/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/nla-digbench-scaling/geo2-ll_unwindbound10.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-dcfa08f [2020-12-23 07:46:19,903 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-23 07:46:19,906 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-23 07:46:19,953 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-23 07:46:19,953 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-23 07:46:19,958 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-23 07:46:19,962 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-23 07:46:19,967 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-23 07:46:19,970 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-23 07:46:19,977 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-23 07:46:19,981 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-23 07:46:19,982 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-23 07:46:19,983 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-23 07:46:19,986 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-23 07:46:19,989 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-23 07:46:19,991 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-23 07:46:19,992 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-23 07:46:19,996 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-23 07:46:20,014 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-23 07:46:20,023 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-23 07:46:20,025 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-23 07:46:20,027 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-23 07:46:20,028 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-23 07:46:20,031 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-23 07:46:20,036 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-23 07:46:20,036 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-23 07:46:20,037 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-23 07:46:20,038 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-23 07:46:20,041 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-23 07:46:20,043 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-23 07:46:20,043 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-23 07:46:20,044 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-23 07:46:20,045 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-23 07:46:20,046 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-23 07:46:20,047 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-23 07:46:20,047 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-23 07:46:20,048 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-23 07:46:20,055 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-23 07:46:20,055 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-23 07:46:20,056 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-23 07:46:20,057 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-23 07:46:20,062 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-23 07:46:20,113 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-23 07:46:20,114 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-23 07:46:20,119 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-23 07:46:20,119 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-23 07:46:20,119 INFO L138 SettingsManager]: * Use SBE=true [2020-12-23 07:46:20,119 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-23 07:46:20,120 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-23 07:46:20,120 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-23 07:46:20,120 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-23 07:46:20,120 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-23 07:46:20,122 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-23 07:46:20,122 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-23 07:46:20,122 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-23 07:46:20,123 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-23 07:46:20,123 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-23 07:46:20,123 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-23 07:46:20,123 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-23 07:46:20,123 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 07:46:20,124 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-23 07:46:20,124 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-23 07:46:20,124 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-23 07:46:20,124 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-23 07:46:20,125 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-23 07:46:20,125 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-23 07:46:20,125 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-23 07:46:20,125 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-23 07:46:20,536 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-23 07:46:20,567 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-23 07:46:20,570 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-23 07:46:20,572 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-23 07:46:20,573 INFO L275 PluginConnector]: CDTParser initialized [2020-12-23 07:46:20,574 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/geo2-ll_unwindbound10.c [2020-12-23 07:46:20,647 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/3b88224c3/b1aa1a4f9b354f208e7e3c5029a58f95/FLAGd5f9c3afb [2020-12-23 07:46:21,297 INFO L306 CDTParser]: Found 1 translation units. [2020-12-23 07:46:21,298 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/geo2-ll_unwindbound10.c [2020-12-23 07:46:21,306 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/3b88224c3/b1aa1a4f9b354f208e7e3c5029a58f95/FLAGd5f9c3afb [2020-12-23 07:46:21,644 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/3b88224c3/b1aa1a4f9b354f208e7e3c5029a58f95 [2020-12-23 07:46:21,647 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-23 07:46:21,649 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-23 07:46:21,651 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-23 07:46:21,651 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-23 07:46:21,655 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-23 07:46:21,655 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 07:46:21" (1/1) ... [2020-12-23 07:46:21,657 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1e13628 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:46:21, skipping insertion in model container [2020-12-23 07:46:21,657 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 