java -Xss4m -Xmx6000000000 -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml --generate-csv --csv-dir ../../../releaseScripts/default/UAutomizer-linux/csv -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default.epf -i ../../../trunk/examples/svcomp/loop-crafted/simple_array_index_value_true-unreach-call3_true-termination.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-71425fa [2018-07-20 21:44:57,243 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-07-20 21:44:57,245 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-07-20 21:44:57,260 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-07-20 21:44:57,261 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-07-20 21:44:57,262 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-07-20 21:44:57,263 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-07-20 21:44:57,265 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-07-20 21:44:57,267 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-07-20 21:44:57,267 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-07-20 21:44:57,270 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-07-20 21:44:57,270 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-07-20 21:44:57,271 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-07-20 21:44:57,272 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-07-20 21:44:57,273 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-07-20 21:44:57,274 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-07-20 21:44:57,275 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-07-20 21:44:57,277 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-07-20 21:44:57,281 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-07-20 21:44:57,283 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-07-20 21:44:57,284 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-07-20 21:44:57,285 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-07-20 21:44:57,292 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-07-20 21:44:57,300 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default.epf [2018-07-20 21:44:57,315 INFO L110 SettingsManager]: Loading preferences was successful [2018-07-20 21:44:57,315 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-07-20 21:44:57,316 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-07-20 21:44:57,316 INFO L133 SettingsManager]: * User list type=DISABLED [2018-07-20 21:44:57,316 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-07-20 21:44:57,316 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-07-20 21:44:57,316 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-07-20 21:44:57,320 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-07-20 21:44:57,320 INFO L133 SettingsManager]: * Log string format=TERM [2018-07-20 21:44:57,320 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-07-20 21:44:57,321 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-07-20 21:44:57,321 INFO L133 SettingsManager]: * Interval Domain=false [2018-07-20 21:44:57,322 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-07-20 21:44:57,322 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-07-20 21:44:57,322 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-07-20 21:44:57,322 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-07-20 21:44:57,322 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-07-20 21:44:57,322 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-07-20 21:44:57,323 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-07-20 21:44:57,323 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-07-20 21:44:57,323 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-07-20 21:44:57,323 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-07-20 21:44:57,323 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-07-20 21:44:57,324 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-07-20 21:44:57,324 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-07-20 21:44:57,324 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-07-20 21:44:57,324 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-07-20 21:44:57,324 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-07-20 21:44:57,325 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-07-20 21:44:57,325 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-07-20 21:44:57,325 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-07-20 21:44:57,325 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-07-20 21:44:57,325 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-07-20 21:44:57,326 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-07-20 21:44:57,326 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-07-20 21:44:57,385 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-07-20 21:44:57,402 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-07-20 21:44:57,407 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-07-20 21:44:57,410 INFO L271 PluginConnector]: Initializing CDTParser... [2018-07-20 21:44:57,411 INFO L276 PluginConnector]: CDTParser initialized [2018-07-20 21:44:57,412 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-crafted/simple_array_index_value_true-unreach-call3_true-termination.i [2018-07-20 21:44:57,769 INFO L220 CDTParser]: Created temporary CDT project at /storage/ultimate/releaseScripts/default/UAutomizer-linux/data/3b3b20c27/46b6314e5b01452999b7135a465b938b/FLAG37bc691db [2018-07-20 21:44:57,948 INFO L276 CDTParser]: Found 1 translation units. [2018-07-20 21:44:57,949 INFO L158 CDTParser]: Scanning /storage/ultimate/trunk/examples/svcomp/loop-crafted/simple_array_index_value_true-unreach-call3_true-termination.i [2018-07-20 21:44:57,956 INFO L324 CDTParser]: About to delete temporary CDT project at /storage/ultimate/releaseScripts/default/UAutomizer-linux/data/3b3b20c27/46b6314e5b01452999b7135a465b938b/FLAG37bc691db [2018-07-20 21:44:57,971 INFO L332 CDTParser]: Successfully deleted /storage/ultimate/releaseScripts/default/UAutomizer-linux/data/3b3b20c27/46b6314e5b01452999b7135a465b938b [2018-07-20 21:44:57,979 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-07-20 21:44:57,986 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-07-20 21:44:57,988 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-07-20 21:44:57,992 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-07-20 21:44:58,000 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-07-20 21:44:58,001 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 09:44:57" (1/1) ... [2018-07-20 21:44:58,004 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2e40129b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:44:58, skipping insertion in model container [2018-07-20 21:44:58,004 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 09:44:57" (1/1) ... [2018-07-20 21:44:58,158 INFO L179 PRDispatcher]: Starting pre-run dispatcher in SV-COMP mode [2018-07-20 21:44:58,201 INFO L175 PostProcessor]: Settings: Checked method=main [2018-07-20 21:44:58,218 INFO L422 MainDispatcher]: Starting main dispatcher in SV-COMP mode [2018-07-20 21:44:58,229 INFO L175 PostProcessor]: Settings: Checked method=main [2018-07-20 21:44:58,244 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:44:58 WrapperNode [2018-07-20 21:44:58,244 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-07-20 21:44:58,247 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-07-20 21:44:58,247 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-07-20 21:44:58,248 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-07-20 21:44:58,258 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:44:58" (1/1) ... [2018-07-20 21:44:58,265 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:44:58" (1/1) ... [2018-07-20 21:44:58,273 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-07-20 21:44:58,273 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-07-20 21:44:58,274 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-07-20 21:44:58,274 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-07-20 21:44:58,288 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:44:58" (1/1) ... [2018-07-20 21:44:58,288 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:44:58" (1/1) ... [2018-07-20 21:44:58,289 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:44:58" (1/1) ... [2018-07-20 21:44:58,289 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:44:58" (1/1) ... [2018-07-20 21:44:58,291 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:44:58" (1/1) ... [2018-07-20 21:44:58,299 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:44:58" (1/1) ... [2018-07-20 21:44:58,300 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:44:58" (1/1) ... [2018-07-20 21:44:58,301 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-07-20 21:44:58,302 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-07-20 21:44:58,302 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-07-20 21:44:58,303 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-07-20 21:44:58,304 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:44:58" (1/1) ... No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-07-20 21:44:58,377 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-07-20 21:44:58,377 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-07-20 21:44:58,377 INFO L130 BoogieDeclarations]: Found specification of procedure __U_MULTI_f_storage_ultimate_trunk_examples_svcomp_loop_crafted_simple_array_index_value_true_unreach_call__true_termination_i____VERIFIER_assert [2018-07-20 21:44:58,377 INFO L138 BoogieDeclarations]: Found implementation of procedure __U_MULTI_f_storage_ultimate_trunk_examples_svcomp_loop_crafted_simple_array_index_value_true_unreach_call__true_termination_i____VERIFIER_assert [2018-07-20 21:44:58,377 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-07-20 21:44:58,377 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-07-20 21:44:58,378 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-07-20 21:44:58,379 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-07-20 21:44:58,858 INFO L261 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-07-20 21:44:58,859 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 09:44:58 BoogieIcfgContainer [2018-07-20 21:44:58,859 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-07-20 21:44:58,860 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-07-20 21:44:58,861 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-07-20 21:44:58,871 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-07-20 21:44:58,871 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 09:44:57" (1/3) ... [2018-07-20 21:44:58,872 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5353b0a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 09:44:58, skipping insertion in model container [2018-07-20 21:44:58,872 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:44:58" (2/3) ... [2018-07-20 21:44:58,882 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5353b0a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 09:44:58, skipping insertion in model container [2018-07-20 21:44:58,882 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 09:44:58" (3/3) ... [2018-07-20 21:44:58,884 INFO L112 eAbstractionObserver]: Analyzing ICFG simple_array_index_value_true-unreach-call3_true-termination.i [2018-07-20 21:44:58,901 INFO L132 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-07-20 21:44:58,919 INFO L144 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-07-20 21:44:58,977 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2018-07-20 21:44:58,978 INFO L373 AbstractCegarLoop]: Interprodecural is true [2018-07-20 21:44:58,978 INFO L374 AbstractCegarLoop]: Hoare is true [2018-07-20 21:44:58,978 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-07-20 21:44:58,978 INFO L376 AbstractCegarLoop]: Backedges is TWOTRACK [2018-07-20 21:44:58,978 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-07-20 21:44:58,978 INFO L378 AbstractCegarLoop]: Difference is false [2018-07-20 21:44:58,978 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-07-20 21:44:58,979 INFO L384 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-07-20 21:44:58,997 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2018-07-20 21:44:59,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-07-20 21:44:59,005 INFO L350 BasicCegarLoop]: Found error trace [2018-07-20 21:44:59,006 INFO L358 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-20 21:44:59,006 INFO L414 AbstractCegarLoop]: === Iteration 1 === [__U_MULTI_f_storage_ultimate_trunk_examples_svcomp_loop_crafted_simple_array_index_value_true_unreach_call__true_termination_i____VERIFIER_assertErr0AssertViolationERROR_FUNCTION]=== [2018-07-20 21:44:59,012 INFO L82 PathProgramCache]: Analyzing trace with hash -1098901645, now seen corresponding path program 1 times [2018-07-20 21:44:59,017 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-07-20 21:44:59,070 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-20 21:44:59,070 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-20 21:44:59,070 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-20 21:44:59,071 INFO L282 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-20 21:44:59,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-20 21:44:59,143 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-20 21:44:59,147 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-20 21:44:59,147 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-07-20 21:44:59,147 INFO L254 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-20 21:44:59,149 INFO L450 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-07-20 21:44:59,159 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-07-20 21:44:59,160 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-07-20 21:44:59,162 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 2 states. [2018-07-20 21:44:59,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-20 21:44:59,182 INFO L93 Difference]: Finished difference Result 37 states and 44 transitions. [2018-07-20 21:44:59,182 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-07-20 21:44:59,183 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 13 [2018-07-20 21:44:59,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-20 21:44:59,191 INFO L225 Difference]: With dead ends: 37 [2018-07-20 21:44:59,192 INFO L226 Difference]: Without dead ends: 18 [2018-07-20 21:44:59,195 INFO L578 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 [2018-07-20 21:44:59,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-07-20 21:44:59,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2018-07-20 21:44:59,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-07-20 21:44:59,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2018-07-20 21:44:59,241 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2018-07-20 21:44:59,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-20 21:44:59,241 INFO L471 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2018-07-20 21:44:59,241 INFO L472 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-07-20 21:44:59,241 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2018-07-20 21:44:59,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-07-20 21:44:59,242 INFO L350 BasicCegarLoop]: Found error trace [2018-07-20 21:44:59,242 INFO L358 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-20 21:44:59,243 INFO L414 AbstractCegarLoop]: === Iteration 2 === [__U_MULTI_f_storage_ultimate_trunk_examples_svcomp_loop_crafted_simple_array_index_value_true_unreach_call__true_termination_i____VERIFIER_assertErr0AssertViolationERROR_FUNCTION]=== [2018-07-20 21:44:59,243 INFO L82 PathProgramCache]: Analyzing trace with hash 593775156, now seen corresponding path program 1 times [2018-07-20 21:44:59,243 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-07-20 21:44:59,244 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-20 21:44:59,244 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-20 21:44:59,245 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-20 21:44:59,245 INFO L282 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-20 21:44:59,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-20 21:44:59,349 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-20 21:44:59,349 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-20 21:44:59,350 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-07-20 21:44:59,350 INFO L254 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-20 21:44:59,351 INFO L450 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-07-20 21:44:59,354 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-07-20 21:44:59,354 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-07-20 21:44:59,355 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 3 states. [2018-07-20 21:44:59,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-20 21:44:59,408 INFO L93 Difference]: Finished difference Result 35 states and 38 transitions. [2018-07-20 21:44:59,409 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-07-20 21:44:59,409 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 14 [2018-07-20 21:44:59,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-20 21:44:59,411 INFO L225 Difference]: With dead ends: 35 [2018-07-20 21:44:59,412 INFO L226 Difference]: Without dead ends: 24 [2018-07-20 21:44:59,413 INFO L578 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 [2018-07-20 21:44:59,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-07-20 21:44:59,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 20. [2018-07-20 21:44:59,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-07-20 21:44:59,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2018-07-20 21:44:59,425 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 14 [2018-07-20 21:44:59,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-20 21:44:59,425 INFO L471 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2018-07-20 21:44:59,426 INFO L472 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-07-20 21:44:59,426 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2018-07-20 21:44:59,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-07-20 21:44:59,426 INFO L350 BasicCegarLoop]: Found error trace [2018-07-20 21:44:59,426 INFO L358 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-20 21:44:59,427 INFO L414 AbstractCegarLoop]: === Iteration 3 === [__U_MULTI_f_storage_ultimate_trunk_examples_svcomp_loop_crafted_simple_array_index_value_true_unreach_call__true_termination_i____VERIFIER_assertErr0AssertViolationERROR_FUNCTION]=== [2018-07-20 21:44:59,427 INFO L82 PathProgramCache]: Analyzing trace with hash -208069298, now seen corresponding path program 1 times [2018-07-20 21:44:59,427 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-07-20 21:44:59,428 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-20 21:44:59,428 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-20 21:44:59,428 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-20 21:44:59,428 INFO L282 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-20 21:44:59,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-20 21:44:59,532 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-20 21:44:59,532 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-20 21:44:59,533 INFO L189 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-07-20 21:44:59,534 INFO L199 CegarAbsIntRunner]: Running AI on error trace of length 17 with the following transitions: [2018-07-20 21:44:59,536 INFO L201 CegarAbsIntRunner]: [0], [1], [4], [6], [15], [19], [23], [25], [29], [33], [38], [46], [47], [48], [50] [2018-07-20 21:44:59,585 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-07-20 21:44:59,586 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-07-20 21:44:59,710 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-07-20 21:45:00,016 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-07-20 21:45:00,020 INFO L272 AbstractInterpreter]: Visited 15 different actions 95 times. Merged at 6 different actions 49 times. Widened at 2 different actions 9 times. Found 2 fixpoints after 2 different actions. Largest state had 3 variables. [2018-07-20 21:45:00,046 INFO L419 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-07-20 21:45:00,046 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-20 21:45:00,046 INFO L189 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-20 21:45:00,058 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-20 21:45:00,059 INFO L282 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-20 21:45:00,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-20 21:45:00,098 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-20 21:45:00,176 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2018-07-20 21:45:00,178 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-07-20 21:45:00,188 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-07-20 21:45:00,188 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2018-07-20 21:45:00,361 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-20 21:45:00,361 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-20 21:45:00,796 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2018-07-20 21:45:00,798 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-07-20 21:45:00,803 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2018-07-20 21:45:00,804 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:12, output treesize:11 [2018-07-20 21:45:00,842 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-20 21:45:00,864 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-20 21:45:00,864 INFO L189 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 3 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 3 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-20 21:45:00,879 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-20 21:45:00,880 INFO L282 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-20 21:45:00,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-20 21:45:00,901 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-20 21:45:00,910 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-20 21:45:00,910 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-20 21:45:01,121 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-20 21:45:01,125 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-20 21:45:01,125 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 7, 7, 4, 4] total 16 [2018-07-20 21:45:01,125 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-20 21:45:01,126 INFO L450 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-07-20 21:45:01,126 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-07-20 21:45:01,126 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2018-07-20 21:45:01,127 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 9 states. [2018-07-20 21:45:01,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-20 21:45:01,288 INFO L93 Difference]: Finished difference Result 60 states and 68 transitions. [2018-07-20 21:45:01,289 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-07-20 21:45:01,289 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 16 [2018-07-20 21:45:01,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-20 21:45:01,290 INFO L225 Difference]: With dead ends: 60 [2018-07-20 21:45:01,291 INFO L226 Difference]: Without dead ends: 49 [2018-07-20 21:45:01,293 INFO L578 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2018-07-20 21:45:01,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-07-20 21:45:01,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 32. [2018-07-20 21:45:01,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-07-20 21:45:01,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2018-07-20 21:45:01,301 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 16 [2018-07-20 21:45:01,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-20 21:45:01,302 INFO L471 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2018-07-20 21:45:01,302 INFO L472 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-07-20 21:45:01,302 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2018-07-20 21:45:01,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-07-20 21:45:01,303 INFO L350 BasicCegarLoop]: Found error trace [2018-07-20 21:45:01,303 INFO L358 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-20 21:45:01,303 INFO L414 AbstractCegarLoop]: === Iteration 4 === [__U_MULTI_f_storage_ultimate_trunk_examples_svcomp_loop_crafted_simple_array_index_value_true_unreach_call__true_termination_i____VERIFIER_assertErr0AssertViolationERROR_FUNCTION]=== [2018-07-20 21:45:01,303 INFO L82 PathProgramCache]: Analyzing trace with hash -1092139006, now seen corresponding path program 2 times [2018-07-20 21:45:01,303 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-07-20 21:45:01,304 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-20 21:45:01,304 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-20 21:45:01,304 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-20 21:45:01,305 INFO L282 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-20 21:45:01,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-20 21:45:01,796 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-20 21:45:01,796 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-20 21:45:01,796 INFO L189 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-07-20 21:45:01,796 INFO L183 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-07-20 21:45:01,797 INFO L419 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-07-20 21:45:01,797 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-20 21:45:01,797 INFO L189 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-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 [2018-07-20 21:45:01,817 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-07-20 21:45:01,817 INFO L282 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-07-20 21:45:01,832 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-07-20 21:45:01,832 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-20 21:45:01,835 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-20 21:45:01,864 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-20 21:45:01,865 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-20 21:45:02,072 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-20 21:45:02,093 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-20 21:45:02,093 INFO L189 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-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 [2018-07-20 21:45:02,109 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-07-20 21:45:02,109 INFO L282 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-07-20 21:45:02,139 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-07-20 21:45:02,139 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-20 21:45:02,143 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-20 21:45:02,155 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-20 21:45:02,156 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-20 21:45:02,162 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-20 21:45:02,164 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-20 21:45:02,164 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 6] total 10 [2018-07-20 21:45:02,164 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-20 21:45:02,165 INFO L450 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-07-20 21:45:02,165 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-07-20 21:45:02,165 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2018-07-20 21:45:02,165 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand 6 states. [2018-07-20 21:45:02,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-20 21:45:02,261 INFO L93 Difference]: Finished difference Result 61 states and 68 transitions. [2018-07-20 21:45:02,262 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-07-20 21:45:02,262 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 20 [2018-07-20 21:45:02,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-20 21:45:02,263 INFO L225 Difference]: With dead ends: 61 [2018-07-20 21:45:02,263 INFO L226 Difference]: Without dead ends: 42 [2018-07-20 21:45:02,263 INFO L578 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 74 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2018-07-20 21:45:02,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-07-20 21:45:02,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 26. [2018-07-20 21:45:02,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-07-20 21:45:02,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2018-07-20 21:45:02,269 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 20 [2018-07-20 21:45:02,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-20 21:45:02,270 INFO L471 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2018-07-20 21:45:02,270 INFO L472 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-07-20 21:45:02,270 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2018-07-20 21:45:02,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-07-20 21:45:02,271 INFO L350 BasicCegarLoop]: Found error trace [2018-07-20 21:45:02,271 INFO L358 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-20 21:45:02,271 INFO L414 AbstractCegarLoop]: === Iteration 5 === [__U_MULTI_f_storage_ultimate_trunk_examples_svcomp_loop_crafted_simple_array_index_value_true_unreach_call__true_termination_i____VERIFIER_assertErr0AssertViolationERROR_FUNCTION]=== [2018-07-20 21:45:02,271 INFO L82 PathProgramCache]: Analyzing trace with hash -1168908388, now seen corresponding path program 3 times [2018-07-20 21:45:02,271 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-07-20 21:45:02,272 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-20 21:45:02,272 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-20 21:45:02,272 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-20 21:45:02,272 INFO L282 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-20 21:45:02,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-20 21:45:02,403 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-20 21:45:02,403 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-20 21:45:02,403 INFO L189 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-07-20 21:45:02,403 INFO L183 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-07-20 21:45:02,403 INFO L419 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-07-20 21:45:02,403 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-20 21:45:02,403 INFO L189 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-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 [2018-07-20 21:45:02,413 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-07-20 21:45:02,413 INFO L282 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-07-20 21:45:02,447 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2018-07-20 21:45:02,448 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-20 21:45:02,450 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-20 21:45:02,470 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-20 21:45:02,470 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-20 21:45:02,618 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-20 21:45:02,639 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-20 21:45:02,639 INFO L189 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 7 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 7 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-20 21:45:02,656 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-07-20 21:45:02,656 INFO L282 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-07-20 21:45:02,728 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2018-07-20 21:45:02,728 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-20 21:45:02,734 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-20 21:45:02,761 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-20 21:45:02,761 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-20 21:45:02,770 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-20 21:45:02,772 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-20 21:45:02,772 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 7] total 12 [2018-07-20 21:45:02,772 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-20 21:45:02,773 INFO L450 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-07-20 21:45:02,773 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-07-20 21:45:02,773 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2018-07-20 21:45:02,774 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand 7 states. [2018-07-20 21:45:02,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-20 21:45:02,974 INFO L93 Difference]: Finished difference Result 59 states and 66 transitions. [2018-07-20 21:45:02,975 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-07-20 21:45:02,975 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 22 [2018-07-20 21:45:02,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-20 21:45:02,976 INFO L225 Difference]: With dead ends: 59 [2018-07-20 21:45:02,976 INFO L226 Difference]: Without dead ends: 48 [2018-07-20 21:45:02,977 INFO L578 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 81 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2018-07-20 21:45:02,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2018-07-20 21:45:02,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 28. [2018-07-20 21:45:02,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-07-20 21:45:02,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2018-07-20 21:45:02,983 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 22 [2018-07-20 21:45:02,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-20 21:45:02,983 INFO L471 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2018-07-20 21:45:02,984 INFO L472 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-07-20 21:45:02,984 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2018-07-20 21:45:02,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-07-20 21:45:02,985 INFO L350 BasicCegarLoop]: Found error trace [2018-07-20 21:45:02,985 INFO L358 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-20 21:45:02,985 INFO L414 AbstractCegarLoop]: === Iteration 6 === [__U_MULTI_f_storage_ultimate_trunk_examples_svcomp_loop_crafted_simple_array_index_value_true_unreach_call__true_termination_i____VERIFIER_assertErr0AssertViolationERROR_FUNCTION]=== [2018-07-20 21:45:02,985 INFO L82 PathProgramCache]: Analyzing trace with hash -1929840458, now seen corresponding path program 4 times [2018-07-20 21:45:02,985 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-07-20 21:45:02,986 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-20 21:45:02,986 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-20 21:45:02,986 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-20 21:45:02,986 INFO L282 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-20 21:45:03,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-20 21:45:03,092 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-20 21:45:03,092 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-20 21:45:03,092 INFO L189 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-07-20 21:45:03,092 INFO L183 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-07-20 21:45:03,092 INFO L419 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-07-20 21:45:03,092 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-20 21:45:03,093 INFO L189 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2018-07-20 21:45:03,114 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-07-20 21:45:03,114 INFO L282 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-20 21:45:03,127 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-07-20 21:45:03,128 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-20 21:45:03,129 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-20 21:45:03,149 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-20 21:45:03,149 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-20 21:45:03,278 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-20 21:45:03,299 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-20 21:45:03,299 INFO L189 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 9 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 9 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-20 21:45:03,313 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-07-20 21:45:03,313 INFO L282 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-07-20 21:45:03,351 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-07-20 21:45:03,351 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-20 21:45:03,355 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-20 21:45:03,378 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-20 21:45:03,378 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-20 21:45:03,428 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-20 21:45:03,431 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-20 21:45:03,431 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8] total 14 [2018-07-20 21:45:03,431 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-20 21:45:03,432 INFO L450 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-07-20 21:45:03,432 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-07-20 21:45:03,432 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2018-07-20 21:45:03,433 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand 8 states. [2018-07-20 21:45:03,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-20 21:45:03,854 INFO L93 Difference]: Finished difference Result 65 states and 73 transitions. [2018-07-20 21:45:03,855 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-07-20 21:45:03,855 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 24 [2018-07-20 21:45:03,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-20 21:45:03,856 INFO L225 Difference]: With dead ends: 65 [2018-07-20 21:45:03,856 INFO L226 Difference]: Without dead ends: 54 [2018-07-20 21:45:03,856 INFO L578 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 88 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2018-07-20 21:45:03,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2018-07-20 21:45:03,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 30. [2018-07-20 21:45:03,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-07-20 21:45:03,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2018-07-20 21:45:03,867 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 24 [2018-07-20 21:45:03,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-20 21:45:03,868 INFO L471 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2018-07-20 21:45:03,868 INFO L472 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-07-20 21:45:03,868 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2018-07-20 21:45:03,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-07-20 21:45:03,869 INFO L350 BasicCegarLoop]: Found error trace [2018-07-20 21:45:03,869 INFO L358 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-20 21:45:03,869 INFO L414 AbstractCegarLoop]: === Iteration 7 === [__U_MULTI_f_storage_ultimate_trunk_examples_svcomp_loop_crafted_simple_array_index_value_true_unreach_call__true_termination_i____VERIFIER_assertErr0AssertViolationERROR_FUNCTION]=== [2018-07-20 21:45:03,869 INFO L82 PathProgramCache]: Analyzing trace with hash 1253847888, now seen corresponding path program 5 times [2018-07-20 21:45:03,869 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-07-20 21:45:03,870 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-20 21:45:03,871 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-20 21:45:03,871 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-20 21:45:03,871 INFO L282 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-20 21:45:03,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-20 21:45:04,090 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-20 21:45:04,091 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-20 21:45:04,091 INFO L189 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-07-20 21:45:04,091 INFO L183 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-07-20 21:45:04,091 INFO L419 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-07-20 21:45:04,091 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-20 21:45:04,091 INFO L189 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-20 21:45:04,099 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-07-20 21:45:04,099 INFO L282 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder INSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-07-20 21:45:04,142 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-07-20 21:45:04,142 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-20 21:45:04,144 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-20 21:45:04,156 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-20 21:45:04,156 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-20 21:45:04,480 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-20 21:45:04,500 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-20 21:45:04,501 INFO L189 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 11 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 11 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-20 21:45:04,516 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-07-20 21:45:04,517 INFO L282 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder INSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-07-20 21:45:04,629 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-07-20 21:45:04,629 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-20 21:45:04,633 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-20 21:45:04,656 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-20 21:45:04,656 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-20 21:45:04,668 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-20 21:45:04,670 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-20 21:45:04,670 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 9] total 16 [2018-07-20 21:45:04,670 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-20 21:45:04,671 INFO L450 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-07-20 21:45:04,671 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-07-20 21:45:04,671 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2018-07-20 21:45:04,672 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 9 states. [2018-07-20 21:45:04,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-20 21:45:04,806 INFO L93 Difference]: Finished difference Result 71 states and 80 transitions. [2018-07-20 21:45:04,807 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-07-20 21:45:04,807 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 26 [2018-07-20 21:45:04,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-20 21:45:04,808 INFO L225 Difference]: With dead ends: 71 [2018-07-20 21:45:04,808 INFO L226 Difference]: Without dead ends: 60 [2018-07-20 21:45:04,809 INFO L578 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 95 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2018-07-20 21:45:04,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2018-07-20 21:45:04,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 32. [2018-07-20 21:45:04,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-07-20 21:45:04,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2018-07-20 21:45:04,815 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 26 [2018-07-20 21:45:04,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-20 21:45:04,816 INFO L471 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2018-07-20 21:45:04,816 INFO L472 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-07-20 21:45:04,816 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2018-07-20 21:45:04,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-07-20 21:45:04,817 INFO L350 BasicCegarLoop]: Found error trace [2018-07-20 21:45:04,817 INFO L358 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-20 21:45:04,817 INFO L414 AbstractCegarLoop]: === Iteration 8 === [__U_MULTI_f_storage_ultimate_trunk_examples_svcomp_loop_crafted_simple_array_index_value_true_unreach_call__true_termination_i____VERIFIER_assertErr0AssertViolationERROR_FUNCTION]=== [2018-07-20 21:45:04,817 INFO L82 PathProgramCache]: Analyzing trace with hash -1533333654, now seen corresponding path program 6 times [2018-07-20 21:45:04,817 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-07-20 21:45:04,818 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-20 21:45:04,818 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-20 21:45:04,818 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-20 21:45:04,818 INFO L282 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-20 21:45:04,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-20 21:45:04,941 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-20 21:45:04,941 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-20 21:45:04,941 INFO L189 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-07-20 21:45:04,941 INFO L183 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-07-20 21:45:04,941 INFO L419 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-07-20 21:45:04,941 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-20 21:45:04,941 INFO L189 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-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 [2018-07-20 21:45:04,949 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-07-20 21:45:04,949 INFO L282 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder MIX_INSIDE_OUTSIDE (IT: FPandBP) [2018-07-20 21:45:05,003 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-07-20 21:45:05,003 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-20 21:45:05,006 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-20 21:45:05,033 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-20 21:45:05,034 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-20 21:45:05,218 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-20 21:45:05,238 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-20 21:45:05,238 INFO L189 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 13 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 13 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-20 21:45:05,253 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-07-20 21:45:05,253 INFO L282 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder MIX_INSIDE_OUTSIDE (IT: FPandBP) [2018-07-20 21:45:05,442 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-07-20 21:45:05,442 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-20 21:45:05,447 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-20 21:45:05,469 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-20 21:45:05,470 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-20 21:45:05,478 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-20 21:45:05,480 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-20 21:45:05,480 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10, 10, 10] total 18 [2018-07-20 21:45:05,480 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-20 21:45:05,480 INFO L450 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-07-20 21:45:05,481 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-07-20 21:45:05,481 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=209, Unknown=0, NotChecked=0, Total=306 [2018-07-20 21:45:05,481 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand 10 states. [2018-07-20 21:45:05,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-20 21:45:05,720 INFO L93 Difference]: Finished difference Result 77 states and 87 transitions. [2018-07-20 21:45:05,720 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-07-20 21:45:05,720 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 28 [2018-07-20 21:45:05,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-20 21:45:05,721 INFO L225 Difference]: With dead ends: 77 [2018-07-20 21:45:05,721 INFO L226 Difference]: Without dead ends: 66 [2018-07-20 21:45:05,722 INFO L578 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 102 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=97, Invalid=209, Unknown=0, NotChecked=0, Total=306 [2018-07-20 21:45:05,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2018-07-20 21:45:05,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 34. [2018-07-20 21:45:05,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-07-20 21:45:05,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 35 transitions. [2018-07-20 21:45:05,728 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 35 transitions. Word has length 28 [2018-07-20 21:45:05,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-20 21:45:05,728 INFO L471 AbstractCegarLoop]: Abstraction has 34 states and 35 transitions. [2018-07-20 21:45:05,728 INFO L472 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-07-20 21:45:05,728 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 35 transitions. [2018-07-20 21:45:05,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-07-20 21:45:05,729 INFO L350 BasicCegarLoop]: Found error trace [2018-07-20 21:45:05,729 INFO L358 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-20 21:45:05,729 INFO L414 AbstractCegarLoop]: === Iteration 9 === [__U_MULTI_f_storage_ultimate_trunk_examples_svcomp_loop_crafted_simple_array_index_value_true_unreach_call__true_termination_i____VERIFIER_assertErr0AssertViolationERROR_FUNCTION]=== [2018-07-20 21:45:05,730 INFO L82 PathProgramCache]: Analyzing trace with hash 44797188, now seen corresponding path program 7 times [2018-07-20 21:45:05,730 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-07-20 21:45:05,731 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-20 21:45:05,731 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-20 21:45:05,731 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-20 21:45:05,731 INFO L282 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-20 21:45:05,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-20 21:45:06,200 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-20 21:45:06,201 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-20 21:45:06,201 INFO L189 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-07-20 21:45:06,201 INFO L183 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-07-20 21:45:06,201 INFO L419 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-07-20 21:45:06,201 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-20 21:45:06,201 INFO L189 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-20 21:45:06,209 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-20 21:45:06,210 INFO L282 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-20 21:45:06,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-20 21:45:06,241 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-20 21:45:06,261 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-20 21:45:06,261 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-20 21:45:06,955 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-20 21:45:06,975 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-20 21:45:06,975 INFO L189 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 15 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 15 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-20 21:45:06,989 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-20 21:45:06,989 INFO L282 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-20 21:45:07,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-20 21:45:07,033 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-20 21:45:07,050 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-20 21:45:07,050 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-20 21:45:07,109 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-20 21:45:07,111 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-20 21:45:07,112 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11, 11, 11] total 20 [2018-07-20 21:45:07,112 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-20 21:45:07,112 INFO L450 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-07-20 21:45:07,113 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-07-20 21:45:07,113 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=262, Unknown=0, NotChecked=0, Total=380 [2018-07-20 21:45:07,113 INFO L87 Difference]: Start difference. First operand 34 states and 35 transitions. Second operand 11 states. [2018-07-20 21:45:07,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-20 21:45:07,374 INFO L93 Difference]: Finished difference Result 83 states and 94 transitions. [2018-07-20 21:45:07,375 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-07-20 21:45:07,375 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 30 [2018-07-20 21:45:07,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-20 21:45:07,376 INFO L225 Difference]: With dead ends: 83 [2018-07-20 21:45:07,376 INFO L226 Difference]: Without dead ends: 72 [2018-07-20 21:45:07,377 INFO L578 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 109 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=118, Invalid=262, Unknown=0, NotChecked=0, Total=380 [2018-07-20 21:45:07,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2018-07-20 21:45:07,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 36. [2018-07-20 21:45:07,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-07-20 21:45:07,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2018-07-20 21:45:07,384 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 30 [2018-07-20 21:45:07,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-20 21:45:07,384 INFO L471 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2018-07-20 21:45:07,384 INFO L472 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-07-20 21:45:07,384 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2018-07-20 21:45:07,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-07-20 21:45:07,385 INFO L350 BasicCegarLoop]: Found error trace [2018-07-20 21:45:07,385 INFO L358 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-20 21:45:07,386 INFO L414 AbstractCegarLoop]: === Iteration 10 === [__U_MULTI_f_storage_ultimate_trunk_examples_svcomp_loop_crafted_simple_array_index_value_true_unreach_call__true_termination_i____VERIFIER_assertErr0AssertViolationERROR_FUNCTION]=== [2018-07-20 21:45:07,386 INFO L82 PathProgramCache]: Analyzing trace with hash 505080862, now seen corresponding path program 8 times [2018-07-20 21:45:07,386 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-07-20 21:45:07,386 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-20 21:45:07,386 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-20 21:45:07,387 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-20 21:45:07,387 INFO L282 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-20 21:45:07,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-20 21:45:07,585 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-20 21:45:07,585 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-20 21:45:07,585 INFO L189 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-07-20 21:45:07,586 INFO L183 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-07-20 21:45:07,586 INFO L419 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-07-20 21:45:07,586 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-20 21:45:07,586 INFO L189 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-20 21:45:07,591 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-07-20 21:45:07,592 INFO L282 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-07-20 21:45:07,625 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-07-20 21:45:07,625 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-20 21:45:07,627 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-20 21:45:07,700 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-20 21:45:07,700 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-20 21:45:08,043 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-20 21:45:08,062 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-20 21:45:08,062 INFO L189 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 17 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 17 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-20 21:45:08,076 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-07-20 21:45:08,077 INFO L282 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-07-20 21:45:08,120 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-07-20 21:45:08,120 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-20 21:45:08,123 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-20 21:45:08,135 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-20 21:45:08,135 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-20 21:45:08,154 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-20 21:45:08,155 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-20 21:45:08,155 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12, 12, 12] total 22 [2018-07-20 21:45:08,155 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-20 21:45:08,156 INFO L450 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-07-20 21:45:08,156 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-07-20 21:45:08,156 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=321, Unknown=0, NotChecked=0, Total=462 [2018-07-20 21:45:08,156 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 12 states. [2018-07-20 21:45:08,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-20 21:45:08,396 INFO L93 Difference]: Finished difference Result 89 states and 101 transitions. [2018-07-20 21:45:08,396 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-07-20 21:45:08,396 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 32 [2018-07-20 21:45:08,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-20 21:45:08,397 INFO L225 Difference]: With dead ends: 89 [2018-07-20 21:45:08,397 INFO L226 Difference]: Without dead ends: 78 [2018-07-20 21:45:08,398 INFO L578 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 116 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=141, Invalid=321, Unknown=0, NotChecked=0, Total=462 [2018-07-20 21:45:08,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2018-07-20 21:45:08,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 38. [2018-07-20 21:45:08,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-07-20 21:45:08,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2018-07-20 21:45:08,405 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 32 [2018-07-20 21:45:08,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-20 21:45:08,406 INFO L471 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2018-07-20 21:45:08,406 INFO L472 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-07-20 21:45:08,406 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2018-07-20 21:45:08,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-07-20 21:45:08,407 INFO L350 BasicCegarLoop]: Found error trace [2018-07-20 21:45:08,407 INFO L358 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-20 21:45:08,407 INFO L414 AbstractCegarLoop]: === Iteration 11 === [__U_MULTI_f_storage_ultimate_trunk_examples_svcomp_loop_crafted_simple_array_index_value_true_unreach_call__true_termination_i____VERIFIER_assertErr0AssertViolationERROR_FUNCTION]=== [2018-07-20 21:45:08,407 INFO L82 PathProgramCache]: Analyzing trace with hash 456060088, now seen corresponding path program 9 times [2018-07-20 21:45:08,407 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-07-20 21:45:08,408 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-20 21:45:08,408 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-20 21:45:08,408 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-20 21:45:08,408 INFO L282 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-20 21:45:08,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-20 21:45:08,611 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-20 21:45:08,611 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-20 21:45:08,612 INFO L189 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-07-20 21:45:08,612 INFO L183 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-07-20 21:45:08,612 INFO L419 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-07-20 21:45:08,612 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-20 21:45:08,612 INFO L189 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-20 21:45:08,619 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-07-20 21:45:08,619 INFO L282 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-07-20 21:45:08,851 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2018-07-20 21:45:08,851 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-20 21:45:08,854 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-20 21:45:08,879 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2018-07-20 21:45:08,879 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-07-20 21:45:08,882 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-07-20 21:45:08,882 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2018-07-20 21:45:08,899 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2018-07-20 21:45:08,899 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-07-20 21:45:08,903 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-07-20 21:45:08,903 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:15, output treesize:9 [2018-07-20 21:45:08,920 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2018-07-20 21:45:08,920 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-07-20 21:45:08,927 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-07-20 21:45:08,927 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:15, output treesize:9 [2018-07-20 21:45:08,961 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2018-07-20 21:45:08,962 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-07-20 21:45:09,005 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-07-20 21:45:09,006 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:15, output treesize:9 [2018-07-20 21:45:09,027 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2018-07-20 21:45:09,028 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-07-20 21:45:09,031 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-07-20 21:45:09,031 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:12, output treesize:5 [2018-07-20 21:45:09,053 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 23 [2018-07-20 21:45:09,054 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2018-07-20 21:45:09,064 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2018-07-20 21:45:09,064 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:16, output treesize:13 [2018-07-20 21:45:09,091 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2018-07-20 21:45:09,092 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-07-20 21:45:09,111 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 23 [2018-07-20 21:45:09,112 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2018-07-20 21:45:09,128 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2018-07-20 21:45:09,128 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:35, output treesize:20 [2018-07-20 21:45:09,180 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2018-07-20 21:45:09,181 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-07-20 21:45:09,239 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 23 [2018-07-20 21:45:09,240 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2018-07-20 21:45:09,266 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2018-07-20 21:45:09,266 INFO L267 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2018-07-20 21:45:09,289 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 4 xjuncts. [2018-07-20 21:45:09,289 INFO L202 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:53, output treesize:27 [2018-07-20 21:45:09,375 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2018-07-20 21:45:09,376 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-07-20 21:45:09,474 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 30 [2018-07-20 21:45:09,475 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2018-07-20 21:45:09,518 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2018-07-20 21:45:09,518 INFO L267 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2018-07-20 21:45:09,569 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2018-07-20 21:45:09,570 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2018-07-20 21:45:09,610 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 5 xjuncts. [2018-07-20 21:45:09,610 INFO L202 ElimStorePlain]: Needed 5 recursive calls to eliminate 8 variables, input treesize:99, output treesize:42 [2018-07-20 21:45:09,694 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2018-07-20 21:45:09,695 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-07-20 21:45:09,833 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2018-07-20 21:45:09,834 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-07-20 21:45:09,977 INFO L700 Elim1Store]: detected not equals via solver [2018-07-20 21:45:09,979 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 37 [2018-07-20 21:45:09,979 INFO L267 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2018-07-20 21:45:10,059 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2018-07-20 21:45:10,060 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2018-07-20 21:45:10,131 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2018-07-20 21:45:10,131 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2018-07-20 21:45:10,178 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 5 dim-1 vars, End of recursive call: and 5 xjuncts. [2018-07-20 21:45:10,178 INFO L202 ElimStorePlain]: Needed 6 recursive calls to eliminate 10 variables, input treesize:131, output treesize:50 [2018-07-20 21:45:10,405 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-20 21:45:10,405 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-20 21:45:11,875 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 44 [2018-07-20 21:45:11,881 INFO L682 Elim1Store]: detected equality via solver [2018-07-20 21:45:11,883 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 56 [2018-07-20 21:45:11,886 INFO L682 Elim1Store]: detected equality via solver [2018-07-20 21:45:11,887 INFO L682 Elim1Store]: detected equality via solver [2018-07-20 21:45:11,893 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 79 [2018-07-20 21:45:11,897 INFO L682 Elim1Store]: detected equality via solver [2018-07-20 21:45:11,898 INFO L682 Elim1Store]: detected equality via solver [2018-07-20 21:45:11,899 INFO L682 Elim1Store]: detected equality via solver [2018-07-20 21:45:11,908 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 113 [2018-07-20 21:45:11,983 WARN L307 Elim1Store]: Array PQE input equivalent to true [2018-07-20 21:45:11,984 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2018-07-20 21:45:12,000 INFO L682 Elim1Store]: detected equality via solver [2018-07-20 21:45:12,002 INFO L682 Elim1Store]: detected equality via solver [2018-07-20 21:45:12,002 INFO L682 Elim1Store]: detected equality via solver [2018-07-20 21:45:12,003 INFO L682 Elim1Store]: detected equality via solver [2018-07-20 21:45:12,007 INFO L682 Elim1Store]: detected equality via solver [2018-07-20 21:45:12,044 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 46 treesize of output 102 [2018-07-20 21:45:12,046 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 4 xjuncts. [2018-07-20 21:45:12,173 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2018-07-20 21:45:12,191 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2018-07-20 21:45:12,206 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2018-07-20 21:45:12,218 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2018-07-20 21:45:12,233 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2018-07-20 21:45:12,234 INFO L202 ElimStorePlain]: Needed 7 recursive calls to eliminate 5 variables, input treesize:48, output treesize:54 [2018-07-20 21:45:12,354 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 6 proven. 104 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-20 21:45:12,373 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-20 21:45:12,374 INFO L189 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 19 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 19 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-20 21:45:12,388 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-07-20 21:45:12,388 INFO L282 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-07-20 21:45:25,589 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2018-07-20 21:45:25,589 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-20 21:45:25,594 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-20 21:45:25,618 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-20 21:45:25,631 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-20 21:45:26,617 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-20 21:45:26,633 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-20 21:45:26,634 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16, 17, 13, 13] total 53 [2018-07-20 21:45:26,634 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-20 21:45:26,634 INFO L450 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-07-20 21:45:26,635 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-07-20 21:45:26,636 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=557, Invalid=2199, Unknown=0, NotChecked=0, Total=2756 [2018-07-20 21:45:26,636 INFO L87 Difference]: Start difference. First operand 38 states and 39 transitions. Second operand 27 states. [2018-07-20 21:45:27,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-20 21:45:27,904 INFO L93 Difference]: Finished difference Result 103 states and 117 transitions. [2018-07-20 21:45:27,904 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-07-20 21:45:27,904 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 34 [2018-07-20 21:45:27,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-20 21:45:27,905 INFO L225 Difference]: With dead ends: 103 [2018-07-20 21:45:27,905 INFO L226 Difference]: Without dead ends: 92 [2018-07-20 21:45:27,906 INFO L578 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 93 SyntacticMatches, 3 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 845 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=770, Invalid=2890, Unknown=0, NotChecked=0, Total=3660 [2018-07-20 21:45:27,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2018-07-20 21:45:27,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 47. [2018-07-20 21:45:27,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-07-20 21:45:27,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 48 transitions. [2018-07-20 21:45:27,916 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 48 transitions. Word has length 34 [2018-07-20 21:45:27,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-20 21:45:27,917 INFO L471 AbstractCegarLoop]: Abstraction has 47 states and 48 transitions. [2018-07-20 21:45:27,917 INFO L472 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-07-20 21:45:27,917 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 48 transitions. [2018-07-20 21:45:27,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-07-20 21:45:27,918 INFO L350 BasicCegarLoop]: Found error trace [2018-07-20 21:45:27,918 INFO L358 BasicCegarLoop]: trace histogram [12, 11, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-20 21:45:27,918 INFO L414 AbstractCegarLoop]: === Iteration 12 === [__U_MULTI_f_storage_ultimate_trunk_examples_svcomp_loop_crafted_simple_array_index_value_true_unreach_call__true_termination_i____VERIFIER_assertErr0AssertViolationERROR_FUNCTION]=== [2018-07-20 21:45:27,918 INFO L82 PathProgramCache]: Analyzing trace with hash 173618110, now seen corresponding path program 1 times [2018-07-20 21:45:27,918 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-07-20 21:45:27,919 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-20 21:45:27,919 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-20 21:45:27,919 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-20 21:45:27,919 INFO L282 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-20 21:45:27,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-20 21:45:28,184 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 2 proven. 132 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-07-20 21:45:28,184 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-20 21:45:28,184 INFO L189 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-07-20 21:45:28,185 INFO L199 CegarAbsIntRunner]: Running AI on error trace of length 45 with the following transitions: [2018-07-20 21:45:28,185 INFO L201 CegarAbsIntRunner]: [0], [1], [4], [6], [9], [11], [15], [19], [23], [25], [29], [33], [38], [41], [46], [47], [48], [50], [51] [2018-07-20 21:45:28,187 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-07-20 21:45:28,187 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-07-20 21:45:28,195 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-07-20 21:45:28,504 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-07-20 21:45:28,504 INFO L272 AbstractInterpreter]: Visited 19 different actions 217 times. Merged at 8 different actions 92 times. Widened at 3 different actions 17 times. Found 10 fixpoints after 3 different actions. Largest state had 4 variables. [2018-07-20 21:45:28,521 INFO L419 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-07-20 21:45:28,522 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-20 21:45:28,522 INFO L189 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-20 21:45:28,527 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-20 21:45:28,527 INFO L282 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-20 21:45:28,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-20 21:45:28,544 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-20 21:45:28,589 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-07-20 21:45:28,590 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-20 21:45:29,026 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 2 proven. 132 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-07-20 21:45:29,045 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-20 21:45:29,045 INFO L189 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 21 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 21 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-20 21:45:29,060 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-20 21:45:29,061 INFO L282 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-20 21:45:29,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-20 21:45:29,132 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-20 21:45:29,162 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-07-20 21:45:29,162 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-20 21:45:29,223 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 2 proven. 132 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-07-20 21:45:29,225 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-20 21:45:29,225 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14, 14, 14] total 26 [2018-07-20 21:45:29,225 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-20 21:45:29,225 INFO L450 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-07-20 21:45:29,226 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-07-20 21:45:29,226 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=457, Unknown=0, NotChecked=0, Total=650 [2018-07-20 21:45:29,226 INFO L87 Difference]: Start difference. First operand 47 states and 48 transitions. Second operand 14 states. [2018-07-20 21:45:30,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-20 21:45:30,132 INFO L93 Difference]: Finished difference Result 112 states and 125 transitions. [2018-07-20 21:45:30,133 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-07-20 21:45:30,133 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 44 [2018-07-20 21:45:30,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-20 21:45:30,134 INFO L225 Difference]: With dead ends: 112 [2018-07-20 21:45:30,134 INFO L226 Difference]: Without dead ends: 94 [2018-07-20 21:45:30,135 INFO L578 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 162 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=193, Invalid=457, Unknown=0, NotChecked=0, Total=650 [2018-07-20 21:45:30,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2018-07-20 21:45:30,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 49. [2018-07-20 21:45:30,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-07-20 21:45:30,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 50 transitions. [2018-07-20 21:45:30,158 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 50 transitions. Word has length 44 [2018-07-20 21:45:30,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-20 21:45:30,158 INFO L471 AbstractCegarLoop]: Abstraction has 49 states and 50 transitions. [2018-07-20 21:45:30,158 INFO L472 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-07-20 21:45:30,159 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 50 transitions. [2018-07-20 21:45:30,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-07-20 21:45:30,159 INFO L350 BasicCegarLoop]: Found error trace [2018-07-20 21:45:30,159 INFO L358 BasicCegarLoop]: trace histogram [13, 12, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-20 21:45:30,160 INFO L414 AbstractCegarLoop]: === Iteration 13 === [__U_MULTI_f_storage_ultimate_trunk_examples_svcomp_loop_crafted_simple_array_index_value_true_unreach_call__true_termination_i____VERIFIER_assertErr0AssertViolationERROR_FUNCTION]=== [2018-07-20 21:45:30,161 INFO L82 PathProgramCache]: Analyzing trace with hash -2076238504, now seen corresponding path program 2 times [2018-07-20 21:45:30,161 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-07-20 21:45:30,162 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-20 21:45:30,162 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-20 21:45:30,162 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-20 21:45:30,162 INFO L282 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-20 21:45:30,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-20 21:45:30,567 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 2 proven. 156 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-07-20 21:45:30,567 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-20 21:45:30,567 INFO L189 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-07-20 21:45:30,568 INFO L183 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-07-20 21:45:30,568 INFO L419 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-07-20 21:45:30,568 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-20 21:45:30,568 INFO L189 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-20 21:45:30,573 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-07-20 21:45:30,573 INFO L282 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-07-20 21:45:30,606 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-07-20 21:45:30,606 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-20 21:45:30,609 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-20 21:45:30,649 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-07-20 21:45:30,650 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-20 21:45:31,117 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 2 proven. 156 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-07-20 21:45:31,136 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-20 21:45:31,137 INFO L189 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 23 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 23 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-20 21:45:31,150 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-07-20 21:45:31,151 INFO L282 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-07-20 21:45:31,238 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-07-20 21:45:31,238 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-20 21:45:31,242 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-20 21:45:31,254 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-07-20 21:45:31,254 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-20 21:45:31,263 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 2 proven. 156 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-07-20 21:45:31,265 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-20 21:45:31,265 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15, 15, 15] total 28 [2018-07-20 21:45:31,265 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-20 21:45:31,265 INFO L450 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-07-20 21:45:31,265 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-07-20 21:45:31,266 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=534, Unknown=0, NotChecked=0, Total=756 [2018-07-20 21:45:31,266 INFO L87 Difference]: Start difference. First operand 49 states and 50 transitions. Second operand 15 states. [2018-07-20 21:45:31,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-20 21:45:31,781 INFO L93 Difference]: Finished difference Result 118 states and 132 transitions. [2018-07-20 21:45:31,804 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-07-20 21:45:31,805 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 46 [2018-07-20 21:45:31,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-20 21:45:31,805 INFO L225 Difference]: With dead ends: 118 [2018-07-20 21:45:31,806 INFO L226 Difference]: Without dead ends: 100 [2018-07-20 21:45:31,806 INFO L578 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 169 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=222, Invalid=534, Unknown=0, NotChecked=0, Total=756 [2018-07-20 21:45:31,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2018-07-20 21:45:31,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 51. [2018-07-20 21:45:31,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-07-20 21:45:31,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2018-07-20 21:45:31,817 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 46 [2018-07-20 21:45:31,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-20 21:45:31,817 INFO L471 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2018-07-20 21:45:31,817 INFO L472 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-07-20 21:45:31,817 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2018-07-20 21:45:31,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-07-20 21:45:31,818 INFO L350 BasicCegarLoop]: Found error trace [2018-07-20 21:45:31,818 INFO L358 BasicCegarLoop]: trace histogram [14, 13, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-20 21:45:31,818 INFO L414 AbstractCegarLoop]: === Iteration 14 === [__U_MULTI_f_storage_ultimate_trunk_examples_svcomp_loop_crafted_simple_array_index_value_true_unreach_call__true_termination_i____VERIFIER_assertErr0AssertViolationERROR_FUNCTION]=== [2018-07-20 21:45:31,819 INFO L82 PathProgramCache]: Analyzing trace with hash 475072626, now seen corresponding path program 3 times [2018-07-20 21:45:31,819 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-07-20 21:45:31,819 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-20 21:45:31,820 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-20 21:45:31,820 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-20 21:45:31,820 INFO L282 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-20 21:45:31,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-20 21:45:32,449 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 2 proven. 182 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-07-20 21:45:32,449 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-20 21:45:32,449 INFO L189 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-07-20 21:45:32,450 INFO L183 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-07-20 21:45:32,450 INFO L419 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-07-20 21:45:32,450 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-20 21:45:32,450 INFO L189 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-20 21:45:32,455 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-07-20 21:45:32,455 INFO L282 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-07-20 21:45:33,913 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2018-07-20 21:45:33,914 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-20 21:45:33,916 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-20 21:45:33,956 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-07-20 21:45:33,956 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-20 21:45:34,723 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 2 proven. 182 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-07-20 21:45:34,743 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-20 21:45:34,743 INFO L189 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 25 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 25 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-20 21:45:34,757 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-07-20 21:45:34,757 INFO L282 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-07-20 21:46:36,869 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2018-07-20 21:46:36,869 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-20 21:46:36,874 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-20 21:46:36,889 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-07-20 21:46:36,889 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-20 21:46:38,008 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 2 proven. 182 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-07-20 21:46:38,012 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-20 21:46:38,012 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16, 16, 16] total 43 [2018-07-20 21:46:38,012 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-20 21:46:38,013 INFO L450 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-07-20 21:46:38,013 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-07-20 21:46:38,014 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=552, Invalid=1254, Unknown=0, NotChecked=0, Total=1806 [2018-07-20 21:46:38,014 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand 16 states. [2018-07-20 21:46:38,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-20 21:46:38,628 INFO L93 Difference]: Finished difference Result 124 states and 139 transitions. [2018-07-20 21:46:38,630 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-07-20 21:46:38,630 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 48 [2018-07-20 21:46:38,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-20 21:46:38,631 INFO L225 Difference]: With dead ends: 124 [2018-07-20 21:46:38,631 INFO L226 Difference]: Without dead ends: 106 [2018-07-20 21:46:38,633 INFO L578 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 162 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=552, Invalid=1254, Unknown=0, NotChecked=0, Total=1806 [2018-07-20 21:46:38,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2018-07-20 21:46:38,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 53. [2018-07-20 21:46:38,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-07-20 21:46:38,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2018-07-20 21:46:38,646 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 48 [2018-07-20 21:46:38,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-20 21:46:38,646 INFO L471 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2018-07-20 21:46:38,646 INFO L472 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-07-20 21:46:38,646 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2018-07-20 21:46:38,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-07-20 21:46:38,647 INFO L350 BasicCegarLoop]: Found error trace [2018-07-20 21:46:38,647 INFO L358 BasicCegarLoop]: trace histogram [15, 14, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-20 21:46:38,647 INFO L414 AbstractCegarLoop]: === Iteration 15 === [__U_MULTI_f_storage_ultimate_trunk_examples_svcomp_loop_crafted_simple_array_index_value_true_unreach_call__true_termination_i____VERIFIER_assertErr0AssertViolationERROR_FUNCTION]=== [2018-07-20 21:46:38,648 INFO L82 PathProgramCache]: Analyzing trace with hash -141257460, now seen corresponding path program 4 times [2018-07-20 21:46:38,650 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-07-20 21:46:38,651 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-20 21:46:38,651 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-20 21:46:38,651 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-20 21:46:38,652 INFO L282 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-20 21:46:38,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-20 21:46:39,042 INFO L134 CoverageAnalysis]: Checked inductivity of 215 backedges. 2 proven. 210 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-07-20 21:46:39,042 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-20 21:46:39,042 INFO L189 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-07-20 21:46:39,042 INFO L183 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-07-20 21:46:39,042 INFO L419 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-07-20 21:46:39,042 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-20 21:46:39,043 INFO L189 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-20 21:46:39,049 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-07-20 21:46:39,049 INFO L282 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-07-20 21:46:39,067 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-07-20 21:46:39,067 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-20 21:46:39,069 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-20 21:46:39,079 INFO L134 CoverageAnalysis]: Checked inductivity of 215 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-07-20 21:46:39,079 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-20 21:46:39,859 INFO L134 CoverageAnalysis]: Checked inductivity of 215 backedges. 2 proven. 210 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-07-20 21:46:39,879 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-20 21:46:39,879 INFO L189 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 27 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 27 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-20 21:46:39,894 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-07-20 21:46:39,894 INFO L282 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-07-20 21:46:39,997 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-07-20 21:46:39,997 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-20 21:46:40,002 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-20 21:46:40,009 INFO L134 CoverageAnalysis]: Checked inductivity of 215 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-07-20 21:46:40,010 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-20 21:46:40,022 INFO L134 CoverageAnalysis]: Checked inductivity of 215 backedges. 2 proven. 210 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-07-20 21:46:40,024 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-20 21:46:40,024 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17, 17, 17] total 32 [2018-07-20 21:46:40,024 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-20 21:46:40,024 INFO L450 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-07-20 21:46:40,025 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-07-20 21:46:40,025 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=286, Invalid=706, Unknown=0, NotChecked=0, Total=992 [2018-07-20 21:46:40,025 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand 17 states. [2018-07-20 21:46:40,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-20 21:46:40,822 INFO L93 Difference]: Finished difference Result 130 states and 146 transitions. [2018-07-20 21:46:40,823 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-07-20 21:46:40,823 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 50 [2018-07-20 21:46:40,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-20 21:46:40,824 INFO L225 Difference]: With dead ends: 130 [2018-07-20 21:46:40,824 INFO L226 Difference]: Without dead ends: 112 [2018-07-20 21:46:40,825 INFO L578 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 183 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=286, Invalid=706, Unknown=0, NotChecked=0, Total=992 [2018-07-20 21:46:40,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2018-07-20 21:46:40,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 55. [2018-07-20 21:46:40,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-07-20 21:46:40,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 56 transitions. [2018-07-20 21:46:40,846 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 56 transitions. Word has length 50 [2018-07-20 21:46:40,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-20 21:46:40,846 INFO L471 AbstractCegarLoop]: Abstraction has 55 states and 56 transitions. [2018-07-20 21:46:40,846 INFO L472 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-07-20 21:46:40,847 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 56 transitions. [2018-07-20 21:46:40,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-07-20 21:46:40,849 INFO L350 BasicCegarLoop]: Found error trace [2018-07-20 21:46:40,849 INFO L358 BasicCegarLoop]: trace histogram [16, 15, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-20 21:46:40,849 INFO L414 AbstractCegarLoop]: === Iteration 16 === [__U_MULTI_f_storage_ultimate_trunk_examples_svcomp_loop_crafted_simple_array_index_value_true_unreach_call__true_termination_i____VERIFIER_assertErr0AssertViolationERROR_FUNCTION]=== [2018-07-20 21:46:40,849 INFO L82 PathProgramCache]: Analyzing trace with hash 271016742, now seen corresponding path program 5 times [2018-07-20 21:46:40,849 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-07-20 21:46:40,850 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-20 21:46:40,850 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-20 21:46:40,850 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-20 21:46:40,851 INFO L282 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-20 21:46:40,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-20 21:46:41,224 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 2 proven. 240 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-07-20 21:46:41,224 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-20 21:46:41,225 INFO L189 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-07-20 21:46:41,225 INFO L183 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-07-20 21:46:41,225 INFO L419 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-07-20 21:46:41,225 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-20 21:46:41,225 INFO L189 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-20 21:46:41,231 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-07-20 21:46:41,231 INFO L282 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder INSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-07-20 21:46:43,421 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2018-07-20 21:46:43,421 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-20 21:46:43,436 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-20 21:46:43,446 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-07-20 21:46:43,446 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-20 21:46:44,407 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 2 proven. 240 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-07-20 21:46:44,427 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-20 21:46:44,427 INFO L189 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 29 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 29 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-20 21:46:44,441 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-07-20 21:46:44,441 INFO L282 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder INSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-07-20 21:46:47,337 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2018-07-20 21:46:47,337 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-20 21:46:47,343 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-20 21:46:47,353 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-07-20 21:46:47,353 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-20 21:46:47,361 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 2 proven. 240 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-07-20 21:46:47,363 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-20 21:46:47,363 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18, 18, 18] total 34 [2018-07-20 21:46:47,363 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-20 21:46:47,363 INFO L450 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-07-20 21:46:47,364 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-07-20 21:46:47,364 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=321, Invalid=801, Unknown=0, NotChecked=0, Total=1122 [2018-07-20 21:46:47,364 INFO L87 Difference]: Start difference. First operand 55 states and 56 transitions. Second operand 18 states. [2018-07-20 21:46:47,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-20 21:46:47,934 INFO L93 Difference]: Finished difference Result 136 states and 153 transitions. [2018-07-20 21:46:47,935 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-07-20 21:46:47,935 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 52 [2018-07-20 21:46:47,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-20 21:46:47,936 INFO L225 Difference]: With dead ends: 136 [2018-07-20 21:46:47,936 INFO L226 Difference]: Without dead ends: 118 [2018-07-20 21:46:47,936 INFO L578 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 190 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=321, Invalid=801, Unknown=0, NotChecked=0, Total=1122 [2018-07-20 21:46:47,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2018-07-20 21:46:47,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 57. [2018-07-20 21:46:47,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-07-20 21:46:47,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2018-07-20 21:46:47,947 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 52 [2018-07-20 21:46:47,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-20 21:46:47,947 INFO L471 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2018-07-20 21:46:47,947 INFO L472 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-07-20 21:46:47,947 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2018-07-20 21:46:47,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2018-07-20 21:46:47,950 INFO L350 BasicCegarLoop]: Found error trace [2018-07-20 21:46:47,950 INFO L358 BasicCegarLoop]: trace histogram [17, 16, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-20 21:46:47,950 INFO L414 AbstractCegarLoop]: === Iteration 17 === [__U_MULTI_f_storage_ultimate_trunk_examples_svcomp_loop_crafted_simple_array_index_value_true_unreach_call__true_termination_i____VERIFIER_assertErr0AssertViolationERROR_FUNCTION]=== [2018-07-20 21:46:47,950 INFO L82 PathProgramCache]: Analyzing trace with hash 1329533632, now seen corresponding path program 6 times [2018-07-20 21:46:47,951 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-07-20 21:46:47,951 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-20 21:46:47,951 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-20 21:46:47,951 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-20 21:46:47,952 INFO L282 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-20 21:46:47,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-20 21:46:48,245 INFO L134 CoverageAnalysis]: Checked inductivity of 277 backedges. 2 proven. 272 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-07-20 21:46:48,245 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-20 21:46:48,245 INFO L189 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-07-20 21:46:48,245 INFO L183 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-07-20 21:46:48,245 INFO L419 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-07-20 21:46:48,245 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-20 21:46:48,245 INFO L189 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-20 21:46:48,251 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-07-20 21:46:48,251 INFO L282 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder MIX_INSIDE_OUTSIDE (IT: FPandBP) [2018-07-20 21:46:48,636 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2018-07-20 21:46:48,636 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-20 21:46:48,639 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-20 21:46:48,648 INFO L134 CoverageAnalysis]: Checked inductivity of 277 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-07-20 21:46:48,648 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-20 21:46:50,033 INFO L134 CoverageAnalysis]: Checked inductivity of 277 backedges. 2 proven. 272 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-07-20 21:46:50,053 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-20 21:46:50,053 INFO L189 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 31 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 31 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-20 21:46:50,068 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-07-20 21:46:50,068 INFO L282 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder MIX_INSIDE_OUTSIDE (IT: FPandBP) [2018-07-20 21:48:03,749 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2018-07-20 21:48:03,750 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-20 21:48:03,757 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-20 21:48:03,781 INFO L134 CoverageAnalysis]: Checked inductivity of 277 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-07-20 21:48:03,781 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-20 21:48:03,880 INFO L134 CoverageAnalysis]: Checked inductivity of 277 backedges. 2 proven. 272 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-07-20 21:48:03,885 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-20 21:48:03,885 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19, 19, 19] total 36 [2018-07-20 21:48:03,886 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-20 21:48:03,886 INFO L450 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-07-20 21:48:03,886 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-07-20 21:48:03,886 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=358, Invalid=902, Unknown=0, NotChecked=0, Total=1260 [2018-07-20 21:48:03,886 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand 19 states. [2018-07-20 21:48:04,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-20 21:48:04,498 INFO L93 Difference]: Finished difference Result 142 states and 160 transitions. [2018-07-20 21:48:04,498 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-07-20 21:48:04,498 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 54 [2018-07-20 21:48:04,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-20 21:48:04,500 INFO L225 Difference]: With dead ends: 142 [2018-07-20 21:48:04,500 INFO L226 Difference]: Without dead ends: 124 [2018-07-20 21:48:04,500 INFO L578 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 197 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=358, Invalid=902, Unknown=0, NotChecked=0, Total=1260 [2018-07-20 21:48:04,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2018-07-20 21:48:04,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 59. [2018-07-20 21:48:04,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-07-20 21:48:04,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 60 transitions. [2018-07-20 21:48:04,515 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 60 transitions. Word has length 54 [2018-07-20 21:48:04,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-20 21:48:04,516 INFO L471 AbstractCegarLoop]: Abstraction has 59 states and 60 transitions. [2018-07-20 21:48:04,516 INFO L472 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-07-20 21:48:04,516 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 60 transitions. [2018-07-20 21:48:04,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-07-20 21:48:04,522 INFO L350 BasicCegarLoop]: Found error trace [2018-07-20 21:48:04,522 INFO L358 BasicCegarLoop]: trace histogram [18, 17, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-20 21:48:04,522 INFO L414 AbstractCegarLoop]: === Iteration 18 === [__U_MULTI_f_storage_ultimate_trunk_examples_svcomp_loop_crafted_simple_array_index_value_true_unreach_call__true_termination_i____VERIFIER_assertErr0AssertViolationERROR_FUNCTION]=== [2018-07-20 21:48:04,522 INFO L82 PathProgramCache]: Analyzing trace with hash 657015770, now seen corresponding path program 7 times [2018-07-20 21:48:04,522 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-07-20 21:48:04,523 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-20 21:48:04,523 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-20 21:48:04,523 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-20 21:48:04,523 INFO L282 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-20 21:48:04,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-20 21:48:05,243 INFO L134 CoverageAnalysis]: Checked inductivity of 311 backedges. 2 proven. 306 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-07-20 21:48:05,244 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-20 21:48:05,244 INFO L189 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-07-20 21:48:05,244 INFO L183 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-07-20 21:48:05,244 INFO L419 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-07-20 21:48:05,244 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-20 21:48:05,244 INFO L189 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-20 21:48:05,250 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-20 21:48:05,250 INFO L282 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-20 21:48:05,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-20 21:48:05,272 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-20 21:48:05,281 INFO L134 CoverageAnalysis]: Checked inductivity of 311 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-07-20 21:48:05,281 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-20 21:48:06,057 INFO L134 CoverageAnalysis]: Checked inductivity of 311 backedges. 2 proven. 306 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-07-20 21:48:06,077 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-20 21:48:06,078 INFO L189 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 33 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 33 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-20 21:48:06,092 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-20 21:48:06,092 INFO L282 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-20 21:48:06,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-20 21:48:06,237 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-20 21:48:06,247 INFO L134 CoverageAnalysis]: Checked inductivity of 311 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-07-20 21:48:06,247 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-20 21:48:06,256 INFO L134 CoverageAnalysis]: Checked inductivity of 311 backedges. 2 proven. 306 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-07-20 21:48:06,257 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-20 21:48:06,257 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20, 20, 20] total 38 [2018-07-20 21:48:06,258 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-20 21:48:06,258 INFO L450 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-07-20 21:48:06,258 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-07-20 21:48:06,258 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=397, Invalid=1009, Unknown=0, NotChecked=0, Total=1406 [2018-07-20 21:48:06,259 INFO L87 Difference]: Start difference. First operand 59 states and 60 transitions. Second operand 20 states. [2018-07-20 21:48:06,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-20 21:48:06,913 INFO L93 Difference]: Finished difference Result 148 states and 167 transitions. [2018-07-20 21:48:06,914 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-07-20 21:48:06,914 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 56 [2018-07-20 21:48:06,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-20 21:48:06,915 INFO L225 Difference]: With dead ends: 148 [2018-07-20 21:48:06,915 INFO L226 Difference]: Without dead ends: 130 [2018-07-20 21:48:06,916 INFO L578 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 204 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=397, Invalid=1009, Unknown=0, NotChecked=0, Total=1406 [2018-07-20 21:48:06,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2018-07-20 21:48:06,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 61. [2018-07-20 21:48:06,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-07-20 21:48:06,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 62 transitions. [2018-07-20 21:48:06,934 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 62 transitions. Word has length 56 [2018-07-20 21:48:06,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-20 21:48:06,934 INFO L471 AbstractCegarLoop]: Abstraction has 61 states and 62 transitions. [2018-07-20 21:48:06,934 INFO L472 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-07-20 21:48:06,934 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 62 transitions. [2018-07-20 21:48:06,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-07-20 21:48:06,935 INFO L350 BasicCegarLoop]: Found error trace [2018-07-20 21:48:06,935 INFO L358 BasicCegarLoop]: trace histogram [19, 18, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-20 21:48:06,935 INFO L414 AbstractCegarLoop]: === Iteration 19 === [__U_MULTI_f_storage_ultimate_trunk_examples_svcomp_loop_crafted_simple_array_index_value_true_unreach_call__true_termination_i____VERIFIER_assertErr0AssertViolationERROR_FUNCTION]=== [2018-07-20 21:48:06,936 INFO L82 PathProgramCache]: Analyzing trace with hash -1387555212, now seen corresponding path program 8 times [2018-07-20 21:48:06,936 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-07-20 21:48:06,936 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-20 21:48:06,937 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-20 21:48:06,937 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-20 21:48:06,937 INFO L282 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-20 21:48:06,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-20 21:48:07,289 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 2 proven. 342 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-07-20 21:48:07,289 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-20 21:48:07,289 INFO L189 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-07-20 21:48:07,289 INFO L183 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-07-20 21:48:07,289 INFO L419 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-07-20 21:48:07,289 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-20 21:48:07,289 INFO L189 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-20 21:48:07,295 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-07-20 21:48:07,295 INFO L282 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-07-20 21:48:07,320 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-07-20 21:48:07,320 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-20 21:48:07,322 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-20 21:48:07,331 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-07-20 21:48:07,331 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-20 21:48:08,309 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 2 proven. 342 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-07-20 21:48:08,329 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-20 21:48:08,329 INFO L189 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 35 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 35 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-20 21:48:08,343 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-07-20 21:48:08,344 INFO L282 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-07-20 21:48:08,452 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-07-20 21:48:08,452 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-20 21:48:08,457 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-20 21:48:08,466 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-07-20 21:48:08,467 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-20 21:48:08,476 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 2 proven. 342 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-07-20 21:48:08,477 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-20 21:48:08,478 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21, 21, 21] total 40 [2018-07-20 21:48:08,478 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-20 21:48:08,478 INFO L450 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-07-20 21:48:08,478 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-07-20 21:48:08,479 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=438, Invalid=1122, Unknown=0, NotChecked=0, Total=1560 [2018-07-20 21:48:08,479 INFO L87 Difference]: Start difference. First operand 61 states and 62 transitions. Second operand 21 states. [2018-07-20 21:48:09,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-20 21:48:09,347 INFO L93 Difference]: Finished difference Result 154 states and 174 transitions. [2018-07-20 21:48:09,348 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-07-20 21:48:09,348 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 58 [2018-07-20 21:48:09,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-20 21:48:09,349 INFO L225 Difference]: With dead ends: 154 [2018-07-20 21:48:09,349 INFO L226 Difference]: Without dead ends: 136 [2018-07-20 21:48:09,350 INFO L578 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 211 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=438, Invalid=1122, Unknown=0, NotChecked=0, Total=1560 [2018-07-20 21:48:09,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2018-07-20 21:48:09,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 63. [2018-07-20 21:48:09,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-07-20 21:48:09,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2018-07-20 21:48:09,364 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 58 [2018-07-20 21:48:09,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-20 21:48:09,364 INFO L471 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2018-07-20 21:48:09,364 INFO L472 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-07-20 21:48:09,364 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2018-07-20 21:48:09,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2018-07-20 21:48:09,365 INFO L350 BasicCegarLoop]: Found error trace [2018-07-20 21:48:09,365 INFO L358 BasicCegarLoop]: trace histogram [20, 19, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-20 21:48:09,365 INFO L414 AbstractCegarLoop]: === Iteration 20 === [__U_MULTI_f_storage_ultimate_trunk_examples_svcomp_loop_crafted_simple_array_index_value_true_unreach_call__true_termination_i____VERIFIER_assertErr0AssertViolationERROR_FUNCTION]=== [2018-07-20 21:48:09,365 INFO L82 PathProgramCache]: Analyzing trace with hash 874752654, now seen corresponding path program 9 times [2018-07-20 21:48:09,366 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-07-20 21:48:09,366 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-20 21:48:09,366 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-20 21:48:09,366 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-20 21:48:09,367 INFO L282 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-20 21:48:09,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-20 21:48:09,632 INFO L134 CoverageAnalysis]: Checked inductivity of 385 backedges. 2 proven. 380 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-07-20 21:48:09,633 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-20 21:48:09,633 INFO L189 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-07-20 21:48:09,633 INFO L183 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-07-20 21:48:09,633 INFO L419 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-07-20 21:48:09,633 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-20 21:48:09,633 INFO L189 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-20 21:48:09,639 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-07-20 21:48:09,640 INFO L282 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-07-20 21:48:18,127 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 20 check-sat command(s) [2018-07-20 21:48:18,128 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-20 21:48:18,145 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-20 21:48:18,155 INFO L134 CoverageAnalysis]: Checked inductivity of 385 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-07-20 21:48:18,156 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-20 21:48:19,176 INFO L134 CoverageAnalysis]: Checked inductivity of 385 backedges. 2 proven. 380 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-07-20 21:48:19,197 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-20 21:48:19,197 INFO L189 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 37 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 37 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-20 21:48:19,211 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-07-20 21:48:19,211 INFO L282 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown