/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.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/loops/sum01_bug02.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-7d8eed3 [2020-11-07 06:35:15,693 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-07 06:35:15,698 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-07 06:35:15,741 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-11-07 06:35:15,754 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-07 06:35:15,755 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-07 06:35:15,757 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-07 06:35:15,758 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-07 06:35:15,762 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-07 06:35:15,763 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-07 06:35:15,765 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-07 06:35:15,768 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-07 06:35:15,770 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-07 06:35:15,778 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-07 06:35:15,779 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-07 06:35:15,780 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-07 06:35:15,786 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-11-07 06:35:15,824 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-11-07 06:35:15,848 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-07 06:35:15,848 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-07 06:35:15,853 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-07 06:35:15,853 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-07 06:35:15,853 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-07 06:35:15,853 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-07 06:35:15,854 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-07 06:35:15,854 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-07 06:35:15,854 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-07 06:35:15,854 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-07 06:35:15,855 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-07 06:35:15,856 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-07 06:35:15,856 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-07 06:35:15,856 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-07 06:35:15,856 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-07 06:35:15,856 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-11-07 06:35:15,857 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-07 06:35:15,857 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-07 06:35:15,857 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-07 06:35:15,857 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-07 06:35:15,857 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-11-07 06:35:15,857 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-07 06:35:15,858 INFO L138 SettingsManager]: * Use separate solver for trace checks=false 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/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use separate solver for trace checks -> true [2020-11-07 06:35:16,303 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-07 06:35:16,333 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-07 06:35:16,336 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-07 06:35:16,338 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-07 06:35:16,338 INFO L275 PluginConnector]: CDTParser initialized [2020-11-07 06:35:16,339 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/sum01_bug02.i [2020-11-07 06:35:16,439 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2c365abb1/fdd3198a77624b12a371b439875f5bf5/FLAG72019c20e [2020-11-07 06:35:17,171 INFO L306 CDTParser]: Found 1 translation units. [2020-11-07 06:35:17,172 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/sum01_bug02.i [2020-11-07 06:35:17,181 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2c365abb1/fdd3198a77624b12a371b439875f5bf5/FLAG72019c20e [2020-11-07 06:35:17,528 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2c365abb1/fdd3198a77624b12a371b439875f5bf5 [2020-11-07 06:35:17,531 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-07 06:35:17,538 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-11-07 06:35:17,540 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-07 06:35:17,540 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-07 06:35:17,544 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-07 06:35:17,545 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 06:35:17" (1/1) ... [2020-11-07 06:35:17,549 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6e62043d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:35:17, skipping insertion in model container [2020-11-07 06:35:17,550 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 06:35:17" (1/1) ... [2020-11-07 06:35:17,558 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-07 06:35:17,574 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-07 06:35:17,746 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-07 06:35:17,756 INFO L203 MainTranslator]: Completed pre-run [2020-11-07 06:35:17,774 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-07 06:35:17,792 INFO L208 MainTranslator]: Completed translation [2020-11-07 06:35:17,793 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:35:17 WrapperNode [2020-11-07 06:35:17,793 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-07 06:35:17,794 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-07 06:35:17,794 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-07 06:35:17,795 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-07 06:35:17,808 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:35:17" (1/1) ... [2020-11-07 06:35:17,808 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:35:17" (1/1) ... [2020-11-07 06:35:17,815 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:35:17" (1/1) ... [2020-11-07 06:35:17,815 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:35:17" (1/1) ... [2020-11-07 06:35:17,822 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:35:17" (1/1) ... [2020-11-07 06:35:17,826 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:35:17" (1/1) ... [2020-11-07 06:35:17,828 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:35:17" (1/1) ... [2020-11-07 06:35:17,830 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-07 06:35:17,831 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-07 06:35:17,831 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-07 06:35:17,832 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-07 06:35:17,832 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:35:17" (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 [2020-11-07 06:35:17,918 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-11-07 06:35:17,919 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-07 06:35:17,919 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-11-07 06:35:17,920 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-11-07 06:35:17,920 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-11-07 06:35:17,921 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-11-07 06:35:17,921 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-11-07 06:35:17,921 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-11-07 06:35:17,922 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-11-07 06:35:17,922 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-11-07 06:35:17,922 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-07 06:35:17,922 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-11-07 06:35:17,923 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-11-07 06:35:17,923 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-11-07 06:35:17,923 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-11-07 06:35:17,924 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-07 06:35:17,924 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-07 06:35:17,924 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-07 06:35:17,925 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-07 06:35:17,926 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-07 06:35:18,402 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-07 06:35:18,402 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-11-07 06:35:18,407 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 06:35:18 BoogieIcfgContainer [2020-11-07 06:35:18,408 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-07 06:35:18,410 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-07 06:35:18,410 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-07 06:35:18,415 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-07 06:35:18,416 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 06:35:17" (1/3) ... [2020-11-07 06:35:18,417 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5632bfeb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 06:35:18, skipping insertion in model container [2020-11-07 06:35:18,417 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:35:17" (2/3) ... [2020-11-07 06:35:18,418 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5632bfeb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 06:35:18, skipping insertion in model container [2020-11-07 06:35:18,418 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 06:35:18" (3/3) ... [2020-11-07 06:35:18,420 INFO L111 eAbstractionObserver]: Analyzing ICFG sum01_bug02.i [2020-11-07 06:35:18,438 INFO L179 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-11-07 06:35:18,442 INFO L191 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-07 06:35:18,456 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-07 06:35:18,494 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-07 06:35:18,494 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-07 06:35:18,494 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-11-07 06:35:18,494 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-07 06:35:18,494 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-07 06:35:18,495 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-07 06:35:18,495 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-07 06:35:18,495 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-07 06:35:18,519 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states. [2020-11-07 06:35:18,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-11-07 06:35:18,534 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:35:18,535 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] [2020-11-07 06:35:18,536 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:35:18,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:35:18,547 INFO L82 PathProgramCache]: Analyzing trace with hash -1030168209, now seen corresponding path program 1 times [2020-11-07 06:35:18,558 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:35:18,559 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1479059288] [2020-11-07 06:35:18,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:35:18,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:35:19,042 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:35:19,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:35:19,067 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:35:19,068 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1479059288] [2020-11-07 06:35:19,070 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 06:35:19,070 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-11-07 06:35:19,071 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527339015] [2020-11-07 06:35:19,076 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-07 06:35:19,077 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:35:19,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-07 06:35:19,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-11-07 06:35:19,095 INFO L87 Difference]: Start difference. First operand 43 states. Second operand 6 states. [2020-11-07 06:35:19,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:35:19,463 INFO L93 Difference]: Finished difference Result 72 states and 84 transitions. [2020-11-07 06:35:19,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-07 06:35:19,465 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 24 [2020-11-07 06:35:19,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:35:19,475 INFO L225 Difference]: With dead ends: 72 [2020-11-07 06:35:19,475 INFO L226 Difference]: Without dead ends: 42 [2020-11-07 06:35:19,479 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2020-11-07 06:35:19,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-11-07 06:35:19,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2020-11-07 06:35:19,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-11-07 06:35:19,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 43 transitions. [2020-11-07 06:35:19,543 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 43 transitions. Word has length 24 [2020-11-07 06:35:19,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:35:19,544 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 43 transitions. [2020-11-07 06:35:19,544 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-07 06:35:19,544 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 43 transitions. [2020-11-07 06:35:19,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-11-07 06:35:19,547 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:35:19,548 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:35:19,549 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-07 06:35:19,549 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:35:19,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:35:19,550 INFO L82 PathProgramCache]: Analyzing trace with hash 540023015, now seen corresponding path program 1 times [2020-11-07 06:35:19,550 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:35:19,551 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1444254512] [2020-11-07 06:35:19,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:35:19,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:35:19,996 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:35:20,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:35:20,014 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:35:20,015 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1444254512] [2020-11-07 06:35:20,015 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:35:20,015 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-11-07 06:35:20,016 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298964526] [2020-11-07 06:35:20,017 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-11-07 06:35:20,018 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:35:20,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-07 06:35:20,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2020-11-07 06:35:20,020 INFO L87 Difference]: Start difference. First operand 41 states and 43 transitions. Second operand 12 states. [2020-11-07 06:35:20,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:35:20,650 INFO L93 Difference]: Finished difference Result 71 states and 75 transitions. [2020-11-07 06:35:20,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-11-07 06:35:20,651 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 33 [2020-11-07 06:35:20,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:35:20,655 INFO L225 Difference]: With dead ends: 71 [2020-11-07 06:35:20,655 INFO L226 Difference]: Without dead ends: 64 [2020-11-07 06:35:20,657 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=88, Invalid=374, Unknown=0, NotChecked=0, Total=462 [2020-11-07 06:35:20,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-11-07 06:35:20,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 51. [2020-11-07 06:35:20,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-11-07 06:35:20,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 54 transitions. [2020-11-07 06:35:20,676 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 54 transitions. Word has length 33 [2020-11-07 06:35:20,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:35:20,677 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 54 transitions. [2020-11-07 06:35:20,677 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-11-07 06:35:20,677 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 54 transitions. [2020-11-07 06:35:20,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-11-07 06:35:20,679 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:35:20,679 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:35:20,682 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-07 06:35:20,683 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:35:20,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:35:20,684 INFO L82 PathProgramCache]: Analyzing trace with hash 577297853, now seen corresponding path program 1 times [2020-11-07 06:35:20,684 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:35:20,684 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1521432066] [2020-11-07 06:35:20,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:35:20,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:35:20,893 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:35:20,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:35:20,905 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:35:20,905 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1521432066] [2020-11-07 06:35:20,906 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:35:20,906 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-11-07 06:35:20,906 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319812510] [2020-11-07 06:35:20,907 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-07 06:35:20,907 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:35:20,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-07 06:35:20,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-11-07 06:35:20,908 INFO L87 Difference]: Start difference. First operand 51 states and 54 transitions. Second operand 9 states. [2020-11-07 06:35:21,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:35:21,277 INFO L93 Difference]: Finished difference Result 71 states and 76 transitions. [2020-11-07 06:35:21,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-07 06:35:21,278 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 41 [2020-11-07 06:35:21,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:35:21,279 INFO L225 Difference]: With dead ends: 71 [2020-11-07 06:35:21,279 INFO L226 Difference]: Without dead ends: 47 [2020-11-07 06:35:21,280 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2020-11-07 06:35:21,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-11-07 06:35:21,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 44. [2020-11-07 06:35:21,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-11-07 06:35:21,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 45 transitions. [2020-11-07 06:35:21,293 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 45 transitions. Word has length 41 [2020-11-07 06:35:21,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:35:21,294 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 45 transitions. [2020-11-07 06:35:21,294 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-11-07 06:35:21,294 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 45 transitions. [2020-11-07 06:35:21,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-11-07 06:35:21,295 