java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UTaipan-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/Problem12_label29_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-1dbac8b [2018-10-27 02:45:32,560 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-27 02:45:32,564 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-27 02:45:32,582 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-27 02:45:32,583 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-27 02:45:32,585 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-27 02:45:32,587 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-27 02:45:32,590 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-27 02:45:32,592 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-27 02:45:32,592 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-27 02:45:32,593 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-27 02:45:32,594 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-27 02:45:32,596 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-27 02:45:32,597 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-27 02:45:32,599 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-27 02:45:32,600 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-27 02:45:32,603 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-27 02:45:32,610 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-27 02:45:32,615 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-27 02:45:32,617 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-27 02:45:32,618 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-27 02:45:32,622 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-27 02:45:32,625 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-10-27 02:45:32,640 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-10-27 02:45:32,640 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-10-27 02:45:32,641 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-10-27 02:45:32,642 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-10-27 02:45:32,642 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default.epf [2018-10-27 02:45:32,673 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-27 02:45:32,673 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-27 02:45:32,675 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-27 02:45:32,675 INFO L133 SettingsManager]: * User list type=DISABLED [2018-10-27 02:45:32,675 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-10-27 02:45:32,675 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-10-27 02:45:32,676 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-10-27 02:45:32,676 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-10-27 02:45:32,676 INFO L133 SettingsManager]: * Log string format=TERM [2018-10-27 02:45:32,676 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-10-27 02:45:32,676 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-10-27 02:45:32,677 INFO L133 SettingsManager]: * Interval Domain=false [2018-10-27 02:45:32,678 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-27 02:45:32,678 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-27 02:45:32,678 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-27 02:45:32,679 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-27 02:45:32,680 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-27 02:45:32,681 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-27 02:45:32,681 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-27 02:45:32,681 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-27 02:45:32,681 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-27 02:45:32,682 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-27 02:45:32,682 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-27 02:45:32,682 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-27 02:45:32,682 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-27 02:45:32,683 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-27 02:45:32,683 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-27 02:45:32,683 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-27 02:45:32,683 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-10-27 02:45:32,683 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-27 02:45:32,684 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-27 02:45:32,684 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-27 02:45:32,684 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-27 02:45:32,684 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-10-27 02:45:32,747 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-27 02:45:32,763 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-27 02:45:32,767 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-27 02:45:32,769 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-27 02:45:32,769 INFO L276 PluginConnector]: CDTParser initialized [2018-10-27 02:45:32,770 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem12_label29_true-unreach-call.c [2018-10-27 02:45:32,831 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/cf578ee5e/d2342e1bfc8446b5abcd82a0885add51/FLAG699028bb8 [2018-10-27 02:45:33,594 INFO L298 CDTParser]: Found 1 translation units. [2018-10-27 02:45:33,595 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem12_label29_true-unreach-call.c [2018-10-27 02:45:33,629 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/cf578ee5e/d2342e1bfc8446b5abcd82a0885add51/FLAG699028bb8 [2018-10-27 02:45:33,645 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/cf578ee5e/d2342e1bfc8446b5abcd82a0885add51 [2018-10-27 02:45:33,658 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-27 02:45:33,661 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-27 02:45:33,664 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-27 02:45:33,665 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-27 02:45:33,670 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-27 02:45:33,671 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 