/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/loop-zilu/benchmark09_conjunctive.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-dcfa08f [2020-12-23 07:15:50,499 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-23 07:15:50,505 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-23 07:15:50,565 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-23 07:15:50,566 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-23 07:15:50,570 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-23 07:15:50,574 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-23 07:15:50,580 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-23 07:15:50,584 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-23 07:15:50,590 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-23 07:15:50,595 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-23 07:15:50,596 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-23 07:15:50,597 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-23 07:15:50,600 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-23 07:15:50,603 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-23 07:15:50,604 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-23 07:15:50,606 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-23 07:15:50,609 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-23 07:15:50,616 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-23 07:15:50,625 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-23 07:15:50,627 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-23 07:15:50,629 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-23 07:15:50,630 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-23 07:15:50,633 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-23 07:15:50,652 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-23 07:15:50,670 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-23 07:15:50,672 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-23 07:15:50,673 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-23 07:15:50,674 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-23 07:15:50,722 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-23 07:15:50,722 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-23 07:15:50,726 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-23 07:15:50,727 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-23 07:15:50,727 INFO L138 SettingsManager]: * Use SBE=true [2020-12-23 07:15:50,727 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-23 07:15:50,728 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-23 07:15:50,728 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-23 07:15:50,728 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-23 07:15:50,728 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-23 07:15:50,729 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-23 07:15:50,730 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-23 07:15:50,730 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-23 07:15:50,730 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-23 07:15:50,731 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-23 07:15:50,731 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-23 07:15:50,731 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-23 07:15:50,731 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 07:15:50,731 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-23 07:15:50,732 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-23 07:15:50,732 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-23 07:15:50,732 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-23 07:15:50,732 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-23 07:15:50,733 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-23 07:15:50,733 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-23 07:15:50,733 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-23 07:15:51,188 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-23 07:15:51,235 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-23 07:15:51,240 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-23 07:15:51,241 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-23 07:15:51,242 INFO L275 PluginConnector]: CDTParser initialized [2020-12-23 07:15:51,243 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loop-zilu/benchmark09_conjunctive.i [2020-12-23 07:15:51,346 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/e31d388bb/08564c5c2b0a4be49e7efda635434927/FLAG96634df1d [2020-12-23 07:15:52,149 INFO L306 CDTParser]: Found 1 translation units. [2020-12-23 07:15:52,150 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/loop-zilu/benchmark09_conjunctive.i [2020-12-23 07:15:52,158 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/e31d388bb/08564c5c2b0a4be49e7efda635434927/FLAG96634df1d [2020-12-23 07:15:52,517 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/e31d388bb/08564c5c2b0a4be49e7efda635434927 [2020-12-23 07:15:52,521 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-23 07:15:52,523 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-23 07:15:52,525 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-23 07:15:52,526 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-23 07:15:52,530 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-23 07:15:52,531 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 07:15:52" (1/1) ... [2020-12-23 07:15:52,533 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7323b690 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:15:52, skipping insertion in model container [2020-12-23 07:15:52,533 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 07:15:52" (1/1) ... [2020-12-23 07:15:52,542 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-23 07:15:52,559 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-23 07:15:52,724 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/loop-zilu/benchmark09_conjunctive.i[873,886] [2020-12-23 07:15:52,738 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 07:15:52,750 INFO L203 MainTranslator]: Completed pre-run [2020-12-23 07:15:52,765 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/loop-zilu/benchmark09_conjunctive.i[873,886] [2020-12-23 07:15:52,768 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 07:15:52,785 INFO L208 MainTranslator]: Completed translation [2020-12-23 07:15:52,786 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:15:52 WrapperNode [2020-12-23 07:15:52,786 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-23 07:15:52,788 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-23 07:15:52,788 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-23 07:15:52,788 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-23 07:15:52,796 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:15:52" (1/1) ... [2020-12-23 07:15:52,804 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:15:52" (1/1) ... [2020-12-23 07:15:52,823 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-23 07:15:52,824 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-23 07:15:52,825 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-23 07:15:52,825 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-23 07:15:52,834 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:15:52" (1/1) ... [2020-12-23 07:15:52,835 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:15:52" (1/1) ... [2020-12-23 07:15:52,836 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:15:52" (1/1) ... [2020-12-23 07:15:52,837 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:15:52" (1/1) ... [2020-12-23 07:15:52,840 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:15:52" (1/1) ... [2020-12-23 07:15:52,845 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:15:52" (1/1) ... [2020-12-23 07:15:52,846 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:15:52" (1/1) ... [2020-12-23 07:15:52,848 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-23 07:15:52,850 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-23 07:15:52,850 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-23 07:15:52,850 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-23 07:15:52,851 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:15:52" (1/1) ... No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 07:15:52,981 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-23 07:15:52,982 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-23 07:15:52,982 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-23 07:15:52,982 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-23 07:15:53,221 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-23 07:15:53,222 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2020-12-23 07:15:53,223 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 07:15:53 BoogieIcfgContainer [2020-12-23 07:15:53,224 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-23 07:15:53,226 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-23 07:15:53,226 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-23 07:15:53,230 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-23 07:15:53,230 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.12 07:15:52" (1/3) ... [2020-12-23 07:15:53,231 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27ba5aa4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 07:15:53, skipping insertion in model container [2020-12-23 07:15:53,231 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:15:52" (2/3) ... [2020-12-23 07:15:53,232 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27ba5aa4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 07:15:53, skipping insertion in model container [2020-12-23 07:15:53,232 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 07:15:53" (3/3) ... [2020-12-23 07:15:53,234 INFO L111 eAbstractionObserver]: Analyzing ICFG benchmark09_conjunctive.i [2020-12-23 07:15:53,242 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-23 07:15:53,248 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-23 07:15:53,273 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-23 07:15:53,305 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-23 07:15:53,305 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-23 07:15:53,305 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-23 07:15:53,305 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-23 07:15:53,306 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-23 07:15:53,306 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-23 07:15:53,306 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-23 07:15:53,306 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-23 07:15:53,325 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states. [2020-12-23 07:15:53,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-23 07:15:53,331 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:15:53,332 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:15:53,333 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:15:53,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:15:53,341 INFO L82 PathProgramCache]: Analyzing trace with hash 1807243399, now seen corresponding path program 1 times [2020-12-23 07:15:53,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:15:53,354 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782317554] [2020-12-23 07:15:53,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:15:53,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:15:53,584 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:15:53,585 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782317554] [2020-12-23 07:15:53,586 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 07:15:53,587 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-23 07:15:53,587 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768495658] [2020-12-23 07:15:53,593 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-23 07:15:53,593 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:15:53,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-23 07:15:53,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-23 07:15:53,614 INFO L87 Difference]: Start difference. First operand 13 states. Second operand 2 states. [2020-12-23 07:15:53,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:15:53,633 INFO L93 Difference]: Finished difference Result 21 states and 25 transitions. [2020-12-23 07:15:53,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-23 07:15:53,635 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 7 [2020-12-23 07:15:53,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:15:53,646 INFO L225 Difference]: With dead ends: 21 [2020-12-23 07:15:53,646 INFO L226 Difference]: Without dead ends: 9 [2020-12-23 07:15:53,650 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-23 07:15:53,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2020-12-23 07:15:53,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2020-12-23 07:15:53,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2020-12-23 07:15:53,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2020-12-23 07:15:53,713 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 10 transitions. Word has length 7 [2020-12-23 07:15:53,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:15:53,714 INFO L481 AbstractCegarLoop]: Abstraction has 9 states and 10 transitions. [2020-12-23 07:15:53,714 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-23 07:15:53,714 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 10 transitions. [2020-12-23 07:15:53,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-23 07:15:53,715 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:15:53,715 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:15:53,716 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-23 07:15:53,716 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:15:53,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:15:53,720 INFO L82 PathProgramCache]: Analyzing trace with hash 1806975280, now seen corresponding path program 1 times [2020-12-23 07:15:53,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:15:53,721 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282600355] [2020-12-23 07:15:53,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:15:53,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:15:53,865 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:15:53,866 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282600355] [2020-12-23 07:15:53,866 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 07:15:53,866 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-23 07:15:53,867 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904987966] [2020-12-23 07:15:53,868 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 07:15:53,869 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:15:53,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 07:15:53,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-23 07:15:53,871 INFO L87 Difference]: Start difference. First operand 9 states and 10 transitions. Second operand 5 states. [2020-12-23 07:15:53,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:15:53,923 INFO L93 Difference]: Finished difference Result 14 states and 15 transitions. [2020-12-23 07:15:53,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 07:15:53,924 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 7 [2020-12-23 07:15:53,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:15:53,925 INFO L225 Difference]: With dead ends: 14 [2020-12-23 07:15:53,925 INFO L226 Difference]: Without dead ends: 10 [2020-12-23 07:15:53,926 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-12-23 07:15:53,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2020-12-23 07:15:53,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2020-12-23 07:15:53,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2020-12-23 07:15:53,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 11 transitions. [2020-12-23 07:15:53,931 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 11 transitions. Word has length 7 [2020-12-23 07:15:53,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:15:53,931 INFO L481 AbstractCegarLoop]: Abstraction has 10 states and 11 transitions. [2020-12-23 07:15:53,931 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 07:15:53,931 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 11 transitions. [2020-12-23 07:15:53,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-23 07:15:53,932 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:15:53,932 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:15:53,933 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-23 07:15:53,933 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:15:53,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:15:53,934 INFO L82 PathProgramCache]: Analyzing trace with hash 183324243, now seen corresponding path program 1 times [2020-12-23 07:15:53,934 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:15:53,935 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94987046] [2020-12-23 07:15:53,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:15:53,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:15:54,080 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:15:54,081 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94987046] [2020-12-23 07:15:54,081 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 07:15:54,081 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-23 07:15:54,082 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35823422] [2020-12-23 07:15:54,082 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 07:15:54,082 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:15:54,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 07:15:54,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-23 07:15:54,084 INFO L87 Difference]: Start difference. First operand 10 states and 11 transitions. Second operand 4 states. [2020-12-23 07:15:54,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:15:54,125 INFO L93 Difference]: Finished difference Result 14 states and 14 transitions. [2020-12-23 07:15:54,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 07:15:54,126 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2020-12-23 07:15:54,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:15:54,127 INFO L225 Difference]: With dead ends: 14 [2020-12-23 07:15:54,127 INFO L226 Difference]: Without dead ends: 10 [2020-12-23 07:15:54,128 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-23 07:15:54,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2020-12-23 07:15:54,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2020-12-23 07:15:54,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2020-12-23 07:15:54,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2020-12-23 07:15:54,132 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 8 [2020-12-23 07:15:54,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:15:54,132 INFO L481 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2020-12-23 07:15:54,132 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 07:15:54,133 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2020-12-23 07:15:54,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-23 07:15:54,133 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:15:54,133 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:15:54,134 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-23 07:15:54,134 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:15:54,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:15:54,135 INFO L82 PathProgramCache]: Analyzing trace with hash 1389600693, now seen corresponding path program 1 times [2020-12-23 07:15:54,135 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:15:54,136 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164253221] [2020-12-23 07:15:54,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:15:54,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:15:54,250 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:15:54,250 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164253221] [2020-12-23 07:15:54,251 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [990126911] [2020-12-23 07:15:54,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:15:54,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:15:54,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-23 07:15:54,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:15:54,421 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 07:15:54,429 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 07:15:54,450 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:15:54,450 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:15:54,451 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 9 [2020-12-23 07:15:54,451 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919030364] [2020-12-23 07:15:54,452 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 07:15:54,452 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:15:54,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 07:15:54,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-12-23 07:15:54,454 INFO L87 Difference]: Start difference. First operand 10 states and 10 transitions. Second operand 6 states. [2020-12-23 07:15:54,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:15:54,527 INFO L93 Difference]: Finished difference Result 10 states and 10 transitions. [2020-12-23 07:15:54,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 07:15:54,528 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 9 [2020-12-23 07:15:54,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:15:54,528 INFO L225 Difference]: With dead ends: 10 [2020-12-23 07:15:54,529 INFO L226 Difference]: Without dead ends: 0 [2020-12-23 07:15:54,530 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-12-23 07:15:54,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-12-23 07:15:54,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-12-23 07:15:54,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-12-23 07:15:54,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-12-23 07:15:54,531 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 9 [2020-12-23 07:15:54,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:15:54,531 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-12-23 07:15:54,531 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 07:15:54,532 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-12-23 07:15:54,532 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-12-23 07:15:54,745 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:15:54,750 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-12-23 07:15:54,784 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-12-23 07:15:54,784 INFO L192 CegarLoopUtils]: At program point L29(lines 19 30) the Hoare annotation is: true [2020-12-23 07:15:54,784 INFO L185 CegarLoopUtils]: At program point L23-2(lines 23 27) the Hoare annotation is: (and (<= ULTIMATE.start_main_~x~0 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~y~0 ULTIMATE.start_main_~x~0) (<= 0 ULTIMATE.start_main_~x~0)) [2020-12-23 07:15:54,785 INFO L189 CegarLoopUtils]: For program point L23-3(lines 23 27) no Hoare annotation was computed. [2020-12-23 07:15:54,785 INFO L189 CegarLoopUtils]: For program point L15(lines 15 17) no Hoare annotation was computed. [2020-12-23 07:15:54,785 INFO L189 CegarLoopUtils]: For program point L-1(line -1) no Hoare annotation was computed. [2020-12-23 07:15:54,785 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-12-23 07:15:54,785 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-12-23 07:15:54,786 INFO L189 CegarLoopUtils]: For program point L26(line 26) no Hoare annotation was computed. [2020-12-23 07:15:54,786 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 16) no Hoare annotation was computed. [2020-12-23 07:15:54,786 INFO L189 CegarLoopUtils]: For program point L22(line 22) no Hoare annotation was computed. [2020-12-23 07:15:54,786 INFO L189 CegarLoopUtils]: For program point L16(line 16) no Hoare annotation was computed. [2020-12-23 07:15:54,786 INFO L189 CegarLoopUtils]: For program point L14(lines 14 18) no Hoare annotation was computed. [2020-12-23 07:15:54,804 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.12 07:15:54 BoogieIcfgContainer [2020-12-23 07:15:54,804 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-23 07:15:54,805 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-23 07:15:54,805 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-23 07:15:54,806 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-23 07:15:54,806 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 07:15:53" (3/4) ... [2020-12-23 07:15:54,810 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-12-23 07:15:54,822 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2020-12-23 07:15:54,823 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2020-12-23 07:15:54,823 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-12-23 07:15:54,823 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-12-23 07:15:54,868 INFO L141 WitnessManager]: Wrote witness to /storage/repos/svcomp/c/loop-zilu/benchmark09_conjunctive.i-witness.graphml [2020-12-23 07:15:54,868 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-23 07:15:54,870 INFO L168 Benchmark]: Toolchain (without parser) took 2346.06 ms. Allocated memory is still 156.2 MB. Free memory was 131.4 MB in the beginning and 71.0 MB in the end (delta: 60.4 MB). Peak memory consumption was 59.8 MB. Max. memory is 8.0 GB. [2020-12-23 07:15:54,871 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 156.2 MB. Free memory is still 128.7 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-12-23 07:15:54,872 INFO L168 Benchmark]: CACSL2BoogieTranslator took 261.36 ms. Allocated memory is still 156.2 MB. Free memory was 131.2 MB in the beginning and 121.7 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-12-23 07:15:54,872 INFO L168 Benchmark]: Boogie Procedure Inliner took 36.03 ms. Allocated memory is still 156.2 MB. Free memory was 121.7 MB in the beginning and 120.3 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-12-23 07:15:54,873 INFO L168 Benchmark]: Boogie Preprocessor took 24.36 ms. Allocated memory is still 156.2 MB. Free memory was 120.3 MB in the beginning and 119.3 MB in the end (delta: 991.6 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-12-23 07:15:54,874 INFO L168 Benchmark]: RCFGBuilder took 374.09 ms. Allocated memory is still 156.2 MB. Free memory was 119.3 MB in the beginning and 108.1 MB in the end (delta: 11.2 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. [2020-12-23 07:15:54,875 INFO L168 Benchmark]: TraceAbstraction took 1578.87 ms. Allocated memory is still 156.2 MB. Free memory was 107.7 MB in the beginning and 73.6 MB in the end (delta: 34.1 MB). Peak memory consumption was 34.6 MB. Max. memory is 8.0 GB. [2020-12-23 07:15:54,875 INFO L168 Benchmark]: Witness Printer took 62.90 ms. Allocated memory is still 156.2 MB. Free memory was 73.6 MB in the beginning and 71.0 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-12-23 07:15:54,879 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 156.2 MB. Free memory is still 128.7 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 261.36 ms. Allocated memory is still 156.2 MB. Free memory was 131.2 MB in the beginning and 121.7 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 36.03 ms. Allocated memory is still 156.2 MB. Free memory was 121.7 MB in the beginning and 120.3 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 24.36 ms. Allocated memory is still 156.2 MB. Free memory was 120.3 MB in the beginning and 119.3 MB in the end (delta: 991.6 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 374.09 ms. Allocated memory is still 156.2 MB. Free memory was 119.3 MB in the beginning and 108.1 MB in the end (delta: 11.2 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1578.87 ms. Allocated memory is still 156.2 MB. Free memory was 107.7 MB in the beginning and 73.6 MB in the end (delta: 34.1 MB). Peak memory consumption was 34.6 MB. Max. memory is 8.0 GB. * Witness Printer took 62.90 ms. Allocated memory is still 156.2 MB. Free memory was 73.6 MB in the beginning and 71.0 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 16]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 23]: Loop Invariant Derived loop invariant: (x <= y && y <= x) && 0 <= x - InvariantResult [Line: 19]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 13 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 1.4s, OverallIterations: 4, TraceHistogramMax: 1, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 30 SDtfs, 19 SDslu, 16 SDs, 0 SdLazy, 33 SolverSat, 3 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 31 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=13occurred 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, 4 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 2 LocationsWithAnnotation, 2 PreInvPairs, 4 NumberOfFragments, 11 HoareAnnotationTreeSize, 2 FomulaSimplifications, 26 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 2 FomulaSimplificationsInter, 3 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.4s InterpolantComputationTime, 40 NumberOfCodeBlocks, 40 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 35 ConstructedInterpolants, 0 QuantifiedInterpolants, 921 SizeOfPredicates, 3 NumberOfNonLiveVariables, 52 ConjunctsInSsa, 8 ConjunctsInUnsatCore, 5 InterpolantComputations, 4 PerfectInterpolantSequences, 1/2 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...