states and 1044 transitions. [2019-10-13 20:07:40,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2019-10-13 20:07:40,261 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:07:40,262 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-13 20:07:40,262 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:07:40,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:07:40,263 INFO L82 PathProgramCache]: Analyzing trace with hash 1918057, now seen corresponding path program 1 times [2019-10-13 20:07:40,263 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:07:40,263 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244616240] [2019-10-13 20:07:40,263 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:07:40,263 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:07:40,264 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:07:40,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:07:40,441 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 20 proven. 66 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-13 20:07:40,442 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244616240] [2019-10-13 20:07:40,442 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1467807526] [2019-10-13 20:07:40,443 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 [2019-10-13 20:07:40,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:07:40,563 INFO L256 TraceCheckSpWp]: Trace formula consists of 363 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-13 20:07:40,575 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 20:07:40,715 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 79 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-10-13 20:07:40,715 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 20:07:40,856 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 20 proven. 66 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-13 20:07:40,857 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 20:07:40,857 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 9 [2019-10-13 20:07:40,857 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168694734] [2019-10-13 20:07:40,860 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 20:07:40,860 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:07:40,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 20:07:40,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2019-10-13 20:07:40,862 INFO L87 Difference]: Start difference. First operand 750 states and 1044 transitions. Second operand 5 states. [2019-10-13 20:07:42,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:07:42,118 INFO L93 Difference]: Finished difference Result 1888 states and 2684 transitions. [2019-10-13 20:07:42,118 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 20:07:42,118 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 182 [2019-10-13 20:07:42,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:07:42,126 INFO L225 Difference]: With dead ends: 1888 [2019-10-13 20:07:42,127 INFO L226 Difference]: Without dead ends: 1144 [2019-10-13 20:07:42,129 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 372 GetRequests, 358 SyntacticMatches, 4 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2019-10-13 20:07:42,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1144 states. [2019-10-13 20:07:42,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1144 to 1124. [2019-10-13 20:07:42,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1124 states. [2019-10-13 20:07:42,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1124 states to 1124 states and 1464 transitions. [2019-10-13 20:07:42,197 INFO L78 Accepts]: Start accepts. Automaton has 1124 states and 1464 transitions. Word has length 182 [2019-10-13 20:07:42,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:07:42,200 INFO L462 AbstractCegarLoop]: Abstraction has 1124 states and 1464 transitions. [2019-10-13 20:07:42,200 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 20:07:42,200 INFO L276 IsEmpty]: Start isEmpty. Operand 1124 states and 1464 transitions. [2019-10-13 20:07:42,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2019-10-13 20:07:42,214 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:07:42,214 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 20:07:42,421 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 20:07:42,422 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:07:42,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:07:42,423 INFO L82 PathProgramCache]: Analyzing trace with hash 1202443494, now seen corresponding path program 1 times [2019-10-13 20:07:42,424 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:07:42,424 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100862019] [2019-10-13 20:07:42,424 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:07:42,425 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:07:42,425 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:07:42,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:07:43,076 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 91 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:07:43,077 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100862019] [2019-10-13 20:07:43,077 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [385383546] [2019-10-13 20:07:43,078 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 [2019-10-13 20:07:43,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:07:43,154 INFO L256 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-13 20:07:43,160 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 20:07:43,217 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 20:07:43,282 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 82 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-10-13 20:07:43,282 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 20:07:43,415 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 20:07:43,416 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 20:07:43,417 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 20:07:43,444 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 20:07:43,526 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 20:07:43,645 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 20 proven. 