07:46:21" (1/1) ... [2020-12-23 07:46:21,668 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-23 07:46:21,682 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-23 07:46:21,827 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/nla-digbench-scaling/geo2-ll_unwindbound10.c[525,538] left hand side expression in assignment: lhs: VariableLHS[~z~0,] left hand side expression in assignment: lhs: VariableLHS[~k~0,] left hand side expression in assignment: lhs: VariableLHS[~x~0,] left hand side expression in assignment: lhs: VariableLHS[~y~0,] left hand side expression in assignment: lhs: VariableLHS[~c~0,] left hand side expression in assignment: lhs: VariableLHS[~c~0,] left hand side expression in assignment: lhs: VariableLHS[~x~0,] left hand side expression in assignment: lhs: VariableLHS[~y~0,] [2020-12-23 07:46:21,844 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 07:46:21,854 INFO L203 MainTranslator]: Completed pre-run [2020-12-23 07:46:21,868 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/nla-digbench-scaling/geo2-ll_unwindbound10.c[525,538] left hand side expression in assignment: lhs: VariableLHS[~z~0,] left hand side expression in assignment: lhs: VariableLHS[~k~0,] left hand side expression in assignment: lhs: VariableLHS[~x~0,] left hand side expression in assignment: lhs: VariableLHS[~y~0,] left hand side expression in assignment: lhs: VariableLHS[~c~0,] left hand side expression in assignment: lhs: VariableLHS[~c~0,] left hand side expression in assignment: lhs: VariableLHS[~x~0,] left hand side expression in assignment: lhs: VariableLHS[~y~0,] [2020-12-23 07:46:21,874 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 07:46:21,890 INFO L208 MainTranslator]: Completed translation [2020-12-23 07:46:21,890 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:46:21 WrapperNode [2020-12-23 07:46:21,890 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-23 07:46:21,892 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-23 07:46:21,892 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-23 07:46:21,892 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-23 07:46:21,901 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:46:21" (1/1) ... [2020-12-23 07:46:21,910 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:46:21" (1/1) ... [2020-12-23 07:46:21,932 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-23 07:46:21,933 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-23 07:46:21,933 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-23 07:46:21,933 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-23 07:46:21,944 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:46:21" (1/1) ... [2020-12-23 07:46:21,944 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:46:21" (1/1) ... [2020-12-23 07:46:21,946 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:46:21" (1/1) ... [2020-12-23 07:46:21,946 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:46:21" (1/1) ... [2020-12-23 07:46:21,950 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:46:21" (1/1) ... [2020-12-23 07:46:21,955 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:46:21" (1/1) ... [2020-12-23 07:46:21,956 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:46:21" (1/1) ... [2020-12-23 07:46:21,958 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-23 07:46:21,959 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-23 07:46:21,959 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-23 07:46:21,959 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-23 07:46:21,960 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:46:21" (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 [2020-12-23 07:46:22,079 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-23 07:46:22,080 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-23 07:46:22,081 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-23 07:46:22,081 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-23 07:46:22,501 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-23 07:46:22,501 INFO L299 CfgBuilder]: Removed 9 assume(true) statements. [2020-12-23 07:46:22,503 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 07:46:22 BoogieIcfgContainer [2020-12-23 07:46:22,503 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-23 07:46:22,505 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-23 07:46:22,506 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-23 07:46:22,509 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-23 07:46:22,510 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.12 07:46:21" (1/3) ... [2020-12-23 07:46:22,511 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e50b986 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 07:46:22, skipping insertion in model container [2020-12-23 07:46:22,511 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:46:21" (2/3) ... [2020-12-23 07:46:22,512 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e50b986 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 07:46:22, skipping insertion in model container [2020-12-23 07:46:22,512 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 07:46:22" (3/3) ... [2020-12-23 07:46:22,514 INFO L111 eAbstractionObserver]: Analyzing ICFG geo2-ll_unwindbound10.c [2020-12-23 07:46:22,541 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-23 07:46:22,548 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-12-23 07:46:22,571 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-12-23 07:46:22,631 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-23 07:46:22,632 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-23 07:46:22,632 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-23 07:46:22,632 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-23 07:46:22,632 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-23 07:46:22,632 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-23 07:46:22,633 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-23 07:46:22,633 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-23 07:46:22,663 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states. [2020-12-23 07:46:22,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-23 07:46:22,669 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:46:22,670 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-23 07:46:22,670 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:46:22,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:46:22,677 INFO L82 PathProgramCache]: Analyzing trace with hash 889571274, now seen corresponding path program 1 times [2020-12-23 07:46:22,688 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:46:22,688 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284884942] [2020-12-23 07:46:22,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:46:22,826 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:46:22,827 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1724465964] [2020-12-23 07:46:22,827 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 [2020-12-23 07:46:22,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:46:22,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-23 07:46:22,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:46:23,026 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:46:23,027 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284884942] [2020-12-23 07:46:23,028 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:46:23,028 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1724465964] [2020-12-23 07:46:23,029 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 07:46:23,029 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-23 07:46:23,030 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489369970] [2020-12-23 07:46:23,035 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 07:46:23,036 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:46:23,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 07:46:23,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-23 07:46:23,054 INFO L87 Difference]: Start difference. First operand 16 states. Second operand 4 states. [2020-12-23 07:46:23,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:46:23,163 INFO L93 Difference]: Finished difference Result 44 states and 58 transitions. [2020-12-23 07:46:23,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 07:46:23,165 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-12-23 07:46:23,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:46:23,175 INFO L225 Difference]: With dead ends: 44 [2020-12-23 07:46:23,175 INFO L226 Difference]: Without dead ends: 19 [2020-12-23 07:46:23,178 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-23 07:46:23,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-12-23 07:46:23,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 16. [2020-12-23 07:46:23,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-12-23 07:46:23,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2020-12-23 07:46:23,220 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 6 [2020-12-23 07:46:23,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:46:23,220 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2020-12-23 07:46:23,221 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 07:46:23,221 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2020-12-23 07:46:23,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-23 07:46:23,221 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:46:23,222 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2020-12-23 07:46:23,436 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2020-12-23 07:46:23,437 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:46:23,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:46:23,438 INFO L82 PathProgramCache]: Analyzing trace with hash 855725686, now seen corresponding path program 1 times [2020-12-23 07:46:23,439 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:46:23,439 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797927672] [2020-12-23 07:46:23,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:46:23,455 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:46:23,456 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1242335273] [2020-12-23 07:46:23,456 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 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 [2020-12-23 07:46:23,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:46:23,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-23 07:46:23,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:46:23,706 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:46:23,707 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797927672] [2020-12-23 07:46:23,707 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:46:23,707 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1242335273] [2020-12-23 07:46:23,707 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:46:23,707 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-12-23 07:46:23,708 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593121003] [2020-12-23 07:46:23,709 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 07:46:23,709 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:46:23,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 07:46:23,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-12-23 07:46:23,711 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand 6 states. [2020-12-23 07:46:23,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:46:23,819 INFO L93 Difference]: Finished difference Result 29 states and 32 transitions. [2020-12-23 07:46:23,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 07:46:23,820 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-12-23 07:46:23,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:46:23,821 INFO L225 Difference]: With dead ends: 29 [2020-12-23 07:46:23,821 INFO L226 Difference]: Without dead ends: 23 [2020-12-23 07:46:23,822 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-23 07:46:23,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-12-23 07:46:23,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 20. [2020-12-23 07:46:23,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-12-23 07:46:23,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2020-12-23 07:46:23,828 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 10 [2020-12-23 07:46:23,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:46:23,829 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2020-12-23 07:46:23,829 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 07:46:23,829 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2020-12-23 07:46:23,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 07:46:23,830 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:46:23,830 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1] [2020-12-23 07:46:24,043 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:46:24,044 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:46:24,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:46:24,046 INFO L82 PathProgramCache]: Analyzing trace with hash -1778536670, now seen corresponding path program 2 times [2020-12-23 07:46:24,047 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:46:24,047 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335831053] [2020-12-23 07:46:24,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:46:24,063 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:46:24,064 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1027453167] [2020-12-23 07:46:24,064 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 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 [2020-12-23 07:46:24,156 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 07:46:24,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:46:24,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 30 conjunts are in the unsatisfiable core [2020-12-23 07:46:24,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:46:24,394 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:46:24,395 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335831053] [2020-12-23 07:46:24,395 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:46:24,396 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1027453167] [2020-12-23 07:46:24,396 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:46:24,396 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-12-23 07:46:24,396 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827697576] [2020-12-23 07:46:24,397 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-23 07:46:24,397 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:46:24,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-23 07:46:24,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-12-23 07:46:24,399 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 8 states. [2020-12-23 07:46:36,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:46:36,930 INFO L93 Difference]: Finished difference Result 33 states and 36 transitions. [2020-12-23 07:46:36,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-23 07:46:36,931 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 14 [2020-12-23 07:46:36,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:46:36,932 INFO L225 Difference]: With dead ends: 33 [2020-12-23 07:46:36,932 INFO L226 Difference]: Without dead ends: 31 [2020-12-23 07:46:36,932 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-12-23 07:46:36,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-12-23 07:46:36,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 23. [2020-12-23 07:46:36,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-12-23 07:46:36,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2020-12-23 07:46:36,941 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 14 [2020-12-23 07:46:36,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:46:36,941 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2020-12-23 07:46:36,941 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-23 07:46:36,942 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2020-12-23 07:46:36,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-23 07:46:36,944 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:46:36,945 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2020-12-23 07:46:37,160 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:46:37,161 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:46:37,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:46:37,162 INFO L82 PathProgramCache]: Analyzing trace with hash 699894435, now seen corresponding path program 1 times [2020-12-23 07:46:37,163 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:46:37,163 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585390193] [2020-12-23 07:46:37,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:46:37,185 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:46:37,186 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [240710149] [2020-12-23 07:46:37,186 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 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 [2020-12-23 07:46:37,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:46:37,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-23 07:46:37,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:46:37,381 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:46:37,383 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585390193] [2020-12-23 07:46:37,384 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:46:37,384 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [240710149] [2020-12-23 07:46:37,384 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:46:37,384 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-12-23 07:46:37,385 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131776861] [2020-12-23 07:46:37,385 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 07:46:37,385 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:46:37,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 07:46:37,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-23 07:46:37,389 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand 6 states. [2020-12-23 07:46:37,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:46:37,462 INFO L93 Difference]: Finished difference Result 27 states and 28 transitions. [2020-12-23 07:46:37,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-23 07:46:37,462 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2020-12-23 07:46:37,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:46:37,463 INFO L225 Difference]: With dead ends: 27 [2020-12-23 07:46:37,463 INFO L226 Difference]: Without dead ends: 23 [2020-12-23 07:46:37,464 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-12-23 07:46:37,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-12-23 07:46:37,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-12-23 07:46:37,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-12-23 07:46:37,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2020-12-23 07:46:37,469 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 15 [2020-12-23 07:46:37,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:46:37,470 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2020-12-23 07:46:37,470 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 07:46:37,470 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2020-12-23 07:46:37,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-23 07:46:37,471 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:46:37,471 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1] [2020-12-23 07:46:37,672 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:46:37,673 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:46:37,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:46:37,674 INFO L82 PathProgramCache]: Analyzing trace with hash -1664485700, now seen corresponding path program 1 times [2020-12-23 07:46:37,674 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:46:37,675 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044807083] [2020-12-23 07:46:37,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:46:37,694 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:46:37,694 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1664456875] [2020-12-23 07:46:37,694 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 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 [2020-12-23 07:46:37,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:46:37,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-23 07:46:37,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:46:37,895 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-12-23 07:46:37,896 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044807083] [2020-12-23 07:46:37,896 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:46:37,896 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1664456875] [2020-12-23 07:46:37,896 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 07:46:37,897 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-23 07:46:37,897 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812010309] [2020-12-23 07:46:37,897 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 07:46:37,898 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:46:37,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 07:46:37,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-23 07:46:37,899 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand 5 states. [2020-12-23 07:46:42,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:46:42,001 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2020-12-23 07:46:42,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 07:46:42,002 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2020-12-23 07:46:42,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:46:42,003 INFO L225 Difference]: With dead ends: 27 [2020-12-23 07:46:42,003 INFO L226 Difference]: Without dead ends: 23 [2020-12-23 07:46:42,003 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-23 07:46:42,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-12-23 07:46:42,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-12-23 07:46:42,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-12-23 07:46:42,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2020-12-23 07:46:42,009 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 17 [2020-12-23 07:46:42,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:46:42,010 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2020-12-23 07:46:42,010 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 07:46:42,010 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2020-12-23 07:46:42,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-12-23 07:46:42,011 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:46:42,011 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1] [2020-12-23 07:46:42,225 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:46:42,226 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:46:42,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:46:42,227 INFO L82 PathProgramCache]: Analyzing trace with hash -58338866, now seen corresponding path program 3 times [2020-12-23 07:46:42,227 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:46:42,228 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75602571] [2020-12-23 07:46:42,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:46:42,250 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:46:42,251 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1333210698] [2020-12-23 07:46:42,251 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 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 [2020-12-23 07:46:42,350 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-23 07:46:42,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:46:42,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-23 07:46:42,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:46:45,187 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 07:46:47,205 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 07:47:03,796 WARN L197 SmtUtils]: Spent 10.22 s on a formula simplification that was a NOOP. DAG size: 33 [2020-12-23 07:47:09,924 WARN L838 $PredicateComparison]: unable to prove that (exists ((ULTIMATE.start_main_~z~0 Int) (ULTIMATE.start_main_~x~0 Int) (ULTIMATE.start_main_~y~0 Int)) (let ((.cse0 (+ ULTIMATE.start_main_~x~0 (- 1)))) (and (= (mod ULTIMATE.start_main_~y~0 ULTIMATE.start_main_~z~0) 0) (= (mod .cse0 ULTIMATE.start_main_~z~0) 0) (let ((.cse1 (div .cse0 ULTIMATE.start_main_~z~0))) (= (+ (* ULTIMATE.start_main_~z~0 (div ULTIMATE.start_main_~y~0 ULTIMATE.start_main_~z~0)) .cse1) (+ (* .cse1 ULTIMATE.start_main_~z~0) 1))) (not (= ULTIMATE.start_main_~z~0 0)) (not (= (+ ULTIMATE.start_main_~x~0 (* ULTIMATE.start_main_~z~0 ULTIMATE.start_main_~y~0)) (+ (* ULTIMATE.start_main_~z~0 ULTIMATE.start_main_~x~0) 1)))))) is different from false [2020-12-23 07:47:11,939 WARN L860 $PredicateComparison]: unable to prove that (exists ((ULTIMATE.start_main_~z~0 Int) (ULTIMATE.start_main_~x~0 Int) (ULTIMATE.start_main_~y~0 Int)) (let ((.cse0 (+ ULTIMATE.start_main_~x~0 (- 1)))) (and (= (mod ULTIMATE.start_main_~y~0 ULTIMATE.start_main_~z~0) 0) (= (mod .cse0 ULTIMATE.start_main_~z~0) 0) (let ((.cse1 (div .cse0 ULTIMATE.start_main_~z~0))) (= (+ (* ULTIMATE.start_main_~z~0 (div ULTIMATE.start_main_~y~0 ULTIMATE.start_main_~z~0)) .cse1) (+ (* .cse1 ULTIMATE.start_main_~z~0) 1))) (not (= ULTIMATE.start_main_~z~0 0)) (not (= (+ ULTIMATE.start_main_~x~0 (* ULTIMATE.start_main_~z~0 ULTIMATE.start_main_~y~0)) (+ (* ULTIMATE.start_main_~z~0 ULTIMATE.start_main_~x~0) 1)))))) is different from true [2020-12-23 07:47:11,945 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-12-23 07:47:11,946 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75602571] [2020-12-23 07:47:11,947 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:47:11,947 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1333210698] [2020-12-23 07:47:11,947 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:47:11,947 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-12-23 07:47:11,948 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651274467] [2020-12-23 07:47:11,948 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-23 07:47:11,948 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:47:11,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-23 07:47:11,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=4, NotChecked=8, Total=42 [2020-12-23 07:47:11,950 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 7 states. [2020-12-23 07:47:20,579 WARN L197 SmtUtils]: Spent 8.08 s on a formula simplification. DAG size of input: 37 DAG size of output: 12 [2020-12-23 07:47:40,274 WARN L197 SmtUtils]: Spent 8.51 s on a formula simplification that was a NOOP. DAG size: 38 [2020-12-23 07:48:44,386 WARN L197 SmtUtils]: Spent 52.01 s on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2020-12-23 07:49:18,159 WARN L197 SmtUtils]: Spent 29.70 s on a formula simplification. DAG size of input: 41 DAG size of output: 29 [2020-12-23 07:49:32,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:49:32,263 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2020-12-23 07:49:32,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-23 07:49:32,275 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 18 [2020-12-23 07:49:32,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:49:32,276 INFO L225 Difference]: With dead ends: 23 [2020-12-23 07:49:32,276 INFO L226 Difference]: Without dead ends: 21 [2020-12-23 07:49:32,276 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 134.1s TimeCoverageRelationStatistics Valid=35, Invalid=47, Unknown=12, NotChecked=16, Total=110 [2020-12-23 07:49:32,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-12-23 07:49:32,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2020-12-23 07:49:32,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-12-23 07:49:32,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2020-12-23 07:49:32,284 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 18 [2020-12-23 07:49:32,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:49:32,284 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2020-12-23 07:49:32,284 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-23 07:49:32,284 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2020-12-23 07:49:32,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-12-23 07:49:32,285 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:49:32,285 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2020-12-23 07:49:32,486 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:49:32,487 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:49:32,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:49:32,489 INFO L82 PathProgramCache]: Analyzing trace with hash -1808548489, now seen corresponding path program 2 times [2020-12-23 07:49:32,490 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:49:32,490 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364926648] [2020-12-23 07:49:32,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:49:32,510 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:49:32,511 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [55710971] [2020-12-23 07:49:32,511 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 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 [2020-12-23 07:49:32,600 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 07:49:32,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:49:32,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-23 07:49:32,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:49:32,764 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:49:32,765 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364926648] [2020-12-23 07:49:32,765 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:49:32,765 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [55710971] [2020-12-23 07:49:32,766 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:49:32,766 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-12-23 07:49:32,766 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869263508] [2020-12-23 07:49:32,767 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-23 07:49:32,767 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:49:32,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-23 07:49:32,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-23 07:49:32,768 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 7 states. [2020-12-23 07:49:32,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:49:32,923 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2020-12-23 07:49:32,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-23 07:49:32,925 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 19 [2020-12-23 07:49:32,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:49:32,926 INFO L225 Difference]: With dead ends: 28 [2020-12-23 07:49:32,926 INFO L226 Difference]: Without dead ends: 24 [2020-12-23 07:49:32,927 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2020-12-23 07:49:32,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-12-23 07:49:32,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-12-23 07:49:32,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-12-23 07:49:32,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2020-12-23 07:49:32,936 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 19 [2020-12-23 07:49:32,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:49:32,936 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2020-12-23 07:49:32,936 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-23 07:49:32,936 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2020-12-23 07:49:32,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-12-23 07:49:32,937 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:49:32,937 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2020-12-23 07:49:33,138 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:49:33,139 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:49:33,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:49:33,140 INFO L82 PathProgramCache]: Analyzing trace with hash 754083403, now seen corresponding path program 3 times [2020-12-23 07:49:33,140 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:49:33,141 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821058091] [2020-12-23 07:49:33,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:49:33,152 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:49:33,152 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [978385561] [2020-12-23 07:49:33,152 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 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 [2020-12-23 07:49:33,240 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-23 07:49:33,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:49:33,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-23 07:49:33,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:49:34,660 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 07:49:35,497 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-12-23 07:49:35,498 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821058091] [2020-12-23 07:49:35,499 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:49:35,499 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [978385561] [2020-12-23 07:49:35,499 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 07:49:35,499 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-23 07:49:35,499 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654830163] [2020-12-23 07:49:35,500 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 07:49:35,500 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:49:35,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 07:49:35,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-23 07:49:35,501 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand 6 states. [2020-12-23 07:49:54,826 WARN L197 SmtUtils]: Spent 10.66 s on a formula simplification that was a NOOP. DAG size: 37 [2020-12-23 07:50:14,171 WARN L197 SmtUtils]: Spent 18.55 s on a formula simplification. DAG size of input: 37 DAG size of output: 31 [2020-12-23 07:50:14,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:50:14,211 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2020-12-23 07:50:14,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-23 07:50:14,214 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 23 [2020-12-23 07:50:14,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:50:14,215 INFO L225 Difference]: With dead ends: 24 [2020-12-23 07:50:14,215 INFO L226 Difference]: Without dead ends: 0 [2020-12-23 07:50:14,216 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 33.7s TimeCoverageRelationStatistics Valid=28, Invalid=43, Unknown=1, NotChecked=0, Total=72 [2020-12-23 07:50:14,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-12-23 07:50:14,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-12-23 07:50:14,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-12-23 07:50:14,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-12-23 07:50:14,217 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 23 [2020-12-23 07:50:14,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:50:14,217 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-12-23 07:50:14,217 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 07:50:14,218 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-12-23 07:50:14,218 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-12-23 07:50:14,419 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2020-12-23 07:50:14,422 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-12-23 07:50:15,282 WARN L197 SmtUtils]: Spent 786.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 34 [2020-12-23 07:50:30,433 WARN L197 SmtUtils]: Spent 15.14 s on a formula simplification. DAG size of input: 48 DAG size of output: 36 [2020-12-23 07:50:30,438 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-12-23 07:50:30,439 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION(line 17) no Hoare annotation was computed. [2020-12-23 07:50:30,439 INFO L189 CegarLoopUtils]: For program point L15(lines 15 18) no Hoare annotation was computed. [2020-12-23 07:50:30,439 INFO L185 CegarLoopUtils]: At program point L15-2(lines 37 38) the Hoare annotation is: (let ((.cse0 (= 1 ULTIMATE.start___VERIFIER_assert_~cond)) (.cse1 (= (+ (* ULTIMATE.start_main_~z~0 ULTIMATE.start_main_~y~0) ULTIMATE.start_main_~x~0) (+ (* ULTIMATE.start_main_~z~0 ULTIMATE.start_main_~x~0) 1)))) (or (and .cse0 .cse1 (or (let ((.cse2 (+ ULTIMATE.start_main_~x~0 (- 1)))) (and (= (mod ULTIMATE.start_main_~y~0 ULTIMATE.start_main_~z~0) 0) (= (mod .cse2 ULTIMATE.start_main_~z~0) 0) (let ((.cse3 (div .cse2 ULTIMATE.start_main_~z~0))) (= (+ (* ULTIMATE.start_main_~z~0 (div ULTIMATE.start_main_~y~0 ULTIMATE.start_main_~z~0)) .cse3) (+ (* .cse3 ULTIMATE.start_main_~z~0) 1))) (not (= ULTIMATE.start_main_~z~0 0)))) (= ULTIMATE.start_main_~y~0 0))) (and (<= ~counter~0 1) .cse0 .cse1 (= ULTIMATE.start_main_~y~0 1)))) [2020-12-23 07:50:30,440 INFO L189 CegarLoopUtils]: For program point L15-3(lines 15 18) no Hoare annotation was computed. [2020-12-23 07:50:30,440 INFO L192 CegarLoopUtils]: At program point L15-5(lines 14 20) the Hoare annotation is: true [2020-12-23 07:50:30,440 INFO L189 CegarLoopUtils]: For program point L34-1(lines 34 43) no Hoare annotation was computed. [2020-12-23 07:50:30,440 INFO L189 CegarLoopUtils]: For program point L-1(line -1) no Hoare annotation was computed. [2020-12-23 07:50:30,440 INFO L185 CegarLoopUtils]: At program point L34-3(lines 34 43) the Hoare annotation is: (let ((.cse0 (= ULTIMATE.start_main_~x~0 1))) (or (let ((.cse1 (= ULTIMATE.start_main_~z~0 0))) (let ((.cse2 (let ((.cse3 (+ ULTIMATE.start_main_~x~0 (- 1)))) (and (= (mod ULTIMATE.start_main_~y~0 ULTIMATE.start_main_~z~0) 0) (= (mod .cse3 ULTIMATE.start_main_~z~0) 0) (let ((.cse4 (div .cse3 ULTIMATE.start_main_~z~0))) (= (+ (* ULTIMATE.start_main_~z~0 (div ULTIMATE.start_main_~y~0 ULTIMATE.start_main_~z~0)) .cse4) (+ (* .cse4 ULTIMATE.start_main_~z~0) 1))) (not .cse1))))) (and (= 1 ULTIMATE.start___VERIFIER_assert_~cond) (or (and .cse0 .cse1) .cse2) (or .cse2 (= ULTIMATE.start_main_~y~0 0))))) (and .cse0 (<= ~counter~0 0) (= ULTIMATE.start_main_~y~0 1)))) [2020-12-23 07:50:30,441 INFO L189 CegarLoopUtils]: For program point L34-4(lines 34 43) no Hoare annotation was computed. [2020-12-23 07:50:30,441 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-12-23 07:50:30,441 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-12-23 07:50:30,441 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 17) no Hoare annotation was computed. [2020-12-23 07:50:30,441 INFO L189 CegarLoopUtils]: For program point L16(lines 16 17) no Hoare annotation was computed. [2020-12-23 07:50:30,441 INFO L189 CegarLoopUtils]: For program point L16-1(lines 16 17) no Hoare annotation was computed. [2020-12-23 07:50:30,442 INFO L192 CegarLoopUtils]: At program point L45(lines 24 46) the Hoare annotation is: true [2020-12-23 07:50:30,480 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.12 07:50:30 BoogieIcfgContainer [2020-12-23 07:50:30,483 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-23 07:50:30,484 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-23 07:50:30,484 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-23 07:50:30,484 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-23 07:50:30,485 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 07:46:22" (3/4) ... [2020-12-23 07:50:30,491 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-12-23 07:50:30,507 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 9 nodes and edges [2020-12-23 07:50:30,508 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2020-12-23 07:50:30,509 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-12-23 07:50:30,509 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-12-23 07:50:30,583 INFO L141 WitnessManager]: Wrote witness to /storage/repos/svcomp/c/nla-digbench-scaling/geo2-ll_unwindbound10.c-witness.graphml [2020-12-23 07:50:30,584 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-23 07:50:30,586 INFO L168 Benchmark]: Toolchain (without parser) took 248936.07 ms. Allocated memory is still 151.0 MB. Free memory was 126.5 MB in the beginning and 74.8 MB in the end (delta: 51.7 MB). Peak memory consumption was 52.2 MB. Max. memory is 8.0 GB. [2020-12-23 07:50:30,586 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 151.0 MB. Free memory is still 123.9 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-12-23 07:50:30,592 INFO L168 Benchmark]: CACSL2BoogieTranslator took 240.01 ms. Allocated memory is still 151.0 MB. Free memory was 126.2 MB in the beginning and 116.5 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-12-23 07:50:30,593 INFO L168 Benchmark]: Boogie Procedure Inliner took 40.61 ms. Allocated memory is still 151.0 MB. Free memory was 116.5 MB in the beginning and 115.0 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-12-23 07:50:30,593 INFO L168 Benchmark]: Boogie Preprocessor took 25.15 ms. Allocated memory is still 151.0 MB. Free memory was 115.0 MB in the beginning and 113.9 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-12-23 07:50:30,594 INFO L168 Benchmark]: RCFGBuilder took 544.53 ms. Allocated memory is still 151.0 MB. Free memory was 113.9 MB in the beginning and 101.8 MB in the end (delta: 12.2 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. [2020-12-23 07:50:30,594 INFO L168 Benchmark]: TraceAbstraction took 247977.87 ms. Allocated memory is still 151.0 MB. Free memory was 101.4 MB in the beginning and 77.4 MB in the end (delta: 24.0 MB). Peak memory consumption was 24.9 MB. Max. memory is 8.0 GB. [2020-12-23 07:50:30,595 INFO L168 Benchmark]: Witness Printer took 99.99 ms. Allocated memory is still 151.0 MB. Free memory was 77.4 MB in the beginning and 74.8 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-12-23 07:50:30,598 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 151.0 MB. Free memory is still 123.9 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 240.01 ms. Allocated memory is still 151.0 MB. Free memory was 126.2 MB in the beginning and 116.5 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 40.61 ms. Allocated memory is still 151.0 MB. Free memory was 116.5 MB in the beginning and 115.0 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 25.15 ms. Allocated memory is still 151.0 MB. Free memory was 115.0 MB in the beginning and 113.9 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 544.53 ms. Allocated memory is still 151.0 MB. Free memory was 113.9 MB in the beginning and 101.8 MB in the end (delta: 12.2 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. * TraceAbstraction took 247977.87 ms. Allocated memory is still 151.0 MB. Free memory was 101.4 MB in the beginning and 77.4 MB in the end (delta: 24.0 MB). Peak memory consumption was 24.9 MB. Max. memory is 8.0 GB. * Witness Printer took 99.99 ms. Allocated memory is still 151.0 MB. Free memory was 77.4 MB in the beginning and 74.8 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: 17]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 17]: 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 2 specifications checked. All of them hold - InvariantResult [Line: 34]: Loop Invariant Derived loop invariant: ((1 == cond && ((x == 1 && z == 0) || (((y % z == 0 && (x + -1) % z == 0) && z * (y / z) + (x + -1) / z == (x + -1) / z * z + 1) && !(z == 0)))) && ((((y % z == 0 && (x + -1) % z == 0) && z * (y / z) + (x + -1) / z == (x + -1) / z * z + 1) && !(z == 0)) || y == 0)) || ((x == 1 && counter <= 0) && y == 1) - InvariantResult [Line: 14]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 37]: Loop Invariant Derived loop invariant: ((1 == cond && z * y + x == z * x + 1) && ((((y % z == 0 && (x + -1) % z == 0) && z * (y / z) + (x + -1) / z == (x + -1) / z * z + 1) && !(z == 0)) || y == 0)) || (((counter <= 1 && 1 == cond) && z * y + x == z * x + 1) && y == 1) - InvariantResult [Line: 24]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 16 locations, 2 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 231.8s, OverallIterations: 8, TraceHistogramMax: 5, AutomataDifference: 196.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 16.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 75 SDtfs, 83 SDslu, 185 SDs, 0 SdLazy, 157 SolverSat, 41 SolverUnsat, 23 SolverUnknown, 0 SolverNotchecked, 48.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 134 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 168.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=24occurred in iteration=7, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 8 MinimizatonAttempts, 15 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 4 LocationsWithAnnotation, 4 PreInvPairs, 17 NumberOfFragments, 184 HoareAnnotationTreeSize, 4 FomulaSimplifications, 252 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 4 FomulaSimplificationsInter, 562 FormulaSimplificationTreeSizeReductionInter, 15.9s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 32.7s InterpolantComputationTime, 122 NumberOfCodeBlocks, 102 NumberOfCodeBlocksAsserted, 12 NumberOfCheckSat, 114 ConstructedInterpolants, 2 QuantifiedInterpolants, 13232 SizeOfPredicates, 45 NumberOfNonLiveVariables, 682 ConjunctsInSsa, 126 ConjunctsInUnsatCore, 8 InterpolantComputations, 3 PerfectInterpolantSequences, 64/104 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! [MP z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forcibly destroying the process Received shutdown request...