/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --abstractinterpretationv2.abstract.domain IntervalDomain --traceabstraction.trace.refinement.strategy TAIPAN --traceabstraction.abstract.interpretation.mode USE_PREDICATES -i ../../../trunk/examples/svcomp/loop-acceleration/nested_1-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-07 00:33:03,571 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-07 00:33:03,574 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-07 00:33:03,586 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-07 00:33:03,603 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-07 00:33:03,603 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-07 00:33:03,606 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-07 00:33:03,607 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-07 00:33:03,609 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-07 00:33:03,610 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-07 00:33:03,614 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-07 00:33:03,616 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-07 00:33:03,617 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-07 00:33:03,621 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-07 00:33:03,622 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-07 00:33:03,624 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-07 00:33:03,627 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-07 00:33:03,640 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-07 00:33:03,640 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-07 00:33:03,641 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-07 00:33:03,642 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-07 00:33:03,671 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-07 00:33:03,671 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-07 00:33:03,674 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-07 00:33:03,674 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-07 00:33:03,674 INFO L138 SettingsManager]: * Use SBE=true [2019-11-07 00:33:03,675 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-07 00:33:03,675 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-07 00:33:03,675 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-07 00:33:03,675 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-07 00:33:03,675 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-07 00:33:03,676 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-07 00:33:03,676 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-07 00:33:03,676 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-07 00:33:03,676 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-07 00:33:03,676 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-07 00:33:03,676 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-07 00:33:03,679 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-07 00:33:03,679 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-07 00:33:03,679 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-07 00:33:03,679 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-07 00:33:03,679 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-07 00:33:03,680 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-07 00:33:03,680 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-07 00:33:03,680 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-07 00:33:03,680 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-07 00:33:03,680 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-07 00:33:03,681 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-07 00:33:03,681 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-07 00:33:03,681 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2: Abstract domain -> IntervalDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Abstract interpretation Mode -> USE_PREDICATES [2019-11-07 00:33:03,978 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-07 00:33:03,999 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-07 00:33:04,002 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-07 00:33:04,004 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-07 00:33:04,004 INFO L275 PluginConnector]: CDTParser initialized [2019-11-07 00:33:04,005 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/nested_1-1.c [2019-11-07 00:33:04,069 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/398291f1a/5352f08d4ffc4a2b87f32a5d2deb6894/FLAG23cc99175 [2019-11-07 00:33:04,460 INFO L306 CDTParser]: Found 1 translation units. [2019-11-07 00:33:04,461 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/nested_1-1.c [2019-11-07 00:33:04,467 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/398291f1a/5352f08d4ffc4a2b87f32a5d2deb6894/FLAG23cc99175 [2019-11-07 00:33:04,837 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/398291f1a/5352f08d4ffc4a2b87f32a5d2deb6894 [2019-11-07 00:33:04,845 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-07 00:33:04,847 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-07 00:33:04,848 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-07 00:33:04,848 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-07 00:33:04,851 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-07 00:33:04,852 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 12:33:04" (1/1) ... [2019-11-07 00:33:04,855 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4b9585f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:33:04, skipping insertion in model container [2019-11-07 00:33:04,856 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 12:33:04" (1/1) ... [2019-11-07 00:33:04,863 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-07 00:33:04,879 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-07 00:33:05,053 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 00:33:05,057 INFO L188 MainTranslator]: Completed pre-run [2019-11-07 00:33:05,085 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 00:33:05,101 INFO L192 MainTranslator]: Completed translation [2019-11-07 00:33:05,102 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:33:05 WrapperNode [2019-11-07 00:33:05,102 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-07 00:33:05,103 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-07 00:33:05,103 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-07 00:33:05,103 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-07 00:33:05,119 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:33:05" (1/1) ... [2019-11-07 00:33:05,119 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:33:05" (1/1) ... [2019-11-07 00:33:05,246 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:33:05" (1/1) ... [2019-11-07 00:33:05,247 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:33:05" (1/1) ... [2019-11-07 00:33:05,251 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:33:05" (1/1) ... [2019-11-07 00:33:05,257 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:33:05" (1/1) ... [2019-11-07 00:33:05,258 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:33:05" (1/1) ... [2019-11-07 00:33:05,265 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-07 00:33:05,265 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-07 00:33:05,266 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-07 00:33:05,266 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-07 00:33:05,267 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:33:05" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-07 00:33:05,333 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-07 00:33:05,333 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-07 00:33:05,333 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-11-07 00:33:05,333 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-07 00:33:05,333 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-07 00:33:05,334 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-11-07 00:33:05,335 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-07 00:33:05,335 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-07 00:33:05,336 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-07 00:33:05,536 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-07 00:33:05,536 INFO L284 CfgBuilder]: Removed 2 assume(true) statements. [2019-11-07 00:33:05,537 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 12:33:05 BoogieIcfgContainer [2019-11-07 00:33:05,538 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-07 00:33:05,539 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-07 00:33:05,539 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-07 00:33:05,542 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-07 00:33:05,542 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 12:33:04" (1/3) ... [2019-11-07 00:33:05,543 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7aa1a6a4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 12:33:05, skipping insertion in model container [2019-11-07 00:33:05,543 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:33:05" (2/3) ... [2019-11-07 00:33:05,544 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7aa1a6a4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 12:33:05, skipping insertion in model container [2019-11-07 00:33:05,544 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 12:33:05" (3/3) ... [2019-11-07 00:33:05,546 INFO L109 eAbstractionObserver]: Analyzing ICFG nested_1-1.c [2019-11-07 00:33:05,554 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-07 00:33:05,561 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-07 00:33:05,571 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-07 00:33:05,598 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-07 00:33:05,598 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-07 00:33:05,598 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-07 00:33:05,599 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-07 00:33:05,600 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-07 00:33:05,600 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-07 00:33:05,600 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-07 00:33:05,601 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-07 00:33:05,624 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2019-11-07 00:33:05,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-07 00:33:05,629 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:33:05,630 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:33:05,631 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:33:05,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:33:05,636 INFO L82 PathProgramCache]: Analyzing trace with hash -873786703, now seen corresponding path program 1 times [2019-11-07 00:33:05,643 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:33:05,644 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670117076] [2019-11-07 00:33:05,644 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:33:05,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:33:05,890 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 00:33:05,891 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670117076] [2019-11-07 00:33:05,892 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 00:33:05,892 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-07 00:33:05,894 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275048754] [2019-11-07 00:33:05,913 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-07 00:33:05,918 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:33:05,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-07 00:33:05,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-07 00:33:05,945 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 3 states. [2019-11-07 00:33:05,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:33:05,990 INFO L93 Difference]: Finished difference Result 36 states and 49 transitions. [2019-11-07 00:33:05,990 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-07 00:33:05,992 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2019-11-07 00:33:05,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:33:06,001 INFO L225 Difference]: With dead ends: 36 [2019-11-07 00:33:06,001 INFO L226 Difference]: Without dead ends: 16 [2019-11-07 00:33:06,004 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-07 00:33:06,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2019-11-07 00:33:06,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 14. [2019-11-07 00:33:06,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2019-11-07 00:33:06,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2019-11-07 00:33:06,040 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 10 [2019-11-07 00:33:06,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:33:06,040 INFO L462 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2019-11-07 00:33:06,041 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-07 00:33:06,041 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2019-11-07 00:33:06,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-11-07 00:33:06,042 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:33:06,042 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:33:06,042 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:33:06,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:33:06,043 INFO L82 PathProgramCache]: Analyzing trace with hash 1621360120, now seen corresponding path program 1 times [2019-11-07 00:33:06,043 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:33:06,043 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32470421] [2019-11-07 00:33:06,044 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:33:06,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:33:06,132 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 00:33:06,133 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32470421] [2019-11-07 00:33:06,133 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 00:33:06,133 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-07 00:33:06,134 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2147279166] [2019-11-07 00:33:06,135 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-07 00:33:06,136 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:33:06,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-07 00:33:06,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-07 