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/loop-invgen/heapsort_true-unreach-call_true-termination.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-8c3fbe1 [2018-10-22 16:06:46,047 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-22 16:06:46,049 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-22 16:06:46,069 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-22 16:06:46,069 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-22 16:06:46,071 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-22 16:06:46,075 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-22 16:06:46,077 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-22 16:06:46,079 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-22 16:06:46,080 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-22 16:06:46,082 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-22 16:06:46,082 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-22 16:06:46,083 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-22 16:06:46,084 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-22 16:06:46,085 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-22 16:06:46,086 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-22 16:06:46,087 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-22 16:06:46,089 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-22 16:06:46,091 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-22 16:06:46,093 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-22 16:06:46,094 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-22 16:06:46,095 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-22 16:06:46,098 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-10-22 16:06:46,099 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-10-22 16:06:46,099 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-10-22 16:06:46,100 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-10-22 16:06:46,101 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-10-22 16:06:46,102 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-10-22 16:06:46,103 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-10-22 16:06:46,104 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-10-22 16:06:46,104 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-10-22 16:06:46,105 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... 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[2018-10-22 16:06:46,107 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 [2018-10-22 16:06:46,124 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-22 16:06:46,124 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-22 16:06:46,125 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-22 16:06:46,125 INFO L133 SettingsManager]: * User list type=DISABLED [2018-10-22 16:06:46,125 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-10-22 16:06:46,125 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-10-22 16:06:46,126 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-10-22 16:06:46,126 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-10-22 16:06:46,126 INFO L133 SettingsManager]: * Log string format=TERM [2018-10-22 16:06:46,126 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-10-22 16:06:46,126 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-10-22 16:06:46,127 INFO L133 SettingsManager]: * Interval Domain=false [2018-10-22 16:06:46,127 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-22 16:06:46,128 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-22 16:06:46,128 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-22 16:06:46,128 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-22 16:06:46,128 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-22 16:06:46,128 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-22 16:06:46,129 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-22 16:06:46,129 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-22 16:06:46,129 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-22 16:06:46,129 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-22 16:06:46,129 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-22 16:06:46,130 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-22 16:06:46,130 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-22 16:06:46,130 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-22 16:06:46,130 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-22 16:06:46,130 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-22 16:06:46,131 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-10-22 16:06:46,131 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-22 16:06:46,131 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-22 16:06:46,131 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-22 16:06:46,131 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-22 16:06:46,131 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-10-22 16:06:46,193 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-22 16:06:46,206 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-22 16:06:46,211 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-22 16:06:46,212 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-22 16:06:46,213 INFO L276 PluginConnector]: CDTParser initialized [2018-10-22 16:06:46,214 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/loop-invgen/heapsort_true-unreach-call_true-termination.i [2018-10-22 16:06:46,278 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/1209690df/ac6597f9357249e7bf988bb2f830b4af/FLAG1dfeae623 [2018-10-22 16:06:46,726 INFO L298 CDTParser]: Found 1 translation units. [2018-10-22 16:06:46,727 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/heapsort_true-unreach-call_true-termination.i [2018-10-22 16:06:46,734 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/1209690df/ac6597f9357249e7bf988bb2f830b4af/FLAG1dfeae623 [2018-10-22 16:06:46,755 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/1209690df/ac6597f9357249e7bf988bb2f830b4af [2018-10-22 16:06:46,767 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-22 16:06:46,769 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-22 16:06:46,770 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-22 16:06:46,770 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-22 16:06:46,774 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-22 16:06:46,775 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 04:06:46" (1/1) ... [2018-10-22 16:06:46,779 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@757020ab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 04:06:46, skipping insertion in model container [2018-10-22 16:06:46,779 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 04:06:46" (1/1) ... [2018-10-22 16:06:46,790 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-22 16:06:46,822 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-22 16:06:47,062 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-22 16:06:47,066 INFO L189 MainTranslator]: Completed pre-run [2018-10-22 16:06:47,092 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-22 16:06:47,109 INFO L193 MainTranslator]: Completed translation [2018-10-22 16:06:47,109 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 04:06:47 WrapperNode [2018-10-22 16:06:47,110 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-22 16:06:47,111 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-22 16:06:47,111 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-22 16:06:47,111 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-22 16:06:47,122 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 04:06:47" (1/1) ... [2018-10-22 16:06:47,130 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 04:06:47" (1/1) ... [2018-10-22 16:06:47,137 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-22 16:06:47,138 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-22 16:06:47,138 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-22 16:06:47,138 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-22 16:06:47,149 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 04:06:47" (1/1) ... [2018-10-22 16:06:47,150 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 04:06:47" (1/1) ... [2018-10-22 16:06:47,151 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 04:06:47" (1/1) ... [2018-10-22 16:06:47,151 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 04:06:47" (1/1) ... [2018-10-22 16:06:47,157 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 04:06:47" (1/1) ... [2018-10-22 16:06:47,165 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 04:06:47" (1/1) ... [2018-10-22 16:06:47,170 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 04:06:47" (1/1) ... [2018-10-22 16:06:47,176 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-22 16:06:47,176 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-22 16:06:47,177 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-22 16:06:47,177 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-22 16:06:47,178 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 04:06:47" (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 [2018-10-22 16:06:47,360 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-10-22 16:06:47,360 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-10-22 16:06:47,360 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-22 16:06:47,360 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-22 16:06:47,361 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-10-22 16:06:47,361 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-10-22 16:06:47,361 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2018-10-22 16:06:47,361 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2018-10-22 16:06:47,941 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-22 16:06:47,942 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 04:06:47 BoogieIcfgContainer [2018-10-22 16:06:47,943 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-22 16:06:47,944 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-22 16:06:47,944 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-22 16:06:47,948 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-22 16:06:47,949 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.10 04:06:46" (1/3) ... [2018-10-22 16:06:47,950 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1532be59 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 04:06:47, skipping insertion in model container [2018-10-22 16:06:47,950 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 04:06:47" (2/3) ... [2018-10-22 16:06:47,950 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1532be59 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 04:06:47, skipping insertion in model container [2018-10-22 16:06:47,951 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 04:06:47" (3/3) ... [2018-10-22 16:06:47,953 INFO L112 eAbstractionObserver]: Analyzing ICFG heapsort_true-unreach-call_true-termination.i [2018-10-22 16:06:47,963 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-22 16:06:47,972 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-22 16:06:47,991 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-22 16:06:48,029 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-10-22 16:06:48,030 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-22 16:06:48,030 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-22 16:06:48,030 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-22 16:06:48,030 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-22 16:06:48,031 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-22 16:06:48,031 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-22 16:06:48,031 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-22 16:06:48,031 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-22 16:06:48,054 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states. [2018-10-22 16:06:48,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-22 16:06:48,061 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 16:06:48,063 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 16:06:48,065 INFO L424 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 16:06:48,072 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 16:06:48,072 INFO L82 PathProgramCache]: Analyzing trace with hash 64061581, now seen corresponding path program 1 times [2018-10-22 16:06:48,074 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 16:06:48,125 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 16:06:48,126 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 16:06:48,126 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 16:06:48,126 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 16:06:48,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 16:06:48,225 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 16:06:48,227 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-22 16:06:48,228 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-22 16:06:48,229 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-22 16:06:48,235 INFO L460 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-10-22 16:06:48,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-10-22 16:06:48,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-10-22 16:06:48,255 INFO L87 Difference]: Start difference. First operand 45 states. Second operand 2 states. [2018-10-22 16:06:48,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 16:06:48,287 INFO L93 Difference]: Finished difference Result 83 states and 141 transitions. [2018-10-22 16:06:48,287 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-10-22 16:06:48,289 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 15 [2018-10-22 16:06:48,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 16:06:48,301 INFO L225 Difference]: With dead ends: 83 [2018-10-22 16:06:48,301 INFO L226 Difference]: Without dead ends: 40 [2018-10-22 16:06:48,306 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-10-22 16:06:48,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2018-10-22 16:06:48,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2018-10-22 16:06:48,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2018-10-22 16:06:48,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 59 transitions. [2018-10-22 16:06:48,358 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 59 transitions. Word has length 15 [2018-10-22 16:06:48,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 16:06:48,359 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 59 transitions. [2018-10-22 16:06:48,359 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-10-22 16:06:48,359 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 59 transitions. [2018-10-22 16:06:48,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-10-22 16:06:48,360 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 16:06:48,361 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 16:06:48,361 INFO L424 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 16:06:48,361 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 16:06:48,362 INFO L82 PathProgramCache]: Analyzing trace with hash 1525893932, now seen corresponding path program 1 times [2018-10-22 16:06:48,362 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 16:06:48,363 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 16:06:48,363 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 16:06:48,363 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 16:06:48,364 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 16:06:48,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 16:06:48,549 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 16:06:48,550 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-22 16:06:48,550 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-10-22 16:06:48,550 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-22 16:06:48,552 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-22 16:06:48,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-22 16:06:48,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-10-22 16:06:48,553 INFO L87 Difference]: Start difference. First operand 40 states and 59 transitions. Second operand 6 states. [2018-10-22 16:06:49,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 16:06:49,378 INFO L93 Difference]: Finished difference Result 77 states and 114 transitions. [2018-10-22 16:06:49,378 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-22 16:06:49,379 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2018-10-22 16:06:49,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 16:06:49,381 INFO L225 Difference]: With dead ends: 77 [2018-10-22 16:06:49,381 INFO L226 Difference]: Without dead ends: 75 [2018-10-22 16:06:49,382 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2018-10-22 16:06:49,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2018-10-22 16:06:49,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 62. [2018-10-22 16:06:49,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2018-10-22 16:06:49,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 94 transitions. [2018-10-22 16:06:49,405 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 94 transitions. Word has length 16 [2018-10-22 16:06:49,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 16:06:49,405 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 94 transitions. [2018-10-22 16:06:49,405 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-22 16:06:49,406 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 94 transitions. [2018-10-22 16:06:49,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-10-22 16:06:49,406 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 16:06:49,407 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 16:06:49,407 INFO L424 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 16:06:49,407 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 16:06:49,407 INFO L82 PathProgramCache]: Analyzing trace with hash 1513649831, now seen corresponding path program 1 times [2018-10-22 16:06:49,407 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 16:06:49,408 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 16:06:49,409 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 16:06:49,409 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 16:06:49,409 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 16:06:49,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 16:06:49,548 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 16:06:49,548 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-22 16:06:49,548 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-10-22 16:06:49,549 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-22 16:06:49,549 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-22 16:06:49,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-22 16:06:49,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-10-22 16:06:49,550 INFO L87 Difference]: Start difference. First operand 62 states and 94 transitions. Second operand 6 states. [2018-10-22 16:06:50,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 16:06:50,171 INFO L93 Difference]: Finished difference Result 121 states and 184 transitions. [2018-10-22 16:06:50,179 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-22 16:06:50,179 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2018-10-22 16:06:50,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 16:06:50,182 INFO L225 Difference]: With dead ends: 121 [2018-10-22 16:06:50,182 INFO L226 Difference]: Without dead ends: 119 [2018-10-22 16:06:50,186 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2018-10-22 16:06:50,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2018-10-22 16:06:50,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 112. [2018-10-22 16:06:50,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2018-10-22 16:06:50,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 173 transitions. [2018-10-22 16:06:50,242 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 173 transitions. Word has length 16 [2018-10-22 16:06:50,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 16:06:50,242 INFO L481 AbstractCegarLoop]: Abstraction has 112 states and 173 transitions. [2018-10-22 16:06:50,242 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-22 16:06:50,243 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 173 transitions. [2018-10-22 16:06:50,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-22 16:06:50,244 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 16:06:50,244 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 16:06:50,244 INFO L424 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 16:06:50,245 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 16:06:50,245 INFO L82 PathProgramCache]: Analyzing trace with hash -492506935, now seen corresponding path program 1 times [2018-10-22 16:06:50,245 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 16:06:50,246 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 16:06:50,246 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 16:06:50,247 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 16:06:50,247 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 16:06:50,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 16:06:50,395 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 16:06:50,395 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 16:06:50,395 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-22 16:06:50,396 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 22 with the following transitions: [2018-10-22 16:06:50,398 INFO L202 CegarAbsIntRunner]: [0], [4], [8], [11], [17], [23], [27], [33], [49], [84], [87], [89], [92], [94], [95], [96], [97], [107], [108], [109] [2018-10-22 16:06:50,449 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-10-22 16:06:50,450 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-22 16:06:50,615 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-10-22 16:06:50,688 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-10-22 16:06:50,690 INFO L272 AbstractInterpreter]: Visited 19 different actions 23 times. Never merged. Never widened. Never found a fixpoint. Largest state had 13 variables. [2018-10-22 16:06:50,704 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 16:06:50,704 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-10-22 16:06:50,883 INFO L232 lantSequenceWeakener]: Weakened 13 states. On average, predicates are now at 74.43% of their original sizes. [2018-10-22 16:06:50,885 INFO L411 sIntCurrentIteration]: Unifying AI predicates [2018-10-22 16:06:51,171 INFO L422 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-10-22 16:06:51,173 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-22 16:06:51,173 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [10] imperfect sequences [7] total 15 [2018-10-22 16:06:51,173 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-22 16:06:51,174 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-22 16:06:51,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-22 16:06:51,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2018-10-22 16:06:51,175 INFO L87 Difference]: Start difference. First operand 112 states and 173 transitions. Second operand 10 states. [2018-10-22 16:06:55,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 16:06:55,531 INFO L93 Difference]: Finished difference Result 294 states and 467 transitions. [2018-10-22 16:06:55,531 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-10-22 16:06:55,531 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 21 [2018-10-22 16:06:55,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 16:06:55,536 INFO L225 Difference]: With dead ends: 294 [2018-10-22 16:06:55,536 INFO L226 Difference]: Without dead ends: 292 [2018-10-22 16:06:55,537 INFO L605 BasicCegarLoop]: 2 DeclaredPredicates, 28 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2018-10-22 16:06:55,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2018-10-22 16:06:55,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 249. [2018-10-22 16:06:55,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 249 states. [2018-10-22 16:06:55,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 398 transitions. [2018-10-22 16:06:55,621 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 398 transitions. Word has length 21 [2018-10-22 16:06:55,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 16:06:55,622 INFO L481 AbstractCegarLoop]: Abstraction has 249 states and 398 transitions. [2018-10-22 16:06:55,622 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-22 16:06:55,622 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 398 transitions. [2018-10-22 16:06:55,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-22 16:06:55,624 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 16:06:55,624 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 16:06:55,625 INFO L424 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 16:06:55,625 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 16:06:55,625 INFO L82 PathProgramCache]: Analyzing trace with hash -1032051649, now seen corresponding path program 1 times [2018-10-22 16:06:55,625 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 16:06:55,626 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 16:06:55,627 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 16:06:55,627 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 16:06:55,627 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 16:06:55,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 16:06:55,774 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 16:06:55,775 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 16:06:55,775 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-22 16:06:55,775 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 22 with the following transitions: [2018-10-22 16:06:55,775 INFO L202 CegarAbsIntRunner]: [0], [4], [8], [11], [17], [23], [27], [31], [69], [84], [87], [89], [92], [94], [95], [96], [97], [119], [120], [121] [2018-10-22 16:06:55,777 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-10-22 16:06:55,777 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-22 16:06:55,786 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-10-22 16:06:55,800 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-22 16:06:55,801 INFO L272 AbstractInterpreter]: Visited 20 different actions 24 times. Never merged. Never widened. Never found a fixpoint. Largest state had 13 variables. [2018-10-22 16:06:55,804 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 16:06:55,805 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-22 16:06:55,805 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 16:06:55,805 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 16:06:55,815 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 16:06:55,816 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-22 16:06:55,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 16:06:55,837 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 16:06:56,151 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-10-22 16:06:56,152 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 16:06:56,299 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 16:06:56,324 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-10-22 16:06:56,325 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [9] total 15 [2018-10-22 16:06:56,325 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-22 16:06:56,326 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-22 16:06:56,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-22 16:06:56,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2018-10-22 16:06:56,327 INFO L87 Difference]: Start difference. First operand 249 states and 398 transitions. Second operand 5 states. [2018-10-22 16:06:57,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 16:06:57,509 INFO L93 Difference]: Finished difference Result 552 states and 895 transitions. [2018-10-22 16:06:57,509 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-22 16:06:57,510 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 21 [2018-10-22 16:06:57,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 16:06:57,516 INFO L225 Difference]: With dead ends: 552 [2018-10-22 16:06:57,517 INFO L226 Difference]: Without dead ends: 388 [2018-10-22 16:06:57,520 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2018-10-22 16:06:57,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 388 states. [2018-10-22 16:06:57,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 388 to 297. [2018-10-22 16:06:57,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 297 states. [2018-10-22 16:06:57,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 477 transitions. [2018-10-22 16:06:57,654 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 477 transitions. Word has length 21 [2018-10-22 16:06:57,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 16:06:57,655 INFO L481 AbstractCegarLoop]: Abstraction has 297 states and 477 transitions. [2018-10-22 16:06:57,655 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-22 16:06:57,655 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 477 transitions. [2018-10-22 16:06:57,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-22 16:06:57,656 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 16:06:57,657 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 16:06:57,657 INFO L424 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 16:06:57,657 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 16:06:57,657 INFO L82 PathProgramCache]: Analyzing trace with hash -1772370613, now seen corresponding path program 1 times [2018-10-22 16:06:57,658 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 16:06:57,660 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 16:06:57,661 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 16:06:57,662 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 16:06:57,663 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 16:06:57,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 16:06:57,816 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 16:06:57,817 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 16:06:57,817 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-22 16:06:57,817 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 22 with the following transitions: [2018-10-22 16:06:57,818 INFO L202 CegarAbsIntRunner]: [0], [4], [8], [13], [17], [23], [27], [33], [49], [84], [87], [89], [92], [94], [95], [96], [97], [107], [108], [109] [2018-10-22 16:06:57,820 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-10-22 16:06:57,820 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-22 16:06:57,828 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-10-22 16:06:57,842 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-10-22 16:06:57,842 INFO L272 AbstractInterpreter]: Visited 19 different actions 23 times. Never merged. Never widened. Never found a fixpoint. Largest state had 13 variables. [2018-10-22 16:06:57,850 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 16:06:57,850 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-10-22 16:06:57,892 INFO L232 lantSequenceWeakener]: Weakened 13 states. On average, predicates are now at 74.43% of their original sizes. [2018-10-22 16:06:57,893 INFO L411 sIntCurrentIteration]: Unifying AI predicates [2018-10-22 16:06:58,229 INFO L422 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-10-22 16:06:58,230 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-22 16:06:58,230 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [9] imperfect sequences [8] total 15 [2018-10-22 16:06:58,230 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-22 16:06:58,230 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-22 16:06:58,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-22 16:06:58,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2018-10-22 16:06:58,231 INFO L87 Difference]: Start difference. First operand 297 states and 477 transitions. Second operand 9 states. [2018-10-22 16:07:02,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 16:07:02,078 INFO L93 Difference]: Finished difference Result 502 states and 796 transitions. [2018-10-22 16:07:02,078 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-22 16:07:02,078 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 21 [2018-10-22 16:07:02,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 16:07:02,082 INFO L225 Difference]: With dead ends: 502 [2018-10-22 16:07:02,082 INFO L226 Difference]: Without dead ends: 397 [2018-10-22 16:07:02,083 INFO L605 BasicCegarLoop]: 2 DeclaredPredicates, 24 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2018-10-22 16:07:02,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2018-10-22 16:07:02,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 385. [2018-10-22 16:07:02,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 385 states. [2018-10-22 16:07:02,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 611 transitions. [2018-10-22 16:07:02,162 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 611 transitions. Word has length 21 [2018-10-22 16:07:02,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 16:07:02,162 INFO L481 AbstractCegarLoop]: Abstraction has 385 states and 611 transitions. [2018-10-22 16:07:02,162 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-22 16:07:02,162 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 611 transitions. [2018-10-22 16:07:02,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-10-22 16:07:02,164 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 16:07:02,164 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 16:07:02,164 INFO L424 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 16:07:02,164 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 16:07:02,165 INFO L82 PathProgramCache]: Analyzing trace with hash 1278784497, now seen corresponding path program 1 times [2018-10-22 16:07:02,165 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 16:07:02,166 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 16:07:02,166 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 16:07:02,166 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 16:07:02,166 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 16:07:02,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 16:07:02,251 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-10-22 16:07:02,251 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 16:07:02,252 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-22 16:07:02,252 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 29 with the following transitions: [2018-10-22 16:07:02,252 INFO L202 CegarAbsIntRunner]: [0], [4], [8], [11], [17], [23], [27], [33], [49], [53], [58], [84], [87], [89], [92], [94], [95], [96], [97], [107], [108], [109], [110], [111] [2018-10-22 16:07:02,254 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-10-22 16:07:02,255 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-22 16:07:02,260 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-10-22 16:07:02,275 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-10-22 16:07:02,275 INFO L272 AbstractInterpreter]: Visited 23 different actions 31 times. Never merged. Never widened. Never found a fixpoint. Largest state had 14 variables. [2018-10-22 16:07:02,295 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 16:07:02,295 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-10-22 16:07:02,328 INFO L232 lantSequenceWeakener]: Weakened 19 states. On average, predicates are now at 75.64% of their original sizes. [2018-10-22 16:07:02,329 INFO L411 sIntCurrentIteration]: Unifying AI predicates [2018-10-22 16:07:02,559 INFO L422 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-10-22 16:07:02,559 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-22 16:07:02,559 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [12] imperfect sequences [7] total 17 [2018-10-22 16:07:02,560 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-22 16:07:02,560 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-22 16:07:02,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-22 16:07:02,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2018-10-22 16:07:02,561 INFO L87 Difference]: Start difference. First operand 385 states and 611 transitions. Second operand 12 states. [2018-10-22 16:07:07,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 16:07:07,273 INFO L93 Difference]: Finished difference Result 463 states and 731 transitions. [2018-10-22 16:07:07,273 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-10-22 16:07:07,273 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 28 [2018-10-22 16:07:07,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 16:07:07,278 INFO L225 Difference]: With dead ends: 463 [2018-10-22 16:07:07,278 INFO L226 Difference]: Without dead ends: 461 [2018-10-22 16:07:07,279 INFO L605 BasicCegarLoop]: 2 DeclaredPredicates, 41 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=177, Invalid=423, Unknown=0, NotChecked=0, Total=600 [2018-10-22 16:07:07,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 461 states. [2018-10-22 16:07:07,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 461 to 399. [2018-10-22 16:07:07,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 399 states. [2018-10-22 16:07:07,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 399 states to 399 states and 632 transitions. [2018-10-22 16:07:07,384 INFO L78 Accepts]: Start accepts. Automaton has 399 states and 632 transitions. Word has length 28 [2018-10-22 16:07:07,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 16:07:07,385 INFO L481 AbstractCegarLoop]: Abstraction has 399 states and 632 transitions. [2018-10-22 16:07:07,385 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-22 