/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/recursive-simple/id_i5_o5-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-178dd20 [2021-01-06 19:20:38,865 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-06 19:20:38,868 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-06 19:20:38,924 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-01-06 19:20:38,925 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-01-06 19:20:38,930 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-01-06 19:20:38,934 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-01-06 19:20:38,940 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-01-06 19:20:38,943 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-01-06 19:20:38,950 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-01-06 19:20:38,955 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-01-06 19:20:38,957 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-01-06 19:20:38,958 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-06 19:20:38,961 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-06 19:20:38,964 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-06 19:20:38,966 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-06 19:20:38,967 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-06 19:20:38,971 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-06 19:20:38,980 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-06 19:20:38,997 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-06 19:20:38,999 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-06 19:20:39,002 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-06 19:20:39,003 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-06 19:20:39,007 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-06 19:20:39,017 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-01-06 19:20:39,017 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-01-06 19:20:39,018 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-01-06 19:20:39,020 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-01-06 19:20:39,021 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-01-06 19:20:39,022 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-01-06 19:20:39,022 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-01-06 19:20:39,023 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-01-06 19:20:39,025 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-01-06 19:20:39,026 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-01-06 19:20:39,027 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-01-06 19:20:39,028 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-01-06 19:20:39,028 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-01-06 19:20:39,037 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-01-06 19:20:39,038 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-06 19:20:39,039 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-06 19:20:39,040 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-06 19:20:39,041 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-01-06 19:20:39,099 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-06 19:20:39,099 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-06 19:20:39,103 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-06 19:20:39,104 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-06 19:20:39,104 INFO L138 SettingsManager]: * Use SBE=true [2021-01-06 19:20:39,104 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-06 19:20:39,105 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-06 19:20:39,105 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-06 19:20:39,105 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-01-06 19:20:39,105 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-06 19:20:39,106 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-01-06 19:20:39,107 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-01-06 19:20:39,107 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-06 19:20:39,108 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-01-06 19:20:39,108 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-06 19:20:39,108 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-06 19:20:39,108 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-06 19:20:39,109 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 19:20:39,109 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-06 19:20:39,109 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-06 19:20:39,109 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-01-06 19:20:39,110 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-06 19:20:39,110 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-06 19:20:39,110 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-01-06 19:20:39,110 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-01-06 19:20:39,111 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-06 19:20:39,573 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-06 19:20:39,632 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-06 19:20:39,636 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-06 19:20:39,638 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-06 19:20:39,639 INFO L275 PluginConnector]: CDTParser initialized [2021-01-06 19:20:39,640 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive-simple/id_i5_o5-2.c [2021-01-06 19:20:39,726 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/53988af13/c142570afb2346569d4b84dc7d31cff7/FLAG7a7e89416 [2021-01-06 19:20:40,368 INFO L306 CDTParser]: Found 1 translation units. [2021-01-06 19:20:40,370 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/recursive-simple/id_i5_o5-2.c [2021-01-06 19:20:40,381 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/53988af13/c142570afb2346569d4b84dc7d31cff7/FLAG7a7e89416 [2021-01-06 19:20:40,748 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/53988af13/c142570afb2346569d4b84dc7d31cff7 [2021-01-06 19:20:40,751 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-06 19:20:40,756 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-01-06 19:20:40,760 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-06 19:20:40,761 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-06 19:20:40,765 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-06 19:20:40,767 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 07:20:40" (1/1) ... [2021-01-06 19:20:40,769 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3691e37d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 07:20:40, skipping insertion in model container [2021-01-06 19:20:40,769 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 07:20:40" (1/1) ... [2021-01-06 19:20:40,779 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-06 19:20:40,800 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-01-06 19:20:40,947 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/recursive-simple/id_i5_o5-2.c[450,463] [2021-01-06 19:20:40,951 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 19:20:40,968 INFO L203 MainTranslator]: Completed pre-run [2021-01-06 19:20:40,989 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/recursive-simple/id_i5_o5-2.c[450,463] [2021-01-06 19:20:40,990 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 19:20:41,004 INFO L208 MainTranslator]: Completed translation [2021-01-06 19:20:41,004 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 07:20:41 WrapperNode [2021-01-06 19:20:41,004 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-06 19:20:41,006 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-06 19:20:41,006 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-06 19:20:41,006 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-06 19:20:41,016 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 07:20:41" (1/1) ... [2021-01-06 19:20:41,023 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 07:20:41" (1/1) ... [2021-01-06 19:20:41,043 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-06 19:20:41,047 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-06 19:20:41,047 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-06 19:20:41,047 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-06 19:20:41,055 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 07:20:41" (1/1) ... [2021-01-06 19:20:41,056 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 07:20:41" (1/1) ... [2021-01-06 19:20:41,057 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 07:20:41" (1/1) ... [2021-01-06 19:20:41,057 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 07:20:41" (1/1) ... [2021-01-06 19:20:41,061 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 07:20:41" (1/1) ... [2021-01-06 19:20:41,063 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 07:20:41" (1/1) ... [2021-01-06 19:20:41,064 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 07:20:41" (1/1) ... [2021-01-06 19:20:41,065 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-06 19:20:41,066 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-06 19:20:41,067 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-06 19:20:41,067 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-06 19:20:41,068 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 07:20:41" (1/1) ... No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 19:20:41,165 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-06 19:20:41,166 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-06 19:20:41,166 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-06 19:20:41,166 INFO L130 BoogieDeclarations]: Found specification of procedure id [2021-01-06 19:20:41,166 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2021-01-06 19:20:41,167 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-06 19:20:41,389 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-06 19:20:41,390 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-01-06 19:20:41,391 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 07:20:41 BoogieIcfgContainer [2021-01-06 19:20:41,391 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-06 19:20:41,393 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-06 19:20:41,393 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-06 19:20:41,397 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-06 19:20:41,398 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.01 07:20:40" (1/3) ... [2021-01-06 19:20:41,398 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23b86492 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 07:20:41, skipping insertion in model container [2021-01-06 19:20:41,399 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 07:20:41" (2/3) ... [2021-01-06 19:20:41,399 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23b86492 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 07:20:41, skipping insertion in model container [2021-01-06 19:20:41,399 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 07:20:41" (3/3) ... [2021-01-06 19:20:41,401 INFO L111 eAbstractionObserver]: Analyzing ICFG id_i5_o5-2.c [2021-01-06 19:20:41,408 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-06 19:20:41,413 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-01-06 19:20:41,432 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-01-06 19:20:41,458 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-06 19:20:41,461 INFO L378 AbstractCegarLoop]: Hoare is true [2021-01-06 19:20:41,461 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-06 19:20:41,461 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-06 19:20:41,462 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-06 19:20:41,462 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-06 19:20:41,462 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-01-06 19:20:41,462 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-06 19:20:41,479 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states. [2021-01-06 19:20:41,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-01-06 19:20:41,486 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:20:41,487 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 19:20:41,487 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:20:41,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:20:41,493 INFO L82 PathProgramCache]: Analyzing trace with hash -358017204, now seen corresponding path program 1 times [2021-01-06 19:20:41,503 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:20:41,503 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431074004] [2021-01-06 19:20:41,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:20:41,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:41,761 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:41,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:41,799 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 19:20:41,800 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431074004] [2021-01-06 19:20:41,801 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 19:20:41,802 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-01-06 19:20:41,803 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259693393] [2021-01-06 19:20:41,809 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 19:20:41,810 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:20:41,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 19:20:41,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-01-06 19:20:41,830 INFO L87 Difference]: Start difference. First operand 16 states. Second operand 5 states. [2021-01-06 19:20:41,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:20:41,960 INFO L93 Difference]: Finished difference Result 25 states and 28 transitions. [2021-01-06 19:20:41,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-06 19:20:41,963 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2021-01-06 19:20:41,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:20:41,987 INFO L225 Difference]: With dead ends: 25 [2021-01-06 19:20:41,987 INFO L226 Difference]: Without dead ends: 15 [2021-01-06 19:20:41,992 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-01-06 19:20:42,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-01-06 19:20:42,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2021-01-06 19:20:42,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2021-01-06 19:20:42,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2021-01-06 19:20:42,047 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 10 [2021-01-06 19:20:42,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:20:42,048 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2021-01-06 19:20:42,048 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 19:20:42,049 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2021-01-06 19:20:42,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-01-06 19:20:42,052 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:20:42,052 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 19:20:42,053 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-01-06 19:20:42,054 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:20:42,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:20:42,055 INFO L82 PathProgramCache]: Analyzing trace with hash 679465686, now seen corresponding path program 1 times [2021-01-06 19:20:42,055 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:20:42,056 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704357846] [2021-01-06 19:20:42,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:20:42,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:42,167 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:42,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:42,201 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:42,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:42,224 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-01-06 19:20:42,224 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704357846] [2021-01-06 19:20:42,225 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1400843325] [2021-01-06 19:20:42,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 19:20:42,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:42,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 6 conjunts are in the unsatisfiable core [2021-01-06 19:20:42,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 19:20:42,453 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-01-06 19:20:42,454 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 19:20:42,454 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-01-06 19:20:42,455 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942939588] [2021-01-06 19:20:42,456 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-01-06 19:20:42,457 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:20:42,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-01-06 19:20:42,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-01-06 19:20:42,459 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 8 states. [2021-01-06 19:20:42,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:20:42,511 INFO L93 Difference]: Finished difference Result 22 states and 23 transitions. [2021-01-06 19:20:42,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-06 19:20:42,512 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 16 [2021-01-06 19:20:42,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:20:42,513 INFO L225 Difference]: With dead ends: 22 [2021-01-06 19:20:42,513 INFO L226 Difference]: Without dead ends: 18 [2021-01-06 19:20:42,514 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-01-06 19:20:42,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-01-06 19:20:42,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-01-06 19:20:42,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2021-01-06 19:20:42,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2021-01-06 19:20:42,521 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 16 [2021-01-06 19:20:42,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:20:42,521 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2021-01-06 19:20:42,521 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-01-06 19:20:42,522 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2021-01-06 19:20:42,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-01-06 19:20:42,523 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:20:42,523 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 19:20:42,736 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-01-06 19:20:42,737 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:20:42,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:20:42,739 INFO L82 PathProgramCache]: Analyzing trace with hash -41010676, now seen corresponding path program 2 times [2021-01-06 19:20:42,740 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:20:42,740 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951179924] [2021-01-06 19:20:42,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:20:42,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:42,827 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:42,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:42,890 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:42,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:42,943 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:42,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:42,972 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-01-06 19:20:42,974 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951179924] [2021-01-06 19:20:42,974 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [12356903] [2021-01-06 19:20:42,974 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 19:20:43,052 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 19:20:43,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 19:20:43,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 8 conjunts are in the unsatisfiable core [2021-01-06 19:20:43,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 19:20:43,154 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-01-06 19:20:43,155 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 19:20:43,155 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-01-06 19:20:43,156 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512634664] [2021-01-06 19:20:43,156 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-01-06 19:20:43,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:20:43,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-01-06 19:20:43,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-01-06 19:20:43,158 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 9 states. [2021-01-06 19:20:43,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:20:43,220 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2021-01-06 19:20:43,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-01-06 19:20:43,221 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 22 [2021-01-06 19:20:43,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:20:43,222 INFO L225 Difference]: With dead ends: 25 [2021-01-06 19:20:43,223 INFO L226 Difference]: Without dead ends: 21 [2021-01-06 19:20:43,224 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-01-06 19:20:43,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-01-06 19:20:43,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2021-01-06 19:20:43,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2021-01-06 19:20:43,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2021-01-06 19:20:43,231 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 22 [2021-01-06 19:20:43,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:20:43,231 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2021-01-06 19:20:43,231 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-01-06 19:20:43,231 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2021-01-06 19:20:43,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-01-06 19:20:43,233 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:20:43,233 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 19:20:43,448 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 19:20:43,449 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:20:43,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:20:43,451 INFO L82 PathProgramCache]: Analyzing trace with hash 1769866774, now seen corresponding path program 3 times [2021-01-06 19:20:43,452 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:20:43,452 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312985915] [2021-01-06 19:20:43,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:20:43,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:43,494 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:43,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:43,526 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:43,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:43,567 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:43,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:43,587 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:43,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:43,607 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-01-06 19:20:43,607 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312985915] [2021-01-06 19:20:43,608 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [122163796] [2021-01-06 19:20:43,608 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 19:20:43,656 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-01-06 19:20:43,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 19:20:43,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 19:20:43,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 19:20:43,740 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-01-06 19:20:43,741 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 19:20:43,741 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-01-06 19:20:43,741 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342405925] [2021-01-06 19:20:43,742 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-01-06 19:20:43,742 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:20:43,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-01-06 19:20:43,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-01-06 19:20:43,743 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 10 states. [2021-01-06 19:20:43,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:20:43,804 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2021-01-06 19:20:43,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-01-06 19:20:43,805 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 28 [2021-01-06 19:20:43,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:20:43,806 INFO L225 Difference]: With dead ends: 28 [2021-01-06 19:20:43,806 INFO L226 Difference]: Without dead ends: 24 [2021-01-06 19:20:43,807 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2021-01-06 19:20:43,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-01-06 19:20:43,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-01-06 19:20:43,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2021-01-06 19:20:43,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2021-01-06 19:20:43,813 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 28 [2021-01-06 19:20:43,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:20:43,813 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2021-01-06 19:20:43,813 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-01-06 19:20:43,813 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2021-01-06 19:20:43,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-01-06 19:20:43,814 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:20:43,815 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 19:20:44,028 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 19:20:44,029 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:20:44,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:20:44,030 INFO L82 PathProgramCache]: Analyzing trace with hash 371264716, now seen corresponding path program 4 times [2021-01-06 19:20:44,031 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:20:44,031 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494297106] [2021-01-06 19:20:44,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:20:44,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:44,063 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:44,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:44,091 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:44,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:44,111 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:44,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:44,129 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:44,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:44,146 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:44,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:44,172 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-01-06 19:20:44,172 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494297106] [2021-01-06 19:20:44,173 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [273632634] [2021-01-06 19:20:44,173 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 19:20:44,223 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 19:20:44,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 19:20:44,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-06 19:20:44,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 19:20:44,360 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-01-06 19:20:44,361 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 19:20:44,361 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-01-06 19:20:44,361 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769590382] [2021-01-06 19:20:44,362 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-01-06 19:20:44,362 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:20:44,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-01-06 19:20:44,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-01-06 19:20:44,363 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 11 states. [2021-01-06 19:20:44,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:20:44,426 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2021-01-06 19:20:44,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-06 19:20:44,427 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 34 [2021-01-06 19:20:44,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:20:44,428 INFO L225 Difference]: With dead ends: 31 [2021-01-06 19:20:44,428 INFO L226 Difference]: Without dead ends: 27 [2021-01-06 19:20:44,429 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2021-01-06 19:20:44,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-01-06 19:20:44,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-01-06 19:20:44,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2021-01-06 19:20:44,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2021-01-06 19:20:44,435 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 34 [2021-01-06 19:20:44,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:20:44,435 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2021-01-06 19:20:44,436 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-01-06 19:20:44,436 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2021-01-06 19:20:44,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-01-06 19:20:44,437 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:20:44,437 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 19:20:44,652 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 19:20:44,653 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:20:44,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:20:44,654 INFO L82 PathProgramCache]: Analyzing trace with hash -886339242, now seen corresponding path program 5 times [2021-01-06 19:20:44,655 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:20:44,655 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365613951] [2021-01-06 19:20:44,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:20:44,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:44,706 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:44,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:44,743 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:44,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:44,779 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:44,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:44,832 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:44,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:44,871 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:44,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:44,906 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:44,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:44,933 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-01-06 19:20:44,933 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365613951] [2021-01-06 19:20:44,934 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2127907799] [2021-01-06 19:20:44,934 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 19:20:44,990 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-01-06 19:20:44,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 19:20:44,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 27 conjunts are in the unsatisfiable core [2021-01-06 19:20:44,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 19:20:45,068 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-01-06 19:20:45,069 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 19:20:45,069 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2021-01-06 19:20:45,069 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529714680] [2021-01-06 19:20:45,070 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-01-06 19:20:45,070 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:20:45,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-01-06 19:20:45,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2021-01-06 19:20:45,071 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 15 states. [2021-01-06 19:20:45,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:20:45,154 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2021-01-06 19:20:45,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-01-06 19:20:45,155 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 40 [2021-01-06 19:20:45,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:20:45,156 INFO L225 Difference]: With dead ends: 34 [2021-01-06 19:20:45,157 INFO L226 Difference]: Without dead ends: 30 [2021-01-06 19:20:45,157 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 51 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2021-01-06 19:20:45,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-01-06 19:20:45,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2021-01-06 19:20:45,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2021-01-06 19:20:45,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2021-01-06 19:20:45,164 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 40 [2021-01-06 19:20:45,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:20:45,164 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2021-01-06 19:20:45,164 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2021-01-06 19:20:45,164 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2021-01-06 19:20:45,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-01-06 19:20:45,166 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:20:45,166 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 19:20:45,380 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-01-06 19:20:45,381 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:20:45,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:20:45,382 INFO L82 PathProgramCache]: Analyzing trace with hash -918712436, now seen corresponding path program 6 times [2021-01-06 19:20:45,382 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:20:45,383 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148219670] [2021-01-06 19:20:45,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:20:45,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:45,412 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:45,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:45,438 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:45,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:45,459 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:45,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:45,481 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:45,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:45,500 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:45,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:45,522 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:45,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:45,539 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:45,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:45,562 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 45 proven. 12 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-01-06 19:20:45,563 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148219670] [2021-01-06 19:20:45,563 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2133864908] [2021-01-06 19:20:45,563 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 19:20:45,624 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-01-06 19:20:45,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 19:20:45,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 16 conjunts are in the unsatisfiable core [2021-01-06 19:20:45,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 19:20:45,777 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-01-06 19:20:45,778 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-01-06 19:20:45,779 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [11] total 13 [2021-01-06 19:20:45,779 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968931476] [2021-01-06 19:20:45,779 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-01-06 19:20:45,780 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:20:45,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-01-06 19:20:45,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-01-06 19:20:45,784 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 11 states. [2021-01-06 19:20:45,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:20:45,931 INFO L93 Difference]: Finished difference Result 30 states and 31 transitions. [2021-01-06 19:20:45,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 19:20:45,932 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 46 [2021-01-06 19:20:45,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:20:45,932 INFO L225 Difference]: With dead ends: 30 [2021-01-06 19:20:45,932 INFO L226 Difference]: Without dead ends: 0 [2021-01-06 19:20:45,933 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=116, Invalid=264, Unknown=0, NotChecked=0, Total=380 [2021-01-06 19:20:45,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-01-06 19:20:45,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-01-06 19:20:45,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2021-01-06 19:20:45,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-01-06 19:20:45,934 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 46 [2021-01-06 19:20:45,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:20:45,934 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-01-06 19:20:45,934 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-01-06 19:20:45,935 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-01-06 19:20:45,935 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-01-06 19:20:46,148 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 19:20:46,152 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-01-06 19:20:46,174 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-01-06 19:20:46,175 INFO L189 CegarLoopUtils]: For program point L-1(line -1) no Hoare annotation was computed. [2021-01-06 19:20:46,175 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-01-06 19:20:46,175 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-01-06 19:20:46,175 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 15) no Hoare annotation was computed. [2021-01-06 19:20:46,175 INFO L189 CegarLoopUtils]: For program point L15(line 15) no Hoare annotation was computed. [2021-01-06 19:20:46,175 INFO L189 CegarLoopUtils]: For program point L14(lines 14 16) no Hoare annotation was computed. [2021-01-06 19:20:46,176 INFO L185 CegarLoopUtils]: At program point L13(line 13) the Hoare annotation is: (and (<= 5 ULTIMATE.start_main_~input~0) (<= ULTIMATE.start_main_~input~0 5)) [2021-01-06 19:20:46,176 INFO L189 CegarLoopUtils]: For program point L13-1(line 13) no Hoare annotation was computed. [2021-01-06 19:20:46,176 INFO L189 CegarLoopUtils]: For program point L11(lines 11 17) no Hoare annotation was computed. [2021-01-06 19:20:46,176 INFO L189 CegarLoopUtils]: For program point idFINAL(lines 6 9) no Hoare annotation was computed. [2021-01-06 19:20:46,176 INFO L189 CegarLoopUtils]: For program point idEXIT(lines 6 9) no Hoare annotation was computed. [2021-01-06 19:20:46,176 INFO L185 CegarLoopUtils]: At program point L8(line 8) the Hoare annotation is: (= |id_#in~x| id_~x) [2021-01-06 19:20:46,176 INFO L192 CegarLoopUtils]: At program point idENTRY(lines 6 9) the Hoare annotation is: true [2021-01-06 19:20:46,176 INFO L189 CegarLoopUtils]: For program point L7(line 7) no Hoare annotation was computed. [2021-01-06 19:20:46,176 INFO L189 CegarLoopUtils]: For program point L8-1(line 8) no Hoare annotation was computed. [2021-01-06 19:20:46,182 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.01 07:20:46 BoogieIcfgContainer [2021-01-06 19:20:46,182 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-01-06 19:20:46,182 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-01-06 19:20:46,182 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-01-06 19:20:46,183 INFO L275 PluginConnector]: Witness Printer initialized [2021-01-06 19:20:46,183 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 07:20:41" (3/4) ... [2021-01-06 19:20:46,187 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-01-06 19:20:46,195 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure id [2021-01-06 19:20:46,199 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 9 nodes and edges [2021-01-06 19:20:46,199 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-01-06 19:20:46,200 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-01-06 19:20:46,200 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-01-06 19:20:46,238 INFO L141 WitnessManager]: Wrote witness to /storage/repos/svcomp/c/recursive-simple/id_i5_o5-2.c-witness.graphml [2021-01-06 19:20:46,238 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-01-06 19:20:46,240 INFO L168 Benchmark]: Toolchain (without parser) took 5485.87 ms. Allocated memory was 159.4 MB in the beginning and 194.0 MB in the end (delta: 34.6 MB). Free memory was 134.1 MB in the beginning and 140.4 MB in the end (delta: -6.3 MB). Peak memory consumption was 28.4 MB. Max. memory is 8.0 GB. [2021-01-06 19:20:46,241 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 159.4 MB. Free memory is still 131.5 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-01-06 19:20:46,242 INFO L168 Benchmark]: CACSL2BoogieTranslator took 244.69 ms. Allocated memory is still 159.4 MB. Free memory was 133.8 MB in the beginning and 124.8 MB in the end (delta: 9.0 MB). Peak memory consumption was 8.4 MB. Max. memory is 8.0 GB. [2021-01-06 19:20:46,242 INFO L168 Benchmark]: Boogie Procedure Inliner took 39.15 ms. Allocated memory is still 159.4 MB. Free memory was 124.7 MB in the beginning and 123.4 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-01-06 19:20:46,243 INFO L168 Benchmark]: Boogie Preprocessor took 18.83 ms. Allocated memory is still 159.4 MB. Free memory was 123.4 MB in the beginning and 122.5 MB in the end (delta: 895.1 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-01-06 19:20:46,244 INFO L168 Benchmark]: RCFGBuilder took 325.28 ms. Allocated memory is still 159.4 MB. Free memory was 122.5 MB in the beginning and 111.3 MB in the end (delta: 11.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2021-01-06 19:20:46,244 INFO L168 Benchmark]: TraceAbstraction took 4788.68 ms. Allocated memory was 159.4 MB in the beginning and 194.0 MB in the end (delta: 34.6 MB). Free memory was 110.8 MB in the beginning and 143.1 MB in the end (delta: -32.2 MB). Peak memory consumption was 3.2 MB. Max. memory is 8.0 GB. [2021-01-06 19:20:46,245 INFO L168 Benchmark]: Witness Printer took 55.98 ms. Allocated memory is still 194.0 MB. Free memory was 143.1 MB in the beginning and 140.4 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-01-06 19:20:46,249 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 159.4 MB. Free memory is still 131.5 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 244.69 ms. Allocated memory is still 159.4 MB. Free memory was 133.8 MB in the beginning and 124.8 MB in the end (delta: 9.0 MB). Peak memory consumption was 8.4 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 39.15 ms. Allocated memory is still 159.4 MB. Free memory was 124.7 MB in the beginning and 123.4 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 18.83 ms. Allocated memory is still 159.4 MB. Free memory was 123.4 MB in the beginning and 122.5 MB in the end (delta: 895.1 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 325.28 ms. Allocated memory is still 159.4 MB. Free memory was 122.5 MB in the beginning and 111.3 MB in the end (delta: 11.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * TraceAbstraction took 4788.68 ms. Allocated memory was 159.4 MB in the beginning and 194.0 MB in the end (delta: 34.6 MB). Free memory was 110.8 MB in the beginning and 143.1 MB in the end (delta: -32.2 MB). Peak memory consumption was 3.2 MB. Max. memory is 8.0 GB. * Witness Printer took 55.98 ms. Allocated memory is still 194.0 MB. Free memory was 143.1 MB in the beginning and 140.4 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 15]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 16 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 4.6s, OverallIterations: 7, TraceHistogramMax: 7, AutomataDifference: 0.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 93 SDtfs, 81 SDslu, 427 SDs, 0 SdLazy, 272 SolverSat, 16 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 313 GetRequests, 232 SyntacticMatches, 2 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=30occurred in iteration=6, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 7 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 3 LocationsWithAnnotation, 5 PreInvPairs, 5 NumberOfFragments, 11 HoareAnnotationTreeSize, 5 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 3 FomulaSimplificationsInter, 4 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 1.7s InterpolantComputationTime, 382 NumberOfCodeBlocks, 376 NumberOfCodeBlocksAsserted, 28 NumberOfCheckSat, 369 ConstructedInterpolants, 0 QuantifiedInterpolants, 33225 SizeOfPredicates, 27 NumberOfNonLiveVariables, 557 ConjunctsInSsa, 79 ConjunctsInUnsatCore, 13 InterpolantComputations, 2 PerfectInterpolantSequences, 396/588 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...