/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/loop-invgen/nested6.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-72570d3 [2020-08-22 19:47:44,822 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 19:47:44,827 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 19:47:44,871 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-22 19:47:44,871 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-22 19:47:44,880 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-22 19:47:44,881 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-22 19:47:44,884 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-22 19:47:44,887 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-22 19:47:44,890 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-22 19:47:44,890 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-22 19:47:44,892 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-22 19:47:44,892 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 19:47:44,896 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 19:47:44,899 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 19:47:44,901 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 19:47:44,903 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 19:47:44,904 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 19:47:44,906 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 19:47:44,916 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 19:47:44,917 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 19:47:44,918 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 19:47:44,919 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 19:47:44,920 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 19:47:44,933 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-22 19:47:44,949 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 19:47:44,950 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 19:47:44,955 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 19:47:44,957 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-08-22 19:47:44,975 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 19:47:44,976 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 19:47:44,977 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 19:47:44,977 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 19:47:44,978 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 19:47:44,978 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 19:47:44,978 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 19:47:44,978 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 19:47:44,978 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 19:47:44,978 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 19:47:44,979 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 19:47:44,980 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 19:47:44,980 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 19:47:44,980 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 19:47:44,981 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 19:47:44,981 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-08-22 19:47:44,981 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 19:47:44,981 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 19:47:44,981 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 19:47:44,982 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 19:47:44,982 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-08-22 19:47:44,982 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 19:47:44,983 INFO L138 SettingsManager]: * Use separate solver for trace checks=false [2020-08-22 19:47:45,263 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 19:47:45,275 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 19:47:45,279 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 19:47:45,280 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 19:47:45,281 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 19:47:45,281 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invgen/nested6.i [2020-08-22 19:47:45,350 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ea4819b07/d35bb8afffc14051be404199c6e45bba/FLAGc392c3c88 [2020-08-22 19:47:45,876 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 19:47:45,877 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/nested6.i [2020-08-22 19:47:45,886 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ea4819b07/d35bb8afffc14051be404199c6e45bba/FLAGc392c3c88 [2020-08-22 19:47:46,203 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ea4819b07/d35bb8afffc14051be404199c6e45bba [2020-08-22 19:47:46,214 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 19:47:46,217 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 19:47:46,218 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 19:47:46,218 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 19:47:46,222 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 19:47:46,223 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 07:47:46" (1/1) ... [2020-08-22 19:47:46,228 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4fe06944 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:47:46, skipping insertion in model container [2020-08-22 19:47:46,229 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 07:47:46" (1/1) ... [2020-08-22 19:47:46,239 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 19:47:46,265 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 19:47:46,478 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 19:47:46,483 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 19:47:46,504 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 19:47:46,521 INFO L208 MainTranslator]: Completed translation [2020-08-22 19:47:46,522 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:47:46 WrapperNode [2020-08-22 19:47:46,522 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 19:47:46,523 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 19:47:46,524 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 19:47:46,524 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 19:47:46,540 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:47:46" (1/1) ... [2020-08-22 19:47:46,540 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:47:46" (1/1) ... [2020-08-22 19:47:46,547 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:47:46" (1/1) ... [2020-08-22 19:47:46,548 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:47:46" (1/1) ... [2020-08-22 19:47:46,552 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:47:46" (1/1) ... [2020-08-22 19:47:46,650 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:47:46" (1/1) ... [2020-08-22 19:47:46,652 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:47:46" (1/1) ... [2020-08-22 19:47:46,656 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 19:47:46,657 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 19:47:46,661 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 19:47:46,661 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 19:47:46,663 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:47:46" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 19:47:46,733 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 19:47:46,733 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 19:47:46,733 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-08-22 19:47:46,733 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-22 19:47:46,733 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 19:47:46,733 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 19:47:46,734 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-22 19:47:46,734 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-08-22 19:47:46,734 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-22 19:47:46,734 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-22 19:47:46,734 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 19:47:46,734 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 19:47:46,734 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 19:47:46,996 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 19:47:46,996 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-08-22 19:47:47,002 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 07:47:47 BoogieIcfgContainer [2020-08-22 19:47:47,002 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 19:47:47,004 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 19:47:47,004 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 19:47:47,008 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 19:47:47,008 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 07:47:46" (1/3) ... [2020-08-22 19:47:47,010 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a362e5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 07:47:47, skipping insertion in model container [2020-08-22 19:47:47,010 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:47:46" (2/3) ... [2020-08-22 19:47:47,011 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a362e5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 07:47:47, skipping insertion in model container [2020-08-22 19:47:47,011 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 07:47:47" (3/3) ... [2020-08-22 19:47:47,013 INFO L109 eAbstractionObserver]: Analyzing ICFG nested6.i [2020-08-22 19:47:47,026 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-22 19:47:47,040 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 19:47:47,058 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 19:47:47,088 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 19:47:47,088 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 19:47:47,089 INFO L377 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-08-22 19:47:47,089 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 19:47:47,089 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 19:47:47,089 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 19:47:47,090 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 19:47:47,090 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 19:47:47,124 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states. [2020-08-22 19:47:47,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-22 19:47:47,155 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:47:47,159 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] [2020-08-22 19:47:47,160 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:47:47,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:47:47,169 INFO L82 PathProgramCache]: Analyzing trace with hash 2127483765, now seen corresponding path program 1 times [2020-08-22 19:47:47,178 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:47:47,193 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1052747480] [2020-08-22 19:47:47,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:47:47,255 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:47:47,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:47,436 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:47:47,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:47,447 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:47:47,453 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1052747480] [2020-08-22 19:47:47,456 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:47:47,457 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-22 19:47:47,458 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636652708] [2020-08-22 19:47:47,466 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 19:47:47,467 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:47:47,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 19:47:47,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-22 19:47:47,488 INFO L87 Difference]: Start difference. First operand 50 states. Second operand 5 states. [2020-08-22 19:47:47,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:47:47,672 INFO L93 Difference]: Finished difference Result 89 states and 112 transitions. [2020-08-22 19:47:47,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-22 19:47:47,675 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 27 [2020-08-22 19:47:47,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:47:47,692 INFO L225 Difference]: With dead ends: 89 [2020-08-22 19:47:47,693 INFO L226 Difference]: Without dead ends: 48 [2020-08-22 19:47:47,698 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-22 19:47:47,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-08-22 