/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-patterns/array28_pattern.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-178dd20 [2021-01-06 10:56:31,316 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-06 10:56:31,318 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-06 10:56:31,354 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-01-06 10:56:31,355 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-01-06 10:56:31,357 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-01-06 10:56:31,358 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-01-06 10:56:31,361 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-01-06 10:56:31,363 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-01-06 10:56:31,364 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-01-06 10:56:31,365 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-01-06 10:56:31,366 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-01-06 10:56:31,367 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-06 10:56:31,368 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-06 10:56:31,369 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-06 10:56:31,371 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-06 10:56:31,372 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-06 10:56:31,373 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-06 10:56:31,375 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-06 10:56:31,377 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-06 10:56:31,379 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-06 10:56:31,380 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-06 10:56:31,382 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-06 10:56:31,383 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-06 10:56:31,386 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-01-06 10:56:31,399 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-06 10:56:31,400 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-06 10:56:31,401 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-06 10:56:31,402 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-01-06 10:56:31,433 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-06 10:56:31,434 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-06 10:56:31,435 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-06 10:56:31,436 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-06 10:56:31,436 INFO L138 SettingsManager]: * Use SBE=true [2021-01-06 10:56:31,460 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-06 10:56:31,460 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-06 10:56:31,460 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-06 10:56:31,460 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-01-06 10:56:31,460 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-06 10:56:31,461 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-01-06 10:56:31,461 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-01-06 10:56:31,461 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-06 10:56:31,461 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-01-06 10:56:31,462 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-06 10:56:31,462 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-06 10:56:31,462 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-06 10:56:31,462 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 10:56:31,463 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-06 10:56:31,463 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-06 10:56:31,463 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-01-06 10:56:31,463 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-06 10:56:31,463 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-06 10:56:31,464 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-01-06 10:56:31,464 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-01-06 10:56:31,464 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-06 10:56:31,856 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-06 10:56:31,903 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-06 10:56:31,908 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-06 10:56:31,910 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-06 10:56:31,911 INFO L275 PluginConnector]: CDTParser initialized [2021-01-06 10:56:31,912 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-patterns/array28_pattern.c [2021-01-06 10:56:32,004 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/09fe96bfb/52771a2962834f7d8dbd909b6b4ec915/FLAGa30098f4f [2021-01-06 10:56:32,575 INFO L306 CDTParser]: Found 1 translation units. [2021-01-06 10:56:32,575 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-patterns/array28_pattern.c [2021-01-06 10:56:32,583 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/09fe96bfb/52771a2962834f7d8dbd909b6b4ec915/FLAGa30098f4f [2021-01-06 10:56:32,966 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/09fe96bfb/52771a2962834f7d8dbd909b6b4ec915 [2021-01-06 10:56:32,969 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-06 10:56:32,973 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-01-06 10:56:32,977 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-06 10:56:32,977 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-06 10:56:32,982 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-06 10:56:32,983 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 10:56:32" (1/1) ... [2021-01-06 10:56:32,986 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@34910fb7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:56:32, skipping insertion in model container [2021-01-06 10:56:32,986 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 10:56:32" (1/1) ... [2021-01-06 10:56:32,995 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-06 10:56:33,015 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-01-06 10:56:33,208 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-patterns/array28_pattern.c[1246,1259] left hand side expression in assignment: lhs: VariableLHS[~ARR_SIZE~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~row~0,] left hand side expression in assignment: lhs: VariableLHS[~column~0,] left hand side expression in assignment: lhs: ArrayLHS[ArrayLHS[VariableLHS[~array~0,],[IdentifierExpression[~row~0,]]],[IdentifierExpression[~column~0,]]] left hand side expression in assignment: lhs: ArrayLHS[ArrayLHS[VariableLHS[~array~0,],[IdentifierExpression[~row~0,]]],[IdentifierExpression[~column~0,]]] left hand side expression in assignment: lhs: ArrayLHS[ArrayLHS[VariableLHS[~array~0,],[IdentifierExpression[~row~0,]]],[IdentifierExpression[~column~0,]]] left hand side expression in assignment: lhs: VariableLHS[~row~0,] left hand side expression in assignment: lhs: VariableLHS[~column~0,] left hand side expression in assignment: lhs: VariableLHS[~sum~0,] [2021-01-06 10:56:33,242 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 10:56:33,255 INFO L203 MainTranslator]: Completed pre-run [2021-01-06 10:56:33,277 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-patterns/array28_pattern.c[1246,1259] left hand side expression in assignment: lhs: VariableLHS[~ARR_SIZE~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~row~0,] left hand side expression in assignment: lhs: VariableLHS[~column~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#array~0,],base],BinaryExpression[ARITHPLUS,BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#array~0,],offset],BinaryExpression[ARITHMUL,IdentifierExpression[~row~0,],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~ARR_SIZE~0,GLOBAL]]]],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~column~0,]]]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#array~0,],base],BinaryExpression[ARITHPLUS,BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#array~0,],offset],BinaryExpression[ARITHMUL,IdentifierExpression[~row~0,],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~ARR_SIZE~0,GLOBAL]]]],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~column~0,]]]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#array~0,],base],BinaryExpression[ARITHPLUS,BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#array~0,],offset],BinaryExpression[ARITHMUL,IdentifierExpression[~row~0,],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~ARR_SIZE~0,GLOBAL]]]],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~column~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~row~0,] left hand side expression in assignment: lhs: VariableLHS[~column~0,] left hand side expression in assignment: lhs: VariableLHS[~sum~0,] [2021-01-06 10:56:33,314 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 10:56:33,336 INFO L208 MainTranslator]: Completed translation [2021-01-06 10:56:33,336 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:56:33 WrapperNode [2021-01-06 10:56:33,337 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-06 10:56:33,338 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-06 10:56:33,338 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-06 10:56:33,338 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-06 10:56:33,348 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:56:33" (1/1) ... [2021-01-06 10:56:33,359 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:56:33" (1/1) ... [2021-01-06 10:56:33,391 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-06 10:56:33,394 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-06 10:56:33,395 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-06 10:56:33,395 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-06 10:56:33,405 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:56:33" (1/1) ... [2021-01-06 10:56:33,405 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:56:33" (1/1) ... [2021-01-06 10:56:33,416 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:56:33" (1/1) ... [2021-01-06 10:56:33,417 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:56:33" (1/1) ... [2021-01-06 10:56:33,422 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:56:33" (1/1) ... [2021-01-06 10:56:33,427 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:56:33" (1/1) ... [2021-01-06 10:56:33,429 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:56:33" (1/1) ... [2021-01-06 10:56:33,431 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-06 10:56:33,432 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-06 10:56:33,432 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-06 10:56:33,432 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-06 10:56:33,433 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:56:33" (1/1) ... No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 10:56:33,535 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-06 10:56:33,535 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-06 10:56:33,536 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-01-06 10:56:33,536 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-06 10:56:33,536 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-06 10:56:33,536 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-01-06 10:56:33,537 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-01-06 10:56:33,862 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-06 10:56:33,863 INFO L299 CfgBuilder]: Removed 12 assume(true) statements. [2021-01-06 10:56:33,868 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 10:56:33 BoogieIcfgContainer [2021-01-06 10:56:33,886 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-06 10:56:33,893 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-06 10:56:33,894 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-06 10:56:33,907 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-06 10:56:33,908 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.01 10:56:32" (1/3) ... [2021-01-06 10:56:33,909 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f71335c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 10:56:33, skipping insertion in model container [2021-01-06 10:56:33,909 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:56:33" (2/3) ... [2021-01-06 10:56:33,910 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f71335c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 10:56:33, skipping insertion in model container [2021-01-06 10:56:33,910 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 10:56:33" (3/3) ... [2021-01-06 10:56:33,914 INFO L111 eAbstractionObserver]: Analyzing ICFG array28_pattern.c [2021-01-06 10:56:33,929 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-06 10:56:33,936 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-01-06 10:56:33,980 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-01-06 10:56:34,026 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-06 10:56:34,027 INFO L378 AbstractCegarLoop]: Hoare is true [2021-01-06 10:56:34,027 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-06 10:56:34,027 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-06 10:56:34,027 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-06 10:56:34,031 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-06 10:56:34,031 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-01-06 10:56:34,031 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-06 10:56:34,044 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states. [2021-01-06 10:56:34,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-01-06 10:56:34,049 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:56:34,050 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:56:34,050 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:56:34,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:56:34,055 INFO L82 PathProgramCache]: Analyzing trace with hash -320975489, now seen corresponding path program 1 times [2021-01-06 10:56:34,066 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:56:34,067 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752316181] [2021-01-06 10:56:34,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:56:34,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:56:34,239 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:56:34,240 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752316181] [2021-01-06 10:56:34,240 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 10:56:34,241 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-01-06 10:56:34,242 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65459801] [2021-01-06 10:56:34,246 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-01-06 10:56:34,247 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:56:34,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-01-06 10:56:34,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-01-06 10:56:34,269 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 2 states. [2021-01-06 10:56:34,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:56:34,294 INFO L93 Difference]: Finished difference Result 43 states and 64 transitions. [2021-01-06 10:56:34,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-01-06 10:56:34,296 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2021-01-06 10:56:34,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:56:34,307 INFO L225 Difference]: With dead ends: 43 [2021-01-06 10:56:34,307 INFO L226 Difference]: Without dead ends: 19 [2021-01-06 10:56:34,311 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-01-06 10:56:34,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-01-06 10:56:34,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-01-06 10:56:34,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2021-01-06 10:56:34,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 24 transitions. [2021-01-06 10:56:34,359 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 24 transitions. Word has length 10 [2021-01-06 10:56:34,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:56:34,360 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 24 transitions. [2021-01-06 10:56:34,360 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2021-01-06 10:56:34,360 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 24 transitions. [2021-01-06 10:56:34,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-01-06 10:56:34,362 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:56:34,362 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:56:34,362 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-01-06 10:56:34,364 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:56:34,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:56:34,367 INFO L82 PathProgramCache]: Analyzing trace with hash -1931938343, now seen corresponding path program 1 times [2021-01-06 10:56:34,367 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:56:34,368 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714435499] [2021-01-06 10:56:34,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:56:34,411 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:56:34,412 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1420840515] [2021-01-06 10:56:34,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:56:34,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:56:34,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 7 conjunts are in the unsatisfiable core [2021-01-06 10:56:34,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:56:34,713 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:56:34,714 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714435499] [2021-01-06 10:56:34,714 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:56:34,715 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1420840515] [2021-01-06 10:56:34,715 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 10:56:34,716 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-01-06 10:56:34,717 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780811011] [2021-01-06 10:56:34,719 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 10:56:34,719 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:56:34,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 10:56:34,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-01-06 10:56:34,722 INFO L87 Difference]: Start difference. First operand 19 states and 24 transitions. Second operand 5 states. [2021-01-06 10:56:34,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:56:34,955 INFO L93 Difference]: Finished difference Result 38 states and 50 transitions. [2021-01-06 10:56:34,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-06 10:56:34,956 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2021-01-06 10:56:34,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:56:34,957 INFO L225 Difference]: With dead ends: 38 [2021-01-06 10:56:34,958 INFO L226 Difference]: Without dead ends: 29 [2021-01-06 10:56:34,959 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-01-06 10:56:34,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-01-06 10:56:34,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 21. [2021-01-06 10:56:34,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2021-01-06 10:56:34,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 26 transitions. [2021-01-06 10:56:34,965 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 26 transitions. Word has length 10 [2021-01-06 10:56:34,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:56:34,966 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 26 transitions. [2021-01-06 10:56:34,966 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 10:56:34,966 