16:07:07,385 INFO L276 IsEmpty]: Start isEmpty. Operand 399 states and 632 transitions. [2018-10-22 16:07:07,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-10-22 16:07:07,386 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 16:07:07,387 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 16:07:07,387 INFO L424 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 16:07:07,387 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 16:07:07,387 INFO L82 PathProgramCache]: Analyzing trace with hash 1497639215, now seen corresponding path program 1 times [2018-10-22 16:07:07,388 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 16:07:07,388 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 16:07:07,389 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 16:07:07,389 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 16:07:07,389 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 16:07:07,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 16:07:07,555 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-10-22 16:07:07,555 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 16:07:07,556 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-22 16:07:07,556 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 29 with the following transitions: [2018-10-22 16:07:07,556 INFO L202 CegarAbsIntRunner]: [0], [4], [8], [13], [17], [23], [27], [33], [49], [53], [58], [84], [87], [89], [92], [94], [95], [96], [97], [107], [108], [109], [110], [111] [2018-10-22 16:07:07,559 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-10-22 16:07:07,559 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-22 16:07:07,564 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-10-22 16:07:07,580 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-22 16:07:07,580 INFO L272 AbstractInterpreter]: Visited 24 different actions 32 times. Never merged. Never widened. Never found a fixpoint. Largest state had 14 variables. [2018-10-22 16:07:07,584 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 16:07:07,584 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-22 16:07:07,584 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 16:07:07,584 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 16:07:07,624 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 16:07:07,625 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-22 16:07:07,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 16:07:07,656 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 16:07:07,757 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-10-22 16:07:07,758 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 16:07:07,785 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-10-22 16:07:07,807 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-10-22 16:07:07,807 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [7] total 11 [2018-10-22 16:07:07,807 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-22 16:07:07,807 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-22 16:07:07,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-22 16:07:07,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2018-10-22 16:07:07,808 INFO L87 Difference]: Start difference. First operand 399 states and 632 transitions. Second operand 6 states. [2018-10-22 16:07:08,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 16:07:08,540 INFO L93 Difference]: Finished difference Result 727 states and 1180 transitions. [2018-10-22 16:07:08,540 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-22 16:07:08,541 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 28 [2018-10-22 16:07:08,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 16:07:08,547 INFO L225 Difference]: With dead ends: 727 [2018-10-22 16:07:08,547 INFO L226 Difference]: Without dead ends: 725 [2018-10-22 16:07:08,548 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2018-10-22 16:07:08,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 725 states. [2018-10-22 16:07:08,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 725 to 628. [2018-10-22 16:07:08,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 628 states. [2018-10-22 16:07:08,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 628 states to 628 states and 1028 transitions. [2018-10-22 16:07:08,689 INFO L78 Accepts]: Start accepts. Automaton has 628 states and 1028 transitions. Word has length 28 [2018-10-22 16:07:08,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 16:07:08,689 INFO L481 AbstractCegarLoop]: Abstraction has 628 states and 1028 transitions. [2018-10-22 16:07:08,689 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-22 16:07:08,689 INFO L276 IsEmpty]: Start isEmpty. Operand 628 states and 1028 transitions. [2018-10-22 16:07:08,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-10-22 16:07:08,692 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 16:07:08,693 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 16:07:08,693 INFO L424 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 16:07:08,693 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 16:07:08,693 INFO L82 PathProgramCache]: Analyzing trace with hash -249410930, now seen corresponding path program 1 times [2018-10-22 16:07:08,693 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 16:07:08,694 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 16:07:08,694 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 16:07:08,694 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 16:07:08,695 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 16:07:08,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 16:07:08,811 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-10-22 16:07:08,811 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 16:07:08,812 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-22 16:07:08,812 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 32 with the following transitions: [2018-10-22 16:07:08,812 INFO L202 CegarAbsIntRunner]: [0], [4], [8], [11], [17], [23], [27], [33], [36], [84], [87], [89], [92], [94], [95], [96], [97], [99], [100], [101], [102], [103], [104], [105] [2018-10-22 16:07:08,814 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-10-22 16:07:08,814 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-22 16:07:08,819 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-10-22 16:07:08,831 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-10-22 16:07:08,831 INFO L272 AbstractInterpreter]: Visited 23 different actions 35 times. Never merged. Never widened. Never found a fixpoint. Largest state had 13 variables. [2018-10-22 16:07:08,868 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 16:07:08,868 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-10-22 16:07:08,901 INFO L232 lantSequenceWeakener]: Weakened 21 states. On average, predicates are now at 77.67% of their original sizes. [2018-10-22 16:07:08,902 INFO L411 sIntCurrentIteration]: Unifying AI predicates [2018-10-22 16:07:09,224 INFO L422 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-10-22 16:07:09,225 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-22 16:07:09,225 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [10] imperfect sequences [7] total 15 [2018-10-22 16:07:09,225 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-22 16:07:09,225 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-22 16:07:09,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-22 16:07:09,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2018-10-22 16:07:09,226 INFO L87 Difference]: Start difference. First operand 628 states and 1028 transitions. Second operand 10 states. [2018-10-22 16:07:13,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 16:07:13,746 INFO L93 Difference]: Finished difference Result 672 states and 1091 transitions. [2018-10-22 16:07:13,746 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-10-22 16:07:13,746 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 31 [2018-10-22 16:07:13,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 16:07:13,751 INFO L225 Difference]: With dead ends: 672 [2018-10-22 16:07:13,752 INFO L226 Difference]: Without dead ends: 670 [2018-10-22 16:07:13,753 INFO L605 BasicCegarLoop]: 2 DeclaredPredicates, 38 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2018-10-22 16:07:13,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 670 states. [2018-10-22 16:07:13,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 670 to 632. [2018-10-22 16:07:13,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 632 states. [2018-10-22 16:07:13,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 632 states to 632 states and 1031 transitions. [2018-10-22 16:07:13,889 INFO L78 Accepts]: Start accepts. Automaton has 632 states and 1031 transitions. Word has length 31 [2018-10-22 16:07:13,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 16:07:13,890 INFO L481 AbstractCegarLoop]: Abstraction has 632 states and 1031 transitions. [2018-10-22 16:07:13,890 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-22 16:07:13,890 INFO L276 IsEmpty]: Start isEmpty. Operand 632 states and 1031 transitions. [2018-10-22 16:07:13,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-10-22 16:07:13,891 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 16:07:13,892 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 16:07:13,892 INFO L424 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 16:07:13,892 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 16:07:13,892 INFO L82 PathProgramCache]: Analyzing trace with hash -1125815644, now seen corresponding path program 1 times [2018-10-22 16:07:13,892 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 16:07:13,893 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 16:07:13,893 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 16:07:13,893 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 16:07:13,893 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 16:07:13,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 16:07:14,529 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-10-22 16:07:14,529 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 16:07:14,529 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-22 16:07:14,529 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 34 with the following transitions: [2018-10-22 16:07:14,530 INFO L202 CegarAbsIntRunner]: [0], [4], [8], [11], [17], [23], [27], [33], [49], [53], [58], [84], [87], [89], [92], [94], [95], [96], [97], [107], [108], [109], [110], [111], [112], [113] [2018-10-22 16:07:14,532 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-10-22 16:07:14,532 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-22 16:07:14,540 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-10-22 16:07:14,559 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-22 16:07:14,560 INFO L272 AbstractInterpreter]: Visited 26 different actions 38 times. Never merged. Never widened. Never found a fixpoint. Largest state had 14 variables. [2018-10-22 16:07:14,597 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 16:07:14,598 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-22 16:07:14,598 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 16:07:14,598 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 16:07:14,617 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 16:07:14,617 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-22 16:07:14,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 16:07:14,652 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 16:07:14,950 WARN L179 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 11 [2018-10-22 16:07:15,056 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-10-22 16:07:15,056 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 16:07:15,201 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-10-22 16:07:15,232 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 16:07:15,232 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/cvc4nyu Starting monitored process 5 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-10-22 16:07:15,255 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 16:07:15,255 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-22 16:07:15,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 16:07:15,285 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 16:07:15,532 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2018-10-22 16:07:15,533 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 16:07:15,690 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2018-10-22 16:07:15,693 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 3 imperfect interpolant sequences. [2018-10-22 16:07:15,694 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [8, 10, 9] total 22 [2018-10-22 16:07:15,694 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-22 16:07:15,694 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-22 16:07:15,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-22 16:07:15,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=377, Unknown=0, NotChecked=0, Total=462 [2018-10-22 16:07:15,695 INFO L87 Difference]: Start difference. First operand 632 states and 1031 transitions. Second operand 7 states. [2018-10-22 16:07:16,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 16:07:16,588 INFO L93 Difference]: Finished difference Result 945 states and 1569 transitions. [2018-10-22 16:07:16,588 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-22 16:07:16,588 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 33 [2018-10-22 16:07:16,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 16:07:16,597 INFO L225 Difference]: With dead ends: 945 [2018-10-22 16:07:16,597 INFO L226 Difference]: Without dead ends: 943 [2018-10-22 16:07:16,599 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 116 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=106, Invalid=446, Unknown=0, NotChecked=0, Total=552 [2018-10-22 16:07:16,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 943 states. [2018-10-22 16:07:16,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 943 to 858. [2018-10-22 16:07:16,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 858 states. [2018-10-22 16:07:16,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 858 states to 858 states and 1426 transitions. [2018-10-22 16:07:16,859 INFO L78 Accepts]: Start accepts. Automaton has 858 states and 1426 transitions. Word has length 33 [2018-10-22 16:07:16,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 16:07:16,859 INFO L481 AbstractCegarLoop]: Abstraction has 858 states and 1426 transitions. [2018-10-22 16:07:16,860 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-22 16:07:16,861 INFO L276 IsEmpty]: Start isEmpty. Operand 858 states and 1426 transitions. [2018-10-22 16:07:16,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-10-22 16:07:16,862 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 16:07:16,862 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 16:07:16,862 INFO L424 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 16:07:16,866 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 16:07:16,866 INFO L82 PathProgramCache]: Analyzing trace with hash 797412390, now seen corresponding path program 1 times [2018-10-22 16:07:16,866 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 16:07:16,867 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 16:07:16,867 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 16:07:16,867 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 16:07:16,867 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 16:07:16,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 16:07:17,345 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-10-22 16:07:17,346 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 16:07:17,346 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-22 16:07:17,346 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 34 with the following transitions: [2018-10-22 16:07:17,346 INFO L202 CegarAbsIntRunner]: [0], [4], [8], [13], [17], [23], [27], [33], [49], [53], [58], [84], [87], [89], [92], [94], [95], [96], [97], [107], [108], [109], [110], [111], [112], [113] [2018-10-22 16:07:17,348 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-10-22 16:07:17,348 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-22 16:07:17,353 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-10-22 16:07:17,371 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-22 16:07:17,372 INFO L272 AbstractInterpreter]: Visited 26 different actions 38 times. Never merged. Never widened. Never found a fixpoint. Largest state had 14 variables. [2018-10-22 16:07:17,409 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 16:07:17,409 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-22 16:07:17,409 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 16:07:17,410 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 16:07:17,429 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 16:07:17,429 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-22 16:07:17,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 16:07:17,463 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 16:07:17,788 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2018-10-22 16:07:17,788 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 16:07:17,901 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2018-10-22 16:07:17,923 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-10-22 16:07:17,923 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [9] total 17 [2018-10-22 16:07:17,923 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-22 16:07:17,924 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-22 16:07:17,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-22 16:07:17,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2018-10-22 16:07:17,925 INFO L87 Difference]: Start difference. First operand 858 states and 1426 transitions. Second operand 8 states. [2018-10-22 16:07:18,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 16:07:18,643 INFO L93 Difference]: Finished difference Result 917 states and 1504 transitions. [2018-10-22 16:07:18,646 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-22 16:07:18,646 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 33 [2018-10-22 16:07:18,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 16:07:18,656 INFO L225 Difference]: With dead ends: 917 [2018-10-22 16:07:18,656 INFO L226 Difference]: Without dead ends: 915 [2018-10-22 16:07:18,657 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2018-10-22 16:07:18,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 915 states. [2018-10-22 16:07:18,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 915 to 864. [2018-10-22 16:07:18,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 864 states. [2018-10-22 16:07:18,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 864 states to 864 states and 1424 transitions. [2018-10-22 16:07:18,867 INFO L78 Accepts]: Start accepts. Automaton has 864 states and 1424 transitions. Word has length 33 [2018-10-22 16:07:18,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 16:07:18,867 INFO L481 AbstractCegarLoop]: Abstraction has 864 states and 1424 transitions. [2018-10-22 16:07:18,867 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-22 16:07:18,867 INFO L276 IsEmpty]: Start isEmpty. Operand 864 states and 1424 transitions. [2018-10-22 16:07:18,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-10-22 16:07:18,869 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 16:07:18,869 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 16:07:18,869 INFO L424 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 16:07:18,870 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 16:07:18,870 INFO L82 PathProgramCache]: Analyzing trace with hash 1227502379, now seen corresponding path program 1 times [2018-10-22 16:07:18,870 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 16:07:18,871 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 16:07:18,871 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 16:07:18,871 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 16:07:18,871 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 16:07:18,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 16:07:19,080 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 9 proven. 