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.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem16_label06_false-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-df4b876 [2018-11-07 00:32:06,588 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-07 00:32:06,590 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-07 00:32:06,603 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-07 00:32:06,603 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-07 00:32:06,605 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-07 00:32:06,606 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-07 00:32:06,609 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-07 00:32:06,612 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-07 00:32:06,613 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-07 00:32:06,615 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-07 00:32:06,615 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-07 00:32:06,616 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-07 00:32:06,617 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-07 00:32:06,618 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-07 00:32:06,619 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-07 00:32:06,620 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-07 00:32:06,621 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-07 00:32:06,623 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-07 00:32:06,625 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-07 00:32:06,626 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-07 00:32:06,627 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-07 00:32:06,629 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-11-07 00:32:06,636 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-07 00:32:06,636 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-07 00:32:06,637 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-07 00:32:06,638 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-07 00:32:06,638 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default.epf [2018-11-07 00:32:06,654 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-07 00:32:06,654 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-07 00:32:06,655 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-07 00:32:06,655 INFO L133 SettingsManager]: * User list type=DISABLED [2018-11-07 00:32:06,655 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-11-07 00:32:06,655 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-11-07 00:32:06,656 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-11-07 00:32:06,656 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-11-07 00:32:06,656 INFO L133 SettingsManager]: * Log string format=TERM [2018-11-07 00:32:06,656 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-11-07 00:32:06,656 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-11-07 00:32:06,657 INFO L133 SettingsManager]: * Interval Domain=false [2018-11-07 00:32:06,657 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-07 00:32:06,658 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-07 00:32:06,658 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-07 00:32:06,658 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-07 00:32:06,658 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-07 00:32:06,658 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-07 00:32:06,659 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-07 00:32:06,659 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-07 00:32:06,659 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-07 00:32:06,659 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-07 00:32:06,659 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-07 00:32:06,659 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-07 00:32:06,660 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-07 00:32:06,660 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-07 00:32:06,660 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-07 00:32:06,660 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-07 00:32:06,660 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-11-07 00:32:06,661 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-07 00:32:06,661 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-07 00:32:06,661 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-11-07 00:32:06,661 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-11-07 00:32:06,661 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-11-07 00:32:06,724 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-07 00:32:06,740 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-07 00:32:06,744 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-07 00:32:06,745 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-07 00:32:06,746 INFO L276 PluginConnector]: CDTParser initialized [2018-11-07 00:32:06,746 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem16_label06_false-unreach-call.c [2018-11-07 00:32:06,813 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d19c5a2d4/bb6876305fa94503a81e9df5ea11a3fe/FLAG79edcaef1 [2018-11-07 00:32:07,517 INFO L298 CDTParser]: Found 1 translation units. [2018-11-07 00:32:07,518 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem16_label06_false-unreach-call.c [2018-11-07 00:32:07,543 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d19c5a2d4/bb6876305fa94503a81e9df5ea11a3fe/FLAG79edcaef1 [2018-11-07 00:32:07,559 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d19c5a2d4/bb6876305fa94503a81e9df5ea11a3fe [2018-11-07 00:32:07,571 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-07 00:32:07,573 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-11-07 00:32:07,575 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-07 00:32:07,575 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-07 00:32:07,579 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-07 00:32:07,580 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 12:32:07" (1/1) ... [2018-11-07 00:32:07,584 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@567b4d96 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:32:07, skipping insertion in model container [2018-11-07 00:32:07,584 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 12:32:07" (1/1) ... [2018-11-07 00:32:07,595 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-07 00:32:07,675 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-11-07 00:32:08,394 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-07 00:32:08,399 INFO L189 MainTranslator]: Completed pre-run [2018-11-07 00:32:08,687 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-07 00:32:08,709 INFO L193 MainTranslator]: Completed translation [2018-11-07 00:32:08,709 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:32:08 WrapperNode [2018-11-07 00:32:08,709 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-07 00:32:08,711 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-07 00:32:08,711 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-07 00:32:08,711 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-07 00:32:08,721 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:32:08" (1/1) ... [2018-11-07 00:32:08,884 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:32:08" (1/1) ... [2018-11-07 00:32:08,899 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-07 00:32:08,899 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-07 00:32:08,902 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-07 00:32:08,902 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-07 00:32:08,915 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:32:08" (1/1) ... [2018-11-07 00:32:08,915 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:32:08" (1/1) ... [2018-11-07 00:32:08,931 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:32:08" (1/1) ... [2018-11-07 00:32:08,931 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:32:08" (1/1) ... [2018-11-07 00:32:08,996 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:32:08" (1/1) ... [2018-11-07 00:32:09,026 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:32:08" (1/1) ... [2018-11-07 00:32:09,044 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:32:08" (1/1) ... [2018-11-07 00:32:09,061 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-07 00:32:09,062 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-07 00:32:09,062 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-07 00:32:09,062 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-07 00:32:09,063 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:32:08" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-07 00:32:09,147 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2018-11-07 00:32:09,147 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-07 00:32:09,148 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-07 00:32:09,148 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2018-11-07 00:32:09,148 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2018-11-07 00:32:09,148 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-11-07 00:32:09,148 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-11-07 00:32:09,149 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-07 00:32:09,149 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-07 00:32:09,150 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-07 00:32:09,150 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-07 00:32:15,003 INFO L276 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-07 00:32:15,004 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 12:32:15 BoogieIcfgContainer [2018-11-07 00:32:15,004 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-07 00:32:15,005 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-07 00:32:15,007 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-07 00:32:15,010 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-07 00:32:15,011 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 12:32:07" (1/3) ... [2018-11-07 00:32:15,011 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b302e9c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 12:32:15, skipping insertion in model container [2018-11-07 00:32:15,013 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:32:08" (2/3) ... [2018-11-07 00:32:15,014 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b302e9c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 12:32:15, skipping insertion in model container [2018-11-07 00:32:15,014 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 12:32:15" (3/3) ... [2018-11-07 00:32:15,016 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem16_label06_false-unreach-call.c [2018-11-07 00:32:15,028 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-07 00:32:15,041 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-07 00:32:15,064 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-07 00:32:15,107 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-07 00:32:15,107 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-07 00:32:15,107 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-07 00:32:15,107 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-07 00:32:15,108 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-07 00:32:15,108 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-07 00:32:15,108 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-07 00:32:15,108 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-07 00:32:15,141 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states. [2018-11-07 00:32:15,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-11-07 00:32:15,149 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 00:32:15,150 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 00:32:15,152 INFO L423 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 00:32:15,159 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 00:32:15,159 INFO L82 PathProgramCache]: Analyzing trace with hash 973214763, now seen corresponding path program 1 times [2018-11-07 00:32:15,162 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 00:32:15,219 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 00:32:15,220 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 00:32:15,220 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 00:32:15,220 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 00:32:15,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 00:32:15,569 WARN L179 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 8 DAG size of output: 3 [2018-11-07 00:32:15,577 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 00:32:15,580 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 00:32:15,581 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-07 00:32:15,581 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 00:32:15,587 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-07 00:32:15,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-07 00:32:15,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-07 00:32:15,608 INFO L87 Difference]: Start difference. First operand 410 states. Second operand 4 states. [2018-11-07 00:32:21,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 00:32:21,835 INFO L93 Difference]: Finished difference Result 1513 states and 2838 transitions. [2018-11-07 00:32:21,837 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-07 00:32:21,838 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2018-11-07 00:32:21,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 00:32:21,865 INFO L225 Difference]: With dead ends: 1513 [2018-11-07 00:32:21,865 INFO L226 Difference]: Without dead ends: 1097 [2018-11-07 00:32:21,875 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-07 00:32:21,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1097 states. [2018-11-07 00:32:22,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1097 to 1097. [2018-11-07 00:32:22,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1097 states. [2018-11-07 00:32:22,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1097 states to 1097 states and 1954 transitions. [2018-11-07 00:32:22,022 INFO L78 Accepts]: Start accepts. Automaton has 1097 states and 1954 transitions. Word has length 17 [2018-11-07 00:32:22,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 00:32:22,023 INFO L480 AbstractCegarLoop]: Abstraction has 1097 states and 1954 transitions. [2018-11-07 00:32:22,023 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-07 00:32:22,023 INFO L276 IsEmpty]: Start isEmpty. Operand 1097 states and 1954 transitions. [2018-11-07 00:32:22,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2018-11-07 00:32:22,031 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 00:32:22,031 INFO L375 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] [2018-11-07 00:32:22,031 INFO L423 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 00:32:22,032 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 00:32:22,032 INFO L82 PathProgramCache]: Analyzing trace with hash -804123419, now seen corresponding path program 1 times [2018-11-07 00:32:22,032 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 00:32:22,033 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 00:32:22,033 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 00:32:22,034 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 00:32:22,034 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 00:32:22,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 00:32:22,351 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 00:32:22,352 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 00:32:22,352 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-11-07 00:32:22,352 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 00:32:22,354 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-07 00:32:22,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-07 00:32:22,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-11-07 00:32:22,355 INFO L87 Difference]: Start difference. First operand 1097 states and 1954 transitions. Second operand 6 states. [2018-11-07 00:32:26,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 00:32:26,933 INFO L93 Difference]: Finished difference Result 3259 states and 5952 transitions. [2018-11-07 00:32:26,941 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-07 00:32:26,941 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 88 [2018-11-07 00:32:26,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 00:32:26,967 INFO L225 Difference]: With dead ends: 3259 [2018-11-07 00:32:26,967 INFO L226 Difference]: Without dead ends: 2168 [2018-11-07 00:32:26,974 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-11-07 00:32:26,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2168 states. [2018-11-07 00:32:27,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2168 to 2142. [2018-11-07 00:32:27,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2142 states. [2018-11-07 00:32:27,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2142 states to 2142 states and 3739 transitions. [2018-11-07 00:32:27,074 INFO L78 Accepts]: Start accepts. Automaton has 2142 states and 3739 transitions. Word has length 88 [2018-11-07 00:32:27,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 00:32:27,075 INFO L480 AbstractCegarLoop]: Abstraction has 2142 states and 3739 transitions. [2018-11-07 00:32:27,075 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-07 00:32:27,075 INFO L276 IsEmpty]: Start isEmpty. Operand 2142 states and 3739 transitions. [2018-11-07 00:32:27,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2018-11-07 00:32:27,082 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 00:32:27,084 INFO L375 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, 1, 1, 1, 1] [2018-11-07 00:32:27,084 INFO L423 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 00:32:27,084 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 00:32:27,085 INFO L82 PathProgramCache]: Analyzing trace with hash -778915235, now seen corresponding path program 1 times [2018-11-07 00:32:27,085 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 00:32:27,086 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 00:32:27,086 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 00:32:27,086 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 00:32:27,087 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 00:32:27,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 00:32:27,596 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 00:32:27,596 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 00:32:27,597 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-11-07 00:32:27,597 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 00:32:27,597 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-07 00:32:27,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-07 00:32:27,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-11-07 00:32:27,598 INFO L87 Difference]: Start difference. First operand 2142 states and 3739 transitions. Second operand 6 states. [2018-11-07 00:32:32,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 00:32:32,504 INFO L93 Difference]: Finished difference Result 7047 states and 12676 transitions. [2018-11-07 00:32:32,507 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-07 00:32:32,507 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 116 [2018-11-07 00:32:32,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 00:32:32,544 INFO L225 Difference]: With dead ends: 7047 [2018-11-07 00:32:32,545 INFO L226 Difference]: Without dead ends: 4911 [2018-11-07 00:32:32,566 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-11-07 00:32:32,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4911 states. [2018-11-07 00:32:32,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4911 to 4871. [2018-11-07 00:32:32,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4871 states. [2018-11-07 00:32:32,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4871 states to 4871 states and 7884 transitions. [2018-11-07 00:32:32,714 INFO L78 Accepts]: Start accepts. Automaton has 4871 states and 7884 transitions. Word has length 116 [2018-11-07 00:32:32,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 00:32:32,715 INFO L480 AbstractCegarLoop]: Abstraction has 4871 states and 7884 transitions. [2018-11-07 00:32:32,715 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-07 00:32:32,715 INFO L276 IsEmpty]: Start isEmpty. Operand 4871 states and 7884 transitions. [2018-11-07 00:32:32,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2018-11-07 00:32:32,722 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 00:32:32,723 INFO L375 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 00:32:32,723 INFO L423 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 00:32:32,723 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 00:32:32,723 INFO L82 PathProgramCache]: Analyzing trace with hash 2071209528, now seen corresponding path program 1 times [2018-11-07 00:32:32,724 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 00:32:32,725 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 00:32:32,725 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 00:32:32,725 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 00:32:32,725 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 00:32:32,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 00:32:33,053 WARN L179 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-11-07 00:32:33,255 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 00:32:33,256 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 00:32:33,256 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-11-07 00:32:33,256 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 00:32:33,257 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-07 00:32:33,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-07 00:32:33,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-11-07 00:32:33,258 INFO L87 Difference]: Start difference. First operand 4871 states and 7884 transitions. Second operand 6 states. [2018-11-07 00:32:37,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 00:32:37,131 INFO L93 Difference]: Finished difference Result 12812 states and 21358 transitions. [2018-11-07 00:32:37,134 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-07 00:32:37,134 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 181 [2018-11-07 00:32:37,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 00:32:37,195 INFO L225 Difference]: With dead ends: 12812 [2018-11-07 00:32:37,196 INFO L226 Difference]: Without dead ends: 7947 [2018-11-07 00:32:37,242 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-11-07 00:32:37,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7947 states. [2018-11-07 00:32:37,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7947 to 7906. [2018-11-07 00:32:37,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7906 states. [2018-11-07 00:32:37,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7906 states to 7906 states and 12226 transitions. [2018-11-07 00:32:37,566 INFO L78 Accepts]: Start accepts. Automaton has 7906 states and 12226 transitions. Word has length 181 [2018-11-07 00:32:37,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 00:32:37,566 INFO L480 AbstractCegarLoop]: Abstraction has 7906 states and 12226 transitions. [2018-11-07 00:32:37,567 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-07 00:32:37,567 INFO L276 IsEmpty]: Start isEmpty. Operand 7906 states and 12226 transitions. [2018-11-07 00:32:37,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2018-11-07 00:32:37,573 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 00:32:37,573 INFO L375 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 00:32:37,573 INFO L423 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 00:32:37,573 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 00:32:37,574 INFO L82 PathProgramCache]: Analyzing trace with hash 1111726163, now seen corresponding path program 1 times [2018-11-07 00:32:37,574 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 00:32:37,575 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 00:32:37,575 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 00:32:37,575 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 00:32:37,575 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 00:32:37,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 00:32:37,834 WARN L179 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-11-07 00:32:37,884 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 20 proven. 68 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-11-07 00:32:37,885 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 00:32:37,885 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 00:32:37,886 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 208 with the following transitions: [2018-11-07 00:32:37,888 INFO L202 CegarAbsIntRunner]: [0], [1], [180], [187], [195], [203], [211], [215], [217], [220], [228], [236], [244], [252], [260], [268], [276], [284], [292], [300], [308], [316], [324], [332], [340], [348], [356], [364], [372], [380], [388], [396], [404], [412], [420], [428], [436], [444], [452], [460], [468], [476], [484], [492], [500], [508], [516], [524], [532], [540], [548], [556], [564], [572], [580], [588], [596], [604], [612], [620], [628], [636], [644], [652], [660], [668], [673], [677], [681], [684], [685], [689], [693], [697], [701], [705], [709], [713], [717], [721], [725], [729], [733], [737], [741], [745], [749], [753], [757], [761], [765], [769], [773], [777], [781], [785], [789], [793], [797], [801], [805], [809], [813], [817], [821], [825], [829], [833], [837], [841], [845], [849], [853], [857], [860], [1552], [1556], [1560], [1566], [1570], [1572], [1579], [1580], [1581], [1583], [1584] [2018-11-07 00:32:37,963 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-11-07 00:32:37,963 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 00:32:39,432 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 00:32:40,841 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-07 00:32:40,843 INFO L272 AbstractInterpreter]: Visited 122 different actions 122 times. Never merged. Never widened. Never found a fixpoint. Largest state had 24 variables. [2018-11-07 00:32:40,853 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 00:32:40,853 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-07 00:32:42,641 INFO L227 lantSequenceWeakener]: Weakened 199 states. On average, predicates are now at 77.35% of their original sizes. [2018-11-07 00:32:42,642 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-07 00:32:42,964 INFO L415 sIntCurrentIteration]: We unified 206 AI predicates to 206 [2018-11-07 00:32:42,964 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-07 00:32:42,965 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-07 00:32:42,965 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [6] total 11 [2018-11-07 00:32:42,965 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 00:32:42,966 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-11-07 00:32:42,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-07 00:32:42,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2018-11-07 00:32:42,967 INFO L87 Difference]: Start difference. First operand 7906 states and 12226 transitions. Second operand 7 states. [2018-11-07 00:33:20,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 00:33:20,148 INFO L93 Difference]: Finished difference Result 16146 states and 24936 transitions. [2018-11-07 00:33:20,149 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-07 00:33:20,149 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 207 [2018-11-07 00:33:20,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 00:33:20,193 INFO L225 Difference]: With dead ends: 16146 [2018-11-07 00:33:20,193 INFO L226 Difference]: Without dead ends: 8246 [2018-11-07 00:33:20,225 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 207 GetRequests, 201 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2018-11-07 00:33:20,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8246 states. [2018-11-07 00:33:20,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8246 to 8244. [2018-11-07 00:33:20,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8244 states. [2018-11-07 00:33:20,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8244 states to 8244 states and 12573 transitions. [2018-11-07 00:33:20,439 INFO L78 Accepts]: Start accepts. Automaton has 8244 states and 12573 transitions. Word has length 207 [2018-11-07 00:33:20,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 00:33:20,439 INFO L480 AbstractCegarLoop]: Abstraction has 8244 states and 12573 transitions. [2018-11-07 00:33:20,440 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-11-07 00:33:20,440 INFO L276 IsEmpty]: Start isEmpty. Operand 8244 states and 12573 transitions. [2018-11-07 00:33:20,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 300 [2018-11-07 00:33:20,449 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 00:33:20,449 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 00:33:20,449 INFO L423 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 00:33:20,450 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 00:33:20,450 INFO L82 PathProgramCache]: Analyzing trace with hash 1111781520, now seen corresponding path program 1 times [2018-11-07 00:33:20,450 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 00:33:20,451 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 00:33:20,451 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 00:33:20,451 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 00:33:20,451 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 00:33:20,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 00:33:20,786 WARN L179 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-11-07 00:33:21,079 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 36 proven. 158 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2018-11-07 00:33:21,080 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 00:33:21,080 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 00:33:21,080 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 300 with the following transitions: [2018-11-07 00:33:21,081 INFO L202 CegarAbsIntRunner]: [0], [1], [180], [187], [195], [203], [211], [215], [217], [220], [228], [236], [244], [252], [260], [268], [276], [284], [292], [300], [308], [316], [324], [332], [340], [348], [356], [364], [372], [380], [388], [396], [404], [412], [420], [428], [436], [444], [452], [460], [468], [476], [484], [492], [500], [508], [516], [524], [532], [540], [548], [556], [564], [572], [580], [588], [596], [604], [612], [620], [628], [636], [644], [652], [660], [668], [673], [677], [681], [684], [685], [689], [693], [697], [701], [705], [709], [713], [717], [721], [725], [729], [733], [737], [741], [745], [749], [753], [757], [760], [761], [765], [769], [773], [777], [781], [785], [789], [793], [797], [801], [805], [809], [813], [817], [821], [825], [829], [833], [837], [841], [845], [849], [853], [857], [860], [1552], [1556], [1560], [1566], [1570], [1572], [1579], [1580], [1581], [1583], [1584] [2018-11-07 00:33:21,087 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-11-07 00:33:21,088 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 00:33:21,897 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 00:33:35,858 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-07 00:33:35,859 INFO L272 AbstractInterpreter]: Visited 126 different actions 485 times. Merged at 5 different actions 14 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2018-11-07 00:33:35,870 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 00:33:35,870 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-07 00:33:39,328 INFO L227 lantSequenceWeakener]: Weakened 113 states. On average, predicates are now at 77.77% of their original sizes. [2018-11-07 00:33:39,328 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-07 00:35:24,928 INFO L415 sIntCurrentIteration]: We unified 298 AI predicates to 298 [2018-11-07 00:35:24,928 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-07 00:35:24,928 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-07 00:35:24,929 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [22] imperfect sequences [6] total 26 [2018-11-07 00:35:24,929 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 00:35:24,930 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-11-07 00:35:24,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-11-07 00:35:24,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=371, Unknown=0, NotChecked=0, Total=462 [2018-11-07 00:35:24,931 INFO L87 Difference]: Start difference. First operand 8244 states and 12573 transitions. Second operand 22 states. Received shutdown request... [2018-11-07 00:36:09,327 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-11-07 00:36:09,328 WARN L549 AbstractCegarLoop]: Verification canceled [2018-11-07 00:36:09,334 WARN L205 ceAbstractionStarter]: Timeout [2018-11-07 00:36:09,335 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.11 12:36:09 BoogieIcfgContainer [2018-11-07 00:36:09,335 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-07 00:36:09,336 INFO L168 Benchmark]: Toolchain (without parser) took 241763.65 ms. Allocated memory was 1.5 GB in the beginning and 3.3 GB in the end (delta: 1.7 GB). Free memory was 1.4 GB in the beginning and 2.5 GB in the end (delta: -1.1 GB). Peak memory consumption was 681.9 MB. Max. memory is 7.1 GB. [2018-11-07 00:36:09,340 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. [2018-11-07 00:36:09,340 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1135.42 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: 84.6 MB). Peak memory consumption was 84.6 MB. Max. memory is 7.1 GB. [2018-11-07 00:36:09,341 INFO L168 Benchmark]: Boogie Procedure Inliner took 188.70 ms. Allocated memory was 1.5 GB in the beginning and 2.2 GB in the end (delta: 723.5 MB). Free memory was 1.3 GB in the beginning and 2.2 GB in the end (delta: -847.6 MB). Peak memory consumption was 27.1 MB. Max. memory is 7.1 GB. [2018-11-07 00:36:09,342 INFO L168 Benchmark]: Boogie Preprocessor took 161.84 ms. Allocated memory is still 2.2 GB. Free memory is still 2.2 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-11-07 00:36:09,343 INFO L168 Benchmark]: RCFGBuilder took 5942.83 ms. Allocated memory is still 2.2 GB. Free memory was 2.2 GB in the beginning and 1.9 GB in the end (delta: 260.1 MB). Peak memory consumption was 260.1 MB. Max. memory is 7.1 GB. [2018-11-07 00:36:09,343 INFO L168 Benchmark]: TraceAbstraction took 234329.55 ms. Allocated memory was 2.2 GB in the beginning and 3.3 GB in the end (delta: 1.0 GB). Free memory was 1.9 GB in the beginning and 2.5 GB in the end (delta: -562.0 MB). Peak memory consumption was 461.4 MB. Max. memory is 7.1 GB. [2018-11-07 00:36:09,348 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 1135.42 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: 84.6 MB). Peak memory consumption was 84.6 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 188.70 ms. Allocated memory was 1.5 GB in the beginning and 2.2 GB in the end (delta: 723.5 MB). Free memory was 1.3 GB in the beginning and 2.2 GB in the end (delta: -847.6 MB). Peak memory consumption was 27.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 161.84 ms. Allocated memory is still 2.2 GB. Free memory is still 2.2 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 5942.83 ms. Allocated memory is still 2.2 GB. Free memory was 2.2 GB in the beginning and 1.9 GB in the end (delta: 260.1 MB). Peak memory consumption was 260.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 234329.55 ms. Allocated memory was 2.2 GB in the beginning and 3.3 GB in the end (delta: 1.0 GB). Free memory was 1.9 GB in the beginning and 2.5 GB in the end (delta: -562.0 MB). Peak memory consumption was 461.4 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 37]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 37). Cancelled while BasicCegarLoop was constructing difference of abstraction (8244states) and FLOYD_HOARE automaton (currently 15 states, 22 states before enhancement),while ReachableStatesComputation was computing reachable states (112 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 410 locations, 1 error locations. TIMEOUT Result, 234.2s OverallTime, 6 OverallIterations, 4 TraceHistogramMax, 101.5s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 882 SDtfs, 8110 SDslu, 608 SDs, 0 SdLazy, 9954 SolverSat, 3501 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 42.6s Time, PredicateUnifierStatistics: 4 DeclaredPredicates, 549 GetRequests, 318 SyntacticMatches, 174 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 931 ImplicationChecksByTransitivity, 109.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=8244occurred in iteration=5, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 17.7s AbstIntTime, 2 AbstIntIterations, 2 AbstIntStrong, 0.9951511099608924 AbsIntWeakeningRatio, 0.11507936507936507 AbsIntAvgWeakeningVarsNumRemoved, 382.32936507936506 AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.9s AutomataMinimizationTime, 5 MinimizatonAttempts, 109 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 2.1s InterpolantComputationTime, 908 NumberOfCodeBlocks, 908 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 902 ConstructedInterpolants, 0 QuantifiedInterpolants, 769601 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 6 InterpolantComputations, 4 PerfectInterpolantSequences, 165/391 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown