java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --abstractinterpretationv2.abstract.domain IntervalDomain --traceabstraction.trace.refinement.strategy TAIPAN --traceabstraction.abstract.interpretation.mode USE_PREDICATES -i ../../../trunk/examples/svcomp/eca-rers2012/Problem11_label26.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 00:03:16,706 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 00:03:16,710 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 00:03:16,729 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 00:03:16,730 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 00:03:16,732 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 00:03:16,734 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 00:03:16,744 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 00:03:16,748 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 00:03:16,752 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 00:03:16,753 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 00:03:16,755 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 00:03:16,755 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 00:03:16,757 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 00:03:16,760 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 00:03:16,761 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 00:03:16,763 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 00:03:16,764 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 00:03:16,765 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 00:03:16,769 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 00:03:16,771 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 00:03:16,772 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 00:03:16,773 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 00:03:16,774 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 00:03:16,776 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 00:03:16,779 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-15 00:03:16,780 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-15 00:03:16,780 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-15 00:03:16,781 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-15 00:03:16,782 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-15 00:03:16,782 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-15 00:03:16,783 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-15 00:03:16,783 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-15 00:03:16,783 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 00:03:16,784 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 00:03:16,785 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 00:03:16,786 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-15 00:03:16,800 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 00:03:16,801 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 00:03:16,802 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 00:03:16,802 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 00:03:16,802 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 00:03:16,802 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 00:03:16,803 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 00:03:16,803 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 00:03:16,803 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 00:03:16,803 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 00:03:16,803 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 00:03:16,803 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 00:03:16,804 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 00:03:16,804 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 00:03:16,804 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 00:03:16,804 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 00:03:16,804 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 00:03:16,805 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 00:03:16,805 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 00:03:16,805 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 00:03:16,805 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 00:03:16,805 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 00:03:16,806 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 00:03:16,806 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 00:03:16,806 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 00:03:16,806 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 00:03:16,806 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 00:03:16,807 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 00:03:16,807 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2: Abstract domain -> IntervalDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Abstract interpretation Mode -> USE_PREDICATES [2019-10-15 00:03:17,105 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 00:03:17,118 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 00:03:17,122 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 00:03:17,124 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 00:03:17,124 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 00:03:17,125 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem11_label26.c [2019-10-15 00:03:17,187 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c8a79c722/7aedf3add85e45da931ab1b8b0f1c643/FLAGf0ef61576 [2019-10-15 00:03:17,788 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 00:03:17,789 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem11_label26.c [2019-10-15 00:03:17,803 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c8a79c722/7aedf3add85e45da931ab1b8b0f1c643/FLAGf0ef61576 [2019-10-15 00:03:18,040 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c8a79c722/7aedf3add85e45da931ab1b8b0f1c643 [2019-10-15 00:03:18,051 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 00:03:18,053 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 00:03:18,054 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 00:03:18,054 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 00:03:18,058 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 00:03:18,059 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 12:03:18" (1/1) ... [2019-10-15 00:03:18,062 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@62a266f5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:03:18, skipping insertion in model container [2019-10-15 00:03:18,062 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 12:03:18" (1/1) ... [2019-10-15 00:03:18,070 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 00:03:18,150 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 00:03:19,032 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 00:03:19,039 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 00:03:19,188 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 00:03:19,205 INFO L192 MainTranslator]: Completed translation [2019-10-15 00:03:19,206 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:03:19 WrapperNode [2019-10-15 00:03:19,206 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 00:03:19,207 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 00:03:19,207 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 00:03:19,207 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 00:03:19,222 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:03:19" (1/1) ... [2019-10-15 00:03:19,222 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:03:19" (1/1) ... [2019-10-15 00:03:19,253 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:03:19" (1/1) ... [2019-10-15 00:03:19,255 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:03:19" (1/1) ... [2019-10-15 00:03:19,325 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:03:19" (1/1) ... [2019-10-15 00:03:19,349 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:03:19" (1/1) ... [2019-10-15 00:03:19,361 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:03:19" (1/1) ... [2019-10-15 00:03:19,374 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 00:03:19,374 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 00:03:19,374 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 00:03:19,375 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 00:03:19,375 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:03:19" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 00:03:19,441 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 00:03:19,442 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 00:03:19,442 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-15 00:03:19,442 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 00:03:19,442 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-15 00:03:19,443 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 00:03:19,443 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 00:03:19,443 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-15 00:03:19,443 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 00:03:19,443 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 00:03:19,444 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 00:03:21,291 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 00:03:21,292 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-15 00:03:21,293 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 12:03:21 BoogieIcfgContainer [2019-10-15 00:03:21,294 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 00:03:21,296 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 00:03:21,296 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 00:03:21,301 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 00:03:21,301 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 12:03:18" (1/3) ... [2019-10-15 00:03:21,302 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4bc2b77 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 12:03:21, skipping insertion in model container [2019-10-15 00:03:21,303 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:03:19" (2/3) ... [2019-10-15 00:03:21,304 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4bc2b77 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 12:03:21, skipping insertion in model container [2019-10-15 00:03:21,304 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 12:03:21" (3/3) ... [2019-10-15 00:03:21,306 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem11_label26.c [2019-10-15 00:03:21,321 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 00:03:21,333 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 00:03:21,345 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 00:03:21,389 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 00:03:21,389 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 00:03:21,389 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 00:03:21,389 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 00:03:21,390 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 00:03:21,390 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 00:03:21,390 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 00:03:21,390 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 00:03:21,433 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states. [2019-10-15 00:03:21,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2019-10-15 00:03:21,443 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:03:21,444 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] [2019-10-15 00:03:21,446 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:03:21,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:03:21,453 INFO L82 PathProgramCache]: Analyzing trace with hash -2020342670, now seen corresponding path program 1 times [2019-10-15 00:03:21,463 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:03:21,464 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090437261] [2019-10-15 00:03:21,465 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:03:21,465 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:03:21,465 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:03:21,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:03:21,911 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:03:21,912 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090437261] [2019-10-15 00:03:21,913 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:03:21,914 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 00:03:21,914 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966722595] [2019-10-15 00:03:21,923 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 00:03:21,926 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:03:21,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 00:03:21,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 00:03:21,950 INFO L87 Difference]: Start difference. First operand 292 states. Second operand 3 states. [2019-10-15 00:03:23,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:03:23,543 INFO L93 Difference]: Finished difference Result 779 states and 1369 transitions. [2019-10-15 00:03:23,543 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 00:03:23,545 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 45 [2019-10-15 00:03:23,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:03:23,563 INFO L225 Difference]: With dead ends: 779 [2019-10-15 00:03:23,564 INFO L226 Difference]: Without dead ends: 425 [2019-10-15 00:03:23,573 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 [2019-10-15 00:03:23,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 425 states. [2019-10-15 00:03:23,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 425 to 420. [2019-10-15 00:03:23,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 420 states. [2019-10-15 00:03:23,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 420 states to 420 states and 672 transitions. [2019-10-15 00:03:23,679 INFO L78 Accepts]: Start accepts. Automaton has 420 states and 672 transitions. Word has length 45 [2019-10-15 00:03:23,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:03:23,680 INFO L462 AbstractCegarLoop]: Abstraction has 420 states and 672 transitions. [2019-10-15 00:03:23,680 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 00:03:23,680 INFO L276 IsEmpty]: Start isEmpty. Operand 420 states and 672 transitions. [2019-10-15 00:03:23,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2019-10-15 00:03:23,688 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:03:23,689 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 00:03:23,689 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:03:23,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:03:23,690 INFO L82 PathProgramCache]: Analyzing trace with hash 1793518198, now seen corresponding path program 1 times [2019-10-15 00:03:23,690 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:03:23,690 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648369275] [2019-10-15 00:03:23,690 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:03:23,691 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:03:23,691 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:03:23,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:03:23,939 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:03:23,940 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648369275] [2019-10-15 00:03:23,940 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:03:23,940 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 00:03:23,941 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414059885] [2019-10-15 00:03:23,943 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 00:03:23,944 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:03:23,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 00:03:23,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 00:03:23,945 INFO L87 Difference]: Start difference. First operand 420 states and 672 transitions. Second operand 3 states. [2019-10-15 00:03:25,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:03:25,210 INFO L93 Difference]: Finished difference Result 1217 states and 1972 transitions. [2019-10-15 00:03:25,212 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 00:03:25,212 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 119 [2019-10-15 00:03:25,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:03:25,220 INFO L225 Difference]: With dead ends: 1217 [2019-10-15 00:03:25,220 INFO L226 Difference]: Without dead ends: 803 [2019-10-15 00:03:25,222 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 00:03:25,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 803 states. [2019-10-15 00:03:25,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 803 to 803. [2019-10-15 00:03:25,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 803 states. [2019-10-15 00:03:25,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 803 states to 803 states and 1166 transitions. [2019-10-15 00:03:25,282 INFO L78 Accepts]: Start accepts. Automaton has 803 states and 1166 transitions. Word has length 119 [2019-10-15 00:03:25,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:03:25,283 INFO L462 AbstractCegarLoop]: Abstraction has 803 states and 1166 transitions. [2019-10-15 00:03:25,283 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 00:03:25,283 INFO L276 IsEmpty]: Start isEmpty. Operand 803 states and 1166 transitions. [2019-10-15 00:03:25,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2019-10-15 00:03:25,287 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:03:25,288 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 00:03:25,288 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:03:25,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:03:25,289 INFO L82 PathProgramCache]: Analyzing trace with hash 406650521, now seen corresponding path program 1 times [2019-10-15 00:03:25,289 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:03:25,289 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726858556] [2019-10-15 00:03:25,289 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:03:25,290 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:03:25,290 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:03:25,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:03:25,524 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:03:25,525 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726858556] [2019-10-15 00:03:25,525 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:03:25,525 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-15 00:03:25,526 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050958615] [2019-10-15 00:03:25,529 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-15 00:03:25,529 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:03:25,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-15 00:03:25,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-10-15 00:03:25,530 INFO L87 Difference]: Start difference. First operand 803 states and 1166 transitions. Second operand 6 states. [2019-10-15 00:03:28,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:03:28,089 INFO L93 Difference]: Finished difference Result 2977 states and 4579 transitions. [2019-10-15 00:03:28,091 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 00:03:28,091 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 130 [2019-10-15 00:03:28,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:03:28,114 INFO L225 Difference]: With dead ends: 2977 [2019-10-15 00:03:28,114 INFO L226 Difference]: Without dead ends: 2180 [2019-10-15 00:03:28,118 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-10-15 00:03:28,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2180 states. [2019-10-15 00:03:28,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2180 to 1978. [2019-10-15 00:03:28,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1978 states. [2019-10-15 00:03:28,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1978 states to 1978 states and 2771 transitions. [2019-10-15 00:03:28,248 INFO L78 Accepts]: Start accepts. Automaton has 1978 states and 2771 transitions. Word has length 130 [2019-10-15 00:03:28,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:03:28,249 INFO L462 AbstractCegarLoop]: Abstraction has 1978 states and 2771 transitions. [2019-10-15 00:03:28,249 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-15 00:03:28,249 INFO L276 IsEmpty]: Start isEmpty. Operand 1978 states and 2771 transitions. [2019-10-15 00:03:28,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2019-10-15 00:03:28,264 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:03:28,265 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2019-10-15 00:03:28,265 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:03:28,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:03:28,267 INFO L82 PathProgramCache]: Analyzing trace with hash 622607653, now seen corresponding path program 1 times [2019-10-15 00:03:28,267 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:03:28,268 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917160758] [2019-10-15 00:03:28,268 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:03:28,268 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:03:28,268 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:03:28,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:03:28,588 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 147 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:03:28,589 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917160758] [2019-10-15 00:03:28,589 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [714925479] [2019-10-15 00:03:28,589 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 00:03:28,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:03:28,709 INFO L256 TraceCheckSpWp]: Trace formula consists of 414 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-15 00:03:28,723 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 00:03:28,789 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 147 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:03:28,789 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 00:03:28,944 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 147 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:03:28,945 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [108169260] [2019-10-15 00:03:28,952 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 209 [2019-10-15 00:03:29,024 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-15 00:03:29,025 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2)