/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.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.use.separate.solver.for.trace.checks true -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/loop-lit/hhk2008.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-3af5e1f [2020-09-04 23:15:12,558 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-04 23:15:12,561 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-04 23:15:12,589 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-04 23:15:12,590 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-04 23:15:12,591 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-04 23:15:12,592 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-04 23:15:12,594 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-04 23:15:12,596 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-04 23:15:12,597 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-04 23:15:12,599 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-04 23:15:12,600 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-04 23:15:12,600 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-04 23:15:12,601 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-04 23:15:12,608 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-04 23:15:12,610 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-04 23:15:12,611 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-04 23:15:12,612 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-04 23:15:12,616 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-04 23:15:12,620 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-04 23:15:12,624 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-04 23:15:12,628 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-04 23:15:12,630 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-04 23:15:12,631 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-04 23:15:12,638 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-09-04 23:15:12,653 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-04 23:15:12,654 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-04 23:15:12,656 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-04 23:15:12,657 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-09-04 23:15:12,677 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-04 23:15:12,677 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-04 23:15:12,680 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-04 23:15:12,680 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-04 23:15:12,680 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-04 23:15:12,680 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-04 23:15:12,681 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-04 23:15:12,681 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-04 23:15:12,681 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-04 23:15:12,681 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-04 23:15:12,683 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-04 23:15:12,683 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-04 23:15:12,683 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-04 23:15:12,683 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-04 23:15:12,684 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-04 23:15:12,684 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-09-04 23:15:12,684 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-04 23:15:12,684 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-04 23:15:12,685 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-04 23:15:12,685 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-04 23:15:12,685 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-09-04 23:15:12,685 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-04 23:15:12,686 INFO L138 SettingsManager]: * Use separate solver for trace checks=false 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: Use separate solver for trace checks -> true [2020-09-04 23:15:13,169 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-04 23:15:13,187 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-04 23:15:13,192 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-04 23:15:13,194 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-04 23:15:13,195 INFO L275 PluginConnector]: CDTParser initialized [2020-09-04 23:15:13,196 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/hhk2008.i [2020-09-04 23:15:13,289 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3f74d5468/d9d4dbbe2c364889b4fbb1f187d37280/FLAGb6180280e [2020-09-04 23:15:13,838 INFO L306 CDTParser]: Found 1 translation units. [2020-09-04 23:15:13,839 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-lit/hhk2008.i [2020-09-04 23:15:13,848 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3f74d5468/d9d4dbbe2c364889b4fbb1f187d37280/FLAGb6180280e [2020-09-04 23:15:14,172 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3f74d5468/d9d4dbbe2c364889b4fbb1f187d37280 [2020-09-04 23:15:14,184 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-04 23:15:14,186 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-04 23:15:14,187 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-04 23:15:14,187 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-04 23:15:14,192 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-04 23:15:14,193 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 11:15:14" (1/1) ... [2020-09-04 23:15:14,197 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@138a7dd5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:15:14, skipping insertion in model container [2020-09-04 23:15:14,198 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 11:15:14" (1/1) ... [2020-09-04 23:15:14,207 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-04 23:15:14,231 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-04 23:15:14,438 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 23:15:14,444 INFO L203 MainTranslator]: Completed pre-run [2020-09-04 23:15:14,464 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 23:15:14,482 INFO L208 MainTranslator]: Completed translation [2020-09-04 23:15:14,483 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:15:14 WrapperNode [2020-09-04 23:15:14,483 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-04 23:15:14,484 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-04 23:15:14,484 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-04 23:15:14,484 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-04 23:15:14,499 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:15:14" (1/1) ... [2020-09-04 23:15:14,499 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:15:14" (1/1) ... [2020-09-04 23:15:14,504 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:15:14" (1/1) ... [2020-09-04 23:15:14,505 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:15:14" (1/1) ... [2020-09-04 23:15:14,508 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:15:14" (1/1) ... [2020-09-04 23:15:14,514 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:15:14" (1/1) ... [2020-09-04 23:15:14,517 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:15:14" (1/1) ... [2020-09-04 23:15:14,591 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-04 23:15:14,592 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-04 23:15:14,592 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-04 23:15:14,593 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-04 23:15:14,594 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:15:14" (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 [2020-09-04 23:15:14,679 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-04 23:15:14,680 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-04 23:15:14,680 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-04 23:15:14,680 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-04 23:15:14,680 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-04 23:15:14,680 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-04 23:15:14,680 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-04 23:15:14,680 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-04 23:15:14,681 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-04 23:15:14,681 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-04 23:15:14,681 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-04 23:15:14,681 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-04 23:15:14,681 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-04 23:15:14,904 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-04 23:15:14,904 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-04 23:15:14,911 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 11:15:14 BoogieIcfgContainer [2020-09-04 23:15:14,912 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-04 23:15:14,913 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-04 23:15:14,914 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-04 23:15:14,917 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-04 23:15:14,918 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.09 11:15:14" (1/3) ... [2020-09-04 23:15:14,919 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d18695d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 11:15:14, skipping insertion in model container [2020-09-04 23:15:14,919 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:15:14" (2/3) ... [2020-09-04 23:15:14,920 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d18695d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 11:15:14, skipping insertion in model container [2020-09-04 23:15:14,920 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 11:15:14" (3/3) ... [2020-09-04 23:15:14,923 INFO L109 eAbstractionObserver]: Analyzing ICFG hhk2008.i [2020-09-04 23:15:14,940 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-04 23:15:14,950 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-04 23:15:14,977 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-04 23:15:15,010 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-04 23:15:15,010 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-04 23:15:15,011 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-04 23:15:15,011 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-04 23:15:15,011 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-04 23:15:15,011 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-04 23:15:15,011 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-04 23:15:15,011 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-04 23:15:15,031 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2020-09-04 23:15:15,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-04 23:15:15,046 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:15:15,048 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:15:15,048 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:15:15,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:15:15,056 INFO L82 PathProgramCache]: Analyzing trace with hash 1378758603, now seen corresponding path program 1 times [2020-09-04 23:15:15,070 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:15:15,071 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1454003720] [2020-09-04 23:15:15,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:15:15,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:15,449 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:15:15,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:15,460 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:15:15,461 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1454003720] [2020-09-04 23:15:15,463 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 23:15:15,464 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-09-04 23:15:15,465 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493900693] [2020-09-04 23:15:15,472 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-04 23:15:15,472 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:15:15,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-04 23:15:15,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-09-04 23:15:15,493 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 8 states. [2020-09-04 23:15:15,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:15:15,745 INFO L93 Difference]: Finished difference Result 58 states and 67 transitions. [2020-09-04 23:15:15,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-04 23:15:15,747 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 21 [2020-09-04 23:15:15,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:15:15,759 INFO L225 Difference]: With dead ends: 58 [2020-09-04 23:15:15,759 INFO L226 Difference]: Without dead ends: 27 [2020-09-04 23:15:15,764 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2020-09-04 23:15:15,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-09-04 23:15:15,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 25. [2020-09-04 23:15:15,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-09-04 23:15:15,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2020-09-04 23:15:15,817 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 21 [2020-09-04 23:15:15,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:15:15,817 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2020-09-04 23:15:15,818 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-04 23:15:15,818 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2020-09-04 23:15:15,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-04 23:15:15,819 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:15:15,819 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:15:15,820 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-04 23:15:15,820 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:15:15,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:15:15,820 INFO L82 PathProgramCache]: Analyzing trace with hash 1865209823, now seen corresponding path program 1 times [2020-09-04 23:15:15,821 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:15:15,821 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1066543028] [2020-09-04 23:15:15,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:15:15,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:16,047 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:15:16,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:16,053 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:15:16,054 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1066543028] [2020-09-04 23:15:16,054 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:15:16,054 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-04 23:15:16,055 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304235423] [2020-09-04 23:15:16,057 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-04 23:15:16,057 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:15:16,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-04 23:15:16,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2020-09-04 23:15:16,058 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 10 states. [2020-09-04 23:15:16,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:15:16,266 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2020-09-04 23:15:16,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-04 23:15:16,267 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 24 [2020-09-04 23:15:16,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:15:16,268 INFO L225 Difference]: With dead ends: 34 [2020-09-04 23:15:16,269 INFO L226 Difference]: Without dead ends: 29 [2020-09-04 23:15:16,270 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2020-09-04 23:15:16,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-09-04 23:15:16,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2020-09-04 23:15:16,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-09-04 23:15:16,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2020-09-04 23:15:16,279 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 24 [2020-09-04 23:15:16,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:15:16,280 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2020-09-04 23:15:16,280 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-04 23:15:16,280 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2020-09-04 23:15:16,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-04 23:15:16,281 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:15:16,281 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, 1, 1, 1] [2020-09-04 23:15:16,282 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-04 23:15:16,282 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:15:16,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:15:16,282 INFO L82 PathProgramCache]: Analyzing trace with hash -1781119157, now seen corresponding path program 2 times [2020-09-04 23:15:16,283 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:15:16,283 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2008192480] [2020-09-04 23:15:16,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:15:16,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:16,558 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:15:16,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:16,563 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-04 23:15:16,564 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2008192480] [2020-09-04 23:15:16,564 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:15:16,564 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-04 23:15:16,565 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978127625] [2020-09-04 23:15:16,566 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-04 23:15:16,567 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:15:16,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-04 23:15:16,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2020-09-04 23:15:16,568 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand 11 states. [2020-09-04 23:15:16,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:15:16,813 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2020-09-04 23:15:16,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-04 23:15:16,814 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 27 [2020-09-04 23:15:16,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:15:16,814 INFO L225 Difference]: With dead ends: 28 [2020-09-04 23:15:16,815 INFO L226 Difference]: Without dead ends: 0 [2020-09-04 23:15:16,817 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-09-04 23:15:16,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-09-04 23:15:16,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-09-04 23:15:16,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-09-04 23:15:16,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-09-04 23:15:16,819 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 27 [2020-09-04 23:15:16,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:15:16,819 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-09-04 23:15:16,819 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-04 23:15:16,819 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-09-04 23:15:16,819 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-09-04 23:15:16,821 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-04 23:15:16,824 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-09-04 23:15:17,088 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-09-04 23:15:17,088 INFO L271 CegarLoopResult]: At program point ULTIMATE.initEXIT(line -1) the Hoare annotation is: true [2020-09-04 23:15:17,088 INFO L271 CegarLoopResult]: At program point ULTIMATE.startEXIT(line -1) the Hoare annotation is: true [2020-09-04 23:15:17,088 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-09-04 23:15:17,089 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-09-04 23:15:17,089 INFO L271 CegarLoopResult]: At program point ULTIMATE.startFINAL(line -1) the Hoare annotation is: true [2020-09-04 23:15:17,089 INFO L268 CegarLoopResult]: For program point L4-3(lines 3 5) no Hoare annotation was computed. [2020-09-04 23:15:17,089 INFO L268 CegarLoopResult]: For program point assume_abort_if_notENTRY(lines 3 5) no Hoare annotation was computed. [2020-09-04 23:15:17,089 INFO L268 CegarLoopResult]: For program point L4(line 4) no Hoare annotation was computed. [2020-09-04 23:15:17,089 INFO L268 CegarLoopResult]: For program point L4-1(line 4) no Hoare annotation was computed. [2020-09-04 23:15:17,090 INFO L268 CegarLoopResult]: For program point assume_abort_if_notEXIT(lines 3 5) no Hoare annotation was computed. [2020-09-04 23:15:17,090 INFO L264 CegarLoopResult]: At program point L25(line 25) the Hoare annotation is: (<= 0 main_~b~0) [2020-09-04 23:15:17,090 INFO L271 CegarLoopResult]: At program point mainEXIT(lines 13 27) the Hoare annotation is: true [2020-09-04 23:15:17,090 INFO L264 CegarLoopResult]: At program point L23(line 23) the Hoare annotation is: (let ((.cse0 (+ main_~a~0 main_~b~0)) (.cse1 (+ main_~res~0 main_~cnt~0 1))) (and (<= (+ main_~res~0 1) .cse0) (<= .cse1 .cse0) (<= .cse0 .cse1) (<= 0 main_~b~0))) [2020-09-04 23:15:17,090 INFO L264 CegarLoopResult]: At program point L19(line 19) the Hoare annotation is: (<= 0 main_~b~0) [2020-09-04 23:15:17,091 INFO L264 CegarLoopResult]: At program point L21-2(lines 21 24) the Hoare annotation is: (let ((.cse1 (+ main_~res~0 main_~cnt~0)) (.cse0 (+ main_~a~0 main_~b~0))) (and (<= .cse0 .cse1) (<= 0 main_~b~0) (<= .cse1 .cse0) (<= main_~res~0 .cse0))) [2020-09-04 23:15:17,091 INFO L264 CegarLoopResult]: At program point L21-3(lines 21 24) the Hoare annotation is: (let ((.cse0 (+ main_~a~0 main_~b~0))) (and (<= .cse0 main_~res~0) (<= 0 main_~b~0) (<= main_~res~0 .cse0))) [2020-09-04 23:15:17,091 INFO L271 CegarLoopResult]: At program point L17(line 17) the Hoare annotation is: true [2020-09-04 23:15:17,091 INFO L271 CegarLoopResult]: At program point L17-1(line 17) the Hoare annotation is: true [2020-09-04 23:15:17,092 INFO L271 CegarLoopResult]: At program point L15(line 15) the Hoare annotation is: true [2020-09-04 23:15:17,092 INFO L271 CegarLoopResult]: At program point L15-1(line 15) the Hoare annotation is: true [2020-09-04 23:15:17,092 INFO L271 CegarLoopResult]: At program point L15-2(line 15) the Hoare annotation is: true [2020-09-04 23:15:17,092 INFO L271 CegarLoopResult]: At program point mainFINAL(lines 13 27) the Hoare annotation is: true [2020-09-04 23:15:17,092 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 13 27) the Hoare annotation is: true [2020-09-04 23:15:17,093 INFO L264 CegarLoopResult]: At program point L22(line 22) the Hoare annotation is: (let ((.cse1 (+ main_~res~0 main_~cnt~0)) (.cse0 (+ main_~a~0 main_~b~0))) (and (<= .cse0 .cse1) (<= (+ main_~res~0 1) .cse0) (<= 0 main_~b~0) (<= .cse1 .cse0))) [2020-09-04 23:15:17,093 INFO L264 CegarLoopResult]: At program point L20(line 20) the Hoare annotation is: (and (<= main_~a~0 main_~res~0) (<= main_~res~0 (+ main_~a~0 main_~b~0)) (<= main_~res~0 main_~a~0)) [2020-09-04 23:15:17,093 INFO L271 CegarLoopResult]: At program point L18(line 18) the Hoare annotation is: true [2020-09-04 23:15:17,093 INFO L271 CegarLoopResult]: At program point L18-1(line 18) the Hoare annotation is: true [2020-09-04 23:15:17,094 INFO L271 CegarLoopResult]: At program point L16(line 16) the Hoare annotation is: true [2020-09-04 23:15:17,094 INFO L271 CegarLoopResult]: At program point L16-1(line 16) the Hoare annotation is: true [2020-09-04 23:15:17,094 INFO L271 CegarLoopResult]: At program point L14(line 14) the Hoare annotation is: true [2020-09-04 23:15:17,094 INFO L271 CegarLoopResult]: At program point L14-1(line 14) the Hoare annotation is: true [2020-09-04 23:15:17,094 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 6 11) the Hoare annotation is: true [2020-09-04 23:15:17,095 INFO L264 CegarLoopResult]: At program point __VERIFIER_assertEXIT(lines 6 11) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| 0) (not (= __VERIFIER_assert_~cond 0))) [2020-09-04 23:15:17,095 INFO L264 CegarLoopResult]: At program point L8(line 8) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2020-09-04 23:15:17,095 INFO L264 CegarLoopResult]: At program point L7(lines 7 9) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| 0) (not (= __VERIFIER_assert_~cond 0))) [2020-09-04 23:15:17,095 INFO L264 CegarLoopResult]: At program point L7-2(lines 6 11) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| 0) (not (= __VERIFIER_assert_~cond 0))) [2020-09-04 23:15:17,096 INFO L264 CegarLoopResult]: At program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 8) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2020-09-04 23:15:17,121 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 04.09 11:15:17 BoogieIcfgContainer [2020-09-04 23:15:17,122 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-04 23:15:17,126 INFO L168 Benchmark]: Toolchain (without parser) took 2938.40 ms. Allocated memory was 138.4 MB in the beginning and 232.8 MB in the end (delta: 94.4 MB). Free memory was 102.3 MB in the beginning and 110.4 MB in the end (delta: -8.1 MB). Peak memory consumption was 86.3 MB. Max. memory is 7.1 GB. [2020-09-04 23:15:17,127 INFO L168 Benchmark]: CDTParser took 0.31 ms. Allocated memory is still 138.4 MB. Free memory was 121.0 MB in the beginning and 120.8 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-04 23:15:17,128 INFO L168 Benchmark]: CACSL2BoogieTranslator took 296.46 ms. Allocated memory is still 138.4 MB. Free memory was 102.1 MB in the beginning and 92.6 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. [2020-09-04 23:15:17,129 INFO L168 Benchmark]: Boogie Preprocessor took 107.82 ms. Allocated memory was 138.4 MB in the beginning and 199.8 MB in the end (delta: 61.3 MB). Free memory was 92.6 MB in the beginning and 179.7 MB in the end (delta: -87.2 MB). Peak memory consumption was 14.6 MB. Max. memory is 7.1 GB. [2020-09-04 23:15:17,130 INFO L168 Benchmark]: RCFGBuilder took 319.96 ms. Allocated memory is still 199.8 MB. Free memory was 179.7 MB in the beginning and 165.2 MB in the end (delta: 14.6 MB). Peak memory consumption was 14.6 MB. Max. memory is 7.1 GB. [2020-09-04 23:15:17,131 INFO L168 Benchmark]: TraceAbstraction took 2208.54 ms. Allocated memory was 199.8 MB in the beginning and 232.8 MB in the end (delta: 33.0 MB). Free memory was 164.5 MB in the beginning and 110.4 MB in the end (delta: 54.1 MB). Peak memory consumption was 87.2 MB. Max. memory is 7.1 GB. [2020-09-04 23:15:17,135 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31 ms. Allocated memory is still 138.4 MB. Free memory was 121.0 MB in the beginning and 120.8 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 296.46 ms. Allocated memory is still 138.4 MB. Free memory was 102.1 MB in the beginning and 92.6 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 107.82 ms. Allocated memory was 138.4 MB in the beginning and 199.8 MB in the end (delta: 61.3 MB). Free memory was 92.6 MB in the beginning and 179.7 MB in the end (delta: -87.2 MB). Peak memory consumption was 14.6 MB. Max. memory is 7.1 GB. * RCFGBuilder took 319.96 ms. Allocated memory is still 199.8 MB. Free memory was 179.7 MB in the beginning and 165.2 MB in the end (delta: 14.6 MB). Peak memory consumption was 14.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2208.54 ms. Allocated memory was 199.8 MB in the beginning and 232.8 MB in the end (delta: 33.0 MB). Free memory was 164.5 MB in the beginning and 110.4 MB in the end (delta: 54.1 MB). Peak memory consumption was 87.2 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: 21]: Loop Invariant Derived loop invariant: ((a + b <= res + cnt && 0 <= b) && res + cnt <= a + b) && res <= a + b - ProcedureContractResult [Line: 13]: Procedure Contract for main Derived contract for procedure main: 1 - ProcedureContractResult [Line: 6]: Procedure Contract for __VERIFIER_assert Derived contract for procedure __VERIFIER_assert: \old(cond) == 0 || !(cond == 0) - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 38 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 1.8s, OverallIterations: 3, TraceHistogramMax: 2, AutomataDifference: 0.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.2s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 66 SDtfs, 41 SDslu, 309 SDs, 0 SdLazy, 221 SolverSat, 15 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 52 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=33occurred in iteration=0, 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, 3 MinimizatonAttempts, 3 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 33 LocationsWithAnnotation, 51 PreInvPairs, 73 NumberOfFragments, 158 HoareAnnotationTreeSize, 51 FomulaSimplifications, 237 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 33 FomulaSimplificationsInter, 93 FormulaSimplificationTreeSizeReductionInter, 0.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.7s InterpolantComputationTime, 72 NumberOfCodeBlocks, 72 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 69 ConstructedInterpolants, 0 QuantifiedInterpolants, 7816 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 3 InterpolantComputations, 1 PerfectInterpolantSequences, 1/6 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...