19:47:47,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2020-08-22 19:47:47,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-08-22 19:47:47,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 52 transitions. [2020-08-22 19:47:47,756 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 52 transitions. Word has length 27 [2020-08-22 19:47:47,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:47:47,757 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 52 transitions. [2020-08-22 19:47:47,757 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 19:47:47,757 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 52 transitions. [2020-08-22 19:47:47,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-08-22 19:47:47,759 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:47:47,759 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] [2020-08-22 19:47:47,760 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 19:47:47,760 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:47:47,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:47:47,761 INFO L82 PathProgramCache]: Analyzing trace with hash 1763359327, now seen corresponding path program 1 times [2020-08-22 19:47:47,761 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:47:47,762 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [98999609] [2020-08-22 19:47:47,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:47:47,764 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:47:47,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:47,864 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:47:47,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:47,874 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:47:47,875 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [98999609] [2020-08-22 19:47:47,876 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:47:47,876 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-22 19:47:47,876 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294918014] [2020-08-22 19:47:47,878 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-22 19:47:47,879 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:47:47,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-22 19:47:47,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-22 19:47:47,880 INFO L87 Difference]: Start difference. First operand 48 states and 52 transitions. Second operand 6 states. [2020-08-22 19:47:48,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:47:48,126 INFO L93 Difference]: Finished difference Result 90 states and 105 transitions. [2020-08-22 19:47:48,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-22 19:47:48,127 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 29 [2020-08-22 19:47:48,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:47:48,130 INFO L225 Difference]: With dead ends: 90 [2020-08-22 19:47:48,131 INFO L226 Difference]: Without dead ends: 88 [2020-08-22 19:47:48,134 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-08-22 19:47:48,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-08-22 19:47:48,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 59. [2020-08-22 19:47:48,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-08-22 19:47:48,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 66 transitions. [2020-08-22 19:47:48,158 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 66 transitions. Word has length 29 [2020-08-22 19:47:48,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:47:48,158 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 66 transitions. [2020-08-22 19:47:48,159 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-22 19:47:48,159 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 66 transitions. [2020-08-22 19:47:48,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-08-22 19:47:48,160 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:47:48,161 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1] [2020-08-22 19:47:48,161 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 19:47:48,161 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:47:48,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:47:48,162 INFO L82 PathProgramCache]: Analyzing trace with hash 2139784298, now seen corresponding path program 1 times [2020-08-22 19:47:48,162 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:47:48,163 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [645031056] [2020-08-22 19:47:48,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:47:48,165 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:47:48,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:48,279 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:47:48,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:48,283 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-22 19:47:48,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:48,310 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:47:48,311 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [645031056] [2020-08-22 19:47:48,311 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:47:48,311 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-22 19:47:48,317 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220988995] [2020-08-22 19:47:48,317 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 19:47:48,318 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:47:48,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 19:47:48,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-22 19:47:48,319 INFO L87 Difference]: Start difference. First operand 59 states and 66 transitions. Second operand 5 states. [2020-08-22 19:47:48,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:47:48,455 INFO L93 Difference]: Finished difference Result 86 states and 98 transitions. [2020-08-22 19:47:48,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-22 19:47:48,455 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 32 [2020-08-22 19:47:48,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:47:48,459 INFO L225 Difference]: With dead ends: 86 [2020-08-22 19:47:48,459 INFO L226 Difference]: Without dead ends: 84 [2020-08-22 19:47:48,460 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-22 19:47:48,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-08-22 19:47:48,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 80. [2020-08-22 19:47:48,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-08-22 19:47:48,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 92 transitions. [2020-08-22 19:47:48,494 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 92 transitions. Word has length 32 [2020-08-22 19:47:48,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:47:48,495 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 92 transitions. [2020-08-22 19:47:48,501 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 19:47:48,501 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 92 transitions. [2020-08-22 19:47:48,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-08-22 19:47:48,503 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:47:48,503 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:47:48,504 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-22 19:47:48,504 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:47:48,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:47:48,504 INFO L82 PathProgramCache]: Analyzing trace with hash -268568898, now seen corresponding path program 1 times [2020-08-22 19:47:48,505 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:47:48,505 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [660260343] [2020-08-22 19:47:48,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:47:48,538 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:47:48,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:48,620 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:47:48,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:48,622 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-08-22 19:47:48,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:48,630 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:47:48,631 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [660260343] [2020-08-22 19:47:48,631 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:47:48,631 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-22 19:47:48,631 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371517993] [2020-08-22 19:47:48,632 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-22 19:47:48,632 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:47:48,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-22 19:47:48,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-08-22 19:47:48,633 INFO L87 Difference]: Start difference. First operand 80 states and 92 transitions. Second operand 8 states. [2020-08-22 19:47:48,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:47:48,908 INFO L93 Difference]: Finished difference Result 137 states and 162 transitions. [2020-08-22 19:47:48,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-22 19:47:48,909 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 38 [2020-08-22 19:47:48,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:47:48,913 INFO L225 Difference]: With dead ends: 137 [2020-08-22 19:47:48,913 INFO L226 Difference]: Without dead ends: 135 [2020-08-22 19:47:48,914 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2020-08-22 19:47:48,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-08-22 19:47:48,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 83. [2020-08-22 19:47:48,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-08-22 19:47:48,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 95 transitions. [2020-08-22 19:47:48,937 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 95 transitions. Word has length 38 [2020-08-22 19:47:48,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:47:48,937 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 95 transitions. [2020-08-22 19:47:48,938 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-22 19:47:48,939 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 95 transitions. [2020-08-22 19:47:48,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-08-22 19:47:48,941 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:47:48,942 INFO L422 BasicCegarLoop]: trace histogram [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, 1] [2020-08-22 19:47:48,942 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-22 19:47:48,942 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:47:48,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:47:48,944 INFO L82 PathProgramCache]: Analyzing trace with hash -360550748, now seen corresponding path program 1 times [2020-08-22 19:47:48,944 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:47:48,945 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [544689840] [2020-08-22 19:47:48,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:47:48,958 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:47:48,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:49,049 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:47:49,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:49,055 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:47:49,058 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [544689840] [2020-08-22 19:47:49,058 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:47:49,058 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-22 19:47:49,059 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257617112] [2020-08-22 19:47:49,059 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-22 19:47:49,060 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:47:49,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-22 19:47:49,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-22 19:47:49,060 INFO L87 Difference]: Start difference. First operand 83 states and 95 transitions. Second operand 6 states. [2020-08-22 19:47:49,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:47:49,233 INFO L93 Difference]: Finished difference Result 194 states and 236 transitions. [2020-08-22 19:47:49,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-22 19:47:49,234 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 38 [2020-08-22 19:47:49,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:47:49,236 INFO L225 Difference]: With dead ends: 194 [2020-08-22 19:47:49,241 INFO L226 Difference]: Without dead ends: 128 [2020-08-22 19:47:49,242 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-08-22 19:47:49,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-08-22 19:47:49,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 88. [2020-08-22 19:47:49,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-08-22 19:47:49,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 100 transitions. [2020-08-22 19:47:49,280 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 100 transitions. Word has length 38 [2020-08-22 19:47:49,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:47:49,281 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 100 transitions. [2020-08-22 19:47:49,281 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-22 19:47:49,281 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 100 transitions. [2020-08-22 19:47:49,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-08-22 19:47:49,290 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:47:49,290 INFO L422 BasicCegarLoop]: trace histogram [3, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:47:49,294 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-22 19:47:49,294 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:47:49,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:47:49,295 INFO L82 PathProgramCache]: Analyzing trace with hash 1447898534, now seen corresponding path program 1 times [2020-08-22 19:47:49,295 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:47:49,295 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [500407621] [2020-08-22 19:47:49,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:47:49,305 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:47:49,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:49,474 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:47:49,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:49,477 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-22 19:47:49,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:49,487 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-22 19:47:49,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:49,505 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:47:49,506 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [500407621] [2020-08-22 19:47:49,507 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:47:49,508 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-22 19:47:49,508 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149707049] [2020-08-22 19:47:49,509 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-22 19:47:49,510 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:47:49,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-22 19:47:49,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-08-22 19:47:49,511 INFO L87 Difference]: Start difference. First operand 88 states and 100 transitions. Second operand 8 states. [2020-08-22 19:47:49,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:47:49,766 INFO L93 Difference]: Finished difference Result 111 states and 127 transitions. [2020-08-22 19:47:49,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-22 19:47:49,767 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 46 [2020-08-22 19:47:49,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:47:49,776 INFO L225 Difference]: With dead ends: 111 [2020-08-22 19:47:49,777 INFO L226 Difference]: Without dead ends: 109 [2020-08-22 19:47:49,778 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-08-22 19:47:49,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-08-22 19:47:49,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 93. [2020-08-22 19:47:49,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-08-22 19:47:49,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 105 transitions. [2020-08-22 19:47:49,817 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 105 transitions. Word has length 46 [2020-08-22 19:47:49,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:47:49,818 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 105 transitions. [2020-08-22 19:47:49,818 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-22 19:47:49,818 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 105 transitions. [2020-08-22 19:47:49,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-08-22 19:47:49,822 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:47:49,822 INFO L422 BasicCegarLoop]: trace histogram [3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:47:49,823 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-22 19:47:49,823 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:47:49,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:47:49,823 INFO L82 PathProgramCache]: Analyzing trace with hash 87970788, now seen corresponding path program 1 times [2020-08-22 19:47:49,824 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:47:49,824 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [113656234] [2020-08-22 19:47:49,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:47:49,834 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:47:49,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:49,992 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:47:49,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:49,994 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-08-22 19:47:49,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:50,000 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-08-22 19:47:50,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:50,008 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:47:50,008 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [113656234] [2020-08-22 19:47:50,009 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:47:50,009 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-08-22 19:47:50,009 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47427287] [2020-08-22 19:47:50,010 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-22 19:47:50,010 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:47:50,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-22 19:47:50,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-08-22 19:47:50,011 INFO L87 Difference]: Start difference. First operand 93 states and 105 transitions. Second operand 10 states. [2020-08-22 19:47:50,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:47:50,339 INFO L93 Difference]: Finished difference Result 140 states and 165 transitions. [2020-08-22 19:47:50,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-22 19:47:50,340 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 50 [2020-08-22 19:47:50,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:47:50,342 INFO L225 Difference]: With dead ends: 140 [2020-08-22 19:47:50,342 INFO L226 Difference]: Without dead ends: 138 [2020-08-22 19:47:50,344 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=107, Invalid=313, Unknown=0, NotChecked=0, Total=420 [2020-08-22 19:47:50,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-08-22 19:47:50,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 76. [2020-08-22 19:47:50,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-08-22 19:47:50,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 82 transitions. [2020-08-22 19:47:50,361 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 82 transitions. Word has length 50 [2020-08-22 19:47:50,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:47:50,361 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 82 transitions. [2020-08-22 19:47:50,361 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-22 19:47:50,362 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 82 transitions. [2020-08-22 19:47:50,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-08-22 19:47:50,362 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:47:50,363 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:47:50,363 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-22 19:47:50,363 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:47:50,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:47:50,364 INFO L82 PathProgramCache]: Analyzing trace with hash 2033926999, now seen corresponding path program 1 times [2020-08-22 19:47:50,364 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:47:50,364 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [909327103] [2020-08-22 19:47:50,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:47:50,369 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:47:50,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:50,470 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:47:50,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:50,472 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-22 19:47:50,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:50,477 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-22 19:47:50,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:50,489 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-08-22 19:47:50,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:50,501 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:47:50,501 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [909327103] [2020-08-22 19:47:50,502 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:47:50,502 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-08-22 19:47:50,502 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091652175] [2020-08-22 19:47:50,503 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-22 19:47:50,503 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:47:50,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-22 19:47:50,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-08-22 19:47:50,504 INFO L87 Difference]: Start difference. First operand 76 states and 82 transitions. Second operand 10 states. [2020-08-22 19:47:50,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:47:50,855 INFO L93 Difference]: Finished difference Result 98 states and 110 transitions. [2020-08-22 19:47:50,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-22 19:47:50,856 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 55 [2020-08-22 19:47:50,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:47:50,858 INFO L225 Difference]: With dead ends: 98 [2020-08-22 19:47:50,858 INFO L226 Difference]: Without dead ends: 0 [2020-08-22 19:47:50,860 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2020-08-22 19:47:50,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-22 19:47:50,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-22 19:47:50,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-22 19:47:50,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-22 19:47:50,861 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 55 [2020-08-22 19:47:50,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:47:50,861 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-22 19:47:50,861 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-22 19:47:50,861 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-22 19:47:50,862 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-22 19:47:50,863 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-22 19:47:50,866 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-22 19:47:52,249 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-08-22 19:47:52,249 INFO L271 CegarLoopResult]: At program point ULTIMATE.initEXIT(line -1) the Hoare annotation is: true [2020-08-22 19:47:52,250 INFO L271 CegarLoopResult]: At program point ULTIMATE.startEXIT(line -1) the Hoare annotation is: true [2020-08-22 19:47:52,250 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-22 19:47:52,250 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-22 19:47:52,250 INFO L271 CegarLoopResult]: At program point ULTIMATE.startFINAL(line -1) the Hoare annotation is: true [2020-08-22 19:47:52,250 INFO L268 CegarLoopResult]: For program point L4-3(lines 3 5) no Hoare annotation was computed. [2020-08-22 19:47:52,251 INFO L268 CegarLoopResult]: For program point assume_abort_if_notENTRY(lines 3 5) no Hoare annotation was computed. [2020-08-22 19:47:52,251 INFO L268 CegarLoopResult]: For program point L4(line 4) no Hoare annotation was computed. [2020-08-22 19:47:52,251 INFO L268 CegarLoopResult]: For program point L4-1(line 4) no Hoare annotation was computed. [2020-08-22 19:47:52,251 INFO L268 CegarLoopResult]: For program point assume_abort_if_notEXIT(lines 3 5) no Hoare annotation was computed. [2020-08-22 19:47:52,251 INFO L264 CegarLoopResult]: At program point L31(lines 23 33) the Hoare annotation is: (and (<= (* 2 main_~i~0) main_~j~0) (<= main_~n~0 main_~k~0) (<= (+ main_~j~0 1) main_~n~0) (<= main_~k~0 main_~n~0)) [2020-08-22 19:47:52,252 INFO L271 CegarLoopResult]: At program point mainEXIT(lines 13 37) the Hoare annotation is: true [2020-08-22 19:47:52,252 INFO L264 CegarLoopResult]: At program point L23(line 23) the Hoare annotation is: (and (<= main_~n~0 main_~k~0) (<= main_~k~0 main_~n~0)) [2020-08-22 19:47:52,254 INFO L264 CegarLoopResult]: At program point L23-3(line 23) the Hoare annotation is: (let ((.cse0 (* 2 main_~i~0))) (and (<= .cse0 main_~j~0) (<= .cse0 |main_#t~post3|) (<= (+ main_~j~0 1) main_~n~0) (<= main_~n~0 main_~k~0) (<= main_~k~0 main_~n~0))) [2020-08-22 19:47:52,257 INFO L264 CegarLoopResult]: At program point L23-4(line 23) the Hoare annotation is: (let ((.cse0 (* 2 main_~i~0))) (and (<= (+ .cse0 1) main_~j~0) (<= main_~n~0 main_~k~0) (<= .cse0 |main_#t~post3|) (<= main_~k~0 main_~n~0))) [2020-08-22 19:47:52,257 INFO L264 CegarLoopResult]: At program point L23-5(lines 23 33) the Hoare annotation is: (and (<= (* 2 main_~i~0) main_~j~0) (<= main_~n~0 main_~k~0) (<= main_~k~0 main_~n~0)) [2020-08-22 19:47:52,257 INFO L271 CegarLoopResult]: At program point L15(line 15) the Hoare annotation is: true [2020-08-22 19:47:52,257 INFO L271 CegarLoopResult]: At program point L15-1(line 15) the Hoare annotation is: true [2020-08-22 19:47:52,258 INFO L271 CegarLoopResult]: At program point L15-2(line 15) the Hoare annotation is: true [2020-08-22 19:47:52,260 INFO L264 CegarLoopResult]: At program point L24(line 24) the Hoare annotation is: (and (<= (* 2 main_~i~0) main_~j~0) (<= (+ main_~j~0 1) main_~n~0) (<= main_~n~0 main_~k~0) (<= main_~k~0 main_~n~0)) [2020-08-22 19:47:52,261 INFO L264 CegarLoopResult]: At program point L24-1(lines 24 32) the Hoare annotation is: (and (<= (* 2 main_~i~0) main_~j~0) (<= (+ main_~j~0 1) main_~n~0) (<= main_~n~0 main_~k~0) (<= main_~k~0 main_~n~0)) [2020-08-22 19:47:52,261 INFO L264 CegarLoopResult]: At program point L24-2(line 24) the Hoare annotation is: (and (<= (* 2 main_~i~0) main_~j~0) (<= (+ main_~j~0 1) main_~n~0) (<= main_~n~0 main_~k~0) (<= main_~k~0 main_~n~0)) [2020-08-22 19:47:52,261 INFO L264 CegarLoopResult]: At program point L24-3(line 24) the Hoare annotation is: (and (<= (* 2 main_~i~0) main_~j~0) (<= main_~n~0 main_~k~0) (<= (+ main_~j~0 1) main_~n~0) (<= main_~k~0 main_~n~0)) [2020-08-22 19:47:52,261 INFO L271 CegarLoopResult]: At program point L16(line 16) the Hoare annotation is: true [2020-08-22 19:47:52,261 INFO L271 CegarLoopResult]: At program point L16-1(line 16) the Hoare annotation is: true [2020-08-22 19:47:52,261 INFO L271 CegarLoopResult]: At program point L16-2(line 16) the Hoare annotation is: true [2020-08-22 19:47:52,263 INFO L264 CegarLoopResult]: At program point L25(line 25) the Hoare annotation is: (and (<= (* 2 main_~i~0) main_~j~0) (<= (+ main_~j~0 1) main_~n~0) (<= main_~n~0 main_~k~0) (<= main_~k~0 main_~n~0)) [2020-08-22 19:47:52,263 INFO L264 CegarLoopResult]: At program point L25-3(line 25) the Hoare annotation is: (let ((.cse0 (* 2 main_~i~0))) (and (<= .cse0 main_~j~0) (<= .cse0 main_~k~0) (<= (+ main_~k~0 1) main_~n~0) (<= (+ |main_#t~post5| 1) main_~n~0) (<= (+ main_~j~0 1) main_~n~0) (<= .cse0 |main_#t~post5|))) [2020-08-22 19:47:52,264 INFO L264 CegarLoopResult]: At program point L25-4(line 25) the Hoare annotation is: (let ((.cse0 (* 2 main_~i~0))) (and (<= .cse0 main_~j~0) (<= (+ |main_#t~post5| 1) main_~n~0) (<= (+ main_~j~0 1) main_~n~0) (<= (+ .cse0 1) main_~k~0) (<= main_~k~0 main_~n~0) (<= .cse0 |main_#t~post5|))) [2020-08-22 19:47:52,264 INFO L264 CegarLoopResult]: At program point L25-5(lines 25 27) the Hoare annotation is: (let ((.cse0 (* 2 main_~i~0))) (and (<= .cse0 main_~j~0) (<= .cse0 main_~k~0) (<= (+ main_~j~0 1) main_~n~0) (<= main_~k~0 main_~n~0))) [2020-08-22 19:47:52,264 INFO L271 CegarLoopResult]: At program point L17(line 17) the Hoare annotation is: true [2020-08-22 19:47:52,264 INFO L271 CegarLoopResult]: At program point L17-1(line 17) the Hoare annotation is: true [2020-08-22 19:47:52,264 INFO L271 CegarLoopResult]: At program point mainFINAL(lines 13 37) the Hoare annotation is: true [2020-08-22 19:47:52,265 INFO L264 CegarLoopResult]: At program point L30(line 30) the Hoare annotation is: (and (<= (* 2 main_~i~0) main_~j~0) (<= main_~n~0 main_~k~0) (<= (+ main_~j~0 1) main_~n~0) (<= main_~k~0 main_~n~0)) [2020-08-22 19:47:52,265 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 13 37) the Hoare annotation is: true [2020-08-22 19:47:52,265 INFO L264 CegarLoopResult]: At program point L30-1(line 30) the Hoare annotation is: (and (<= (* 2 main_~i~0) main_~j~0) (<= main_~n~0 main_~k~0) (<= (+ main_~j~0 1) main_~n~0) (<= main_~k~0 main_~n~0)) [2020-08-22 19:47:52,265 INFO L264 CegarLoopResult]: At program point L26(line 26) the Hoare annotation is: (let ((.cse0 (* 2 main_~i~0))) (and (<= .cse0 main_~j~0) (<= .cse0 main_~k~0) (<= (+ main_~k~0 1) main_~n~0) (<= (+ main_~j~0 1) main_~n~0))) [2020-08-22 19:47:52,266 INFO L264 CegarLoopResult]: At program point L26-1(lines 25 27) the Hoare annotation is: (let ((.cse0 (* 2 main_~i~0))) (and (<= .cse0 main_~j~0) (<= .cse0 main_~k~0) (<= (+ main_~k~0 1) main_~n~0) (<= (+ main_~j~0 1) main_~n~0))) [2020-08-22 19:47:52,266 INFO L264 CegarLoopResult]: At program point L22-2(lines 22 34) the Hoare annotation is: (and (<= (* 2 main_~i~0) main_~j~0) (<= main_~n~0 main_~k~0) (<= main_~k~0 main_~n~0)) [2020-08-22 19:47:52,266 INFO L264 CegarLoopResult]: At program point L22-3(line 22) the Hoare annotation is: (and (<= (* 2 main_~i~0) main_~j~0) (<= main_~n~0 main_~k~0) (<= main_~k~0 main_~n~0)) [2020-08-22 19:47:52,266 INFO L271 CegarLoopResult]: At program point L18(lines 18 21) the Hoare annotation is: true [2020-08-22 19:47:52,266 INFO L264 CegarLoopResult]: At program point L22-4(line 22) the Hoare annotation is: (and (<= main_~n~0 main_~k~0) (<= main_~k~0 main_~n~0)) [2020-08-22 19:47:52,266 INFO L264 CegarLoopResult]: At program point L18-1(lines 18 21) the Hoare annotation is: (and (<= main_~n~0 main_~k~0) (<= main_~k~0 main_~n~0)) [2020-08-22 19:47:52,267 INFO L264 CegarLoopResult]: At program point L22-5(lines 22 34) the Hoare annotation is: (and (<= main_~n~0 main_~k~0) (<= main_~k~0 main_~n~0)) [2020-08-22 19:47:52,267 INFO L271 CegarLoopResult]: At program point L14(line 14) the Hoare annotation is: true [2020-08-22 19:47:52,267 INFO L271 CegarLoopResult]: At program point L14-1(line 14) the Hoare annotation is: true [2020-08-22 19:47:52,267 INFO L271 CegarLoopResult]: At program point L14-2(line 14) the Hoare annotation is: true [2020-08-22 19:47:52,267 INFO L271 CegarLoopResult]: At program point L35(lines 13 37) the Hoare annotation is: true [2020-08-22 19:47:52,268 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 6 11) the Hoare annotation is: true [2020-08-22 19:47:52,268 INFO L264 CegarLoopResult]: At program point __VERIFIER_assertEXIT(lines 6 11) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| 0) (not (= __VERIFIER_assert_~cond 0))) [2020-08-22 19:47:52,268 INFO L264 CegarLoopResult]: At program point L8(line 8) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2020-08-22 19:47:52,268 INFO L264 CegarLoopResult]: At program point L7(lines 7 9) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| 0) (not (= __VERIFIER_assert_~cond 0))) [2020-08-22 19:47:52,268 INFO L264 CegarLoopResult]: At program point L7-2(lines 6 11) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| 0) (not (= __VERIFIER_assert_~cond 0))) [2020-08-22 19:47:52,268 INFO L264 CegarLoopResult]: At program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 8) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2020-08-22 19:47:52,297 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.08 07:47:52 BoogieIcfgContainer [2020-08-22 19:47:52,297 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-22 19:47:52,308 INFO L168 Benchmark]: Toolchain (without parser) took 6083.10 ms. Allocated memory was 147.8 MB in the beginning and 271.1 MB in the end (delta: 123.2 MB). Free memory was 105.7 MB in the beginning and 118.9 MB in the end (delta: -13.2 MB). Peak memory consumption was 110.0 MB. Max. memory is 7.1 GB. [2020-08-22 19:47:52,309 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 147.8 MB. Free memory was 123.5 MB in the beginning and 123.3 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. [2020-08-22 19:47:52,311 INFO L168 Benchmark]: CACSL2BoogieTranslator took 304.94 ms. Allocated memory is still 147.8 MB. Free memory was 105.4 MB in the beginning and 95.9 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. [2020-08-22 19:47:52,312 INFO L168 Benchmark]: Boogie Preprocessor took 132.90 ms. Allocated memory was 147.8 MB in the beginning and 205.5 MB in the end (delta: 57.7 MB). Free memory was 95.9 MB in the beginning and 184.3 MB in the end (delta: -88.4 MB). Peak memory consumption was 10.7 MB. Max. memory is 7.1 GB. [2020-08-22 19:47:52,313 INFO L168 Benchmark]: RCFGBuilder took 345.93 ms. Allocated memory is still 205.5 MB. Free memory was 184.3 MB in the beginning and 168.0 MB in the end (delta: 16.3 MB). Peak memory consumption was 16.3 MB. Max. memory is 7.1 GB. [2020-08-22 19:47:52,316 INFO L168 Benchmark]: TraceAbstraction took 5293.21 ms. Allocated memory was 205.5 MB in the beginning and 271.1 MB in the end (delta: 65.5 MB). Free memory was 167.3 MB in the beginning and 118.9 MB in the end (delta: 48.4 MB). Peak memory consumption was 114.0 MB. Max. memory is 7.1 GB. [2020-08-22 19:47:52,330 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 147.8 MB. Free memory was 123.5 MB in the beginning and 123.3 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 304.94 ms. Allocated memory is still 147.8 MB. Free memory was 105.4 MB in the beginning and 95.9 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 132.90 ms. Allocated memory was 147.8 MB in the beginning and 205.5 MB in the end (delta: 57.7 MB). Free memory was 95.9 MB in the beginning and 184.3 MB in the end (delta: -88.4 MB). Peak memory consumption was 10.7 MB. Max. memory is 7.1 GB. * RCFGBuilder took 345.93 ms. Allocated memory is still 205.5 MB. Free memory was 184.3 MB in the beginning and 168.0 MB in the end (delta: 16.3 MB). Peak memory consumption was 16.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 5293.21 ms. Allocated memory was 205.5 MB in the beginning and 271.1 MB in the end (delta: 65.5 MB). Free memory was 167.3 MB in the beginning and 118.9 MB in the end (delta: 48.4 MB). Peak memory consumption was 114.0 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 8]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 22]: Loop Invariant Derived loop invariant: n <= k && k <= n - InvariantResult [Line: 23]: Loop Invariant Derived loop invariant: (2 * i <= j && n <= k) && k <= n - InvariantResult [Line: 13]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 25]: Loop Invariant Derived loop invariant: ((2 * i <= j && 2 * i <= k) && j + 1 <= n) && k <= n - ProcedureContractResult [Line: 13]: Procedure Contract for main Derived contract for procedure main: 1 - ProcedureContractResult [Line: 6]: Procedure Contract for __VERIFIER_assert Derived contract for procedure __VERIFIER_assert: \old(cond) == 0 || !(cond == 0) - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 55 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 3.7s, OverallIterations: 8, TraceHistogramMax: 4, AutomataDifference: 2.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 1.3s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 437 SDtfs, 335 SDslu, 1624 SDs, 0 SdLazy, 876 SolverSat, 90 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 128 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=93occurred in iteration=6, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 8 MinimizatonAttempts, 203 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 50 LocationsWithAnnotation, 152 PreInvPairs, 237 NumberOfFragments, 417 HoareAnnotationTreeSize, 152 FomulaSimplifications, 48247 FormulaSimplificationTreeSizeReduction, 0.4s HoareSimplificationTime, 50 FomulaSimplificationsInter, 3328 FormulaSimplificationTreeSizeReductionInter, 0.8s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: No data available, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...