/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.3 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-invgen/large_const.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-19 05:19:37,268 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-19 05:19:37,271 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-19 05:19:37,313 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-19 05:19:37,314 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-19 05:19:37,315 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-19 05:19:37,316 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-19 05:19:37,318 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-19 05:19:37,320 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-19 05:19:37,320 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-19 05:19:37,321 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-19 05:19:37,323 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-19 05:19:37,323 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-19 05:19:37,324 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-19 05:19:37,325 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-19 05:19:37,326 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-19 05:19:37,327 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-19 05:19:37,328 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-19 05:19:37,330 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-19 05:19:37,332 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-19 05:19:37,334 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-19 05:19:37,335 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-19 05:19:37,336 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-19 05:19:37,337 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-19 05:19:37,340 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-19 05:19:37,348 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-19 05:19:37,349 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-19 05:19:37,349 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-19 05:19:37,350 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-19 05:19:37,373 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-19 05:19:37,373 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-19 05:19:37,374 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-19 05:19:37,375 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-19 05:19:37,375 INFO L138 SettingsManager]: * Use SBE=true [2020-08-19 05:19:37,375 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-19 05:19:37,375 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-19 05:19:37,376 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-19 05:19:37,376 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-19 05:19:37,376 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-19 05:19:37,376 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-19 05:19:37,376 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-19 05:19:37,377 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-19 05:19:37,377 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-19 05:19:37,377 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-19 05:19:37,377 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-19 05:19:37,377 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-19 05:19:37,377 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-19 05:19:37,378 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-19 05:19:37,378 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-19 05:19:37,378 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-19 05:19:37,378 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-19 05:19:37,379 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-19 05:19:37,379 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-19 05:19:37,379 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-19 05:19:37,379 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-19 05:19:37,379 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-19 05:19:37,379 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-19 05:19:37,380 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-19 05:19:37,380 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3; [2020-08-19 05:19:37,680 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-19 05:19:37,703 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-19 05:19:37,709 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-19 05:19:37,711 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-19 05:19:37,712 INFO L275 PluginConnector]: CDTParser initialized [2020-08-19 05:19:37,713 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invgen/large_const.i [2020-08-19 05:19:37,789 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f840f39ba/f9eca2342c5245a6a17618749cdcf215/FLAG140f6d636 [2020-08-19 05:19:38,292 INFO L306 CDTParser]: Found 1 translation units. [2020-08-19 05:19:38,292 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-invgen/large_const.i [2020-08-19 05:19:38,298 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f840f39ba/f9eca2342c5245a6a17618749cdcf215/FLAG140f6d636 [2020-08-19 05:19:38,659 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f840f39ba/f9eca2342c5245a6a17618749cdcf215 [2020-08-19 05:19:38,669 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-19 05:19:38,671 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-19 05:19:38,672 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-19 05:19:38,672 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-19 05:19:38,676 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-19 05:19:38,677 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.08 05:19:38" (1/1) ... [2020-08-19 05:19:38,680 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6c45f0f1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 05:19:38, skipping insertion in model container [2020-08-19 05:19:38,680 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.08 05:19:38" (1/1) ... [2020-08-19 05:19:38,688 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-19 05:19:38,709 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-19 05:19:38,887 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-19 05:19:38,891 INFO L203 MainTranslator]: Completed pre-run [2020-08-19 05:19:38,911 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-19 05:19:38,924 INFO L208 MainTranslator]: Completed translation [2020-08-19 05:19:38,924 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 05:19:38 WrapperNode [2020-08-19 05:19:38,924 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-19 05:19:38,925 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-19 05:19:38,925 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-19 05:19:38,925 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-19 05:19:38,937 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 05:19:38" (1/1) ... [2020-08-19 05:19:38,937 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 05:19:38" (1/1) ... [2020-08-19 05:19:39,023 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 05:19:38" (1/1) ... [2020-08-19 05:19:39,023 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 05:19:38" (1/1) ... [2020-08-19 05:19:39,031 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 05:19:38" (1/1) ... [2020-08-19 05:19:39,041 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 05:19:38" (1/1) ... [2020-08-19 05:19:39,047 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 05:19:38" (1/1) ... [2020-08-19 05:19:39,049 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-19 05:19:39,050 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-19 05:19:39,050 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-19 05:19:39,050 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-19 05:19:39,051 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 05:19:38" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/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 [2020-08-19 05:19:39,109 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-19 05:19:39,109 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-19 05:19:39,109 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-08-19 05:19:39,109 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-19 05:19:39,109 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-19 05:19:39,109 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-19 05:19:39,109 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-19 05:19:39,110 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-08-19 05:19:39,110 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-19 05:19:39,110 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-19 05:19:39,110 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-19 05:19:39,110 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-19 05:19:39,110 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-19 05:19:39,354 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-19 05:19:39,355 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-08-19 05:19:39,360 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.08 05:19:39 BoogieIcfgContainer [2020-08-19 05:19:39,360 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-19 05:19:39,361 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-19 05:19:39,361 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-19 05:19:39,365 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-19 05:19:39,366 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.08 05:19:38" (1/3) ... [2020-08-19 05:19:39,367 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b10a8b9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.08 05:19:39, skipping insertion in model container [2020-08-19 05:19:39,367 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 05:19:38" (2/3) ... [2020-08-19 05:19:39,367 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b10a8b9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.08 05:19:39, skipping insertion in model container [2020-08-19 05:19:39,367 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.08 05:19:39" (3/3) ... [2020-08-19 05:19:39,370 INFO L109 eAbstractionObserver]: Analyzing ICFG large_const.i [2020-08-19 05:19:39,383 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-19 05:19:39,391 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-19 05:19:39,414 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-19 05:19:39,442 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-19 05:19:39,443 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-19 05:19:39,443 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-19 05:19:39,443 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-19 05:19:39,443 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-19 05:19:39,443 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-19 05:19:39,444 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-19 05:19:39,444 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-19 05:19:39,482 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states. [2020-08-19 05:19:39,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-08-19 05:19:39,490 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 05:19:39,491 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 05:19:39,491 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 05:19:39,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 05:19:39,496 INFO L82 PathProgramCache]: Analyzing trace with hash -1992019723, now seen corresponding path program 1 times [2020-08-19 05:19:39,503 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 05:19:39,504 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [9620402] [2020-08-19 05:19:39,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 05:19:39,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:19:39,677 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 05:19:39,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:19:39,684 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 05:19:39,685 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [9620402] [2020-08-19 05:19:39,687 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 05:19:39,688 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-19 05:19:39,688 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506714389] [2020-08-19 05:19:39,697 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-19 05:19:39,697 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 05:19:39,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-19 05:19:39,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-19 05:19:39,715 INFO L87 Difference]: Start difference. First operand 25 states. Second operand 5 states. [2020-08-19 05:19:39,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 05:19:39,820 INFO L93 Difference]: Finished difference Result 48 states and 63 transitions. [2020-08-19 05:19:39,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-19 05:19:39,823 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-08-19 05:19:39,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 05:19:39,832 INFO L225 Difference]: With dead ends: 48 [2020-08-19 05:19:39,833 INFO L226 Difference]: Without dead ends: 21 [2020-08-19 05:19:39,837 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-08-19 05:19:39,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-08-19 05:19:39,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-08-19 05:19:39,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-08-19 05:19:39,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2020-08-19 05:19:39,882 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 13 [2020-08-19 05:19:39,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 05:19:39,882 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2020-08-19 05:19:39,882 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-19 05:19:39,883 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2020-08-19 05:19:39,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-08-19 05:19:39,884 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 05:19:39,884 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 05:19:39,884 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-19 05:19:39,885 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 05:19:39,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 05:19:39,886 INFO L82 PathProgramCache]: Analyzing trace with hash 2018685173, now seen corresponding path program 1 times [2020-08-19 05:19:39,886 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 05:19:39,886 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1859021286] [2020-08-19 05:19:39,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 05:19:39,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:19:40,014 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 05:19:40,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:19:40,021 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 05:19:40,022 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1859021286] [2020-08-19 05:19:40,022 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 05:19:40,022 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-19 05:19:40,023 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910379443] [2020-08-19 05:19:40,024 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-19 05:19:40,025 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 05:19:40,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-19 05:19:40,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-08-19 05:19:40,026 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand 7 states. [2020-08-19 05:19:40,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 05:19:40,167 INFO L93 Difference]: Finished difference Result 41 states and 50 transitions. [2020-08-19 05:19:40,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-19 05:19:40,168 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 16 [2020-08-19 05:19:40,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 05:19:40,172 INFO L225 Difference]: With dead ends: 41 [2020-08-19 05:19:40,172 INFO L226 Difference]: Without dead ends: 39 [2020-08-19 05:19:40,173 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-08-19 05:19:40,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-08-19 05:19:40,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 31. [2020-08-19 05:19:40,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-08-19 05:19:40,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2020-08-19 05:19:40,189 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 16 [2020-08-19 05:19:40,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 05:19:40,189 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2020-08-19 05:19:40,189 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-19 05:19:40,189 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2020-08-19 05:19:40,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-08-19 05:19:40,190 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 05:19:40,191 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 05:19:40,191 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-19 05:19:40,191 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 05:19:40,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 05:19:40,192 INFO L82 PathProgramCache]: Analyzing trace with hash 23130030, now seen corresponding path program 1 times [2020-08-19 05:19:40,192 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 05:19:40,192 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1147460432] [2020-08-19 05:19:40,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 05:19:40,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:19:40,324 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 05:19:40,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:19:40,332 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 05:19:40,333 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1147460432] [2020-08-19 05:19:40,333 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 05:19:40,334 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-19 05:19:40,334 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845163506] [2020-08-19 05:19:40,335 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-19 05:19:40,335 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 05:19:40,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-19 05:19:40,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-08-19 05:19:40,336 INFO L87 Difference]: Start difference. First operand 31 states and 36 transitions. Second operand 7 states. [2020-08-19 05:19:40,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 05:19:40,488 INFO L93 Difference]: Finished difference Result 51 states and 62 transitions. [2020-08-19 05:19:40,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-19 05:19:40,489 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 17 [2020-08-19 05:19:40,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 05:19:40,492 INFO L225 Difference]: With dead ends: 51 [2020-08-19 05:19:40,493 INFO L226 Difference]: Without dead ends: 49 [2020-08-19 05:19:40,493 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-08-19 05:19:40,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-08-19 05:19:40,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 37. [2020-08-19 05:19:40,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-08-19 05:19:40,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 46 transitions. [2020-08-19 05:19:40,505 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 46 transitions. Word has length 17 [2020-08-19 05:19:40,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 05:19:40,506 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 46 transitions. [2020-08-19 05:19:40,506 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-19 05:19:40,506 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 46 transitions. [2020-08-19 05:19:40,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-08-19 05:19:40,507 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 05:19:40,507 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 05:19:40,507 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-19 05:19:40,522 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 05:19:40,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 05:19:40,522 INFO L82 PathProgramCache]: Analyzing trace with hash -786216596, now seen corresponding path program 1 times [2020-08-19 05:19:40,523 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 05:19:40,523 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [653235098] [2020-08-19 05:19:40,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 05:19:40,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:19:40,607 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 05:19:40,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:19:40,611 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 05:19:40,611 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [653235098] [2020-08-19 05:19:40,612 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 05:19:40,612 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-19 05:19:40,612 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091560522] [2020-08-19 05:19:40,613 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-19 05:19:40,613 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 05:19:40,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-19 05:19:40,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-08-19 05:19:40,614 INFO L87 Difference]: Start difference. First operand 37 states and 46 transitions. Second operand 7 states. [2020-08-19 05:19:40,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 05:19:40,723 INFO L93 Difference]: Finished difference Result 55 states and 69 transitions. [2020-08-19 05:19:40,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-19 05:19:40,723 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 17 [2020-08-19 05:19:40,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 05:19:40,725 INFO L225 Difference]: With dead ends: 55 [2020-08-19 05:19:40,725 INFO L226 Difference]: Without dead ends: 53 [2020-08-19 05:19:40,726 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-08-19 05:19:40,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-08-19 05:19:40,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 42. [2020-08-19 05:19:40,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-08-19 05:19:40,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 55 transitions. [2020-08-19 05:19:40,736 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 55 transitions. Word has length 17 [2020-08-19 05:19:40,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 05:19:40,736 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 55 transitions. [2020-08-19 05:19:40,736 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-19 05:19:40,736 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 55 transitions. [2020-08-19 05:19:40,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-19 05:19:40,737 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 05:19:40,738 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 05:19:40,738 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-19 05:19:40,738 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 05:19:40,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 05:19:40,738 INFO L82 PathProgramCache]: Analyzing trace with hash -986746962, now seen corresponding path program 1 times [2020-08-19 05:19:40,739 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 05:19:40,739 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1763041192] [2020-08-19 05:19:40,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 05:19:40,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:19:40,783 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 05:19:40,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:19:40,786 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 05:19:40,786 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1763041192] [2020-08-19 05:19:40,787 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 05:19:40,787 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-08-19 05:19:40,787 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96747644] [2020-08-19 05:19:40,788 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-19 05:19:40,788 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 05:19:40,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-19 05:19:40,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-19 05:19:40,789 INFO L87 Difference]: Start difference. First operand 42 states and 55 transitions. Second operand 5 states. [2020-08-19 05:19:40,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 05:19:40,814 INFO L93 Difference]: Finished difference Result 61 states and 77 transitions. [2020-08-19 05:19:40,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-19 05:19:40,815 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2020-08-19 05:19:40,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 05:19:40,816 INFO L225 Difference]: With dead ends: 61 [2020-08-19 05:19:40,816 INFO L226 Difference]: Without dead ends: 29 [2020-08-19 05:19:40,817 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-08-19 05:19:40,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-08-19 05:19:40,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2020-08-19 05:19:40,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-08-19 05:19:40,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2020-08-19 05:19:40,823 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 20 [2020-08-19 05:19:40,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 05:19:40,823 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2020-08-19 05:19:40,823 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-19 05:19:40,823 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2020-08-19 05:19:40,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-19 05:19:40,824 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 05:19:40,824 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 05:19:40,825 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-19 05:19:40,825 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 05:19:40,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 05:19:40,825 INFO L82 PathProgramCache]: Analyzing trace with hash 1470890089, now seen corresponding path program 1 times [2020-08-19 05:19:40,826 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 05:19:40,826 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1382220807] [2020-08-19 05:19:40,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 05:19:40,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:19:40,886 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 05:19:40,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:19:40,888 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 05:19:40,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:19:40,893 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 05:19:40,894 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1382220807] [2020-08-19 05:19:40,894 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 05:19:40,894 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-19 05:19:40,895 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244736841] [2020-08-19 05:19:40,895 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-19 05:19:40,895 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 05:19:40,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-19 05:19:40,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-08-19 05:19:40,896 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand 8 states. [2020-08-19 05:19:41,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 05:19:41,012 INFO L93 Difference]: Finished difference Result 48 states and 51 transitions. [2020-08-19 05:19:41,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-19 05:19:41,012 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 23 [2020-08-19 05:19:41,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 05:19:41,014 INFO L225 Difference]: With dead ends: 48 [2020-08-19 05:19:41,014 INFO L226 Difference]: Without dead ends: 46 [2020-08-19 05:19:41,014 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2020-08-19 05:19:41,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-08-19 05:19:41,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 36. [2020-08-19 05:19:41,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-08-19 05:19:41,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2020-08-19 05:19:41,023 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 23 [2020-08-19 05:19:41,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 05:19:41,023 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2020-08-19 05:19:41,023 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-19 05:19:41,024 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2020-08-19 05:19:41,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-19 05:19:41,024 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 05:19:41,025 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 05:19:41,025 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-19 05:19:41,025 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 05:19:41,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 05:19:41,026 INFO L82 PathProgramCache]: Analyzing trace with hash -1116377200, now seen corresponding path program 1 times [2020-08-19 05:19:41,026 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 05:19:41,026 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [172741398] [2020-08-19 05:19:41,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 05:19:41,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:19:41,071 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 05:19:41,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:19:41,073 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-08-19 05:19:41,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:19:41,082 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 05:19:41,082 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [172741398] [2020-08-19 05:19:41,082 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 05:19:41,083 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-19 05:19:41,083 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723676974] [2020-08-19 05:19:41,083 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-19 05:19:41,084 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 05:19:41,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-19 05:19:41,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-19 05:19:41,084 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand 5 states. [2020-08-19 05:19:41,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 05:19:41,138 INFO L93 Difference]: Finished difference Result 44 states and 46 transitions. [2020-08-19 05:19:41,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-19 05:19:41,139 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 24 [2020-08-19 05:19:41,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 05:19:41,139 INFO L225 Difference]: With dead ends: 44 [2020-08-19 05:19:41,139 INFO L226 Difference]: Without dead ends: 0 [2020-08-19 05:19:41,140 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-08-19 05:19:41,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-19 05:19:41,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-19 05:19:41,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-19 05:19:41,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-19 05:19:41,141 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 24 [2020-08-19 05:19:41,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 05:19:41,142 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-19 05:19:41,142 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-19 05:19:41,142 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-19 05:19:41,142 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-19 05:19:41,142 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-19 05:19:41,145 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-19 05:19:41,446 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 31 [2020-08-19 05:19:41,531 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-08-19 05:19:41,532 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-19 05:19:41,532 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-19 05:19:41,532 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-19 05:19:41,532 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-19 05:19:41,532 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-19 05:19:41,533 INFO L268 CegarLoopResult]: For program point assume_abort_if_notENTRY(lines 3 5) no Hoare annotation was computed. [2020-08-19 05:19:41,533 INFO L268 CegarLoopResult]: For program point L4(line 4) no Hoare annotation was computed. [2020-08-19 05:19:41,533 INFO L268 CegarLoopResult]: For program point L4-2(lines 3 5) no Hoare annotation was computed. [2020-08-19 05:19:41,533 INFO L268 CegarLoopResult]: For program point assume_abort_if_notEXIT(lines 3 5) no Hoare annotation was computed. [2020-08-19 05:19:41,533 INFO L264 CegarLoopResult]: At program point L35-2(lines 35 39) the Hoare annotation is: (let ((.cse0 (<= main_~n~0 main_~j~0)) (.cse1 (<= 4000 main_~c1~0)) (.cse2 (<= 2000 main_~c2~0)) (.cse3 (<= main_~n~0 1)) (.cse4 (<= 10000 main_~c3~0))) (or (and .cse0 (<= main_~i~0 0) (<= main_~n~0 0)) (and .cse1 .cse0 (<= main_~n~0 main_~i~0) .cse2 .cse3 .cse4) (and .cse1 (<= 1 main_~i~0) (<= 2000 main_~k~0) .cse2 (<= main_~n~0 (+ main_~j~0 1)) .cse3 .cse4))) [2020-08-19 05:19:41,534 INFO L268 CegarLoopResult]: For program point L35-3(lines 35 39) no Hoare annotation was computed. [2020-08-19 05:19:41,534 INFO L268 CegarLoopResult]: For program point L29(lines 29 32) no Hoare annotation was computed. [2020-08-19 05:19:41,534 INFO L268 CegarLoopResult]: For program point L27(lines 27 32) no Hoare annotation was computed. [2020-08-19 05:19:41,534 INFO L264 CegarLoopResult]: At program point L29-2(lines 23 33) the Hoare annotation is: (let ((.cse0 (<= 4000 main_~c1~0)) (.cse1 (<= 2000 main_~c2~0)) (.cse2 (<= 10000 main_~c3~0))) (or (and .cse0 (<= main_~i~0 0) (<= 10000 (+ main_~c3~0 main_~k~0)) (<= 0 main_~i~0) (<= 4000 (+ main_~c1~0 main_~k~0)) (<= 2000 (+ main_~c2~0 main_~k~0)) .cse1 .cse2) (and .cse0 (<= 1 main_~i~0) (<= 2000 main_~k~0) .cse1 (<= main_~n~0 1) .cse2))) [2020-08-19 05:19:41,535 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 13 41) no Hoare annotation was computed. [2020-08-19 05:19:41,535 INFO L268 CegarLoopResult]: For program point L23-2(lines 23 33) no Hoare annotation was computed. [2020-08-19 05:19:41,535 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 13 41) no Hoare annotation was computed. [2020-08-19 05:19:41,535 INFO L264 CegarLoopResult]: At program point L36(line 36) the Hoare annotation is: (and (<= 4000 main_~c1~0) (<= 1 main_~i~0) (<= 2000 main_~k~0) (<= 2000 main_~c2~0) (<= main_~n~0 (+ main_~j~0 1)) (<= main_~n~0 1) (<= 10000 main_~c3~0)) [2020-08-19 05:19:41,535 INFO L268 CegarLoopResult]: For program point L36-1(line 36) no Hoare annotation was computed. [2020-08-19 05:19:41,536 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 13 41) the Hoare annotation is: true [2020-08-19 05:19:41,536 INFO L268 CegarLoopResult]: For program point L26(line 26) no Hoare annotation was computed. [2020-08-19 05:19:41,536 INFO L268 CegarLoopResult]: For program point L20(line 20) no Hoare annotation was computed. [2020-08-19 05:19:41,536 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 6 11) the Hoare annotation is: true [2020-08-19 05:19:41,547 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 6 11) no Hoare annotation was computed. [2020-08-19 05:19:41,547 INFO L268 CegarLoopResult]: For program point L8(line 8) no Hoare annotation was computed. [2020-08-19 05:19:41,547 INFO L268 CegarLoopResult]: For program point L7(lines 7 9) no Hoare annotation was computed. [2020-08-19 05:19:41,547 INFO L268 CegarLoopResult]: For program point L7-2(lines 6 11) no Hoare annotation was computed. [2020-08-19 05:19:41,548 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 8) no Hoare annotation was computed. [2020-08-19 05:19:41,569 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.08 05:19:41 BoogieIcfgContainer [2020-08-19 05:19:41,569 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-19 05:19:41,572 INFO L168 Benchmark]: Toolchain (without parser) took 2900.82 ms. Allocated memory was 140.5 MB in the beginning and 244.8 MB in the end (delta: 104.3 MB). Free memory was 102.9 MB in the beginning and 218.2 MB in the end (delta: -115.4 MB). Peak memory consumption was 113.4 MB. Max. memory is 7.1 GB. [2020-08-19 05:19:41,573 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 140.5 MB. Free memory was 122.0 MB in the beginning and 121.6 MB in the end (delta: 419.7 kB). Peak memory consumption was 419.7 kB. Max. memory is 7.1 GB. [2020-08-19 05:19:41,573 INFO L168 Benchmark]: CACSL2BoogieTranslator took 252.79 ms. Allocated memory is still 140.5 MB. Free memory was 102.9 MB in the beginning and 93.1 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. [2020-08-19 05:19:41,575 INFO L168 Benchmark]: Boogie Preprocessor took 124.49 ms. Allocated memory was 140.5 MB in the beginning and 202.9 MB in the end (delta: 62.4 MB). Free memory was 93.1 MB in the beginning and 181.3 MB in the end (delta: -88.3 MB). Peak memory consumption was 13.0 MB. Max. memory is 7.1 GB. [2020-08-19 05:19:41,576 INFO L168 Benchmark]: RCFGBuilder took 310.23 ms. Allocated memory is still 202.9 MB. Free memory was 181.3 MB in the beginning and 165.7 MB in the end (delta: 15.6 MB). Peak memory consumption was 15.6 MB. Max. memory is 7.1 GB. [2020-08-19 05:19:41,577 INFO L168 Benchmark]: TraceAbstraction took 2208.12 ms. Allocated memory was 202.9 MB in the beginning and 244.8 MB in the end (delta: 41.9 MB). Free memory was 165.7 MB in the beginning and 218.2 MB in the end (delta: -52.5 MB). Peak memory consumption was 113.9 MB. Max. memory is 7.1 GB. [2020-08-19 05:19:41,581 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 140.5 MB. Free memory was 122.0 MB in the beginning and 121.6 MB in the end (delta: 419.7 kB). Peak memory consumption was 419.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 252.79 ms. Allocated memory is still 140.5 MB. Free memory was 102.9 MB in the beginning and 93.1 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 124.49 ms. Allocated memory was 140.5 MB in the beginning and 202.9 MB in the end (delta: 62.4 MB). Free memory was 93.1 MB in the beginning and 181.3 MB in the end (delta: -88.3 MB). Peak memory consumption was 13.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 310.23 ms. Allocated memory is still 202.9 MB. Free memory was 181.3 MB in the beginning and 165.7 MB in the end (delta: 15.6 MB). Peak memory consumption was 15.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2208.12 ms. Allocated memory was 202.9 MB in the beginning and 244.8 MB in the end (delta: 41.9 MB). Free memory was 165.7 MB in the beginning and 218.2 MB in the end (delta: -52.5 MB). Peak memory consumption was 113.9 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 8]: 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 - InvariantResult [Line: 23]: Loop Invariant Derived loop invariant: (((((((4000 <= c1 && i <= 0) && 10000 <= c3 + k) && 0 <= i) && 4000 <= c1 + k) && 2000 <= c2 + k) && 2000 <= c2) && 10000 <= c3) || (((((4000 <= c1 && 1 <= i) && 2000 <= k) && 2000 <= c2) && n <= 1) && 10000 <= c3) - InvariantResult [Line: 35]: Loop Invariant Derived loop invariant: (((n <= j && i <= 0) && n <= 0) || (((((4000 <= c1 && n <= j) && n <= i) && 2000 <= c2) && n <= 1) && 10000 <= c3)) || ((((((4000 <= c1 && 1 <= i) && 2000 <= k) && 2000 <= c2) && n <= j + 1) && n <= 1) && 10000 <= c3) - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 29 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 1.7s, OverallIterations: 7, TraceHistogramMax: 2, AutomataDifference: 0.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.3s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 164 SDtfs, 149 SDslu, 456 SDs, 0 SdLazy, 260 SolverSat, 59 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 80 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=42occurred in iteration=4, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 7 MinimizatonAttempts, 43 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 14 PreInvPairs, 24 NumberOfFragments, 134 HoareAnnotationTreeSize, 14 FomulaSimplifications, 716 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 8 FomulaSimplificationsInter, 389 FormulaSimplificationTreeSizeReductionInter, 0.3s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.5s InterpolantComputationTime, 130 NumberOfCodeBlocks, 130 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 123 ConstructedInterpolants, 0 QuantifiedInterpolants, 5177 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 7 InterpolantComputations, 2 PerfectInterpolantSequences, 11/18 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...