02:45:33" (1/1) ... [2018-10-27 02:45:33,674 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@769766bd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:45:33, skipping insertion in model container [2018-10-27 02:45:33,674 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 02:45:33" (1/1) ... [2018-10-27 02:45:33,686 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-27 02:45:33,870 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-27 02:45:35,340 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-27 02:45:35,347 INFO L189 MainTranslator]: Completed pre-run [2018-10-27 02:45:36,004 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-27 02:45:36,041 INFO L193 MainTranslator]: Completed translation [2018-10-27 02:45:36,042 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:45:36 WrapperNode [2018-10-27 02:45:36,042 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-27 02:45:36,043 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-27 02:45:36,044 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-27 02:45:36,044 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-27 02:45:36,057 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:45:36" (1/1) ... [2018-10-27 02:45:36,133 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:45:36" (1/1) ... [2018-10-27 02:45:36,598 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-27 02:45:36,599 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-27 02:45:36,599 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-27 02:45:36,599 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-27 02:45:36,611 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:45:36" (1/1) ... [2018-10-27 02:45:36,612 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:45:36" (1/1) ... [2018-10-27 02:45:36,642 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:45:36" (1/1) ... [2018-10-27 02:45:36,643 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:45:36" (1/1) ... [2018-10-27 02:45:36,771 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:45:36" (1/1) ... [2018-10-27 02:45:36,813 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:45:36" (1/1) ... [2018-10-27 02:45:36,875 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:45:36" (1/1) ... [2018-10-27 02:45:36,935 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-27 02:45:36,935 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-27 02:45:36,936 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-27 02:45:36,936 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-27 02:45:36,937 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:45:36" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-27 02:45:37,015 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-10-27 02:45:37,015 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-10-27 02:45:37,015 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2018-10-27 02:45:37,016 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2018-10-27 02:45:37,016 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2018-10-27 02:45:37,016 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2018-10-27 02:45:37,016 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2018-10-27 02:45:37,016 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2018-10-27 02:45:37,017 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-10-27 02:45:37,017 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-10-27 02:45:37,017 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-27 02:45:37,017 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-27 02:45:37,017 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-10-27 02:45:37,019 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-10-27 02:45:49,126 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-27 02:45:49,127 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 02:45:49 BoogieIcfgContainer [2018-10-27 02:45:49,127 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-27 02:45:49,128 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-27 02:45:49,128 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-27 02:45:49,132 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-27 02:45:49,132 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 02:45:33" (1/3) ... [2018-10-27 02:45:49,133 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@189aabe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 02:45:49, skipping insertion in model container [2018-10-27 02:45:49,133 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:45:36" (2/3) ... [2018-10-27 02:45:49,133 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@189aabe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 02:45:49, skipping insertion in model container [2018-10-27 02:45:49,133 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 02:45:49" (3/3) ... [2018-10-27 02:45:49,135 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem12_label29_true-unreach-call.c [2018-10-27 02:45:49,146 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-27 02:45:49,156 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-27 02:45:49,174 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-27 02:45:49,219 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-27 02:45:49,219 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-27 02:45:49,219 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-27 02:45:49,219 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-27 02:45:49,219 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-27 02:45:49,219 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-27 02:45:49,220 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-27 02:45:49,220 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-27 02:45:49,258 INFO L276 IsEmpty]: Start isEmpty. Operand 840 states. [2018-10-27 02:45:49,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-10-27 02:45:49,275 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 02:45:49,277 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 