java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default-INT-LIM.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem17_label19_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-63daa26 [2018-11-12 19:31:19,732 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-12 19:31:19,734 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-12 19:31:19,747 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-12 19:31:19,747 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-12 19:31:19,748 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-12 19:31:19,749 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-12 19:31:19,751 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-12 19:31:19,753 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-12 19:31:19,754 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-12 19:31:19,755 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-12 19:31:19,755 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-12 19:31:19,756 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-12 19:31:19,757 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-12 19:31:19,758 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-12 19:31:19,759 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-12 19:31:19,760 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-12 19:31:19,762 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-12 19:31:19,764 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-12 19:31:19,766 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-12 19:31:19,767 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-12 19:31:19,768 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-12 19:31:19,771 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-11-12 19:31:19,783 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default-INT-LIM.epf [2018-11-12 19:31:19,811 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-12 19:31:19,812 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-12 19:31:19,815 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-12 19:31:19,815 INFO L133 SettingsManager]: * User list type=DISABLED [2018-11-12 19:31:19,816 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-11-12 19:31:19,816 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-11-12 19:31:19,816 INFO L133 SettingsManager]: * Maximum recursion depth of evaluation operations=6 [2018-11-12 19:31:19,816 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-11-12 19:31:19,817 INFO L133 SettingsManager]: * Octagon Domain=false [2018-11-12 19:31:19,817 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-11-12 19:31:19,817 INFO L133 SettingsManager]: * Log string format=TERM [2018-11-12 19:31:19,817 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-11-12 19:31:19,817 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-11-12 19:31:19,818 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-12 19:31:19,818 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-12 19:31:19,818 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-12 19:31:19,820 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-12 19:31:19,820 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-12 19:31:19,820 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-12 19:31:19,820 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-12 19:31:19,821 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-12 19:31:19,821 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-12 19:31:19,821 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-12 19:31:19,821 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-12 19:31:19,822 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-12 19:31:19,822 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-12 19:31:19,822 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-12 19:31:19,822 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-12 19:31:19,822 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-12 19:31:19,823 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-11-12 19:31:19,823 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-12 19:31:19,823 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-12 19:31:19,823 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-11-12 19:31:19,823 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-11-12 19:31:19,824 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-11-12 19:31:19,867 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-12 19:31:19,881 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-12 19:31:19,885 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-12 19:31:19,888 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-12 19:31:19,888 INFO L276 PluginConnector]: CDTParser initialized [2018-11-12 19:31:19,889 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem17_label19_true-unreach-call.c [2018-11-12 19:31:19,950 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4df239c14/6dc9ecdd383e42f8a38c74937ab18d59/FLAG70037373c [2018-11-12 19:31:20,628 INFO L298 CDTParser]: Found 1 translation units. [2018-11-12 19:31:20,629 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem17_label19_true-unreach-call.c [2018-11-12 19:31:20,659 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4df239c14/6dc9ecdd383e42f8a38c74937ab18d59/FLAG70037373c [2018-11-12 19:31:20,678 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4df239c14/6dc9ecdd383e42f8a38c74937ab18d59 [2018-11-12 19:31:20,693 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-12 19:31:20,695 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-11-12 19:31:20,696 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-12 19:31:20,696 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-12 19:31:20,702 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-12 19:31:20,703 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 07:31:20" (1/1) ... [2018-11-12 19:31:20,707 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@45f13c4a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 07:31:20, skipping insertion in model container [2018-11-12 19:31:20,708 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 07:31:20" (1/1) ... [2018-11-12 19:31:20,718 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-12 19:31:20,836 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-11-12 19:31:21,845 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-12 19:31:21,854 INFO L189 MainTranslator]: Completed pre-run [2018-11-12 19:31:22,272 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-12 19:31:22,298 INFO L193 MainTranslator]: Completed translation [2018-11-12 19:31:22,299 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 07:31:22 WrapperNode [2018-11-12 19:31:22,299 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-12 19:31:22,300 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-12 19:31:22,301 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-12 19:31:22,301 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-12 19:31:22,507 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 07:31:22" (1/1) ... [2018-11-12 19:31:22,557 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 07:31:22" (1/1) ... [2018-11-12 19:31:22,568 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-12 19:31:22,568 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-12 19:31:22,571 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-12 19:31:22,571 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-12 19:31:22,583 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 07:31:22" (1/1) ... [2018-11-12 19:31:22,583 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 07:31:22" (1/1) ... [2018-11-12 19:31:22,595 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 07:31:22" (1/1) ... [2018-11-12 19:31:22,595 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 07:31:22" (1/1) ... [2018-11-12 19:31:22,694 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 07:31:22" (1/1) ... [2018-11-12 19:31:22,716 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 07:31:22" (1/1) ... [2018-11-12 19:31:22,742 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 07:31:22" (1/1) ... [2018-11-12 19:31:22,786 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-12 19:31:22,787 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-12 19:31:22,787 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-12 19:31:22,787 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-12 19:31:22,788 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 07:31:22" (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 [2018-11-12 19:31:22,863 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2018-11-12 19:31:22,864 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-12 19:31:22,864 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-12 19:31:22,864 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2018-11-12 19:31:22,864 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2018-11-12 19:31:22,865 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-11-12 19:31:22,865 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-11-12 19:31:22,865 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-12 19:31:22,865 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-12 19:31:22,867 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-12 19:31:22,867 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-12 19:31:31,465 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-12 19:31:31,466 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 07:31:31 BoogieIcfgContainer [2018-11-12 19:31:31,466 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-12 19:31:31,467 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-12 19:31:31,468 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-12 19:31:31,471 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-12 19:31:31,471 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 07:31:20" (1/3) ... [2018-11-12 19:31:31,472 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d488ef3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 07:31:31, skipping insertion in model container [2018-11-12 19:31:31,472 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 07:31:22" (2/3) ... [2018-11-12 19:31:31,473 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d488ef3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 07:31:31, skipping insertion in model container [2018-11-12 19:31:31,473 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 07:31:31" (3/3) ... [2018-11-12 19:31:31,475 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem17_label19_true-unreach-call.c [2018-11-12 19:31:31,485 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-12 19:31:31,495 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-12 19:31:31,511 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-12 19:31:31,557 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-12 19:31:31,557 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-12 19:31:31,557 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-12 19:31:31,557 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-12 19:31:31,557 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-12 19:31:31,557 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-12 19:31:31,558 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-12 19:31:31,558 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-12 19:31:31,595 INFO L276 IsEmpty]: Start isEmpty. Operand 604 states. [2018-11-12 19:31:31,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-11-12 19:31:31,604 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 19:31:31,606 INFO L375 