/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/recursive-simple/id2_b3_o5.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-72570d3 [2020-08-22 22:09:53,681 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 22:09:53,684 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 22:09:53,707 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-22 22:09:53,707 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-22 22:09:53,708 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-22 22:09:53,709 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-22 22:09:53,711 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-22 22:09:53,713 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-22 22:09:53,713 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-22 22:09:53,714 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-22 22:09:53,715 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-22 22:09:53,716 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 22:09:53,717 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 22:09:53,718 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 22:09:53,719 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 22:09:53,719 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 22:09:53,721 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 22:09:53,722 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 22:09:53,724 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 22:09:53,726 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 22:09:53,727 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 22:09:53,728 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 22:09:53,729 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 22:09:53,731 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-22 22:09:53,739 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 22:09:53,739 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 22:09:53,740 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 22:09:53,741 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 22:09:53,750 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 22:09:53,750 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 22:09:53,751 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 22:09:53,751 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 22:09:53,752 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 22:09:53,752 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 22:09:53,752 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 22:09:53,752 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 22:09:53,752 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 22:09:53,753 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 22:09:53,753 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 22:09:53,753 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 22:09:53,753 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 22:09:53,753 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 22:09:53,754 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 22:09:53,754 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-08-22 22:09:53,754 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 22:09:53,754 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 22:09:53,754 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 22:09:53,755 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 22:09:53,755 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-08-22 22:09:53,755 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 22:09:53,755 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 22:09:54,069 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 22:09:54,090 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 22:09:54,095 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 22:09:54,098 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 22:09:54,098 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 22:09:54,099 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/id2_b3_o5.c [2020-08-22 22:09:54,159 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4254c2c38/1ff47240e3dc4a59a1bcfadbd5f46f77/FLAG2827b7a40 [2020-08-22 22:09:54,622 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 22:09:54,623 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/id2_b3_o5.c [2020-08-22 22:09:54,630 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4254c2c38/1ff47240e3dc4a59a1bcfadbd5f46f77/FLAG2827b7a40 [2020-08-22 22:09:55,025 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4254c2c38/1ff47240e3dc4a59a1bcfadbd5f46f77 [2020-08-22 22:09:55,037 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 22:09:55,041 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 22:09:55,043 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 22:09:55,044 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 22:09:55,047 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 22:09:55,048 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 10:09:55" (1/1) ... [2020-08-22 22:09:55,051 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2d171bc9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:09:55, skipping insertion in model container [2020-08-22 22:09:55,051 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 10:09:55" (1/1) ... [2020-08-22 22:09:55,060 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 22:09:55,078 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 22:09:55,233 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 22:09:55,237 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 22:09:55,253 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 22:09:55,267 INFO L208 MainTranslator]: Completed translation [2020-08-22 22:09:55,267 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:09:55 WrapperNode [2020-08-22 22:09:55,268 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 22:09:55,268 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 22:09:55,269 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 22:09:55,269 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 22:09:55,279 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:09:55" (1/1) ... [2020-08-22 22:09:55,279 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:09:55" (1/1) ... [2020-08-22 22:09:55,358 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:09:55" (1/1) ... [2020-08-22 22:09:55,358 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:09:55" (1/1) ... [2020-08-22 22:09:55,362 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:09:55" (1/1) ... [2020-08-22 22:09:55,364 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:09:55" (1/1) ... [2020-08-22 22:09:55,365 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:09:55" (1/1) ... [2020-08-22 22:09:55,367 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 22:09:55,367 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 22:09:55,367 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 22:09:55,368 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 22:09:55,368 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:09:55" (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 22:09:55,433 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 22:09:55,433 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 22:09:55,433 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2020-08-22 22:09:55,433 INFO L138 BoogieDeclarations]: Found implementation of procedure id2 [2020-08-22 22:09:55,434 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 22:09:55,434 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-08-22 22:09:55,434 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 22:09:55,434 INFO L130 BoogieDeclarations]: Found specification of procedure id [2020-08-22 22:09:55,434 INFO L130 BoogieDeclarations]: Found specification of procedure id2 [2020-08-22 22:09:55,435 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 22:09:55,435 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 22:09:55,435 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 22:09:55,641 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 22:09:55,642 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-22 22:09:55,645 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 10:09:55 BoogieIcfgContainer [2020-08-22 22:09:55,645 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 22:09:55,646 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 22:09:55,647 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 22:09:55,650 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 22:09:55,650 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 10:09:55" (1/3) ... [2020-08-22 22:09:55,651 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@563e06e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 10:09:55, skipping insertion in model container [2020-08-22 22:09:55,651 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:09:55" (2/3) ... [2020-08-22 22:09:55,651 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@563e06e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 10:09:55, skipping insertion in model container [2020-08-22 22:09:55,652 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 10:09:55" (3/3) ... [2020-08-22 22:09:55,653 INFO L109 eAbstractionObserver]: Analyzing ICFG id2_b3_o5.c [2020-08-22 22:09:55,663 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-22 22:09:55,670 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 22:09:55,682 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 22:09:55,703 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 22:09:55,703 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 22:09:55,704 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-22 22:09:55,704 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 22:09:55,704 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 22:09:55,704 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 22:09:55,704 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 22:09:55,704 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 22:09:55,719 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states. [2020-08-22 22:09:55,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-08-22 22:09:55,730 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:09:55,731 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:09:55,731 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:09:55,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:09:55,737 INFO L82 PathProgramCache]: Analyzing trace with hash 875745540, now seen corresponding path program 1 times [2020-08-22 22:09:55,744 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:09:55,745 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1250581029] [2020-08-22 22:09:55,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:09:55,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:09:56,035 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:09:56,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:09:56,041 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 22:09:56,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:09:56,075 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 22:09:56,076 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1250581029] [2020-08-22 22:09:56,078 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 22:09:56,078 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-22 22:09:56,079 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938425426] [2020-08-22 22:09:56,084 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 22:09:56,084 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:09:56,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 22:09:56,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-22 22:09:56,103 INFO L87 Difference]: Start difference. First operand 38 states. Second operand 5 states. [2020-08-22 22:09:56,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:09:56,194 INFO L93 Difference]: Finished difference Result 51 states and 57 transitions. [2020-08-22 22:09:56,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-22 22:09:56,196 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-08-22 22:09:56,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:09:56,207 INFO L225 Difference]: With dead ends: 51 [2020-08-22 22:09:56,208 INFO L226 Difference]: Without dead ends: 36 [2020-08-22 22:09:56,211 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-22 22:09:56,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-08-22 22:09:56,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-08-22 22:09:56,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-08-22 22:09:56,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2020-08-22 22:09:56,260 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 16 [2020-08-22 22:09:56,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:09:56,261 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2020-08-22 22:09:56,261 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 22:09:56,261 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2020-08-22 22:09:56,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-22 22:09:56,264 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:09:56,264 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] [2020-08-22 22:09:56,264 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 22:09:56,265 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:09:56,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:09:56,265 INFO L82 PathProgramCache]: Analyzing trace with hash 71846672, now seen corresponding path program 1 times [2020-08-22 22:09:56,266 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:09:56,266 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [343630183] [2020-08-22 22:09:56,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:09:56,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:09:56,363 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:09:56,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:09:56,367 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 22:09:56,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:09:56,455 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:09:56,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:09:56,494 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 22:09:56,495 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [343630183] [2020-08-22 22:09:56,496 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 22:09:56,496 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-22 22:09:56,496 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573306090] [2020-08-22 22:09:56,498 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-22 22:09:56,498 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:09:56,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-22 22:09:56,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-08-22 22:09:56,499 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand 8 states. [2020-08-22 22:09:56,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:09:56,609 INFO L93 Difference]: Finished difference Result 66 states and 74 transitions. [2020-08-22 22:09:56,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-22 22:09:56,609 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 25 [2020-08-22 22:09:56,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:09:56,611 INFO L225 Difference]: With dead ends: 66 [2020-08-22 22:09:56,611 INFO L226 Difference]: Without dead ends: 44 [2020-08-22 22:09:56,613 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-08-22 22:09:56,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-08-22 22:09:56,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 42. [2020-08-22 22:09:56,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-08-22 22:09:56,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 46 transitions. [2020-08-22 22:09:56,626 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 46 transitions. Word has length 25 [2020-08-22 22:09:56,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:09:56,627 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 46 transitions. [2020-08-22 22:09:56,627 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-22 22:09:56,627 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 46 transitions. [2020-08-22 22:09:56,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-08-22 22:09:56,629 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:09:56,629 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-08-22 22:09:56,629 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 22:09:56,630 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:09:56,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:09:56,630 INFO L82 PathProgramCache]: Analyzing trace with hash -511991682, now seen corresponding path program 1 times [2020-08-22 22:09:56,630 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:09:56,631 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1792898074] [2020-08-22 22:09:56,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:09:56,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:09:56,671 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:09:56,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:09:56,674 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 22:09:56,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:09:56,749 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:09:56,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:09:56,778 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:09:56,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:09:56,787 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-08-22 22:09:56,788 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1792898074] [2020-08-22 22:09:56,788 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 22:09:56,789 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-22 22:09:56,789 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883944623] [2020-08-22 22:09:56,790 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 22:09:56,790 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:09:56,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 22:09:56,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-22 22:09:56,791 INFO L87 Difference]: Start difference. First operand 42 states and 46 transitions. Second operand 5 states. [2020-08-22 22:09:56,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:09:56,858 INFO L93 Difference]: Finished difference Result 69 states and 77 transitions. [2020-08-22 22:09:56,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-22 22:09:56,858 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 34 [2020-08-22 22:09:56,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:09:56,860 INFO L225 Difference]: With dead ends: 69 [2020-08-22 22:09:56,860 INFO L226 Difference]: Without dead ends: 50 [2020-08-22 22:09:56,861 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 11 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 22:09:56,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-08-22 22:09:56,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 47. [2020-08-22 22:09:56,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-08-22 22:09:56,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 51 transitions. [2020-08-22 22:09:56,874 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 51 transitions. Word has length 34 [2020-08-22 22:09:56,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:09:56,874 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 51 transitions. [2020-08-22 22:09:56,875 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 22:09:56,875 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 51 transitions. [2020-08-22 22:09:56,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-08-22 22:09:56,876 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:09:56,877 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-08-22 22:09:56,877 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-22 22:09:56,877 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:09:56,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:09:56,877 INFO L82 PathProgramCache]: Analyzing trace with hash -1477652418, now seen corresponding path program 1 times [2020-08-22 22:09:56,878 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:09:56,878 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [32985762] [2020-08-22 22:09:56,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:09:56,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:09:56,940 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:09:56,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:09:56,942 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 22:09:56,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:09:56,979 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:09:56,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:09:56,986 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:09:56,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:09:56,991 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-08-22 22:09:56,992 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [32985762] [2020-08-22 22:09:56,992 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 22:09:56,992 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-22 22:09:56,993 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842575567] [2020-08-22 22:09:56,993 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 22:09:56,993 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:09:56,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 22:09:56,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-22 22:09:56,994 INFO L87 Difference]: Start difference. First operand 47 states and 51 transitions. Second operand 5 states. [2020-08-22 22:09:57,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:09:57,027 INFO L93 Difference]: Finished difference Result 54 states and 58 transitions. [2020-08-22 22:09:57,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-22 22:09:57,028 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 34 [2020-08-22 22:09:57,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:09:57,029 INFO L225 Difference]: With dead ends: 54 [2020-08-22 22:09:57,030 INFO L226 Difference]: Without dead ends: 49 [2020-08-22 22:09:57,030 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 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 22:09:57,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-08-22 22:09:57,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 47. [2020-08-22 22:09:57,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-08-22 22:09:57,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 51 transitions. [2020-08-22 22:09:57,041 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 51 transitions. Word has length 34 [2020-08-22 22:09:57,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:09:57,041 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 51 transitions. [2020-08-22 22:09:57,042 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 22:09:57,042 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 51 transitions. [2020-08-22 22:09:57,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-08-22 22:09:57,043 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:09:57,043 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-08-22 22:09:57,044 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-22 22:09:57,044 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:09:57,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:09:57,044 INFO L82 PathProgramCache]: Analyzing trace with hash -2109914946, now seen corresponding path program 1 times [2020-08-22 22:09:57,045 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:09:57,045 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1311387462] [2020-08-22 22:09:57,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:09:57,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:09:57,101 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:09:57,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:09:57,104 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 22:09:57,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:09:57,176 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:09:57,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:09:57,255 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:09:57,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:09:57,294 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-08-22 22:09:57,295 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1311387462] [2020-08-22 22:09:57,295 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 22:09:57,295 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-22 22:09:57,296 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421498047] [2020-08-22 22:09:57,297 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-22 22:09:57,298 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:09:57,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-22 22:09:57,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-08-22 22:09:57,299 INFO L87 Difference]: Start difference. First operand 47 states and 51 transitions. Second operand 11 states. [2020-08-22 22:09:57,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:09:57,499 INFO L93 Difference]: Finished difference Result 90 states and 99 transitions. [2020-08-22 22:09:57,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-22 22:09:57,501 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 34 [2020-08-22 22:09:57,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:09:57,503 INFO L225 Difference]: With dead ends: 90 [2020-08-22 22:09:57,503 INFO L226 Difference]: Without dead ends: 61 [2020-08-22 22:09:57,504 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2020-08-22 22:09:57,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-08-22 22:09:57,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 53. [2020-08-22 22:09:57,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-08-22 22:09:57,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 57 transitions. [2020-08-22 22:09:57,524 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 57 transitions. Word has length 34 [2020-08-22 22:09:57,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:09:57,524 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 57 transitions. [2020-08-22 22:09:57,524 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-22 22:09:57,525 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 57 transitions. [2020-08-22 22:09:57,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-08-22 22:09:57,526 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:09:57,526 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:09:57,526 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-22 22:09:57,527 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:09:57,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:09:57,527 INFO L82 PathProgramCache]: Analyzing trace with hash 830258234, now seen corresponding path program 1 times [2020-08-22 22:09:57,527 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:09:57,528 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [551362808] [2020-08-22 22:09:57,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:09:57,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:09:57,581 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:09:57,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:09:57,583 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 22:09:57,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:09:57,632 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:09:57,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:09:57,690 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:09:57,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:09:57,757 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:09:57,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:09:57,795 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-22 22:09:57,795 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [551362808] [2020-08-22 22:09:57,796 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 22:09:57,796 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-08-22 22:09:57,796 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827176068] [2020-08-22 22:09:57,797 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-22 22:09:57,797 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:09:57,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-22 22:09:57,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2020-08-22 22:09:57,798 INFO L87 Difference]: Start difference. First operand 53 states and 57 transitions. Second operand 14 states. [2020-08-22 22:09:58,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:09:58,053 INFO L93 Difference]: Finished difference Result 104 states and 113 transitions. [2020-08-22 22:09:58,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-08-22 22:09:58,054 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 43 [2020-08-22 22:09:58,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:09:58,055 INFO L225 Difference]: With dead ends: 104 [2020-08-22 22:09:58,055 INFO L226 Difference]: Without dead ends: 75 [2020-08-22 22:09:58,056 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2020-08-22 22:09:58,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-08-22 22:09:58,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 59. [2020-08-22 22:09:58,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-08-22 22:09:58,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 63 transitions. [2020-08-22 22:09:58,068 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 63 transitions. Word has length 43 [2020-08-22 22:09:58,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:09:58,068 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 63 transitions. [2020-08-22 22:09:58,069 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-22 22:09:58,069 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 63 transitions. [2020-08-22 22:09:58,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-08-22 22:09:58,070 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:09:58,070 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:09:58,071 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-22 22:09:58,071 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:09:58,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:09:58,071 INFO L82 PathProgramCache]: Analyzing trace with hash 444280, now seen corresponding path program 2 times [2020-08-22 22:09:58,072 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:09:58,072 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2059299014] [2020-08-22 22:09:58,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:09:58,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:09:58,101 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:09:58,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:09:58,103 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 22:09:58,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:09:58,148 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:09:58,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:09:58,191 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:09:58,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:09:58,241 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:09:58,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:09:58,298 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:09:58,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:09:58,332 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-08-22 22:09:58,333 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2059299014] [2020-08-22 22:09:58,333 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 22:09:58,333 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-08-22 22:09:58,333 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600534337] [2020-08-22 22:09:58,334 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-22 22:09:58,334 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:09:58,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-22 22:09:58,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2020-08-22 22:09:58,335 INFO L87 Difference]: Start difference. First operand 59 states and 63 transitions. Second operand 14 states. [2020-08-22 22:09:58,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:09:58,585 INFO L93 Difference]: Finished difference Result 111 states and 119 transitions. [2020-08-22 22:09:58,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-08-22 22:09:58,586 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 52 [2020-08-22 22:09:58,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:09:58,587 INFO L225 Difference]: With dead ends: 111 [2020-08-22 22:09:58,587 INFO L226 Difference]: Without dead ends: 85 [2020-08-22 22:09:58,589 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2020-08-22 22:09:58,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-08-22 22:09:58,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 77. [2020-08-22 22:09:58,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-08-22 22:09:58,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 81 transitions. [2020-08-22 22:09:58,601 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 81 transitions. Word has length 52 [2020-08-22 22:09:58,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:09:58,602 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 81 transitions. [2020-08-22 22:09:58,602 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-22 22:09:58,602 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 81 transitions. [2020-08-22 22:09:58,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-08-22 22:09:58,604 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:09:58,604 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:09:58,604 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-22 22:09:58,604 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:09:58,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:09:58,605 INFO L82 PathProgramCache]: Analyzing trace with hash -1783783324, now seen corresponding path program 2 times [2020-08-22 22:09:58,605 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:09:58,605 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1876004515] [2020-08-22 22:09:58,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:09:58,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:09:58,639 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:09:58,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:09:58,641 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 22:09:58,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:09:58,687 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:09:58,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:09:58,752 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:09:58,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:09:58,813 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:09:58,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:09:58,860 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:09:58,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:09:58,914 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:09:58,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:09:58,951 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 17 proven. 11 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-08-22 22:09:58,952 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1876004515] [2020-08-22 22:09:58,952 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 22:09:58,952 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-08-22 22:09:58,953 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843495197] [2020-08-22 22:09:58,953 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-22 22:09:58,953 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:09:58,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-22 22:09:58,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2020-08-22 22:09:58,954 INFO L87 Difference]: Start difference. First operand 77 states and 81 transitions. Second operand 14 states. [2020-08-22 22:09:59,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:09:59,192 INFO L93 Difference]: Finished difference Result 93 states and 98 transitions. [2020-08-22 22:09:59,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-08-22 22:09:59,193 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 61 [2020-08-22 22:09:59,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:09:59,193 INFO L225 Difference]: With dead ends: 93 [2020-08-22 22:09:59,194 INFO L226 Difference]: Without dead ends: 0 [2020-08-22 22:09:59,195 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2020-08-22 22:09:59,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-22 22:09:59,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-22 22:09:59,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-22 22:09:59,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-22 22:09:59,196 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 61 [2020-08-22 22:09:59,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:09:59,196 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-22 22:09:59,197 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-22 22:09:59,197 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-22 22:09:59,197 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-22 22:09:59,197 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-22 22:09:59,200 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-22 22:09:59,764 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-08-22 22:09:59,764 INFO L271 CegarLoopResult]: At program point ULTIMATE.initEXIT(line -1) the Hoare annotation is: true [2020-08-22 22:09:59,765 INFO L264 CegarLoopResult]: At program point id2FINAL(lines 14 19) the Hoare annotation is: (or (and (<= |id2_#res| 0) (<= 0 |id2_#res|)) (and (<= |id2_#res| 1) (<= 1 id2_~ret~1) (<= id2_~ret~1 1) (<= 1 |id2_#res|)) (and (<= 2 |id2_#res|) (<= id2_~ret~1 2) (<= |id2_#res| 2) (<= 2 id2_~ret~1)) (and (<= |id2_#res| 3) (<= 3 |id2_#res|))) [2020-08-22 22:09:59,765 INFO L264 CegarLoopResult]: At program point L18(line 18) the Hoare annotation is: (or (and (<= 1 id2_~ret~1) (<= id2_~ret~1 1)) (and (<= id2_~ret~1 2) (<= 2 id2_~ret~1)) (and (<= 3 id2_~ret~1) (<= id2_~ret~1 3))) [2020-08-22 22:09:59,765 INFO L264 CegarLoopResult]: At program point L17(line 17) the Hoare annotation is: (or (and (<= 1 id2_~ret~1) (<= id2_~ret~1 1)) (and (<= id2_~ret~1 2) (<= 2 id2_~ret~1)) (and (<= 4 id2_~ret~1) (<= (div id2_~ret~1 4294967296) 0)) (and (<= 3 id2_~ret~1) (<= id2_~ret~1 3))) [2020-08-22 22:09:59,765 INFO L271 CegarLoopResult]: At program point L16(line 16) the Hoare annotation is: true [2020-08-22 22:09:59,765 INFO L264 CegarLoopResult]: At program point L17-1(line 17) the Hoare annotation is: (and (<= 4 id2_~ret~1) (<= (div id2_~ret~1 4294967296) 0)) [2020-08-22 22:09:59,766 INFO L271 CegarLoopResult]: At program point L15(line 15) the Hoare annotation is: true [2020-08-22 22:09:59,766 INFO L264 CegarLoopResult]: At program point L16-1(line 16) the Hoare annotation is: (or (and (<= 2 |id2_#t~ret1|) (<= |id2_#t~ret1| 2)) (and (<= |id2_#t~ret1| 1) (<= 1 |id2_#t~ret1|)) (and (<= 0 |id2_#t~ret1|) (<= |id2_#t~ret1| 0)) (and (<= 3 |id2_#t~ret1|) (<= |id2_#t~ret1| 3))) [2020-08-22 22:09:59,766 INFO L271 CegarLoopResult]: At program point L15-1(line 15) the Hoare annotation is: true [2020-08-22 22:09:59,766 INFO L264 CegarLoopResult]: At program point L16-2(line 16) the Hoare annotation is: (or (and (<= 4 id2_~ret~1) (<= 3 |id2_#t~ret1|) (<= (div id2_~ret~1 4294967296) 0) (<= |id2_#t~ret1| 3)) (and (<= 0 |id2_#t~ret1|) (<= |id2_#t~ret1| 0) (<= 1 id2_~ret~1) (<= id2_~ret~1 1)) (and (<= |id2_#t~ret1| 1) (<= 1 |id2_#t~ret1|) (<= id2_~ret~1 2) (<= 2 id2_~ret~1)) (and (<= 2 |id2_#t~ret1|) (<= |id2_#t~ret1| 2) (<= 3 id2_~ret~1) (<= id2_~ret~1 3))) [2020-08-22 22:09:59,767 INFO L264 CegarLoopResult]: At program point id2EXIT(lines 14 19) the Hoare annotation is: (or (and (<= |id2_#res| 0) (<= 0 |id2_#res|)) (and (<= |id2_#res| 1) (<= 1 id2_~ret~1) (<= id2_~ret~1 1) (<= 1 |id2_#res|)) (and (<= 2 |id2_#res|) (<= id2_~ret~1 2) (<= |id2_#res| 2) (<= 2 id2_~ret~1)) (and (<= |id2_#res| 3) (<= 3 |id2_#res|))) [2020-08-22 22:09:59,767 INFO L271 CegarLoopResult]: At program point id2ENTRY(lines 14 19) the Hoare annotation is: true [2020-08-22 22:09:59,767 INFO L271 CegarLoopResult]: At program point ULTIMATE.startEXIT(line -1) the Hoare annotation is: true [2020-08-22 22:09:59,767 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-22 22:09:59,767 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-22 22:09:59,768 INFO L271 CegarLoopResult]: At program point ULTIMATE.startFINAL(line -1) the Hoare annotation is: true [2020-08-22 22:09:59,768 INFO L264 CegarLoopResult]: At program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 25) the Hoare annotation is: false [2020-08-22 22:09:59,768 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 21 27) the Hoare annotation is: true [2020-08-22 22:09:59,768 INFO L264 CegarLoopResult]: At program point L25(line 25) the Hoare annotation is: false [2020-08-22 22:09:59,768 INFO L271 CegarLoopResult]: At program point mainEXIT(lines 21 27) the Hoare annotation is: true [2020-08-22 22:09:59,769 INFO L264 CegarLoopResult]: At program point L24(lines 24 26) the Hoare annotation is: (and (<= main_~result~0 3) (< 0 (+ (div main_~result~0 4294967296) 1))) [2020-08-22 22:09:59,769 INFO L271 CegarLoopResult]: At program point L23(line 23) the Hoare annotation is: true [2020-08-22 22:09:59,769 INFO L271 CegarLoopResult]: At program point L22(line 22) the Hoare annotation is: true [2020-08-22 22:09:59,769 INFO L264 CegarLoopResult]: At program point L23-1(line 23) the Hoare annotation is: (or (and (<= |main_#t~ret3| 3) (<= 3 |main_#t~ret3|)) (and (<= |main_#t~ret3| 0) (<= 0 |main_#t~ret3|)) (and (<= 2 |main_#t~ret3|) (<= |main_#t~ret3| 2)) (and (<= |main_#t~ret3| 1) (<= 1 |main_#t~ret3|))) [2020-08-22 22:09:59,769 INFO L271 CegarLoopResult]: At program point L24-2(lines 21 27) the Hoare annotation is: true [2020-08-22 22:09:59,770 INFO L264 CegarLoopResult]: At program point L23-2(line 23) the Hoare annotation is: (let ((.cse0 (< 0 (+ (div main_~result~0 4294967296) 1)))) (or (and (<= |main_#t~ret3| 0) (<= main_~result~0 0) (<= 0 |main_#t~ret3|) .cse0) (and (<= main_~result~0 3) .cse0 (<= |main_#t~ret3| 3) (<= 3 |main_#t~ret3|)) (and (<= 2 |main_#t~ret3|) (<= main_~result~0 2) (<= |main_#t~ret3| 2) .cse0) (and (<= |main_#t~ret3| 1) (<= main_~result~0 1) (<= 1 |main_#t~ret3|) .cse0))) [2020-08-22 22:09:59,770 INFO L264 CegarLoopResult]: At program point idFINAL(lines 7 12) the Hoare annotation is: (or (and (<= |id_#res| 1) (<= id_~ret~0 1) (<= 1 |id_#res|) (<= 1 id_~ret~0)) (and (<= id_~ret~0 2) (<= 2 |id_#res|) (<= |id_#res| 2) (<= 2 id_~ret~0)) (and (<= 0 |id_#res|) (<= |id_#res| 0)) (and (<= |id_#res| 3) (<= 3 |id_#res|))) [2020-08-22 22:09:59,770 INFO L264 CegarLoopResult]: At program point idEXIT(lines 7 12) the Hoare annotation is: (or (and (<= |id_#res| 1) (<= id_~ret~0 1) (<= 1 |id_#res|) (<= 1 id_~ret~0)) (and (<= id_~ret~0 2) (<= 2 |id_#res|) (<= |id_#res| 2) (<= 2 id_~ret~0)) (and (<= 0 |id_#res|) (<= |id_#res| 0)) (and (<= |id_#res| 3) (<= 3 |id_#res|))) [2020-08-22 22:09:59,770 INFO L271 CegarLoopResult]: At program point idENTRY(lines 7 12) the Hoare annotation is: true [2020-08-22 22:09:59,770 INFO L264 CegarLoopResult]: At program point L11(line 11) the Hoare annotation is: (or (and (<= id_~ret~0 2) (<= 2 id_~ret~0)) (and (<= 3 id_~ret~0) (<= id_~ret~0 3)) (and (<= id_~ret~0 1) (<= 1 id_~ret~0))) [2020-08-22 22:09:59,771 INFO L264 CegarLoopResult]: At program point L10(line 10) the Hoare annotation is: (or (and (<= 4 id_~ret~0) (<= (div id_~ret~0 4294967296) 0)) (and (<= id_~ret~0 2) (<= 2 id_~ret~0)) (and (<= 3 id_~ret~0) (<= id_~ret~0 3)) (and (<= id_~ret~0 1) (<= 1 id_~ret~0))) [2020-08-22 22:09:59,771 INFO L271 CegarLoopResult]: At program point L9(line 9) the Hoare annotation is: true [2020-08-22 22:09:59,771 INFO L271 CegarLoopResult]: At program point L10-1(line 10) the Hoare annotation is: true [2020-08-22 22:09:59,771 INFO L271 CegarLoopResult]: At program point L8(line 8) the Hoare annotation is: true [2020-08-22 22:09:59,771 INFO L264 CegarLoopResult]: At program point L9-1(line 9) the Hoare annotation is: (or (and (<= 1 |id_#t~ret0|) (<= |id_#t~ret0| 1)) (and (<= |id_#t~ret0| 2) (<= 2 |id_#t~ret0|)) (and (<= 3 |id_#t~ret0|) (<= |id_#t~ret0| 3)) (and (<= 0 |id_#t~ret0|) (<= |id_#t~ret0| 0))) [2020-08-22 22:09:59,771 INFO L271 CegarLoopResult]: At program point L8-1(line 8) the Hoare annotation is: true [2020-08-22 22:09:59,772 INFO L264 CegarLoopResult]: At program point L9-2(line 9) the Hoare annotation is: (or (and (<= 4 id_~ret~0) (<= (div id_~ret~0 4294967296) 0) (<= 3 |id_#t~ret0|) (<= |id_#t~ret0| 3)) (and (<= |id_#t~ret0| 2) (<= 3 id_~ret~0) (<= id_~ret~0 3) (<= 2 |id_#t~ret0|)) (and (<= 0 |id_#t~ret0|) (<= |id_#t~ret0| 0) (<= id_~ret~0 1) (<= 1 id_~ret~0)) (and (<= id_~ret~0 2) (<= 1 |id_#t~ret0|) (<= |id_#t~ret0| 1) (<= 2 id_~ret~0))) [2020-08-22 22:09:59,793 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.08 10:09:59 BoogieIcfgContainer [2020-08-22 22:09:59,794 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-22 22:09:59,796 INFO L168 Benchmark]: Toolchain (without parser) took 4755.27 ms. Allocated memory was 138.9 MB in the beginning and 281.0 MB in the end (delta: 142.1 MB). Free memory was 102.2 MB in the beginning and 191.9 MB in the end (delta: -89.7 MB). Peak memory consumption was 114.4 MB. Max. memory is 7.1 GB. [2020-08-22 22:09:59,797 INFO L168 Benchmark]: CDTParser took 0.80 ms. Allocated memory is still 138.9 MB. Free memory was 120.2 MB in the beginning and 120.0 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-08-22 22:09:59,798 INFO L168 Benchmark]: CACSL2BoogieTranslator took 224.54 ms. Allocated memory is still 138.9 MB. Free memory was 102.0 MB in the beginning and 92.6 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. [2020-08-22 22:09:59,799 INFO L168 Benchmark]: Boogie Preprocessor took 98.48 ms. Allocated memory was 138.9 MB in the beginning and 201.3 MB in the end (delta: 62.4 MB). Free memory was 92.6 MB in the beginning and 179.8 MB in the end (delta: -87.2 MB). Peak memory consumption was 13.9 MB. Max. memory is 7.1 GB. [2020-08-22 22:09:59,800 INFO L168 Benchmark]: RCFGBuilder took 278.27 ms. Allocated memory is still 201.3 MB. Free memory was 179.8 MB in the beginning and 166.7 MB in the end (delta: 13.0 MB). Peak memory consumption was 12.6 MB. Max. memory is 7.1 GB. [2020-08-22 22:09:59,801 INFO L168 Benchmark]: TraceAbstraction took 4147.19 ms. Allocated memory was 201.3 MB in the beginning and 281.0 MB in the end (delta: 79.7 MB). Free memory was 166.1 MB in the beginning and 191.9 MB in the end (delta: -25.8 MB). Peak memory consumption was 115.9 MB. Max. memory is 7.1 GB. [2020-08-22 22:09:59,805 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.80 ms. Allocated memory is still 138.9 MB. Free memory was 120.2 MB in the beginning and 120.0 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 224.54 ms. Allocated memory is still 138.9 MB. Free memory was 102.0 MB in the beginning and 92.6 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 98.48 ms. Allocated memory was 138.9 MB in the beginning and 201.3 MB in the end (delta: 62.4 MB). Free memory was 92.6 MB in the beginning and 179.8 MB in the end (delta: -87.2 MB). Peak memory consumption was 13.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 278.27 ms. Allocated memory is still 201.3 MB. Free memory was 179.8 MB in the beginning and 166.7 MB in the end (delta: 13.0 MB). Peak memory consumption was 12.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 4147.19 ms. Allocated memory was 201.3 MB in the beginning and 281.0 MB in the end (delta: 79.7 MB). Free memory was 166.1 MB in the beginning and 191.9 MB in the end (delta: -25.8 MB). Peak memory consumption was 115.9 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 25]: 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 - ProcedureContractResult [Line: 14]: Procedure Contract for id2 Derived contract for procedure id2: (((\result <= 0 && 0 <= \result) || (((\result <= 1 && 1 <= ret) && ret <= 1) && 1 <= \result)) || (((2 <= \result && ret <= 2) && \result <= 2) && 2 <= ret)) || (\result <= 3 && 3 <= \result) - ProcedureContractResult [Line: 21]: Procedure Contract for main Derived contract for procedure main: 1 - ProcedureContractResult [Line: 7]: Procedure Contract for id Derived contract for procedure id: (((((\result <= 1 && ret <= 1) && 1 <= \result) && 1 <= ret) || (((ret <= 2 && 2 <= \result) && \result <= 2) && 2 <= ret)) || (0 <= \result && \result <= 0)) || (\result <= 3 && 3 <= \result) - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 38 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 3.4s, OverallIterations: 8, TraceHistogramMax: 3, AutomataDifference: 1.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.5s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 330 SDtfs, 55 SDslu, 2332 SDs, 0 SdLazy, 623 SolverSat, 9 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 182 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 1.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=77occurred in iteration=7, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 8 MinimizatonAttempts, 39 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 38 LocationsWithAnnotation, 49 PreInvPairs, 194 NumberOfFragments, 578 HoareAnnotationTreeSize, 49 FomulaSimplifications, 4504 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 38 FomulaSimplificationsInter, 178 FormulaSimplificationTreeSizeReductionInter, 0.4s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.7s InterpolantComputationTime, 299 NumberOfCodeBlocks, 299 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 291 ConstructedInterpolants, 0 QuantifiedInterpolants, 42279 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 8 InterpolantComputations, 4 PerfectInterpolantSequences, 63/95 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...