02:45:49,280 INFO L424 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 02:45:49,287 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 02:45:49,288 INFO L82 PathProgramCache]: Analyzing trace with hash -648066108, now seen corresponding path program 1 times [2018-10-27 02:45:49,290 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 02:45:49,350 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 02:45:49,351 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 02:45:49,351 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 02:45:49,351 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 02:45:49,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 02:45:49,864 WARN L179 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 8 DAG size of output: 3 [2018-10-27 02:45:49,934 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 02:45:49,940 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 02:45:49,940 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-27 02:45:49,940 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 02:45:49,951 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-27 02:45:49,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-27 02:45:49,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-27 02:45:49,971 INFO L87 Difference]: Start difference. First operand 840 states. Second operand 4 states. [2018-10-27 02:46:02,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 02:46:02,458 INFO L93 Difference]: Finished difference Result 3234 states and 6255 transitions. [2018-10-27 02:46:02,460 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-27 02:46:02,461 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 62 [2018-10-27 02:46:02,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 02:46:02,503 INFO L225 Difference]: With dead ends: 3234 [2018-10-27 02:46:02,503 INFO L226 Difference]: Without dead ends: 2388 [2018-10-27 02:46:02,516 INFO L605 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 [2018-10-27 02:46:02,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2388 states. [2018-10-27 02:46:02,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2388 to 2388. [2018-10-27 02:46:02,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2388 states. [2018-10-27 02:46:02,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2388 states to 2388 states and 3845 transitions. [2018-10-27 02:46:02,689 INFO L78 Accepts]: Start accepts. Automaton has 2388 states and 3845 transitions. Word has length 62 [2018-10-27 02:46:02,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 02:46:02,689 INFO L481 AbstractCegarLoop]: Abstraction has 2388 states and 3845 transitions. [2018-10-27 02:46:02,690 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-27 02:46:02,690 INFO L276 IsEmpty]: Start isEmpty. Operand 2388 states and 3845 transitions. [2018-10-27 02:46:02,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2018-10-27 02:46:02,699 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 02:46:02,700 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, 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] [2018-10-27 02:46:02,700 INFO L424 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 02:46:02,700 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 02:46:02,701 INFO L82 PathProgramCache]: Analyzing trace with hash -267235377, now seen corresponding path program 1 times [2018-10-27 02:46:02,701 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 02:46:02,702 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 02:46:02,702 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 02:46:02,702 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 02:46:02,702 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 02:46:02,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 02:46:02,965 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 02:46:02,966 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 02:46:02,966 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-10-27 02:46:02,966 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 02:46:02,968 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-27 02:46:02,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-27 02:46:02,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2018-10-27 02:46:02,969 INFO L87 Difference]: Start difference. First operand 2388 states and 3845 transitions. Second operand 5 states. [2018-10-27 02:46:17,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 02:46:17,357 INFO L93 Difference]: Finished difference Result 7257 states and 11779 transitions. [2018-10-27 02:46:17,361 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-27 02:46:17,361 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 143 [2018-10-27 02:46:17,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 02:46:17,393 INFO L225 Difference]: With dead ends: 7257 [2018-10-27 02:46:17,393 INFO L226 Difference]: Without dead ends: 4875 [2018-10-27 02:46:17,402 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-10-27 02:46:17,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4875 states. [2018-10-27 02:46:17,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4875 to 4829. [2018-10-27 02:46:17,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4829 states. [2018-10-27 02:46:17,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4829 states to 4829 states and 7152 transitions. [2018-10-27 02:46:17,541 INFO L78 Accepts]: Start accepts. Automaton has 4829 states and 7152 transitions. Word has length 143 [2018-10-27 02:46:17,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 02:46:17,542 INFO L481 AbstractCegarLoop]: Abstraction has 4829 states and 7152 transitions. [2018-10-27 02:46:17,542 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-27 02:46:17,543 INFO L276 IsEmpty]: Start isEmpty. Operand 4829 states and 7152 transitions. [2018-10-27 02:46:17,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2018-10-27 02:46:17,548 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 02:46:17,548 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 02:46:17,548 INFO L424 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 02:46:17,549 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 02:46:17,549 INFO L82 PathProgramCache]: Analyzing trace with hash 1673617562, now seen corresponding path program 1 times [2018-10-27 02:46:17,549 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 02:46:17,550 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 02:46:17,550 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 02:46:17,551 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 02:46:17,551 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 02:46:17,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 02:46:17,898 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 02:46:17,899 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 02:46:17,899 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-10-27 02:46:17,899 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 02:46:17,900 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-27 02:46:17,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-27 02:46:17,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-10-27 02:46:17,900 INFO L87 Difference]: Start difference. First operand 4829 states and 7152 transitions. Second operand 6 states. [2018-10-27 02:46:25,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 02:46:25,707 INFO L93 Difference]: Finished difference Result 14640 states and 22370 transitions. [2018-10-27 02:46:25,714 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-27 02:46:25,714 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 176 [2018-10-27 02:46:25,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 02:46:25,772 INFO L225 Difference]: With dead ends: 14640 [2018-10-27 02:46:25,773 INFO L226 Difference]: Without dead ends: 9817 [2018-10-27 02:46:25,789 INFO L605 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 [2018-10-27 02:46:25,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9817 states. [2018-10-27 02:46:26,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9817 to 9687. [2018-10-27 02:46:26,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9687 states. [2018-10-27 02:46:26,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9687 states to 9687 states and 14172 transitions. [2018-10-27 02:46:26,059 INFO L78 Accepts]: Start accepts. Automaton has 9687 states and 14172 transitions. Word has length 176 [2018-10-27 02:46:26,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 02:46:26,059 INFO L481 AbstractCegarLoop]: Abstraction has 9687 states and 14172 transitions. [2018-10-27 02:46:26,060 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-27 02:46:26,062 INFO L276 IsEmpty]: Start isEmpty. Operand 9687 states and 14172 transitions. [2018-10-27 02:46:26,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2018-10-27 02:46:26,069 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 02:46:26,069 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 02:46:26,070 INFO L424 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 02:46:26,070 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 02:46:26,070 INFO L82 PathProgramCache]: Analyzing trace with hash 924991159, now seen corresponding path program 1 times [2018-10-27 02:46:26,070 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 02:46:26,072 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 02:46:26,072 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 02:46:26,072 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 02:46:26,072 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 02:46:26,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 02:46:26,406 WARN L179 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-10-27 02:46:26,677 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 02:46:26,677 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 02:46:26,678 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-10-27 02:46:26,678 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 02:46:26,678 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-27 02:46:26,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-27 02:46:26,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-10-27 02:46:26,679 INFO L87 Difference]: Start difference. First operand 9687 states and 14172 transitions. Second operand 6 states. [2018-10-27 02:46:38,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 02:46:38,215 INFO L93 Difference]: Finished difference Result 33017 states and 50581 transitions. [2018-10-27 02:46:38,217 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-27 02:46:38,217 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 187 [2018-10-27 02:46:38,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 02:46:38,331 INFO L225 Difference]: With dead ends: 33017 [2018-10-27 02:46:38,332 INFO L226 Difference]: Without dead ends: 23336 [2018-10-27 02:46:38,386 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-10-27 02:46:38,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23336 states. [2018-10-27 02:46:38,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23336 to 23223. [2018-10-27 02:46:38,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23223 states. [2018-10-27 02:46:38,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23223 states to 23223 states and 32833 transitions. [2018-10-27 02:46:38,930 INFO L78 Accepts]: Start accepts. Automaton has 23223 states and 32833 transitions. Word has length 187 [2018-10-27 02:46:38,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 02:46:38,931 INFO L481 AbstractCegarLoop]: Abstraction has 23223 states and 32833 transitions. [2018-10-27 02:46:38,931 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-27 02:46:38,931 INFO L276 IsEmpty]: Start isEmpty. Operand 23223 states and 32833 transitions. [2018-10-27 02:46:38,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2018-10-27 02:46:38,936 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 02:46:38,936 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 02:46:38,936 INFO L424 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 02:46:38,937 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 02:46:38,937 INFO L82 PathProgramCache]: Analyzing trace with hash 862970119, now seen corresponding path program 1 times [2018-10-27 02:46:38,937 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 02:46:38,938 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 02:46:38,938 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 02:46:38,938 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 02:46:38,938 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 02:46:38,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 02:46:39,198 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 02:46:39,199 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 02:46:39,199 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-27 02:46:39,199 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 02:46:39,200 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-27 02:46:39,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-27 02:46:39,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-27 02:46:39,201 INFO L87 Difference]: Start difference. First operand 23223 states and 32833 transitions. Second operand 4 states. [2018-10-27 02:46:48,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 02:46:48,320 INFO L93 Difference]: Finished difference Result 55863 states and 80527 transitions. [2018-10-27 02:46:48,320 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-27 02:46:48,321 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 211 [2018-10-27 02:46:48,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 02:46:48,454 INFO L225 Difference]: With dead ends: 55863 [2018-10-27 02:46:48,454 INFO L226 Difference]: Without dead ends: 32646 [2018-10-27 02:46:48,549 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-27 02:46:48,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32646 states. [2018-10-27 02:46:49,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32646 to 32644. [2018-10-27 02:46:49,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32644 states. [2018-10-27 02:46:49,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32644 states to 32644 states and 42114 transitions. [2018-10-27 02:46:49,273 INFO L78 Accepts]: Start accepts. Automaton has 32644 states and 42114 transitions. Word has length 211 [2018-10-27 02:46:49,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 02:46:49,274 INFO L481 AbstractCegarLoop]: Abstraction has 32644 states and 42114 transitions. [2018-10-27 02:46:49,275 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-27 02:46:49,275 INFO L276 IsEmpty]: Start isEmpty. Operand 32644 states and 42114 transitions. [2018-10-27 02:46:49,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2018-10-27 02:46:49,281 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 02:46:49,281 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 02:46:49,281 INFO L424 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 02:46:49,281 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 02:46:49,282 INFO L82 PathProgramCache]: Analyzing trace with hash 1084674450, now seen corresponding path program 1 times [2018-10-27 02:46:49,282 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 02:46:49,283 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 02:46:49,283 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 02:46:49,283 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 02:46:49,284 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 02:46:49,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 02:46:49,623 WARN L179 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-10-27 02:46:49,895 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-10-27 02:46:49,895 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 02:46:49,895 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 02:46:49,896 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 213 with the following transitions: [2018-10-27 02:46:49,899 INFO L202 CegarAbsIntRunner]: [0], [1], [1868], [1875], [1883], [1891], [1899], [1907], [1915], [1923], [1931], [1939], [1947], [1955], [1963], [1971], [1979], [1987], [1995], [2003], [2011], [2019], [2027], [2035], [2043], [2051], [2059], [2067], [2075], [2083], [2091], [2099], [2107], [2115], [2123], [2131], [2139], [2147], [2155], [2163], [2171], [2179], [2187], [2195], [2203], [2211], [2219], [2227], [2235], [2243], [2251], [2259], [2263], [2265], [2268], [2276], [2284], [2292], [2300], [2308], [2316], [2324], [2332], [2340], [2348], [2356], [2361], [2365], [2369], [2373], [2377], [2381], [2385], [2389], [2393], [2397], [2401], [2405], [2409], [2413], [2417], [2421], [2425], [2429], [2433], [2437], [2441], [2445], [2449], [2453], [2457], [2461], [2465], [2469], [2473], [2477], [2481], [2485], [2489], [2493], [2497], [2501], [2505], [2509], [2513], [2517], [2521], [2525], [2529], [2533], [2537], [2541], [2545], [2549], [2553], [2557], [2561], [2565], [2569], [2573], [2577], [2581], [2585], [2589], [2593], [2597], [2601], [2605], [2609], [2613], [2617], [2621], [2625], [2629], [2633], [2637], [2641], [2645], [2649], [2653], [2657], [2661], [2665], [2669], [2673], [2677], [2680], [3240], [3244], [3248], [3254], [3258], [3260], [3271], [3272], [3273], [3275], [3276] [2018-10-27 02:46:50,019 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-10-27 02:46:50,019 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 02:46:56,084 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-10-27 02:47:16,825 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-10-27 02:47:16,827 INFO L272 AbstractInterpreter]: Visited 157 different actions 459 times. Merged at 5 different actions 10 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 26 variables. [2018-10-27 02:47:16,864 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 02:47:16,864 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-10-27 02:47:20,578 INFO L227 lantSequenceWeakener]: Weakened 12 states. On average, predicates are now at 80.9% of their original sizes. [2018-10-27 02:47:20,579 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-10-27 02:47:49,029 INFO L415 sIntCurrentIteration]: We unified 211 AI predicates to 211 [2018-10-27 02:47:49,030 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-10-27 02:47:49,030 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-27 02:47:49,031 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [20] imperfect sequences [4] total 22 [2018-10-27 02:47:49,031 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 02:47:49,032 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-10-27 02:47:49,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-10-27 02:47:49,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2018-10-27 02:47:49,032 INFO L87 Difference]: Start difference. First operand 32644 states and 42114 transitions. Second operand 20 states. Received shutdown request... [2018-10-27 02:49:38,512 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-27 02:49:38,512 WARN L550 AbstractCegarLoop]: Verification canceled [2018-10-27 02:49:38,517 WARN L205 ceAbstractionStarter]: Timeout [2018-10-27 02:49:38,517 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.10 02:49:38 BoogieIcfgContainer [2018-10-27 02:49:38,518 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-27 02:49:38,519 INFO L168 Benchmark]: Toolchain (without parser) took 244858.98 ms. Allocated memory was 1.5 GB in the beginning and 4.2 GB in the end (delta: 2.7 GB). Free memory was 1.4 GB in the beginning and 3.0 GB in the end (delta: -1.6 GB). Peak memory consumption was 1.1 GB. Max. memory is 7.1 GB. [2018-10-27 02:49:38,520 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-27 02:49:38,521 INFO L168 Benchmark]: CACSL2BoogieTranslator took 2378.40 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.2 GB in the end (delta: 200.8 MB). Peak memory consumption was 200.8 MB. Max. memory is 7.1 GB. [2018-10-27 02:49:38,522 INFO L168 Benchmark]: Boogie Procedure Inliner took 555.46 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 791.7 MB). Free memory was 1.2 GB in the beginning and 2.2 GB in the end (delta: -1.0 GB). Peak memory consumption was 58.3 MB. Max. memory is 7.1 GB. [2018-10-27 02:49:38,523 INFO L168 Benchmark]: Boogie Preprocessor took 335.83 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: 43.7 MB). Peak memory consumption was 43.7 MB. Max. memory is 7.1 GB. [2018-10-27 02:49:38,525 INFO L168 Benchmark]: RCFGBuilder took 12191.80 ms. Allocated memory was 2.3 GB in the beginning and 2.5 GB in the end (delta: 187.7 MB). Free memory was 2.2 GB in the beginning and 2.4 GB in the end (delta: -199.8 MB). Peak memory consumption was 670.5 MB. Max. memory is 7.1 GB. [2018-10-27 02:49:38,527 INFO L168 Benchmark]: TraceAbstraction took 229389.57 ms. Allocated memory was 2.5 GB in the beginning and 4.2 GB in the end (delta: 1.7 GB). Free memory was 2.4 GB in the beginning and 3.0 GB in the end (delta: -624.2 MB). Peak memory consumption was 1.1 GB. Max. memory is 7.1 GB. [2018-10-27 02:49:38,536 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 2378.40 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.2 GB in the end (delta: 200.8 MB). Peak memory consumption was 200.8 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 555.46 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 791.7 MB). Free memory was 1.2 GB in the beginning and 2.2 GB in the end (delta: -1.0 GB). Peak memory consumption was 58.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 335.83 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: 43.7 MB). Peak memory consumption was 43.7 MB. Max. memory is 7.1 GB. * RCFGBuilder took 12191.80 ms. Allocated memory was 2.3 GB in the beginning and 2.5 GB in the end (delta: 187.7 MB). Free memory was 2.2 GB in the beginning and 2.4 GB in the end (delta: -199.8 MB). Peak memory consumption was 670.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 229389.57 ms. Allocated memory was 2.5 GB in the beginning and 4.2 GB in the end (delta: 1.7 GB). Free memory was 2.4 GB in the beginning and 3.0 GB in the end (delta: -624.2 MB). Peak memory consumption was 1.1 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 177]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 177). Cancelled while BasicCegarLoop was constructing difference of abstraction (32644states) and FLOYD_HOARE automaton (currently 10 states, 20 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 26 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 7 procedures, 840 locations, 1 error locations. TIMEOUT Result, 229.3s OverallTime, 6 OverallIterations, 2 TraceHistogramMax, 165.4s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 2060 SDtfs, 13778 SDslu, 852 SDs, 0 SdLazy, 26819 SolverSat, 6049 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 79.3s Time, PredicateUnifierStatistics: 2 DeclaredPredicates, 256 GetRequests, 192 SyntacticMatches, 17 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 31.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=32644occurred in iteration=5, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 26.9s AbstIntTime, 1 AbstIntIterations, 1 AbstIntStrong, 0.9957783448778709 AbsIntWeakeningRatio, 0.0995260663507109 AbsIntAvgWeakeningVarsNumRemoved, 547.6208530805687 AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 1.8s AutomataMinimizationTime, 5 MinimizatonAttempts, 291 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 1.9s InterpolantComputationTime, 991 NumberOfCodeBlocks, 991 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 985 ConstructedInterpolants, 0 QuantifiedInterpolants, 579723 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 6 InterpolantComputations, 5 PerfectInterpolantSequences, 224/275 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown