/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.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SingleStatement --traceabstraction.use.minimal.unsat.core.enumeration false -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive/Ackermann01-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 14:54:28,188 INFO L177 SettingsManager]: Resetting all preferences to default values... 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[2020-09-24 14:54:28,233 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 14:54:28,234 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 14:54:28,235 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 14:54:28,237 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 14:54:28,238 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 14:54:28,239 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 14:54:28,241 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 14:54:28,243 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 14:54:28,245 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 14:54:28,246 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 14:54:28,247 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 14:54:28,248 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 14:54:28,254 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-09-24 14:54:28,263 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 14:54:28,264 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 14:54:28,265 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 14:54:28,266 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-09-24 14:54:28,293 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 14:54:28,294 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 14:54:28,295 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 14:54:28,295 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 14:54:28,295 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 14:54:28,296 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 14:54:28,296 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 14:54:28,296 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 14:54:28,296 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 14:54:28,296 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 14:54:28,296 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 14:54:28,297 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 14:54:28,297 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 14:54:28,297 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 14:54:28,297 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 14:54:28,297 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 14:54:28,298 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 14:54:28,298 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 14:54:28,298 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 14:54:28,298 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 14:54:28,298 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 14:54:28,299 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 14:54:28,299 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 14:54:28,299 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 14:54:28,299 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 14:54:28,299 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 14:54:28,300 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 14:54:28,300 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 14:54:28,300 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 14:54:28,300 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES 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: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SingleStatement Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> false [2020-09-24 14:54:28,821 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 14:54:28,843 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 14:54:28,847 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 14:54:28,849 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 14:54:28,850 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 14:54:28,851 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive/Ackermann01-2.c [2020-09-24 14:54:28,932 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ffcf7fdd1/9473af6f5a3c4b07b9cd7118f0b9658f/FLAGa24f9e4b2 [2020-09-24 14:54:29,474 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 14:54:29,475 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive/Ackermann01-2.c [2020-09-24 14:54:29,484 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ffcf7fdd1/9473af6f5a3c4b07b9cd7118f0b9658f/FLAGa24f9e4b2 [2020-09-24 14:54:29,825 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ffcf7fdd1/9473af6f5a3c4b07b9cd7118f0b9658f [2020-09-24 14:54:29,842 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 14:54:29,848 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 14:54:29,850 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 14:54:29,850 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 14:54:29,854 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 14:54:29,856 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 02:54:29" (1/1) ... [2020-09-24 14:54:29,860 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@63ab16d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 02:54:29, skipping insertion in model container [2020-09-24 14:54:29,860 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 02:54:29" (1/1) ... [2020-09-24 14:54:29,871 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 14:54:29,900 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 14:54:30,191 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 14:54:30,197 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 14:54:30,217 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 14:54:30,233 INFO L208 MainTranslator]: Completed translation [2020-09-24 14:54:30,233 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 02:54:30 WrapperNode [2020-09-24 14:54:30,233 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 14:54:30,234 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 14:54:30,234 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 14:54:30,234 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 14:54:30,248 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 02:54:30" (1/1) ... [2020-09-24 14:54:30,249 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 02:54:30" (1/1) ... [2020-09-24 14:54:30,255 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 02:54:30" (1/1) ... [2020-09-24 14:54:30,255 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 02:54:30" (1/1) ... [2020-09-24 14:54:30,260 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 02:54:30" (1/1) ... [2020-09-24 14:54:30,262 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 02:54:30" (1/1) ... [2020-09-24 14:54:30,264 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 02:54:30" (1/1) ... [2020-09-24 14:54:30,266 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 14:54:30,266 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 14:54:30,267 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 14:54:30,267 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 14:54:30,268 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 02:54:30" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-24 14:54:30,423 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 14:54:30,424 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 14:54:30,424 INFO L138 BoogieDeclarations]: Found implementation of procedure ackermann [2020-09-24 14:54:30,424 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 14:54:30,424 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 14:54:30,424 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-24 14:54:30,425 INFO L130 BoogieDeclarations]: Found specification of procedure ackermann [2020-09-24 14:54:30,425 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 14:54:30,425 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 14:54:30,425 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 14:54:30,688 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 14:54:30,689 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-09-24 14:54:30,695 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 02:54:30 BoogieIcfgContainer [2020-09-24 14:54:30,695 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 14:54:30,709 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 14:54:30,709 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 14:54:30,719 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 14:54:30,720 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 02:54:29" (1/3) ... [2020-09-24 14:54:30,720 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@591dc8fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 02:54:30, skipping insertion in model container [2020-09-24 14:54:30,722 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 02:54:30" (2/3) ... [2020-09-24 14:54:30,722 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@591dc8fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 02:54:30, skipping insertion in model container [2020-09-24 14:54:30,723 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 02:54:30" (3/3) ... [2020-09-24 14:54:30,725 INFO L109 eAbstractionObserver]: Analyzing ICFG Ackermann01-2.c [2020-09-24 14:54:30,737 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 14:54:30,747 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 14:54:30,770 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 14:54:30,812 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 14:54:30,812 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 14:54:30,813 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 14:54:30,813 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 14:54:30,813 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 14:54:30,813 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 14:54:30,813 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 14:54:30,813 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 14:54:30,835 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2020-09-24 14:54:30,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-24 14:54:30,843 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:54:30,845 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 14:54:30,845 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:54:30,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:54:30,851 INFO L82 PathProgramCache]: Analyzing trace with hash -852610024, now seen corresponding path program 1 times [2020-09-24 14:54:30,860 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:54:30,861 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [854016064] [2020-09-24 14:54:30,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:54:30,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:31,100 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:54:31,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:31,107 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-24 14:54:31,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:31,209 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 14:54:31,210 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [854016064] [2020-09-24 14:54:31,212 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 14:54:31,212 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-09-24 14:54:31,214 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160440746] [2020-09-24 14:54:31,219 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-24 14:54:31,220 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:54:31,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-24 14:54:31,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-09-24 14:54:31,239 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 7 states. [2020-09-24 14:54:31,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:54:31,475 INFO L93 Difference]: Finished difference Result 61 states and 71 transitions. [2020-09-24 14:54:31,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-24 14:54:31,477 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 24 [2020-09-24 14:54:31,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:54:31,491 INFO L225 Difference]: With dead ends: 61 [2020-09-24 14:54:31,491 INFO L226 Difference]: Without dead ends: 39 [2020-09-24 14:54:31,495 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2020-09-24 14:54:31,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-09-24 14:54:31,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-09-24 14:54:31,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-09-24 14:54:31,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 45 transitions. [2020-09-24 14:54:31,555 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 45 transitions. Word has length 24 [2020-09-24 14:54:31,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:54:31,555 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 45 transitions. [2020-09-24 14:54:31,556 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-24 14:54:31,556 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 45 transitions. [2020-09-24 14:54:31,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-09-24 14:54:31,559 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:54:31,559 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 14:54:31,560 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 14:54:31,560 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:54:31,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:54:31,561 INFO L82 PathProgramCache]: Analyzing trace with hash 1574290279, now seen corresponding path program 1 times [2020-09-24 14:54:31,561 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:54:31,562 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [224436822] [2020-09-24 14:54:31,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:54:31,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:31,630 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:54:31,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:31,634 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-24 14:54:31,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:31,715 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-24 14:54:31,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:31,804 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-09-24 14:54:31,804 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [224436822] [2020-09-24 14:54:31,805 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 14:54:31,805 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-09-24 14:54:31,805 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851561073] [2020-09-24 14:54:31,810 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-24 14:54:31,811 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:54:31,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-24 14:54:31,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-09-24 14:54:31,812 INFO L87 Difference]: Start difference. First operand 39 states and 45 transitions. Second operand 8 states. [2020-09-24 14:54:32,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:54:32,074 INFO L93 Difference]: Finished difference Result 50 states and 58 transitions. [2020-09-24 14:54:32,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-24 14:54:32,075 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 34 [2020-09-24 14:54:32,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:54:32,077 INFO L225 Difference]: With dead ends: 50 [2020-09-24 14:54:32,077 INFO L226 Difference]: Without dead ends: 44 [2020-09-24 14:54:32,078 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2020-09-24 14:54:32,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-09-24 14:54:32,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 42. [2020-09-24 14:54:32,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-09-24 14:54:32,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 48 transitions. [2020-09-24 14:54:32,089 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 48 transitions. Word has length 34 [2020-09-24 14:54:32,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:54:32,090 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 48 transitions. [2020-09-24 14:54:32,090 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-24 14:54:32,090 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 48 transitions. [2020-09-24 14:54:32,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-09-24 14:54:32,093 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:54:32,093 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 14:54:32,093 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 14:54:32,093 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:54:32,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:54:32,094 INFO L82 PathProgramCache]: Analyzing trace with hash 2094172607, now seen corresponding path program 1 times [2020-09-24 14:54:32,094 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:54:32,095 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1805563055] [2020-09-24 14:54:32,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:54:32,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:32,170 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:54:32,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:32,175 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-24 14:54:32,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:32,214 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-24 14:54:32,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:32,235 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-24 14:54:32,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:32,246 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-09-24 14:54:32,247 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1805563055] [2020-09-24 14:54:32,247 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 14:54:32,248 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-24 14:54:32,248 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989136731] [2020-09-24 14:54:32,249 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 14:54:32,249 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:54:32,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 14:54:32,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-24 14:54:32,250 INFO L87 Difference]: Start difference. First operand 42 states and 48 transitions. Second operand 5 states. [2020-09-24 14:54:32,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:54:32,318 INFO L93 Difference]: Finished difference Result 73 states and 90 transitions. [2020-09-24 14:54:32,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-24 14:54:32,319 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 43 [2020-09-24 14:54:32,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:54:32,321 INFO L225 Difference]: With dead ends: 73 [2020-09-24 14:54:32,321 INFO L226 Difference]: Without dead ends: 44 [2020-09-24 14:54:32,323 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-09-24 14:54:32,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-09-24 14:54:32,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2020-09-24 14:54:32,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-09-24 14:54:32,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 51 transitions. [2020-09-24 14:54:32,333 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 51 transitions. Word has length 43 [2020-09-24 14:54:32,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:54:32,334 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 51 transitions. [2020-09-24 14:54:32,334 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-24 14:54:32,334 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 51 transitions. [2020-09-24 14:54:32,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-09-24 14:54:32,337 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:54:32,337 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 14:54:32,337 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-24 14:54:32,338 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:54:32,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:54:32,338 INFO L82 PathProgramCache]: Analyzing trace with hash 1685750542, now seen corresponding path program 1 times [2020-09-24 14:54:32,339 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:54:32,339 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1862067863] [2020-09-24 14:54:32,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:54:32,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:32,405 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:54:32,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:32,408 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-24 14:54:32,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:32,462 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-24 14:54:32,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:32,498 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-24 14:54:32,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:32,550 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-09-24 14:54:32,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:32,596 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 14 proven. 4 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-09-24 14:54:32,597 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1862067863] [2020-09-24 14:54:32,597 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 14:54:32,597 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-09-24 14:54:32,598 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700540610] [2020-09-24 14:54:32,598 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-24 14:54:32,599 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:54:32,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-24 14:54:32,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2020-09-24 14:54:32,600 INFO L87 Difference]: Start difference. First operand 44 states and 51 transitions. Second operand 13 states. [2020-09-24 14:54:33,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:54:33,229 INFO L93 Difference]: Finished difference Result 87 states and 120 transitions. [2020-09-24 14:54:33,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-24 14:54:33,229 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 53 [2020-09-24 14:54:33,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:54:33,232 INFO L225 Difference]: With dead ends: 87 [2020-09-24 14:54:33,233 INFO L226 Difference]: Without dead ends: 81 [2020-09-24 14:54:33,234 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=156, Invalid=600, Unknown=0, NotChecked=0, Total=756 [2020-09-24 14:54:33,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-09-24 14:54:33,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 57. [2020-09-24 14:54:33,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-09-24 14:54:33,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 74 transitions. [2020-09-24 14:54:33,253 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 74 transitions. Word has length 53 [2020-09-24 14:54:33,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:54:33,254 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 74 transitions. [2020-09-24 14:54:33,254 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-24 14:54:33,254 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 74 transitions. [2020-09-24 14:54:33,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-09-24 14:54:33,261 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:54:33,261 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 14:54:33,261 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-24 14:54:33,261 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:54:33,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:54:33,266 INFO L82 PathProgramCache]: Analyzing trace with hash 358541405, now seen corresponding path program 2 times [2020-09-24 14:54:33,266 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:54:33,266 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1854722777] [2020-09-24 14:54:33,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:54:33,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:33,342 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:54:33,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:33,348 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-24 14:54:33,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:33,390 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-24 14:54:33,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:33,416 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-24 14:54:33,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:33,433 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-09-24 14:54:33,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:33,452 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-24 14:54:33,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:33,465 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 20 proven. 11 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2020-09-24 14:54:33,466 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1854722777] [2020-09-24 14:54:33,466 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 14:54:33,466 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-24 14:54:33,467 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35602366] [2020-09-24 14:54:33,467 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-24 14:54:33,468 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:54:33,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-24 14:54:33,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-09-24 14:54:33,468 INFO L87 Difference]: Start difference. First operand 57 states and 74 transitions. Second operand 7 states. [2020-09-24 14:54:33,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:54:33,595 INFO L93 Difference]: Finished difference Result 125 states and 192 transitions. [2020-09-24 14:54:33,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-24 14:54:33,596 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 63 [2020-09-24 14:54:33,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:54:33,599 INFO L225 Difference]: With dead ends: 125 [2020-09-24 14:54:33,599 INFO L226 Difference]: Without dead ends: 81 [2020-09-24 14:54:33,601 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2020-09-24 14:54:33,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-09-24 14:54:33,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2020-09-24 14:54:33,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-09-24 14:54:33,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 110 transitions. [2020-09-24 14:54:33,616 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 110 transitions. Word has length 63 [2020-09-24 14:54:33,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:54:33,617 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 110 transitions. [2020-09-24 14:54:33,617 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-24 14:54:33,617 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 110 transitions. [2020-09-24 14:54:33,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-09-24 14:54:33,620 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:54:33,620 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 14:54:33,621 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-24 14:54:33,621 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:54:33,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:54:33,622 INFO L82 PathProgramCache]: Analyzing trace with hash 1096450289, now seen corresponding path program 3 times [2020-09-24 14:54:33,622 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:54:33,622 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1331376309] [2020-09-24 14:54:33,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:54:33,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:33,669 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:54:33,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:33,671 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-24 14:54:33,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:33,738 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-24 14:54:33,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:33,784 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-24 14:54:33,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:33,817 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-24 14:54:33,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:33,861 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-09-24 14:54:33,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:33,899 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 23 proven. 6 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2020-09-24 14:54:33,900 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1331376309] [2020-09-24 14:54:33,900 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 14:54:33,900 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-09-24 14:54:33,901 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616343278] [2020-09-24 14:54:33,901 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-24 14:54:33,901 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:54:33,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-24 14:54:33,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2020-09-24 14:54:33,902 INFO L87 Difference]: Start difference. First operand 81 states and 110 transitions. Second operand 14 states. [2020-09-24 14:54:34,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:54:34,604 INFO L93 Difference]: Finished difference Result 154 states and 245 transitions. [2020-09-24 14:54:34,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-24 14:54:34,606 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 63 [2020-09-24 14:54:34,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:54:34,614 INFO L225 Difference]: With dead ends: 154 [2020-09-24 14:54:34,614 INFO L226 Difference]: Without dead ends: 148 [2020-09-24 14:54:34,615 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=183, Invalid=747, Unknown=0, NotChecked=0, Total=930 [2020-09-24 14:54:34,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-09-24 14:54:34,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 79. [2020-09-24 14:54:34,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-09-24 14:54:34,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 104 transitions. [2020-09-24 14:54:34,640 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 104 transitions. Word has length 63 [2020-09-24 14:54:34,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:54:34,641 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 104 transitions. [2020-09-24 14:54:34,641 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-24 14:54:34,641 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 104 transitions. [2020-09-24 14:54:34,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-09-24 14:54:34,645 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:54:34,645 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 5, 4, 4, 4, 4, 4, 4, 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] [2020-09-24 14:54:34,645 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-24 14:54:34,646 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:54:34,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:54:34,646 INFO L82 PathProgramCache]: Analyzing trace with hash -1532001025, now seen corresponding path program 4 times [2020-09-24 14:54:34,646 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:54:34,647 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [344289781] [2020-09-24 14:54:34,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:54:34,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:34,676 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:54:34,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:34,677 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-24 14:54:34,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:34,691 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-24 14:54:34,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:34,700 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-24 14:54:34,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:34,719 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-24 14:54:34,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:34,725 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-09-24 14:54:34,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:34,733 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-24 14:54:34,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:34,738 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-24 14:54:34,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:34,747 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 24 proven. 32 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2020-09-24 14:54:34,748 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [344289781] [2020-09-24 14:54:34,748 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 14:54:34,748 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-09-24 14:54:34,748 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807170377] [2020-09-24 14:54:34,749 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-24 14:54:34,750 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:54:34,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-24 14:54:34,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-24 14:54:34,750 INFO L87 Difference]: Start difference. First operand 79 states and 104 transitions. Second operand 4 states. [2020-09-24 14:54:34,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:54:34,792 INFO L93 Difference]: Finished difference Result 144 states and 218 transitions. [2020-09-24 14:54:34,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-24 14:54:34,793 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 83 [2020-09-24 14:54:34,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:54:34,795 INFO L225 Difference]: With dead ends: 144 [2020-09-24 14:54:34,795 INFO L226 Difference]: Without dead ends: 78 [2020-09-24 14:54:34,796 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-24 14:54:34,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-09-24 14:54:34,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2020-09-24 14:54:34,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-09-24 14:54:34,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 104 transitions. [2020-09-24 14:54:34,809 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 104 transitions. Word has length 83 [2020-09-24 14:54:34,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:54:34,810 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 104 transitions. [2020-09-24 14:54:34,810 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-24 14:54:34,810 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 104 transitions. [2020-09-24 14:54:34,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-09-24 14:54:34,812 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:54:34,812 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 5, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2020-09-24 14:54:34,812 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-24 14:54:34,812 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:54:34,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:54:34,813 INFO L82 PathProgramCache]: Analyzing trace with hash 990403329, now seen corresponding path program 5 times [2020-09-24 14:54:34,813 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:54:34,813 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1942894444] [2020-09-24 14:54:34,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:54:34,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:34,870 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:54:34,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:34,872 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-24 14:54:34,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:34,913 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-24 14:54:34,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:34,955 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-24 14:54:34,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:35,020 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-24 14:54:35,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:35,054 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-24 14:54:35,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:35,111 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-09-24 14:54:35,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:35,159 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-09-24 14:54:35,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:35,188 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-24 14:54:35,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:35,216 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 60 proven. 35 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2020-09-24 14:54:35,217 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1942894444] [2020-09-24 14:54:35,217 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 14:54:35,217 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-09-24 14:54:35,218 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208599125] [2020-09-24 14:54:35,218 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-24 14:54:35,219 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:54:35,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-24 14:54:35,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2020-09-24 14:54:35,220 INFO L87 Difference]: Start difference. First operand 78 states and 104 transitions. Second operand 16 states. [2020-09-24 14:54:35,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:54:35,993 INFO L93 Difference]: Finished difference Result 145 states and 234 transitions. [2020-09-24 14:54:35,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-24 14:54:35,994 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 92 [2020-09-24 14:54:35,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:54:35,995 INFO L225 Difference]: With dead ends: 145 [2020-09-24 14:54:35,995 INFO L226 Difference]: Without dead ends: 0 [2020-09-24 14:54:35,998 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=301, Invalid=1181, Unknown=0, NotChecked=0, Total=1482 [2020-09-24 14:54:35,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-09-24 14:54:35,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-09-24 14:54:35,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-09-24 14:54:35,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-09-24 14:54:35,999 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 92 [2020-09-24 14:54:36,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:54:36,000 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-09-24 14:54:36,000 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-24 14:54:36,000 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-09-24 14:54:36,000 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-09-24 14:54:36,001 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-24 14:54:36,004 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-09-24 14:54:36,628 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 25 [2020-09-24 14:54:36,683 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-09-24 14:54:36,684 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-09-24 14:54:36,684 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-09-24 14:54:36,684 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-09-24 14:54:36,684 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-09-24 14:54:36,685 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-09-24 14:54:36,685 INFO L268 CegarLoopResult]: For program point ackermannEXIT(lines 15 23) no Hoare annotation was computed. [2020-09-24 14:54:36,685 INFO L264 CegarLoopResult]: At program point L22(line 22) the Hoare annotation is: (and (not (= ackermann_~m 0)) (= ackermann_~m |ackermann_#in~m|) (= ackermann_~n |ackermann_#in~n|)) [2020-09-24 14:54:36,685 INFO L271 CegarLoopResult]: At program point ackermannENTRY(lines 15 23) the Hoare annotation is: true [2020-09-24 14:54:36,686 INFO L268 CegarLoopResult]: For program point L22-1(line 22) no Hoare annotation was computed. [2020-09-24 14:54:36,686 INFO L264 CegarLoopResult]: At program point L20(line 20) the Hoare annotation is: (and (= |ackermann_#in~n| 0) (not (= ackermann_~m 0)) (= ackermann_~m |ackermann_#in~m|) (= ackermann_~n |ackermann_#in~n|)) [2020-09-24 14:54:36,686 INFO L264 CegarLoopResult]: At program point L22-2(line 22) the Hoare annotation is: (let ((.cse0 (<= 3 |ackermann_#t~ret1|))) (and (let ((.cse3 (= ackermann_~n |ackermann_#in~n|)) (.cse1 (<= 1 |ackermann_#in~m|)) (.cse2 (= ackermann_~m |ackermann_#in~m|))) (or (and .cse0 .cse1 .cse2 .cse3) (and (<= 2 |ackermann_#t~ret1|) (<= ackermann_~m 1) .cse3 .cse1 .cse2))) (or (= |ackermann_#in~n| 1) .cse0 (and (<= 2 |ackermann_#res|) (<= (+ |ackermann_#in~n| 1) |ackermann_#res|))))) [2020-09-24 14:54:36,686 INFO L268 CegarLoopResult]: For program point L19(lines 19 21) no Hoare annotation was computed. [2020-09-24 14:54:36,687 INFO L268 CegarLoopResult]: For program point L20-1(line 20) no Hoare annotation was computed. [2020-09-24 14:54:36,687 INFO L268 CegarLoopResult]: For program point L22-3(line 22) no Hoare annotation was computed. [2020-09-24 14:54:36,687 INFO L268 CegarLoopResult]: For program point L20-2(line 20) no Hoare annotation was computed. [2020-09-24 14:54:36,687 INFO L268 CegarLoopResult]: For program point L22-4(line 22) no Hoare annotation was computed. [2020-09-24 14:54:36,687 INFO L268 CegarLoopResult]: For program point L17(line 17) no Hoare annotation was computed. [2020-09-24 14:54:36,687 INFO L268 CegarLoopResult]: For program point L20-3(line 20) no Hoare annotation was computed. [2020-09-24 14:54:36,687 INFO L268 CegarLoopResult]: For program point L22-5(line 22) no Hoare annotation was computed. [2020-09-24 14:54:36,688 INFO L268 CegarLoopResult]: For program point L16(lines 16 18) no Hoare annotation was computed. [2020-09-24 14:54:36,688 INFO L268 CegarLoopResult]: For program point L22-6(line 22) no Hoare annotation was computed. [2020-09-24 14:54:36,688 INFO L268 CegarLoopResult]: For program point L15(lines 15 23) no Hoare annotation was computed. [2020-09-24 14:54:36,688 INFO L268 CegarLoopResult]: For program point ackermannFINAL(lines 15 23) no Hoare annotation was computed. [2020-09-24 14:54:36,688 INFO L268 CegarLoopResult]: For program point L33(line 33) no Hoare annotation was computed. [2020-09-24 14:54:36,688 INFO L268 CegarLoopResult]: For program point L33-1(line 33) no Hoare annotation was computed. [2020-09-24 14:54:36,689 INFO L268 CegarLoopResult]: For program point L31(line 31) no Hoare annotation was computed. [2020-09-24 14:54:36,689 INFO L268 CegarLoopResult]: For program point L33-2(line 33) no Hoare annotation was computed. [2020-09-24 14:54:36,689 INFO L268 CegarLoopResult]: For program point L27(line 27) no Hoare annotation was computed. [2020-09-24 14:54:36,689 INFO L268 CegarLoopResult]: For program point L27-1(line 27) no Hoare annotation was computed. [2020-09-24 14:54:36,689 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 26 46) no Hoare annotation was computed. [2020-09-24 14:54:36,690 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 26 46) no Hoare annotation was computed. [2020-09-24 14:54:36,690 INFO L268 CegarLoopResult]: For program point L44(line 44) no Hoare annotation was computed. [2020-09-24 14:54:36,690 INFO L268 CegarLoopResult]: For program point L42(line 42) no Hoare annotation was computed. [2020-09-24 14:54:36,690 INFO L264 CegarLoopResult]: At program point L40(line 40) the Hoare annotation is: (<= 0 main_~n~0) [2020-09-24 14:54:36,690 INFO L268 CegarLoopResult]: For program point L40-1(line 40) no Hoare annotation was computed. [2020-09-24 14:54:36,690 INFO L268 CegarLoopResult]: For program point L38(line 38) no Hoare annotation was computed. [2020-09-24 14:54:36,691 INFO L268 CegarLoopResult]: For program point L40-2(line 40) no Hoare annotation was computed. [2020-09-24 14:54:36,691 INFO L268 CegarLoopResult]: For program point L40-3(line 40) no Hoare annotation was computed. [2020-09-24 14:54:36,691 INFO L268 CegarLoopResult]: For program point L34(lines 34 39) no Hoare annotation was computed. [2020-09-24 14:54:36,691 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 44) no Hoare annotation was computed. [2020-09-24 14:54:36,691 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 26 46) the Hoare annotation is: true [2020-09-24 14:54:36,691 INFO L268 CegarLoopResult]: For program point L28(lines 28 32) no Hoare annotation was computed. [2020-09-24 14:54:36,692 INFO L268 CegarLoopResult]: For program point L41(lines 41 45) no Hoare annotation was computed. [2020-09-24 14:54:36,700 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.09 02:54:36 BoogieIcfgContainer [2020-09-24 14:54:36,701 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-24 14:54:36,704 INFO L168 Benchmark]: Toolchain (without parser) took 6859.44 ms. Allocated memory was 139.5 MB in the beginning and 287.8 MB in the end (delta: 148.4 MB). Free memory was 103.3 MB in the beginning and 202.0 MB in the end (delta: -98.7 MB). Peak memory consumption was 155.1 MB. Max. memory is 7.1 GB. [2020-09-24 14:54:36,704 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 139.5 MB. Free memory was 121.0 MB in the beginning and 120.8 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-24 14:54:36,705 INFO L168 Benchmark]: CACSL2BoogieTranslator took 384.20 ms. Allocated memory is still 139.5 MB. Free memory was 102.9 MB in the beginning and 93.3 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. [2020-09-24 14:54:36,706 INFO L168 Benchmark]: Boogie Preprocessor took 31.87 ms. Allocated memory is still 139.5 MB. Free memory was 93.3 MB in the beginning and 92.0 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. [2020-09-24 14:54:36,707 INFO L168 Benchmark]: RCFGBuilder took 428.64 ms. Allocated memory was 139.5 MB in the beginning and 201.9 MB in the end (delta: 62.4 MB). Free memory was 92.0 MB in the beginning and 166.6 MB in the end (delta: -74.7 MB). Peak memory consumption was 12.4 MB. Max. memory is 7.1 GB. [2020-09-24 14:54:36,708 INFO L168 Benchmark]: TraceAbstraction took 5992.00 ms. Allocated memory was 201.9 MB in the beginning and 287.8 MB in the end (delta: 86.0 MB). Free memory was 166.6 MB in the beginning and 202.0 MB in the end (delta: -35.4 MB). Peak memory consumption was 156.0 MB. Max. memory is 7.1 GB. [2020-09-24 14:54:36,712 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 139.5 MB. Free memory was 121.0 MB in the beginning and 120.8 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 384.20 ms. Allocated memory is still 139.5 MB. Free memory was 102.9 MB in the beginning and 93.3 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 31.87 ms. Allocated memory is still 139.5 MB. Free memory was 93.3 MB in the beginning and 92.0 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 428.64 ms. Allocated memory was 139.5 MB in the beginning and 201.9 MB in the end (delta: 62.4 MB). Free memory was 92.0 MB in the beginning and 166.6 MB in the end (delta: -74.7 MB). Peak memory consumption was 12.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 5992.00 ms. Allocated memory was 201.9 MB in the beginning and 287.8 MB in the end (delta: 86.0 MB). Free memory was 166.6 MB in the beginning and 202.0 MB in the end (delta: -35.4 MB). Peak memory consumption was 156.0 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 44]: 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 - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 44 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 5.1s, OverallIterations: 8, TraceHistogramMax: 8, AutomataDifference: 2.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.6s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 289 SDtfs, 339 SDslu, 1271 SDs, 0 SdLazy, 1396 SolverSat, 226 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 245 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 465 ImplicationChecksByTransitivity, 1.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=81occurred 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: 0.1s AutomataMinimizationTime, 8 MinimizatonAttempts, 95 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 9 LocationsWithAnnotation, 125 PreInvPairs, 154 NumberOfFragments, 80 HoareAnnotationTreeSize, 125 FomulaSimplifications, 7684 FormulaSimplificationTreeSizeReduction, 0.4s HoareSimplificationTime, 9 FomulaSimplificationsInter, 304 FormulaSimplificationTreeSizeReductionInter, 0.2s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.6s InterpolantComputationTime, 455 NumberOfCodeBlocks, 455 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 447 ConstructedInterpolants, 0 QuantifiedInterpolants, 54551 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 8 InterpolantComputations, 2 PerfectInterpolantSequences, 388/481 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...