/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 CAMEL_NO_AM -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive/Ackermann04.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-79ed534 [2020-07-19 21:12:44,861 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-19 21:12:44,863 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-19 21:12:44,875 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-19 21:12:44,876 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-19 21:12:44,877 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-19 21:12:44,878 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-19 21:12:44,880 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-19 21:12:44,881 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-19 21:12:44,882 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-19 21:12:44,883 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-19 21:12:44,884 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-19 21:12:44,885 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-19 21:12:44,889 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-19 21:12:44,890 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-19 21:12:44,892 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-19 21:12:44,892 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-19 21:12:44,893 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-19 21:12:44,895 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-19 21:12:44,900 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-19 21:12:44,904 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-19 21:12:44,905 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-19 21:12:44,906 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-19 21:12:44,906 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-19 21:12:44,911 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-19 21:12:44,924 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-19 21:12:44,924 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-19 21:12:44,926 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-19 21:12:44,927 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-19 21:12:44,961 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-19 21:12:44,962 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-19 21:12:44,965 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-19 21:12:44,966 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-19 21:12:44,966 INFO L138 SettingsManager]: * Use SBE=true [2020-07-19 21:12:44,966 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-19 21:12:44,966 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-19 21:12:44,967 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-19 21:12:44,967 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-19 21:12:44,967 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-19 21:12:44,968 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-19 21:12:44,968 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-19 21:12:44,969 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-19 21:12:44,969 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-19 21:12:44,969 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-19 21:12:44,969 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-19 21:12:44,969 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-19 21:12:44,970 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-19 21:12:44,970 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-19 21:12:44,970 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-19 21:12:44,970 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-19 21:12:44,971 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-19 21:12:44,971 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-19 21:12:44,971 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-19 21:12:44,971 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-19 21:12:44,971 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-19 21:12:44,972 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-19 21:12:44,972 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-19 21:12:44,972 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-19 21:12:44,972 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> CAMEL_NO_AM [2020-07-19 21:12:45,269 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-19 21:12:45,287 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-19 21:12:45,291 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-19 21:12:45,293 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-19 21:12:45,294 INFO L275 PluginConnector]: CDTParser initialized [2020-07-19 21:12:45,294 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive/Ackermann04.c [2020-07-19 21:12:45,362 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6b627a592/3652725f2eae44159074410111dc3e6f/FLAGbe4a8f1ca [2020-07-19 21:12:45,831 INFO L306 CDTParser]: Found 1 translation units. [2020-07-19 21:12:45,831 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive/Ackermann04.c [2020-07-19 21:12:45,838 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6b627a592/3652725f2eae44159074410111dc3e6f/FLAGbe4a8f1ca [2020-07-19 21:12:46,187 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6b627a592/3652725f2eae44159074410111dc3e6f [2020-07-19 21:12:46,196 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-19 21:12:46,199 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-19 21:12:46,200 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-19 21:12:46,200 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-19 21:12:46,203 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-19 21:12:46,204 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 09:12:46" (1/1) ... [2020-07-19 21:12:46,207 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@62a47b08 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:12:46, skipping insertion in model container [2020-07-19 21:12:46,207 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 09:12:46" (1/1) ... [2020-07-19 21:12:46,215 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-19 21:12:46,231 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-19 21:12:46,403 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-19 21:12:46,407 INFO L203 MainTranslator]: Completed pre-run [2020-07-19 21:12:46,425 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-19 21:12:46,439 INFO L208 MainTranslator]: Completed translation [2020-07-19 21:12:46,440 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:12:46 WrapperNode [2020-07-19 21:12:46,440 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-19 21:12:46,441 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-19 21:12:46,441 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-19 21:12:46,441 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-19 21:12:46,454 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:12:46" (1/1) ... [2020-07-19 21:12:46,454 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:12:46" (1/1) ... [2020-07-19 21:12:46,459 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:12:46" (1/1) ... [2020-07-19 21:12:46,459 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:12:46" (1/1) ... [2020-07-19 21:12:46,463 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:12:46" (1/1) ... [2020-07-19 21:12:46,465 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:12:46" (1/1) ... [2020-07-19 21:12:46,466 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:12:46" (1/1) ... [2020-07-19 21:12:46,467 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-19 21:12:46,468 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-19 21:12:46,468 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-19 21:12:46,468 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-19 21:12:46,469 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:12:46" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-19 21:12:46,626 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-19 21:12:46,627 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-19 21:12:46,627 INFO L138 BoogieDeclarations]: Found implementation of procedure ackermann [2020-07-19 21:12:46,627 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-19 21:12:46,627 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-19 21:12:46,627 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-19 21:12:46,627 INFO L130 BoogieDeclarations]: Found specification of procedure ackermann [2020-07-19 21:12:46,628 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-19 21:12:46,628 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-19 21:12:46,628 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-19 21:12:46,824 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-19 21:12:46,824 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-19 21:12:46,828 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 09:12:46 BoogieIcfgContainer [2020-07-19 21:12:46,828 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-19 21:12:46,830 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-19 21:12:46,830 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-19 21:12:46,833 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-19 21:12:46,833 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.07 09:12:46" (1/3) ... [2020-07-19 21:12:46,834 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60093ad7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 09:12:46, skipping insertion in model container [2020-07-19 21:12:46,834 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:12:46" (2/3) ... [2020-07-19 21:12:46,835 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60093ad7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 09:12:46, skipping insertion in model container [2020-07-19 21:12:46,835 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 09:12:46" (3/3) ... [2020-07-19 21:12:46,836 INFO L109 eAbstractionObserver]: Analyzing ICFG Ackermann04.c [2020-07-19 21:12:46,847 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-19 21:12:46,854 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-19 21:12:46,865 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-19 21:12:46,886 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-19 21:12:46,886 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-19 21:12:46,887 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-19 21:12:46,887 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-19 21:12:46,887 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-19 21:12:46,887 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-19 21:12:46,887 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-19 21:12:46,887 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-19 21:12:46,904 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states. [2020-07-19 21:12:46,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-07-19 21:12:46,911 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:12:46,912 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:12:46,912 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:12:46,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:12:46,919 INFO L82 PathProgramCache]: Analyzing trace with hash -1796234678, now seen corresponding path program 1 times [2020-07-19 21:12:46,928 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:12:46,928 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175284701] [2020-07-19 21:12:46,928 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@48b60943 [2020-07-19 21:12:47,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:12:47,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:12:47,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:12:47,131 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 21:12:47,132 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175284701] [2020-07-19 21:12:47,133 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-19 21:12:47,133 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-19 21:12:47,134 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871362685] [2020-07-19 21:12:47,140 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-19 21:12:47,140 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:12:47,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-19 21:12:47,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-19 21:12:47,158 INFO L87 Difference]: Start difference. First operand 27 states. Second operand 5 states. [2020-07-19 21:12:47,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:12:47,380 INFO L93 Difference]: Finished difference Result 55 states and 77 transitions. [2020-07-19 21:12:47,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-19 21:12:47,382 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2020-07-19 21:12:47,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:12:47,399 INFO L225 Difference]: With dead ends: 55 [2020-07-19 21:12:47,399 INFO L226 Difference]: Without dead ends: 28 [2020-07-19 21:12:47,404 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-19 21:12:47,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-07-19 21:12:47,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-07-19 21:12:47,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-07-19 21:12:47,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 35 transitions. [2020-07-19 21:12:47,446 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 35 transitions. Word has length 15 [2020-07-19 21:12:47,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:12:47,447 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 35 transitions. [2020-07-19 21:12:47,447 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-19 21:12:47,447 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 35 transitions. [2020-07-19 21:12:47,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-07-19 21:12:47,450 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:12:47,450 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] [2020-07-19 21:12:47,451 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-19 21:12:47,451 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:12:47,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:12:47,452 INFO L82 PathProgramCache]: Analyzing trace with hash -895156504, now seen corresponding path program 1 times [2020-07-19 21:12:47,452 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:12:47,453 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390184104] [2020-07-19 21:12:47,453 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@48b60943 [2020-07-19 21:12:47,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:12:47,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:12:47,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:12:47,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:12:47,564 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-19 21:12:47,565 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390184104] [2020-07-19 21:12:47,566 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [516222361] [2020-07-19 21:12:47,566 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@48b60943 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:12:47,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:12:47,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-19 21:12:47,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:12:47,690 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-19 21:12:47,690 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:12:47,691 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2020-07-19 21:12:47,692 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920137539] [2020-07-19 21:12:47,693 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-19 21:12:47,693 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:12:47,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-19 21:12:47,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-07-19 21:12:47,694 INFO L87 Difference]: Start difference. First operand 28 states and 35 transitions. Second operand 7 states. [2020-07-19 21:12:47,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:12:47,817 INFO L93 Difference]: Finished difference Result 52 states and 77 transitions. [2020-07-19 21:12:47,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-19 21:12:47,818 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 22 [2020-07-19 21:12:47,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:12:47,821 INFO L225 Difference]: With dead ends: 52 [2020-07-19 21:12:47,821 INFO L226 Difference]: Without dead ends: 30 [2020-07-19 21:12:47,823 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-07-19 21:12:47,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-07-19 21:12:47,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-07-19 21:12:47,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-07-19 21:12:47,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 39 transitions. [2020-07-19 21:12:47,842 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 39 transitions. Word has length 22 [2020-07-19 21:12:47,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:12:47,844 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 39 transitions. [2020-07-19 21:12:47,844 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-19 21:12:47,845 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 39 transitions. [2020-07-19 21:12:47,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-07-19 21:12:47,849 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:12:47,850 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-07-19 21:12:48,050 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-07-19 21:12:48,051 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:12:48,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:12:48,053 INFO L82 PathProgramCache]: Analyzing trace with hash 718507263, now seen corresponding path program 1 times [2020-07-19 21:12:48,053 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:12:48,054 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373816120] [2020-07-19 21:12:48,054 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@48b60943 [2020-07-19 21:12:48,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:12:48,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:12:48,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:12:48,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:12:48,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:12:48,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:12:48,215 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-07-19 21:12:48,215 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373816120] [2020-07-19 21:12:48,216 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1007587713] [2020-07-19 21:12:48,216 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@48b60943 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:12:48,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:12:48,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-19 21:12:48,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:12:48,310 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-07-19 21:12:48,310 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:12:48,310 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2020-07-19 21:12:48,311 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890238304] [2020-07-19 21:12:48,311 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-19 21:12:48,312 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:12:48,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-19 21:12:48,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-07-19 21:12:48,312 INFO L87 Difference]: Start difference. First operand 30 states and 39 transitions. Second operand 8 states. [2020-07-19 21:12:48,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:12:48,511 INFO L93 Difference]: Finished difference Result 77 states and 137 transitions. [2020-07-19 21:12:48,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-19 21:12:48,512 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 35 [2020-07-19 21:12:48,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:12:48,515 INFO L225 Difference]: With dead ends: 77 [2020-07-19 21:12:48,515 INFO L226 Difference]: Without dead ends: 53 [2020-07-19 21:12:48,517 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-07-19 21:12:48,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-07-19 21:12:48,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2020-07-19 21:12:48,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-07-19 21:12:48,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 79 transitions. [2020-07-19 21:12:48,532 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 79 transitions. Word has length 35 [2020-07-19 21:12:48,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:12:48,533 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 79 transitions. [2020-07-19 21:12:48,533 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-19 21:12:48,533 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 79 transitions. [2020-07-19 21:12:48,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-07-19 21:12:48,536 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:12:48,536 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:12:48,750 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:12:48,751 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:12:48,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:12:48,752 INFO L82 PathProgramCache]: Analyzing trace with hash -506207890, now seen corresponding path program 2 times [2020-07-19 21:12:48,752 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:12:48,753 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10366657] [2020-07-19 21:12:48,753 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@48b60943 [2020-07-19 21:12:48,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:12:48,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:12:48,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:12:48,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:12:48,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:12:48,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:12:49,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:12:49,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:12:49,024 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2020-07-19 21:12:49,025 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10366657] [2020-07-19 21:12:49,025 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1880060251] [2020-07-19 21:12:49,025 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@48b60943 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:12:49,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:12:49,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-19 21:12:49,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:12:49,136 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2020-07-19 21:12:49,137 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:12:49,138 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2020-07-19 21:12:49,138 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372363762] [2020-07-19 21:12:49,139 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-19 21:12:49,139 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:12:49,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-19 21:12:49,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-07-19 21:12:49,140 INFO L87 Difference]: Start difference. First operand 53 states and 79 transitions. Second operand 8 states. [2020-07-19 21:12:49,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:12:49,293 INFO L93 Difference]: Finished difference Result 123 states and 230 transitions. [2020-07-19 21:12:49,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-19 21:12:49,294 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 48 [2020-07-19 21:12:49,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:12:49,296 INFO L225 Difference]: With dead ends: 123 [2020-07-19 21:12:49,297 INFO L226 Difference]: Without dead ends: 56 [2020-07-19 21:12:49,299 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-07-19 21:12:49,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-07-19 21:12:49,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2020-07-19 21:12:49,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-07-19 21:12:49,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 79 transitions. [2020-07-19 21:12:49,313 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 79 transitions. Word has length 48 [2020-07-19 21:12:49,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:12:49,313 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 79 transitions. [2020-07-19 21:12:49,314 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-19 21:12:49,314 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 79 transitions. [2020-07-19 21:12:49,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-07-19 21:12:49,318 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:12:49,318 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 7, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:12:49,531 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:12:49,532 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:12:49,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:12:49,532 INFO L82 PathProgramCache]: Analyzing trace with hash 984881173, now seen corresponding path program 3 times [2020-07-19 21:12:49,532 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:12:49,533 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461538309] [2020-07-19 21:12:49,533 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@48b60943 [2020-07-19 21:12:49,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:12:49,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:12:49,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:12:49,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:12:49,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:12:49,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:12:49,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:12:49,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:12:49,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:12:49,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:12:49,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:12:49,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:12:49,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:12:49,988 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 101 proven. 59 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2020-07-19 21:12:49,988 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461538309] [2020-07-19 21:12:49,988 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [749354503] [2020-07-19 21:12:49,989 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@48b60943 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:12:50,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:12:50,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 17 conjunts are in the unsatisfiable core [2020-07-19 21:12:50,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:12:50,110 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 141 proven. 37 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2020-07-19 21:12:50,111 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:12:50,111 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 17 [2020-07-19 21:12:50,112 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128359326] [2020-07-19 21:12:50,112 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-19 21:12:50,113 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:12:50,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-19 21:12:50,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2020-07-19 21:12:50,113 INFO L87 Difference]: Start difference. First operand 56 states and 79 transitions. Second operand 17 states. [2020-07-19 21:12:50,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:12:50,699 INFO L93 Difference]: Finished difference Result 122 states and 225 transitions. [2020-07-19 21:12:50,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-07-19 21:12:50,702 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 82 [2020-07-19 21:12:50,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:12:50,709 INFO L225 Difference]: With dead ends: 122 [2020-07-19 21:12:50,709 INFO L226 Difference]: Without dead ends: 74 [2020-07-19 21:12:50,712 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=253, Invalid=937, Unknown=0, NotChecked=0, Total=1190 [2020-07-19 21:12:50,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-07-19 21:12:50,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 56. [2020-07-19 21:12:50,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-07-19 21:12:50,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 75 transitions. [2020-07-19 21:12:50,738 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 75 transitions. Word has length 82 [2020-07-19 21:12:50,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:12:50,739 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 75 transitions. [2020-07-19 21:12:50,739 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-19 21:12:50,739 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 75 transitions. [2020-07-19 21:12:50,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2020-07-19 21:12:50,749 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:12:50,749 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 12, 9, 8, 8, 8, 8, 8, 8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:12:50,955 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:12:50,956 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:12:50,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:12:50,957 INFO L82 PathProgramCache]: Analyzing trace with hash 1706548602, now seen corresponding path program 4 times [2020-07-19 21:12:50,957 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:12:50,958 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600588624] [2020-07-19 21:12:50,958 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@48b60943 [2020-07-19 21:12:50,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:12:51,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:12:51,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:12:51,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:12:51,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:12:51,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:12:51,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:12:51,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:12:51,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:12:51,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:12:51,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:12:51,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:12:51,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:12:51,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:12:51,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:12:51,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:12:51,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:12:51,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:12:51,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:12:51,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:12:51,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:12:51,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:12:51,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:12:51,571 INFO L134 CoverageAnalysis]: Checked inductivity of 1030 backedges. 391 proven. 197 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2020-07-19 21:12:51,572 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600588624] [2020-07-19 21:12:51,572 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1607186405] [2020-07-19 21:12:51,572 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@48b60943 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:12:51,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:12:51,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 431 conjuncts, 33 conjunts are in the unsatisfiable core [2020-07-19 21:12:51,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:12:51,768 INFO L134 CoverageAnalysis]: Checked inductivity of 1030 backedges. 367 proven. 209 refuted. 0 times theorem prover too weak. 454 trivial. 0 not checked. [2020-07-19 21:12:51,769 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:12:51,769 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 23 [2020-07-19 21:12:51,770 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324672255] [2020-07-19 21:12:51,771 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-07-19 21:12:51,771 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:12:51,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-07-19 21:12:51,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2020-07-19 21:12:51,775 INFO L87 Difference]: Start difference. First operand 56 states and 75 transitions. Second operand 23 states. [2020-07-19 21:12:53,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:12:53,223 INFO L93 Difference]: Finished difference Result 158 states and 323 transitions. [2020-07-19 21:12:53,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-07-19 21:12:53,224 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 147 [2020-07-19 21:12:53,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:12:53,227 INFO L225 Difference]: With dead ends: 158 [2020-07-19 21:12:53,228 INFO L226 Difference]: Without dead ends: 103 [2020-07-19 21:12:53,231 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 193 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 945 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=700, Invalid=3460, Unknown=0, NotChecked=0, Total=4160 [2020-07-19 21:12:53,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-07-19 21:12:53,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 70. [2020-07-19 21:12:53,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-07-19 21:12:53,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 100 transitions. [2020-07-19 21:12:53,250 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 100 transitions. Word has length 147 [2020-07-19 21:12:53,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:12:53,251 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 100 transitions. [2020-07-19 21:12:53,251 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-07-19 21:12:53,251 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 100 transitions. [2020-07-19 21:12:53,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2020-07-19 21:12:53,254 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:12:53,255 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 15, 12, 11, 11, 11, 11, 11, 11, 11, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:12:53,468 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-07-19 21:12:53,469 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:12:53,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:12:53,472 INFO L82 PathProgramCache]: Analyzing trace with hash 803602941, now seen corresponding path program 5 times [2020-07-19 21:12:53,472 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:12:53,473 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094077637] [2020-07-19 21:12:53,473 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@48b60943 [2020-07-19 21:12:53,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:12:53,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:12:53,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:12:53,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:12:53,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:12:53,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:12:53,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:12:53,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:12:53,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:12:53,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:12:53,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:12:53,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:12:53,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:12:53,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:12:53,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:12:53,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:12:53,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:12:53,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:12:53,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:12:53,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:12:53,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:12:53,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:12:53,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:12:53,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:12:53,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:12:53,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:12:53,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:12:53,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:12:53,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:12:54,068 INFO L134 CoverageAnalysis]: Checked inductivity of 1741 backedges. 258 proven. 609 refuted. 0 times theorem prover too weak. 874 trivial. 0 not checked. [2020-07-19 21:12:54,069 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094077637] [2020-07-19 21:12:54,069 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1852549738] [2020-07-19 21:12:54,069 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@48b60943 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:12:54,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:12:54,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 545 conjuncts, 25 conjunts are in the unsatisfiable core [2020-07-19 21:12:54,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:12:54,264 INFO L134 CoverageAnalysis]: Checked inductivity of 1741 backedges. 1016 proven. 196 refuted. 0 times theorem prover too weak. 529 trivial. 0 not checked. [2020-07-19 21:12:54,265 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:12:54,266 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 20 [2020-07-19 21:12:54,266 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086526702] [2020-07-19 21:12:54,268 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-19 21:12:54,268 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:12:54,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-19 21:12:54,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2020-07-19 21:12:54,269 INFO L87 Difference]: Start difference. First operand 70 states and 100 transitions. Second operand 20 states. [2020-07-19 21:12:54,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:12:54,924 INFO L93 Difference]: Finished difference Result 155 states and 271 transitions. [2020-07-19 21:12:54,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-07-19 21:12:54,926 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 186 [2020-07-19 21:12:54,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:12:54,929 INFO L225 Difference]: With dead ends: 155 [2020-07-19 21:12:54,929 INFO L226 Difference]: Without dead ends: 93 [2020-07-19 21:12:54,931 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 277 GetRequests, 242 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=248, Invalid=1084, Unknown=0, NotChecked=0, Total=1332 [2020-07-19 21:12:54,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-07-19 21:12:54,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 88. [2020-07-19 21:12:54,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-07-19 21:12:54,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 140 transitions. [2020-07-19 21:12:54,950 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 140 transitions. Word has length 186 [2020-07-19 21:12:54,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:12:54,950 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 140 transitions. [2020-07-19 21:12:54,950 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-19 21:12:54,951 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 140 transitions. [2020-07-19 21:12:54,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2020-07-19 21:12:54,954 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:12:54,954 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 16, 12, 11, 11, 11, 11, 11, 11, 11, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:12:55,168 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:12:55,169 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:12:55,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:12:55,170 INFO L82 PathProgramCache]: Analyzing trace with hash 1437968735, now seen corresponding path program 6 times [2020-07-19 21:12:55,170 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:12:55,171 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095493251] [2020-07-19 21:12:55,171 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@48b60943 [2020-07-19 21:12:55,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:12:55,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:12:55,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:12:55,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:12:55,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:12:55,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:12:55,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:12:55,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:12:55,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:12:55,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:12:55,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:12:55,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:12:55,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:12:55,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:12:55,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:12:55,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:12:55,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:12:55,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:12:55,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:12:55,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:12:55,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:12:55,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:12:55,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:12:55,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:12:55,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:12:55,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:12:55,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:12:55,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:12:55,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:12:55,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:12:55,665 INFO L134 CoverageAnalysis]: Checked inductivity of 1872 backedges. 325 proven. 607 refuted. 0 times theorem prover too weak. 940 trivial. 0 not checked. [2020-07-19 21:12:55,666 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095493251] [2020-07-19 21:12:55,666 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1736099960] [2020-07-19 21:12:55,666 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@48b60943 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:12:55,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:12:55,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 565 conjuncts, 24 conjunts are in the unsatisfiable core [2020-07-19 21:12:55,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:12:55,873 INFO L134 CoverageAnalysis]: Checked inductivity of 1872 backedges. 1060 proven. 265 refuted. 0 times theorem prover too weak. 547 trivial. 0 not checked. [2020-07-19 21:12:55,874 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:12:55,874 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 14 [2020-07-19 21:12:55,874 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133168408] [2020-07-19 21:12:55,875 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-19 21:12:55,875 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:12:55,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-19 21:12:55,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2020-07-19 21:12:55,876 INFO L87 Difference]: Start difference. First operand 88 states and 140 transitions. Second operand 14 states. [2020-07-19 21:12:56,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:12:56,166 INFO L93 Difference]: Finished difference Result 206 states and 459 transitions. [2020-07-19 21:12:56,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-19 21:12:56,168 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 193 [2020-07-19 21:12:56,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:12:56,173 INFO L225 Difference]: With dead ends: 206 [2020-07-19 21:12:56,173 INFO L226 Difference]: Without dead ends: 126 [2020-07-19 21:12:56,176 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=313, Unknown=0, NotChecked=0, Total=420 [2020-07-19 21:12:56,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-07-19 21:12:56,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 108. [2020-07-19 21:12:56,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-07-19 21:12:56,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 176 transitions. [2020-07-19 21:12:56,226 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 176 transitions. Word has length 193 [2020-07-19 21:12:56,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:12:56,226 INFO L479 AbstractCegarLoop]: Abstraction has 108 states and 176 transitions. [2020-07-19 21:12:56,226 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-19 21:12:56,227 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 176 transitions. [2020-07-19 21:12:56,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2020-07-19 21:12:56,231 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:12:56,231 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 12, 9, 8, 8, 8, 8, 8, 8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:12:56,445 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:12:56,446 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:12:56,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:12:56,446 INFO L82 PathProgramCache]: Analyzing trace with hash -1628439286, now seen corresponding path program 7 times [2020-07-19 21:12:56,446 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:12:56,447 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071220309] [2020-07-19 21:12:56,447 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@48b60943 [2020-07-19 21:12:56,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:12:56,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:12:56,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:12:56,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:12:56,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:12:56,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:12:56,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:12:56,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:12:56,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:12:56,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:12:56,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:12:56,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:12:56,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:12:56,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:12:56,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:12:56,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:12:56,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:12:56,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:12:56,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:12:56,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:12:56,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:12:56,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:12:56,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:12:56,826 INFO L134 CoverageAnalysis]: Checked inductivity of 1030 backedges. 158 proven. 354 refuted. 0 times theorem prover too weak. 518 trivial. 0 not checked. [2020-07-19 21:12:56,826 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071220309] [2020-07-19 21:12:56,826 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [990825627] [2020-07-19 21:12:56,827 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@48b60943 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:12:56,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:12:56,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 431 conjuncts, 21 conjunts are in the unsatisfiable core [2020-07-19 21:12:56,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:12:56,959 INFO L134 CoverageAnalysis]: Checked inductivity of 1030 backedges. 595 proven. 114 refuted. 0 times theorem prover too weak. 321 trivial. 0 not checked. [2020-07-19 21:12:56,960 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:12:56,960 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 18 [2020-07-19 21:12:56,960 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304979711] [2020-07-19 21:12:56,961 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-19 21:12:56,961 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:12:56,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-19 21:12:56,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2020-07-19 21:12:56,962 INFO L87 Difference]: Start difference. First operand 108 states and 176 transitions. Second operand 18 states. [2020-07-19 21:12:57,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:12:57,673 INFO L93 Difference]: Finished difference Result 225 states and 401 transitions. [2020-07-19 21:12:57,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-07-19 21:12:57,674 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 147 [2020-07-19 21:12:57,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:12:57,676 INFO L225 Difference]: With dead ends: 225 [2020-07-19 21:12:57,676 INFO L226 Difference]: Without dead ends: 120 [2020-07-19 21:12:57,679 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 191 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 371 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=360, Invalid=1446, Unknown=0, NotChecked=0, Total=1806 [2020-07-19 21:12:57,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-07-19 21:12:57,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 108. [2020-07-19 21:12:57,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-07-19 21:12:57,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 168 transitions. [2020-07-19 21:12:57,701 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 168 transitions. Word has length 147 [2020-07-19 21:12:57,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:12:57,702 INFO L479 AbstractCegarLoop]: Abstraction has 108 states and 168 transitions. [2020-07-19 21:12:57,702 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-19 21:12:57,702 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 168 transitions. [2020-07-19 21:12:57,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2020-07-19 21:12:57,706 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:12:57,706 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 14, 11, 10, 10, 10, 10, 10, 10, 10, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:12:57,919 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-07-19 21:12:57,920 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:12:57,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:12:57,920 INFO L82 PathProgramCache]: Analyzing trace with hash -66876812, now seen corresponding path program 8 times [2020-07-19 21:12:57,920 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:12:57,921 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077072597] [2020-07-19 21:12:57,921 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@48b60943 [2020-07-19 21:12:57,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:12:58,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:12:58,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:12:58,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:12:58,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:12:58,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:12:58,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:12:58,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:12:58,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:12:58,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:12:58,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:12:58,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:12:58,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:12:58,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:12:58,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:12:58,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:12:58,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:12:58,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:12:58,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:12:58,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:12:58,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:12:58,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:12:58,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:12:58,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:12:58,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:12:58,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:12:58,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:12:58,495 INFO L134 CoverageAnalysis]: Checked inductivity of 1483 backedges. 503 proven. 360 refuted. 0 times theorem prover too weak. 620 trivial. 0 not checked. [2020-07-19 21:12:58,496 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077072597] [2020-07-19 21:12:58,496 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1852889186] [2020-07-19 21:12:58,496 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@48b60943 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:12:58,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:12:58,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 507 conjuncts, 37 conjunts are in the unsatisfiable core [2020-07-19 21:12:58,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:12:58,691 INFO L134 CoverageAnalysis]: Checked inductivity of 1483 backedges. 477 proven. 372 refuted. 0 times theorem prover too weak. 634 trivial. 0 not checked. [2020-07-19 21:12:58,692 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:12:58,692 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21] total 25 [2020-07-19 21:12:58,693 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305858753] [2020-07-19 21:12:58,695 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-07-19 21:12:58,695 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:12:58,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-07-19 21:12:58,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=514, Unknown=0, NotChecked=0, Total=600 [2020-07-19 21:12:58,696 INFO L87 Difference]: Start difference. First operand 108 states and 168 transitions. Second operand 25 states. [2020-07-19 21:12:59,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:12:59,883 INFO L93 Difference]: Finished difference Result 256 states and 499 transitions. [2020-07-19 21:12:59,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-07-19 21:12:59,884 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 173 [2020-07-19 21:12:59,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:12:59,892 INFO L225 Difference]: With dead ends: 256 [2020-07-19 21:12:59,892 INFO L226 Difference]: Without dead ends: 160 [2020-07-19 21:12:59,902 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 288 GetRequests, 227 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 896 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=670, Invalid=3236, Unknown=0, NotChecked=0, Total=3906 [2020-07-19 21:12:59,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-07-19 21:12:59,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 133. [2020-07-19 21:12:59,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2020-07-19 21:12:59,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 217 transitions. [2020-07-19 21:12:59,925 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 217 transitions. Word has length 173 [2020-07-19 21:12:59,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:12:59,926 INFO L479 AbstractCegarLoop]: Abstraction has 133 states and 217 transitions. [2020-07-19 21:12:59,926 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-07-19 21:12:59,926 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 217 transitions. [2020-07-19 21:12:59,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2020-07-19 21:12:59,929 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:12:59,929 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 15, 12, 11, 11, 11, 11, 11, 11, 11, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:13:00,144 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:13:00,145 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:13:00,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:13:00,146 INFO L82 PathProgramCache]: Analyzing trace with hash -1028004289, now seen corresponding path program 9 times [2020-07-19 21:13:00,146 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:13:00,146 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328089454] [2020-07-19 21:13:00,147 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@48b60943 [2020-07-19 21:13:00,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:13:00,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:13:00,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:13:00,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:13:00,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:13:00,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:13:00,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:13:00,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:13:00,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:13:00,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:13:00,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:13:00,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:13:00,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:13:00,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:13:00,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:13:00,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:13:00,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:13:00,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:13:00,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:13:00,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:13:00,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:13:00,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:13:00,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:13:00,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:13:00,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:13:00,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:13:00,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:13:00,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:13:00,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:13:00,866 INFO L134 CoverageAnalysis]: Checked inductivity of 1741 backedges. 686 proven. 70 refuted. 0 times theorem prover too weak. 985 trivial. 0 not checked. [2020-07-19 21:13:00,867 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328089454] [2020-07-19 21:13:00,867 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [363414489] [2020-07-19 21:13:00,867 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@48b60943 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:13:00,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:13:00,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 545 conjuncts, 40 conjunts are in the unsatisfiable core [2020-07-19 21:13:00,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:13:01,043 INFO L134 CoverageAnalysis]: Checked inductivity of 1741 backedges. 657 proven. 84 refuted. 0 times theorem prover too weak. 1000 trivial. 0 not checked. [2020-07-19 21:13:01,043 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:13:01,044 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 23] total 26 [2020-07-19 21:13:01,044 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195964059] [2020-07-19 21:13:01,045 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-07-19 21:13:01,045 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:13:01,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-07-19 21:13:01,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=557, Unknown=0, NotChecked=0, Total=650 [2020-07-19 21:13:01,046 INFO L87 Difference]: Start difference. First operand 133 states and 217 transitions. Second operand 26 states. [2020-07-19 21:13:02,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:13:02,011 INFO L93 Difference]: Finished difference Result 169 states and 273 transitions. [2020-07-19 21:13:02,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-07-19 21:13:02,011 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 186 [2020-07-19 21:13:02,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:13:02,013 INFO L225 Difference]: With dead ends: 169 [2020-07-19 21:13:02,013 INFO L226 Difference]: Without dead ends: 0 [2020-07-19 21:13:02,015 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 299 GetRequests, 246 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 447 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=527, Invalid=2443, Unknown=0, NotChecked=0, Total=2970 [2020-07-19 21:13:02,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-19 21:13:02,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-19 21:13:02,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-19 21:13:02,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-19 21:13:02,016 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 186 [2020-07-19 21:13:02,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:13:02,017 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-19 21:13:02,017 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-07-19 21:13:02,017 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-19 21:13:02,017 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-19 21:13:02,229 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:13:02,233 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-19 21:13:02,922 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 135 DAG size of output: 101 [2020-07-19 21:13:03,211 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 135 DAG size of output: 101 [2020-07-19 21:13:03,323 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 135 DAG size of output: 101 [2020-07-19 21:13:03,444 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 135 DAG size of output: 101 [2020-07-19 21:13:03,583 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 135 DAG size of output: 101 [2020-07-19 21:13:03,738 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 135 DAG size of output: 101 [2020-07-19 21:13:03,929 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 135 DAG size of output: 101 [2020-07-19 21:13:06,257 WARN L193 SmtUtils]: Spent 1.55 s on a formula simplification. DAG size of input: 188 DAG size of output: 46 [2020-07-19 21:13:06,357 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-19 21:13:06,357 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-19 21:13:06,357 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-19 21:13:06,358 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-19 21:13:06,358 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-19 21:13:06,358 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-19 21:13:06,358 INFO L268 CegarLoopResult]: For program point ackermannEXIT(lines 14 22) no Hoare annotation was computed. [2020-07-19 21:13:06,358 INFO L271 CegarLoopResult]: At program point ackermannENTRY(lines 14 22) the Hoare annotation is: true [2020-07-19 21:13:06,358 INFO L264 CegarLoopResult]: At program point L21(line 21) the Hoare annotation is: (and (= ackermann_~m |ackermann_#in~m|) (= ackermann_~n |ackermann_#in~n|) (or (not (<= |ackermann_#in~n| 1)) (not (= 0 |ackermann_#in~m|)) (not (<= 1 |ackermann_#in~n|)))) [2020-07-19 21:13:06,358 INFO L268 CegarLoopResult]: For program point L21-1(line 21) no Hoare annotation was computed. [2020-07-19 21:13:06,359 INFO L264 CegarLoopResult]: At program point L19(line 19) the Hoare annotation is: (and (= ackermann_~m |ackermann_#in~m|) (= ackermann_~n |ackermann_#in~n|) (= 0 |ackermann_#in~n|)) [2020-07-19 21:13:06,359 INFO L264 CegarLoopResult]: At program point L21-2(line 21) the Hoare annotation is: (let ((.cse5 (= ackermann_~m |ackermann_#in~m|)) (.cse11 (= ackermann_~n |ackermann_#in~n|))) (let ((.cse1 (<= 1 |ackermann_#in~m|)) (.cse4 (and (= 0 |ackermann_#in~m|) .cse5 .cse11)) (.cse8 (<= 6 |ackermann_#t~ret1|)) (.cse7 (<= 5 |ackermann_#t~ret1|)) (.cse3 (<= 2 |ackermann_#in~n|)) (.cse10 (<= |ackermann_#in~n| 2)) (.cse0 (<= |ackermann_#in~m| 1)) (.cse6 (<= |ackermann_#in~n| 1)) (.cse9 (<= 3 |ackermann_#t~ret1|)) (.cse2 (<= 1 |ackermann_#in~n|))) (and (or (not .cse0) (and (<= |ackermann_#t~ret1| 2) (<= 2 |ackermann_#t~ret1|) .cse1 .cse2) .cse3 .cse4) .cse5 (or .cse6 (and (<= |ackermann_#in~n| 4) .cse7 .cse1) (and .cse1 (<= |ackermann_#in~n| 3) (<= 4 |ackermann_#t~ret1|)) (and .cse1 .cse8) (and .cse9 .cse10 .cse1) .cse4) .cse11 (or (and .cse3 .cse8) (and (<= ackermann_~m 2) .cse7 .cse3 .cse10) .cse0 (and .cse6 .cse9 .cse2))))) [2020-07-19 21:13:06,359 INFO L268 CegarLoopResult]: For program point L18(lines 18 20) no Hoare annotation was computed. [2020-07-19 21:13:06,359 INFO L268 CegarLoopResult]: For program point L19-1(line 19) no Hoare annotation was computed. [2020-07-19 21:13:06,359 INFO L268 CegarLoopResult]: For program point L21-3(line 21) no Hoare annotation was computed. [2020-07-19 21:13:06,359 INFO L268 CegarLoopResult]: For program point L15(lines 15 17) no Hoare annotation was computed. [2020-07-19 21:13:06,360 INFO L268 CegarLoopResult]: For program point ackermannFINAL(lines 14 22) no Hoare annotation was computed. [2020-07-19 21:13:06,360 INFO L268 CegarLoopResult]: For program point L33(lines 33 38) no Hoare annotation was computed. [2020-07-19 21:13:06,360 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 43) no Hoare annotation was computed. [2020-07-19 21:13:06,360 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 25 45) the Hoare annotation is: true [2020-07-19 21:13:06,363 INFO L268 CegarLoopResult]: For program point L27(lines 27 31) no Hoare annotation was computed. [2020-07-19 21:13:06,363 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 25 45) no Hoare annotation was computed. [2020-07-19 21:13:06,364 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 25 45) no Hoare annotation was computed. [2020-07-19 21:13:06,364 INFO L268 CegarLoopResult]: For program point L43(line 43) no Hoare annotation was computed. [2020-07-19 21:13:06,364 INFO L268 CegarLoopResult]: For program point L40(lines 40 44) no Hoare annotation was computed. [2020-07-19 21:13:06,364 INFO L271 CegarLoopResult]: At program point L39(line 39) the Hoare annotation is: true [2020-07-19 21:13:06,364 INFO L268 CegarLoopResult]: For program point L39-1(line 39) no Hoare annotation was computed. [2020-07-19 21:13:06,371 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.07 09:13:06 BoogieIcfgContainer [2020-07-19 21:13:06,371 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-19 21:13:06,373 INFO L168 Benchmark]: Toolchain (without parser) took 20175.24 ms. Allocated memory was 141.0 MB in the beginning and 473.4 MB in the end (delta: 332.4 MB). Free memory was 104.1 MB in the beginning and 344.9 MB in the end (delta: -240.8 MB). Peak memory consumption was 352.4 MB. Max. memory is 7.1 GB. [2020-07-19 21:13:06,374 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 141.0 MB. Free memory was 121.8 MB in the beginning and 121.6 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. [2020-07-19 21:13:06,376 INFO L168 Benchmark]: CACSL2BoogieTranslator took 240.43 ms. Allocated memory is still 141.0 MB. Free memory was 103.7 MB in the beginning and 94.1 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. [2020-07-19 21:13:06,384 INFO L168 Benchmark]: Boogie Preprocessor took 26.42 ms. Allocated memory is still 141.0 MB. Free memory was 94.1 MB in the beginning and 92.8 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. [2020-07-19 21:13:06,385 INFO L168 Benchmark]: RCFGBuilder took 361.04 ms. Allocated memory was 141.0 MB in the beginning and 203.4 MB in the end (delta: 62.4 MB). Free memory was 92.8 MB in the beginning and 169.7 MB in the end (delta: -76.9 MB). Peak memory consumption was 11.7 MB. Max. memory is 7.1 GB. [2020-07-19 21:13:06,386 INFO L168 Benchmark]: TraceAbstraction took 19541.85 ms. Allocated memory was 203.4 MB in the beginning and 473.4 MB in the end (delta: 270.0 MB). Free memory was 169.0 MB in the beginning and 344.9 MB in the end (delta: -175.9 MB). Peak memory consumption was 354.9 MB. Max. memory is 7.1 GB. [2020-07-19 21:13:06,390 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 141.0 MB. Free memory was 121.8 MB in the beginning and 121.6 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 240.43 ms. Allocated memory is still 141.0 MB. Free memory was 103.7 MB in the beginning and 94.1 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 26.42 ms. Allocated memory is still 141.0 MB. Free memory was 94.1 MB in the beginning and 92.8 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 361.04 ms. Allocated memory was 141.0 MB in the beginning and 203.4 MB in the end (delta: 62.4 MB). Free memory was 92.8 MB in the beginning and 169.7 MB in the end (delta: -76.9 MB). Peak memory consumption was 11.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 19541.85 ms. Allocated memory was 203.4 MB in the beginning and 473.4 MB in the end (delta: 270.0 MB). Free memory was 169.0 MB in the beginning and 344.9 MB in the end (delta: -175.9 MB). Peak memory consumption was 354.9 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 43]: 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, 27 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 15.3s, OverallIterations: 11, TraceHistogramMax: 28, AutomataDifference: 6.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 4.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 315 SDtfs, 337 SDslu, 1585 SDs, 0 SdLazy, 3381 SolverSat, 847 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1942 GetRequests, 1609 SyntacticMatches, 0 SemanticMatches, 333 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3161 ImplicationChecksByTransitivity, 4.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=133occurred in iteration=10, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 11 MinimizatonAttempts, 113 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 9 LocationsWithAnnotation, 557 PreInvPairs, 1430 NumberOfFragments, 159 HoareAnnotationTreeSize, 557 FomulaSimplifications, 162840 FormulaSimplificationTreeSizeReduction, 2.3s HoareSimplificationTime, 9 FomulaSimplificationsInter, 8101 FormulaSimplificationTreeSizeReductionInter, 1.7s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.7s SatisfiabilityAnalysisTime, 4.7s InterpolantComputationTime, 2453 NumberOfCodeBlocks, 2453 NumberOfCodeBlocksAsserted, 21 NumberOfCheckSat, 2432 ConstructedInterpolants, 0 QuantifiedInterpolants, 663240 SizeOfPredicates, 78 NumberOfNonLiveVariables, 3580 ConjunctsInSsa, 217 ConjunctsInUnsatCore, 21 InterpolantComputations, 1 PerfectInterpolantSequences, 14917/18516 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...