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:35:21,296 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:35:21,296 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-07 06:35:21,296 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:35:21,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:35:21,297 INFO L82 PathProgramCache]: Analyzing trace with hash 1714669679, now seen corresponding path program 2 times [2020-11-07 06:35:21,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:35:21,297 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1456018480] [2020-11-07 06:35:21,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:35:21,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:35:21,681 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:35:21,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:35:21,696 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:35:21,696 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1456018480] [2020-11-07 06:35:21,697 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:35:21,697 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-11-07 06:35:21,697 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843704131] [2020-11-07 06:35:21,698 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-07 06:35:21,698 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:35:21,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-07 06:35:21,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2020-11-07 06:35:21,699 INFO L87 Difference]: Start difference. First operand 44 states and 45 transitions. Second operand 15 states. [2020-11-07 06:35:22,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:35:22,988 INFO L93 Difference]: Finished difference Result 66 states and 68 transitions. [2020-11-07 06:35:22,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-11-07 06:35:22,989 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 42 [2020-11-07 06:35:22,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:35:22,991 INFO L225 Difference]: With dead ends: 66 [2020-11-07 06:35:22,991 INFO L226 Difference]: Without dead ends: 59 [2020-11-07 06:35:22,993 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=149, Invalid=721, Unknown=0, NotChecked=0, Total=870 [2020-11-07 06:35:22,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-11-07 06:35:23,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 52. [2020-11-07 06:35:23,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-11-07 06:35:23,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 53 transitions. [2020-11-07 06:35:23,009 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 53 transitions. Word has length 42 [2020-11-07 06:35:23,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:35:23,009 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 53 transitions. [2020-11-07 06:35:23,009 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-11-07 06:35:23,009 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 53 transitions. [2020-11-07 06:35:23,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-11-07 06:35:23,011 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:35:23,011 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:35:23,011 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-07 06:35:23,012 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:35:23,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:35:23,012 INFO L82 PathProgramCache]: Analyzing trace with hash 1101563205, now seen corresponding path program 2 times [2020-11-07 06:35:23,012 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:35:23,013 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [985128330] [2020-11-07 06:35:23,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:35:23,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:35:23,206 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:35:23,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:35:23,223 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 15 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:35:23,223 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [985128330] [2020-11-07 06:35:23,224 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:35:23,224 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-11-07 06:35:23,224 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040737892] [2020-11-07 06:35:23,225 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-11-07 06:35:23,225 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:35:23,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-11-07 06:35:23,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2020-11-07 06:35:23,231 INFO L87 Difference]: Start difference. First operand 52 states and 53 transitions. Second operand 13 states. [2020-11-07 06:35:24,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:35:24,046 INFO L93 Difference]: Finished difference Result 72 states and 75 transitions. [2020-11-07 06:35:24,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-11-07 06:35:24,047 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 50 [2020-11-07 06:35:24,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:35:24,048 INFO L225 Difference]: With dead ends: 72 [2020-11-07 06:35:24,048 INFO L226 Difference]: Without dead ends: 56 [2020-11-07 06:35:24,049 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=180, Invalid=522, Unknown=0, NotChecked=0, Total=702 [2020-11-07 06:35:24,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-11-07 06:35:24,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 53. [2020-11-07 06:35:24,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-11-07 06:35:24,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2020-11-07 06:35:24,076 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 50 [2020-11-07 06:35:24,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:35:24,077 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2020-11-07 06:35:24,078 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-11-07 06:35:24,078 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2020-11-07 06:35:24,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-11-07 06:35:24,085 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:35:24,086 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:35:24,086 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-11-07 06:35:24,086 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:35:24,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:35:24,087 INFO L82 PathProgramCache]: Analyzing trace with hash 787026407, now seen corresponding path program 3 times [2020-11-07 06:35:24,087 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:35:24,087 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1624329172] [2020-11-07 06:35:24,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:35:24,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:35:24,505 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:35:24,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:35:24,519 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-11-07 06:35:24,520 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1624329172] [2020-11-07 06:35:24,520 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:35:24,520 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-11-07 06:35:24,520 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882167862] [2020-11-07 06:35:24,521 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-07 06:35:24,521 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:35:24,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-07 06:35:24,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2020-11-07 06:35:24,523 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand 17 states. [2020-11-07 06:35:25,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:35:25,808 INFO L93 Difference]: Finished difference Result 74 states and 76 transitions. [2020-11-07 06:35:25,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-11-07 06:35:25,808 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 51 [2020-11-07 06:35:25,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:35:25,810 INFO L225 Difference]: With dead ends: 74 [2020-11-07 06:35:25,810 INFO L226 Difference]: Without dead ends: 67 [2020-11-07 06:35:25,811 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=148, Invalid=782, Unknown=0, NotChecked=0, Total=930 [2020-11-07 06:35:25,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-11-07 06:35:25,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 62. [2020-11-07 06:35:25,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-11-07 06:35:25,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 64 transitions. [2020-11-07 06:35:25,850 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 64 transitions. Word has length 51 [2020-11-07 06:35:25,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:35:25,850 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 64 transitions. [2020-11-07 06:35:25,850 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-11-07 06:35:25,851 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 64 transitions. [2020-11-07 06:35:25,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-11-07 06:35:25,852 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:35:25,852 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:35:25,852 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-11-07 06:35:25,852 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:35:25,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:35:25,853 INFO L82 PathProgramCache]: Analyzing trace with hash -1994860867, now seen corresponding path program 3 times [2020-11-07 06:35:25,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:35:25,853 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1472627775] [2020-11-07 06:35:25,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:35:25,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:35:26,116 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:35:26,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:35:26,129 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 22 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:35:26,130 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1472627775] [2020-11-07 06:35:26,130 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:35:26,130 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-11-07 06:35:26,130 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450537786] [2020-11-07 06:35:26,131 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-07 06:35:26,131 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:35:26,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-07 06:35:26,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-11-07 06:35:26,132 INFO L87 Difference]: Start difference. First operand 62 states and 64 transitions. Second operand 17 states. [2020-11-07 06:35:27,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:35:27,238 INFO L93 Difference]: Finished difference Result 90 states and 94 transitions. [2020-11-07 06:35:27,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-11-07 06:35:27,238 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 59 [2020-11-07 06:35:27,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:35:27,240 INFO L225 Difference]: With dead ends: 90 [2020-11-07 06:35:27,241 INFO L226 Difference]: Without dead ends: 74 [2020-11-07 06:35:27,244 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=323, Invalid=1009, Unknown=0, NotChecked=0, Total=1332 [2020-11-07 06:35:27,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-11-07 06:35:27,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 71. [2020-11-07 06:35:27,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-11-07 06:35:27,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 73 transitions. [2020-11-07 06:35:27,283 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 73 transitions. Word has length 59 [2020-11-07 06:35:27,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:35:27,285 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 73 transitions. [2020-11-07 06:35:27,285 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-11-07 06:35:27,285 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 73 transitions. [2020-11-07 06:35:27,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-11-07 06:35:27,288 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:35:27,288 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:35:27,288 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-11-07 06:35:27,289 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:35:27,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:35:27,289 INFO L82 PathProgramCache]: Analyzing trace with hash 1591782469, now seen corresponding path program 4 times [2020-11-07 06:35:27,290 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:35:27,291 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2015994316] [2020-11-07 06:35:27,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:35:27,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:35:27,727 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:35:27,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:35:27,742 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 29 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:35:27,742 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2015994316] [2020-11-07 06:35:27,743 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:35:27,743 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-11-07 06:35:27,743 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344564009] [2020-11-07 06:35:27,746 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-07 06:35:27,746 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:35:27,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-07 06:35:27,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2020-11-07 06:35:27,748 INFO L87 Difference]: Start difference. First operand 71 states and 73 transitions. Second operand 21 states. [2020-11-07 06:35:29,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:35:29,222 INFO L93 Difference]: Finished difference Result 98 states and 102 transitions. [2020-11-07 06:35:29,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-11-07 06:35:29,223 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 68 [2020-11-07 06:35:29,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:35:29,224 INFO L225 Difference]: With dead ends: 98 [2020-11-07 06:35:29,224 INFO L226 Difference]: Without dead ends: 82 [2020-11-07 06:35:29,226 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 463 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=508, Invalid=1654, Unknown=0, NotChecked=0, Total=2162 [2020-11-07 06:35:29,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-11-07 06:35:29,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 80. [2020-11-07 06:35:29,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-11-07 06:35:29,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 82 transitions. [2020-11-07 06:35:29,248 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 82 transitions. Word has length 68 [2020-11-07 06:35:29,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:35:29,249 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 82 transitions. [2020-11-07 06:35:29,249 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-11-07 06:35:29,249 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 82 transitions. [2020-11-07 06:35:29,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-11-07 06:35:29,250 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:35:29,250 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:35:29,250 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-11-07 06:35:29,250 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:35:29,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:35:29,251 INFO L82 PathProgramCache]: Analyzing trace with hash -82014275, now seen corresponding path program 5 times [2020-11-07 06:35:29,251 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:35:29,252 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1229607285] [2020-11-07 06:35:29,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:35:29,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-07 06:35:29,283 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-07 06:35:29,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-07 06:35:29,304 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-07 06:35:29,339 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-11-07 06:35:29,339 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-07 06:35:29,339 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-11-07 06:35:29,393 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.11 06:35:29 BoogieIcfgContainer [2020-11-07 06:35:29,394 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-07 06:35:29,396 INFO L168 Benchmark]: Toolchain (without parser) took 11862.49 ms. Allocated memory was 151.0 MB in the beginning and 232.8 MB in the end (delta: 81.8 MB). Free memory was 127.3 MB in the beginning and 177.7 MB in the end (delta: -50.4 MB). Peak memory consumption was 32.4 MB. Max. memory is 8.0 GB. [2020-11-07 06:35:29,397 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 151.0 MB. Free memory is still 127.0 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-11-07 06:35:29,398 INFO L168 Benchmark]: CACSL2BoogieTranslator took 253.88 ms. Allocated memory is still 151.0 MB. Free memory was 126.7 MB in the beginning and 117.5 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-11-07 06:35:29,399 INFO L168 Benchmark]: Boogie Preprocessor took 36.06 ms. Allocated memory is still 151.0 MB. Free memory was 117.5 MB in the beginning and 116.0 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-11-07 06:35:29,399 INFO L168 Benchmark]: RCFGBuilder took 576.70 ms. Allocated memory is still 151.0 MB. Free memory was 116.0 MB in the beginning and 101.5 MB in the end (delta: 14.5 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. [2020-11-07 06:35:29,400 INFO L168 Benchmark]: TraceAbstraction took 10983.68 ms. Allocated memory was 151.0 MB in the beginning and 232.8 MB in the end (delta: 81.8 MB). Free memory was 101.1 MB in the beginning and 177.7 MB in the end (delta: -76.6 MB). Peak memory consumption was 6.2 MB. Max. memory is 8.0 GB. [2020-11-07 06:35:29,404 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 151.0 MB. Free memory is still 127.0 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 253.88 ms. Allocated memory is still 151.0 MB. Free memory was 126.7 MB in the beginning and 117.5 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 36.06 ms. Allocated memory is still 151.0 MB. Free memory was 117.5 MB in the beginning and 116.0 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 576.70 ms. Allocated memory is still 151.0 MB. Free memory was 116.0 MB in the beginning and 101.5 MB in the end (delta: 14.5 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 10983.68 ms. Allocated memory was 151.0 MB in the beginning and 232.8 MB in the end (delta: 81.8 MB). Free memory was 101.1 MB in the beginning and 177.7 MB in the end (delta: -76.6 MB). Peak memory consumption was 6.2 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 12]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L23] int i, j=10, n=__VERIFIER_nondet_uint(), sn=0; VAL [__VERIFIER_nondet_uint()=6, j=10, n=6] [L23] int i, j=10, n=__VERIFIER_nondet_uint(), sn=0; VAL [j=10, n=6, n=0] [L24] i=1 VAL [i=1, j=10, n=0, n=6] [L24] COND TRUE i<=n VAL [i=1, j=10, n=6, n=0] [L25] COND TRUE i