00:33:06,137 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 3 states. [2019-11-07 00:33:06,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:33:06,150 INFO L93 Difference]: Finished difference Result 23 states and 26 transitions. [2019-11-07 00:33:06,151 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-07 00:33:06,151 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2019-11-07 00:33:06,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:33:06,152 INFO L225 Difference]: With dead ends: 23 [2019-11-07 00:33:06,152 INFO L226 Difference]: Without dead ends: 15 [2019-11-07 00:33:06,153 INFO L630 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 [2019-11-07 00:33:06,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2019-11-07 00:33:06,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2019-11-07 00:33:06,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2019-11-07 00:33:06,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2019-11-07 00:33:06,159 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 13 [2019-11-07 00:33:06,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:33:06,159 INFO L462 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2019-11-07 00:33:06,159 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-07 00:33:06,159 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2019-11-07 00:33:06,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-11-07 00:33:06,160 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:33:06,160 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:33:06,160 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:33:06,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:33:06,161 INFO L82 PathProgramCache]: Analyzing trace with hash 1574756514, now seen corresponding path program 1 times [2019-11-07 00:33:06,161 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:33:06,161 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879421345] [2019-11-07 00:33:06,162 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:33:06,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:33:06,254 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 00:33:06,255 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879421345] [2019-11-07 00:33:06,255 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2007825616] [2019-11-07 00:33:06,256 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:33:06,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:33:06,292 INFO L256 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-07 00:33:06,299 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:33:06,346 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 00:33:06,347 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:33:06,395 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-07 00:33:06,395 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [995094089] [2019-11-07 00:33:06,401 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 15 [2019-11-07 00:33:06,462 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-11-07 00:33:06,463 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-11-07 00:33:06,511 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-11-07 00:33:06,870 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-11-07 00:33:06,876 INFO L272 AbstractInterpreter]: Visited 14 different actions 110 times. Merged at 5 different actions 44 times. Widened at 3 different actions 17 times. Performed 231 root evaluator evaluations with a maximum evaluation depth of 12. Performed 231 inverse root evaluator evaluations with a maximum inverse evaluation depth of 12. Found 14 fixpoints after 3 different actions. Largest state had 4 variables. [2019-11-07 00:33:06,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:33:06,881 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-07 00:33:06,882 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-11-07 00:33:06,883 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 4] total 9 [2019-11-07 00:33:06,884 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503047371] [2019-11-07 00:33:06,886 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-07 00:33:06,886 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:33:06,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-07 00:33:06,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-11-07 00:33:06,895 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 9 states. [2019-11-07 00:33:07,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:33:07,175 INFO L93 Difference]: Finished difference Result 40 states and 52 transitions. [2019-11-07 00:33:07,176 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-11-07 00:33:07,177 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 14 [2019-11-07 00:33:07,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:33:07,178 INFO L225 Difference]: With dead ends: 40 [2019-11-07 00:33:07,178 INFO L226 Difference]: Without dead ends: 31 [2019-11-07 00:33:07,179 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=95, Invalid=177, Unknown=0, NotChecked=0, Total=272 [2019-11-07 00:33:07,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2019-11-07 00:33:07,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2019-11-07 00:33:07,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-11-07 00:33:07,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2019-11-07 00:33:07,192 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 14 [2019-11-07 00:33:07,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:33:07,192 INFO L462 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2019-11-07 00:33:07,193 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-07 00:33:07,193 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2019-11-07 00:33:07,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-11-07 00:33:07,196 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:33:07,197 INFO L410 BasicCegarLoop]: trace histogram [8, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:33:07,404 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:33:07,404 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:33:07,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:33:07,405 INFO L82 PathProgramCache]: Analyzing trace with hash 1465881457, now seen corresponding path program 2 times [2019-11-07 00:33:07,405 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:33:07,405 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760516869] [2019-11-07 00:33:07,406 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:33:07,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:33:07,545 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 31 proven. 3 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2019-11-07 00:33:07,546 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760516869] [2019-11-07 00:33:07,546 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [656631200] [2019-11-07 00:33:07,546 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:33:07,610 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2019-11-07 00:33:07,610 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-07 00:33:07,612 INFO L256 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-07 00:33:07,615 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:33:07,645 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 34 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2019-11-07 00:33:07,646 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:33:07,697 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 34 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2019-11-07 00:33:07,697 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [1552998953] [2019-11-07 00:33:07,698 INFO L195 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-11-07 00:33:07,698 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-11-07 00:33:07,698 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-11-07 00:33:07,698 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2019-11-07 00:33:07,699 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884497900] [2019-11-07 00:33:07,699 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-07 00:33:07,699 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:33:07,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-07 00:33:07,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2019-11-07 00:33:07,700 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand 9 states. [2019-11-07 00:33:07,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:33:07,824 INFO L93 Difference]: Finished difference Result 69 states and 92 transitions. [2019-11-07 00:33:07,825 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-07 00:33:07,825 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 30 [2019-11-07 00:33:07,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:33:07,826 INFO L225 Difference]: With dead ends: 69 [2019-11-07 00:33:07,826 INFO L226 Difference]: Without dead ends: 47 [2019-11-07 00:33:07,827 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=62, Unknown=0, NotChecked=0, Total=110 [2019-11-07 00:33:07,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2019-11-07 00:33:07,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2019-11-07 00:33:07,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2019-11-07 00:33:07,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 51 transitions. [2019-11-07 00:33:07,837 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 51 transitions. Word has length 30 [2019-11-07 00:33:07,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:33:07,837 INFO L462 AbstractCegarLoop]: Abstraction has 47 states and 51 transitions. [2019-11-07 00:33:07,838 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-07 00:33:07,838 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 51 transitions. [2019-11-07 00:33:07,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2019-11-07 00:33:07,839 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:33:07,839 INFO L410 BasicCegarLoop]: trace histogram [24, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:33:08,051 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:33:08,052 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:33:08,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:33:08,052 INFO L82 PathProgramCache]: Analyzing trace with hash -649475471, now seen corresponding path program 3 times [2019-11-07 00:33:08,052 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:33:08,053 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922580903] [2019-11-07 00:33:08,053 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:33:08,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:33:08,292 INFO L134 CoverageAnalysis]: Checked inductivity of 394 backedges. 151 proven. 21 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2019-11-07 00:33:08,293 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922580903] [2019-11-07 00:33:08,293 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1388114495] [2019-11-07 00:33:08,293 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:33:08,354 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-07 00:33:08,355 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-07 00:33:08,356 INFO L256 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 22 conjunts are in the unsatisfiable core [2019-11-07 00:33:08,359 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:33:08,569 INFO L134 CoverageAnalysis]: Checked inductivity of 394 backedges. 0 proven. 330 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2019-11-07 00:33:08,570 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:33:09,073 INFO L134 CoverageAnalysis]: Checked inductivity of 394 backedges. 10 proven. 320 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2019-11-07 00:33:09,073 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [587705335] [2019-11-07 00:33:09,073 INFO L195 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-11-07 00:33:09,074 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-11-07 00:33:09,074 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-11-07 00:33:09,074 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 12, 12] total 29 [2019-11-07 00:33:09,074 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043966170] [2019-11-07 00:33:09,076 INFO L442 AbstractCegarLoop]: Interpolant automaton has 29 states [2019-11-07 00:33:09,076 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:33:09,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2019-11-07 00:33:09,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=631, Unknown=0, NotChecked=0, Total=812 [2019-11-07 00:33:09,078 INFO L87 Difference]: Start difference. First operand 47 states and 51 transitions. Second operand 29 states. [2019-11-07 00:33:10,570 WARN L191 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 14 [2019-11-07 00:33:11,478 WARN L191 SmtUtils]: Spent 306.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 14 [2019-11-07 00:33:11,703 WARN L191 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 14 [2019-11-07 00:33:12,517 WARN L191 SmtUtils]: Spent 763.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 14 [2019-11-07 00:33:14,814 WARN L191 SmtUtils]: Spent 2.24 s on a formula simplification. DAG size of input: 25 DAG size of output: 13 [2019-11-07 00:33:15,324 WARN L191 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 14 [2019-11-07 00:33:17,515 WARN L838 $PredicateComparison]: unable to prove that (and (< 0 (+ (div c_main_~y~0 4294967296) 1)) (<= c_main_~y~0 6) (< (mod c_main_~x~0 4294967296) 268435455) (< (mod (+ c_main_~x~0 3) 4294967296) 268435455) (< (mod (+ c_main_~x~0 1) 4294967296) 268435455) (< (mod (+ c_main_~x~0 2) 4294967296) 268435455) (< (mod (+ c_main_~x~0 4) 4294967296) 268435455)) is different from false [2019-11-07 00:33:26,319 WARN L191 SmtUtils]: Spent 2.13 s on a formula simplification. DAG size of input: 20 DAG size of output: 12 [2019-11-07 00:33:28,928 WARN L191 SmtUtils]: Spent 2.10 s on a formula simplification. DAG size of input: 22 DAG size of output: 14 [2019-11-07 00:33:35,637 WARN L191 SmtUtils]: Spent 2.23 s on a formula simplification. DAG size of input: 21 DAG size of output: 14 [2019-11-07 00:33:42,158 WARN L191 SmtUtils]: Spent 2.46 s on a formula simplification. DAG size of input: 21 DAG size of output: 14