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 26 transitions. [2021-01-06 10:56:34,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-01-06 10:56:34,967 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:56:34,967 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:56:35,176 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-01-06 10:56:35,177 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:56:35,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:56:35,179 INFO L82 PathProgramCache]: Analyzing trace with hash -438331433, now seen corresponding path program 1 times [2021-01-06 10:56:35,180 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:56:35,180 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067842185] [2021-01-06 10:56:35,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:56:35,205 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:56:35,206 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [998873616] [2021-01-06 10:56:35,207 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 [2021-01-06 10:56:35,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:56:35,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 4 conjunts are in the unsatisfiable core [2021-01-06 10:56:35,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:56:35,341 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 10:56:35,341 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067842185] [2021-01-06 10:56:35,342 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:56:35,342 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [998873616] [2021-01-06 10:56:35,342 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 10:56:35,342 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-01-06 10:56:35,343 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131849615] [2021-01-06 10:56:35,343 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-01-06 10:56:35,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:56:35,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-01-06 10:56:35,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-01-06 10:56:35,345 INFO L87 Difference]: Start difference. First operand 21 states and 26 transitions. Second operand 4 states. [2021-01-06 10:56:35,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:56:35,450 INFO L93 Difference]: Finished difference Result 43 states and 57 transitions. [2021-01-06 10:56:35,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-01-06 10:56:35,451 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2021-01-06 10:56:35,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:56:35,452 INFO L225 Difference]: With dead ends: 43 [2021-01-06 10:56:35,453 INFO L226 Difference]: Without dead ends: 27 [2021-01-06 10:56:35,453 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-01-06 10:56:35,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-01-06 10:56:35,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 25. [2021-01-06 10:56:35,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2021-01-06 10:56:35,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 31 transitions. [2021-01-06 10:56:35,460 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 31 transitions. Word has length 16 [2021-01-06 10:56:35,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:56:35,461 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 31 transitions. [2021-01-06 10:56:35,461 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-01-06 10:56:35,461 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 31 transitions. [2021-01-06 10:56:35,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-01-06 10:56:35,462 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:56:35,462 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:56:35,675 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:56:35,676 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:56:35,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:56:35,678 INFO L82 PathProgramCache]: Analyzing trace with hash -308201553, now seen corresponding path program 1 times [2021-01-06 10:56:35,678 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:56:35,679 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342553680] [2021-01-06 10:56:35,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:56:35,693 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:56:35,693 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [127366452] [2021-01-06 10:56:35,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:56:35,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:56:35,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 3 conjunts are in the unsatisfiable core [2021-01-06 10:56:35,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:56:35,857 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-01-06 10:56:35,857 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342553680] [2021-01-06 10:56:35,857 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:56:35,858 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [127366452] [2021-01-06 10:56:35,858 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 10:56:35,858 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-01-06 10:56:35,858 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844393875] [2021-01-06 10:56:35,859 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-01-06 10:56:35,859 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:56:35,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-01-06 10:56:35,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-01-06 10:56:35,860 INFO L87 Difference]: Start difference. First operand 25 states and 31 transitions. Second operand 4 states. [2021-01-06 10:56:35,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:56:35,951 INFO L93 Difference]: Finished difference Result 57 states and 74 transitions. [2021-01-06 10:56:35,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-01-06 10:56:35,952 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2021-01-06 10:56:35,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:56:35,954 INFO L225 Difference]: With dead ends: 57 [2021-01-06 10:56:35,955 INFO L226 Difference]: Without dead ends: 37 [2021-01-06 10:56:35,955 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-01-06 10:56:35,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-01-06 10:56:35,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 32. [2021-01-06 10:56:35,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2021-01-06 10:56:35,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 40 transitions. [2021-01-06 10:56:35,963 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 40 transitions. Word has length 21 [2021-01-06 10:56:35,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:56:35,964 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 40 transitions. [2021-01-06 10:56:35,964 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-01-06 10:56:35,964 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 40 transitions. [2021-01-06 10:56:35,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-01-06 10:56:35,965 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:56:35,965 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:56:36,179 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:56:36,180 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:56:36,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:56:36,181 INFO L82 PathProgramCache]: Analyzing trace with hash 1924412114, now seen corresponding path program 1 times [2021-01-06 10:56:36,182 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:56:36,182 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150936940] [2021-01-06 10:56:36,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:56:36,198 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:56:36,198 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1265532507] [2021-01-06 10:56:36,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:56:36,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:56:36,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 25 conjunts are in the unsatisfiable core [2021-01-06 10:56:36,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:56:36,425 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 11 treesize of output 7 [2021-01-06 10:56:36,426 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:56:36,437 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:56:36,438 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:56:36,438 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:18, output treesize:14 [2021-01-06 10:56:36,562 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 [2021-01-06 10:56:36,564 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:56:36,566 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:56:36,567 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:56:36,567 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:15, output treesize:3 [2021-01-06 10:56:36,609 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:56:36,609 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150936940] [2021-01-06 10:56:36,609 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:56:36,610 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1265532507] [2021-01-06 10:56:36,610 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:56:36,610 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-01-06 10:56:36,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642839299] [2021-01-06 10:56:36,611 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-01-06 10:56:36,611 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:56:36,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-01-06 10:56:36,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-01-06 