13 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2018-10-22 16:07:19,080 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 16:07:19,080 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-22 16:07:19,081 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 44 with the following transitions: [2018-10-22 16:07:19,081 INFO L202 CegarAbsIntRunner]: [0], [4], [8], [11], [17], [23], [27], [33], [36], [41], [44], [84], [87], [89], [92], [94], [95], [96], [97], [99], [100], [101], [102], [103], [104], [105], [106], [107], [108], [109] [2018-10-22 16:07:19,083 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-10-22 16:07:19,084 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-22 16:07:19,090 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-10-22 16:07:19,115 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-10-22 16:07:19,115 INFO L272 AbstractInterpreter]: Visited 29 different actions 49 times. Never merged. Never widened. Never found a fixpoint. Largest state had 14 variables. [2018-10-22 16:07:19,143 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 16:07:19,143 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-10-22 16:07:19,190 INFO L232 lantSequenceWeakener]: Weakened 31 states. On average, predicates are now at 79.08% of their original sizes. [2018-10-22 16:07:19,190 INFO L411 sIntCurrentIteration]: Unifying AI predicates [2018-10-22 16:07:19,323 INFO L422 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-10-22 16:07:19,324 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-22 16:07:19,324 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [12] imperfect sequences [8] total 18 [2018-10-22 16:07:19,324 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-22 16:07:19,325 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-22 16:07:19,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-22 16:07:19,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2018-10-22 16:07:19,326 INFO L87 Difference]: Start difference. First operand 864 states and 1424 transitions. Second operand 12 states. [2018-10-22 16:07:24,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 16:07:24,607 INFO L93 Difference]: Finished difference Result 945 states and 1543 transitions. [2018-10-22 16:07:24,607 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-10-22 16:07:24,607 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 43 [2018-10-22 16:07:24,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 16:07:24,614 INFO L225 Difference]: With dead ends: 945 [2018-10-22 16:07:24,615 INFO L226 Difference]: Without dead ends: 943 [2018-10-22 16:07:24,616 INFO L605 BasicCegarLoop]: 2 DeclaredPredicates, 53 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=113, Invalid=349, Unknown=0, NotChecked=0, Total=462 [2018-10-22 16:07:24,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 943 states. [2018-10-22 16:07:24,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 943 to 876. [2018-10-22 16:07:24,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 876 states. [2018-10-22 16:07:24,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 876 states to 876 states and 1433 transitions. [2018-10-22 16:07:24,834 INFO L78 Accepts]: Start accepts. Automaton has 876 states and 1433 transitions. Word has length 43 [2018-10-22 16:07:24,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 16:07:24,834 INFO L481 AbstractCegarLoop]: Abstraction has 876 states and 1433 transitions. [2018-10-22 16:07:24,834 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-22 16:07:24,835 INFO L276 IsEmpty]: Start isEmpty. Operand 876 states and 1433 transitions. [2018-10-22 16:07:24,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-10-22 16:07:24,836 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 16:07:24,836 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 16:07:24,836 INFO L424 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 16:07:24,836 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 16:07:24,837 INFO L82 PathProgramCache]: Analyzing trace with hash 1887033901, now seen corresponding path program 1 times [2018-10-22 16:07:24,837 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 16:07:24,837 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 16:07:24,838 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 16:07:24,838 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 16:07:24,838 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 16:07:24,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 16:07:25,213 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 14 proven. 14 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2018-10-22 16:07:25,214 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 16:07:25,214 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-22 16:07:25,214 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 44 with the following transitions: [2018-10-22 16:07:25,215 INFO L202 CegarAbsIntRunner]: [0], [4], [8], [13], [17], [23], [27], [33], [36], [41], [44], [84], [87], [89], [92], [94], [95], [96], [97], [99], [100], [101], [102], [103], [104], [105], [106], [107], [108], [109] [2018-10-22 16:07:25,217 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-10-22 16:07:25,217 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-22 16:07:25,221 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-10-22 16:07:25,239 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-22 16:07:25,239 INFO L272 AbstractInterpreter]: Visited 30 different actions 52 times. Never merged. Never widened. Never found a fixpoint. Largest state had 14 variables. [2018-10-22 16:07:25,275 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 16:07:25,276 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-22 16:07:25,276 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 16:07:25,276 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 16:07:25,331 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 16:07:25,331 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-22 16:07:25,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 16:07:25,369 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 16:07:25,456 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2018-10-22 16:07:25,456 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 16:07:25,536 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2018-10-22 16:07:25,558 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-10-22 16:07:25,558 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [7] total 11 [2018-10-22 16:07:25,558 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-22 16:07:25,559 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-22 16:07:25,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-22 16:07:25,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2018-10-22 16:07:25,559 INFO L87 Difference]: Start difference. First operand 876 states and 1433 transitions. Second operand 4 states. [2018-10-22 16:07:25,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 16:07:25,757 INFO L93 Difference]: Finished difference Result 1027 states and 1662 transitions. [2018-10-22 16:07:25,758 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-22 16:07:25,758 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 43 [2018-10-22 16:07:25,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 16:07:25,763 INFO L225 Difference]: With dead ends: 1027 [2018-10-22 16:07:25,763 INFO L226 Difference]: Without dead ends: 668 [2018-10-22 16:07:25,765 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2018-10-22 16:07:25,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 668 states. [2018-10-22 16:07:25,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 668 to 668. [2018-10-22 16:07:25,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 668 states. [2018-10-22 16:07:25,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 668 states to 668 states and 1082 transitions. [2018-10-22 16:07:25,924 INFO L78 Accepts]: Start accepts. Automaton has 668 states and 1082 transitions. Word has length 43 [2018-10-22 16:07:25,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 16:07:25,924 INFO L481 AbstractCegarLoop]: Abstraction has 668 states and 1082 transitions. [2018-10-22 16:07:25,924 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-22 16:07:25,924 INFO L276 IsEmpty]: Start isEmpty. Operand 668 states and 1082 transitions. [2018-10-22 16:07:25,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2018-10-22 16:07:25,925 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 16:07:25,926 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 4, 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] [2018-10-22 16:07:25,926 INFO L424 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 16:07:25,926 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 16:07:25,926 INFO L82 PathProgramCache]: Analyzing trace with hash 1269153316, now seen corresponding path program 1 times [2018-10-22 16:07:25,926 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 16:07:25,927 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 16:07:25,927 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 16:07:25,927 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 16:07:25,928 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 16:07:25,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 16:07:26,117 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-10-22 16:07:26,117 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 16:07:26,117 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-22 16:07:26,117 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 46 with the following transitions: [2018-10-22 16:07:26,118 INFO L202 CegarAbsIntRunner]: [0], [4], [8], [11], [17], [23], [27], [33], [36], [49], [53], [56], [69], [72], [84], [87], [89], [92], [94], [95], [96], [97], [99], [107], [108], [109], [110], [119], [120], [121], [122] [2018-10-22 16:07:26,119 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-10-22 16:07:26,119 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-22 16:07:26,123 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-10-22 16:07:26,139 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-22 16:07:26,139 INFO L272 AbstractInterpreter]: Visited 31 different actions 47 times. Never merged. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 15 variables. [2018-10-22 16:07:26,144 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 16:07:26,144 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-22 16:07:26,144 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 16:07:26,144 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 16:07:26,153 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 16:07:26,153 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-22 16:07:26,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 16:07:26,183 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 16:07:26,235 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2018-10-22 16:07:26,236 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 16:07:26,274 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2018-10-22 16:07:26,299 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-10-22 16:07:26,299 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [8] total 11 [2018-10-22 16:07:26,299 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-22 16:07:26,300 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-22 16:07:26,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-22 16:07:26,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2018-10-22 16:07:26,300 INFO L87 Difference]: Start difference. First operand 668 states and 1082 transitions. Second operand 7 states. [2018-10-22 16:07:26,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 16:07:26,649 INFO L93 Difference]: Finished difference Result 678 states and 1090 transitions. [2018-10-22 16:07:26,650 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-22 16:07:26,650 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 45 [2018-10-22 16:07:26,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 16:07:26,655 INFO L225 Difference]: With dead ends: 678 [2018-10-22 16:07:26,656 INFO L226 Difference]: Without dead ends: 676 [2018-10-22 16:07:26,657 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 86 SyntacticMatches, 5 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2018-10-22 16:07:26,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 676 states. [2018-10-22 16:07:26,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 676 to 670. [2018-10-22 16:07:26,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 670 states. [2018-10-22 16:07:26,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 670 states to 670 states and 1081 transitions. [2018-10-22 16:07:26,826 INFO L78 Accepts]: Start accepts. Automaton has 670 states and 1081 transitions. Word has length 45 [2018-10-22 16:07:26,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 16:07:26,826 INFO L481 AbstractCegarLoop]: Abstraction has 670 states and 1081 transitions. [2018-10-22 16:07:26,827 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-22 16:07:26,827 INFO L276 IsEmpty]: Start isEmpty. Operand 670 states and 1081 transitions. [2018-10-22 16:07:26,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-10-22 16:07:26,828 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 16:07:26,828 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 5, 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] [2018-10-22 16:07:26,828 INFO L424 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 16:07:26,828 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 16:07:26,829 INFO L82 PathProgramCache]: Analyzing trace with hash -893792404, now seen corresponding path program 1 times [2018-10-22 16:07:26,829 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 16:07:26,829 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 16:07:26,830 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 16:07:26,830 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 16:07:26,830 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 16:07:26,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 16:07:27,012 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2018-10-22 16:07:27,012 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 16:07:27,012 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-22 16:07:27,012 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 51 with the following transitions: [2018-10-22 16:07:27,013 INFO L202 CegarAbsIntRunner]: [0], [4], [8], [11], [17], [23], [27], [33], [49], [53], [56], [69], [72], [84], [87], [89], [92], [94], [95], [96], [97], [107], [108], [109], [110], [119], [120], [121], [122] [2018-10-22 16:07:27,014 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-10-22 16:07:27,014 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-22 16:07:27,018 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-10-22 16:07:27,031 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-22 16:07:27,031 INFO L272 AbstractInterpreter]: Visited 29 different actions 41 times. Never merged. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 15 variables. [2018-10-22 16:07:27,036 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 16:07:27,036 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-22 16:07:27,036 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 16:07:27,036 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 16:07:27,046 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 16:07:27,046 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-22 16:07:27,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 16:07:27,063 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 16:07:27,134 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 28 proven. 3 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2018-10-22 16:07:27,134 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 16:07:27,245 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 14 proven. 3 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2018-10-22 16:07:27,267 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 16:07:27,267 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/cvc4nyu Starting monitored process 10 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-10-22 16:07:27,283 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 16:07:27,283 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-22 16:07:27,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 16:07:27,317 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 16:07:27,367 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 28 proven. 3 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2018-10-22 16:07:27,367 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 16:07:27,516 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 14 proven. 3 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2018-10-22 16:07:27,521 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-10-22 16:07:27,521 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6, 6, 6] total 15 [2018-10-22 16:07:27,521 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-22 16:07:27,522 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-22 16:07:27,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-22 16:07:27,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2018-10-22 16:07:27,522 INFO L87 Difference]: Start difference. First operand 670 states and 1081 transitions. Second operand 11 states. [2018-10-22 16:07:29,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 16:07:29,725 INFO L93 Difference]: Finished difference Result 1351 states and 2212 transitions. [2018-10-22 16:07:29,732 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-10-22 16:07:29,732 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 50 [2018-10-22 16:07:29,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 16:07:29,739 INFO L225 Difference]: With dead ends: 1351 [2018-10-22 16:07:29,740 INFO L226 Difference]: Without dead ends: 1027 [2018-10-22 16:07:29,743 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 201 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=169, Invalid=587, Unknown=0, NotChecked=0, Total=756 [2018-10-22 16:07:29,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1027 states. [2018-10-22 16:07:29,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1027 to 793. [2018-10-22 16:07:29,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 793 states. [2018-10-22 16:07:29,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 793 states to 793 states and 1295 transitions. [2018-10-22 16:07:29,945 INFO L78 Accepts]: Start accepts. Automaton has 793 states and 1295 transitions. Word has length 50 [2018-10-22 16:07:29,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 16:07:29,946 INFO L481 AbstractCegarLoop]: Abstraction has 793 states and 1295 transitions. [2018-10-22 16:07:29,946 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-22 16:07:29,946 INFO L276 IsEmpty]: Start isEmpty. Operand 793 states and 1295 transitions. [2018-10-22 16:07:29,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2018-10-22 16:07:29,947 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 16:07:29,948 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 7, 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] [2018-10-22 16:07:29,948 INFO L424 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 16:07:29,948 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 16:07:29,948 INFO L82 PathProgramCache]: Analyzing trace with hash -1004327087, now seen corresponding path program 1 times [2018-10-22 16:07:29,948 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 16:07:29,949 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 16:07:29,949 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 16:07:29,949 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 16:07:29,949 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 16:07:29,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 16:07:30,231 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 18 proven. 19 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2018-10-22 16:07:30,231 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 16:07:30,232 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-22 16:07:30,232 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 61 with the following transitions: [2018-10-22 16:07:30,232 INFO L202 CegarAbsIntRunner]: [0], [4], [8], [11], [17], [23], [27], [33], [36], [49], [53], [56], [74], [77], [84], [87], [89], [92], [94], [95], [96], [97], [99], [100], [101], [102], [103], [104], [105], [107], [108], [109], [110], [123], [124], [125], [126] [2018-10-22 16:07:30,233 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-10-22 16:07:30,233 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-22 16:07:30,237 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-10-22 16:07:30,377 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-10-22 16:07:30,377 INFO L272 AbstractInterpreter]: Visited 36 different actions 406 times. Merged at 17 different actions 102 times. Widened at 2 different actions 4 times. Found 1 fixpoints after 1 different actions. Largest state had 15 variables. [2018-10-22 16:07:30,416 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 16:07:30,416 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-10-22 16:07:30,481 INFO L232 lantSequenceWeakener]: Weakened 46 states. On average, predicates are now at 76.37% of their original sizes. [2018-10-22 16:07:30,481 INFO L411 sIntCurrentIteration]: Unifying AI predicates [2018-10-22 16:07:30,781 INFO L422 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-10-22 16:07:30,781 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-22 16:07:30,781 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [16] imperfect sequences [8] total 22 [2018-10-22 16:07:30,781 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-22 16:07:30,782 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-10-22 16:07:30,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-10-22 16:07:30,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2018-10-22 16:07:30,782 INFO L87 Difference]: Start difference. First operand 793 states and 1295 transitions. Second operand 16 states. [2018-10-22 16:07:47,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 16:07:47,096 INFO L93 Difference]: Finished difference Result 1409 states and 2304 transitions. [2018-10-22 16:07:47,096 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-10-22 16:07:47,096 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 60 [2018-10-22 16:07:47,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 16:07:47,102 INFO L225 Difference]: With dead ends: 1409 [2018-10-22 16:07:47,102 INFO L226 Difference]: Without dead ends: 1017 [2018-10-22 16:07:47,105 INFO L605 BasicCegarLoop]: 2 DeclaredPredicates, 91 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 540 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=478, Invalid=1684, Unknown=0, NotChecked=0, Total=2162 [2018-10-22 16:07:47,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1017 states. [2018-10-22 16:07:47,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1017 to 930. [2018-10-22 16:07:47,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 930 states. [2018-10-22 16:07:47,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 930 states to 930 states and 1517 transitions. [2018-10-22 16:07:47,399 INFO L78 Accepts]: Start accepts. Automaton has 930 states and 1517 transitions. Word has length 60 [2018-10-22 16:07:47,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 16:07:47,400 INFO L481 AbstractCegarLoop]: Abstraction has 930 states and 1517 transitions. [2018-10-22 16:07:47,400 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-10-22 16:07:47,400 INFO L276 IsEmpty]: Start isEmpty. Operand 930 states and 1517 transitions. [2018-10-22 16:07:47,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2018-10-22 16:07:47,402 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 16:07:47,402 INFO L375 BasicCegarLoop]: trace histogram [10, 9, 9, 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] [2018-10-22 16:07:47,402 INFO L424 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 16:07:47,402 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 16:07:47,402 INFO L82 PathProgramCache]: Analyzing trace with hash -283854137, now seen corresponding path program 1 times [2018-10-22 16:07:47,403 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 16:07:47,403 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 16:07:47,403 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 16:07:47,404 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 16:07:47,404 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 16:07:47,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 16:07:47,485 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 25 proven. 2 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2018-10-22 16:07:47,486 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 16:07:47,486 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-22 16:07:47,486 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 70 with the following transitions: [2018-10-22 16:07:47,486 INFO L202 CegarAbsIntRunner]: [0], [4], [8], [11], [17], [23], [27], [33], [49], [53], [58], [63], [84], [87], [89], [92], [94], [95], [96], [97], [107], [108], [109], [110], [111], [112], [113], [114], [115], [116], [117], [118] [2018-10-22 16:07:47,487 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-10-22 16:07:47,487 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-22 16:07:47,491 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-10-22 16:07:47,521 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-22 16:07:47,521 INFO L272 AbstractInterpreter]: Visited 32 different actions 95 times. Merged at 12 different actions 12 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 14 variables. [2018-10-22 16:07:47,530 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 16:07:47,530 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-22 16:07:47,530 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 16:07:47,530 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 16:07:47,540 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 16:07:47,541 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-22 16:07:47,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 16:07:47,564 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 16:07:47,680 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 93 proven. 0 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2018-10-22 16:07:47,681 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 16:07:47,737 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 25 proven. 2 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2018-10-22 16:07:47,759 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-10-22 16:07:47,760 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [5, 6] total 12 [2018-10-22 16:07:47,760 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-22 16:07:47,760 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-22 16:07:47,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-22 16:07:47,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2018-10-22 16:07:47,761 INFO L87 Difference]: Start difference. First operand 930 states and 1517 transitions. Second operand 6 states. [2018-10-22 16:07:48,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 16:07:48,645 INFO L93 Difference]: Finished difference Result 1761 states and 2849 transitions. [2018-10-22 16:07:48,645 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-22 16:07:48,646 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 69 [2018-10-22 16:07:48,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 16:07:48,652 INFO L225 Difference]: With dead ends: 1761 [2018-10-22 16:07:48,652 INFO L226 Difference]: Without dead ends: 912 [2018-10-22 16:07:48,657 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 131 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2018-10-22 16:07:48,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 912 states. [2018-10-22 16:07:48,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 912 to 855. [2018-10-22 16:07:48,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 855 states. [2018-10-22 16:07:48,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 855 states to 855 states and 1380 transitions. [2018-10-22 16:07:48,932 INFO L78 Accepts]: Start accepts. Automaton has 855 states and 1380 transitions. Word has length 69 [2018-10-22 16:07:48,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 16:07:48,933 INFO L481 AbstractCegarLoop]: Abstraction has 855 states and 1380 transitions. [2018-10-22 16:07:48,933 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-22 16:07:48,933 INFO L276 IsEmpty]: Start isEmpty. Operand 855 states and 1380 transitions. [2018-10-22 16:07:48,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2018-10-22 16:07:48,935 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 16:07:48,935 INFO L375 BasicCegarLoop]: trace histogram [10, 9, 9, 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] [2018-10-22 16:07:48,936 INFO L424 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 16:07:48,936 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 16:07:48,936 INFO L82 PathProgramCache]: Analyzing trace with hash -71103634, now seen corresponding path program 1 times [2018-10-22 16:07:48,936 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 16:07:48,937 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 16:07:48,937 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 16:07:48,937 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 16:07:48,937 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 16:07:48,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 16:07:49,311 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 22 proven. 27 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2018-10-22 16:07:49,312 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 16:07:49,312 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-22 16:07:49,312 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 73 with the following transitions: [2018-10-22 16:07:49,312 INFO L202 CegarAbsIntRunner]: [0], [4], [8], [11], [17], [23], [27], [33], [36], [41], [44], [49], [53], [56], [74], [77], [84], [87], [89], [92], [94], [95], [96], [97], [99], [100], [101], [102], [103], [104], [105], [106], [107], [108], [109], [110], [123], [124], [125], [126] [2018-10-22 16:07:49,313 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-10-22 16:07:49,313 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-22 16:07:49,317 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-10-22 16:07:49,484 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-10-22 16:07:49,485 INFO L272 AbstractInterpreter]: Visited 39 different actions 481 times. Merged at 20 different actions 129 times. Widened at 2 different actions 3 times. Found 7 fixpoints after 4 different actions. Largest state had 16 variables. [2018-10-22 16:07:49,497 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 16:07:49,497 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-10-22 16:07:49,569 INFO L232 lantSequenceWeakener]: Weakened 56 states. On average, predicates are now at 77.38% of their original sizes. [2018-10-22 16:07:49,569 INFO L411 sIntCurrentIteration]: Unifying AI predicates [2018-10-22 16:07:49,879 INFO L422 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-10-22 16:07:49,880 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-22 16:07:49,880 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [18] imperfect sequences [9] total 25 [2018-10-22 16:07:49,880 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-22 16:07:49,880 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-10-22 16:07:49,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-10-22 16:07:49,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2018-10-22 16:07:49,882 INFO L87 Difference]: Start difference. First operand 855 states and 1380 transitions. Second operand 18 states. [2018-10-22 16:08:01,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 16:08:01,363 INFO L93 Difference]: Finished difference Result 1460 states and 2351 transitions. [2018-10-22 16:08:01,363 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-10-22 16:08:01,363 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 72 [2018-10-22 16:08:01,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 16:08:01,369 INFO L225 Difference]: With dead ends: 1460 [2018-10-22 16:08:01,369 INFO L226 Difference]: Without dead ends: 1070 [2018-10-22 16:08:01,373 INFO L605 BasicCegarLoop]: 2 DeclaredPredicates, 112 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 882 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=707, Invalid=2599, Unknown=0, NotChecked=0, Total=3306 [2018-10-22 16:08:01,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1070 states. [2018-10-22 16:08:01,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1070 to 863. [2018-10-22 16:08:01,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 863 states. [2018-10-22 16:08:01,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 863 states to 863 states and 1385 transitions. [2018-10-22 16:08:01,597 INFO L78 Accepts]: Start accepts. Automaton has 863 states and 1385 transitions. Word has length 72 [2018-10-22 16:08:01,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 16:08:01,598 INFO L481 AbstractCegarLoop]: Abstraction has 863 states and 1385 transitions. [2018-10-22 16:08:01,598 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-10-22 16:08:01,598 INFO L276 IsEmpty]: Start isEmpty. Operand 863 states and 1385 transitions. [2018-10-22 16:08:01,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2018-10-22 16:08:01,600 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 16:08:01,600 INFO L375 BasicCegarLoop]: trace histogram [10, 9, 9, 3, 3, 3, 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] [2018-10-22 16:08:01,600 INFO L424 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 16:08:01,600 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 16:08:01,600 INFO L82 PathProgramCache]: Analyzing trace with hash -1745021926, now seen corresponding path program 1 times [2018-10-22 16:08:01,601 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 16:08:01,601 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 16:08:01,601 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 16:08:01,601 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 16:08:01,602 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 16:08:01,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 16:08:01,655 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2018-10-22 16:08:01,656 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-22 16:08:01,656 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-22 16:08:01,656 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-22 16:08:01,656 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-22 16:08:01,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-22 16:08:01,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-22 16:08:01,657 INFO L87 Difference]: Start difference. First operand 863 states and 1385 transitions. Second operand 3 states. [2018-10-22 16:08:01,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 16:08:01,835 INFO L93 Difference]: Finished difference Result 1028 states and 1632 transitions. [2018-10-22 16:08:01,835 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-22 16:08:01,835 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 76 [2018-10-22 16:08:01,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 16:08:01,840 INFO L225 Difference]: With dead ends: 1028 [2018-10-22 16:08:01,840 INFO L226 Difference]: Without dead ends: 749 [2018-10-22 16:08:01,842 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-22 16:08:01,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 749 states. [2018-10-22 16:08:02,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 749 to 655. [2018-10-22 16:08:02,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 655 states. [2018-10-22 16:08:02,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 655 states to 655 states and 1021 transitions. [2018-10-22 16:08:02,011 INFO L78 Accepts]: Start accepts. Automaton has 655 states and 1021 transitions. Word has length 76 [2018-10-22 16:08:02,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 16:08:02,011 INFO L481 AbstractCegarLoop]: Abstraction has 655 states and 1021 transitions. [2018-10-22 16:08:02,011 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-22 16:08:02,011 INFO L276 IsEmpty]: Start isEmpty. Operand 655 states and 1021 transitions. [2018-10-22 16:08:02,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2018-10-22 16:08:02,013 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 16:08:02,013 INFO L375 BasicCegarLoop]: trace histogram [11, 10, 10, 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] [2018-10-22 16:08:02,013 INFO L424 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 16:08:02,013 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 16:08:02,014 INFO L82 PathProgramCache]: Analyzing trace with hash -217479284, now seen corresponding path program 1 times [2018-10-22 16:08:02,014 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 16:08:02,014 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 16:08:02,015 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 16:08:02,015 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 16:08:02,015 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 16:08:02,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 16:08:02,143 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 28 proven. 28 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2018-10-22 16:08:02,144 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 16:08:02,144 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-22 16:08:02,144 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 80 with the following transitions: [2018-10-22 16:08:02,144 INFO L202 CegarAbsIntRunner]: [0], [4], [8], [11], [17], [23], [27], [33], [36], [41], [44], [49], [53], [56], [58], [69], [72], [84], [87], [89], [92], [94], [95], [96], [97], [99], [100], [101], [102], [103], [104], [105], [106], [107], [108], [109], [110], [111], [119], [120], [121], [122] [2018-10-22 16:08:02,146 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-10-22 16:08:02,146 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-22 16:08:02,149 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-10-22 16:08:02,181 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-22 16:08:02,182 INFO L272 AbstractInterpreter]: Visited 42 different actions 109 times. Merged at 9 different actions 9 times. Never widened. Found 2 fixpoints after 1 different actions. Largest state had 16 variables. [2018-10-22 16:08:02,211 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 16:08:02,212 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-22 16:08:02,212 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 16:08:02,212 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 16:08:02,226 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 16:08:02,227 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-22 16:08:02,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 16:08:02,263 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 16:08:02,339 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2018-10-22 16:08:02,340 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 16:08:02,393 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2018-10-22 16:08:02,450 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-10-22 16:08:02,451 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [8] total 10 [2018-10-22 16:08:02,451 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-22 16:08:02,451 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-22 16:08:02,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-22 16:08:02,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2018-10-22 16:08:02,452 INFO L87 Difference]: Start difference. First operand 655 states and 1021 transitions. Second operand 7 states. [2018-10-22 16:08:02,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 16:08:02,790 INFO L93 Difference]: Finished difference Result 751 states and 1156 transitions. [2018-10-22 16:08:02,791 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-22 16:08:02,791 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 79 [2018-10-22 16:08:02,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 16:08:02,795 INFO L225 Difference]: With dead ends: 751 [2018-10-22 16:08:02,795 INFO L226 Difference]: Without dead ends: 749 [2018-10-22 16:08:02,796 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 156 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2018-10-22 16:08:02,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 749 states. [2018-10-22 16:08:02,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 749 to 675. [2018-10-22 16:08:02,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 675 states. [2018-10-22 16:08:02,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 675 states to 675 states and 1036 transitions. [2018-10-22 16:08:02,982 INFO L78 Accepts]: Start accepts. Automaton has 675 states and 1036 transitions. Word has length 79 [2018-10-22 16:08:02,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 16:08:02,983 INFO L481 AbstractCegarLoop]: Abstraction has 675 states and 1036 transitions. [2018-10-22 16:08:02,983 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-22 16:08:02,983 INFO L276 IsEmpty]: Start isEmpty. Operand 675 states and 1036 transitions. [2018-10-22 16:08:02,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2018-10-22 16:08:02,984 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 16:08:02,985 INFO L375 BasicCegarLoop]: trace histogram [13, 12, 12, 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] [2018-10-22 16:08:02,985 INFO L424 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 16:08:02,985 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 16:08:02,985 INFO L82 PathProgramCache]: Analyzing trace with hash 1211133516, now seen corresponding path program 1 times [2018-10-22 16:08:02,985 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 16:08:02,986 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 16:08:02,986 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 16:08:02,986 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 16:08:02,987 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 16:08:02,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 16:08:03,141 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 35 proven. 57 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2018-10-22 16:08:03,142 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 16:08:03,142 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-22 16:08:03,142 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 87 with the following transitions: [2018-10-22 16:08:03,142 INFO L202 CegarAbsIntRunner]: [0], [4], [8], [11], [17], [23], [27], [33], [36], [41], [44], [49], [53], [58], [63], [84], [87], [89], [92], [94], [95], [96], [97], [99], [100], [101], [102], [103], [104], [105], [106], [107], [108], [109], [110], [111], [112], [113], [114], [115], [116], [117], [118] [2018-10-22 16:08:03,144 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-10-22 16:08:03,144 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-22 16:08:03,147 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-10-22 16:08:03,230 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-22 16:08:03,230 INFO L272 AbstractInterpreter]: Visited 43 different actions 339 times. Merged at 19 different actions 63 times. Never widened. Found 4 fixpoints after 1 different actions. Largest state had 15 variables. [2018-10-22 16:08:03,236 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 16:08:03,236 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-22 16:08:03,236 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 16:08:03,236 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 16:08:03,245 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 16:08:03,245 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-22 16:08:03,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 16:08:03,270 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 16:08:03,422 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 24 proven. 8 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2018-10-22 16:08:03,422 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 16:08:03,489 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 24 proven. 8 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2018-10-22 16:08:03,510 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 16:08:03,510 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/cvc4nyu Starting monitored process 14 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-10-22 16:08:03,525 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 16:08:03,525 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-22 16:08:03,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 16:08:03,580 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 16:08:06,373 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 108 proven. 0 refuted. 0 times theorem prover too weak. 188 trivial. 0 not checked. [2018-10-22 16:08:06,373 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 16:08:06,634 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 30 proven. 2 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2018-10-22 16:08:06,636 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 4 imperfect interpolant sequences. [2018-10-22 16:08:06,636 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [7, 8, 8, 7] total 25 [2018-10-22 16:08:06,636 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-22 16:08:06,636 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-22 16:08:06,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-22 16:08:06,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=510, Unknown=2, NotChecked=0, Total=600 [2018-10-22 16:08:06,637 INFO L87 Difference]: Start difference. First operand 675 states and 1036 transitions. Second operand 7 states. [2018-10-22 16:08:49,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 16:08:49,930 INFO L93 Difference]: Finished difference Result 1257 states and 1918 transitions. [2018-10-22 16:08:49,931 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-22 16:08:49,931 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 86 [2018-10-22 16:08:49,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 16:08:49,935 INFO L225 Difference]: With dead ends: 1257 [2018-10-22 16:08:49,935 INFO L226 Difference]: Without dead ends: 505 [2018-10-22 16:08:49,940 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 356 GetRequests, 328 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=136, Invalid=615, Unknown=5, NotChecked=0, Total=756 [2018-10-22 16:08:49,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 505 states. [2018-10-22 16:08:50,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 505 to 484. [2018-10-22 16:08:50,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 484 states. [2018-10-22 16:08:50,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 484 states to 484 states and 748 transitions. [2018-10-22 16:08:50,059 INFO L78 Accepts]: Start accepts. Automaton has 484 states and 748 transitions. Word has length 86 [2018-10-22 16:08:50,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 16:08:50,059 INFO L481 AbstractCegarLoop]: Abstraction has 484 states and 748 transitions. [2018-10-22 16:08:50,059 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-22 16:08:50,059 INFO L276 IsEmpty]: Start isEmpty. Operand 484 states and 748 transitions. [2018-10-22 16:08:50,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2018-10-22 16:08:50,060 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 16:08:50,061 INFO L375 BasicCegarLoop]: trace histogram [14, 13, 13, 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] [2018-10-22 16:08:50,061 INFO L424 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 16:08:50,061 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 16:08:50,061 INFO L82 PathProgramCache]: Analyzing trace with hash -1110106265, now seen corresponding path program 1 times [2018-10-22 16:08:50,061 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 16:08:50,062 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 16:08:50,062 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 16:08:50,062 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 16:08:50,062 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 16:08:50,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 16:08:50,317 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 25 proven. 46 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2018-10-22 16:08:50,317 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 16:08:50,317 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-22 16:08:50,317 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 92 with the following transitions: [2018-10-22 16:08:50,317 INFO L202 CegarAbsIntRunner]: [0], [4], [8], [11], [17], [23], [27], [33], [36], [41], [46], [49], [53], [58], [63], [84], [87], [89], [92], [94], [95], [96], [97], [99], [100], [101], [102], [103], [104], [105], [106], [107], [108], [109], [110], [111], [112], [113], [114], [115], [116], [117], [118] [2018-10-22 16:08:50,319 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-10-22 16:08:50,319 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-22 16:08:50,323 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-10-22 16:08:50,406 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-22 16:08:50,406 INFO L272 AbstractInterpreter]: Visited 43 different actions 339 times. Merged at 19 different actions 63 times. Never widened. Found 4 fixpoints after 1 different actions. Largest state had 15 variables. [2018-10-22 16:08:50,412 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 16:08:50,412 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-22 16:08:50,412 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 16:08:50,412 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 16:08:50,421 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 16:08:50,421 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-22 16:08:50,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 16:08:50,448 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 16:08:50,631 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 28 proven. 7 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2018-10-22 16:08:50,631 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 16:08:50,803 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 26 proven. 9 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2018-10-22 16:08:50,824 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 16:08:50,824 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/cvc4nyu Starting monitored process 16 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-10-22 16:08:50,840 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 16:08:50,840 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-22 16:08:50,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 16:08:50,899 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 16:08:55,439 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 149 proven. 0 refuted. 0 times theorem prover too weak. 198 trivial. 0 not checked. [2018-10-22 16:08:55,439 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 16:08:55,563 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 33 proven. 2 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2018-10-22 16:08:55,565 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 4 imperfect interpolant sequences. [2018-10-22 16:08:55,565 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [8, 9, 9, 6] total 27 [2018-10-22 16:08:55,565 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-22 16:08:55,566 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-22 16:08:55,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-22 16:08:55,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=612, Unknown=2, NotChecked=0, Total=702 [2018-10-22 16:08:55,566 INFO L87 Difference]: Start difference. First operand 484 states and 748 transitions. Second operand 6 states. [2018-10-22 16:09:08,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 16:09:08,316 INFO L93 Difference]: Finished difference Result 896 states and 1402 transitions. [2018-10-22 16:09:08,318 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-22 16:09:08,319 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 91 [2018-10-22 16:09:08,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 16:09:08,323 INFO L225 Difference]: With dead ends: 896 [2018-10-22 16:09:08,323 INFO L226 Difference]: Without dead ends: 479 [2018-10-22 16:09:08,326 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 372 GetRequests, 346 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=88, Invalid=612, Unknown=2, NotChecked=0, Total=702 [2018-10-22 16:09:08,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 479 states. [2018-10-22 16:09:08,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 479 to 469. [2018-10-22 16:09:08,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 469 states. [2018-10-22 16:09:08,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 469 states to 469 states and 727 transitions. [2018-10-22 16:09:08,426 INFO L78 Accepts]: Start accepts. Automaton has 469 states and 727 transitions. Word has length 91 [2018-10-22 16:09:08,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 16:09:08,427 INFO L481 AbstractCegarLoop]: Abstraction has 469 states and 727 transitions. [2018-10-22 16:09:08,427 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-22 16:09:08,427 INFO L276 IsEmpty]: Start isEmpty. Operand 469 states and 727 transitions. [2018-10-22 16:09:08,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2018-10-22 16:09:08,429 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 16:09:08,429 INFO L375 BasicCegarLoop]: trace histogram [16, 15, 15, 3, 3, 3, 3, 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] [2018-10-22 16:09:08,429 INFO L424 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 16:09:08,429 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 16:09:08,429 INFO L82 PathProgramCache]: Analyzing trace with hash 747034348, now seen corresponding path program 1 times [2018-10-22 16:09:08,430 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 16:09:08,430 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 16:09:08,430 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 16:09:08,430 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 16:09:08,431 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 16:09:08,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 16:09:08,785 INFO L134 CoverageAnalysis]: Checked inductivity of 474 backedges. 35 proven. 59 refuted. 0 times theorem prover too weak. 380 trivial. 0 not checked. [2018-10-22 16:09:08,785 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 16:09:08,785 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-22 16:09:08,786 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 112 with the following transitions: [2018-10-22 16:09:08,786 INFO L202 CegarAbsIntRunner]: [0], [4], [8], [11], [17], [23], [27], [33], [36], [41], [44], [49], [53], [56], [69], [72], [74], [77], [84], [87], [89], [92], [94], [95], [96], [97], [99], [100], [101], [102], [103], [104], [105], [106], [107], [108], [109], [110], [119], [120], [121], [122], [123], [124], [125], [126] [2018-10-22 16:09:08,787 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-10-22 16:09:08,787 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-22 16:09:08,793 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-10-22 16:09:08,959 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-22 16:09:08,959 INFO L272 AbstractInterpreter]: Visited 46 different actions 617 times. Merged at 23 different actions 153 times. Widened at 2 different actions 3 times. Found 17 fixpoints after 6 different actions. Largest state had 17 variables. [2018-10-22 16:09:08,968 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 16:09:08,968 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-22 16:09:08,968 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 16:09:08,968 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 16:09:08,976 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 16:09:08,976 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-22 16:09:09,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 16:09:09,011 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 16:09:09,158 INFO L134 CoverageAnalysis]: Checked inductivity of 474 backedges. 36 proven. 16 refuted. 0 times theorem prover too weak. 422 trivial. 0 not checked. [2018-10-22 16:09:09,159 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 16:09:09,313 INFO L134 CoverageAnalysis]: Checked inductivity of 474 backedges. 38 proven. 14 refuted. 0 times theorem prover too weak. 422 trivial. 0 not checked. [2018-10-22 16:09:09,335 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 16:09:09,335 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/cvc4nyu Starting monitored process 18 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-10-22 16:09:09,354 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 16:09:09,354 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-22 16:09:09,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 16:09:09,425 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 16:09:09,459 INFO L134 CoverageAnalysis]: Checked inductivity of 474 backedges. 36 proven. 16 refuted. 0 times theorem prover too weak. 422 trivial. 0 not checked. [2018-10-22 16:09:09,459 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 16:09:09,563 INFO L134 CoverageAnalysis]: Checked inductivity of 474 backedges. 38 proven. 14 refuted. 0 times theorem prover too weak. 422 trivial. 0 not checked. [2018-10-22 16:09:09,564 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-10-22 16:09:09,565 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9, 9, 9] total 19 [2018-10-22 16:09:09,565 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-22 16:09:09,565 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-10-22 16:09:09,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-10-22 16:09:09,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2018-10-22 16:09:09,566 INFO L87 Difference]: Start difference. First operand 469 states and 727 transitions. Second operand 14 states. [2018-10-22 16:09:10,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 16:09:10,679 INFO L93 Difference]: Finished difference Result 592 states and 918 transitions. [2018-10-22 16:09:10,679 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-10-22 16:09:10,679 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 111 [2018-10-22 16:09:10,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 16:09:10,684 INFO L225 Difference]: With dead ends: 592 [2018-10-22 16:09:10,684 INFO L226 Difference]: Without dead ends: 590 [2018-10-22 16:09:10,685 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 463 GetRequests, 432 SyntacticMatches, 5 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=155, Invalid=601, Unknown=0, NotChecked=0, Total=756 [2018-10-22 16:09:10,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 590 states. [2018-10-22 16:09:10,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 590 to 361. [2018-10-22 16:09:10,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 361 states. [2018-10-22 16:09:10,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 361 states to 361 states and 542 transitions. [2018-10-22 16:09:10,798 INFO L78 Accepts]: Start accepts. Automaton has 361 states and 542 transitions. Word has length 111 [2018-10-22 16:09:10,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 16:09:10,798 INFO L481 AbstractCegarLoop]: Abstraction has 361 states and 542 transitions. [2018-10-22 16:09:10,799 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-10-22 16:09:10,799 INFO L276 IsEmpty]: Start isEmpty. Operand 361 states and 542 transitions. [2018-10-22 16:09:10,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2018-10-22 16:09:10,801 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 16:09:10,801 INFO L375 BasicCegarLoop]: trace histogram [17, 16, 16, 3, 3, 3, 3, 3, 3, 3, 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] [2018-10-22 16:09:10,801 INFO L424 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 16:09:10,801 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 16:09:10,801 INFO L82 PathProgramCache]: Analyzing trace with hash -689243127, now seen corresponding path program 1 times [2018-10-22 16:09:10,801 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 16:09:10,802 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 16:09:10,802 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 16:09:10,802 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 16:09:10,803 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 16:09:10,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 16:09:11,279 INFO L134 CoverageAnalysis]: Checked inductivity of 536 backedges. 65 proven. 69 refuted. 0 times theorem prover too weak. 402 trivial. 0 not checked. [2018-10-22 16:09:11,279 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 16:09:11,280 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-22 16:09:11,280 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 116 with the following transitions: [2018-10-22 16:09:11,280 INFO L202 CegarAbsIntRunner]: [0], [4], [8], [11], [17], [23], [27], [33], [36], [41], [44], [49], [53], [56], [58], [63], [69], [72], [84], [87], [89], [92], [94], [95], [96], [97], [99], [100], [101], [102], [103], [104], [105], [106], [107], [108], [109], [110], [111], [112], [113], [114], [115], [116], [117], [118], [119], [120], [121], [122] [2018-10-22 16:09:11,281 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-10-22 16:09:11,281 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-22 16:09:11,296 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-10-22 16:09:11,447 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-22 16:09:11,447 INFO L272 AbstractInterpreter]: Visited 50 different actions 435 times. Merged at 23 different actions 83 times. Never widened. Found 10 fixpoints after 2 different actions. Largest state had 16 variables. [2018-10-22 16:09:11,480 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 16:09:11,480 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-22 16:09:11,480 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 16:09:11,481 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 16:09:11,496 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 16:09:11,497 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-22 16:09:11,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 16:09:11,538 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 16:09:12,401 INFO L134 CoverageAnalysis]: Checked inductivity of 536 backedges. 155 proven. 9 refuted. 0 times theorem prover too weak. 372 trivial. 0 not checked. [2018-10-22 16:09:12,401 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 16:09:15,906 INFO L134 CoverageAnalysis]: Checked inductivity of 536 backedges. 45 proven. 11 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2018-10-22 16:09:15,929 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 16:09:15,929 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/cvc4nyu Starting monitored process 20 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-10-22 16:09:15,947 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 16:09:15,948 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-22 16:09:16,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 16:09:16,016 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 16:09:16,113 INFO L134 CoverageAnalysis]: Checked inductivity of 536 backedges. 155 proven. 9 refuted. 0 times theorem prover too weak. 372 trivial. 0 not checked. [2018-10-22 16:09:16,113 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 16:09:17,754 INFO L134 CoverageAnalysis]: Checked inductivity of 536 backedges. 45 proven. 11 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2018-10-22 16:09:17,756 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-10-22 16:09:17,757 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 9, 9, 9] total 21 [2018-10-22 16:09:17,757 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-22 16:09:17,757 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-10-22 16:09:17,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-10-22 16:09:17,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=357, Unknown=2, NotChecked=0, Total=420 [2018-10-22 16:09:17,758 INFO L87 Difference]: Start difference. First operand 361 states and 542 transitions. Second operand 14 states. [2018-10-22 16:09:19,677 WARN L179 SmtUtils]: Spent 502.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2018-10-22 16:09:33,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 16:09:33,745 INFO L93 Difference]: Finished difference Result 1042 states and 1635 transitions. [2018-10-22 16:09:33,746 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-10-22 16:09:33,746 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 115 [2018-10-22 16:09:33,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 16:09:33,750 INFO L225 Difference]: With dead ends: 1042 [2018-10-22 16:09:33,751 INFO L226 Difference]: Without dead ends: 730 [2018-10-22 16:09:33,753 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 511 GetRequests, 464 SyntacticMatches, 5 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 392 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=392, Invalid=1498, Unknown=2, NotChecked=0, Total=1892 [2018-10-22 16:09:33,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 730 states. [2018-10-22 16:09:33,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 730 to 570. [2018-10-22 16:09:33,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 570 states. [2018-10-22 16:09:33,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 570 states to 570 states and 898 transitions. [2018-10-22 16:09:33,953 INFO L78 Accepts]: Start accepts. Automaton has 570 states and 898 transitions. Word has length 115 [2018-10-22 16:09:33,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 16:09:33,954 INFO L481 AbstractCegarLoop]: Abstraction has 570 states and 898 transitions. [2018-10-22 16:09:33,954 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-10-22 16:09:33,954 INFO L276 IsEmpty]: Start isEmpty. Operand 570 states and 898 transitions. [2018-10-22 16:09:33,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2018-10-22 16:09:33,956 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 16:09:33,956 INFO L375 BasicCegarLoop]: trace histogram [18, 17, 17, 3, 3, 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] [2018-10-22 16:09:33,957 INFO L424 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 16:09:33,957 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 16:09:33,957 INFO L82 PathProgramCache]: Analyzing trace with hash 878874932, now seen corresponding path program 1 times [2018-10-22 16:09:33,957 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 16:09:33,958 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 16:09:33,958 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 16:09:33,958 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 16:09:33,958 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 16:09:33,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 16:09:34,113 INFO L134 CoverageAnalysis]: Checked inductivity of 597 backedges. 40 proven. 13 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2018-10-22 16:09:34,113 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 16:09:34,113 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-22 16:09:34,113 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 119 with the following transitions: [2018-10-22 16:09:34,113 INFO L202 CegarAbsIntRunner]: [0], [4], [8], [11], [17], [23], [27], [33], [36], [41], [46], [49], [53], [56], [58], [63], [69], [72], [84], [87], [89], [92], [94], [95], [96], [97], [99], [100], [101], [102], [103], [104], [105], [106], [107], [108], [109], [110], [111], [112], [113], [114], [115], [116], [117], [118], [119], [120], [121], [122] [2018-10-22 16:09:34,114 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-10-22 16:09:34,139 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-22 16:09:34,143 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-10-22 16:09:34,241 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-22 16:09:34,241 INFO L272 AbstractInterpreter]: Visited 50 different actions 435 times. Merged at 23 different actions 83 times. Never widened. Found 10 fixpoints after 2 different actions. Largest state had 16 variables. [2018-10-22 16:09:34,248 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 16:09:34,248 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-22 16:09:34,248 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 16:09:34,248 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 16:09:34,256 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 16:09:34,256 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-22 16:09:34,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 16:09:34,288 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 16:09:34,401 INFO L134 CoverageAnalysis]: Checked inductivity of 597 backedges. 205 proven. 10 refuted. 0 times theorem prover too weak. 382 trivial. 0 not checked. [2018-10-22 16:09:34,401 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 16:09:34,498 INFO L134 CoverageAnalysis]: Checked inductivity of 597 backedges. 40 proven. 13 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2018-10-22 16:09:34,520 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 16:09:34,520 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/cvc4nyu Starting monitored process 22 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-10-22 16:09:34,536 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 16:09:34,537 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-22 16:09:34,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 16:09:34,608 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 16:09:35,141 INFO L134 CoverageAnalysis]: Checked inductivity of 597 backedges. 205 proven. 10 refuted. 0 times theorem prover too weak. 382 trivial. 0 not checked. [2018-10-22 16:09:35,141 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 16:09:35,205 INFO L134 CoverageAnalysis]: Checked inductivity of 597 backedges. 40 proven. 13 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2018-10-22 16:09:35,207 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-10-22 16:09:35,207 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8] total 15 [2018-10-22 16:09:35,207 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-22 16:09:35,207 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-22 16:09:35,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-22 16:09:35,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=164, Unknown=1, NotChecked=0, Total=210 [2018-10-22 16:09:35,208 INFO L87 Difference]: Start difference. First operand 570 states and 898 transitions. Second operand 12 states. [2018-10-22 16:09:40,120 WARN L179 SmtUtils]: Spent 364.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 18 [2018-10-22 16:09:42,532 WARN L179 SmtUtils]: Spent 388.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 20 [2018-10-22 16:09:43,974 WARN L179 SmtUtils]: Spent 451.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 19 [2018-10-22 16:09:44,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 16:09:44,972 INFO L93 Difference]: Finished difference Result 1242 states and 1968 transitions. [2018-10-22 16:09:44,972 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-10-22 16:09:44,972 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 118 [2018-10-22 16:09:44,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 16:09:44,977 INFO L225 Difference]: With dead ends: 1242 [2018-10-22 16:09:44,977 INFO L226 Difference]: Without dead ends: 723 [2018-10-22 16:09:44,980 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 516 GetRequests, 474 SyntacticMatches, 7 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 342 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=357, Invalid=973, Unknown=2, NotChecked=0, Total=1332 [2018-10-22 16:09:44,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 723 states. [2018-10-22 16:09:45,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 723 to 563. [2018-10-22 16:09:45,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 563 states. [2018-10-22 16:09:45,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 563 states to 563 states and 874 transitions. [2018-10-22 16:09:45,156 INFO L78 Accepts]: Start accepts. Automaton has 563 states and 874 transitions. Word has length 118 [2018-10-22 16:09:45,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 16:09:45,157 INFO L481 AbstractCegarLoop]: Abstraction has 563 states and 874 transitions. [2018-10-22 16:09:45,157 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-22 16:09:45,157 INFO L276 IsEmpty]: Start isEmpty. Operand 563 states and 874 transitions. [2018-10-22 16:09:45,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2018-10-22 16:09:45,159 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 16:09:45,159 INFO L375 BasicCegarLoop]: trace histogram [18, 17, 17, 3, 3, 3, 3, 3, 3, 3, 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] [2018-10-22 16:09:45,159 INFO L424 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 16:09:45,160 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 16:09:45,160 INFO L82 PathProgramCache]: Analyzing trace with hash 825139146, now seen corresponding path program 2 times [2018-10-22 16:09:45,160 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 16:09:45,160 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 16:09:45,161 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 16:09:45,161 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 16:09:45,161 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 16:09:45,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 16:09:45,414 INFO L134 CoverageAnalysis]: Checked inductivity of 603 backedges. 33 proven. 74 refuted. 0 times theorem prover too weak. 496 trivial. 0 not checked. [2018-10-22 16:09:45,415 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 16:09:45,415 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-22 16:09:45,415 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-22 16:09:45,415 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-22 16:09:45,415 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 16:09:45,415 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 16:09:45,423 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 16:09:45,423 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-10-22 16:09:45,457 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 16:09:45,457 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 16:09:45,460 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 16:09:45,574 INFO L134 CoverageAnalysis]: Checked inductivity of 603 backedges. 34 proven. 25 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2018-10-22 16:09:45,574 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 16:09:45,783 INFO L134 CoverageAnalysis]: Checked inductivity of 603 backedges. 34 proven. 25 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2018-10-22 16:09:45,804 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 16:09:45,804 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/cvc4nyu Starting monitored process 24 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-10-22 16:09:45,819 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 16:09:45,819 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-10-22 16:09:45,896 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 16:09:45,896 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 16:09:45,901 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 16:09:46,035 INFO L134 CoverageAnalysis]: Checked inductivity of 603 backedges. 34 proven. 25 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2018-10-22 16:09:46,035 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 16:09:46,135 INFO L134 CoverageAnalysis]: Checked inductivity of 603 backedges. 34 proven. 25 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2018-10-22 16:09:46,138 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-10-22 16:09:46,139 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10, 10, 10] total 21 [2018-10-22 16:09:46,139 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-22 16:09:46,139 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-10-22 16:09:46,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-10-22 16:09:46,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2018-10-22 16:09:46,140 INFO L87 Difference]: Start difference. First operand 563 states and 874 transitions. Second operand 16 states. [2018-10-22 16:09:47,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 16:09:47,917 INFO L93 Difference]: Finished difference Result 879 states and 1370 transitions. [2018-10-22 16:09:47,918 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-10-22 16:09:47,918 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 120 [2018-10-22 16:09:47,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 16:09:47,924 INFO L225 Difference]: With dead ends: 879 [2018-10-22 16:09:47,924 INFO L226 Difference]: Without dead ends: 877 [2018-10-22 16:09:47,925 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 503 GetRequests, 465 SyntacticMatches, 7 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=211, Invalid=845, Unknown=0, NotChecked=0, Total=1056 [2018-10-22 16:09:47,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 877 states. [2018-10-22 16:09:48,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 877 to 664. [2018-10-22 16:09:48,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 664 states. [2018-10-22 16:09:48,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 664 states to 664 states and 1041 transitions. [2018-10-22 16:09:48,144 INFO L78 Accepts]: Start accepts. Automaton has 664 states and 1041 transitions. Word has length 120 [2018-10-22 16:09:48,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 16:09:48,144 INFO L481 AbstractCegarLoop]: Abstraction has 664 states and 1041 transitions. [2018-10-22 16:09:48,144 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-10-22 16:09:48,145 INFO L276 IsEmpty]: Start isEmpty. Operand 664 states and 1041 transitions. [2018-10-22 16:09:48,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2018-10-22 16:09:48,147 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 16:09:48,147 INFO L375 BasicCegarLoop]: trace histogram [18, 17, 17, 3, 3, 3, 3, 3, 3, 3, 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] [2018-10-22 16:09:48,148 INFO L424 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 16:09:48,148 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 16:09:48,148 INFO L82 PathProgramCache]: Analyzing trace with hash -902225271, now seen corresponding path program 2 times [2018-10-22 16:09:48,148 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 16:09:48,149 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 16:09:48,149 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 16:09:48,149 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 16:09:48,149 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 16:09:48,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 16:09:48,455 INFO L134 CoverageAnalysis]: Checked inductivity of 608 backedges. 39 proven. 71 refuted. 0 times theorem prover too weak. 498 trivial. 0 not checked. [2018-10-22 16:09:48,456 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 16:09:48,456 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-22 16:09:48,456 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-22 16:09:48,456 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-22 16:09:48,456 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 16:09:48,456 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 16:09:48,468 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 16:09:48,469 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-10-22 16:09:48,502 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 16:09:48,502 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 16:09:48,505 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 16:09:48,725 INFO L134 CoverageAnalysis]: Checked inductivity of 608 backedges. 46 proven. 66 refuted. 0 times theorem prover too weak. 496 trivial. 0 not checked. [2018-10-22 16:09:48,726 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 16:09:49,133 INFO L134 CoverageAnalysis]: Checked inductivity of 608 backedges. 43 proven. 69 refuted. 0 times theorem prover too weak. 496 trivial. 0 not checked. [2018-10-22 16:09:49,156 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 16:09:49,157 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/cvc4nyu Starting monitored process 26 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-10-22 16:09:49,173 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 16:09:49,173 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-10-22 16:09:49,254 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 16:09:49,255 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 16:09:49,260 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 16:09:51,328 INFO L134 CoverageAnalysis]: Checked inductivity of 608 backedges. 40 proven. 22 refuted. 0 times theorem prover too weak. 546 trivial. 0 not checked. [2018-10-22 16:09:51,329 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 16:09:51,896 INFO L134 CoverageAnalysis]: Checked inductivity of 608 backedges. 42 proven. 20 refuted. 0 times theorem prover too weak. 546 trivial. 0 not checked. [2018-10-22 16:09:51,902 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-10-22 16:09:51,902 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14, 13, 10, 10] total 33 [2018-10-22 16:09:51,902 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-22 16:09:51,902 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-10-22 16:09:51,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-10-22 16:09:51,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=882, Unknown=1, NotChecked=0, Total=1056 [2018-10-22 16:09:51,904 INFO L87 Difference]: Start difference. First operand 664 states and 1041 transitions. Second operand 20 states. [2018-10-22 16:09:56,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 16:09:56,437 INFO L93 Difference]: Finished difference Result 901 states and 1399 transitions. [2018-10-22 16:09:56,438 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-10-22 16:09:56,438 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 123 [2018-10-22 16:09:56,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 16:09:56,443 INFO L225 Difference]: With dead ends: 901 [2018-10-22 16:09:56,443 INFO L226 Difference]: Without dead ends: 899 [2018-10-22 16:09:56,444 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 527 GetRequests, 466 SyntacticMatches, 6 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 765 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=750, Invalid=2437, Unknown=5, NotChecked=0, Total=3192 [2018-10-22 16:09:56,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 899 states. [2018-10-22 16:09:56,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 899 to 731. [2018-10-22 16:09:56,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 731 states. [2018-10-22 16:09:56,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 731 states to 731 states and 1158 transitions. [2018-10-22 16:09:56,779 INFO L78 Accepts]: Start accepts. Automaton has 731 states and 1158 transitions. Word has length 123 [2018-10-22 16:09:56,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 16:09:56,779 INFO L481 AbstractCegarLoop]: Abstraction has 731 states and 1158 transitions. [2018-10-22 16:09:56,779 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-10-22 16:09:56,779 INFO L276 IsEmpty]: Start isEmpty. Operand 731 states and 1158 transitions. [2018-10-22 16:09:56,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2018-10-22 16:09:56,782 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 16:09:56,782 INFO L375 BasicCegarLoop]: trace histogram [22, 21, 21, 3, 3, 3, 3, 3, 3, 3, 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] [2018-10-22 16:09:56,783 INFO L424 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 16:09:56,783 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 16:09:56,783 INFO L82 PathProgramCache]: Analyzing trace with hash -769027094, now seen corresponding path program 2 times [2018-10-22 16:09:56,783 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 16:09:56,784 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 16:09:56,784 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 16:09:56,784 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 16:09:56,784 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 16:09:56,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 16:09:57,219 INFO L134 CoverageAnalysis]: Checked inductivity of 913 backedges. 41 proven. 92 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2018-10-22 16:09:57,219 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 16:09:57,219 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-22 16:09:57,219 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-22 16:09:57,220 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-22 16:09:57,220 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 16:09:57,220 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 16:09:57,228 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 16:09:57,229 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-10-22 16:09:57,270 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 16:09:57,270 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 16:09:57,273 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 16:09:57,729 INFO L134 CoverageAnalysis]: Checked inductivity of 913 backedges. 61 proven. 12 refuted. 0 times theorem prover too weak. 840 trivial. 0 not checked. [2018-10-22 16:09:57,730 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 16:09:58,546 INFO L134 CoverageAnalysis]: Checked inductivity of 913 backedges. 42 proven. 31 refuted. 0 times theorem prover too weak. 840 trivial. 0 not checked. [2018-10-22 16:09:58,567 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 16:09:58,567 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/cvc4nyu Starting monitored process 28 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-10-22 16:09:58,584 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 16:09:58,584 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-10-22 16:09:58,675 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 16:09:58,676 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 16:09:58,682 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 16:10:05,067 INFO L134 CoverageAnalysis]: Checked inductivity of 913 backedges. 266 proven. 17 refuted. 0 times theorem prover too weak. 630 trivial. 0 not checked. [2018-10-22 16:10:05,067 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 16:10:07,643 INFO L134 CoverageAnalysis]: Checked inductivity of 913 backedges. 54 proven. 19 refuted. 0 times theorem prover too weak. 840 trivial. 0 not checked. [2018-10-22 16:10:07,645 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-10-22 16:10:07,645 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11, 9, 9] total 41 [2018-10-22 16:10:07,646 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-22 16:10:07,646 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-10-22 16:10:07,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-10-22 16:10:07,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=1473, Unknown=4, NotChecked=0, Total=1640 [2018-10-22 16:10:07,648 INFO L87 Difference]: Start difference. First operand 731 states and 1158 transitions. Second operand 20 states. [2018-10-22 16:10:14,390 WARN L179 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 20 Received shutdown request... [2018-10-22 16:10:43,150 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-10-22 16:10:43,150 WARN L550 AbstractCegarLoop]: Verification canceled [2018-10-22 16:10:43,154 WARN L205 ceAbstractionStarter]: Timeout [2018-10-22 16:10:43,154 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.10 04:10:43 BoogieIcfgContainer [2018-10-22 16:10:43,154 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-22 16:10:43,155 INFO L168 Benchmark]: Toolchain (without parser) took 236387.48 ms. Allocated memory was 1.5 GB in the beginning and 2.8 GB in the end (delta: 1.3 GB). Free memory was 1.4 GB in the beginning and 1.9 GB in the end (delta: -456.7 MB). Peak memory consumption was 819.4 MB. Max. memory is 7.1 GB. [2018-10-22 16:10:43,156 INFO L168 Benchmark]: CDTParser took 0.54 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. [2018-10-22 16:10:43,156 INFO L168 Benchmark]: CACSL2BoogieTranslator took 340.37 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. [2018-10-22 16:10:43,157 INFO L168 Benchmark]: Boogie Procedure Inliner took 26.60 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. [2018-10-22 16:10:43,157 INFO L168 Benchmark]: Boogie Preprocessor took 38.24 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. [2018-10-22 16:10:43,157 INFO L168 Benchmark]: RCFGBuilder took 766.74 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 759.2 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -806.7 MB). Peak memory consumption was 26.7 MB. Max. memory is 7.1 GB. [2018-10-22 16:10:43,158 INFO L168 Benchmark]: TraceAbstraction took 235210.20 ms. Allocated memory was 2.3 GB in the beginning and 2.8 GB in the end (delta: 516.9 MB). Free memory was 2.2 GB in the beginning and 1.9 GB in the end (delta: 339.5 MB). Peak memory consumption was 856.4 MB. Max. memory is 7.1 GB. [2018-10-22 16:10:43,162 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.54 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 340.37 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 26.60 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. * Boogie Preprocessor took 38.24 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. * RCFGBuilder took 766.74 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 759.2 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -806.7 MB). Peak memory consumption was 26.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 235210.20 ms. Allocated memory was 2.3 GB in the beginning and 2.8 GB in the end (delta: 516.9 MB). Free memory was 2.2 GB in the beginning and 1.9 GB in the end (delta: 339.5 MB). Peak memory consumption was 856.4 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 5]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 5). Cancelled while BasicCegarLoop was constructing difference of abstraction (731states) and FLOYD_HOARE automaton (currently 35 states, 20 states before enhancement),while PredicateComparison was comparing new predicate (quantified with 0quantifier alternations) to 71 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 45 locations, 1 error locations. TIMEOUT Result, 235.1s OverallTime, 28 OverallIterations, 22 TraceHistogramMax, 184.6s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 2507 SDtfs, 2755 SDslu, 9789 SDs, 0 SdLazy, 11027 SolverSat, 5957 SolverUnsat, 85 SolverUnknown, 0 SolverNotchecked, 91.2s Time, PredicateUnifierStatistics: 14 DeclaredPredicates, 5353 GetRequests, 4657 SyntacticMatches, 52 SemanticMatches, 643 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5484 ImplicationChecksByTransitivity, 79.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=930occurred in iteration=16, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 1.9s AbstIntTime, 21 AbstIntIterations, 7 AbstIntStrong, 0.8741993136974552 AbsIntWeakeningRatio, 0.6988847583643123 AbsIntAvgWeakeningVarsNumRemoved, 14.680297397769516 AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 4.4s AutomataMinimizationTime, 27 MinimizatonAttempts, 2286 StatesRemovedByMinimization, 25 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.1s SsaConstructionTime, 1.2s SatisfiabilityAnalysisTime, 38.9s InterpolantComputationTime, 4002 NumberOfCodeBlocks, 4002 NumberOfCodeBlocksAsserted, 61 NumberOfCheckSat, 6216 ConstructedInterpolants, 666 QuantifiedInterpolants, 2321358 SizeOfPredicates, 162 NumberOfNonLiveVariables, 4769 ConjunctsInSsa, 275 ConjunctsInUnsatCore, 82 InterpolantComputations, 21 PerfectInterpolantSequences, 23050/24258 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown