java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/ai/svcomp-Reach-32bit-Automizer_Default+AIv2_INT.epf -i ../../../trunk/examples/svcomp/loop-acceleration/const_1-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-efa34d5 [2019-09-16 17:03:06,118 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-16 17:03:06,120 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-16 17:03:06,139 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-09-16 17:03:06,164 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-16 17:03:06,166 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-16 17:03:06,168 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-16 17:03:06,171 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-16 17:03:06,172 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-16 17:03:06,174 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-16 17:03:06,176 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-16 17:03:06,181 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-16 17:03:06,185 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-16 17:03:06,187 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-16 17:03:06,190 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-16 17:03:06,191 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-16 17:03:06,193 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-09-16 17:03:06,198 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-09-16 17:03:06,199 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-09-16 17:03:06,200 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-09-16 17:03:06,200 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-09-16 17:03:06,202 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-09-16 17:03:06,203 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-09-16 17:03:06,203 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-09-16 17:03:06,204 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-09-16 17:03:06,204 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-16 17:03:06,205 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-16 17:03:06,205 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-16 17:03:06,207 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/svcomp-Reach-32bit-Automizer_Default+AIv2_INT.epf [2019-09-16 17:03:06,244 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-16 17:03:06,245 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-16 17:03:06,245 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-09-16 17:03:06,245 INFO L138 SettingsManager]: * Log level for plugins=info [2019-09-16 17:03:06,246 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-09-16 17:03:06,249 INFO L138 SettingsManager]: * User list type=DISABLED [2019-09-16 17:03:06,250 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-09-16 17:03:06,250 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-09-16 17:03:06,250 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-09-16 17:03:06,250 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-09-16 17:03:06,251 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-16 17:03:06,251 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-16 17:03:06,252 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-16 17:03:06,252 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-16 17:03:06,255 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-16 17:03:06,255 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-16 17:03:06,256 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-16 17:03:06,256 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-16 17:03:06,256 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-16 17:03:06,256 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-16 17:03:06,257 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-16 17:03:06,257 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-09-16 17:03:06,257 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-16 17:03:06,258 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-16 17:03:06,258 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-16 17:03:06,258 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-16 17:03:06,258 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-09-16 17:03:06,259 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-16 17:03:06,259 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-16 17:03:06,259 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-09-16 17:03:06,288 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-16 17:03:06,306 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-16 17:03:06,311 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-16 17:03:06,313 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-16 17:03:06,313 INFO L275 PluginConnector]: CDTParser initialized [2019-09-16 17:03:06,314 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/const_1-1.c [2019-09-16 17:03:06,381 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/97882a54f/a7650e64bd70472d8506a74f80eb2c63/FLAG17f4d1bff [2019-09-16 17:03:06,761 INFO L306 CDTParser]: Found 1 translation units. [2019-09-16 17:03:06,761 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/const_1-1.c [2019-09-16 17:03:06,767 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/97882a54f/a7650e64bd70472d8506a74f80eb2c63/FLAG17f4d1bff [2019-09-16 17:03:07,128 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/97882a54f/a7650e64bd70472d8506a74f80eb2c63 [2019-09-16 17:03:07,142 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-16 17:03:07,144 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-16 17:03:07,145 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-16 17:03:07,146 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-16 17:03:07,149 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-16 17:03:07,150 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.09 05:03:07" (1/1) ... [2019-09-16 17:03:07,154 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@76f42b70 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 05:03:07, skipping insertion in model container [2019-09-16 17:03:07,154 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.09 05:03:07" (1/1) ... [2019-09-16 17:03:07,162 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-16 17:03:07,182 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-16 17:03:07,401 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-16 17:03:07,406 INFO L188 MainTranslator]: Completed pre-run [2019-09-16 17:03:07,425 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-16 17:03:07,444 INFO L192 MainTranslator]: Completed translation [2019-09-16 17:03:07,445 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 05:03:07 WrapperNode [2019-09-16 17:03:07,445 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-16 17:03:07,446 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-16 17:03:07,446 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-16 17:03:07,446 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-16 17:03:07,547 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 05:03:07" (1/1) ... [2019-09-16 17:03:07,548 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 05:03:07" (1/1) ... [2019-09-16 17:03:07,555 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 05:03:07" (1/1) ... [2019-09-16 17:03:07,555 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 05:03:07" (1/1) ... [2019-09-16 17:03:07,559 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 05:03:07" (1/1) ... [2019-09-16 17:03:07,563 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 05:03:07" (1/1) ... [2019-09-16 17:03:07,564 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 05:03:07" (1/1) ... [2019-09-16 17:03:07,566 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-16 17:03:07,566 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-16 17:03:07,566 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-16 17:03:07,566 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-16 17:03:07,567 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 05:03:07" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-16 17:03:07,628 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-16 17:03:07,628 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-16 17:03:07,628 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-09-16 17:03:07,628 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-16 17:03:07,628 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-16 17:03:07,628 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-09-16 17:03:07,629 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-16 17:03:07,629 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-16 17:03:07,629 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-16 17:03:07,784 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-16 17:03:07,784 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-09-16 17:03:07,785 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.09 05:03:07 BoogieIcfgContainer [2019-09-16 17:03:07,785 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-16 17:03:07,787 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-16 17:03:07,787 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-16 17:03:07,790 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-16 17:03:07,790 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.09 05:03:07" (1/3) ... [2019-09-16 17:03:07,791 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4bbca7c3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.09 05:03:07, skipping insertion in model container [2019-09-16 17:03:07,791 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 05:03:07" (2/3) ... [2019-09-16 17:03:07,792 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4bbca7c3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.09 05:03:07, skipping insertion in model container [2019-09-16 17:03:07,792 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.09 05:03:07" (3/3) ... [2019-09-16 17:03:07,793 INFO L109 eAbstractionObserver]: Analyzing ICFG const_1-1.c [2019-09-16 17:03:07,803 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-16 17:03:07,810 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-16 17:03:07,826 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-16 17:03:07,850 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-16 17:03:07,851 INFO L378 AbstractCegarLoop]: Hoare is false [2019-09-16 17:03:07,851 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-16 17:03:07,851 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-16 17:03:07,851 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-16 17:03:07,851 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-16 17:03:07,852 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-16 17:03:07,852 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-16 17:03:07,865 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states. [2019-09-16 17:03:07,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-09-16 17:03:07,874 INFO L399 BasicCegarLoop]: Found error trace [2019-09-16 17:03:07,875 INFO L407 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-16 17:03:07,877 INFO L418 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-16 17:03:07,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-16 17:03:07,883 INFO L82 PathProgramCache]: Analyzing trace with hash 1846144830, now seen corresponding path program 1 times [2019-09-16 17:03:07,886 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-16 17:03:07,943 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 17:03:07,944 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-16 17:03:07,944 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 17:03:07,944 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-16 17:03:07,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-16 17:03:08,129 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-16 17:03:08,133 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-16 17:03:08,133 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-16 17:03:08,134 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-16 17:03:08,140 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-16 17:03:08,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-16 17:03:08,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-16 17:03:08,166 INFO L87 Difference]: Start difference. First operand 17 states. Second operand 3 states. [2019-09-16 17:03:08,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-16 17:03:08,196 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2019-09-16 17:03:08,197 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-16 17:03:08,199 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2019-09-16 17:03:08,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-16 17:03:08,208 INFO L225 Difference]: With dead ends: 18 [2019-09-16 17:03:08,208 INFO L226 Difference]: Without dead ends: 12 [2019-09-16 17:03:08,210 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-16 17:03:08,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2019-09-16 17:03:08,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2019-09-16 17:03:08,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2019-09-16 17:03:08,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2019-09-16 17:03:08,246 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2019-09-16 17:03:08,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-16 17:03:08,247 INFO L475 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2019-09-16 17:03:08,247 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-16 17:03:08,247 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2019-09-16 17:03:08,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-09-16 17:03:08,248 INFO L399 BasicCegarLoop]: Found error trace [2019-09-16 17:03:08,248 INFO L407 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-16 17:03:08,248 INFO L418 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-16 17:03:08,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-16 17:03:08,249 INFO L82 PathProgramCache]: Analyzing trace with hash 1432376145, now seen corresponding path program 1 times [2019-09-16 17:03:08,249 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-16 17:03:08,250 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 17:03:08,251 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-16 17:03:08,251 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 17:03:08,251 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-16 17:03:08,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-16 17:03:08,345 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-16 17:03:08,346 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-16 17:03:08,346 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-16 17:03:08,347 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 12 with the following transitions: [2019-09-16 17:03:08,349 INFO L207 CegarAbsIntRunner]: [0], [4], [11], [13], [19], [22], [24], [30], [31], [32], [34] [2019-09-16 17:03:08,380 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-16 17:03:08,381 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-16 17:03:08,435 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-09-16 17:03:08,496 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-09-16 17:03:08,499 INFO L272 AbstractInterpreter]: Visited 11 different actions 41 times. Merged at 2 different actions 10 times. Widened at 1 different actions 3 times. Performed 74 root evaluator evaluations with a maximum evaluation depth of 5. Performed 74 inverse root evaluator evaluations with a maximum inverse evaluation depth of 5. Found 1 fixpoints after 1 different actions. Largest state had 3 variables. [2019-09-16 17:03:08,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-16 17:03:08,504 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-09-16 17:03:08,505 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-16 17:03:08,505 INFO L193 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 [2019-09-16 17:03:08,523 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-16 17:03:08,523 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-09-16 17:03:08,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-16 17:03:08,538 INFO L256 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 5 conjunts are in the unsatisfiable core [2019-09-16 17:03:08,544 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-16 17:03:08,594 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-16 17:03:08,594 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-09-16 17:03:08,638 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-16 17:03:08,645 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-09-16 17:03:08,645 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2019-09-16 17:03:08,645 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-09-16 17:03:08,646 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-16 17:03:08,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-16 17:03:08,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2019-09-16 17:03:08,647 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 5 states. [2019-09-16 17:03:08,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-16 17:03:08,669 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2019-09-16 17:03:08,671 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-16 17:03:08,671 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2019-09-16 17:03:08,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-16 17:03:08,672 INFO L225 Difference]: With dead ends: 13 [2019-09-16 17:03:08,672 INFO L226 Difference]: Without dead ends: 13 [2019-09-16 17:03:08,673 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2019-09-16 17:03:08,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2019-09-16 17:03:08,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2019-09-16 17:03:08,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2019-09-16 17:03:08,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2019-09-16 17:03:08,679 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2019-09-16 17:03:08,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-16 17:03:08,680 INFO L475 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2019-09-16 17:03:08,680 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-16 17:03:08,680 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2019-09-16 17:03:08,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-09-16 17:03:08,681 INFO L399 BasicCegarLoop]: Found error trace [2019-09-16 17:03:08,681 INFO L407 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-16 17:03:08,681 INFO L418 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-16 17:03:08,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-16 17:03:08,682 INFO L82 PathProgramCache]: Analyzing trace with hash 1490448798, now seen corresponding path program 2 times [2019-09-16 17:03:08,682 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-16 17:03:08,686 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 17:03:08,687 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-16 17:03:08,687 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 17:03:08,688 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-16 17:03:08,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-16 17:03:08,805 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-16 17:03:08,805 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-16 17:03:08,805 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-16 17:03:08,806 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-09-16 17:03:08,806 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-09-16 17:03:08,806 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-16 17:03:08,806 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-16 17:03:08,826 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-16 17:03:08,826 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-16 17:03:08,838 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-09-16 17:03:08,838 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-16 17:03:08,839 INFO L256 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 7 conjunts are in the unsatisfiable core [2019-09-16 17:03:08,841 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-16 17:03:08,868 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-16 17:03:08,869 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-09-16 17:03:09,394 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-16 17:03:09,397 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-09-16 17:03:09,397 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2019-09-16 17:03:09,397 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-09-16 17:03:09,398 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-16 17:03:09,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-16 17:03:09,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2019-09-16 17:03:09,399 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 6 states. [2019-09-16 17:03:09,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-16 17:03:09,433 INFO L93 Difference]: Finished difference Result 14 states and 14 transitions. [2019-09-16 17:03:09,438 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-09-16 17:03:09,439 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 12 [2019-09-16 17:03:09,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-16 17:03:09,439 INFO L225 Difference]: With dead ends: 14 [2019-09-16 17:03:09,440 INFO L226 Difference]: Without dead ends: 14 [2019-09-16 17:03:09,440 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2019-09-16 17:03:09,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2019-09-16 17:03:09,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2019-09-16 17:03:09,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2019-09-16 17:03:09,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2019-09-16 17:03:09,444 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2019-09-16 17:03:09,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-16 17:03:09,444 INFO L475 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2019-09-16 17:03:09,444 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-16 17:03:09,445 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2019-09-16 17:03:09,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-09-16 17:03:09,445 INFO L399 BasicCegarLoop]: Found error trace [2019-09-16 17:03:09,446 INFO L407 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-16 17:03:09,446 INFO L418 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-16 17:03:09,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-16 17:03:09,446 INFO L82 PathProgramCache]: Analyzing trace with hash -1004266255, now seen corresponding path program 3 times [2019-09-16 17:03:09,447 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-16 17:03:09,448 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 17:03:09,448 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-16 17:03:09,449 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 17:03:09,449 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-16 17:03:09,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-16 17:03:09,545 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-16 17:03:09,546 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-16 17:03:09,546 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-16 17:03:09,546 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-09-16 17:03:09,546 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-09-16 17:03:09,547 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-16 17:03:09,547 INFO L193 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) [2019-09-16 17:03:09,568 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-16 17:03:09,569 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-16 17:03:09,581 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-16 17:03:09,582 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-16 17:03:09,583 INFO L256 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 9 conjunts are in the unsatisfiable core [2019-09-16 17:03:09,584 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-16 17:03:09,612 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-16 17:03:09,612 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-09-16 17:03:10,104 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-16 17:03:10,108 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-09-16 17:03:10,108 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2019-09-16 17:03:10,108 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-09-16 17:03:10,108 INFO L454 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-09-16 17:03:10,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-09-16 17:03:10,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2019-09-16 17:03:10,109 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 7 states. [2019-09-16 17:03:10,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-16 17:03:10,153 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2019-09-16 17:03:10,154 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-09-16 17:03:10,154 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 13 [2019-09-16 17:03:10,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-16 17:03:10,155 INFO L225 Difference]: With dead ends: 15 [2019-09-16 17:03:10,155 INFO L226 Difference]: Without dead ends: 15 [2019-09-16 17:03:10,155 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2019-09-16 17:03:10,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2019-09-16 17:03:10,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2019-09-16 17:03:10,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2019-09-16 17:03:10,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2019-09-16 17:03:10,159 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2019-09-16 17:03:10,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-16 17:03:10,159 INFO L475 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2019-09-16 17:03:10,159 INFO L476 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-09-16 17:03:10,159 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2019-09-16 17:03:10,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-09-16 17:03:10,160 INFO L399 BasicCegarLoop]: Found error trace [2019-09-16 17:03:10,160 INFO L407 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-16 17:03:10,161 INFO L418 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-16 17:03:10,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-16 17:03:10,161 INFO L82 PathProgramCache]: Analyzing trace with hash -1031021570, now seen corresponding path program 4 times [2019-09-16 17:03:10,161 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-16 17:03:10,163 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 17:03:10,163 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-16 17:03:10,163 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 17:03:10,163 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-16 17:03:10,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-16 17:03:10,309 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-16 17:03:10,310 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-16 17:03:10,310 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-16 17:03:10,311 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-09-16 17:03:10,311 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-09-16 17:03:10,311 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-16 17:03:10,311 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-16 17:03:10,325 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-16 17:03:10,325 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-09-16 17:03:10,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-16 17:03:10,344 INFO L256 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 11 conjunts are in the unsatisfiable core [2019-09-16 17:03:10,345 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-16 17:03:10,382 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-16 17:03:10,382 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-09-16 17:03:12,249 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-16 17:03:12,257 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-09-16 17:03:12,257 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2019-09-16 17:03:12,258 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-09-16 17:03:12,258 INFO L454 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-09-16 17:03:12,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-09-16 17:03:12,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=98, Unknown=0, NotChecked=0, Total=156 [2019-09-16 17:03:12,259 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 8 states. [2019-09-16 17:03:12,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-16 17:03:12,327 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2019-09-16 17:03:12,328 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-16 17:03:12,329 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 14 [2019-09-16 17:03:12,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-16 17:03:12,330 INFO L225 Difference]: With dead ends: 16 [2019-09-16 17:03:12,330 INFO L226 Difference]: Without dead ends: 16 [2019-09-16 17:03:12,331 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=58, Invalid=98, Unknown=0, NotChecked=0, Total=156 [2019-09-16 17:03:12,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2019-09-16 17:03:12,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2019-09-16 17:03:12,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2019-09-16 17:03:12,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2019-09-16 17:03:12,334 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 14 [2019-09-16 17:03:12,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-16 17:03:12,334 INFO L475 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2019-09-16 17:03:12,335 INFO L476 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-09-16 17:03:12,335 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2019-09-16 17:03:12,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-09-16 17:03:12,335 INFO L399 BasicCegarLoop]: Found error trace [2019-09-16 17:03:12,335 INFO L407 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-16 17:03:12,336 INFO L418 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-16 17:03:12,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-16 17:03:12,336 INFO L82 PathProgramCache]: Analyzing trace with hash -1860436335, now seen corresponding path program 5 times [2019-09-16 17:03:12,336 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-16 17:03:12,338 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 17:03:12,338 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-16 17:03:12,338 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 17:03:12,338 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-16 17:03:12,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-16 17:03:12,431 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-16 17:03:12,432 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-16 17:03:12,432 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-16 17:03:12,432 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-09-16 17:03:12,432 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-09-16 17:03:12,433 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-16 17:03:12,433 INFO L193 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) [2019-09-16 17:03:12,456 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-16 17:03:12,456 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-16 17:03:12,465 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-09-16 17:03:12,466 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-16 17:03:12,467 INFO L256 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 10 conjunts are in the unsatisfiable core [2019-09-16 17:03:12,468 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-16 17:03:12,534 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-09-16 17:03:12,535 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-09-16 17:03:12,581 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-09-16 17:03:12,585 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-09-16 17:03:12,585 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [8] total 14 [2019-09-16 17:03:12,585 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-16 17:03:12,586 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-16 17:03:12,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-16 17:03:12,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2019-09-16 17:03:12,587 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 5 states. [2019-09-16 17:03:12,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-16 17:03:12,605 INFO L93 Difference]: Finished difference Result 14 states and 14 transitions. [2019-09-16 17:03:12,605 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-09-16 17:03:12,605 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2019-09-16 17:03:12,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-16 17:03:12,606 INFO L225 Difference]: With dead ends: 14 [2019-09-16 17:03:12,606 INFO L226 Difference]: Without dead ends: 0 [2019-09-16 17:03:12,607 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2019-09-16 17:03:12,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-09-16 17:03:12,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-09-16 17:03:12,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-09-16 17:03:12,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-09-16 17:03:12,608 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 15 [2019-09-16 17:03:12,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-16 17:03:12,608 INFO L475 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-09-16 17:03:12,608 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-16 17:03:12,608 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-09-16 17:03:12,608 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-09-16 17:03:12,613 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.09 05:03:12 BoogieIcfgContainer [2019-09-16 17:03:12,614 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-09-16 17:03:12,616 INFO L168 Benchmark]: Toolchain (without parser) took 5471.58 ms. Allocated memory was 138.4 MB in the beginning and 220.7 MB in the end (delta: 82.3 MB). Free memory was 86.4 MB in the beginning and 116.5 MB in the end (delta: -30.1 MB). Peak memory consumption was 52.3 MB. Max. memory is 7.1 GB. [2019-09-16 17:03:12,617 INFO L168 Benchmark]: CDTParser took 1.12 ms. Allocated memory is still 138.4 MB. Free memory was 104.3 MB in the beginning and 104.1 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. [2019-09-16 17:03:12,618 INFO L168 Benchmark]: CACSL2BoogieTranslator took 300.08 ms. Allocated memory is still 138.4 MB. Free memory was 86.0 MB in the beginning and 76.9 MB in the end (delta: 9.1 MB). Peak memory consumption was 9.1 MB. Max. memory is 7.1 GB. [2019-09-16 17:03:12,619 INFO L168 Benchmark]: Boogie Preprocessor took 120.14 ms. Allocated memory was 138.4 MB in the beginning and 198.7 MB in the end (delta: 60.3 MB). Free memory was 76.9 MB in the beginning and 176.7 MB in the end (delta: -99.8 MB). Peak memory consumption was 11.3 MB. Max. memory is 7.1 GB. [2019-09-16 17:03:12,620 INFO L168 Benchmark]: RCFGBuilder took 219.41 ms. Allocated memory is still 198.7 MB. Free memory was 176.7 MB in the beginning and 165.5 MB in the end (delta: 11.2 MB). Peak memory consumption was 11.2 MB. Max. memory is 7.1 GB. [2019-09-16 17:03:12,621 INFO L168 Benchmark]: TraceAbstraction took 4827.17 ms. Allocated memory was 198.7 MB in the beginning and 220.7 MB in the end (delta: 22.0 MB). Free memory was 164.9 MB in the beginning and 116.5 MB in the end (delta: 48.4 MB). Peak memory consumption was 70.4 MB. Max. memory is 7.1 GB. [2019-09-16 17:03:12,626 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.12 ms. Allocated memory is still 138.4 MB. Free memory was 104.3 MB in the beginning and 104.1 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 300.08 ms. Allocated memory is still 138.4 MB. Free memory was 86.0 MB in the beginning and 76.9 MB in the end (delta: 9.1 MB). Peak memory consumption was 9.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 120.14 ms. Allocated memory was 138.4 MB in the beginning and 198.7 MB in the end (delta: 60.3 MB). Free memory was 76.9 MB in the beginning and 176.7 MB in the end (delta: -99.8 MB). Peak memory consumption was 11.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 219.41 ms. Allocated memory is still 198.7 MB. Free memory was 176.7 MB in the beginning and 165.5 MB in the end (delta: 11.2 MB). Peak memory consumption was 11.2 MB. Max. memory is 7.1 GB. * TraceAbstraction took 4827.17 ms. Allocated memory was 198.7 MB in the beginning and 220.7 MB in the end (delta: 22.0 MB). Free memory was 164.9 MB in the beginning and 116.5 MB in the end (delta: 48.4 MB). Peak memory consumption was 70.4 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 5]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 17 locations, 1 error locations. SAFE Result, 4.7s OverallTime, 6 OverallIterations, 5 TraceHistogramMax, 0.2s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 65 SDtfs, 1 SDslu, 156 SDs, 0 SdLazy, 90 SolverSat, 10 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 159 GetRequests, 109 SyntacticMatches, 4 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 3.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=17occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.1s AbstIntTime, 1 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 6 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 3.7s InterpolantComputationTime, 140 NumberOfCodeBlocks, 137 NumberOfCodeBlocksAsserted, 14 NumberOfCheckSat, 189 ConstructedInterpolants, 0 QuantifiedInterpolants, 6273 SizeOfPredicates, 7 NumberOfNonLiveVariables, 180 ConjunctsInSsa, 42 ConjunctsInUnsatCore, 16 InterpolantComputations, 3 PerfectInterpolantSequences, 30/105 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...