/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/array-programs/partial_mod_count_limited_3.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-dcfa08f [2020-12-23 00:41:04,054 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-23 00:41:04,059 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-23 00:41:04,123 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-23 00:41:04,123 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-23 00:41:04,129 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-23 00:41:04,133 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-23 00:41:04,139 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-23 00:41:04,143 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-23 00:41:04,149 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-23 00:41:04,154 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-23 00:41:04,156 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-23 00:41:04,156 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-23 00:41:04,160 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-23 00:41:04,162 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-23 00:41:04,164 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-23 00:41:04,166 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-23 00:41:04,169 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-23 00:41:04,178 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-23 00:41:04,186 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-23 00:41:04,189 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-23 00:41:04,193 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-23 00:41:04,194 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-23 00:41:04,195 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-23 00:41:04,205 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-23 00:41:04,206 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-23 00:41:04,208 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-23 00:41:04,210 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-23 00:41:04,210 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-23 00:41:04,213 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-23 00:41:04,213 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-23 00:41:04,214 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-23 00:41:04,216 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-23 00:41:04,217 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-23 00:41:04,219 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-23 00:41:04,219 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-23 00:41:04,220 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-23 00:41:04,224 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-23 00:41:04,225 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-23 00:41:04,230 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-23 00:41:04,231 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-23 00:41:04,232 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 00:41:04,285 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-23 00:41:04,286 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-23 00:41:04,291 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-23 00:41:04,291 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-23 00:41:04,291 INFO L138 SettingsManager]: * Use SBE=true [2020-12-23 00:41:04,292 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-23 00:41:04,292 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-23 00:41:04,292 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-23 00:41:04,292 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-23 00:41:04,293 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-23 00:41:04,294 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-23 00:41:04,294 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-23 00:41:04,295 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-23 00:41:04,295 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-23 00:41:04,296 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-23 00:41:04,296 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-23 00:41:04,296 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-23 00:41:04,296 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 00:41:04,296 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-23 00:41:04,297 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-23 00:41:04,297 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-23 00:41:04,297 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-23 00:41:04,297 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-23 00:41:04,297 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-23 00:41:04,298 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-23 00:41:04,298 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-23 00:41:04,769 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-23 00:41:04,814 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-23 00:41:04,817 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-23 00:41:04,819 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-23 00:41:04,820 INFO L275 PluginConnector]: CDTParser initialized [2020-12-23 00:41:04,821 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-programs/partial_mod_count_limited_3.c [2020-12-23 00:41:04,903 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/9503d307f/fb0053297e4749afa2cde82072240d74/FLAG20f2e4fe6 [2020-12-23 00:41:05,532 INFO L306 CDTParser]: Found 1 translation units. [2020-12-23 00:41:05,533 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-programs/partial_mod_count_limited_3.c [2020-12-23 00:41:05,544 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/9503d307f/fb0053297e4749afa2cde82072240d74/FLAG20f2e4fe6 [2020-12-23 00:41:05,901 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/9503d307f/fb0053297e4749afa2cde82072240d74 [2020-12-23 00:41:05,905 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-23 00:41:05,909 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-23 00:41:05,913 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-23 00:41:05,914 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-23 00:41:05,918 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-23 00:41:05,919 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 12:41:05" (1/1) ... [2020-12-23 00:41:05,923 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1b2fbfae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:41:05, skipping insertion in model container [2020-12-23 00:41:05,923 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 12:41:05" (1/1) ... [2020-12-23 00:41:05,935 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-23 00:41:05,957 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-23 00:41:06,159 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/array-programs/partial_mod_count_limited_3.c[331,344] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~a~0,],[IdentifierExpression[~i~0,]]] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~a~0,],[IdentifierExpression[~i~0,]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] [2020-12-23 00:41:06,186 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 00:41:06,196 INFO L203 MainTranslator]: Completed pre-run [2020-12-23 00:41:06,210 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/array-programs/partial_mod_count_limited_3.c[331,344] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#a~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#a~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~0,]]]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#a~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#a~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] [2020-12-23 00:41:06,225 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 00:41:06,243 INFO L208 MainTranslator]: Completed translation [2020-12-23 00:41:06,244 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:41:06 WrapperNode [2020-12-23 00:41:06,244 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-23 00:41:06,245 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-23 00:41:06,246 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-23 00:41:06,246 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-23 00:41:06,256 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:41:06" (1/1) ... [2020-12-23 00:41:06,265 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:41:06" (1/1) ... [2020-12-23 00:41:06,306 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-23 00:41:06,309 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-23 00:41:06,309 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-23 00:41:06,309 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-23 00:41:06,324 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:41:06" (1/1) ... [2020-12-23 00:41:06,325 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:41:06" (1/1) ... [2020-12-23 00:41:06,339 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:41:06" (1/1) ... [2020-12-23 00:41:06,340 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:41:06" (1/1) ... [2020-12-23 00:41:06,353 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:41:06" (1/1) ... [2020-12-23 00:41:06,366 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:41:06" (1/1) ... [2020-12-23 00:41:06,369 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:41:06" (1/1) ... [2020-12-23 00:41:06,371 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-23 00:41:06,373 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-23 00:41:06,373 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-23 00:41:06,373 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-23 00:41:06,374 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:41:06" (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 00:41:06,496 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-23 00:41:06,497 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-23 00:41:06,497 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-23 00:41:06,497 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-23 00:41:06,497 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-23 00:41:06,497 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-23 00:41:06,497 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-23 00:41:07,032 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-23 00:41:07,032 INFO L299 CfgBuilder]: Removed 10 assume(true) statements. [2020-12-23 00:41:07,034 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 12:41:07 BoogieIcfgContainer [2020-12-23 00:41:07,034 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-23 00:41:07,036 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-23 00:41:07,036 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-23 00:41:07,040 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-23 00:41:07,040 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.12 12:41:05" (1/3) ... [2020-12-23 00:41:07,042 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a60bed1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 12:41:07, skipping insertion in model container [2020-12-23 00:41:07,042 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:41:06" (2/3) ... [2020-12-23 00:41:07,042 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a60bed1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 12:41:07, skipping insertion in model container [2020-12-23 00:41:07,042 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 12:41:07" (3/3) ... [2020-12-23 00:41:07,044 INFO L111 eAbstractionObserver]: Analyzing ICFG partial_mod_count_limited_3.c [2020-12-23 00:41:07,052 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-23 00:41:07,058 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-23 00:41:07,103 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-23 00:41:07,177 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-23 00:41:07,177 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-23 00:41:07,177 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-23 00:41:07,177 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-23 00:41:07,177 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-23 00:41:07,178 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-23 00:41:07,178 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-23 00:41:07,182 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-23 00:41:07,202 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2020-12-23 00:41:07,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-23 00:41:07,217 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:41:07,218 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:41:07,223 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:41:07,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:41:07,232 INFO L82 PathProgramCache]: Analyzing trace with hash -1939796378, now seen corresponding path program 1 times [2020-12-23 00:41:07,243 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:41:07,243 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897651111] [2020-12-23 00:41:07,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:41:07,409 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:41:07,411 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1603356062] [2020-12-23 00:41:07,411 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 00:41:07,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:41:07,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 1 conjunts are in the unsatisfiable core [2020-12-23 00:41:07,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:41:07,536 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 00:41:07,538 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897651111] [2020-12-23 00:41:07,539 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:41:07,539 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1603356062] [2020-12-23 00:41:07,540 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 00:41:07,540 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-23 00:41:07,541 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327869813] [2020-12-23 00:41:07,547 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-23 00:41:07,548 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:41:07,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-23 00:41:07,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-23 00:41:07,580 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 2 states. [2020-12-23 00:41:07,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:41:07,603 INFO L93 Difference]: Finished difference Result 39 states and 54 transitions. [2020-12-23 00:41:07,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-23 00:41:07,605 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 11 [2020-12-23 00:41:07,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:41:07,620 INFO L225 Difference]: With dead ends: 39 [2020-12-23 00:41:07,620 INFO L226 Difference]: Without dead ends: 17 [2020-12-23 00:41:07,625 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-23 00:41:07,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-12-23 00:41:07,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-12-23 00:41:07,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-12-23 00:41:07,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2020-12-23 00:41:07,672 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 11 [2020-12-23 00:41:07,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:41:07,674 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2020-12-23 00:41:07,674 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-23 00:41:07,675 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2020-12-23 00:41:07,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-23 00:41:07,676 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:41:07,676 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:41:07,891 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2020-12-23 00:41:07,892 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:41:07,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:41:07,893 INFO L82 PathProgramCache]: Analyzing trace with hash -54935082, now seen corresponding path program 1 times [2020-12-23 00:41:07,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:41:07,893 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765379387] [2020-12-23 00:41:07,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:41:07,914 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:41:07,918 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [950150999] [2020-12-23 00:41:07,918 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 00:41:07,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:41:07,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-23 00:41:07,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:41:08,082 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 00:41:08,082 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765379387] [2020-12-23 00:41:08,083 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:41:08,083 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [950150999] [2020-12-23 00:41:08,083 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 00:41:08,083 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 00:41:08,084 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812541458] [2020-12-23 00:41:08,085 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 00:41:08,086 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:41:08,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 00:41:08,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-23 00:41:08,087 INFO L87 Difference]: Start difference. First operand 17 states and 21 transitions. Second operand 4 states. [2020-12-23 00:41:08,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:41:08,181 INFO L93 Difference]: Finished difference Result 42 states and 54 transitions. [2020-12-23 00:41:08,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 00:41:08,182 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2020-12-23 00:41:08,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:41:08,183 INFO L225 Difference]: With dead ends: 42 [2020-12-23 00:41:08,183 INFO L226 Difference]: Without dead ends: 29 [2020-12-23 00:41:08,184 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-23 00:41:08,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-12-23 00:41:08,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 19. [2020-12-23 00:41:08,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-12-23 00:41:08,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2020-12-23 00:41:08,190 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 11 [2020-12-23 00:41:08,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:41:08,191 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2020-12-23 00:41:08,191 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 00:41:08,191 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2020-12-23 00:41:08,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-23 00:41:08,192 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:41:08,192 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:41:08,406 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:41:08,407 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:41:08,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:41:08,409 INFO L82 PathProgramCache]: Analyzing trace with hash 1485448361, now seen corresponding path program 1 times [2020-12-23 00:41:08,410 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:41:08,410 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533916802] [2020-12-23 00:41:08,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:41:08,423 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:41:08,423 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1520923231] [2020-12-23 00:41:08,424 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 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 00:41:08,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:41:08,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-23 00:41:08,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:41:08,562 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:41:08,562 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533916802] [2020-12-23 00:41:08,563 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:41:08,563 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1520923231] [2020-12-23 00:41:08,563 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:41:08,563 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-12-23 00:41:08,564 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332508759] [2020-12-23 00:41:08,564 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 00:41:08,564 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:41:08,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 00:41:08,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-23 00:41:08,566 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand 5 states. [2020-12-23 00:41:08,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:41:08,670 INFO L93 Difference]: Finished difference Result 54 states and 68 transitions. [2020-12-23 00:41:08,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 00:41:08,671 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-12-23 00:41:08,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:41:08,672 INFO L225 Difference]: With dead ends: 54 [2020-12-23 00:41:08,672 INFO L226 Difference]: Without dead ends: 41 [2020-12-23 00:41:08,674 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-23 00:41:08,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-12-23 00:41:08,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 24. [2020-12-23 00:41:08,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-12-23 00:41:08,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 29 transitions. [2020-12-23 00:41:08,680 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 29 transitions. Word has length 16 [2020-12-23 00:41:08,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:41:08,680 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 29 transitions. [2020-12-23 00:41:08,680 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 00:41:08,680 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 29 transitions. [2020-12-23 00:41:08,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-12-23 00:41:08,681 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:41:08,681 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:41:08,894 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:41:08,895 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:41:08,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:41:08,897 INFO L82 PathProgramCache]: Analyzing trace with hash -2118808138, now seen corresponding path program 2 times [2020-12-23 00:41:08,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:41:08,898 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929905111] [2020-12-23 00:41:08,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:41:08,912 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:41:08,914 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [906964004] [2020-12-23 00:41:08,914 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 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 00:41:09,006 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-12-23 00:41:09,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:41:09,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-23 00:41:09,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:41:09,079 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-23 00:41:09,080 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929905111] [2020-12-23 00:41:09,080 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:41:09,080 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [906964004] [2020-12-23 00:41:09,081 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 00:41:09,081 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-23 00:41:09,081 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142088792] [2020-12-23 00:41:09,082 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 00:41:09,082 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:41:09,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 00:41:09,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-23 00:41:09,083 INFO L87 Difference]: Start difference. First operand 24 states and 29 transitions. Second operand 5 states. [2020-12-23 00:41:09,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:41:09,210 INFO L93 Difference]: Finished difference Result 35 states and 42 transitions. [2020-12-23 00:41:09,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 00:41:09,210 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 21 [2020-12-23 00:41:09,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:41:09,213 INFO L225 Difference]: With dead ends: 35 [2020-12-23 00:41:09,213 INFO L226 Difference]: Without dead ends: 33 [2020-12-23 00:41:09,214 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-12-23 00:41:09,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-12-23 00:41:09,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 29. [2020-12-23 00:41:09,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-12-23 00:41:09,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 35 transitions. [2020-12-23 00:41:09,222 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 35 transitions. Word has length 21 [2020-12-23 00:41:09,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:41:09,223 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 35 transitions. [2020-12-23 00:41:09,223 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 00:41:09,223 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 35 transitions. [2020-12-23 00:41:09,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-12-23 00:41:09,224 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:41:09,224 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:41:09,437 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:41:09,439 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:41:09,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:41:09,440 INFO L82 PathProgramCache]: Analyzing trace with hash -2118867720, now seen corresponding path program 1 times [2020-12-23 00:41:09,440 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:41:09,441 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667376285] [2020-12-23 00:41:09,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:41:09,457 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:41:09,457 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [705716763] [2020-12-23 00:41:09,458 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 00:41:09,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:41:09,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-23 00:41:09,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:41:09,610 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:41:09,610 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667376285] [2020-12-23 00:41:09,611 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:41:09,611 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [705716763] [2020-12-23 00:41:09,611 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:41:09,611 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-12-23 00:41:09,612 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227473878] [2020-12-23 00:41:09,612 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 00:41:09,613 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:41:09,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 00:41:09,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-23 00:41:09,614 INFO L87 Difference]: Start difference. First operand 29 states and 35 transitions. Second operand 6 states. [2020-12-23 00:41:09,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:41:09,717 INFO L93 Difference]: Finished difference Result 89 states and 109 transitions. [2020-12-23 00:41:09,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 00:41:09,718 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 21 [2020-12-23 00:41:09,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:41:09,719 INFO L225 Difference]: With dead ends: 89 [2020-12-23 00:41:09,719 INFO L226 Difference]: Without dead ends: 71 [2020-12-23 00:41:09,720 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-23 00:41:09,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-12-23 00:41:09,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 34. [2020-12-23 00:41:09,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-12-23 00:41:09,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 41 transitions. [2020-12-23 00:41:09,728 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 41 transitions. Word has length 21 [2020-12-23 00:41:09,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:41:09,729 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 41 transitions. [2020-12-23 00:41:09,729 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 00:41:09,729 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 41 transitions. [2020-12-23 00:41:09,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-23 00:41:09,730 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:41:09,730 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:41:09,944 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:41:09,945 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:41:09,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:41:09,946 INFO L82 PathProgramCache]: Analyzing trace with hash -1636705269, now seen corresponding path program 2 times [2020-12-23 00:41:09,946 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:41:09,947 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327959901] [2020-12-23 00:41:09,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:41:09,959 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:41:09,960 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [252450328] [2020-12-23 00:41:09,960 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 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 00:41:10,058 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-12-23 00:41:10,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:41:10,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-23 00:41:10,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:41:10,199 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-12-23 00:41:10,200 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327959901] [2020-12-23 00:41:10,200 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:41:10,200 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [252450328] [2020-12-23 00:41:10,200 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 00:41:10,200 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-23 00:41:10,201 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781476698] [2020-12-23 00:41:10,201 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-23 00:41:10,201 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:41:10,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-23 00:41:10,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-23 00:41:10,203 INFO L87 Difference]: Start difference. First operand 34 states and 41 transitions. Second operand 7 states. [2020-12-23 00:41:10,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:41:10,330 INFO L93 Difference]: Finished difference Result 46 states and 55 transitions. [2020-12-23 00:41:10,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-23 00:41:10,331 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 26 [2020-12-23 00:41:10,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:41:10,332 INFO L225 Difference]: With dead ends: 46 [2020-12-23 00:41:10,332 INFO L226 Difference]: Without dead ends: 44 [2020-12-23 00:41:10,333 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-12-23 00:41:10,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-12-23 00:41:10,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 39. [2020-12-23 00:41:10,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-12-23 00:41:10,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 47 transitions. [2020-12-23 00:41:10,346 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 47 transitions. Word has length 26 [2020-12-23 00:41:10,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:41:10,346 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 47 transitions. [2020-12-23 00:41:10,346 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-23 00:41:10,347 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 47 transitions. [2020-12-23 00:41:10,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-12-23 00:41:10,348 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:41:10,348 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:41:10,562 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:41:10,563 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:41:10,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:41:10,564 INFO L82 PathProgramCache]: Analyzing trace with hash 1380764901, now seen corresponding path program 1 times [2020-12-23 00:41:10,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:41:10,565 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787635453] [2020-12-23 00:41:10,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:41:10,577 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:41:10,577 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [322418594] [2020-12-23 00:41:10,577 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 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 00:41:10,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:41:10,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-23 00:41:10,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:41:10,738 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-23 00:41:10,738 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787635453] [2020-12-23 00:41:10,739 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:41:10,739 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [322418594] [2020-12-23 00:41:10,739 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:41:10,739 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-12-23 00:41:10,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106301978] [2020-12-23 00:41:10,740 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-23 00:41:10,740 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:41:10,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-23 00:41:10,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-23 00:41:10,741 INFO L87 Difference]: Start difference. First operand 39 states and 47 transitions. Second operand 7 states. [2020-12-23 00:41:10,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:41:10,848 INFO L93 Difference]: Finished difference Result 127 states and 154 transitions. [2020-12-23 00:41:10,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-23 00:41:10,849 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 31 [2020-12-23 00:41:10,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:41:10,851 INFO L225 Difference]: With dead ends: 127 [2020-12-23 00:41:10,851 INFO L226 Difference]: Without dead ends: 104 [2020-12-23 00:41:10,851 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-23 00:41:10,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-12-23 00:41:10,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 44. [2020-12-23 00:41:10,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-12-23 00:41:10,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 53 transitions. [2020-12-23 00:41:10,860 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 53 transitions. Word has length 31 [2020-12-23 00:41:10,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:41:10,861 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 53 transitions. [2020-12-23 00:41:10,861 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-23 00:41:10,861 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 53 transitions. [2020-12-23 00:41:10,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-12-23 00:41:10,862 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:41:10,862 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:41:11,076 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:41:11,077 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:41:11,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:41:11,078 INFO L82 PathProgramCache]: Analyzing trace with hash -1775597512, now seen corresponding path program 2 times [2020-12-23 00:41:11,078 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:41:11,078 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654887985] [2020-12-23 00:41:11,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:41:11,089 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:41:11,089 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [610532891] [2020-12-23 00:41:11,089 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 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 00:41:11,210 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 00:41:11,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:41:11,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-23 00:41:11,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:41:11,320 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-23 00:41:11,321 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654887985] [2020-12-23 00:41:11,321 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:41:11,321 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [610532891] [2020-12-23 00:41:11,321 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:41:11,321 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-12-23 00:41:11,322 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078834010] [2020-12-23 00:41:11,322 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-23 00:41:11,322 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:41:11,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-23 00:41:11,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-23 00:41:11,323 INFO L87 Difference]: Start difference. First operand 44 states and 53 transitions. Second operand 8 states. [2020-12-23 00:41:11,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:41:11,443 INFO L93 Difference]: Finished difference Result 149 states and 180 transitions. [2020-12-23 00:41:11,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-23 00:41:11,443 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 36 [2020-12-23 00:41:11,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:41:11,445 INFO L225 Difference]: With dead ends: 149 [2020-12-23 00:41:11,445 INFO L226 Difference]: Without dead ends: 126 [2020-12-23 00:41:11,446 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-23 00:41:11,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-12-23 00:41:11,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 49. [2020-12-23 00:41:11,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-12-23 00:41:11,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 59 transitions. [2020-12-23 00:41:11,454 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 59 transitions. Word has length 36 [2020-12-23 00:41:11,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:41:11,455 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 59 transitions. [2020-12-23 00:41:11,455 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-23 00:41:11,455 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 59 transitions. [2020-12-23 00:41:11,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-12-23 00:41:11,456 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:41:11,456 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:41:11,662 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2020-12-23 00:41:11,663 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:41:11,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:41:11,664 INFO L82 PathProgramCache]: Analyzing trace with hash -599004987, now seen corresponding path program 3 times [2020-12-23 00:41:11,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:41:11,665 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836969344] [2020-12-23 00:41:11,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:41:11,674 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:41:11,675 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2143528968] [2020-12-23 00:41:11,675 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 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:41:11,832 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-23 00:41:11,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:41:11,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 23 conjunts are in the unsatisfiable core [2020-12-23 00:41:11,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:41:12,034 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2020-12-23 00:41:12,034 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836969344] [2020-12-23 00:41:12,035 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:41:12,035 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2143528968] [2020-12-23 00:41:12,035 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:41:12,035 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-12-23 00:41:12,035 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843868840] [2020-12-23 00:41:12,036 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-23 00:41:12,036 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:41:12,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-23 00:41:12,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-12-23 00:41:12,037 INFO L87 Difference]: Start difference. First operand 49 states and 59 transitions. Second operand 8 states. [2020-12-23 00:41:12,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:41:12,191 INFO L93 Difference]: Finished difference Result 61 states and 73 transitions. [2020-12-23 00:41:12,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-23 00:41:12,192 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 41 [2020-12-23 00:41:12,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:41:12,192 INFO L225 Difference]: With dead ends: 61 [2020-12-23 00:41:12,193 INFO L226 Difference]: Without dead ends: 59 [2020-12-23 00:41:12,193 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-12-23 00:41:12,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-12-23 00:41:12,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 54. [2020-12-23 00:41:12,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-12-23 00:41:12,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 65 transitions. [2020-12-23 00:41:12,201 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 65 transitions. Word has length 41 [2020-12-23 00:41:12,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:41:12,201 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 65 transitions. [2020-12-23 00:41:12,201 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-23 00:41:12,201 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 65 transitions. [2020-12-23 00:41:12,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-12-23 00:41:12,202 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:41:12,203 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:41:12,416 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:41:12,417 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:41:12,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:41:12,418 INFO L82 PathProgramCache]: Analyzing trace with hash 1681892459, now seen corresponding path program 4 times [2020-12-23 00:41:12,419 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:41:12,419 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037922462] [2020-12-23 00:41:12,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:41:12,429 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:41:12,429 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [888079495] [2020-12-23 00:41:12,429 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 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:41:12,489 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 00:41:12,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:41:12,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-23 00:41:12,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:41:12,574 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2020-12-23 00:41:12,575 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:41:12,582 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:41:12,584 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:41:12,584 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:17 [2020-12-23 00:41:12,612 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2020-12-23 00:41:12,613 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:41:12,615 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:41:12,616 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:41:12,616 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:19, output treesize:3 [2020-12-23 00:41:12,653 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 30 proven. 4 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2020-12-23 00:41:12,653 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037922462] [2020-12-23 00:41:12,653 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:41:12,653 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [888079495] [2020-12-23 00:41:12,654 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:41:12,654 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-12-23 00:41:12,654 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698309249] [2020-12-23 00:41:12,655 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 00:41:12,655 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:41:12,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 00:41:12,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-23 00:41:12,656 INFO L87 Difference]: Start difference. First operand 54 states and 65 transitions. Second operand 6 states. [2020-12-23 00:41:12,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:41:12,731 INFO L93 Difference]: Finished difference Result 116 states and 139 transitions. [2020-12-23 00:41:12,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 00:41:12,732 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 46 [2020-12-23 00:41:12,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:41:12,732 INFO L225 Difference]: With dead ends: 116 [2020-12-23 00:41:12,733 INFO L226 Difference]: Without dead ends: 75 [2020-12-23 00:41:12,733 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-23 00:41:12,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-12-23 00:41:12,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 54. [2020-12-23 00:41:12,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-12-23 00:41:12,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 64 transitions. [2020-12-23 00:41:12,740 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 64 transitions. Word has length 46 [2020-12-23 00:41:12,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:41:12,741 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 64 transitions. [2020-12-23 00:41:12,741 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 00:41:12,741 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 64 transitions. [2020-12-23 00:41:12,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-12-23 00:41:12,742 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:41:12,742 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:41:12,956 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:41:12,957 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:41:12,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:41:12,958 INFO L82 PathProgramCache]: Analyzing trace with hash -562090839, now seen corresponding path program 1 times [2020-12-23 00:41:12,958 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:41:12,959 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413346698] [2020-12-23 00:41:12,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:41:12,972 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:41:12,973 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1225374165] [2020-12-23 00:41:12,973 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 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:41:13,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:41:13,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-23 00:41:13,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:41:13,188 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-12-23 00:41:13,189 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413346698] [2020-12-23 00:41:13,189 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:41:13,190 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1225374165] [2020-12-23 00:41:13,190 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:41:13,190 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-12-23 00:41:13,190 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613754026] [2020-12-23 00:41:13,191 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-23 00:41:13,191 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:41:13,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-23 00:41:13,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-23 00:41:13,199 INFO L87 Difference]: Start difference. First operand 54 states and 64 transitions. Second operand 9 states. [2020-12-23 00:41:13,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:41:13,340 INFO L93 Difference]: Finished difference Result 197 states and 236 transitions. [2020-12-23 00:41:13,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-23 00:41:13,341 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 46 [2020-12-23 00:41:13,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:41:13,342 INFO L225 Difference]: With dead ends: 197 [2020-12-23 00:41:13,342 INFO L226 Difference]: Without dead ends: 169 [2020-12-23 00:41:13,343 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-23 00:41:13,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2020-12-23 00:41:13,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 59. [2020-12-23 00:41:13,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-12-23 00:41:13,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 70 transitions. [2020-12-23 00:41:13,351 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 70 transitions. Word has length 46 [2020-12-23 00:41:13,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:41:13,352 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 70 transitions. [2020-12-23 00:41:13,352 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-23 00:41:13,352 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 70 transitions. [2020-12-23 00:41:13,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-12-23 00:41:13,353 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:41:13,353 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:41:13,566 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2020-12-23 00:41:13,567 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:41:13,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:41:13,568 INFO L82 PathProgramCache]: Analyzing trace with hash -1943967942, now seen corresponding path program 2 times [2020-12-23 00:41:13,568 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:41:13,568 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363798805] [2020-12-23 00:41:13,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:41:13,576 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:41:13,577 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1939026433] [2020-12-23 00:41:13,577 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 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:41:13,703 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 00:41:13,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:41:13,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-23 00:41:13,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:41:13,876 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-12-23 00:41:13,877 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363798805] [2020-12-23 00:41:13,877 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:41:13,878 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1939026433] [2020-12-23 00:41:13,878 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:41:13,878 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-12-23 00:41:13,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289331190] [2020-12-23 00:41:13,879 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-23 00:41:13,879 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:41:13,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-23 00:41:13,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-12-23 00:41:13,880 INFO L87 Difference]: Start difference. First operand 59 states and 70 transitions. Second operand 10 states. [2020-12-23 00:41:14,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:41:14,072 INFO L93 Difference]: Finished difference Result 224 states and 268 transitions. [2020-12-23 00:41:14,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-23 00:41:14,073 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 51 [2020-12-23 00:41:14,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:41:14,075 INFO L225 Difference]: With dead ends: 224 [2020-12-23 00:41:14,075 INFO L226 Difference]: Without dead ends: 196 [2020-12-23 00:41:14,076 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-12-23 00:41:14,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-12-23 00:41:14,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 64. [2020-12-23 00:41:14,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-12-23 00:41:14,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 76 transitions. [2020-12-23 00:41:14,092 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 76 transitions. Word has length 51 [2020-12-23 00:41:14,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:41:14,094 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 76 transitions. [2020-12-23 00:41:14,094 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-23 00:41:14,094 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 76 transitions. [2020-12-23 00:41:14,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-12-23 00:41:14,096 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:41:14,097 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:41:14,310 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:41:14,311 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:41:14,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:41:14,312 INFO L82 PathProgramCache]: Analyzing trace with hash 71442249, now seen corresponding path program 3 times [2020-12-23 00:41:14,312 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:41:14,313 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482082885] [2020-12-23 00:41:14,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:41:14,321 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:41:14,322 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1727815467] [2020-12-23 00:41:14,322 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 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:41:14,465 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-23 00:41:14,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:41:14,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-23 00:41:14,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:41:14,508 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2020-12-23 00:41:14,509 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:41:14,515 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:41:14,516 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:41:14,516 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:17 [2020-12-23 00:41:14,534 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 9 [2020-12-23 00:41:14,536 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:41:14,541 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:41:14,542 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:41:14,542 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:28, output treesize:9 [2020-12-23 00:41:14,609 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2020-12-23 00:41:14,609 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482082885] [2020-12-23 00:41:14,609 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:41:14,609 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1727815467] [2020-12-23 00:41:14,610 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 00:41:14,610 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-23 00:41:14,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850088311] [2020-12-23 00:41:14,610 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-23 00:41:14,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:41:14,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-23 00:41:14,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2020-12-23 00:41:14,611 INFO L87 Difference]: Start difference. First operand 64 states and 76 transitions. Second operand 7 states. [2020-12-23 00:41:14,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:41:14,757 INFO L93 Difference]: Finished difference Result 136 states and 163 transitions. [2020-12-23 00:41:14,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-23 00:41:14,758 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 56 [2020-12-23 00:41:14,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:41:14,759 INFO L225 Difference]: With dead ends: 136 [2020-12-23 00:41:14,760 INFO L226 Difference]: Without dead ends: 108 [2020-12-23 00:41:14,760 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2020-12-23 00:41:14,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-12-23 00:41:14,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 66. [2020-12-23 00:41:14,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-12-23 00:41:14,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 79 transitions. [2020-12-23 00:41:14,767 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 79 transitions. Word has length 56 [2020-12-23 00:41:14,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:41:14,768 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 79 transitions. [2020-12-23 00:41:14,768 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-23 00:41:14,768 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 79 transitions. [2020-12-23 00:41:14,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-12-23 00:41:14,769 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:41:14,769 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 5, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:41:14,983 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-12-23 00:41:14,984 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:41:14,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:41:14,985 INFO L82 PathProgramCache]: Analyzing trace with hash -1617501493, now seen corresponding path program 4 times [2020-12-23 00:41:14,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:41:14,985 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000614749] [2020-12-23 00:41:14,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:41:14,994 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:41:14,995 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2036851664] [2020-12-23 00:41:14,995 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 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:41:15,051 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 00:41:15,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:41:15,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-23 00:41:15,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:41:15,067 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2020-12-23 00:41:15,068 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:41:15,074 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:41:15,075 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:41:15,075 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:17 [2020-12-23 00:41:15,091 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2020-12-23 00:41:15,092 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:41:15,094 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:41:15,095 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:41:15,095 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:15, output treesize:3 [2020-12-23 00:41:15,130 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-12-23 00:41:15,130 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000614749] [2020-12-23 00:41:15,131 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:41:15,131 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2036851664] [2020-12-23 00:41:15,131 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 00:41:15,131 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-23 00:41:15,131 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735607115] [2020-12-23 00:41:15,132 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 00:41:15,132 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:41:15,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 00:41:15,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-23 00:41:15,133 INFO L87 Difference]: Start difference. First operand 66 states and 79 transitions. Second operand 5 states. [2020-12-23 00:41:15,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:41:15,183 INFO L93 Difference]: Finished difference Result 132 states and 158 transitions. [2020-12-23 00:41:15,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 00:41:15,183 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 56 [2020-12-23 00:41:15,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:41:15,184 INFO L225 Difference]: With dead ends: 132 [2020-12-23 00:41:15,184 INFO L226 Difference]: Without dead ends: 74 [2020-12-23 00:41:15,185 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-12-23 00:41:15,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-12-23 00:41:15,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 66. [2020-12-23 00:41:15,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-12-23 00:41:15,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 78 transitions. [2020-12-23 00:41:15,191 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 78 transitions. Word has length 56 [2020-12-23 00:41:15,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:41:15,191 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 78 transitions. [2020-12-23 00:41:15,191 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 00:41:15,192 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 78 transitions. [2020-12-23 00:41:15,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-12-23 00:41:15,192 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:41:15,193 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:41:15,405 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:41:15,406 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:41:15,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:41:15,406 INFO L82 PathProgramCache]: Analyzing trace with hash -1633020211, now seen corresponding path program 5 times [2020-12-23 00:41:15,406 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:41:15,407 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286933575] [2020-12-23 00:41:15,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:41:15,414 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:41:15,415 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [809060311] [2020-12-23 00:41:15,415 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 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:41:15,456 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-12-23 00:41:15,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:41:15,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-23 00:41:15,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:41:15,480 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2020-12-23 00:41:15,481 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:41:15,483 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:41:15,484 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:41:15,484 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:17, output treesize:13 [2020-12-23 00:41:15,596 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:41:15,597 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 71 [2020-12-23 00:41:15,601 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:41:15,627 INFO L625 ElimStorePlain]: treesize reduction 30, result has 55.2 percent of original size [2020-12-23 00:41:15,630 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-23 00:41:15,631 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:37 [2020-12-23 00:41:15,688 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:41:15,689 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 30 [2020-12-23 00:41:15,692 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:41:15,723 INFO L625 ElimStorePlain]: treesize reduction 12, result has 57.1 percent of original size [2020-12-23 00:41:15,725 INFO L547 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:41:15,726 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:48, output treesize:3 [2020-12-23 00:41:15,759 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 83 proven. 1 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2020-12-23 00:41:15,760 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286933575] [2020-12-23 00:41:15,760 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:41:15,760 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [809060311] [2020-12-23 00:41:15,760 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:41:15,760 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-12-23 00:41:15,760 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472486434] [2020-12-23 00:41:15,761 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-23 00:41:15,761 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:41:15,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-23 00:41:15,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-12-23 00:41:15,762 INFO L87 Difference]: Start difference. First operand 66 states and 78 transitions. Second operand 8 states. [2020-12-23 00:41:15,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:41:15,910 INFO L93 Difference]: Finished difference Result 140 states and 169 transitions. [2020-12-23 00:41:15,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-23 00:41:15,911 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 56 [2020-12-23 00:41:15,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:41:15,912 INFO L225 Difference]: With dead ends: 140 [2020-12-23 00:41:15,912 INFO L226 Difference]: Without dead ends: 97 [2020-12-23 00:41:15,915 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2020-12-23 00:41:15,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-12-23 00:41:15,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 91. [2020-12-23 00:41:15,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-12-23 00:41:15,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 106 transitions. [2020-12-23 00:41:15,927 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 106 transitions. Word has length 56 [2020-12-23 00:41:15,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:41:15,927 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 106 transitions. [2020-12-23 00:41:15,927 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-23 00:41:15,928 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 106 transitions. [2020-12-23 00:41:15,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-12-23 00:41:15,928 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:41:15,928 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:41:16,141 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-12-23 00:41:16,142 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:41:16,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:41:16,143 INFO L82 PathProgramCache]: Analyzing trace with hash 1670153675, now seen corresponding path program 6 times [2020-12-23 00:41:16,143 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:41:16,144 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964852988] [2020-12-23 00:41:16,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:41:16,152 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:41:16,152 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1006317687] [2020-12-23 00:41:16,152 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 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:41:16,384 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-12-23 00:41:16,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:41:16,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 30 conjunts are in the unsatisfiable core [2020-12-23 00:41:16,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:41:16,647 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2020-12-23 00:41:16,648 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964852988] [2020-12-23 00:41:16,648 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:41:16,648 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1006317687] [2020-12-23 00:41:16,648 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:41:16,649 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-12-23 00:41:16,649 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391550190] [2020-12-23 00:41:16,649 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-23 00:41:16,649 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:41:16,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-23 00:41:16,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-12-23 00:41:16,650 INFO L87 Difference]: Start difference. First operand 91 states and 106 transitions. Second operand 10 states. [2020-12-23 00:41:16,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:41:16,878 INFO L93 Difference]: Finished difference Result 103 states and 120 transitions. [2020-12-23 00:41:16,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-23 00:41:16,878 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 56 [2020-12-23 00:41:16,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:41:16,879 INFO L225 Difference]: With dead ends: 103 [2020-12-23 00:41:16,880 INFO L226 Difference]: Without dead ends: 101 [2020-12-23 00:41:16,880 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-12-23 00:41:16,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-12-23 00:41:16,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 96. [2020-12-23 00:41:16,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-12-23 00:41:16,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 112 transitions. [2020-12-23 00:41:16,909 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 112 transitions. Word has length 56 [2020-12-23 00:41:16,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:41:16,909 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 112 transitions. [2020-12-23 00:41:16,909 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-23 00:41:16,909 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 112 transitions. [2020-12-23 00:41:16,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-12-23 00:41:16,910 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:41:16,910 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:41:17,123 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-12-23 00:41:17,124 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:41:17,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:41:17,125 INFO L82 PathProgramCache]: Analyzing trace with hash 1477851941, now seen corresponding path program 7 times [2020-12-23 00:41:17,126 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:41:17,126 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808764995] [2020-12-23 00:41:17,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:41:17,134 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:41:17,134 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [803778397] [2020-12-23 00:41:17,134 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:41:17,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:41:17,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-23 00:41:17,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:41:17,371 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2020-12-23 00:41:17,371 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808764995] [2020-12-23 00:41:17,372 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:41:17,372 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [803778397] [2020-12-23 00:41:17,372 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:41:17,372 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-12-23 00:41:17,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786052383] [2020-12-23 00:41:17,373 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-23 00:41:17,373 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:41:17,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-23 00:41:17,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-23 00:41:17,374 INFO L87 Difference]: Start difference. First operand 96 states and 112 transitions. Second operand 11 states. [2020-12-23 00:41:17,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:41:17,559 INFO L93 Difference]: Finished difference Result 336 states and 400 transitions. [2020-12-23 00:41:17,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-23 00:41:17,560 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 61 [2020-12-23 00:41:17,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:41:17,562 INFO L225 Difference]: With dead ends: 336 [2020-12-23 00:41:17,562 INFO L226 Difference]: Without dead ends: 291 [2020-12-23 00:41:17,563 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-23 00:41:17,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2020-12-23 00:41:17,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 106. [2020-12-23 00:41:17,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-12-23 00:41:17,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 123 transitions. [2020-12-23 00:41:17,572 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 123 transitions. Word has length 61 [2020-12-23 00:41:17,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:41:17,573 INFO L481 AbstractCegarLoop]: Abstraction has 106 states and 123 transitions. [2020-12-23 00:41:17,573 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-23 00:41:17,573 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 123 transitions. [2020-12-23 00:41:17,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-23 00:41:17,573 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:41:17,574 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:41:17,788 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-12-23 00:41:17,789 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:41:17,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:41:17,790 INFO L82 PathProgramCache]: Analyzing trace with hash -1255875722, now seen corresponding path program 8 times [2020-12-23 00:41:17,790 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:41:17,790 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143618626] [2020-12-23 00:41:17,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:41:17,802 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:41:17,802 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1846139004] [2020-12-23 00:41:17,802 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 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:41:17,930 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 00:41:17,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:41:17,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-23 00:41:17,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:41:18,157 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 0 proven. 148 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2020-12-23 00:41:18,158 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143618626] [2020-12-23 00:41:18,158 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:41:18,158 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1846139004] [2020-12-23 00:41:18,158 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:41:18,158 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-12-23 00:41:18,158 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87725706] [2020-12-23 00:41:18,159 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-23 00:41:18,159 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:41:18,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-23 00:41:18,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-12-23 00:41:18,160 INFO L87 Difference]: Start difference. First operand 106 states and 123 transitions. Second operand 12 states. [2020-12-23 00:41:18,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:41:18,366 INFO L93 Difference]: Finished difference Result 373 states and 443 transitions. [2020-12-23 00:41:18,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-23 00:41:18,367 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 66 [2020-12-23 00:41:18,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:41:18,369 INFO L225 Difference]: With dead ends: 373 [2020-12-23 00:41:18,369 INFO L226 Difference]: Without dead ends: 328 [2020-12-23 00:41:18,370 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-12-23 00:41:18,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2020-12-23 00:41:18,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 116. [2020-12-23 00:41:18,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2020-12-23 00:41:18,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 134 transitions. [2020-12-23 00:41:18,380 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 134 transitions. Word has length 66 [2020-12-23 00:41:18,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:41:18,381 INFO L481 AbstractCegarLoop]: Abstraction has 116 states and 134 transitions. [2020-12-23 00:41:18,381 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-23 00:41:18,381 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 134 transitions. [2020-12-23 00:41:18,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-12-23 00:41:18,382 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:41:18,382 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:41:18,595 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-23 00:41:18,596 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:41:18,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:41:18,597 INFO L82 PathProgramCache]: Analyzing trace with hash -495794747, now seen corresponding path program 9 times [2020-12-23 00:41:18,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:41:18,597 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499880604] [2020-12-23 00:41:18,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:41:18,605 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:41:18,605 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1900263812] [2020-12-23 00:41:18,606 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 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:41:18,802 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-12-23 00:41:18,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:41:18,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-23 00:41:18,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:41:18,967 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 189 trivial. 0 not checked. [2020-12-23 00:41:18,968 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499880604] [2020-12-23 00:41:18,968 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:41:18,968 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1900263812] [2020-12-23 00:41:18,968 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:41:18,968 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-12-23 00:41:18,968 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236475714] [2020-12-23 00:41:18,969 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-23 00:41:18,969 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:41:18,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-23 00:41:18,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-12-23 00:41:18,970 INFO L87 Difference]: Start difference. First operand 116 states and 134 transitions. Second operand 9 states. [2020-12-23 00:41:19,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:41:19,275 INFO L93 Difference]: Finished difference Result 128 states and 148 transitions. [2020-12-23 00:41:19,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-23 00:41:19,275 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 71 [2020-12-23 00:41:19,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:41:19,277 INFO L225 Difference]: With dead ends: 128 [2020-12-23 00:41:19,277 INFO L226 Difference]: Without dead ends: 126 [2020-12-23 00:41:19,277 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-12-23 00:41:19,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-12-23 00:41:19,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 121. [2020-12-23 00:41:19,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-12-23 00:41:19,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 140 transitions. [2020-12-23 00:41:19,286 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 140 transitions. Word has length 71 [2020-12-23 00:41:19,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:41:19,286 INFO L481 AbstractCegarLoop]: Abstraction has 121 states and 140 transitions. [2020-12-23 00:41:19,286 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-23 00:41:19,286 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 140 transitions. [2020-12-23 00:41:19,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-12-23 00:41:19,287 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:41:19,287 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:41:19,491 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:41:19,492 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:41:19,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:41:19,493 INFO L82 PathProgramCache]: Analyzing trace with hash 1692067691, now seen corresponding path program 10 times [2020-12-23 00:41:19,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:41:19,493 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996262754] [2020-12-23 00:41:19,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:41:19,511 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:41:19,511 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1795252583] [2020-12-23 00:41:19,512 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 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:41:19,584 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 00:41:19,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:41:19,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-23 00:41:19,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:41:19,618 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2020-12-23 00:41:19,619 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:41:19,624 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:41:19,625 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:41:19,625 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:17 [2020-12-23 00:41:19,644 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 9 [2020-12-23 00:41:19,645 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:41:19,650 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:41:19,651 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:41:19,651 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:28, output treesize:3 [2020-12-23 00:41:19,689 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 100 proven. 2 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2020-12-23 00:41:19,690 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996262754] [2020-12-23 00:41:19,690 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:41:19,690 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1795252583] [2020-12-23 00:41:19,690 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:41:19,690 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-12-23 00:41:19,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670012164] [2020-12-23 00:41:19,691 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-23 00:41:19,691 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:41:19,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-23 00:41:19,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-23 00:41:19,692 INFO L87 Difference]: Start difference. First operand 121 states and 140 transitions. Second operand 7 states. [2020-12-23 00:41:19,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:41:19,792 INFO L93 Difference]: Finished difference Result 176 states and 204 transitions. [2020-12-23 00:41:19,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-23 00:41:19,793 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 76 [2020-12-23 00:41:19,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:41:19,795 INFO L225 Difference]: With dead ends: 176 [2020-12-23 00:41:19,795 INFO L226 Difference]: Without dead ends: 108 [2020-12-23 00:41:19,795 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2020-12-23 00:41:19,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-12-23 00:41:19,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 86. [2020-12-23 00:41:19,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-12-23 00:41:19,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 95 transitions. [2020-12-23 00:41:19,801 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 95 transitions. Word has length 76 [2020-12-23 00:41:19,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:41:19,802 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 95 transitions. [2020-12-23 00:41:19,802 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-23 00:41:19,802 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 95 transitions. [2020-12-23 00:41:19,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-12-23 00:41:19,802 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:41:19,803 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:41:20,015 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:41:20,016 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:41:20,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:41:20,017 INFO L82 PathProgramCache]: Analyzing trace with hash -2042199827, now seen corresponding path program 1 times [2020-12-23 00:41:20,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:41:20,017 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549516241] [2020-12-23 00:41:20,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:41:20,025 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:41:20,025 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1890308195] [2020-12-23 00:41:20,026 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 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:41:20,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:41:20,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-23 00:41:20,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:41:20,309 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 0 proven. 189 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2020-12-23 00:41:20,309 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549516241] [2020-12-23 00:41:20,309 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:41:20,309 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1890308195] [2020-12-23 00:41:20,309 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:41:20,310 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-12-23 00:41:20,310 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16626191] [2020-12-23 00:41:20,310 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-23 00:41:20,310 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:41:20,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-23 00:41:20,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-12-23 00:41:20,311 INFO L87 Difference]: Start difference. First operand 86 states and 95 transitions. Second operand 13 states. [2020-12-23 00:41:20,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:41:20,530 INFO L93 Difference]: Finished difference Result 386 states and 451 transitions. [2020-12-23 00:41:20,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-23 00:41:20,531 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 76 [2020-12-23 00:41:20,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:41:20,533 INFO L225 Difference]: With dead ends: 386 [2020-12-23 00:41:20,533 INFO L226 Difference]: Without dead ends: 346 [2020-12-23 00:41:20,533 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-12-23 00:41:20,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2020-12-23 00:41:20,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 91. [2020-12-23 00:41:20,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-12-23 00:41:20,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 100 transitions. [2020-12-23 00:41:20,541 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 100 transitions. Word has length 76 [2020-12-23 00:41:20,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:41:20,541 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 100 transitions. [2020-12-23 00:41:20,541 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-23 00:41:20,541 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 100 transitions. [2020-12-23 00:41:20,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-12-23 00:41:20,542 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:41:20,542 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:41:20,755 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-12-23 00:41:20,756 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:41:20,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:41:20,757 INFO L82 PathProgramCache]: Analyzing trace with hash 279020216, now seen corresponding path program 2 times [2020-12-23 00:41:20,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:41:20,757 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324206593] [2020-12-23 00:41:20,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:41:20,765 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:41:20,765 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [471957866] [2020-12-23 00:41:20,765 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 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:41:20,920 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 00:41:20,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:41:20,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 00:41:20,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:41:21,147 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 0 proven. 235 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2020-12-23 00:41:21,148 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324206593] [2020-12-23 00:41:21,148 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:41:21,148 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [471957866] [2020-12-23 00:41:21,148 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:41:21,148 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-12-23 00:41:21,148 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218465771] [2020-12-23 00:41:21,149 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-23 00:41:21,149 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:41:21,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-23 00:41:21,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-12-23 00:41:21,150 INFO L87 Difference]: Start difference. First operand 91 states and 100 transitions. Second operand 14 states. [2020-12-23 00:41:21,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:41:21,406 INFO L93 Difference]: Finished difference Result 423 states and 494 transitions. [2020-12-23 00:41:21,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-23 00:41:21,409 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 81 [2020-12-23 00:41:21,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:41:21,412 INFO L225 Difference]: With dead ends: 423 [2020-12-23 00:41:21,412 INFO L226 Difference]: Without dead ends: 383 [2020-12-23 00:41:21,412 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-12-23 00:41:21,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2020-12-23 00:41:21,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 96. [2020-12-23 00:41:21,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-12-23 00:41:21,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 105 transitions. [2020-12-23 00:41:21,421 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 105 transitions. Word has length 81 [2020-12-23 00:41:21,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:41:21,422 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 105 transitions. [2020-12-23 00:41:21,422 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-23 00:41:21,422 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 105 transitions. [2020-12-23 00:41:21,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-12-23 00:41:21,422 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:41:21,423 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:41:21,638 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:41:21,639 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:41:21,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:41:21,640 INFO L82 PathProgramCache]: Analyzing trace with hash -697899059, now seen corresponding path program 3 times [2020-12-23 00:41:21,640 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:41:21,640 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282253454] [2020-12-23 00:41:21,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:41:21,648 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:41:21,648 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1191407249] [2020-12-23 00:41:21,649 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 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:41:21,756 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-23 00:41:21,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:41:21,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-23 00:41:21,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:41:38,188 WARN L197 SmtUtils]: Spent 16.40 s on a formula simplification that was a NOOP. DAG size: 32 [2020-12-23 00:41:40,232 WARN L197 SmtUtils]: Spent 2.02 s on a formula simplification that was a NOOP. DAG size: 18 [2020-12-23 00:41:40,504 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 00:41:40,510 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 00:41:40,515 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 00:41:40,519 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-23 00:41:42,580 WARN L197 SmtUtils]: Spent 2.02 s on a formula simplification that was a NOOP. DAG size: 17 [2020-12-23 00:41:44,663 WARN L197 SmtUtils]: Spent 2.02 s on a formula simplification that was a NOOP. DAG size: 19 [2020-12-23 00:41:44,759 INFO L134 CoverageAnalysis]: Checked inductivity of 332 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 291 trivial. 0 not checked. [2020-12-23 00:41:44,759 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282253454] [2020-12-23 00:41:44,759 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:41:44,760 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1191407249] [2020-12-23 00:41:44,760 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:41:44,760 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-12-23 00:41:44,760 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100912451] [2020-12-23 00:41:44,760 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-23 00:41:44,761 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:41:44,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-23 00:41:44,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2020-12-23 00:41:44,761 INFO L87 Difference]: Start difference. First operand 96 states and 105 transitions. Second operand 7 states. [2020-12-23 00:41:53,174 WARN L197 SmtUtils]: Spent 8.34 s on a formula simplification. DAG size of input: 33 DAG size of output: 31 [2020-12-23 00:42:01,749 WARN L197 SmtUtils]: Spent 8.53 s on a formula simplification. DAG size of input: 39 DAG size of output: 35 [2020-12-23 00:42:12,164 WARN L197 SmtUtils]: Spent 10.32 s on a formula simplification. DAG size of input: 40 DAG size of output: 36 [2020-12-23 00:42:18,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:42:18,479 INFO L93 Difference]: Finished difference Result 197 states and 227 transitions. [2020-12-23 00:42:18,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-23 00:42:18,531 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 86 [2020-12-23 00:42:18,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:42:18,534 INFO L225 Difference]: With dead ends: 197 [2020-12-23 00:42:18,534 INFO L226 Difference]: Without dead ends: 164 [2020-12-23 00:42:18,534 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 49.8s TimeCoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2020-12-23 00:42:18,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2020-12-23 00:42:18,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 105. [2020-12-23 00:42:18,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-12-23 00:42:18,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 117 transitions. [2020-12-23 00:42:18,549 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 117 transitions. Word has length 86 [2020-12-23 00:42:18,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:42:18,550 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 117 transitions. [2020-12-23 00:42:18,550 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-23 00:42:18,550 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 117 transitions. [2020-12-23 00:42:18,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-12-23 00:42:18,553 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:42:18,553 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 11, 11, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:42:18,754 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-12-23 00:42:18,754 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:42:18,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:42:18,755 INFO L82 PathProgramCache]: Analyzing trace with hash -459469228, now seen corresponding path program 1 times [2020-12-23 00:42:18,755 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:42:18,755 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094409498] [2020-12-23 00:42:18,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:42:18,764 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:42:18,764 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2076422232] [2020-12-23 00:42:18,764 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 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:42:18,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:42:18,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-23 00:42:18,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:42:19,307 INFO L134 CoverageAnalysis]: Checked inductivity of 388 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2020-12-23 00:42:19,307 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094409498] [2020-12-23 00:42:19,307 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:42:19,307 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2076422232] [2020-12-23 00:42:19,307 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:42:19,308 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-12-23 00:42:19,308 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091937292] [2020-12-23 00:42:19,308 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-23 00:42:19,308 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:42:19,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-23 00:42:19,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-12-23 00:42:19,309 INFO L87 Difference]: Start difference. First operand 105 states and 117 transitions. Second operand 16 states. [2020-12-23 00:42:19,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:42:19,823 INFO L93 Difference]: Finished difference Result 515 states and 604 transitions. [2020-12-23 00:42:19,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-23 00:42:19,824 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 91 [2020-12-23 00:42:19,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:42:19,827 INFO L225 Difference]: With dead ends: 515 [2020-12-23 00:42:19,827 INFO L226 Difference]: Without dead ends: 466 [2020-12-23 00:42:19,828 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-12-23 00:42:19,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 466 states. [2020-12-23 00:42:19,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 466 to 115. [2020-12-23 00:42:19,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-12-23 00:42:19,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 127 transitions. [2020-12-23 00:42:19,841 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 127 transitions. Word has length 91 [2020-12-23 00:42:19,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:42:19,842 INFO L481 AbstractCegarLoop]: Abstraction has 115 states and 127 transitions. [2020-12-23 00:42:19,842 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-23 00:42:19,842 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 127 transitions. [2020-12-23 00:42:19,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-12-23 00:42:19,843 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:42:19,843 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 13, 13, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:42:20,056 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:42:20,057 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:42:20,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:42:20,058 INFO L82 PathProgramCache]: Analyzing trace with hash -830076044, now seen corresponding path program 2 times [2020-12-23 00:42:20,058 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:42:20,059 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336604106] [2020-12-23 00:42:20,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:42:20,066 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:42:20,066 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1932054593] [2020-12-23 00:42:20,067 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 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:42:20,255 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 00:42:20,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:42:20,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-23 00:42:20,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:42:20,869 INFO L134 CoverageAnalysis]: Checked inductivity of 515 backedges. 0 proven. 469 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2020-12-23 00:42:20,869 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336604106] [2020-12-23 00:42:20,869 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:42:20,869 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1932054593] [2020-12-23 00:42:20,869 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:42:20,870 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-12-23 00:42:20,870 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741272992] [2020-12-23 00:42:20,870 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-23 00:42:20,870 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:42:20,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-23 00:42:20,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-12-23 00:42:20,871 INFO L87 Difference]: Start difference. First operand 115 states and 127 transitions. Second operand 18 states. [2020-12-23 00:42:21,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:42:21,405 INFO L93 Difference]: Finished difference Result 589 states and 690 transitions. [2020-12-23 00:42:21,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-23 00:42:21,406 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 101 [2020-12-23 00:42:21,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:42:21,409 INFO L225 Difference]: With dead ends: 589 [2020-12-23 00:42:21,409 INFO L226 Difference]: Without dead ends: 540 [2020-12-23 00:42:21,410 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-12-23 00:42:21,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 540 states. [2020-12-23 00:42:21,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 540 to 125. [2020-12-23 00:42:21,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-12-23 00:42:21,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 137 transitions. [2020-12-23 00:42:21,424 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 137 transitions. Word has length 101 [2020-12-23 00:42:21,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:42:21,425 INFO L481 AbstractCegarLoop]: Abstraction has 125 states and 137 transitions. [2020-12-23 00:42:21,425 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-23 00:42:21,425 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 137 transitions. [2020-12-23 00:42:21,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-12-23 00:42:21,426 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:42:21,426 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 15, 15, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:42:21,630 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-12-23 00:42:21,631 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:42:21,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:42:21,632 INFO L82 PathProgramCache]: Analyzing trace with hash 397222036, now seen corresponding path program 3 times [2020-12-23 00:42:21,632 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:42:21,632 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444140005] [2020-12-23 00:42:21,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:42:21,640 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:42:21,640 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1153601096] [2020-12-23 00:42:21,640 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 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:42:21,804 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-12-23 00:42:21,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:42:21,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-23 00:42:21,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:42:21,905 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 00:42:22,030 INFO L134 CoverageAnalysis]: Checked inductivity of 662 backedges. 129 proven. 4 refuted. 0 times theorem prover too weak. 529 trivial. 0 not checked. [2020-12-23 00:42:22,030 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444140005] [2020-12-23 00:42:22,030 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:42:22,030 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1153601096] [2020-12-23 00:42:22,030 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:42:22,030 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-12-23 00:42:22,031 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477055830] [2020-12-23 00:42:22,031 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-23 00:42:22,031 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:42:22,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-23 00:42:22,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-12-23 00:42:22,032 INFO L87 Difference]: Start difference. First operand 125 states and 137 transitions. Second operand 7 states. [2020-12-23 00:42:22,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:42:22,325 INFO L93 Difference]: Finished difference Result 206 states and 238 transitions. [2020-12-23 00:42:22,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-23 00:42:22,326 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 111 [2020-12-23 00:42:22,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:42:22,328 INFO L225 Difference]: With dead ends: 206 [2020-12-23 00:42:22,328 INFO L226 Difference]: Without dead ends: 173 [2020-12-23 00:42:22,328 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=50, Unknown=0, NotChecked=0, Total=90 [2020-12-23 00:42:22,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2020-12-23 00:42:22,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 137. [2020-12-23 00:42:22,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-12-23 00:42:22,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 154 transitions. [2020-12-23 00:42:22,341 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 154 transitions. Word has length 111 [2020-12-23 00:42:22,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:42:22,341 INFO L481 AbstractCegarLoop]: Abstraction has 137 states and 154 transitions. [2020-12-23 00:42:22,342 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-23 00:42:22,342 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 154 transitions. [2020-12-23 00:42:22,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-12-23 00:42:22,343 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:42:22,343 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 15, 15, 5, 5, 5, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:42:22,556 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-12-23 00:42:22,556 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:42:22,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:42:22,557 INFO L82 PathProgramCache]: Analyzing trace with hash 1645099501, now seen corresponding path program 4 times [2020-12-23 00:42:22,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:42:22,558 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715827778] [2020-12-23 00:42:22,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:42:22,565 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:42:22,565 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1483573305] [2020-12-23 00:42:22,565 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 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:42:22,819 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 00:42:22,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:42:22,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-23 00:42:22,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:42:23,598 INFO L134 CoverageAnalysis]: Checked inductivity of 743 backedges. 0 proven. 697 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2020-12-23 00:42:23,599 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715827778] [2020-12-23 00:42:23,599 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:42:23,599 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1483573305] [2020-12-23 00:42:23,599 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:42:23,599 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-12-23 00:42:23,599 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196417456] [2020-12-23 00:42:23,600 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-23 00:42:23,600 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:42:23,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-23 00:42:23,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2020-12-23 00:42:23,601 INFO L87 Difference]: Start difference. First operand 137 states and 154 transitions. Second operand 21 states. [2020-12-23 00:42:24,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:42:24,226 INFO L93 Difference]: Finished difference Result 724 states and 854 transitions. [2020-12-23 00:42:24,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-23 00:42:24,227 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 116 [2020-12-23 00:42:24,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:42:24,235 INFO L225 Difference]: With dead ends: 724 [2020-12-23 00:42:24,236 INFO L226 Difference]: Without dead ends: 663 [2020-12-23 00:42:24,237 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2020-12-23 00:42:24,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 663 states. [2020-12-23 00:42:24,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 663 to 152. [2020-12-23 00:42:24,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2020-12-23 00:42:24,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 169 transitions. [2020-12-23 00:42:24,266 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 169 transitions. Word has length 116 [2020-12-23 00:42:24,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:42:24,266 INFO L481 AbstractCegarLoop]: Abstraction has 152 states and 169 transitions. [2020-12-23 00:42:24,266 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-23 00:42:24,266 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 169 transitions. [2020-12-23 00:42:24,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-12-23 00:42:24,267 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:42:24,268 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 18, 18, 5, 5, 5, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:42:24,481 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-12-23 00:42:24,482 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:42:24,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:42:24,483 INFO L82 PathProgramCache]: Analyzing trace with hash -1484809768, now seen corresponding path program 5 times [2020-12-23 00:42:24,483 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:42:24,483 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938714041] [2020-12-23 00:42:24,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:42:24,490 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:42:24,491 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1657454463] [2020-12-23 00:42:24,491 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 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:42:25,982 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 21 check-sat command(s) [2020-12-23 00:42:25,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:42:25,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 23 conjunts are in the unsatisfiable core [2020-12-23 00:42:25,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:42:26,939 INFO L134 CoverageAnalysis]: Checked inductivity of 1016 backedges. 0 proven. 970 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2020-12-23 00:42:26,940 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938714041] [2020-12-23 00:42:26,940 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:42:26,940 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1657454463] [2020-12-23 00:42:26,940 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:42:26,940 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-12-23 00:42:26,940 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737788867] [2020-12-23 00:42:26,941 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-12-23 00:42:26,941 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:42:26,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-12-23 00:42:26,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2020-12-23 00:42:26,942 INFO L87 Difference]: Start difference. First operand 152 states and 169 transitions. Second operand 24 states. [2020-12-23 00:42:27,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:42:27,666 INFO L93 Difference]: Finished difference Result 835 states and 983 transitions. [2020-12-23 00:42:27,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-23 00:42:27,668 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 131 [2020-12-23 00:42:27,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:42:27,672 INFO L225 Difference]: With dead ends: 835 [2020-12-23 00:42:27,672 INFO L226 Difference]: Without dead ends: 774 [2020-12-23 00:42:27,673 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2020-12-23 00:42:27,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 774 states. [2020-12-23 00:42:27,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 774 to 167. [2020-12-23 00:42:27,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-12-23 00:42:27,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 184 transitions. [2020-12-23 00:42:27,692 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 184 transitions. Word has length 131 [2020-12-23 00:42:27,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:42:27,693 INFO L481 AbstractCegarLoop]: Abstraction has 167 states and 184 transitions. [2020-12-23 00:42:27,693 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-12-23 00:42:27,693 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 184 transitions. [2020-12-23 00:42:27,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-12-23 00:42:27,694 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:42:27,694 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 21, 21, 5, 5, 5, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:42:27,901 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-12-23 00:42:27,902 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:42:27,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:42:27,902 INFO L82 PathProgramCache]: Analyzing trace with hash -466942323, now seen corresponding path program 6 times [2020-12-23 00:42:27,903 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:42:27,903 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38207250] [2020-12-23 00:42:27,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:42:27,910 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:42:27,911 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [94110619] [2020-12-23 00:42:27,911 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 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:42:28,282 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-12-23 00:42:28,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:42:28,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-23 00:42:28,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:42:28,452 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-23 00:42:28,453 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:42:28,476 INFO L625 ElimStorePlain]: treesize reduction 9, result has 73.5 percent of original size [2020-12-23 00:42:28,481 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2020-12-23 00:42:28,482 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-23 00:42:28,493 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:42:28,493 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:42:28,494 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:71, output treesize:21 [2020-12-23 00:42:28,522 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2020-12-23 00:42:28,524 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:42:28,536 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:42:28,536 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:42:28,537 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:32, output treesize:13 [2020-12-23 00:42:28,964 INFO L134 CoverageAnalysis]: Checked inductivity of 1334 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 1138 trivial. 0 not checked. [2020-12-23 00:42:28,965 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38207250] [2020-12-23 00:42:28,965 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:42:28,965 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [94110619] [2020-12-23 00:42:28,965 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:42:28,965 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-12-23 00:42:28,965 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568001705] [2020-12-23 00:42:28,965 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-23 00:42:28,965 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:42:28,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-23 00:42:28,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-12-23 00:42:28,966 INFO L87 Difference]: Start difference. First operand 167 states and 184 transitions. Second operand 10 states. [2020-12-23 00:42:36,920 WARN L197 SmtUtils]: Spent 3.55 s on a formula simplification that was a NOOP. DAG size: 21 [2020-12-23 00:42:49,966 WARN L197 SmtUtils]: Spent 4.96 s on a formula simplification that was a NOOP. DAG size: 29 [2020-12-23 00:42:53,717 WARN L197 SmtUtils]: Spent 2.24 s on a formula simplification that was a NOOP. DAG size: 30 [2020-12-23 00:43:18,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:43:18,032 INFO L93 Difference]: Finished difference Result 237 states and 269 transitions. [2020-12-23 00:43:18,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-23 00:43:18,034 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 146 [2020-12-23 00:43:18,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:43:18,035 INFO L225 Difference]: With dead ends: 237 [2020-12-23 00:43:18,035 INFO L226 Difference]: Without dead ends: 204 [2020-12-23 00:43:18,036 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 138 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 18.8s TimeCoverageRelationStatistics Valid=118, Invalid=260, Unknown=2, NotChecked=0, Total=380 [2020-12-23 00:43:18,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2020-12-23 00:43:18,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 176. [2020-12-23 00:43:18,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176 states. [2020-12-23 00:43:18,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 195 transitions. [2020-12-23 00:43:18,056 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 195 transitions. Word has length 146 [2020-12-23 00:43:18,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:43:18,056 INFO L481 AbstractCegarLoop]: Abstraction has 176 states and 195 transitions. [2020-12-23 00:43:18,056 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-23 00:43:18,056 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 195 transitions. [2020-12-23 00:43:18,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-12-23 00:43:18,058 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:43:18,058 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 22, 21, 5, 5, 5, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:43:18,261 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-12-23 00:43:18,262 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:43:18,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:43:18,263 INFO L82 PathProgramCache]: Analyzing trace with hash 1584041675, now seen corresponding path program 7 times [2020-12-23 00:43:18,263 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:43:18,263 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99828881] [2020-12-23 00:43:18,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:43:18,270 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:43:18,270 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [469716388] [2020-12-23 00:43:18,270 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:43:18,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:43:18,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 26 conjunts are in the unsatisfiable core [2020-12-23 00:43:18,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:43:19,697 INFO L134 CoverageAnalysis]: Checked inductivity of 1334 backedges. 0 proven. 1288 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2020-12-23 00:43:19,697 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99828881] [2020-12-23 00:43:19,697 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:43:19,697 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [469716388] [2020-12-23 00:43:19,697 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:43:19,697 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-12-23 00:43:19,697 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440691067] [2020-12-23 00:43:19,698 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-12-23 00:43:19,698 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:43:19,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-12-23 00:43:19,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2020-12-23 00:43:19,699 INFO L87 Difference]: Start difference. First operand 176 states and 195 transitions. Second operand 27 states. [2020-12-23 00:43:20,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:43:20,852 INFO L93 Difference]: Finished difference Result 964 states and 1134 transitions. [2020-12-23 00:43:20,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-12-23 00:43:20,854 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 146 [2020-12-23 00:43:20,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:43:20,858 INFO L225 Difference]: With dead ends: 964 [2020-12-23 00:43:20,859 INFO L226 Difference]: Without dead ends: 894 [2020-12-23 00:43:20,860 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2020-12-23 00:43:20,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 894 states. [2020-12-23 00:43:20,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 894 to 191. [2020-12-23 00:43:20,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191 states. [2020-12-23 00:43:20,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 210 transitions. [2020-12-23 00:43:20,883 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 210 transitions. Word has length 146 [2020-12-23 00:43:20,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:43:20,883 INFO L481 AbstractCegarLoop]: Abstraction has 191 states and 210 transitions. [2020-12-23 00:43:20,884 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-12-23 00:43:20,884 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 210 transitions. [2020-12-23 00:43:20,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2020-12-23 00:43:20,885 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:43:20,885 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 26, 25, 24, 5, 5, 5, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:43:21,099 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:43:21,100 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:43:21,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:43:21,101 INFO L82 PathProgramCache]: Analyzing trace with hash -602177162, now seen corresponding path program 8 times [2020-12-23 00:43:21,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:43:21,101 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934385655] [2020-12-23 00:43:21,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:43:21,109 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:43:21,110 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1305374894] [2020-12-23 00:43:21,110 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 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:43:21,278 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 00:43:21,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:43:21,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 29 conjunts are in the unsatisfiable core [2020-12-23 00:43:21,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:43:22,851 INFO L134 CoverageAnalysis]: Checked inductivity of 1697 backedges. 0 proven. 1651 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2020-12-23 00:43:22,852 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934385655] [2020-12-23 00:43:22,852 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:43:22,852 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1305374894] [2020-12-23 00:43:22,852 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:43:22,852 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-12-23 00:43:22,852 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915677479] [2020-12-23 00:43:22,853 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-12-23 00:43:22,853 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:43:22,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-12-23 00:43:22,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2020-12-23 00:43:22,854 INFO L87 Difference]: Start difference. First operand 191 states and 210 transitions. Second operand 30 states. [2020-12-23 00:43:24,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:43:24,035 INFO L93 Difference]: Finished difference Result 1075 states and 1263 transitions. [2020-12-23 00:43:24,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-12-23 00:43:24,037 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 161 [2020-12-23 00:43:24,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:43:24,044 INFO L225 Difference]: With dead ends: 1075 [2020-12-23 00:43:24,044 INFO L226 Difference]: Without dead ends: 1005 [2020-12-23 00:43:24,045 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2020-12-23 00:43:24,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1005 states. [2020-12-23 00:43:24,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1005 to 206. [2020-12-23 00:43:24,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 206 states. [2020-12-23 00:43:24,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 225 transitions. [2020-12-23 00:43:24,071 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 225 transitions. Word has length 161 [2020-12-23 00:43:24,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:43:24,072 INFO L481 AbstractCegarLoop]: Abstraction has 206 states and 225 transitions. [2020-12-23 00:43:24,072 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-12-23 00:43:24,072 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 225 transitions. [2020-12-23 00:43:24,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2020-12-23 00:43:24,074 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:43:24,074 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 29, 28, 27, 5, 5, 5, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:43:24,287 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:43:24,288 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:43:24,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:43:24,288 INFO L82 PathProgramCache]: Analyzing trace with hash -661159061, now seen corresponding path program 9 times [2020-12-23 00:43:24,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:43:24,289 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442381094] [2020-12-23 00:43:24,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:43:24,299 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:43:24,299 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1674241186] [2020-12-23 00:43:24,299 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 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:43:24,542 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-12-23 00:43:24,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:43:24,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-23 00:43:24,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:43:24,720 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 00:43:24,766 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 00:43:24,913 INFO L134 CoverageAnalysis]: Checked inductivity of 2105 backedges. 369 proven. 13 refuted. 0 times theorem prover too weak. 1723 trivial. 0 not checked. [2020-12-23 00:43:24,913 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442381094] [2020-12-23 00:43:24,914 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:43:24,914 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1674241186] [2020-12-23 00:43:24,914 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:43:24,916 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-12-23 00:43:24,916 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357626998] [2020-12-23 00:43:24,917 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-23 00:43:24,918 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:43:24,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-23 00:43:24,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-12-23 00:43:24,920 INFO L87 Difference]: Start difference. First operand 206 states and 225 transitions. Second operand 8 states. [2020-12-23 00:43:25,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:43:25,437 INFO L93 Difference]: Finished difference Result 327 states and 374 transitions. [2020-12-23 00:43:25,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-23 00:43:25,439 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 176 [2020-12-23 00:43:25,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:43:25,441 INFO L225 Difference]: With dead ends: 327 [2020-12-23 00:43:25,441 INFO L226 Difference]: Without dead ends: 294 [2020-12-23 00:43:25,442 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 169 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=90, Unknown=0, NotChecked=0, Total=156 [2020-12-23 00:43:25,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2020-12-23 00:43:25,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 216. [2020-12-23 00:43:25,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 216 states. [2020-12-23 00:43:25,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 239 transitions. [2020-12-23 00:43:25,461 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 239 transitions. Word has length 176 [2020-12-23 00:43:25,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:43:25,462 INFO L481 AbstractCegarLoop]: Abstraction has 216 states and 239 transitions. [2020-12-23 00:43:25,462 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-23 00:43:25,462 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 239 transitions. [2020-12-23 00:43:25,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2020-12-23 00:43:25,464 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:43:25,464 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 30, 28, 27, 5, 5, 5, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:43:25,668 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2020-12-23 00:43:25,669 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:43:25,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:43:25,670 INFO L82 PathProgramCache]: Analyzing trace with hash 896573234, now seen corresponding path program 10 times [2020-12-23 00:43:25,670 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:43:25,670 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267587165] [2020-12-23 00:43:25,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:43:25,677 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:43:25,677 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [655033228] [2020-12-23 00:43:25,677 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 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:43:26,555 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 00:43:26,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:43:26,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 383 conjuncts, 33 conjunts are in the unsatisfiable core [2020-12-23 00:43:26,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:43:28,489 INFO L134 CoverageAnalysis]: Checked inductivity of 2251 backedges. 0 proven. 2205 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2020-12-23 00:43:28,490 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267587165] [2020-12-23 00:43:28,490 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:43:28,490 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [655033228] [2020-12-23 00:43:28,490 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:43:28,490 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-12-23 00:43:28,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919056983] [2020-12-23 00:43:28,491 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-12-23 00:43:28,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:43:28,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-12-23 00:43:28,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2020-12-23 00:43:28,492 INFO L87 Difference]: Start difference. First operand 216 states and 239 transitions. Second operand 34 states. [2020-12-23 00:43:29,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:43:29,754 INFO L93 Difference]: Finished difference Result 1243 states and 1464 transitions. [2020-12-23 00:43:29,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-12-23 00:43:29,756 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 181 [2020-12-23 00:43:29,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:43:29,760 INFO L225 Difference]: With dead ends: 1243 [2020-12-23 00:43:29,760 INFO L226 Difference]: Without dead ends: 1163 [2020-12-23 00:43:29,761 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2020-12-23 00:43:29,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1163 states. [2020-12-23 00:43:29,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1163 to 236. [2020-12-23 00:43:29,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 236 states. [2020-12-23 00:43:29,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 259 transitions. [2020-12-23 00:43:29,790 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 259 transitions. Word has length 181 [2020-12-23 00:43:29,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:43:29,790 INFO L481 AbstractCegarLoop]: Abstraction has 236 states and 259 transitions. [2020-12-23 00:43:29,790 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-12-23 00:43:29,791 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 259 transitions. [2020-12-23 00:43:29,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2020-12-23 00:43:29,793 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:43:29,793 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 34, 32, 31, 5, 5, 5, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:43:30,007 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:43:30,008 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:43:30,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:43:30,009 INFO L82 PathProgramCache]: Analyzing trace with hash -1128242830, now seen corresponding path program 11 times [2020-12-23 00:43:30,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:43:30,010 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175900296] [2020-12-23 00:43:30,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:43:30,017 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:43:30,017 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1253168971] [2020-12-23 00:43:30,017 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 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:43:53,567 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 35 check-sat command(s) [2020-12-23 00:43:53,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:43:53,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 37 conjunts are in the unsatisfiable core [2020-12-23 00:43:53,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:43:56,094 INFO L134 CoverageAnalysis]: Checked inductivity of 2885 backedges. 0 proven. 2839 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2020-12-23 00:43:56,094 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175900296] [2020-12-23 00:43:56,094 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:43:56,094 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1253168971] [2020-12-23 00:43:56,094 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:43:56,095 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-12-23 00:43:56,095 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187094631] [2020-12-23 00:43:56,096 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-12-23 00:43:56,096 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:43:56,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-12-23 00:43:56,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2020-12-23 00:43:56,099 INFO L87 Difference]: Start difference. First operand 236 states and 259 transitions. Second operand 38 states. [2020-12-23 00:43:57,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:43:57,834 INFO L93 Difference]: Finished difference Result 1391 states and 1636 transitions. [2020-12-23 00:43:57,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-12-23 00:43:57,836 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 201 [2020-12-23 00:43:57,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:43:57,842 INFO L225 Difference]: With dead ends: 1391 [2020-12-23 00:43:57,842 INFO L226 Difference]: Without dead ends: 1311 [2020-12-23 00:43:57,844 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2020-12-23 00:43:57,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1311 states. [2020-12-23 00:43:57,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1311 to 256. [2020-12-23 00:43:57,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 256 states. [2020-12-23 00:43:57,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 279 transitions. [2020-12-23 00:43:57,883 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 279 transitions. Word has length 201 [2020-12-23 00:43:57,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:43:57,883 INFO L481 AbstractCegarLoop]: Abstraction has 256 states and 279 transitions. [2020-12-23 00:43:57,883 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-12-23 00:43:57,883 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 279 transitions. [2020-12-23 00:43:57,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2020-12-23 00:43:57,884 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:43:57,885 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 38, 36, 35, 5, 5, 5, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:43:58,085 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2020-12-23 00:43:58,086 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:43:58,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:43:58,086 INFO L82 PathProgramCache]: Analyzing trace with hash -1764195406, now seen corresponding path program 12 times [2020-12-23 00:43:58,087 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:43:58,087 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935452177] [2020-12-23 00:43:58,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:43:58,095 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:43:58,096 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1727426240] [2020-12-23 00:43:58,096 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 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:43:58,546 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-12-23 00:43:58,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:43:58,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-23 00:43:58,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:43:58,818 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-23 00:43:58,819 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:43:58,846 INFO L625 ElimStorePlain]: treesize reduction 9, result has 73.5 percent of original size [2020-12-23 00:43:58,850 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2020-12-23 00:43:58,850 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-23 00:43:58,862 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:43:58,863 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:43:58,864 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:71, output treesize:21 [2020-12-23 00:43:58,893 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2020-12-23 00:43:58,894 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:43:58,905 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:43:58,905 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:43:58,906 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:32, output treesize:13 [2020-12-23 00:44:01,836 INFO L134 CoverageAnalysis]: Checked inductivity of 3599 backedges. 0 proven. 507 refuted. 1 times theorem prover too weak. 3091 trivial. 0 not checked. [2020-12-23 00:44:01,837 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935452177] [2020-12-23 00:44:01,837 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:44:01,837 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1727426240] [2020-12-23 00:44:01,837 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:44:01,837 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-12-23 00:44:01,838 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149484991] [2020-12-23 00:44:01,838 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-23 00:44:01,838 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:44:01,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-23 00:44:01,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=80, Unknown=1, NotChecked=0, Total=110 [2020-12-23 00:44:01,839 INFO L87 Difference]: Start difference. First operand 256 states and 279 transitions. Second operand 11 states. [2020-12-23 00:44:11,262 WARN L197 SmtUtils]: Spent 9.16 s on a formula simplification that was a NOOP. DAG size: 40 [2020-12-23 00:44:24,349 WARN L197 SmtUtils]: Spent 498.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2020-12-23 00:44:55,364 WARN L197 SmtUtils]: Spent 2.48 s on a formula simplification that was a NOOP. DAG size: 48 [2020-12-23 00:45:00,461 WARN L197 SmtUtils]: Spent 2.45 s on a formula simplification that was a NOOP. DAG size: 50 [2020-12-23 00:45:12,736 WARN L197 SmtUtils]: Spent 2.80 s on a formula simplification that was a NOOP. DAG size: 49 [2020-12-23 00:45:27,544 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (mod (mod (mod c_ULTIMATE.start_main_~i~0 4294967296) 3) 4294967296))) (and (= c_~N~0 1000) (= .cse0 (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#a~0.base|) (+ |c_ULTIMATE.start_main_~#a~0.offset| (* c_ULTIMATE.start_main_~i~0 4)))) (= c_ULTIMATE.start_main_~R~0 3) (= .cse0 0) (= (mod (mod (mod (+ c_ULTIMATE.start_main_~i~0 4294967294) 4294967296) 3) 4294967296) 0) (< c_ULTIMATE.start_main_~i~0 c_~N~0))) is different from false