10:56:36,612 INFO L87 Difference]: Start difference. First operand 32 states and 40 transitions. Second operand 11 states. [2021-01-06 10:56:37,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:56:37,160 INFO L93 Difference]: Finished difference Result 56 states and 70 transitions. [2021-01-06 10:56:37,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 10:56:37,161 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 22 [2021-01-06 10:56:37,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:56:37,163 INFO L225 Difference]: With dead ends: 56 [2021-01-06 10:56:37,163 INFO L226 Difference]: Without dead ends: 52 [2021-01-06 10:56:37,164 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=110, Invalid=232, Unknown=0, NotChecked=0, Total=342 [2021-01-06 10:56:37,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-01-06 10:56:37,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 47. [2021-01-06 10:56:37,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2021-01-06 10:56:37,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 61 transitions. [2021-01-06 10:56:37,174 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 61 transitions. Word has length 22 [2021-01-06 10:56:37,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:56:37,174 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 61 transitions. [2021-01-06 10:56:37,175 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-01-06 10:56:37,175 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 61 transitions. [2021-01-06 10:56:37,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-01-06 10:56:37,176 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:56:37,176 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:56:37,389 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:56:37,390 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:56:37,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:56:37,391 INFO L82 PathProgramCache]: Analyzing trace with hash -1610605580, now seen corresponding path program 2 times [2021-01-06 10:56:37,392 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:56:37,393 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577700509] [2021-01-06 10:56:37,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:56:37,405 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:56:37,405 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1515968081] [2021-01-06 10:56:37,405 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 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:56:37,465 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 10:56:37,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:56:37,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 6 conjunts are in the unsatisfiable core [2021-01-06 10:56:37,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:56:37,561 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:56:37,562 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577700509] [2021-01-06 10:56:37,562 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:56:37,563 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1515968081] [2021-01-06 10:56:37,563 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:56:37,563 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-01-06 10:56:37,563 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033385290] [2021-01-06 10:56:37,564 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-06 10:56:37,564 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:56:37,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-06 10:56:37,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-01-06 10:56:37,565 INFO L87 Difference]: Start difference. First operand 47 states and 61 transitions. Second operand 7 states. [2021-01-06 10:56:37,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:56:37,734 INFO L93 Difference]: Finished difference Result 145 states and 190 transitions. [2021-01-06 10:56:37,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-01-06 10:56:37,735 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 24 [2021-01-06 10:56:37,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:56:37,736 INFO L225 Difference]: With dead ends: 145 [2021-01-06 10:56:37,736 INFO L226 Difference]: Without dead ends: 110 [2021-01-06 10:56:37,737 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-01-06 10:56:37,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-01-06 10:56:37,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 81. [2021-01-06 10:56:37,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2021-01-06 10:56:37,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 104 transitions. [2021-01-06 10:56:37,753 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 104 transitions. Word has length 24 [2021-01-06 10:56:37,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:56:37,753 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 104 transitions. [2021-01-06 10:56:37,753 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-01-06 10:56:37,753 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 104 transitions. [2021-01-06 10:56:37,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-01-06 10:56:37,754 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:56:37,755 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:56:37,967 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-01-06 10:56:37,968 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:56:37,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:56:37,969 INFO L82 PathProgramCache]: Analyzing trace with hash -1861003047, now seen corresponding path program 3 times [2021-01-06 10:56:37,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:56:37,969 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968626214] [2021-01-06 10:56:37,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:56:37,980 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:56:37,981 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1599972412] [2021-01-06 10:56:37,981 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:56:38,046 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-01-06 10:56:38,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:56:38,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 6 conjunts are in the unsatisfiable core [2021-01-06 10:56:38,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:56:38,121 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-01-06 10:56:38,121 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968626214] [2021-01-06 10:56:38,121 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:56:38,122 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1599972412] [2021-01-06 10:56:38,122 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:56:38,122 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-01-06 10:56:38,122 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094948760] [2021-01-06 10:56:38,123 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-06 10:56:38,123 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:56:38,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-06 10:56:38,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-01-06 10:56:38,124 INFO L87 Difference]: Start difference. First operand 81 states and 104 transitions. Second operand 7 states. [2021-01-06 10:56:38,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:56:38,250 INFO L93 Difference]: Finished difference Result 174 states and 219 transitions. [2021-01-06 10:56:38,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-01-06 10:56:38,251 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 27 [2021-01-06 10:56:38,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:56:38,252 INFO L225 Difference]: With dead ends: 174 [2021-01-06 10:56:38,253 INFO L226 Difference]: Without dead ends: 151 [2021-01-06 10:56:38,253 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-01-06 10:56:38,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-01-06 10:56:38,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 94. [2021-01-06 10:56:38,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2021-01-06 10:56:38,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 119 transitions. [2021-01-06 10:56:38,272 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 119 transitions. Word has length 27 [2021-01-06 10:56:38,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:56:38,272 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 119 transitions. [2021-01-06 10:56:38,272 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-01-06 10:56:38,272 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 119 transitions. [2021-01-06 10:56:38,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-01-06 10:56:38,274 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:56:38,274 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:56:38,488 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:56:38,489 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:56:38,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:56:38,491 INFO L82 PathProgramCache]: Analyzing trace with hash 1161564239, now seen corresponding path program 1 times [2021-01-06 10:56:38,492 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:56:38,492 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288110725] [2021-01-06 10:56:38,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:56:38,502 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:56:38,503 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1892435314] [2021-01-06 10:56:38,503 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 [2021-01-06 10:56:38,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:56:38,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 6 conjunts are in the unsatisfiable core [2021-01-06 10:56:38,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:56:38,658 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-01-06 10:56:38,658 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288110725] [2021-01-06 10:56:38,659 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:56:38,659 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1892435314] [2021-01-06 10:56:38,659 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:56:38,659 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-01-06 10:56:38,659 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697040753] [2021-01-06 10:56:38,660 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-06 10:56:38,660 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:56:38,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-06 10:56:38,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-01-06 10:56:38,661 INFO L87 Difference]: Start difference. First operand 94 states and 119 transitions. Second operand 7 states. [2021-01-06 10:56:38,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:56:38,822 INFO L93 Difference]: Finished difference Result 131 states and 162 transitions. [2021-01-06 10:56:38,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-01-06 10:56:38,822 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 28 [2021-01-06 10:56:38,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:56:38,823 INFO L225 Difference]: With dead ends: 131 [2021-01-06 10:56:38,823 INFO L226 Difference]: Without dead ends: 89 [2021-01-06 10:56:38,824 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-01-06 10:56:38,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-01-06 10:56:38,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 72. [2021-01-06 10:56:38,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2021-01-06 10:56:38,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 89 transitions. [2021-01-06 10:56:38,835 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 89 transitions. Word has length 28 [2021-01-06 10:56:38,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:56:38,835 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 89 transitions. [2021-01-06 10:56:38,835 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-01-06 10:56:38,835 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 89 transitions. [2021-01-06 10:56:38,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-01-06 10:56:38,836 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:56:38,836 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:56:39,051 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:56:39,052 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:56:39,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:56:39,053 INFO L82 PathProgramCache]: Analyzing trace with hash -1512912821, now seen corresponding path program 1 times [2021-01-06 10:56:39,054 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:56:39,054 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548102752] [2021-01-06 10:56:39,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:56:39,064 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:56:39,065 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [687659490] [2021-01-06 10:56:39,065 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 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 [2021-01-06 10:56:39,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:56:39,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 6 conjunts are in the unsatisfiable core [2021-01-06 10:56:39,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:56:39,190 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-01-06 10:56:39,190 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548102752] [2021-01-06 10:56:39,190 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:56:39,190 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [687659490] [2021-01-06 10:56:39,191 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:56:39,191 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-01-06 10:56:39,191 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991385580] [2021-01-06 10:56:39,191 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-06 10:56:39,192 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:56:39,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-06 10:56:39,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-01-06 10:56:39,193 INFO L87 Difference]: Start difference. First operand 72 states and 89 transitions. Second operand 7 states. [2021-01-06 10:56:39,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:56:39,299 INFO L93 Difference]: Finished difference Result 160 states and 206 transitions. [2021-01-06 10:56:39,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-01-06 10:56:39,300 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 28 [2021-01-06 10:56:39,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:56:39,301 INFO L225 Difference]: With dead ends: 160 [2021-01-06 10:56:39,301 INFO L226 Difference]: Without dead ends: 98 [2021-01-06 10:56:39,302 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-01-06 10:56:39,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-01-06 10:56:39,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 72. [2021-01-06 10:56:39,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2021-01-06 10:56:39,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 88 transitions. [2021-01-06 10:56:39,311 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 88 transitions. Word has length 28 [2021-01-06 10:56:39,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:56:39,312 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 88 transitions. [2021-01-06 10:56:39,312 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-01-06 10:56:39,312 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 88 transitions. [2021-01-06 10:56:39,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-01-06 10:56:39,313 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:56:39,313 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:56:39,527 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-01-06 10:56:39,528 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:56:39,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:56:39,529 INFO L82 PathProgramCache]: Analyzing trace with hash -1901938394, now seen corresponding path program 1 times [2021-01-06 10:56:39,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:56:39,530 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914758657] [2021-01-06 10:56:39,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:56:39,540 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:56:39,541 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [693179842] [2021-01-06 10:56:39,541 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 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 [2021-01-06 10:56:39,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:56:39,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 6 conjunts are in the unsatisfiable core [2021-01-06 10:56:39,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:56:39,677 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 9 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-01-06 10:56:39,678 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914758657] [2021-01-06 10:56:39,678 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:56:39,678 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [693179842] [2021-01-06 10:56:39,678 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:56:39,679 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-01-06 10:56:39,679 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135491611] [2021-01-06 10:56:39,679 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-06 10:56:39,679 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:56:39,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-06 10:56:39,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-01-06 10:56:39,680 INFO L87 Difference]: Start difference. First operand 72 states and 88 transitions. Second operand 7 states. [2021-01-06 10:56:39,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:56:39,810 INFO L93 Difference]: Finished difference Result 84 states and 103 transitions. [2021-01-06 10:56:39,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-01-06 10:56:39,810 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 32 [2021-01-06 10:56:39,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:56:39,811 INFO L225 Difference]: With dead ends: 84 [2021-01-06 10:56:39,811 INFO L226 Difference]: Without dead ends: 71 [2021-01-06 10:56:39,813 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-01-06 10:56:39,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-01-06 10:56:39,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 47. [2021-01-06 10:56:39,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2021-01-06 10:56:39,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 55 transitions. [2021-01-06 10:56:39,821 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 55 transitions. Word has length 32 [2021-01-06 10:56:39,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:56:39,821 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 55 transitions. [2021-01-06 10:56:39,821 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-01-06 10:56:39,821 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 55 transitions. [2021-01-06 10:56:39,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-01-06 10:56:39,825 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:56:39,826 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:56:40,039 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:56:40,040 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:56:40,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:56:40,041 INFO L82 PathProgramCache]: Analyzing trace with hash -533293431, now seen corresponding path program 2 times [2021-01-06 10:56:40,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:56:40,042 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804191789] [2021-01-06 10:56:40,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:56:40,055 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:56:40,055 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1114581894] [2021-01-06 10:56:40,055 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 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 [2021-01-06 10:56:40,115 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 10:56:40,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:56:40,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 5 conjunts are in the unsatisfiable core [2021-01-06 10:56:40,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:56:40,193 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 13 proven. 13 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-01-06 10:56:40,194 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804191789] [2021-01-06 10:56:40,194 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:56:40,194 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1114581894] [2021-01-06 10:56:40,194 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:56:40,195 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-01-06 10:56:40,195 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396403865] [2021-01-06 10:56:40,195 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-06 10:56:40,195 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:56:40,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-06 10:56:40,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-01-06 10:56:40,196 INFO L87 Difference]: Start difference. First operand 47 states and 55 transitions. Second operand 6 states. [2021-01-06 10:56:40,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:56:40,317 INFO L93 Difference]: Finished difference Result 94 states and 114 transitions. [2021-01-06 10:56:40,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-01-06 10:56:40,318 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 44 [2021-01-06 10:56:40,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:56:40,318 INFO L225 Difference]: With dead ends: 94 [2021-01-06 10:56:40,318 INFO L226 Difference]: Without dead ends: 63 [2021-01-06 10:56:40,319 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2021-01-06 10:56:40,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-01-06 10:56:40,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 56. [2021-01-06 10:56:40,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2021-01-06 10:56:40,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 67 transitions. [2021-01-06 10:56:40,326 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 67 transitions. Word has length 44 [2021-01-06 10:56:40,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:56:40,327 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 67 transitions. [2021-01-06 10:56:40,327 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-01-06 10:56:40,327 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 67 transitions. [2021-01-06 10:56:40,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-01-06 10:56:40,328 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:56:40,328 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:56:40,542 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:56:40,543 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:56:40,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:56:40,544 INFO L82 PathProgramCache]: Analyzing trace with hash -436388146, now seen corresponding path program 3 times [2021-01-06 10:56:40,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:56:40,545 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717802511] [2021-01-06 10:56:40,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:56:40,554 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:56:40,554 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1266936265] [2021-01-06 10:56:40,555 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 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 [2021-01-06 10:56:40,622 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-01-06 10:56:40,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:56:40,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 4 conjunts are in the unsatisfiable core [2021-01-06 10:56:40,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:56:40,709 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-01-06 10:56:40,709 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717802511] [2021-01-06 10:56:40,709 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:56:40,710 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1266936265] [2021-01-06 10:56:40,710 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 10:56:40,714 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-01-06 10:56:40,714 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885871327] [2021-01-06 10:56:40,715 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 10:56:40,716 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:56:40,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 10:56:40,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-01-06 10:56:40,717 INFO L87 Difference]: Start difference. First operand 56 states and 67 transitions. Second operand 5 states. [2021-01-06 10:56:40,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:56:40,800 INFO L93 Difference]: Finished difference Result 88 states and 107 transitions. [2021-01-06 10:56:40,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-06 10:56:40,801 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 45 [2021-01-06 10:56:40,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:56:40,802 INFO L225 Difference]: With dead ends: 88 [2021-01-06 10:56:40,802 INFO L226 Difference]: Without dead ends: 68 [2021-01-06 10:56:40,803 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-01-06 10:56:40,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-01-06 10:56:40,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 66. [2021-01-06 10:56:40,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2021-01-06 10:56:40,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 82 transitions. [2021-01-06 10:56:40,811 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 82 transitions. Word has length 45 [2021-01-06 10:56:40,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:56:40,812 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 82 transitions. [2021-01-06 10:56:40,812 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 10:56:40,812 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 82 transitions. [2021-01-06 10:56:40,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-01-06 10:56:40,813 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:56:40,813 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:56:41,026 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-01-06 10:56:41,027 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:56:41,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:56:41,028 INFO L82 PathProgramCache]: Analyzing trace with hash -570401652, now seen corresponding path program 4 times [2021-01-06 10:56:41,028 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:56:41,028 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040913588] [2021-01-06 10:56:41,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:56:41,037 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:56:41,038 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [506777991] [2021-01-06 10:56:41,038 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 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 [2021-01-06 10:56:41,132 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 10:56:41,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:56:41,134 WARN L261 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 52 conjunts are in the unsatisfiable core [2021-01-06 10:56:41,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:56:41,203 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 20 treesize of output 16 [2021-01-06 10:56:41,204 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:56:41,216 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:56:41,217 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:56:41,221 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:34 [2021-01-06 10:56:41,330 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:56:41,331 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 40 treesize of output 97 [2021-01-06 10:56:41,340 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:56:41,377 INFO L625 ElimStorePlain]: treesize reduction 29, result has 60.8 percent of original size [2021-01-06 10:56:41,378 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:56:41,378 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:52, output treesize:45 [2021-01-06 10:56:41,607 INFO L348 Elim1Store]: treesize reduction 25, result has 86.1 percent of original size [2021-01-06 10:56:41,608 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 56 treesize of output 181 [2021-01-06 10:56:41,615 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:56:41,667 INFO L625 ElimStorePlain]: treesize reduction 77, result has 46.5 percent of original size [2021-01-06 10:56:41,669 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:56:41,670 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:71, output treesize:67 [2021-01-06 10:56:41,872 INFO L348 Elim1Store]: treesize reduction 118, result has 56.9 percent of original size [2021-01-06 10:56:41,873 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 65 treesize of output 181 [2021-01-06 10:56:41,879 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:56:41,934 INFO L625 ElimStorePlain]: treesize reduction 61, result has 54.5 percent of original size [2021-01-06 10:56:41,935 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:56:41,935 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:77, output treesize:73 [2021-01-06 10:56:42,694 INFO L348 Elim1Store]: treesize reduction 27, result has 67.1 percent of original size [2021-01-06 10:56:42,695 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 71 treesize of output 75 [2021-01-06 10:56:42,699 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:56:42,713 INFO L625 ElimStorePlain]: treesize reduction 12, result has 45.5 percent of original size [2021-01-06 10:56:42,718 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:56:42,718 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:77, output treesize:3 [2021-01-06 10:56:42,795 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:56:42,796 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040913588] [2021-01-06 10:56:42,796 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:56:42,796 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [506777991] [2021-01-06 10:56:42,796 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:56:42,796 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2021-01-06 10:56:42,797 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497912457] [2021-01-06 10:56:42,797 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-01-06 10:56:42,797 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:56:42,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-01-06 10:56:42,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=590, Unknown=0, NotChecked=0, Total=702 [2021-01-06 10:56:42,798 INFO L87 Difference]: Start difference. First operand 66 states and 82 transitions. Second operand 27 states. [2021-01-06 10:56:43,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:56:43,722 INFO L93 Difference]: Finished difference Result 163 states and 205 transitions. [2021-01-06 10:56:43,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-01-06 10:56:43,723 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 45 [2021-01-06 10:56:43,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:56:43,724 INFO L225 Difference]: With dead ends: 163 [2021-01-06 10:56:43,725 INFO L226 Difference]: Without dead ends: 113 [2021-01-06 10:56:43,726 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 278 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=139, Invalid=791, Unknown=0, NotChecked=0, Total=930 [2021-01-06 10:56:43,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-01-06 10:56:43,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 96. [2021-01-06 10:56:43,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2021-01-06 10:56:43,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 117 transitions. [2021-01-06 10:56:43,739 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 117 transitions. Word has length 45 [2021-01-06 10:56:43,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:56:43,739 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 117 transitions. [2021-01-06 10:56:43,739 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2021-01-06 10:56:43,739 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 117 transitions. [2021-01-06 10:56:43,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-01-06 10:56:43,740 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:56:43,740 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:56:43,955 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-01-06 10:56:43,956 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:56:43,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:56:43,956 INFO L82 PathProgramCache]: Analyzing trace with hash 1760083758, now seen corresponding path program 5 times [2021-01-06 10:56:43,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:56:43,957 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741504711] [2021-01-06 10:56:43,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:56:43,969 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:56:43,969 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [736831582] [2021-01-06 10:56:43,969 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 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 [2021-01-06 10:56:45,814 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-01-06 10:56:45,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:56:45,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-06 10:56:45,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:56:45,988 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 42 proven. 22 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-01-06 10:56:45,988 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741504711] [2021-01-06 10:56:45,988 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:56:45,988 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [736831582] [2021-01-06 10:56:45,988 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:56:45,989 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-01-06 10:56:45,989 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403776003] [2021-01-06 10:56:45,989 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-01-06 10:56:45,989 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:56:45,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-01-06 10:56:45,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-01-06 10:56:45,990 INFO L87 Difference]: Start difference. First operand 96 states and 117 transitions. Second operand 13 states. [2021-01-06 10:56:46,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:56:46,710 INFO L93 Difference]: Finished difference Result 220 states and 281 transitions. [2021-01-06 10:56:46,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-01-06 10:56:46,711 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 47 [2021-01-06 10:56:46,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:56:46,712 INFO L225 Difference]: With dead ends: 220 [2021-01-06 10:56:46,712 INFO L226 Difference]: Without dead ends: 163 [2021-01-06 10:56:46,714 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 291 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=359, Invalid=973, Unknown=0, NotChecked=0, Total=1332 [2021-01-06 10:56:46,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2021-01-06 10:56:46,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 145. [2021-01-06 10:56:46,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2021-01-06 10:56:46,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 180 transitions. [2021-01-06 10:56:46,730 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 180 transitions. Word has length 47 [2021-01-06 10:56:46,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:56:46,730 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 180 transitions. [2021-01-06 10:56:46,730 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2021-01-06 10:56:46,731 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 180 transitions. [2021-01-06 10:56:46,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-01-06 10:56:46,732 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:56:46,732 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:56:46,945 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-01-06 10:56:46,946 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:56:46,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:56:46,947 INFO L82 PathProgramCache]: Analyzing trace with hash 704019603, now seen corresponding path program 6 times [2021-01-06 10:56:46,947 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:56:46,947 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675797102] [2021-01-06 10:56:46,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:56:46,956 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:56:46,956 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1268078788] [2021-01-06 10:56:46,956 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 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 [2021-01-06 10:56:47,035 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-01-06 10:56:47,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:56:47,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 6 conjunts are in the unsatisfiable core [2021-01-06 10:56:47,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:56:47,128 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 21 proven. 24 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-01-06 10:56:47,128 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675797102] [2021-01-06 10:56:47,129 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:56:47,129 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1268078788] [2021-01-06 10:56:47,129 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:56:47,129 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-01-06 10:56:47,129 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723894379] [2021-01-06 10:56:47,130 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-06 10:56:47,130 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:56:47,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-06 10:56:47,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-01-06 10:56:47,131 INFO L87 Difference]: Start difference. First operand 145 states and 180 transitions. Second operand 7 states. [2021-01-06 10:56:47,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:56:47,311 INFO L93 Difference]: Finished difference Result 261 states and 326 transitions. [2021-01-06 10:56:47,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-06 10:56:47,312 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 49 [2021-01-06 10:56:47,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:56:47,313 INFO L225 Difference]: With dead ends: 261 [2021-01-06 10:56:47,313 INFO L226 Difference]: Without dead ends: 151 [2021-01-06 10:56:47,314 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2021-01-06 10:56:47,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-01-06 10:56:47,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 139. [2021-01-06 10:56:47,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2021-01-06 10:56:47,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 169 transitions. [2021-01-06 10:56:47,328 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 169 transitions. Word has length 49 [2021-01-06 10:56:47,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:56:47,328 INFO L481 AbstractCegarLoop]: Abstraction has 139 states and 169 transitions. [2021-01-06 10:56:47,329 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-01-06 10:56:47,329 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 169 transitions. [2021-01-06 10:56:47,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-01-06 10:56:47,329 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:56:47,330 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:56:47,542 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:56:47,543 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:56:47,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:56:47,544 INFO L82 PathProgramCache]: Analyzing trace with hash -1606181739, now seen corresponding path program 7 times [2021-01-06 10:56:47,544 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:56:47,544 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669628820] [2021-01-06 10:56:47,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:56:47,552 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:56:47,553 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1176778513] [2021-01-06 10:56:47,553 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 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 [2021-01-06 10:56:47,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:56:47,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 8 conjunts are in the unsatisfiable core [2021-01-06 10:56:47,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:56:47,708 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 18 proven. 33 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-01-06 10:56:47,708 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669628820] [2021-01-06 10:56:47,708 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:56:47,709 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1176778513] [2021-01-06 10:56:47,709 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:56:47,709 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-01-06 10:56:47,709 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95863931] [2021-01-06 10:56:47,709 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-01-06 10:56:47,710 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:56:47,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-01-06 10:56:47,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-01-06 10:56:47,710 INFO L87 Difference]: Start difference. First operand 139 states and 169 transitions. Second operand 9 states. [2021-01-06 10:56:47,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:56:47,939 INFO L93 Difference]: Finished difference Result 265 states and 324 transitions. [2021-01-06 10:56:47,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-06 10:56:47,939 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 49 [2021-01-06 10:56:47,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:56:47,941 INFO L225 Difference]: With dead ends: 265 [2021-01-06 10:56:47,941 INFO L226 Difference]: Without dead ends: 164 [2021-01-06 10:56:47,941 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-01-06 10:56:47,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2021-01-06 10:56:47,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 144. [2021-01-06 10:56:47,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2021-01-06 10:56:47,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 170 transitions. [2021-01-06 10:56:47,956 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 170 transitions. Word has length 49 [2021-01-06 10:56:47,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:56:47,957 INFO L481 AbstractCegarLoop]: Abstraction has 144 states and 170 transitions. [2021-01-06 10:56:47,957 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-01-06 10:56:47,957 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 170 transitions. [2021-01-06 10:56:47,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-01-06 10:56:47,958 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:56:47,958 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:56:48,171 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-01-06 10:56:48,172 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:56:48,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:56:48,173 INFO L82 PathProgramCache]: Analyzing trace with hash 2144493023, now seen corresponding path program 8 times [2021-01-06 10:56:48,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:56:48,173 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174061953] [2021-01-06 10:56:48,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:56:48,181 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:56:48,182 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [108944985] [2021-01-06 10:56:48,182 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 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 [2021-01-06 10:56:48,239 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 10:56:48,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:56:48,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 8 conjunts are in the unsatisfiable core [2021-01-06 10:56:48,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:56:48,350 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 43 proven. 25 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-01-06 10:56:48,350 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174061953] [2021-01-06 10:56:48,351 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:56:48,351 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [108944985] [2021-01-06 10:56:48,351 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:56:48,351 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-01-06 10:56:48,351 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501923882] [2021-01-06 10:56:48,352 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-01-06 10:56:48,352 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:56:48,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-01-06 10:56:48,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-01-06 10:56:48,353 INFO L87 Difference]: Start difference. First operand 144 states and 170 transitions. Second operand 9 states. [2021-01-06 10:56:48,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:56:48,596 INFO L93 Difference]: Finished difference Result 167 states and 197 transitions. [2021-01-06 10:56:48,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 10:56:48,597 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 54 [2021-01-06 10:56:48,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:56:48,598 INFO L225 Difference]: With dead ends: 167 [2021-01-06 10:56:48,598 INFO L226 Difference]: Without dead ends: 124 [2021-01-06 10:56:48,601 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=114, Unknown=0, NotChecked=0, Total=182 [2021-01-06 10:56:48,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-01-06 10:56:48,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 105. [2021-01-06 10:56:48,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2021-01-06 10:56:48,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 128 transitions. [2021-01-06 10:56:48,617 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 128 transitions. Word has length 54 [2021-01-06 10:56:48,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:56:48,617 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 128 transitions. [2021-01-06 10:56:48,617 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-01-06 10:56:48,617 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 128 transitions. [2021-01-06 10:56:48,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-01-06 10:56:48,618 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:56:48,618 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 6, 6, 5, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:56:48,831 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-01-06 10:56:48,832 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:56:48,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:56:48,833 INFO L82 PathProgramCache]: Analyzing trace with hash 363268227, now seen corresponding path program 9 times [2021-01-06 10:56:48,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:56:48,833 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913667571] [2021-01-06 10:56:48,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:56:48,841 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:56:48,841 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1801229155] [2021-01-06 10:56:48,842 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 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