69 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-13 20:07:43,645 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 20:07:43,646 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [11, 5] total 16 [2019-10-13 20:07:43,646 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256938584] [2019-10-13 20:07:43,646 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 20:07:43,647 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:07:43,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 20:07:43,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2019-10-13 20:07:43,647 INFO L87 Difference]: Start difference. First operand 1124 states and 1464 transitions. Second operand 5 states. [2019-10-13 20:07:45,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:07:45,097 INFO L93 Difference]: Finished difference Result 2636 states and 3392 transitions. [2019-10-13 20:07:45,102 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-13 20:07:45,103 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 185 [2019-10-13 20:07:45,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:07:45,118 INFO L225 Difference]: With dead ends: 2636 [2019-10-13 20:07:45,118 INFO L226 Difference]: Without dead ends: 1518 [2019-10-13 20:07:45,120 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 383 GetRequests, 365 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2019-10-13 20:07:45,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1518 states. [2019-10-13 20:07:45,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1518 to 1314. [2019-10-13 20:07:45,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1314 states. [2019-10-13 20:07:45,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1314 states to 1314 states and 1684 transitions. [2019-10-13 20:07:45,175 INFO L78 Accepts]: Start accepts. Automaton has 1314 states and 1684 transitions. Word has length 185 [2019-10-13 20:07:45,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:07:45,175 INFO L462 AbstractCegarLoop]: Abstraction has 1314 states and 1684 transitions. [2019-10-13 20:07:45,175 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 20:07:45,175 INFO L276 IsEmpty]: Start isEmpty. Operand 1314 states and 1684 transitions. [2019-10-13 20:07:45,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2019-10-13 20:07:45,179 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:07:45,179 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-13 20:07:45,393 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 20:07:45,394 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:07:45,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:07:45,394 INFO L82 PathProgramCache]: Analyzing trace with hash -438667603, now seen corresponding path program 1 times [2019-10-13 20:07:45,395 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:07:45,395 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586865001] [2019-10-13 20:07:45,395 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:07:45,395 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:07:45,396 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:07:45,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:07:46,151 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 102 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:07:46,152 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586865001] [2019-10-13 20:07:46,152 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1109002143] [2019-10-13 20:07:46,152 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 [2019-10-13 20:07:46,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:07:46,289 INFO L256 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 26 conjunts are in the unsatisfiable core [2019-10-13 20:07:46,297 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 20:07:46,354 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 4 terms [2019-10-13 20:07:46,445 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 51 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:07:46,445 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 20:07:46,507 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 4 terms [2019-10-13 20:07:46,874 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 24 proven. 80 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:07:46,874 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [1961836951] [2019-10-13 20:07:46,880 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 197 [2019-10-13 20:07:46,932 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-13 20:07:46,932 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-13 20:07:53,608 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-10-13 20:07:53,611 INFO L272 AbstractInterpreter]: Visited 103 different actions 201 times. Merged at 4 different actions 5 times. Never widened. Performed 431 root evaluator evaluations with a maximum evaluation depth of 13. Performed 431 inverse root evaluator evaluations with a maximum inverse evaluation depth of 13. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2019-10-13 20:07:53,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:07:53,616 INFO L536 sIntCurrentIteration]: Generating AbsInt predicates [2019-10-13 20:07:55,703 INFO L227 lantSequenceWeakener]: Weakened 193 states. On average, predicates are now at 77.24% of their original sizes. [2019-10-13 20:07:55,704 INFO L551 sIntCurrentIteration]: Unifying AI predicates [2019-10-13 20:07:55,773 INFO L553 sIntCurrentIteration]: We unified 195 AI predicates to 195 [2019-10-13 20:07:55,773 INFO L562 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-10-13 20:07:55,774 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2019-10-13 20:07:55,774 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [12, 8, 8] total 29 [2019-10-13 20:07:55,774 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960758131] [2019-10-13 20:07:55,775 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-13 20:07:55,776 INFO L137 tionRefinementEngine]: Using predicate unifier AbsIntPredicateUnifier provided by strategy TAIPAN [2019-10-13 20:07:55,776 INFO L124 tionRefinementEngine]: Using hoare triple checker CachingHoareTripleCheckerMap provided by strategy [2019-10-13 20:07:55,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-13 20:07:55,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2019-10-13 20:07:55,776 INFO L87 Difference]: Start difference. First operand 1314 states and 1684 transitions. Second operand 11 states.