/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.use.separate.solver.for.trace.checks true -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/loop-lit/cggmp2005.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-72570d3 [2020-08-22 23:05:14,830 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 23:05:14,833 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 23:05:14,873 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-08-22 23:05:14,902 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 23:05:14,906 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 23:05:14,907 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 23:05:14,910 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 23:05:14,911 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 23:05:14,912 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 23:05:14,919 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 23:05:14,923 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 23:05:14,927 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 23:05:14,929 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 23:05:14,931 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 23:05:14,932 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 23:05:14,939 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-22 23:05:14,951 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 23:05:14,952 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 23:05:14,954 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 23:05:14,955 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 23:05:14,973 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 23:05:14,974 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 23:05:14,977 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 23:05:14,977 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 23:05:14,978 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 23:05:14,978 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 23:05:14,978 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 23:05:14,979 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 23:05:14,979 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 23:05:14,979 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 23:05:14,980 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 23:05:14,981 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 23:05:14,981 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 23:05:14,981 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 23:05:14,982 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 23:05:14,982 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-08-22 23:05:14,982 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 23:05:14,983 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 23:05:14,983 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 23:05:14,983 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 23:05:14,983 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-08-22 23:05:14,984 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 23:05:14,984 INFO L138 SettingsManager]: * Use separate solver for trace checks=false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use separate solver for trace checks -> true [2020-08-22 23:05:15,305 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 23:05:15,319 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 23:05:15,323 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 23:05:15,325 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 23:05:15,326 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 23:05:15,327 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/cggmp2005.i [2020-08-22 23:05:15,412 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ab46fc3cb/abf2fa5186b14d09bed7e12319365fba/FLAGce38ba961 [2020-08-22 23:05:15,905 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 23:05:15,906 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/cggmp2005.i [2020-08-22 23:05:15,913 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ab46fc3cb/abf2fa5186b14d09bed7e12319365fba/FLAGce38ba961 [2020-08-22 23:05:16,309 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ab46fc3cb/abf2fa5186b14d09bed7e12319365fba [2020-08-22 23:05:16,319 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 23:05:16,321 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 23:05:16,323 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 23:05:16,323 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 23:05:16,327 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 23:05:16,328 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 11:05:16" (1/1) ... [2020-08-22 23:05:16,332 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@11b12c1b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:05:16, skipping insertion in model container [2020-08-22 23:05:16,332 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 11:05:16" (1/1) ... [2020-08-22 23:05:16,341 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 23:05:16,366 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 23:05:16,595 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 23:05:16,602 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 23:05:16,620 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 23:05:16,638 INFO L208 MainTranslator]: Completed translation [2020-08-22 23:05:16,639 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:05:16 WrapperNode [2020-08-22 23:05:16,639 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 23:05:16,640 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 23:05:16,641 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 23:05:16,641 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 23:05:16,657 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:05:16" (1/1) ... [2020-08-22 23:05:16,658 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:05:16" (1/1) ... [2020-08-22 23:05:16,745 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:05:16" (1/1) ... [2020-08-22 23:05:16,745 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:05:16" (1/1) ... [2020-08-22 