java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data --generate-csv --csv-dir csv -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/ai/taipanbench/svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem14_label45_true-unreach-call_false-termination.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-ddc4263 [2018-08-07 12:40:36,108 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-08-07 12:40:36,111 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-08-07 12:40:36,131 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-08-07 12:40:36,132 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-08-07 12:40:36,133 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-08-07 12:40:36,135 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-08-07 12:40:36,138 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-08-07 12:40:36,139 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-08-07 12:40:36,141 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-08-07 12:40:36,144 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-08-07 12:40:36,144 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-08-07 12:40:36,145 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-08-07 12:40:36,146 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-08-07 12:40:36,150 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-08-07 12:40:36,157 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-08-07 12:40:36,158 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-08-07 12:40:36,163 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-08-07 12:40:36,165 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-08-07 12:40:36,170 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-08-07 12:40:36,171 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-08-07 12:40:36,176 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-08-07 12:40:36,179 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-08-07 12:40:36,194 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/taipanbench/svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf [2018-08-07 12:40:36,220 INFO L110 SettingsManager]: Loading preferences was successful [2018-08-07 12:40:36,221 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-08-07 12:40:36,221 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-08-07 12:40:36,222 INFO L133 SettingsManager]: * User list type=DISABLED [2018-08-07 12:40:36,222 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-08-07 12:40:36,222 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-08-07 12:40:36,225 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-08-07 12:40:36,225 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-08-07 12:40:36,225 INFO L133 SettingsManager]: * Log string format=TERM [2018-08-07 12:40:36,225 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-08-07 12:40:36,226 INFO L133 SettingsManager]: * Interval Domain=false [2018-08-07 12:40:36,227 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-08-07 12:40:36,227 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-08-07 12:40:36,227 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-08-07 12:40:36,227 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-08-07 12:40:36,228 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-08-07 12:40:36,229 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-08-07 12:40:36,229 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-08-07 12:40:36,229 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-08-07 12:40:36,229 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-08-07 12:40:36,229 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-08-07 12:40:36,230 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-08-07 12:40:36,230 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-08-07 12:40:36,230 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-08-07 12:40:36,230 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-08-07 12:40:36,231 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-08-07 12:40:36,231 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-08-07 12:40:36,231 INFO L133 SettingsManager]: * Trace refinement strategy=RUBBER_TAIPAN [2018-08-07 12:40:36,231 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-08-07 12:40:36,232 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-08-07 12:40:36,232 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-08-07 12:40:36,232 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-08-07 12:40:36,232 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-08-07 12:40:36,284 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-08-07 12:40:36,298 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-08-07 12:40:36,307 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-08-07 12:40:36,309 INFO L271 PluginConnector]: Initializing CDTParser... [2018-08-07 12:40:36,309 INFO L276 PluginConnector]: CDTParser initialized [2018-08-07 12:40:36,310 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem14_label45_true-unreach-call_false-termination.c [2018-08-07 12:40:36,652 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0e74cfc78/5d38958a2ae04abb80a8abf8176b185c/FLAGc0e0bedcd [2018-08-07 12:40:36,937 INFO L276 CDTParser]: Found 1 translation units. [2018-08-07 12:40:36,938 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem14_label45_true-unreach-call_false-termination.c [2018-08-07 12:40:36,959 INFO L324 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0e74cfc78/5d38958a2ae04abb80a8abf8176b185c/FLAGc0e0bedcd [2018-08-07 12:40:36,981 INFO L332 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0e74cfc78/5d38958a2ae04abb80a8abf8176b185c [2018-08-07 12:40:36,993 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-08-07 12:40:36,996 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-08-07 12:40:36,998 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-08-07 12:40:36,998 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-08-07 12:40:37,006 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-08-07 12:40:37,007 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.08 12:40:36" (1/1) ... [2018-08-07 12:40:37,009 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@547b67dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.08 12:40:37, skipping insertion in model container [2018-08-07 12:40:37,009 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.08 12:40:36" (1/1) ... [2018-08-07 12:40:37,214 INFO L179 PRDispatcher]: Starting pre-run dispatcher in SV-COMP mode [2018-08-07 12:40:37,561 INFO L175 PostProcessor]: Settings: Checked method=main [2018-08-07 12:40:37,577 INFO L422 MainDispatcher]: Starting main dispatcher in SV-COMP mode [2018-08-07 12:40:37,735 INFO L175 PostProcessor]: Settings: Checked method=main [2018-08-07 12:40:37,781 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.08 12:40:37 WrapperNode [2018-08-07 12:40:37,781 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-08-07 12:40:37,782 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-08-07 12:40:37,782 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-08-07 12:40:37,782 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-08-07 12:40:37,792 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.08 12:40:37" (1/1) ... [2018-08-07 12:40:37,831 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.08 12:40:37" (1/1) ... [2018-08-07 12:40:37,927 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-08-07 12:40:37,927 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-08-07 12:40:37,928 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-08-07 12:40:37,928 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-08-07 12:40:37,939 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.08 12:40:37" (1/1) ... [2018-08-07 12:40:37,939 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.08 12:40:37" (1/1) ... [2018-08-07 12:40:37,951 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.08 12:40:37" (1/1) ... [2018-08-07 12:40:37,951 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.08 12:40:37" (1/1) ... [2018-08-07 12:40:38,000 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.08 12:40:37" (1/1) ... [2018-08-07 12:40:38,226 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.08 12:40:37" (1/1) ... [2018-08-07 12:40:38,245 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.08 12:40:37" (1/1) ... [2018-08-07 12:40:38,257 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-08-07 12:40:38,258 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-08-07 12:40:38,258 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-08-07 12:40:38,258 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-08-07 12:40:38,259 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.08 12:40:37" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-08-07 12:40:38,332 INFO L130 BoogieDeclarations]: Found specification of procedure __U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_false_termination_c__calculate_output [2018-08-07 12:40:38,332 INFO L138 BoogieDeclarations]: Found implementation of procedure __U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_false_termination_c__calculate_output [2018-08-07 12:40:38,332 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-08-07 12:40:38,333 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-08-07 12:40:38,333 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-08-07 12:40:38,333 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-08-07 12:40:38,333 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-08-07 12:40:38,333 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-08-07 12:40:42,025 INFO L273 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-08-07 12:40:42,025 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.08 12:40:42 BoogieIcfgContainer [2018-08-07 12:40:42,026 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-08-07 12:40:42,027 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-08-07 12:40:42,027 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-08-07 12:40:42,038 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-08-07 12:40:42,039 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.08 12:40:36" (1/3) ... [2018-08-07 12:40:42,040 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f4c5d10 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.08 12:40:42, skipping insertion in model container [2018-08-07 12:40:42,040 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.08 12:40:37" (2/3) ... [2018-08-07 12:40:42,040 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f4c5d10 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.08 12:40:42, skipping insertion in model container [2018-08-07 12:40:42,041 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.08 12:40:42" (3/3) ... [2018-08-07 12:40:42,043 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem14_label45_true-unreach-call_false-termination.c [2018-08-07 12:40:42,052 INFO L133 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-08-07 12:40:42,060 INFO L145 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-08-07 12:40:42,111 INFO L129 ementStrategyFactory]: Using default assertion order modulation [2018-08-07 12:40:42,112 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-08-07 12:40:42,112 INFO L382 AbstractCegarLoop]: Hoare is true [2018-08-07 12:40:42,112 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-08-07 12:40:42,112 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-08-07 12:40:42,112 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-08-07 12:40:42,113 INFO L386 AbstractCegarLoop]: Difference is false [2018-08-07 12:40:42,113 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-08-07 12:40:42,113 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-08-07 12:40:42,139 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states. [2018-08-07 12:40:42,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-08-07 12:40:42,150 INFO L368 BasicCegarLoop]: Found error trace [2018-08-07 12:40:42,151 INFO L376 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-08-07 12:40:42,152 INFO L423 AbstractCegarLoop]: === Iteration 1 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_false_termination_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-08-07 12:40:42,157 INFO L82 PathProgramCache]: Analyzing trace with hash 1678980063, now seen corresponding path program 1 times [2018-08-07 12:40:42,160 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-08-07 12:40:42,206 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:40:42,207 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:40:42,207 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:40:42,207 INFO L292 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-08-07 12:40:42,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:40:42,617 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-08-07 12:40:42,620 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-08-07 12:40:42,620 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-08-07 12:40:42,620 INFO L262 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-08-07 12:40:42,627 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-08-07 12:40:42,643 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-08-07 12:40:42,644 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-08-07 12:40:42,647 INFO L87 Difference]: Start difference. First operand 255 states. Second operand 4 states. [2018-08-07 12:40:45,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-08-07 12:40:45,755 INFO L93 Difference]: Finished difference Result 894 states and 1610 transitions. [2018-08-07 12:40:45,758 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-08-07 12:40:45,759 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 43 [2018-08-07 12:40:45,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-08-07 12:40:45,782 INFO L225 Difference]: With dead ends: 894 [2018-08-07 12:40:45,782 INFO L226 Difference]: Without dead ends: 633 [2018-08-07 12:40:45,794 INFO L603 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-08-07 12:40:45,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 633 states. [2018-08-07 12:40:45,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 633 to 434. [2018-08-07 12:40:45,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 434 states. [2018-08-07 12:40:45,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 434 states to 434 states and 662 transitions. [2018-08-07 12:40:45,894 INFO L78 Accepts]: Start accepts. Automaton has 434 states and 662 transitions. Word has length 43 [2018-08-07 12:40:45,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-08-07 12:40:45,894 INFO L480 AbstractCegarLoop]: Abstraction has 434 states and 662 transitions. [2018-08-07 12:40:45,894 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-08-07 12:40:45,895 INFO L276 IsEmpty]: Start isEmpty. Operand 434 states and 662 transitions. [2018-08-07 12:40:45,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2018-08-07 12:40:45,901 INFO L368 BasicCegarLoop]: Found error trace [2018-08-07 12:40:45,902 INFO L376 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-08-07 12:40:45,902 INFO L423 AbstractCegarLoop]: === Iteration 2 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_false_termination_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-08-07 12:40:45,903 INFO L82 PathProgramCache]: Analyzing trace with hash -1230860650, now seen corresponding path program 1 times [2018-08-07 12:40:45,903 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-08-07 12:40:45,904 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:40:45,904 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:40:45,904 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:40:45,905 INFO L292 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-08-07 12:40:45,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:40:46,218 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-08-07 12:40:46,219 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-08-07 12:40:46,219 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-08-07 12:40:46,219 INFO L262 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-08-07 12:40:46,221 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-08-07 12:40:46,221 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-08-07 12:40:46,221 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-08-07 12:40:46,222 INFO L87 Difference]: Start difference. First operand 434 states and 662 transitions. Second operand 4 states. [2018-08-07 12:40:49,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-08-07 12:40:49,042 INFO L93 Difference]: Finished difference Result 1594 states and 2534 transitions. [2018-08-07 12:40:49,043 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-08-07 12:40:49,044 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 127 [2018-08-07 12:40:49,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-08-07 12:40:49,053 INFO L225 Difference]: With dead ends: 1594 [2018-08-07 12:40:49,053 INFO L226 Difference]: Without dead ends: 780 [2018-08-07 12:40:49,061 INFO L603 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-08-07 12:40:49,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 780 states. [2018-08-07 12:40:49,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 780 to 780. [2018-08-07 12:40:49,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 780 states. [2018-08-07 12:40:49,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 780 states to 780 states and 1153 transitions. [2018-08-07 12:40:49,130 INFO L78 Accepts]: Start accepts. Automaton has 780 states and 1153 transitions. Word has length 127 [2018-08-07 12:40:49,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-08-07 12:40:49,131 INFO L480 AbstractCegarLoop]: Abstraction has 780 states and 1153 transitions. [2018-08-07 12:40:49,131 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-08-07 12:40:49,131 INFO L276 IsEmpty]: Start isEmpty. Operand 780 states and 1153 transitions. [2018-08-07 12:40:49,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2018-08-07 12:40:49,144 INFO L368 BasicCegarLoop]: Found error trace [2018-08-07 12:40:49,144 INFO L376 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-08-07 12:40:49,144 INFO L423 AbstractCegarLoop]: === Iteration 3 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_false_termination_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-08-07 12:40:49,145 INFO L82 PathProgramCache]: Analyzing trace with hash 1083722862, now seen corresponding path program 1 times [2018-08-07 12:40:49,145 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-08-07 12:40:49,149 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:40:49,149 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:40:49,149 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:40:49,149 INFO L292 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-08-07 12:40:49,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:40:49,357 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-08-07 12:40:49,357 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-08-07 12:40:49,358 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-08-07 12:40:49,358 INFO L262 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-08-07 12:40:49,359 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-08-07 12:40:49,359 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-08-07 12:40:49,359 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-08-07 12:40:49,359 INFO L87 Difference]: Start difference. First operand 780 states and 1153 transitions. Second operand 4 states. [2018-08-07 12:40:52,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-08-07 12:40:52,122 INFO L93 Difference]: Finished difference Result 3018 states and 4609 transitions. [2018-08-07 12:40:52,123 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-08-07 12:40:52,123 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 139 [2018-08-07 12:40:52,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-08-07 12:40:52,141 INFO L225 Difference]: With dead ends: 3018 [2018-08-07 12:40:52,141 INFO L226 Difference]: Without dead ends: 2244 [2018-08-07 12:40:52,152 INFO L603 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-08-07 12:40:52,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2244 states. [2018-08-07 12:40:52,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2244 to 2244. [2018-08-07 12:40:52,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2244 states. [2018-08-07 12:40:52,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2244 states to 2244 states and 3156 transitions. [2018-08-07 12:40:52,223 INFO L78 Accepts]: Start accepts. Automaton has 2244 states and 3156 transitions. Word has length 139 [2018-08-07 12:40:52,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-08-07 12:40:52,223 INFO L480 AbstractCegarLoop]: Abstraction has 2244 states and 3156 transitions. [2018-08-07 12:40:52,224 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-08-07 12:40:52,224 INFO L276 IsEmpty]: Start isEmpty. Operand 2244 states and 3156 transitions. [2018-08-07 12:40:52,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 260 [2018-08-07 12:40:52,236 INFO L368 BasicCegarLoop]: Found error trace [2018-08-07 12:40:52,236 INFO L376 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-08-07 12:40:52,236 INFO L423 AbstractCegarLoop]: === Iteration 4 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_false_termination_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-08-07 12:40:52,237 INFO L82 PathProgramCache]: Analyzing trace with hash -2109419603, now seen corresponding path program 1 times [2018-08-07 12:40:52,237 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-08-07 12:40:52,238 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:40:52,238 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:40:52,238 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:40:52,238 INFO L292 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-08-07 12:40:52,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:40:52,598 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 166 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-08-07 12:40:52,598 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-08-07 12:40:52,599 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/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 [2018-08-07 12:40:52,608 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:40:52,608 INFO L292 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-08-07 12:40:52,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:40:52,724 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-08-07 12:40:53,229 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 166 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-08-07 12:40:53,229 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-08-07 12:40:53,533 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 166 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-08-07 12:40:53,557 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-08-07 12:40:53,557 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/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 [2018-08-07 12:40:53,575 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:40:53,575 INFO L292 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-08-07 12:40:53,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:40:53,792 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-08-07 12:40:53,999 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 166 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-08-07 12:40:54,000 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-08-07 12:40:54,697 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 166 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-08-07 12:40:54,701 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-08-07 12:40:54,701 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 12 [2018-08-07 12:40:54,701 INFO L255 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-08-07 12:40:54,703 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-08-07 12:40:54,703 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-08-07 12:40:54,704 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2018-08-07 12:40:54,704 INFO L87 Difference]: Start difference. First operand 2244 states and 3156 transitions. Second operand 9 states. [2018-08-07 12:41:00,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-08-07 12:41:00,633 INFO L93 Difference]: Finished difference Result 6566 states and 10229 transitions. [2018-08-07 12:41:00,633 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-08-07 12:41:00,633 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 259 [2018-08-07 12:41:00,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-08-07 12:41:00,676 INFO L225 Difference]: With dead ends: 6566 [2018-08-07 12:41:00,676 INFO L226 Difference]: Without dead ends: 3363 [2018-08-07 12:41:00,721 INFO L603 BasicCegarLoop]: 0 DeclaredPredicates, 1056 GetRequests, 1034 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=127, Invalid=253, Unknown=0, NotChecked=0, Total=380 [2018-08-07 12:41:00,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3363 states. [2018-08-07 12:41:00,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3363 to 3248. [2018-08-07 12:41:00,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3248 states. [2018-08-07 12:41:00,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3248 states to 3248 states and 4177 transitions. [2018-08-07 12:41:00,877 INFO L78 Accepts]: Start accepts. Automaton has 3248 states and 4177 transitions. Word has length 259 [2018-08-07 12:41:00,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-08-07 12:41:00,877 INFO L480 AbstractCegarLoop]: Abstraction has 3248 states and 4177 transitions. [2018-08-07 12:41:00,878 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-08-07 12:41:00,878 INFO L276 IsEmpty]: Start isEmpty. Operand 3248 states and 4177 transitions. [2018-08-07 12:41:00,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 274 [2018-08-07 12:41:00,899 INFO L368 BasicCegarLoop]: Found error trace [2018-08-07 12:41:00,900 INFO L376 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-08-07 12:41:00,900 INFO L423 AbstractCegarLoop]: === Iteration 5 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_false_termination_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-08-07 12:41:00,900 INFO L82 PathProgramCache]: Analyzing trace with hash 505840937, now seen corresponding path program 1 times [2018-08-07 12:41:00,901 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-08-07 12:41:00,902 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:41:00,902 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:41:00,902 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:41:00,902 INFO L292 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-08-07 12:41:00,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:41:01,224 WARN L170 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-08-07 12:41:01,748 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 73 proven. 41 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2018-08-07 12:41:01,749 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-08-07 12:41:01,749 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/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 [2018-08-07 12:41:01,764 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:41:01,764 INFO L292 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-08-07 12:41:01,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:41:01,877 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-08-07 12:41:02,343 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 180 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-08-07 12:41:02,343 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-08-07 12:41:02,833 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 180 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-08-07 12:41:02,864 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-08-07 12:41:02,864 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/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 [2018-08-07 12:41:02,888 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:41:02,888 INFO L292 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-08-07 12:41:03,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:41:03,117 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-08-07 12:41:03,440 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 73 proven. 2 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2018-08-07 12:41:03,441 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-08-07 12:41:03,808 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 75 proven. 0 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2018-08-07 12:41:03,811 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 4 imperfect interpolant sequences. [2018-08-07 12:41:03,811 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5, 5, 5] total 11 [2018-08-07 12:41:03,811 INFO L262 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-08-07 12:41:03,813 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-08-07 12:41:03,813 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-08-07 12:41:03,814 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2018-08-07 12:41:03,814 INFO L87 Difference]: Start difference. First operand 3248 states and 4177 transitions. Second operand 5 states. [2018-08-07 12:41:05,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-08-07 12:41:05,242 INFO L93 Difference]: Finished difference Result 6231 states and 8048 transitions. [2018-08-07 12:41:05,245 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-08-07 12:41:05,246 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 273 [2018-08-07 12:41:05,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-08-07 12:41:05,265 INFO L225 Difference]: With dead ends: 6231 [2018-08-07 12:41:05,265 INFO L226 Difference]: Without dead ends: 3197 [2018-08-07 12:41:05,285 INFO L603 BasicCegarLoop]: 0 DeclaredPredicates, 1100 GetRequests, 1080 SyntacticMatches, 10 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2018-08-07 12:41:05,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3197 states. [2018-08-07 12:41:05,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3197 to 3172. [2018-08-07 12:41:05,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3172 states. [2018-08-07 12:41:05,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3172 states to 3172 states and 3964 transitions. [2018-08-07 12:41:05,372 INFO L78 Accepts]: Start accepts. Automaton has 3172 states and 3964 transitions. Word has length 273 [2018-08-07 12:41:05,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-08-07 12:41:05,373 INFO L480 AbstractCegarLoop]: Abstraction has 3172 states and 3964 transitions. [2018-08-07 12:41:05,373 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-08-07 12:41:05,374 INFO L276 IsEmpty]: Start isEmpty. Operand 3172 states and 3964 transitions. [2018-08-07 12:41:05,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 277 [2018-08-07 12:41:05,389 INFO L368 BasicCegarLoop]: Found error trace [2018-08-07 12:41:05,390 INFO L376 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-08-07 12:41:05,390 INFO L423 AbstractCegarLoop]: === Iteration 6 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_false_termination_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-08-07 12:41:05,390 INFO L82 PathProgramCache]: Analyzing trace with hash -2054011446, now seen corresponding path program 1 times [2018-08-07 12:41:05,391 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-08-07 12:41:05,391 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:41:05,392 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:41:05,392 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:41:05,392 INFO L292 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-08-07 12:41:05,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:41:06,576 WARN L170 SmtUtils]: Spent 507.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 23 [2018-08-07 12:41:07,038 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 146 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-08-07 12:41:07,039 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-08-07 12:41:07,039 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/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 [2018-08-07 12:41:07,048 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:41:07,048 INFO L292 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-08-07 12:41:07,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:41:07,135 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-08-07 12:41:07,471 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 148 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2018-08-07 12:41:07,471 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-08-07 12:41:07,658 WARN L170 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 36 [2018-08-07 12:41:08,077 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 72 proven. 108 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-08-07 12:41:08,107 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-08-07 12:41:08,108 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [12, 5] total 17 [2018-08-07 12:41:08,108 INFO L262 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-08-07 12:41:08,108 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-08-07 12:41:08,108 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-08-07 12:41:08,109 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2018-08-07 12:41:08,109 INFO L87 Difference]: Start difference. First operand 3172 states and 3964 transitions. Second operand 5 states. [2018-08-07 12:41:10,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-08-07 12:41:10,357 INFO L93 Difference]: Finished difference Result 7725 states and 9433 transitions. [2018-08-07 12:41:10,358 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-08-07 12:41:10,358 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 276 [2018-08-07 12:41:10,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-08-07 12:41:10,379 INFO L225 Difference]: With dead ends: 7725 [2018-08-07 12:41:10,379 INFO L226 Difference]: Without dead ends: 4363 [2018-08-07 12:41:10,395 INFO L603 BasicCegarLoop]: 0 DeclaredPredicates, 571 GetRequests, 548 SyntacticMatches, 5 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2018-08-07 12:41:10,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4363 states. [2018-08-07 12:41:10,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4363 to 3982. [2018-08-07 12:41:10,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3982 states. [2018-08-07 12:41:10,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3982 states to 3982 states and 4775 transitions. [2018-08-07 12:41:10,501 INFO L78 Accepts]: Start accepts. Automaton has 3982 states and 4775 transitions. Word has length 276 [2018-08-07 12:41:10,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-08-07 12:41:10,502 INFO L480 AbstractCegarLoop]: Abstraction has 3982 states and 4775 transitions. [2018-08-07 12:41:10,502 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-08-07 12:41:10,502 INFO L276 IsEmpty]: Start isEmpty. Operand 3982 states and 4775 transitions. [2018-08-07 12:41:10,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 362 [2018-08-07 12:41:10,526 INFO L368 BasicCegarLoop]: Found error trace [2018-08-07 12:41:10,526 INFO L376 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-08-07 12:41:10,527 INFO L423 AbstractCegarLoop]: === Iteration 7 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_false_termination_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-08-07 12:41:10,527 INFO L82 PathProgramCache]: Analyzing trace with hash -776514794, now seen corresponding path program 1 times [2018-08-07 12:41:10,527 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-08-07 12:41:10,528 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:41:10,528 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:41:10,528 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:41:10,529 INFO L292 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-08-07 12:41:10,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:41:11,033 WARN L170 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-08-07 12:41:11,619 INFO L134 CoverageAnalysis]: Checked inductivity of 391 backedges. 196 proven. 190 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-08-07 12:41:11,620 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-08-07 12:41:11,620 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-08-07 12:41:11,631 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:41:11,631 INFO L292 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-08-07 12:41:11,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:41:11,775 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-08-07 12:41:12,239 INFO L134 CoverageAnalysis]: Checked inductivity of 391 backedges. 301 proven. 53 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2018-08-07 12:41:12,239 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-08-07 12:41:12,953 INFO L134 CoverageAnalysis]: Checked inductivity of 391 backedges. 118 proven. 268 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-08-07 12:41:12,974 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-08-07 12:41:12,974 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 8 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 8 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-08-07 12:41:12,990 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:41:12,991 INFO L292 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-08-07 12:41:13,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:41:13,248 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-08-07 12:41:14,202 INFO L134 CoverageAnalysis]: Checked inductivity of 391 backedges. 301 proven. 53 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2018-08-07 12:41:14,203 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-08-07 12:41:14,902 INFO L134 CoverageAnalysis]: Checked inductivity of 391 backedges. 118 proven. 268 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-08-07 12:41:14,905 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-08-07 12:41:14,905 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8, 8, 8, 8] total 26 [2018-08-07 12:41:14,905 INFO L255 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-08-07 12:41:14,906 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-08-07 12:41:14,906 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-08-07 12:41:14,907 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=499, Unknown=0, NotChecked=0, Total=650 [2018-08-07 12:41:14,907 INFO L87 Difference]: Start difference. First operand 3982 states and 4775 transitions. Second operand 15 states. [2018-08-07 12:41:19,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-08-07 12:41:19,590 INFO L93 Difference]: Finished difference Result 8075 states and 9764 transitions. [2018-08-07 12:41:19,590 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-08-07 12:41:19,591 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 361 [2018-08-07 12:41:19,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-08-07 12:41:19,611 INFO L225 Difference]: With dead ends: 8075 [2018-08-07 12:41:19,611 INFO L226 Difference]: Without dead ends: 4266 [2018-08-07 12:41:19,626 INFO L603 BasicCegarLoop]: 0 DeclaredPredicates, 1485 GetRequests, 1439 SyntacticMatches, 7 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 563 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=402, Invalid=1238, Unknown=0, NotChecked=0, Total=1640 [2018-08-07 12:41:19,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4266 states. [2018-08-07 12:41:19,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4266 to 4229. [2018-08-07 12:41:19,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4229 states. [2018-08-07 12:41:19,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4229 states to 4229 states and 4860 transitions. [2018-08-07 12:41:19,724 INFO L78 Accepts]: Start accepts. Automaton has 4229 states and 4860 transitions. Word has length 361 [2018-08-07 12:41:19,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-08-07 12:41:19,724 INFO L480 AbstractCegarLoop]: Abstraction has 4229 states and 4860 transitions. [2018-08-07 12:41:19,724 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-08-07 12:41:19,725 INFO L276 IsEmpty]: Start isEmpty. Operand 4229 states and 4860 transitions. [2018-08-07 12:41:19,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 387 [2018-08-07 12:41:19,749 INFO L368 BasicCegarLoop]: Found error trace [2018-08-07 12:41:19,750 INFO L376 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-08-07 12:41:19,750 INFO L423 AbstractCegarLoop]: === Iteration 8 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_false_termination_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-08-07 12:41:19,750 INFO L82 PathProgramCache]: Analyzing trace with hash -660798433, now seen corresponding path program 1 times [2018-08-07 12:41:19,751 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-08-07 12:41:19,751 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:41:19,751 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:41:19,752 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:41:19,752 INFO L292 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-08-07 12:41:19,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:41:20,544 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 257 proven. 184 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-08-07 12:41:20,544 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-08-07 12:41:20,545 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-08-07 12:41:20,554 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:41:20,554 INFO L292 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-08-07 12:41:20,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:41:20,699 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-08-07 12:41:20,910 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 254 proven. 0 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2018-08-07 12:41:20,910 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-08-07 12:41:21,230 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 108 proven. 210 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2018-08-07 12:41:21,250 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-08-07 12:41:21,251 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [12, 5] total 16 [2018-08-07 12:41:21,251 INFO L262 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-08-07 12:41:21,252 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-08-07 12:41:21,252 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-08-07 12:41:21,252 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2018-08-07 12:41:21,252 INFO L87 Difference]: Start difference. First operand 4229 states and 4860 transitions. Second operand 5 states. [2018-08-07 12:41:22,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-08-07 12:41:22,971 INFO L93 Difference]: Finished difference Result 8565 states and 9876 transitions. [2018-08-07 12:41:22,971 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-08-07 12:41:22,971 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 386 [2018-08-07 12:41:22,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-08-07 12:41:22,987 INFO L225 Difference]: With dead ends: 8565 [2018-08-07 12:41:22,987 INFO L226 Difference]: Without dead ends: 4710 [2018-08-07 12:41:22,997 INFO L603 BasicCegarLoop]: 0 DeclaredPredicates, 790 GetRequests, 769 SyntacticMatches, 4 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2018-08-07 12:41:23,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4710 states. [2018-08-07 12:41:23,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4710 to 4702. [2018-08-07 12:41:23,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4702 states. [2018-08-07 12:41:23,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4702 states to 4702 states and 5269 transitions. [2018-08-07 12:41:23,084 INFO L78 Accepts]: Start accepts. Automaton has 4702 states and 5269 transitions. Word has length 386 [2018-08-07 12:41:23,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-08-07 12:41:23,084 INFO L480 AbstractCegarLoop]: Abstraction has 4702 states and 5269 transitions. [2018-08-07 12:41:23,084 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-08-07 12:41:23,085 INFO L276 IsEmpty]: Start isEmpty. Operand 4702 states and 5269 transitions. [2018-08-07 12:41:23,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 498 [2018-08-07 12:41:23,108 INFO L368 BasicCegarLoop]: Found error trace [2018-08-07 12:41:23,108 INFO L376 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-08-07 12:41:23,108 INFO L423 AbstractCegarLoop]: === Iteration 9 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_false_termination_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-08-07 12:41:23,111 INFO L82 PathProgramCache]: Analyzing trace with hash -319997353, now seen corresponding path program 1 times [2018-08-07 12:41:23,111 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-08-07 12:41:23,112 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:41:23,112 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:41:23,112 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:41:23,112 INFO L292 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-08-07 12:41:23,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:41:23,811 INFO L134 CoverageAnalysis]: Checked inductivity of 809 backedges. 376 proven. 112 refuted. 0 times theorem prover too weak. 321 trivial. 0 not checked. [2018-08-07 12:41:23,812 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-08-07 12:41:23,812 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/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 [2018-08-07 12:41:23,823 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:41:23,823 INFO L292 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-08-07 12:41:23,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:41:23,988 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-08-07 12:41:24,302 INFO L134 CoverageAnalysis]: Checked inductivity of 809 backedges. 663 proven. 2 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2018-08-07 12:41:24,302 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-08-07 12:41:24,457 WARN L170 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2018-08-07 12:41:24,859 INFO L134 CoverageAnalysis]: Checked inductivity of 809 backedges. 376 proven. 112 refuted. 0 times theorem prover too weak. 321 trivial. 0 not checked. [2018-08-07 12:41:24,881 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-08-07 12:41:24,881 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/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 [2018-08-07 12:41:24,901 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:41:24,901 INFO L292 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-08-07 12:41:25,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:41:25,260 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-08-07 12:41:25,588 INFO L134 CoverageAnalysis]: Checked inductivity of 809 backedges. 657 proven. 8 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2018-08-07 12:41:25,588 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-08-07 12:41:26,626 INFO L134 CoverageAnalysis]: Checked inductivity of 809 backedges. 376 proven. 112 refuted. 0 times theorem prover too weak. 321 trivial. 0 not checked. [2018-08-07 12:41:26,629 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-08-07 12:41:26,629 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5, 8, 5] total 16 [2018-08-07 12:41:26,629 INFO L255 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-08-07 12:41:26,630 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-08-07 12:41:26,631 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-08-07 12:41:26,631 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2018-08-07 12:41:26,631 INFO L87 Difference]: Start difference. First operand 4702 states and 5269 transitions. Second operand 7 states. [2018-08-07 12:41:28,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-08-07 12:41:28,504 INFO L93 Difference]: Finished difference Result 10212 states and 11667 transitions. [2018-08-07 12:41:28,506 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-08-07 12:41:28,507 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 497 [2018-08-07 12:41:28,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-08-07 12:41:28,532 INFO L225 Difference]: With dead ends: 10212 [2018-08-07 12:41:28,532 INFO L226 Difference]: Without dead ends: 4646 [2018-08-07 12:41:28,555 INFO L603 BasicCegarLoop]: 0 DeclaredPredicates, 2008 GetRequests, 1978 SyntacticMatches, 11 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=107, Invalid=313, Unknown=0, NotChecked=0, Total=420 [2018-08-07 12:41:28,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4646 states. [2018-08-07 12:41:28,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4646 to 4641. [2018-08-07 12:41:28,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4641 states. [2018-08-07 12:41:28,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4641 states to 4641 states and 5164 transitions. [2018-08-07 12:41:28,659 INFO L78 Accepts]: Start accepts. Automaton has 4641 states and 5164 transitions. Word has length 497 [2018-08-07 12:41:28,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-08-07 12:41:28,660 INFO L480 AbstractCegarLoop]: Abstraction has 4641 states and 5164 transitions. [2018-08-07 12:41:28,660 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-08-07 12:41:28,660 INFO L276 IsEmpty]: Start isEmpty. Operand 4641 states and 5164 transitions. [2018-08-07 12:41:28,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 583 [2018-08-07 12:41:28,686 INFO L368 BasicCegarLoop]: Found error trace [2018-08-07 12:41:28,687 INFO L376 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-08-07 12:41:28,687 INFO L423 AbstractCegarLoop]: === Iteration 10 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_false_termination_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-08-07 12:41:28,688 INFO L82 PathProgramCache]: Analyzing trace with hash 1139708073, now seen corresponding path program 1 times [2018-08-07 12:41:28,688 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-08-07 12:41:28,690 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:41:28,690 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:41:28,691 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:41:28,691 INFO L292 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-08-07 12:41:28,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:41:29,273 WARN L170 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2018-08-07 12:41:29,478 WARN L170 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2018-08-07 12:41:30,329 INFO L134 CoverageAnalysis]: Checked inductivity of 1185 backedges. 511 proven. 482 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2018-08-07 12:41:30,330 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-08-07 12:41:30,330 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/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 [2018-08-07 12:41:30,338 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:41:30,338 INFO L292 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-08-07 12:41:30,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:41:30,521 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-08-07 12:41:31,096 INFO L134 CoverageAnalysis]: Checked inductivity of 1185 backedges. 872 proven. 2 refuted. 0 times theorem prover too weak. 311 trivial. 0 not checked. [2018-08-07 12:41:31,096 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-08-07 12:41:31,613 INFO L134 CoverageAnalysis]: Checked inductivity of 1185 backedges. 505 proven. 112 refuted. 0 times theorem prover too weak. 568 trivial. 0 not checked. [2018-08-07 12:41:31,634 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-08-07 12:41:31,634 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/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 [2018-08-07 12:41:31,649 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:41:31,649 INFO L292 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-08-07 12:41:32,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:41:32,059 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-08-07 12:41:32,539 INFO L134 CoverageAnalysis]: Checked inductivity of 1185 backedges. 664 proven. 210 refuted. 0 times theorem prover too weak. 311 trivial. 0 not checked. [2018-08-07 12:41:32,539 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-08-07 12:41:33,323 INFO L134 CoverageAnalysis]: Checked inductivity of 1185 backedges. 216 proven. 690 refuted. 0 times theorem prover too weak. 279 trivial. 0 not checked. [2018-08-07 12:41:33,325 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-08-07 12:41:33,326 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 5, 5, 8, 8] total 16 [2018-08-07 12:41:33,326 INFO L255 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-08-07 12:41:33,327 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-08-07 12:41:33,327 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-08-07 12:41:33,327 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2018-08-07 12:41:33,327 INFO L87 Difference]: Start difference. First operand 4641 states and 5164 transitions. Second operand 13 states. [2018-08-07 12:41:33,955 WARN L170 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 32 [2018-08-07 12:41:36,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-08-07 12:41:36,083 INFO L93 Difference]: Finished difference Result 9068 states and 10377 transitions. [2018-08-07 12:41:36,084 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-08-07 12:41:36,084 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 582 [2018-08-07 12:41:36,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-08-07 12:41:36,099 INFO L225 Difference]: With dead ends: 9068 [2018-08-07 12:41:36,099 INFO L226 Difference]: Without dead ends: 4602 [2018-08-07 12:41:36,110 INFO L603 BasicCegarLoop]: 0 DeclaredPredicates, 2358 GetRequests, 2317 SyntacticMatches, 17 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=183, Invalid=467, Unknown=0, NotChecked=0, Total=650 [2018-08-07 12:41:36,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4602 states. [2018-08-07 12:41:36,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4602 to 4487. [2018-08-07 12:41:36,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4487 states. [2018-08-07 12:41:36,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4487 states to 4487 states and 4889 transitions. [2018-08-07 12:41:36,192 INFO L78 Accepts]: Start accepts. Automaton has 4487 states and 4889 transitions. Word has length 582 [2018-08-07 12:41:36,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-08-07 12:41:36,193 INFO L480 AbstractCegarLoop]: Abstraction has 4487 states and 4889 transitions. [2018-08-07 12:41:36,193 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-08-07 12:41:36,193 INFO L276 IsEmpty]: Start isEmpty. Operand 4487 states and 4889 transitions. [2018-08-07 12:41:36,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 609 [2018-08-07 12:41:36,206 INFO L368 BasicCegarLoop]: Found error trace [2018-08-07 12:41:36,207 INFO L376 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-08-07 12:41:36,207 INFO L423 AbstractCegarLoop]: === Iteration 11 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_false_termination_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-08-07 12:41:36,208 INFO L82 PathProgramCache]: Analyzing trace with hash -1719436843, now seen corresponding path program 2 times [2018-08-07 12:41:36,208 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-08-07 12:41:36,208 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:41:36,209 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:41:36,209 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:41:36,209 INFO L292 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-08-07 12:41:36,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:41:36,928 WARN L170 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2018-08-07 12:41:38,125 INFO L134 CoverageAnalysis]: Checked inductivity of 1288 backedges. 537 proven. 534 refuted. 0 times theorem prover too weak. 217 trivial. 0 not checked. [2018-08-07 12:41:38,125 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-08-07 12:41:38,125 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/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 [2018-08-07 12:41:38,133 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-08-07 12:41:38,133 INFO L292 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-08-07 12:41:38,319 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-08-07 12:41:38,320 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-08-07 12:41:38,329 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-08-07 12:41:39,110 INFO L134 CoverageAnalysis]: Checked inductivity of 1288 backedges. 924 proven. 2 refuted. 0 times theorem prover too weak. 362 trivial. 0 not checked. [2018-08-07 12:41:39,110 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-08-07 12:41:40,160 INFO L134 CoverageAnalysis]: Checked inductivity of 1288 backedges. 531 proven. 112 refuted. 0 times theorem prover too weak. 645 trivial. 0 not checked. [2018-08-07 12:41:40,181 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-08-07 12:41:40,181 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/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 [2018-08-07 12:41:40,198 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-08-07 12:41:40,198 INFO L292 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-08-07 12:41:40,625 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-08-07 12:41:40,625 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-08-07 12:41:40,642 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-08-07 12:41:41,471 INFO L134 CoverageAnalysis]: Checked inductivity of 1288 backedges. 909 proven. 17 refuted. 0 times theorem prover too weak. 362 trivial. 0 not checked. [2018-08-07 12:41:41,471 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-08-07 12:41:41,866 WARN L170 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 25 [2018-08-07 12:41:43,838 INFO L134 CoverageAnalysis]: Checked inductivity of 1288 backedges. 210 proven. 748 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2018-08-07 12:41:43,840 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-08-07 12:41:43,841 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 5, 5, 10, 11] total 31 [2018-08-07 12:41:43,841 INFO L255 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-08-07 12:41:43,842 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-08-07 12:41:43,842 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-08-07 12:41:43,843 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=781, Unknown=0, NotChecked=0, Total=930 [2018-08-07 12:41:43,843 INFO L87 Difference]: Start difference. First operand 4487 states and 4889 transitions. Second operand 18 states. [2018-08-07 12:41:46,074 WARN L170 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 40 [2018-08-07 12:41:47,971 WARN L170 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 50 [2018-08-07 12:41:51,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-08-07 12:41:51,712 INFO L93 Difference]: Finished difference Result 8906 states and 9800 transitions. [2018-08-07 12:41:51,713 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-08-07 12:41:51,713 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 608 [2018-08-07 12:41:51,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-08-07 12:41:51,726 INFO L225 Difference]: With dead ends: 8906 [2018-08-07 12:41:51,726 INFO L226 Difference]: Without dead ends: 4478 [2018-08-07 12:41:51,737 INFO L603 BasicCegarLoop]: 0 DeclaredPredicates, 2497 GetRequests, 2424 SyntacticMatches, 14 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 917 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=686, Invalid=2974, Unknown=0, NotChecked=0, Total=3660 [2018-08-07 12:41:51,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4478 states. [2018-08-07 12:41:51,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4478 to 3833. [2018-08-07 12:41:51,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3833 states. [2018-08-07 12:41:51,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3833 states to 3833 states and 4128 transitions. [2018-08-07 12:41:51,806 INFO L78 Accepts]: Start accepts. Automaton has 3833 states and 4128 transitions. Word has length 608 [2018-08-07 12:41:51,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-08-07 12:41:51,807 INFO L480 AbstractCegarLoop]: Abstraction has 3833 states and 4128 transitions. [2018-08-07 12:41:51,808 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-08-07 12:41:51,808 INFO L276 IsEmpty]: Start isEmpty. Operand 3833 states and 4128 transitions. [2018-08-07 12:41:51,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 683 [2018-08-07 12:41:51,817 INFO L368 BasicCegarLoop]: Found error trace [2018-08-07 12:41:51,817 INFO L376 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-08-07 12:41:51,818 INFO L423 AbstractCegarLoop]: === Iteration 12 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_false_termination_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-08-07 12:41:51,818 INFO L82 PathProgramCache]: Analyzing trace with hash -2131086141, now seen corresponding path program 1 times [2018-08-07 12:41:51,818 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-08-07 12:41:51,819 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:41:51,819 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-08-07 12:41:51,819 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:41:51,819 INFO L292 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-08-07 12:41:51,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:41:52,693 INFO L134 CoverageAnalysis]: Checked inductivity of 1309 backedges. 538 proven. 119 refuted. 0 times theorem prover too weak. 652 trivial. 0 not checked. [2018-08-07 12:41:52,693 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-08-07 12:41:52,693 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/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 [2018-08-07 12:41:52,702 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:41:52,702 INFO L292 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-08-07 12:41:52,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:41:52,905 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-08-07 12:41:53,227 INFO L134 CoverageAnalysis]: Checked inductivity of 1309 backedges. 945 proven. 2 refuted. 0 times theorem prover too weak. 362 trivial. 0 not checked. [2018-08-07 12:41:53,228 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-08-07 12:41:53,576 INFO L134 CoverageAnalysis]: Checked inductivity of 1309 backedges. 538 proven. 119 refuted. 0 times theorem prover too weak. 652 trivial. 0 not checked. [2018-08-07 12:41:53,597 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-08-07 12:41:53,598 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/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 [2018-08-07 12:41:53,613 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:41:53,613 INFO L292 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-08-07 12:41:54,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:41:54,102 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-08-07 12:41:54,437 INFO L134 CoverageAnalysis]: Checked inductivity of 1309 backedges. 945 proven. 2 refuted. 0 times theorem prover too weak. 362 trivial. 0 not checked. [2018-08-07 12:41:54,437 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-08-07 12:41:54,796 INFO L134 CoverageAnalysis]: Checked inductivity of 1309 backedges. 538 proven. 119 refuted. 0 times theorem prover too weak. 652 trivial. 0 not checked. [2018-08-07 12:41:54,798 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-08-07 12:41:54,798 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 9 [2018-08-07 12:41:54,798 INFO L255 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-08-07 12:41:54,799 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-08-07 12:41:54,799 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-08-07 12:41:54,800 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2018-08-07 12:41:54,800 INFO L87 Difference]: Start difference. First operand 3833 states and 4128 transitions. Second operand 7 states. [2018-08-07 12:41:56,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-08-07 12:41:56,594 INFO L93 Difference]: Finished difference Result 10497 states and 12094 transitions. [2018-08-07 12:41:56,594 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-08-07 12:41:56,594 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 682 [2018-08-07 12:41:56,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-08-07 12:41:56,622 INFO L225 Difference]: With dead ends: 10497 [2018-08-07 12:41:56,623 INFO L226 Difference]: Without dead ends: 6855 [2018-08-07 12:41:56,636 INFO L603 BasicCegarLoop]: 0 DeclaredPredicates, 2741 GetRequests, 2727 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2018-08-07 12:41:56,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6855 states. [2018-08-07 12:41:56,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6855 to 6560. [2018-08-07 12:41:56,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6560 states. [2018-08-07 12:41:56,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6560 states to 6560 states and 7114 transitions. [2018-08-07 12:41:56,773 INFO L78 Accepts]: Start accepts. Automaton has 6560 states and 7114 transitions. Word has length 682 [2018-08-07 12:41:56,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-08-07 12:41:56,774 INFO L480 AbstractCegarLoop]: Abstraction has 6560 states and 7114 transitions. [2018-08-07 12:41:56,774 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-08-07 12:41:56,774 INFO L276 IsEmpty]: Start isEmpty. Operand 6560 states and 7114 transitions. [2018-08-07 12:41:56,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 772 [2018-08-07 12:41:56,788 INFO L368 BasicCegarLoop]: Found error trace [2018-08-07 12:41:56,789 INFO L376 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-08-07 12:41:56,789 INFO L423 AbstractCegarLoop]: === Iteration 13 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_false_termination_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-08-07 12:41:56,789 INFO L82 PathProgramCache]: Analyzing trace with hash -1778092474, now seen corresponding path program 1 times [2018-08-07 12:41:56,790 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-08-07 12:41:56,790 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:41:56,790 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:41:56,791 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:41:56,791 INFO L292 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-08-07 12:41:56,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:41:59,107 INFO L134 CoverageAnalysis]: Checked inductivity of 2223 backedges. 789 proven. 835 refuted. 0 times theorem prover too weak. 599 trivial. 0 not checked. [2018-08-07 12:41:59,107 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-08-07 12:41:59,107 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/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 [2018-08-07 12:41:59,115 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:41:59,115 INFO L292 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-08-07 12:41:59,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:41:59,361 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-08-07 12:42:00,209 INFO L134 CoverageAnalysis]: Checked inductivity of 2223 backedges. 1323 proven. 2 refuted. 0 times theorem prover too weak. 898 trivial. 0 not checked. [2018-08-07 12:42:00,210 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-08-07 12:42:00,378 WARN L170 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 37 [2018-08-07 12:42:00,544 WARN L170 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-08-07 12:42:01,316 INFO L134 CoverageAnalysis]: Checked inductivity of 2223 backedges. 777 proven. 112 refuted. 0 times theorem prover too weak. 1334 trivial. 0 not checked. [2018-08-07 12:42:01,338 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-08-07 12:42:01,339 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/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 [2018-08-07 12:42:01,355 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:42:01,355 INFO L292 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-08-07 12:42:01,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:42:01,886 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-08-07 12:42:02,415 INFO L134 CoverageAnalysis]: Checked inductivity of 2223 backedges. 1315 proven. 10 refuted. 0 times theorem prover too weak. 898 trivial. 0 not checked. [2018-08-07 12:42:02,416 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-08-07 12:42:03,866 INFO L134 CoverageAnalysis]: Checked inductivity of 2223 backedges. 282 proven. 1075 refuted. 0 times theorem prover too weak. 866 trivial. 0 not checked. [2018-08-07 12:42:03,870 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-08-07 12:42:03,871 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 5, 5, 8, 8] total 28 [2018-08-07 12:42:03,871 INFO L255 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-08-07 12:42:03,872 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-08-07 12:42:03,873 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-08-07 12:42:03,873 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=618, Unknown=0, NotChecked=0, Total=756 [2018-08-07 12:42:03,874 INFO L87 Difference]: Start difference. First operand 6560 states and 7114 transitions. Second operand 17 states. [2018-08-07 12:42:11,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-08-07 12:42:11,067 INFO L93 Difference]: Finished difference Result 12369 states and 13865 transitions. [2018-08-07 12:42:11,072 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-08-07 12:42:11,073 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 771 [2018-08-07 12:42:11,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-08-07 12:42:11,090 INFO L225 Difference]: With dead ends: 12369 [2018-08-07 12:42:11,090 INFO L226 Difference]: Without dead ends: 5198 [2018-08-07 12:42:11,109 INFO L603 BasicCegarLoop]: 0 DeclaredPredicates, 3157 GetRequests, 3085 SyntacticMatches, 7 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1180 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=985, Invalid=3437, Unknown=0, NotChecked=0, Total=4422 [2018-08-07 12:42:11,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5198 states. [2018-08-07 12:42:11,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5198 to 4955. [2018-08-07 12:42:11,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4955 states. [2018-08-07 12:42:11,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4955 states to 4955 states and 5335 transitions. [2018-08-07 12:42:11,205 INFO L78 Accepts]: Start accepts. Automaton has 4955 states and 5335 transitions. Word has length 771 [2018-08-07 12:42:11,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-08-07 12:42:11,206 INFO L480 AbstractCegarLoop]: Abstraction has 4955 states and 5335 transitions. [2018-08-07 12:42:11,206 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-08-07 12:42:11,206 INFO L276 IsEmpty]: Start isEmpty. Operand 4955 states and 5335 transitions. [2018-08-07 12:42:11,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 843 [2018-08-07 12:42:11,217 INFO L368 BasicCegarLoop]: Found error trace [2018-08-07 12:42:11,217 INFO L376 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-08-07 12:42:11,218 INFO L423 AbstractCegarLoop]: === Iteration 14 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_false_termination_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-08-07 12:42:11,218 INFO L82 PathProgramCache]: Analyzing trace with hash -1023332526, now seen corresponding path program 1 times [2018-08-07 12:42:11,218 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-08-07 12:42:11,219 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:42:11,219 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:42:11,219 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:42:11,219 INFO L292 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-08-07 12:42:11,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:42:14,092 INFO L134 CoverageAnalysis]: Checked inductivity of 1964 backedges. 785 proven. 845 refuted. 0 times theorem prover too weak. 334 trivial. 0 not checked. [2018-08-07 12:42:14,092 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-08-07 12:42:14,093 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/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 [2018-08-07 12:42:14,102 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:42:14,102 INFO L292 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-08-07 12:42:14,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:42:14,350 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-08-07 12:42:14,678 INFO L134 CoverageAnalysis]: Checked inductivity of 1964 backedges. 1264 proven. 2 refuted. 0 times theorem prover too weak. 698 trivial. 0 not checked. [2018-08-07 12:42:14,679 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-08-07 12:42:15,274 INFO L134 CoverageAnalysis]: Checked inductivity of 1964 backedges. 742 proven. 119 refuted. 0 times theorem prover too weak. 1103 trivial. 0 not checked. [2018-08-07 12:42:15,295 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-08-07 12:42:15,296 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/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 [2018-08-07 12:42:15,311 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:42:15,311 INFO L292 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-08-07 12:42:15,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:42:15,868 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-08-07 12:42:16,179 INFO L134 CoverageAnalysis]: Checked inductivity of 1964 backedges. 1264 proven. 2 refuted. 0 times theorem prover too weak. 698 trivial. 0 not checked. [2018-08-07 12:42:16,179 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-08-07 12:42:16,600 INFO L134 CoverageAnalysis]: Checked inductivity of 1964 backedges. 742 proven. 119 refuted. 0 times theorem prover too weak. 1103 trivial. 0 not checked. [2018-08-07 12:42:16,604 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-08-07 12:42:16,604 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 5, 5, 5, 5] total 22 [2018-08-07 12:42:16,604 INFO L255 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-08-07 12:42:16,605 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-08-07 12:42:16,606 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-08-07 12:42:16,606 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2018-08-07 12:42:16,606 INFO L87 Difference]: Start difference. First operand 4955 states and 5335 transitions. Second operand 20 states. [2018-08-07 12:42:28,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-08-07 12:42:28,493 INFO L93 Difference]: Finished difference Result 10426 states and 11335 transitions. [2018-08-07 12:42:28,494 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-08-07 12:42:28,494 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 842 [2018-08-07 12:42:28,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-08-07 12:42:28,511 INFO L225 Difference]: With dead ends: 10426 [2018-08-07 12:42:28,511 INFO L226 Difference]: Without dead ends: 5331 [2018-08-07 12:42:28,521 INFO L603 BasicCegarLoop]: 0 DeclaredPredicates, 3496 GetRequests, 3405 SyntacticMatches, 12 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2163 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=1017, Invalid=5463, Unknown=0, NotChecked=0, Total=6480 [2018-08-07 12:42:28,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5331 states. [2018-08-07 12:42:28,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5331 to 5076. [2018-08-07 12:42:28,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5076 states. [2018-08-07 12:42:28,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5076 states to 5076 states and 5400 transitions. [2018-08-07 12:42:28,612 INFO L78 Accepts]: Start accepts. Automaton has 5076 states and 5400 transitions. Word has length 842 [2018-08-07 12:42:28,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-08-07 12:42:28,614 INFO L480 AbstractCegarLoop]: Abstraction has 5076 states and 5400 transitions. [2018-08-07 12:42:28,614 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-08-07 12:42:28,614 INFO L276 IsEmpty]: Start isEmpty. Operand 5076 states and 5400 transitions. [2018-08-07 12:42:28,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1100 [2018-08-07 12:42:28,630 INFO L368 BasicCegarLoop]: Found error trace [2018-08-07 12:42:28,631 INFO L376 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-08-07 12:42:28,631 INFO L423 AbstractCegarLoop]: === Iteration 15 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_false_termination_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-08-07 12:42:28,631 INFO L82 PathProgramCache]: Analyzing trace with hash -2144701740, now seen corresponding path program 1 times [2018-08-07 12:42:28,632 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-08-07 12:42:28,632 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:42:28,633 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:42:28,633 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:42:28,633 INFO L292 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-08-07 12:42:28,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:42:30,087 WARN L170 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 30 [2018-08-07 12:42:30,277 WARN L170 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 35 [2018-08-07 12:42:30,489 WARN L170 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 42 [2018-08-07 12:42:30,637 WARN L170 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 34 [2018-08-07 12:42:30,822 WARN L170 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 44 [2018-08-07 12:42:34,928 INFO L134 CoverageAnalysis]: Checked inductivity of 3758 backedges. 1209 proven. 2383 refuted. 0 times theorem prover too weak. 166 trivial. 0 not checked. [2018-08-07 12:42:34,928 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-08-07 12:42:34,929 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/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 [2018-08-07 12:42:34,936 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:42:34,936 INFO L292 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-08-07 12:42:35,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:42:35,274 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-08-07 12:42:36,274 INFO L134 CoverageAnalysis]: Checked inductivity of 3758 backedges. 1161 proven. 2 refuted. 0 times theorem prover too weak. 2595 trivial. 0 not checked. [2018-08-07 12:42:36,274 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-08-07 12:42:37,841 INFO L134 CoverageAnalysis]: Checked inductivity of 3758 backedges. 1161 proven. 2 refuted. 0 times theorem prover too weak. 2595 trivial. 0 not checked. [2018-08-07 12:42:37,862 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-08-07 12:42:37,863 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/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 [2018-08-07 12:42:37,877 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:42:37,878 INFO L292 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-08-07 12:42:38,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:42:38,652 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-08-07 12:42:40,000 INFO L134 CoverageAnalysis]: Checked inductivity of 3758 backedges. 2274 proven. 6 refuted. 0 times theorem prover too weak. 1478 trivial. 0 not checked. [2018-08-07 12:42:40,001 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-08-07 12:42:41,431 INFO L134 CoverageAnalysis]: Checked inductivity of 3758 backedges. 1528 proven. 271 refuted. 0 times theorem prover too weak. 1959 trivial. 0 not checked. [2018-08-07 12:42:41,435 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-08-07 12:42:41,436 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 5, 5, 7, 8] total 50 [2018-08-07 12:42:41,436 INFO L255 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-08-07 12:42:41,438 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-08-07 12:42:41,439 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-08-07 12:42:41,440 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=225, Invalid=2225, Unknown=0, NotChecked=0, Total=2450 [2018-08-07 12:42:41,441 INFO L87 Difference]: Start difference. First operand 5076 states and 5400 transitions. Second operand 37 states. [2018-08-07 12:42:43,321 WARN L170 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 41 [2018-08-07 12:42:45,116 WARN L170 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 38 [2018-08-07 12:42:46,177 WARN L170 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 50 [2018-08-07 12:42:46,489 WARN L170 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 43 [2018-08-07 12:42:47,209 WARN L170 SmtUtils]: Spent 402.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 45 [2018-08-07 12:42:47,424 WARN L170 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 34 [2018-08-07 12:42:50,076 WARN L170 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 45 [2018-08-07 12:42:52,331 WARN L170 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 54 [2018-08-07 12:42:52,864 WARN L170 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 29 [2018-08-07 12:42:54,009 WARN L170 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 51 [2018-08-07 12:42:54,294 WARN L170 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 43 [2018-08-07 12:42:55,893 WARN L170 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 28 [2018-08-07 12:42:56,328 WARN L170 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 48 [2018-08-07 12:42:56,685 WARN L170 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 46 [2018-08-07 12:42:58,385 WARN L170 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 44 [2018-08-07 12:42:59,039 WARN L170 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 47 [2018-08-07 12:42:59,421 WARN L170 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 44 [2018-08-07 12:42:59,829 WARN L170 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 27 [2018-08-07 12:43:01,356 WARN L170 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 41 [2018-08-07 12:43:01,845 WARN L170 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 40 [2018-08-07 12:43:03,093 WARN L170 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 51 [2018-08-07 12:43:03,437 WARN L170 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 49 [2018-08-07 12:43:04,596 WARN L170 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 48 [2018-08-07 12:43:07,251 WARN L170 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 33 [2018-08-07 12:43:08,610 WARN L170 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 40 [2018-08-07 12:43:08,983 WARN L170 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 26 [2018-08-07 12:43:10,579 WARN L170 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 30 [2018-08-07 12:43:11,018 WARN L170 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 41 [2018-08-07 12:43:14,453 WARN L170 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 35 [2018-08-07 12:43:14,672 WARN L170 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 33 [2018-08-07 12:43:15,371 WARN L170 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 42 [2018-08-07 12:43:16,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-08-07 12:43:16,130 INFO L93 Difference]: Finished difference Result 11957 states and 13504 transitions. [2018-08-07 12:43:16,131 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2018-08-07 12:43:16,131 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 1099 [2018-08-07 12:43:16,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-08-07 12:43:16,152 INFO L225 Difference]: With dead ends: 11957 [2018-08-07 12:43:16,152 INFO L226 Difference]: Without dead ends: 6661 [2018-08-07 12:43:16,168 INFO L603 BasicCegarLoop]: 0 DeclaredPredicates, 4584 GetRequests, 4421 SyntacticMatches, 7 SemanticMatches, 156 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7784 ImplicationChecksByTransitivity, 17.9s TimeCoverageRelationStatistics Valid=3337, Invalid=21469, Unknown=0, NotChecked=0, Total=24806 [2018-08-07 12:43:16,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6661 states. [2018-08-07 12:43:16,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6661 to 5806. [2018-08-07 12:43:16,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5806 states. [2018-08-07 12:43:16,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5806 states to 5806 states and 6161 transitions. [2018-08-07 12:43:16,347 INFO L78 Accepts]: Start accepts. Automaton has 5806 states and 6161 transitions. Word has length 1099 [2018-08-07 12:43:16,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-08-07 12:43:16,348 INFO L480 AbstractCegarLoop]: Abstraction has 5806 states and 6161 transitions. [2018-08-07 12:43:16,348 INFO L481 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-08-07 12:43:16,348 INFO L276 IsEmpty]: Start isEmpty. Operand 5806 states and 6161 transitions. [2018-08-07 12:43:16,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1148 [2018-08-07 12:43:16,365 INFO L368 BasicCegarLoop]: Found error trace [2018-08-07 12:43:16,366 INFO L376 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-08-07 12:43:16,366 INFO L423 AbstractCegarLoop]: === Iteration 16 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_false_termination_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-08-07 12:43:16,366 INFO L82 PathProgramCache]: Analyzing trace with hash -1115635660, now seen corresponding path program 1 times [2018-08-07 12:43:16,367 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-08-07 12:43:16,367 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:43:16,367 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:43:16,368 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:43:16,368 INFO L292 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-08-07 12:43:16,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:43:17,806 INFO L134 CoverageAnalysis]: Checked inductivity of 3995 backedges. 1677 proven. 355 refuted. 0 times theorem prover too weak. 1963 trivial. 0 not checked. [2018-08-07 12:43:17,806 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-08-07 12:43:17,806 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/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 [2018-08-07 12:43:17,817 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:43:17,818 INFO L292 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-08-07 12:43:18,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:43:18,172 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-08-07 12:43:18,676 INFO L134 CoverageAnalysis]: Checked inductivity of 3995 backedges. 2463 proven. 6 refuted. 0 times theorem prover too weak. 1526 trivial. 0 not checked. [2018-08-07 12:43:18,676 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-08-07 12:43:19,693 INFO L134 CoverageAnalysis]: Checked inductivity of 3995 backedges. 1677 proven. 359 refuted. 0 times theorem prover too weak. 1959 trivial. 0 not checked. [2018-08-07 12:43:19,715 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-08-07 12:43:19,715 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/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 [2018-08-07 12:43:19,731 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:43:19,731 INFO L292 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-08-07 12:43:20,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:43:20,522 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-08-07 12:43:21,047 INFO L134 CoverageAnalysis]: Checked inductivity of 3995 backedges. 2463 proven. 6 refuted. 0 times theorem prover too weak. 1526 trivial. 0 not checked. [2018-08-07 12:43:21,048 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-08-07 12:43:21,848 INFO L134 CoverageAnalysis]: Checked inductivity of 3995 backedges. 1677 proven. 359 refuted. 0 times theorem prover too weak. 1959 trivial. 0 not checked. [2018-08-07 12:43:21,851 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-08-07 12:43:21,853 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8, 7, 8] total 14 [2018-08-07 12:43:21,853 INFO L255 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-08-07 12:43:21,854 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-08-07 12:43:21,854 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-08-07 12:43:21,854 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2018-08-07 12:43:21,854 INFO L87 Difference]: Start difference. First operand 5806 states and 6161 transitions. Second operand 9 states. [2018-08-07 12:43:24,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-08-07 12:43:24,546 INFO L93 Difference]: Finished difference Result 12770 states and 13634 transitions. [2018-08-07 12:43:24,546 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-08-07 12:43:24,546 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 1147 [2018-08-07 12:43:24,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-08-07 12:43:24,570 INFO L225 Difference]: With dead ends: 12770 [2018-08-07 12:43:24,571 INFO L226 Difference]: Without dead ends: 7155 [2018-08-07 12:43:24,585 INFO L603 BasicCegarLoop]: 0 DeclaredPredicates, 4614 GetRequests, 4588 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2018-08-07 12:43:24,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7155 states. [2018-08-07 12:43:24,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7155 to 6535. [2018-08-07 12:43:24,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6535 states. [2018-08-07 12:43:24,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6535 states to 6535 states and 6933 transitions. [2018-08-07 12:43:24,774 INFO L78 Accepts]: Start accepts. Automaton has 6535 states and 6933 transitions. Word has length 1147 [2018-08-07 12:43:24,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-08-07 12:43:24,775 INFO L480 AbstractCegarLoop]: Abstraction has 6535 states and 6933 transitions. [2018-08-07 12:43:24,775 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-08-07 12:43:24,775 INFO L276 IsEmpty]: Start isEmpty. Operand 6535 states and 6933 transitions. [2018-08-07 12:43:24,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1705 [2018-08-07 12:43:24,805 INFO L368 BasicCegarLoop]: Found error trace [2018-08-07 12:43:24,806 INFO L376 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 9, 9, 9, 8, 8, 8, 8, 7, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-08-07 12:43:24,806 INFO L423 AbstractCegarLoop]: === Iteration 17 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_false_termination_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-08-07 12:43:24,807 INFO L82 PathProgramCache]: Analyzing trace with hash 752859877, now seen corresponding path program 1 times [2018-08-07 12:43:24,807 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-08-07 12:43:24,807 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:43:24,808 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:43:24,808 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:43:24,808 INFO L292 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-08-07 12:43:24,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:43:26,810 WARN L170 SmtUtils]: Spent 613.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 19 [2018-08-07 12:43:27,110 WARN L170 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 24 [2018-08-07 12:43:31,674 INFO L134 CoverageAnalysis]: Checked inductivity of 8916 backedges. 1940 proven. 5325 refuted. 0 times theorem prover too weak. 1651 trivial. 0 not checked. [2018-08-07 12:43:31,674 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-08-07 12:43:31,674 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/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 [2018-08-07 12:43:31,683 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:43:31,683 INFO L292 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-08-07 12:43:32,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:43:32,214 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-08-07 12:43:33,535 INFO L134 CoverageAnalysis]: Checked inductivity of 8916 backedges. 2874 proven. 85 refuted. 0 times theorem prover too weak. 5957 trivial. 0 not checked. [2018-08-07 12:43:33,535 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-08-07 12:43:36,976 INFO L134 CoverageAnalysis]: Checked inductivity of 8916 backedges. 2950 proven. 122 refuted. 0 times theorem prover too weak. 5844 trivial. 0 not checked. [2018-08-07 12:43:36,997 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-08-07 12:43:36,998 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/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 [2018-08-07 12:43:37,014 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:43:37,014 INFO L292 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-08-07 12:43:38,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:43:38,211 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-08-07 12:43:39,569 INFO L134 CoverageAnalysis]: Checked inductivity of 8916 backedges. 2874 proven. 85 refuted. 0 times theorem prover too weak. 5957 trivial. 0 not checked. [2018-08-07 12:43:39,569 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-08-07 12:43:42,523 INFO L134 CoverageAnalysis]: Checked inductivity of 8916 backedges. 2950 proven. 122 refuted. 0 times theorem prover too weak. 5844 trivial. 0 not checked. [2018-08-07 12:43:42,526 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-08-07 12:43:42,528 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 8, 9, 8, 9] total 39 [2018-08-07 12:43:42,528 INFO L255 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-08-07 12:43:42,529 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-08-07 12:43:42,530 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-08-07 12:43:42,530 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=1314, Unknown=0, NotChecked=0, Total=1482 [2018-08-07 12:43:42,530 INFO L87 Difference]: Start difference. First operand 6535 states and 6933 transitions. Second operand 33 states. [2018-08-07 12:43:46,117 WARN L170 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 56 [2018-08-07 12:43:46,323 WARN L170 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 47 [2018-08-07 12:43:47,166 WARN L170 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 40 [2018-08-07 12:43:49,301 WARN L170 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 53 [2018-08-07 12:43:50,225 WARN L170 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 50 [2018-08-07 12:43:52,942 WARN L170 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 44 [2018-08-07 12:43:57,150 WARN L170 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 31 [2018-08-07 12:43:57,472 WARN L170 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 43 [2018-08-07 12:44:03,703 WARN L170 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 56 [2018-08-07 12:44:06,317 WARN L170 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 44 [2018-08-07 12:44:07,585 WARN L170 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 31 [2018-08-07 12:44:10,692 WARN L170 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 57 [2018-08-07 12:44:14,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-08-07 12:44:14,124 INFO L93 Difference]: Finished difference Result 14089 states and 14959 transitions. [2018-08-07 12:44:14,124 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2018-08-07 12:44:14,124 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 1704 [2018-08-07 12:44:14,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-08-07 12:44:14,139 INFO L225 Difference]: With dead ends: 14089 [2018-08-07 12:44:14,139 INFO L226 Difference]: Without dead ends: 6845 [2018-08-07 12:44:14,154 INFO L603 BasicCegarLoop]: 0 DeclaredPredicates, 7003 GetRequests, 6852 SyntacticMatches, 6 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6870 ImplicationChecksByTransitivity, 12.3s TimeCoverageRelationStatistics Valid=3440, Invalid=18022, Unknown=0, NotChecked=0, Total=21462 [2018-08-07 12:44:14,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6845 states. [2018-08-07 12:44:14,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6845 to 6023. [2018-08-07 12:44:14,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6023 states. [2018-08-07 12:44:14,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6023 states to 6023 states and 6338 transitions. [2018-08-07 12:44:14,286 INFO L78 Accepts]: Start accepts. Automaton has 6023 states and 6338 transitions. Word has length 1704 [2018-08-07 12:44:14,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-08-07 12:44:14,287 INFO L480 AbstractCegarLoop]: Abstraction has 6023 states and 6338 transitions. [2018-08-07 12:44:14,287 INFO L481 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-08-07 12:44:14,287 INFO L276 IsEmpty]: Start isEmpty. Operand 6023 states and 6338 transitions. [2018-08-07 12:44:14,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2219 [2018-08-07 12:44:14,319 INFO L368 BasicCegarLoop]: Found error trace [2018-08-07 12:44:14,320 INFO L376 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 16, 16, 16, 15, 15, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 13, 12, 12, 12, 11, 11, 11, 11, 10, 9, 8, 8, 8, 8, 8, 8, 7, 7, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-08-07 12:44:14,320 INFO L423 AbstractCegarLoop]: === Iteration 18 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_false_termination_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-08-07 12:44:14,321 INFO L82 PathProgramCache]: Analyzing trace with hash 765678853, now seen corresponding path program 1 times [2018-08-07 12:44:14,321 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-08-07 12:44:14,322 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:44:14,322 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:44:14,322 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:44:14,322 INFO L292 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-08-07 12:44:14,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:44:18,523 INFO L134 CoverageAnalysis]: Checked inductivity of 15347 backedges. 6765 proven. 2405 refuted. 0 times theorem prover too weak. 6177 trivial. 0 not checked. [2018-08-07 12:44:18,523 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-08-07 12:44:18,523 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/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 [2018-08-07 12:44:18,534 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:44:18,534 INFO L292 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-08-07 12:44:19,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:44:19,193 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-08-07 12:44:20,851 INFO L134 CoverageAnalysis]: Checked inductivity of 15347 backedges. 5675 proven. 2 refuted. 0 times theorem prover too weak. 9670 trivial. 0 not checked. [2018-08-07 12:44:20,852 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-08-07 12:44:23,286 INFO L134 CoverageAnalysis]: Checked inductivity of 15347 backedges. 2533 proven. 244 refuted. 0 times theorem prover too weak. 12570 trivial. 0 not checked. [2018-08-07 12:44:23,308 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-08-07 12:44:23,308 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/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 [2018-08-07 12:44:23,323 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:44:23,323 INFO L292 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-08-07 12:44:24,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:44:24,811 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-08-07 12:44:26,859 INFO L134 CoverageAnalysis]: Checked inductivity of 15347 backedges. 9907 proven. 30 refuted. 0 times theorem prover too weak. 5410 trivial. 0 not checked. [2018-08-07 12:44:26,859 INFO L316 TraceCheckSpWp]: Computing backward predicates... Received shutdown request... [2018-08-07 12:44:31,012 INFO L134 CoverageAnalysis]: Checked inductivity of 15347 backedges. 6779 proven. 1804 refuted. 0 times theorem prover too weak. 6764 trivial. 0 not checked. [2018-08-07 12:44:31,015 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-08-07 12:44:31,017 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5, 5, 5] total 11 [2018-08-07 12:44:31,017 INFO L255 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-08-07 12:44:31,019 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-08-07 12:44:31,019 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-08-07 12:44:31,019 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2018-08-07 12:44:31,019 INFO L87 Difference]: Start difference. First operand 6023 states and 6338 transitions. Second operand 10 states. [2018-08-07 12:44:31,020 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-08-07 12:44:31,020 WARN L549 AbstractCegarLoop]: Verification canceled [2018-08-07 12:44:31,026 WARN L202 ceAbstractionStarter]: Timeout [2018-08-07 12:44:31,026 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.08 12:44:31 BoogieIcfgContainer [2018-08-07 12:44:31,026 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-08-07 12:44:31,027 INFO L168 Benchmark]: Toolchain (without parser) took 234033.28 ms. Allocated memory was 1.5 GB in the beginning and 4.1 GB in the end (delta: 2.6 GB). Free memory was 1.4 GB in the beginning and 1.8 GB in the end (delta: -394.8 MB). Peak memory consumption was 2.2 GB. Max. memory is 7.1 GB. [2018-08-07 12:44:31,028 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-08-07 12:44:31,029 INFO L168 Benchmark]: CACSL2BoogieTranslator took 783.88 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 52.8 MB). Peak memory consumption was 52.8 MB. Max. memory is 7.1 GB. [2018-08-07 12:44:31,029 INFO L168 Benchmark]: Boogie Procedure Inliner took 145.10 ms. Allocated memory is still 1.5 GB. Free memory was 1.3 GB in the beginning and 1.3 GB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. [2018-08-07 12:44:31,030 INFO L168 Benchmark]: Boogie Preprocessor took 329.87 ms. Allocated memory was 1.5 GB in the beginning and 2.2 GB in the end (delta: 733.5 MB). Free memory was 1.3 GB in the beginning and 2.2 GB in the end (delta: -843.0 MB). Peak memory consumption was 37.7 MB. Max. memory is 7.1 GB. [2018-08-07 12:44:31,031 INFO L168 Benchmark]: RCFGBuilder took 3768.19 ms. Allocated memory is still 2.2 GB. Free memory was 2.2 GB in the beginning and 2.0 GB in the end (delta: 159.7 MB). Peak memory consumption was 159.7 MB. Max. memory is 7.1 GB. [2018-08-07 12:44:31,031 INFO L168 Benchmark]: TraceAbstraction took 228999.42 ms. Allocated memory was 2.2 GB in the beginning and 4.1 GB in the end (delta: 1.9 GB). Free memory was 2.0 GB in the beginning and 1.8 GB in the end (delta: 225.1 MB). Peak memory consumption was 2.1 GB. Max. memory is 7.1 GB. [2018-08-07 12:44:31,035 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 783.88 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 52.8 MB). Peak memory consumption was 52.8 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 145.10 ms. Allocated memory is still 1.5 GB. Free memory was 1.3 GB in the beginning and 1.3 GB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 329.87 ms. Allocated memory was 1.5 GB in the beginning and 2.2 GB in the end (delta: 733.5 MB). Free memory was 1.3 GB in the beginning and 2.2 GB in the end (delta: -843.0 MB). Peak memory consumption was 37.7 MB. Max. memory is 7.1 GB. * RCFGBuilder took 3768.19 ms. Allocated memory is still 2.2 GB. Free memory was 2.2 GB in the beginning and 2.0 GB in the end (delta: 159.7 MB). Peak memory consumption was 159.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 228999.42 ms. Allocated memory was 2.2 GB in the beginning and 4.1 GB in the end (delta: 1.9 GB). Free memory was 2.0 GB in the beginning and 1.8 GB in the end (delta: 225.1 MB). Peak memory consumption was 2.1 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 112]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 112). Cancelled while BasicCegarLoop was constructing difference of abstraction (6023states) and FLOYD_HOARE automaton (currently 2 states, 10 states before enhancement), while ReachableStatesComputation was computing reachable states (1 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 255 locations, 1 error locations. TIMEOUT Result, 228.9s OverallTime, 18 OverallIterations, 18 TraceHistogramMax, 127.6s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 1594 SDtfs, 57127 SDslu, 4939 SDs, 0 SdLazy, 71725 SolverSat, 7275 SolverUnsat, 1 SolverUnknown, 0 SolverNotchecked, 77.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 46369 GetRequests, 45540 SyntacticMatches, 131 SemanticMatches, 698 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20268 ImplicationChecksByTransitivity, 54.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=6560occurred in iteration=12, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 1.8s AutomataMinimizationTime, 17 MinimizatonAttempts, 4620 StatesRemovedByMinimization, 15 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 1.1s SsaConstructionTime, 11.1s SatisfiabilityAnalysisTime, 69.8s InterpolantComputationTime, 34762 NumberOfCodeBlocks, 34762 NumberOfCodeBlocksAsserted, 48 NumberOfCheckSat, 57436 ConstructedInterpolants, 12 QuantifiedInterpolants, 236778468 SizeOfPredicates, 72 NumberOfNonLiveVariables, 32528 ConjunctsInSsa, 452 ConjunctsInUnsatCore, 74 InterpolantComputations, 6 PerfectInterpolantSequences, 187485/209625 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/Problem14_label45_true-unreach-call_false-termination.c_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-Benchmark-0-2018-08-07_12-44-31-048.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/Problem14_label45_true-unreach-call_false-termination.c_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-08-07_12-44-31-048.csv Completed graceful shutdown