/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 -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/loop-invariants/eq2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-72570d3 [2020-08-22 19:50:25,537 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 19:50:25,541 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 19:50:25,583 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-22 19:50:25,584 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-22 19:50:25,597 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-22 19:50:25,599 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-22 19:50:25,601 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-22 19:50:25,605 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-22 19:50:25,606 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-22 19:50:25,611 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-22 19:50:25,614 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-22 19:50:25,614 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 19:50:25,616 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 19:50:25,620 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 19:50:25,622 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 19:50:25,623 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 19:50:25,624 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 19:50:25,627 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 19:50:25,633 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 19:50:25,637 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 19:50:25,639 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 19:50:25,641 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 19:50:25,642 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 19:50:25,648 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-22 19:50:25,661 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 19:50:25,663 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 19:50:25,664 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 19:50:25,665 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-08-22 19:50:25,680 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 19:50:25,680 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 19:50:25,683 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 19:50:25,684 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 19:50:25,684 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 19:50:25,684 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 19:50:25,684 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 19:50:25,685 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 19:50:25,685 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 19:50:25,685 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 19:50:25,686 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 19:50:25,687 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 19:50:25,687 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 19:50:25,687 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 19:50:25,688 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 19:50:25,688 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-08-22 19:50:25,688 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 19:50:25,688 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 19:50:25,688 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 19:50:25,689 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 19:50:25,689 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-08-22 19:50:25,689 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 19:50:25,689 INFO L138 SettingsManager]: * Use separate solver for trace checks=false [2020-08-22 19:50:26,009 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 19:50:26,022 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 19:50:26,026 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 19:50:26,028 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 19:50:26,028 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 19:50:26,029 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invariants/eq2.c [2020-08-22 19:50:26,116 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/68820317e/493825dc7f134689800d4180d1ba98f4/FLAG1ede9259b [2020-08-22 19:50:26,622 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 19:50:26,623 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-invariants/eq2.c [2020-08-22 19:50:26,629 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/68820317e/493825dc7f134689800d4180d1ba98f4/FLAG1ede9259b [2020-08-22 19:50:27,025 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/68820317e/493825dc7f134689800d4180d1ba98f4 [2020-08-22 19:50:27,037 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 19:50:27,039 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 19:50:27,040 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 19:50:27,041 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 19:50:27,045 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 19:50:27,046 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 07:50:27" (1/1) ... [2020-08-22 19:50:27,050 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4f02a612 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:50:27, skipping insertion in model container [2020-08-22 19:50:27,050 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 07:50:27" (1/1) ... [2020-08-22 19:50:27,058 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 19:50:27,078 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 19:50:27,264 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 19:50:27,269 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 19:50:27,286 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 19:50:27,303 INFO L208 MainTranslator]: Completed translation [2020-08-22 19:50:27,304 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:50:27 WrapperNode [2020-08-22 19:50:27,304 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 19:50:27,305 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 19:50:27,305 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 19:50:27,305 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 19:50:27,401 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:50:27" (1/1) ... [2020-08-22 19:50:27,401 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:50:27" (1/1) ... [2020-08-22 19:50:27,410 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:50:27" (1/1) ... [2020-08-22 19:50:27,411 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:50:27" (1/1) ... [2020-08-22 19:50:27,415 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:50:27" (1/1) ... [2020-08-22 19:50:27,420 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:50:27" (1/1) ... [2020-08-22 19:50:27,420 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:50:27" (1/1) ... [2020-08-22 19:50:27,421 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 19:50:27,422 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 19:50:27,422 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 19:50:27,422 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 19:50:27,423 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:50:27" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 19:50:27,476 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 19:50:27,477 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 19:50:27,477 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-22 19:50:27,477 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 19:50:27,477 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 19:50:27,477 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-08-22 19:50:27,477 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-22 19:50:27,477 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 19:50:27,477 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 19:50:27,477 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 19:50:27,667 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 19:50:27,668 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-22 19:50:27,672 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 07:50:27 BoogieIcfgContainer [2020-08-22 19:50:27,672 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 19:50:27,673 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 19:50:27,673 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 19:50:27,677 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 19:50:27,677 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 07:50:27" (1/3) ... [2020-08-22 19:50:27,678 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ab2a24b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 07:50:27, skipping insertion in model container [2020-08-22 19:50:27,679 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:50:27" (2/3) ... [2020-08-22 19:50:27,679 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ab2a24b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 07:50:27, skipping insertion in model container [2020-08-22 19:50:27,679 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 07:50:27" (3/3) ... [2020-08-22 19:50:27,681 INFO L109 eAbstractionObserver]: Analyzing ICFG eq2.c [2020-08-22 19:50:27,693 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-22 19:50:27,701 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 19:50:27,712 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 19:50:27,734 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 19:50:27,734 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 19:50:27,734 INFO L377 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-08-22 19:50:27,734 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 19:50:27,735 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 19:50:27,735 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 19:50:27,735 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 19:50:27,735 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 19:50:27,752 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states. [2020-08-22 19:50:27,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-08-22 19:50:27,763 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:50:27,764 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:50:27,765 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:50:27,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:50:27,773 INFO L82 PathProgramCache]: Analyzing trace with hash 1881134399, now seen corresponding path program 1 times [2020-08-22 19:50:27,780 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:50:27,781 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [702437486] [2020-08-22 19:50:27,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:50:27,839 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:50:27,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:50:27,900 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:50:27,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:50:27,907 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:50:27,910 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [702437486] [2020-08-22 19:50:27,912 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:50:27,913 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-08-22 19:50:27,913 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25567478] [2020-08-22 19:50:27,918 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-08-22 19:50:27,918 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:50:27,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-08-22 19:50:27,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-08-22 19:50:27,934 INFO L87 Difference]: Start difference. First operand 30 states. Second operand 2 states. [2020-08-22 19:50:27,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:50:27,969 INFO L93 Difference]: Finished difference Result 42 states and 45 transitions. [2020-08-22 19:50:27,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-08-22 19:50:27,970 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 14 [2020-08-22 19:50:27,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:50:27,980 INFO L225 Difference]: With dead ends: 42 [2020-08-22 19:50:27,980 INFO L226 Difference]: Without dead ends: 23 [2020-08-22 19:50:27,985 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-08-22 19:50:28,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-08-22 19:50:28,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-08-22 19:50:28,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-08-22 19:50:28,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2020-08-22 19:50:28,037 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 14 [2020-08-22 19:50:28,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:50:28,038 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2020-08-22 19:50:28,038 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-08-22 19:50:28,039 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2020-08-22 19:50:28,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-08-22 19:50:28,039 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:50:28,040 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:50:28,040 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 19:50:28,041 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:50:28,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:50:28,041 INFO L82 PathProgramCache]: Analyzing trace with hash 2108856515, now seen corresponding path program 1 times [2020-08-22 19:50:28,042 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:50:28,042 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [922891882] [2020-08-22 19:50:28,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:50:28,044 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:50:28,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:50:28,542 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:50:28,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:50:28,550 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:50:28,551 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [922891882] [2020-08-22 19:50:28,551 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:50:28,551 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-22 19:50:28,552 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922625906] [2020-08-22 19:50:28,553 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-22 19:50:28,553 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:50:28,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-22 19:50:28,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-08-22 19:50:28,554 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 7 states. [2020-08-22 19:50:28,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:50:28,695 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2020-08-22 19:50:28,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-22 19:50:28,696 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 15 [2020-08-22 19:50:28,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:50:28,697 INFO L225 Difference]: With dead ends: 33 [2020-08-22 19:50:28,698 INFO L226 Difference]: Without dead ends: 27 [2020-08-22 19:50:28,700 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-08-22 19:50:28,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-08-22 19:50:28,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 24. [2020-08-22 19:50:28,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-08-22 19:50:28,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2020-08-22 19:50:28,712 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 15 [2020-08-22 19:50:28,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:50:28,713 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2020-08-22 19:50:28,713 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-22 19:50:28,713 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2020-08-22 19:50:28,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-22 19:50:28,714 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:50:28,714 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] [2020-08-22 19:50:28,715 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 19:50:28,715 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:50:28,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:50:28,716 INFO L82 PathProgramCache]: Analyzing trace with hash -134436921, now seen corresponding path program 1 times [2020-08-22 19:50:28,716 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:50:28,716 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [806635428] [2020-08-22 19:50:28,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:50:28,750 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:50:28,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:50:29,096 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:50:29,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:50:29,113 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:50:29,114 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [806635428] [2020-08-22 19:50:29,114 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:50:29,114 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-08-22 19:50:29,115 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812233694] [2020-08-22 19:50:29,115 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-22 19:50:29,116 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:50:29,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-22 19:50:29,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2020-08-22 19:50:29,117 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand 11 states. [2020-08-22 19:50:29,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:50:29,419 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2020-08-22 19:50:29,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-22 19:50:29,419 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 23 [2020-08-22 19:50:29,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:50:29,420 INFO L225 Difference]: With dead ends: 27 [2020-08-22 19:50:29,420 INFO L226 Difference]: Without dead ends: 0 [2020-08-22 19:50:29,422 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2020-08-22 19:50:29,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-22 19:50:29,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-22 19:50:29,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-22 19:50:29,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-22 19:50:29,423 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 23 [2020-08-22 19:50:29,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:50:29,423 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-22 19:50:29,423 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-22 19:50:29,424 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-22 19:50:29,424 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-22 19:50:29,424 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-22 19:50:29,427 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-22 19:50:29,780 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-08-22 19:50:29,781 INFO L271 CegarLoopResult]: At program point ULTIMATE.initEXIT(line -1) the Hoare annotation is: true [2020-08-22 19:50:29,781 INFO L271 CegarLoopResult]: At program point ULTIMATE.startEXIT(line -1) the Hoare annotation is: true [2020-08-22 19:50:29,781 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-22 19:50:29,781 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-22 19:50:29,781 INFO L271 CegarLoopResult]: At program point ULTIMATE.startFINAL(line -1) the Hoare annotation is: true [2020-08-22 19:50:29,782 INFO L271 CegarLoopResult]: At program point mainEXIT(lines 9 20) the Hoare annotation is: true [2020-08-22 19:50:29,782 INFO L264 CegarLoopResult]: At program point L15(line 15) the Hoare annotation is: (and (<= main_~y~0 main_~z~0) (<= main_~z~0 main_~y~0) (= main_~x~0 main_~w~0)) [2020-08-22 19:50:29,782 INFO L264 CegarLoopResult]: At program point L15-1(line 15) the Hoare annotation is: (and (<= main_~y~0 main_~z~0) (<= main_~z~0 |main_#t~post2|) (<= main_~z~0 main_~y~0) (= main_~x~0 main_~w~0) (<= |main_#t~post2| main_~z~0)) [2020-08-22 19:50:29,782 INFO L264 CegarLoopResult]: At program point L13(line 13) the Hoare annotation is: (let ((.cse0 (+ main_~x~0 1))) (and (<= main_~y~0 .cse0) (<= .cse0 main_~y~0) (= main_~w~0 main_~x~0))) [2020-08-22 19:50:29,783 INFO L264 CegarLoopResult]: At program point L15-2(line 15) the Hoare annotation is: (let ((.cse0 (+ main_~z~0 1))) (and (<= .cse0 main_~y~0) (<= main_~y~0 .cse0) (<= main_~z~0 |main_#t~post2|) (= main_~w~0 main_~x~0) (<= |main_#t~post2| main_~z~0))) [2020-08-22 19:50:29,783 INFO L271 CegarLoopResult]: At program point mainFINAL(lines 9 20) the Hoare annotation is: true [2020-08-22 19:50:29,783 INFO L271 CegarLoopResult]: At program point L11(line 11) the Hoare annotation is: true [2020-08-22 19:50:29,783 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 9 20) the Hoare annotation is: true [2020-08-22 19:50:29,784 INFO L271 CegarLoopResult]: At program point L18(line 18) the Hoare annotation is: true [2020-08-22 19:50:29,785 INFO L264 CegarLoopResult]: At program point L16(line 16) the Hoare annotation is: (let ((.cse0 (+ main_~z~0 1))) (and (<= .cse0 main_~y~0) (<= main_~y~0 .cse0) (= main_~w~0 main_~x~0))) [2020-08-22 19:50:29,785 INFO L264 CegarLoopResult]: At program point L16-1(line 16) the Hoare annotation is: (let ((.cse1 (+ main_~z~0 1)) (.cse0 (+ |main_#t~post3| 1))) (and (<= main_~y~0 .cse0) (<= .cse1 main_~y~0) (<= main_~y~0 .cse1) (= main_~w~0 main_~x~0) (<= .cse0 main_~y~0))) [2020-08-22 19:50:29,786 INFO L264 CegarLoopResult]: At program point L16-2(line 16) the Hoare annotation is: (let ((.cse0 (+ |main_#t~post3| 1))) (and (<= main_~y~0 .cse0) (<= main_~y~0 main_~z~0) (= main_~w~0 main_~x~0) (<= .cse0 main_~y~0) (<= main_~z~0 main_~y~0))) [2020-08-22 19:50:29,786 INFO L264 CegarLoopResult]: At program point L14-1(line 14) the Hoare annotation is: (let ((.cse3 (= main_~w~0 main_~x~0))) (or (let ((.cse5 (div main_~z~0 4294967296)) (.cse4 (div main_~y~0 4294967296))) (let ((.cse0 (+ main_~x~0 1)) (.cse2 (+ main_~z~0 (* 4294967296 .cse4))) (.cse1 (* 4294967296 .cse5))) (and (<= main_~y~0 .cse0) (<= (+ main_~y~0 .cse1) .cse2) (<= .cse0 main_~y~0) (< .cse2 (+ main_~y~0 .cse1 1)) .cse3 (< .cse4 (+ .cse5 1))))) (and (<= main_~y~0 main_~z~0) .cse3 (<= main_~z~0 main_~y~0)))) [2020-08-22 19:50:29,787 INFO L264 CegarLoopResult]: At program point L12(line 12) the Hoare annotation is: (= main_~w~0 main_~x~0) [2020-08-22 19:50:29,787 INFO L264 CegarLoopResult]: At program point L14-3(line 14) the Hoare annotation is: (and (<= main_~y~0 main_~z~0) (<= main_~z~0 main_~y~0) (= main_~x~0 main_~w~0)) [2020-08-22 19:50:29,787 INFO L271 CegarLoopResult]: At program point L10(line 10) the Hoare annotation is: true [2020-08-22 19:50:29,787 INFO L264 CegarLoopResult]: At program point L14-4(lines 14 17) the Hoare annotation is: (and (<= main_~y~0 main_~z~0) (<= main_~z~0 main_~y~0) (= main_~x~0 main_~w~0)) [2020-08-22 19:50:29,788 INFO L264 CegarLoopResult]: At program point L14-5(lines 14 17) the Hoare annotation is: (let ((.cse3 (= main_~w~0 main_~x~0))) (or (let ((.cse5 (div main_~z~0 4294967296)) (.cse4 (div main_~y~0 4294967296))) (let ((.cse0 (+ main_~x~0 1)) (.cse2 (+ main_~z~0 (* 4294967296 .cse4))) (.cse1 (* 4294967296 .cse5))) (and (<= main_~y~0 .cse0) (<= (+ main_~y~0 .cse1) .cse2) (<= .cse0 main_~y~0) (< .cse2 (+ main_~y~0 .cse1 1)) .cse3 (< .cse4 (+ .cse5 1))))) (and (<= main_~y~0 main_~z~0) .cse3 (<= main_~z~0 main_~y~0)))) [2020-08-22 19:50:29,788 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 3 8) the Hoare annotation is: true [2020-08-22 19:50:29,788 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertEXIT(lines 3 8) the Hoare annotation is: true [2020-08-22 19:50:29,788 INFO L264 CegarLoopResult]: At program point L5(line 5) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2020-08-22 19:50:29,789 INFO L264 CegarLoopResult]: At program point L4(lines 4 6) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| 0) (not (= __VERIFIER_assert_~cond 0))) [2020-08-22 19:50:29,789 INFO L264 CegarLoopResult]: At program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 5) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2020-08-22 19:50:29,789 INFO L271 CegarLoopResult]: At program point L4-2(lines 3 8) the Hoare annotation is: true [2020-08-22 19:50:29,820 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.08 07:50:29 BoogieIcfgContainer [2020-08-22 19:50:29,821 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-22 19:50:29,827 INFO L168 Benchmark]: Toolchain (without parser) took 2784.48 ms. Allocated memory was 138.9 MB in the beginning and 235.4 MB in the end (delta: 96.5 MB). Free memory was 101.9 MB in the beginning and 149.6 MB in the end (delta: -47.7 MB). Peak memory consumption was 48.8 MB. Max. memory is 7.1 GB. [2020-08-22 19:50:29,831 INFO L168 Benchmark]: CDTParser took 0.32 ms. Allocated memory is still 138.9 MB. Free memory was 120.2 MB in the beginning and 120.0 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. [2020-08-22 19:50:29,833 INFO L168 Benchmark]: CACSL2BoogieTranslator took 263.98 ms. Allocated memory is still 138.9 MB. Free memory was 101.7 MB in the beginning and 91.9 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. [2020-08-22 19:50:29,835 INFO L168 Benchmark]: Boogie Preprocessor took 116.85 ms. Allocated memory was 138.9 MB in the beginning and 202.4 MB in the end (delta: 63.4 MB). Free memory was 91.9 MB in the beginning and 180.9 MB in the end (delta: -89.0 MB). Peak memory consumption was 13.6 MB. Max. memory is 7.1 GB. [2020-08-22 19:50:29,838 INFO L168 Benchmark]: RCFGBuilder took 250.14 ms. Allocated memory is still 202.4 MB. Free memory was 180.9 MB in the beginning and 168.5 MB in the end (delta: 12.3 MB). Peak memory consumption was 12.3 MB. Max. memory is 7.1 GB. [2020-08-22 19:50:29,846 INFO L168 Benchmark]: TraceAbstraction took 2147.60 ms. Allocated memory was 202.4 MB in the beginning and 235.4 MB in the end (delta: 33.0 MB). Free memory was 167.9 MB in the beginning and 149.6 MB in the end (delta: 18.3 MB). Peak memory consumption was 51.3 MB. Max. memory is 7.1 GB. [2020-08-22 19:50:29,859 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.32 ms. Allocated memory is still 138.9 MB. Free memory was 120.2 MB in the beginning and 120.0 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 263.98 ms. Allocated memory is still 138.9 MB. Free memory was 101.7 MB in the beginning and 91.9 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 116.85 ms. Allocated memory was 138.9 MB in the beginning and 202.4 MB in the end (delta: 63.4 MB). Free memory was 91.9 MB in the beginning and 180.9 MB in the end (delta: -89.0 MB). Peak memory consumption was 13.6 MB. Max. memory is 7.1 GB. * RCFGBuilder took 250.14 ms. Allocated memory is still 202.4 MB. Free memory was 180.9 MB in the beginning and 168.5 MB in the end (delta: 12.3 MB). Peak memory consumption was 12.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2147.60 ms. Allocated memory was 202.4 MB in the beginning and 235.4 MB in the end (delta: 33.0 MB). Free memory was 167.9 MB in the beginning and 149.6 MB in the end (delta: 18.3 MB). Peak memory consumption was 51.3 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 5]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 14]: Loop Invariant Derived loop invariant: (y <= z && z <= y) && x == w - ProcedureContractResult [Line: 9]: Procedure Contract for main Derived contract for procedure main: 1 - ProcedureContractResult [Line: 3]: Procedure Contract for __VERIFIER_assert Derived contract for procedure __VERIFIER_assert: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 30 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 1.6s, OverallIterations: 3, TraceHistogramMax: 1, AutomataDifference: 0.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.3s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 63 SDtfs, 58 SDslu, 171 SDs, 0 SdLazy, 74 SolverSat, 8 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 39 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=30occurred 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, 1 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 30 LocationsWithAnnotation, 42 PreInvPairs, 58 NumberOfFragments, 300 HoareAnnotationTreeSize, 42 FomulaSimplifications, 478 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 30 FomulaSimplificationsInter, 5 FormulaSimplificationTreeSizeReductionInter, 0.2s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: No data available, 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...