23:05:16,750 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:05:16" (1/1) ... [2020-08-22 23:05:16,759 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:05:16" (1/1) ... [2020-08-22 23:05:16,760 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:05:16" (1/1) ... [2020-08-22 23:05:16,762 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 23:05:16,762 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 23:05:16,763 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 23:05:16,763 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 23:05:16,766 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:05:16" (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 23:05:16,840 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 23:05:16,840 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 23:05:16,840 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-08-22 23:05:16,840 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-22 23:05:16,840 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 23:05:16,840 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 23:05:16,841 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-22 23:05:16,841 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-08-22 23:05:16,841 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-22 23:05:16,841 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-22 23:05:16,841 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 23:05:16,841 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 23:05:16,841 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 23:05:17,036 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 23:05:17,037 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-22 23:05:17,042 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 11:05:17 BoogieIcfgContainer [2020-08-22 23:05:17,042 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 23:05:17,044 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 23:05:17,044 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 23:05:17,048 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 23:05:17,048 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 11:05:16" (1/3) ... [2020-08-22 23:05:17,050 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6850af70 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 11:05:17, skipping insertion in model container [2020-08-22 23:05:17,050 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:05:16" (2/3) ... [2020-08-22 23:05:17,050 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6850af70 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 11:05:17, skipping insertion in model container [2020-08-22 23:05:17,051 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 11:05:17" (3/3) ... [2020-08-22 23:05:17,053 INFO L109 eAbstractionObserver]: Analyzing ICFG cggmp2005.i [2020-08-22 23:05:17,065 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-22 23:05:17,074 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 23:05:17,087 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 23:05:17,115 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 23:05:17,116 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 23:05:17,116 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-22 23:05:17,116 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 23:05:17,117 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 23:05:17,117 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 23:05:17,117 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 23:05:17,117 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 23:05:17,135 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states. [2020-08-22 23:05:17,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-08-22 23:05:17,148 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:05:17,150 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:05:17,151 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:05:17,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:05:17,159 INFO L82 PathProgramCache]: Analyzing trace with hash -714485069, now seen corresponding path program 1 times [2020-08-22 23:05:17,170 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:05:17,171 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1839298923] [2020-08-22 23:05:17,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:05:17,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:17,347 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:05:17,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:17,355 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 23:05:17,357 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1839298923] [2020-08-22 23:05:17,360 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 23:05:17,361 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 23:05:17,362 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226001292] [2020-08-22 23:05:17,369 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 23:05:17,369 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:05:17,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 23:05:17,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 23:05:17,390 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 4 states. [2020-08-22 23:05:17,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:05:17,491 INFO L93 Difference]: Finished difference Result 37 states and 42 transitions. [2020-08-22 23:05:17,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-22 23:05:17,495 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2020-08-22 23:05:17,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:05:17,508 INFO L225 Difference]: With dead ends: 37 [2020-08-22 23:05:17,509 INFO L226 Difference]: Without dead ends: 18 [2020-08-22 23:05:17,515 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-22 23:05:17,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-08-22 23:05:17,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2020-08-22 23:05:17,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-08-22 23:05:17,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2020-08-22 23:05:17,574 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 13 [2020-08-22 23:05:17,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:05:17,575 INFO L479 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2020-08-22 23:05:17,575 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 23:05:17,575 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2020-08-22 23:05:17,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-08-22 23:05:17,576 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:05:17,576 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:05:17,577 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 23:05:17,577 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:05:17,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:05:17,578 INFO L82 PathProgramCache]: Analyzing trace with hash 673132007, now seen corresponding path program 1 times [2020-08-22 23:05:17,578 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:05:17,579 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1198519237] [2020-08-22 23:05:17,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:05:17,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:17,654 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:05:17,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:17,662 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:05:17,663 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1198519237] [2020-08-22 23:05:17,663 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:05:17,663 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-08-22 23:05:17,664 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069458726] [2020-08-22 23:05:17,666 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-22 23:05:17,666 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:05:17,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-22 23:05:17,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-08-22 23:05:17,668 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 6 states. [2020-08-22 23:05:17,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:05:17,763 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2020-08-22 23:05:17,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-22 23:05:17,765 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2020-08-22 23:05:17,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:05:17,766 INFO L225 Difference]: With dead ends: 26 [2020-08-22 23:05:17,767 INFO L226 Difference]: Without dead ends: 21 [2020-08-22 23:05:17,768 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-08-22 23:05:17,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-08-22 23:05:17,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2020-08-22 23:05:17,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-08-22 23:05:17,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2020-08-22 23:05:17,776 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 16 [2020-08-22 23:05:17,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:05:17,777 INFO L479 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2020-08-22 23:05:17,777 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-22 23:05:17,777 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2020-08-22 23:05:17,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-22 23:05:17,778 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:05:17,779 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:05:17,779 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 23:05:17,779 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:05:17,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:05:17,780 INFO L82 PathProgramCache]: Analyzing trace with hash 113219123, now seen corresponding path program 2 times [2020-08-22 23:05:17,780 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:05:17,781 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1367553172] [2020-08-22 23:05:17,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:05:17,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:17,900 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:05:17,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:17,906 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:05:17,907 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1367553172] [2020-08-22 23:05:17,907 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:05:17,907 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-22 23:05:17,908 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504188891] [2020-08-22 23:05:17,908 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-22 23:05:17,909 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:05:17,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-22 23:05:17,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-08-22 23:05:17,910 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 8 states. [2020-08-22 23:05:17,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:05:17,987 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2020-08-22 23:05:17,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-22 23:05:17,988 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 19 [2020-08-22 23:05:17,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:05:17,989 INFO L225 Difference]: With dead ends: 29 [2020-08-22 23:05:17,989 INFO L226 Difference]: Without dead ends: 24 [2020-08-22 23:05:17,990 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2020-08-22 23:05:17,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-08-22 23:05:17,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2020-08-22 23:05:17,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-08-22 23:05:17,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2020-08-22 23:05:17,997 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 19 [2020-08-22 23:05:17,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:05:17,998 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2020-08-22 23:05:17,998 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-22 23:05:17,998 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2020-08-22 23:05:17,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-22 23:05:17,999 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:05:17,999 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:05:17,999 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-22 23:05:18,000 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:05:18,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:05:18,000 INFO L82 PathProgramCache]: Analyzing trace with hash 1401469543, now seen corresponding path program 3 times [2020-08-22 23:05:18,001 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:05:18,001 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [702559957] [2020-08-22 23:05:18,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:05:18,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:18,118 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:05:18,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:18,123 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:05:18,124 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [702559957] [2020-08-22 23:05:18,124 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:05:18,125 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-22 23:05:18,125 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459437020] [2020-08-22 23:05:18,125 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-22 23:05:18,126 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:05:18,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-22 23:05:18,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-08-22 23:05:18,127 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 10 states. [2020-08-22 23:05:18,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:05:18,204 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2020-08-22 23:05:18,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-22 23:05:18,204 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 22 [2020-08-22 23:05:18,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:05:18,206 INFO L225 Difference]: With dead ends: 31 [2020-08-22 23:05:18,206 INFO L226 Difference]: Without dead ends: 26 [2020-08-22 23:05:18,207 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=48, Invalid=62, Unknown=0, NotChecked=0, Total=110 [2020-08-22 23:05:18,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-08-22 23:05:18,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-08-22 23:05:18,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-08-22 23:05:18,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2020-08-22 23:05:18,215 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 22 [2020-08-22 23:05:18,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:05:18,215 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2020-08-22 23:05:18,215 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-22 23:05:18,216 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2020-08-22 23:05:18,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-22 23:05:18,217 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:05:18,217 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:05:18,217 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-22 23:05:18,217 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:05:18,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:05:18,218 INFO L82 PathProgramCache]: Analyzing trace with hash -158025293, now seen corresponding path program 4 times [2020-08-22 23:05:18,218 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:05:18,219 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1758071730] [2020-08-22 23:05:18,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:05:18,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:18,435 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:05:18,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:18,440 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:05:18,440 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1758071730] [2020-08-22 23:05:18,440 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:05:18,441 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-22 23:05:18,441 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421511591] [2020-08-22 23:05:18,441 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-22 23:05:18,442 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:05:18,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-22 23:05:18,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-08-22 23:05:18,443 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand 9 states. [2020-08-22 23:05:18,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:05:18,579 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2020-08-22 23:05:18,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-22 23:05:18,580 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 25 [2020-08-22 23:05:18,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:05:18,581 INFO L225 Difference]: With dead ends: 36 [2020-08-22 23:05:18,581 INFO L226 Difference]: Without dead ends: 31 [2020-08-22 23:05:18,582 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-08-22 23:05:18,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-08-22 23:05:18,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2020-08-22 23:05:18,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-08-22 23:05:18,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2020-08-22 23:05:18,591 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 25 [2020-08-22 23:05:18,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:05:18,592 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2020-08-22 23:05:18,592 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-22 23:05:18,592 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2020-08-22 23:05:18,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-08-22 23:05:18,593 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:05:18,593 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:05:18,594 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-22 23:05:18,594 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:05:18,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:05:18,595 INFO L82 PathProgramCache]: Analyzing trace with hash -407443737, now seen corresponding path program 5 times [2020-08-22 23:05:18,595 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:05:18,595 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [17354794] [2020-08-22 23:05:18,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:05:18,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:18,772 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:05:18,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:18,777 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:05:18,777 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [17354794] [2020-08-22 23:05:18,778 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 23:05:18,778 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-08-22 23:05:18,778 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67460783] [2020-08-22 23:05:18,779 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-22 23:05:18,779 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:05:18,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-22 23:05:18,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-08-22 23:05:18,780 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 12 states. [2020-08-22 23:05:18,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:05:18,971 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2020-08-22 23:05:18,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-22 23:05:18,971 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 28 [2020-08-22 23:05:18,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:05:18,972 INFO L225 Difference]: With dead ends: 29 [2020-08-22 23:05:18,972 INFO L226 Difference]: Without dead ends: 0 [2020-08-22 23:05:18,974 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=165, Invalid=255, Unknown=0, NotChecked=0, Total=420 [2020-08-22 23:05:18,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-22 23:05:18,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-22 23:05:18,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-22 23:05:18,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-22 23:05:18,978 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 28 [2020-08-22 23:05:18,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:05:18,978 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-22 23:05:18,979 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-22 23:05:18,979 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-22 23:05:18,979 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-22 23:05:18,979 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-22 23:05:18,988 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-22 23:05:19,271 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 37 [2020-08-22 23:05:19,476 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-08-22 23:05:19,477 INFO L271 CegarLoopResult]: At program point ULTIMATE.initEXIT(line -1) the Hoare annotation is: true [2020-08-22 23:05:19,477 INFO L271 CegarLoopResult]: At program point ULTIMATE.startEXIT(line -1) the Hoare annotation is: true [2020-08-22 23:05:19,477 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-22 23:05:19,477 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-22 23:05:19,478 INFO L271 CegarLoopResult]: At program point ULTIMATE.startFINAL(line -1) the Hoare annotation is: true [2020-08-22 23:05:19,479 INFO L268 CegarLoopResult]: For program point L4-3(lines 3 5) no Hoare annotation was computed. [2020-08-22 23:05:19,479 INFO L268 CegarLoopResult]: For program point assume_abort_if_notENTRY(lines 3 5) no Hoare annotation was computed. [2020-08-22 23:05:19,479 INFO L268 CegarLoopResult]: For program point L4(line 4) no Hoare annotation was computed. [2020-08-22 23:05:19,479 INFO L268 CegarLoopResult]: For program point L4-1(line 4) no Hoare annotation was computed. [2020-08-22 23:05:19,479 INFO L268 CegarLoopResult]: For program point assume_abort_if_notEXIT(lines 3 5) no Hoare annotation was computed. [2020-08-22 23:05:19,480 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 13 23) the Hoare annotation is: true [2020-08-22 23:05:19,480 INFO L271 CegarLoopResult]: At program point mainEXIT(lines 13 23) the Hoare annotation is: true [2020-08-22 23:05:19,480 INFO L271 CegarLoopResult]: At program point L21(line 21) the Hoare annotation is: true [2020-08-22 23:05:19,481 INFO L264 CegarLoopResult]: At program point L19(line 19) the Hoare annotation is: (or (let ((.cse0 (+ main_~i~0 7))) (and (<= 10 main_~j~0) (<= main_~j~0 .cse0) (<= .cse0 main_~j~0) (<= main_~j~0 10))) (and (<= main_~j~0 7) (<= 7 main_~j~0) (<= (+ main_~j~0 2) main_~i~0)) (let ((.cse1 (+ main_~i~0 4))) (and (<= main_~j~0 .cse1) (<= 9 main_~j~0) (<= .cse1 main_~j~0) (<= main_~j~0 9))) (let ((.cse2 (+ main_~i~0 1))) (and (<= main_~j~0 8) (<= 8 main_~j~0) (<= main_~j~0 .cse2) (<= .cse2 main_~j~0)))) [2020-08-22 23:05:19,483 INFO L264 CegarLoopResult]: At program point L18(line 18) the Hoare annotation is: (or (and (<= 1 main_~i~0) (<= (+ main_~i~0 9) main_~j~0) (<= main_~j~0 10)) (let ((.cse0 (+ main_~i~0 6))) (and (<= main_~j~0 .cse0) (<= .cse0 main_~j~0) (<= 9 main_~j~0) (<= main_~j~0 9))) (let ((.cse1 (+ main_~i~0 3))) (and (<= main_~j~0 8) (<= main_~j~0 .cse1) (<= .cse1 main_~j~0) (<= 8 main_~j~0))) (and (<= main_~j~0 7) (<= 7 main_~j~0) (<= main_~j~0 main_~i~0) (<= main_~i~0 main_~j~0))) [2020-08-22 23:05:19,484 INFO L264 CegarLoopResult]: At program point L16(line 16) the Hoare annotation is: (and (<= 1 main_~i~0) (<= main_~i~0 1)) [2020-08-22 23:05:19,484 INFO L271 CegarLoopResult]: At program point L15(line 15) the Hoare annotation is: true [2020-08-22 23:05:19,484 INFO L264 CegarLoopResult]: At program point L17-2(lines 17 20) the Hoare annotation is: (or (and (<= main_~j~0 6) (<= (+ main_~j~0 3) main_~i~0) (<= 6 main_~j~0)) (and (<= 1 main_~i~0) (<= (+ main_~i~0 9) main_~j~0) (<= main_~j~0 10)) (let ((.cse0 (+ main_~i~0 6))) (and (<= main_~j~0 .cse0) (<= .cse0 main_~j~0) (<= 9 main_~j~0) (<= main_~j~0 9))) (let ((.cse1 (+ main_~i~0 3))) (and (<= main_~j~0 8) (<= main_~j~0 .cse1) (<= .cse1 main_~j~0) (<= 8 main_~j~0))) (and (<= main_~j~0 7) (<= 7 main_~j~0) (<= main_~j~0 main_~i~0) (<= main_~i~0 main_~j~0))) [2020-08-22 23:05:19,485 INFO L271 CegarLoopResult]: At program point L14(line 14) the Hoare annotation is: true [2020-08-22 23:05:19,485 INFO L264 CegarLoopResult]: At program point L17-3(lines 17 20) the Hoare annotation is: (and (<= main_~j~0 6) (<= 6 main_~j~0)) [2020-08-22 23:05:19,486 INFO L271 CegarLoopResult]: At program point mainFINAL(lines 13 23) the Hoare annotation is: true [2020-08-22 23:05:19,486 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 6 11) the Hoare annotation is: true [2020-08-22 23:05:19,486 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertEXIT(lines 6 11) the Hoare annotation is: true [2020-08-22 23:05:19,486 INFO L264 CegarLoopResult]: At program point L8(line 8) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2020-08-22 23:05:19,487 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 23:05:19,488 INFO L271 CegarLoopResult]: At program point L7-2(lines 6 11) the Hoare annotation is: true [2020-08-22 23:05:19,488 INFO L264 CegarLoopResult]: At program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 8) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2020-08-22 23:05:19,535 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.08 11:05:19 BoogieIcfgContainer [2020-08-22 23:05:19,535 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-22 23:05:19,539 INFO L168 Benchmark]: Toolchain (without parser) took 3216.16 ms. Allocated memory was 139.5 MB in the beginning and 236.5 MB in the end (delta: 97.0 MB). Free memory was 102.6 MB in the beginning and 98.9 MB in the end (delta: 3.6 MB). Peak memory consumption was 100.6 MB. Max. memory is 7.1 GB. [2020-08-22 23:05:19,540 INFO L168 Benchmark]: CDTParser took 0.38 ms. Allocated memory is still 139.5 MB. Free memory was 120.8 MB in the beginning and 120.4 MB in the end (delta: 419.7 kB). Peak memory consumption was 419.7 kB. Max. memory is 7.1 GB. [2020-08-22 23:05:19,549 INFO L168 Benchmark]: CACSL2BoogieTranslator took 317.08 ms. Allocated memory is still 139.5 MB. Free memory was 102.1 MB in the beginning and 93.1 MB in the end (delta: 9.1 MB). Peak memory consumption was 9.1 MB. Max. memory is 7.1 GB. [2020-08-22 23:05:19,551 INFO L168 Benchmark]: Boogie Preprocessor took 121.45 ms. Allocated memory was 139.5 MB in the beginning and 202.9 MB in the end (delta: 63.4 MB). Free memory was 93.1 MB in the beginning and 181.7 MB in the end (delta: -88.6 MB). Peak memory consumption was 14.0 MB. Max. memory is 7.1 GB. [2020-08-22 23:05:19,552 INFO L168 Benchmark]: RCFGBuilder took 280.03 ms. Allocated memory is still 202.9 MB. Free memory was 181.7 MB in the beginning and 169.1 MB in the end (delta: 12.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 7.1 GB. [2020-08-22 23:05:19,553 INFO L168 Benchmark]: TraceAbstraction took 2491.49 ms. Allocated memory was 202.9 MB in the beginning and 236.5 MB in the end (delta: 33.6 MB). Free memory was 169.1 MB in the beginning and 98.9 MB in the end (delta: 70.2 MB). Peak memory consumption was 103.7 MB. Max. memory is 7.1 GB. [2020-08-22 23:05:19,566 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.38 ms. Allocated memory is still 139.5 MB. Free memory was 120.8 MB in the beginning and 120.4 MB in the end (delta: 419.7 kB). Peak memory consumption was 419.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 317.08 ms. Allocated memory is still 139.5 MB. Free memory was 102.1 MB in the beginning and 93.1 MB in the end (delta: 9.1 MB). Peak memory consumption was 9.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 121.45 ms. Allocated memory was 139.5 MB in the beginning and 202.9 MB in the end (delta: 63.4 MB). Free memory was 93.1 MB in the beginning and 181.7 MB in the end (delta: -88.6 MB). Peak memory consumption was 14.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 280.03 ms. Allocated memory is still 202.9 MB. Free memory was 181.7 MB in the beginning and 169.1 MB in the end (delta: 12.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2491.49 ms. Allocated memory was 202.9 MB in the beginning and 236.5 MB in the end (delta: 33.6 MB). Free memory was 169.1 MB in the beginning and 98.9 MB in the end (delta: 70.2 MB). Peak memory consumption was 103.7 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: 17]: Loop Invariant Derived loop invariant: (((((j <= 6 && j + 3 <= i) && 6 <= j) || ((1 <= i && i + 9 <= j) && j <= 10)) || (((j <= i + 6 && i + 6 <= j) && 9 <= j) && j <= 9)) || (((j <= 8 && j <= i + 3) && i + 3 <= j) && 8 <= j)) || (((j <= 7 && 7 <= j) && j <= i) && i <= j) - 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: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 28 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 1.8s, OverallIterations: 6, TraceHistogramMax: 5, AutomataDifference: 0.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.4s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 84 SDtfs, 27 SDslu, 263 SDs, 0 SdLazy, 261 SolverSat, 26 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 75 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=29occurred in iteration=5, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 6 MinimizatonAttempts, 5 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 23 LocationsWithAnnotation, 53 PreInvPairs, 82 NumberOfFragments, 239 HoareAnnotationTreeSize, 53 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 23 FomulaSimplificationsInter, 60 FormulaSimplificationTreeSizeReductionInter, 0.3s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.7s InterpolantComputationTime, 123 NumberOfCodeBlocks, 123 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 117 ConstructedInterpolants, 0 QuantifiedInterpolants, 7671 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 6 InterpolantComputations, 2 PerfectInterpolantSequences, 35/75 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...