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] [2018-11-12 19:31:31,608 INFO L423 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 19:31:31,615 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 19:31:31,615 INFO L82 PathProgramCache]: Analyzing trace with hash 1876496990, now seen corresponding path program 1 times [2018-11-12 19:31:31,617 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 19:31:31,666 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 19:31:31,667 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 19:31:31,667 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 19:31:31,667 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 19:31:31,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 19:31:32,081 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-12 19:31:32,086 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-12 19:31:32,086 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-12 19:31:32,086 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 19:31:32,092 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-12 19:31:32,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-12 19:31:32,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-12 19:31:32,111 INFO L87 Difference]: Start difference. First operand 604 states. Second operand 4 states. [2018-11-12 19:31:41,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 19:31:41,177 INFO L93 Difference]: Finished difference Result 2164 states and 4009 transitions. [2018-11-12 19:31:41,177 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-12 19:31:41,178 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 49 [2018-11-12 19:31:41,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 19:31:41,212 INFO L225 Difference]: With dead ends: 2164 [2018-11-12 19:31:41,212 INFO L226 Difference]: Without dead ends: 1554 [2018-11-12 19:31:41,222 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-12 19:31:41,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1554 states. [2018-11-12 19:31:41,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1554 to 1052. [2018-11-12 19:31:41,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1052 states. [2018-11-12 19:31:41,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1052 states to 1052 states and 1882 transitions. [2018-11-12 19:31:41,372 INFO L78 Accepts]: Start accepts. Automaton has 1052 states and 1882 transitions. Word has length 49 [2018-11-12 19:31:41,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 19:31:41,373 INFO L480 AbstractCegarLoop]: Abstraction has 1052 states and 1882 transitions. [2018-11-12 19:31:41,373 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-12 19:31:41,373 INFO L276 IsEmpty]: Start isEmpty. Operand 1052 states and 1882 transitions. [2018-11-12 19:31:41,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2018-11-12 19:31:41,387 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 19:31:41,388 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-12 19:31:41,388 INFO L423 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 19:31:41,388 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 19:31:41,388 INFO L82 PathProgramCache]: Analyzing trace with hash 1564943023, now seen corresponding path program 1 times [2018-11-12 19:31:41,389 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 19:31:41,390 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 19:31:41,391 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 19:31:41,391 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 19:31:41,391 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 19:31:41,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 19:31:41,748 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-12 19:31:41,749 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-12 19:31:41,749 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-12 19:31:41,749 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 19:31:41,751 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-12 19:31:41,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-12 19:31:41,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-12 19:31:41,752 INFO L87 Difference]: Start difference. First operand 1052 states and 1882 transitions. Second operand 5 states. [2018-11-12 19:31:48,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 19:31:48,988 INFO L93 Difference]: Finished difference Result 3031 states and 5537 transitions. [2018-11-12 19:31:48,989 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-12 19:31:48,989 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 121 [2018-11-12 19:31:48,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 19:31:49,004 INFO L225 Difference]: With dead ends: 3031 [2018-11-12 19:31:49,004 INFO L226 Difference]: Without dead ends: 1985 [2018-11-12 19:31:49,009 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-11-12 19:31:49,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1985 states. [2018-11-12 19:31:49,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1985 to 1959. [2018-11-12 19:31:49,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1959 states. [2018-11-12 19:31:49,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1959 states to 1959 states and 3239 transitions. [2018-11-12 19:31:49,077 INFO L78 Accepts]: Start accepts. Automaton has 1959 states and 3239 transitions. Word has length 121 [2018-11-12 19:31:49,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 19:31:49,077 INFO L480 AbstractCegarLoop]: Abstraction has 1959 states and 3239 transitions. [2018-11-12 19:31:49,077 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-12 19:31:49,078 INFO L276 IsEmpty]: Start isEmpty. Operand 1959 states and 3239 transitions. [2018-11-12 19:31:49,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2018-11-12 19:31:49,085 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 19:31:49,086 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-12 19:31:49,086 INFO L423 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 19:31:49,086 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 19:31:49,086 INFO L82 PathProgramCache]: Analyzing trace with hash -1382747383, now seen corresponding path program 1 times [2018-11-12 19:31:49,087 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 19:31:49,088 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 19:31:49,088 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 19:31:49,088 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 19:31:49,088 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 19:31:49,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 19:31:49,465 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-12 19:31:49,466 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 19:31:49,466 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 19:31:49,467 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 125 with the following transitions: [2018-11-12 19:31:49,469 INFO L202 CegarAbsIntRunner]: [0], [1], [711], [718], [726], [734], [742], [750], [758], [766], [774], [782], [790], [798], [806], [814], [822], [830], [838], [846], [854], [862], [870], [878], [886], [894], [902], [910], [918], [926], [934], [942], [950], [958], [966], [974], [982], [990], [998], [1002], [1004], [1007], [1015], [1023], [1031], [1039], [1047], [1055], [1063], [1071], [1079], [1087], [1095], [1103], [1111], [1119], [1127], [1135], [1143], [1151], [1159], [1167], [1175], [1183], [1191], [1199], [1204], [1208], [1212], [1216], [1220], [1223], [2279], [2283], [2287], [2293], [2297], [2299], [2306], [2307], [2308], [2310], [2311] [2018-11-12 19:31:49,519 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 19:31:49,519 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 19:31:49,989 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 19:31:50,823 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-12 19:31:50,825 INFO L272 AbstractInterpreter]: Visited 83 different actions 235 times. Merged at 5 different actions 9 times. Never widened. Performed 3917 root evaluator evaluations with a maximum evaluation depth of 6. Performed 3917 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 1 fixpoints after 1 different actions. Largest state had 26 variables. [2018-11-12 19:31:50,859 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 19:31:50,860 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-12 19:31:50,861 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 19:31:50,861 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-12 19:31:50,885 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 19:31:50,886 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-12 19:31:50,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 19:31:50,994 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-12 19:31:54,622 WARN L179 SmtUtils]: Spent 3.09 s on a formula simplification that was a NOOP. DAG size: 42 [2018-11-12 19:31:55,389 WARN L179 SmtUtils]: Spent 646.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 21 [2018-11-12 19:31:55,544 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-12 19:31:55,544 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-12 19:31:56,914 WARN L179 SmtUtils]: Spent 342.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 25 [2018-11-12 19:31:57,401 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-12 19:31:57,446 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-11-12 19:31:57,447 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 15 [2018-11-12 19:31:57,447 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 19:31:57,448 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-12 19:31:57,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-12 19:31:57,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2018-11-12 19:31:57,449 INFO L87 Difference]: Start difference. First operand 1959 states and 3239 transitions. Second operand 6 states. [2018-11-12 19:35:31,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 19:35:31,858 INFO L93 Difference]: Finished difference Result 7537 states and 12954 transitions. [2018-11-12 19:35:31,858 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-12 19:35:31,859 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 124 [2018-11-12 19:35:31,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 19:35:31,896 INFO L225 Difference]: With dead ends: 7537 [2018-11-12 19:35:31,897 INFO L226 Difference]: Without dead ends: 5584 [2018-11-12 19:35:31,914 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 242 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2018-11-12 19:35:31,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5584 states. [2018-11-12 19:35:32,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5584 to 5578. [2018-11-12 19:35:32,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5578 states. [2018-11-12 19:35:32,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5578 states to 5578 states and 8848 transitions. [2018-11-12 19:35:32,098 INFO L78 Accepts]: Start accepts. Automaton has 5578 states and 8848 transitions. Word has length 124 [2018-11-12 19:35:32,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 19:35:32,099 INFO L480 AbstractCegarLoop]: Abstraction has 5578 states and 8848 transitions. [2018-11-12 19:35:32,099 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-12 19:35:32,099 INFO L276 IsEmpty]: Start isEmpty. Operand 5578 states and 8848 transitions. [2018-11-12 19:35:32,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2018-11-12 19:35:32,104 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 19:35:32,104 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-12 19:35:32,105 INFO L423 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 19:35:32,105 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 19:35:32,105 INFO L82 PathProgramCache]: Analyzing trace with hash 1130206287, now seen corresponding path program 1 times [2018-11-12 19:35:32,105 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 19:35:32,106 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 19:35:32,106 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 19:35:32,107 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 19:35:32,107 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 19:35:32,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 19:35:32,393 WARN L179 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-11-12 19:35:32,566 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 36 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-12 19:35:32,567 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 19:35:32,567 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 19:35:32,567 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 138 with the following transitions: [2018-11-12 19:35:32,568 INFO L202 CegarAbsIntRunner]: [0], [1], [711], [718], [726], [734], [742], [750], [758], [766], [774], [782], [790], [798], [806], [814], [822], [830], [838], [846], [854], [862], [870], [878], [886], [894], [902], [910], [918], [926], [934], [942], [950], [958], [966], [974], [982], [990], [998], [1002], [1004], [1007], [1015], [1023], [1031], [1039], [1047], [1055], [1063], [1071], [1079], [1087], [1095], [1103], [1111], [1119], [1127], [1135], [1143], [1151], [1159], [1167], [1175], [1183], [1191], [1199], [1204], [1208], [1212], [1216], [1220], [1224], [1228], [1232], [1236], [1240], [1244], [1255], [1259], [1263], [1267], [1271], [1275], [1279], [1282], [2279], [2283], [2287], [2293], [2297], [2299], [2306], [2307], [2308], [2310], [2311] [2018-11-12 19:35:32,578 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 19:35:32,578 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 19:35:32,708 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 19:35:33,365 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-12 19:35:33,366 INFO L272 AbstractInterpreter]: Visited 96 different actions 274 times. Merged at 5 different actions 9 times. Never widened. Performed 4230 root evaluator evaluations with a maximum evaluation depth of 6. Performed 4230 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 1 fixpoints after 1 different actions. Largest state had 26 variables. [2018-11-12 19:35:33,403 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 19:35:33,404 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-12 19:35:33,404 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 19:35:33,404 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-12 19:35:33,424 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 19:35:33,425 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-12 19:35:33,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 19:35:33,494 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-12 19:35:33,606 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-12 19:35:33,606 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-12 19:35:34,088 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-12 19:35:34,118 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-11-12 19:35:34,118 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [7] total 8 [2018-11-12 19:35:34,118 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 19:35:34,119 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-12 19:35:34,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-12 19:35:34,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2018-11-12 19:35:34,120 INFO L87 Difference]: Start difference. First operand 5578 states and 8848 transitions. Second operand 3 states. [2018-11-12 19:35:37,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 19:35:37,846 INFO L93 Difference]: Finished difference Result 13779 states and 21870 transitions. [2018-11-12 19:35:37,850 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-12 19:35:37,850 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 137 [2018-11-12 19:35:37,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 19:35:37,894 INFO L225 Difference]: With dead ends: 13779 [2018-11-12 19:35:37,894 INFO L226 Difference]: Without dead ends: 8207 [2018-11-12 19:35:37,934 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 283 GetRequests, 273 SyntacticMatches, 4 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2018-11-12 19:35:37,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8207 states. [2018-11-12 19:35:38,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8207 to 8206. [2018-11-12 19:35:38,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8206 states. [2018-11-12 19:35:38,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8206 states to 8206 states and 12272 transitions. [2018-11-12 19:35:38,177 INFO L78 Accepts]: Start accepts. Automaton has 8206 states and 12272 transitions. Word has length 137 [2018-11-12 19:35:38,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 19:35:38,177 INFO L480 AbstractCegarLoop]: Abstraction has 8206 states and 12272 transitions. [2018-11-12 19:35:38,178 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-12 19:35:38,178 INFO L276 IsEmpty]: Start isEmpty. Operand 8206 states and 12272 transitions. [2018-11-12 19:35:38,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2018-11-12 19:35:38,183 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 19:35:38,183 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-12 19:35:38,184 INFO L423 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 19:35:38,184 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 19:35:38,184 INFO L82 PathProgramCache]: Analyzing trace with hash 1656879347, now seen corresponding path program 1 times [2018-11-12 19:35:38,184 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 19:35:38,185 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 19:35:38,185 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 19:35:38,185 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 19:35:38,186 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 19:35:38,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 19:35:38,536 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-12 19:35:38,536 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-12 19:35:38,536 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-12 19:35:38,536 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 19:35:38,537 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-12 19:35:38,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-12 19:35:38,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-12 19:35:38,539 INFO L87 Difference]: Start difference. First operand 8206 states and 12272 transitions. Second operand 5 states. Received shutdown request... [2018-11-12 19:35:44,550 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-11-12 19:35:44,551 WARN L549 AbstractCegarLoop]: Verification canceled [2018-11-12 19:35:44,556 WARN L205 ceAbstractionStarter]: Timeout [2018-11-12 19:35:44,557 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.11 07:35:44 BoogieIcfgContainer [2018-11-12 19:35:44,557 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-12 19:35:44,558 INFO L168 Benchmark]: Toolchain (without parser) took 263864.66 ms. Allocated memory was 1.5 GB in the beginning and 2.7 GB in the end (delta: 1.2 GB). Free memory was 1.4 GB in the beginning and 1.5 GB in the end (delta: -131.7 MB). Peak memory consumption was 1.0 GB. Max. memory is 7.1 GB. [2018-11-12 19:35:44,559 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-11-12 19:35:44,560 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1603.54 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 126.8 MB). Peak memory consumption was 126.8 MB. Max. memory is 7.1 GB. [2018-11-12 19:35:44,561 INFO L168 Benchmark]: Boogie Procedure Inliner took 267.77 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 760.2 MB). Free memory was 1.3 GB in the beginning and 2.2 GB in the end (delta: -942.1 MB). Peak memory consumption was 42.3 MB. Max. memory is 7.1 GB. [2018-11-12 19:35:44,562 INFO L168 Benchmark]: Boogie Preprocessor took 218.24 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.2 GB in the end (delta: 14.1 MB). Peak memory consumption was 14.1 MB. Max. memory is 7.1 GB. [2018-11-12 19:35:44,563 INFO L168 Benchmark]: RCFGBuilder took 8679.01 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 1.7 GB in the end (delta: 450.9 MB). Peak memory consumption was 450.9 MB. Max. memory is 7.1 GB. [2018-11-12 19:35:44,564 INFO L168 Benchmark]: TraceAbstraction took 253090.12 ms. Allocated memory was 2.3 GB in the beginning and 2.7 GB in the end (delta: 407.4 MB). Free memory was 1.7 GB in the beginning and 1.5 GB in the end (delta: 218.6 MB). Peak memory consumption was 626.0 MB. Max. memory is 7.1 GB. [2018-11-12 19:35:44,569 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 1603.54 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 126.8 MB). Peak memory consumption was 126.8 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 267.77 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 760.2 MB). Free memory was 1.3 GB in the beginning and 2.2 GB in the end (delta: -942.1 MB). Peak memory consumption was 42.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 218.24 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.2 GB in the end (delta: 14.1 MB). Peak memory consumption was 14.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 8679.01 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 1.7 GB in the end (delta: 450.9 MB). Peak memory consumption was 450.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 253090.12 ms. Allocated memory was 2.3 GB in the beginning and 2.7 GB in the end (delta: 407.4 MB). Free memory was 1.7 GB in the beginning and 1.5 GB in the end (delta: 218.6 MB). Peak memory consumption was 626.0 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 134]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 134). Cancelled while BasicCegarLoop was constructing difference of abstraction (8206states) and FLOYD_HOARE automaton (currently 8 states, 5 states before enhancement),while ReachableStatesComputation was computing reachable states (15376 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 604 locations, 1 error locations. TIMEOUT Result, 253.0s OverallTime, 5 OverallIterations, 2 TraceHistogramMax, 240.6s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 1682 SDtfs, 6862 SDslu, 1209 SDs, 0 SdLazy, 13052 SolverSat, 3275 SolverUnsat, 88 SolverUnknown, 0 SolverNotchecked, 234.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 563 GetRequests, 524 SyntacticMatches, 6 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 7.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=8206occurred in iteration=4, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 2.2s AbstIntTime, 2 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.6s AutomataMinimizationTime, 4 MinimizatonAttempts, 535 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 8.5s InterpolantComputationTime, 831 NumberOfCodeBlocks, 831 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 1083 ConstructedInterpolants, 123 QuantifiedInterpolants, 829421 SizeOfPredicates, 5 NumberOfNonLiveVariables, 567 ConjunctsInSsa, 13 ConjunctsInUnsatCore, 9 InterpolantComputations, 6 PerfectInterpolantSequences, 250/336 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown