/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-dcfa08f [2020-12-23 01:03:06,615 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-23 01:03:06,620 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-23 01:03:06,681 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-23 01:03:06,681 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-23 01:03:06,687 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-23 01:03:06,691 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-23 01:03:06,697 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-23 01:03:06,701 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-23 01:03:06,709 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-23 01:03:06,714 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-23 01:03:06,715 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-23 01:03:06,716 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-23 01:03:06,720 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-23 01:03:06,722 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-23 01:03:06,724 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-23 01:03:06,725 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-23 01:03:06,729 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-23 01:03:06,737 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-23 01:03:06,740 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-23 01:03:06,742 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-23 01:03:06,743 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-23 01:03:06,745 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-23 01:03:06,746 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-23 01:03:06,749 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-23 01:03:06,759 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-23 01:03:06,760 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-23 01:03:06,761 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-23 01:03:06,762 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-23 01:03:06,805 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-23 01:03:06,805 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-23 01:03:06,807 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-23 01:03:06,808 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-23 01:03:06,810 INFO L138 SettingsManager]: * Use SBE=true [2020-12-23 01:03:06,810 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-23 01:03:06,810 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-23 01:03:06,811 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-23 01:03:06,811 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-23 01:03:06,811 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-23 01:03:06,811 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-23 01:03:06,811 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-23 01:03:06,812 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-23 01:03:06,812 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-23 01:03:06,813 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-23 01:03:06,813 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-23 01:03:06,814 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-23 01:03:06,814 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 01:03:06,814 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-23 01:03:06,814 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-23 01:03:06,815 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-23 01:03:06,815 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-23 01:03:06,815 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-23 01:03:06,815 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-23 01:03:06,815 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-23 01:03:06,815 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-23 01:03:07,252 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-23 01:03:07,284 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-23 01:03:07,287 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-23 01:03:07,289 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-23 01:03:07,290 INFO L275 PluginConnector]: CDTParser initialized [2020-12-23 01:03:07,291 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-patterns/array28_pattern.c [2020-12-23 01:03:07,372 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/b84d0ea73/a14f051bec78469c987ae3da674620b4/FLAG2b929818d [2020-12-23 01:03:08,002 INFO L306 CDTParser]: Found 1 translation units. [2020-12-23 01:03:08,003 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-patterns/array28_pattern.c [2020-12-23 01:03:08,013 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/b84d0ea73/a14f051bec78469c987ae3da674620b4/FLAG2b929818d [2020-12-23 01:03:08,306 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/b84d0ea73/a14f051bec78469c987ae3da674620b4 [2020-12-23 01:03:08,309 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-23 01:03:08,313 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-23 01:03:08,316 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-23 01:03:08,316 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-23 01:03:08,321 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-23 01:03:08,323 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 01:03:08" (1/1) ... [2020-12-23 01:03:08,325 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@32065ba0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:03:08, skipping insertion in model container [2020-12-23 01:03:08,326 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 01:03:08" (1/1) ... [2020-12-23 01:03:08,335 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-23 01:03:08,357 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-23 01:03:08,508 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,] [2020-12-23 01:03:08,542 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 01:03:08,550 INFO L203 MainTranslator]: Completed pre-run [2020-12-23 01:03:08,563 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,] [2020-12-23 01:03:08,574 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 01:03:08,591 INFO L208 MainTranslator]: Completed translation [2020-12-23 01:03:08,592 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:03:08 WrapperNode [2020-12-23 01:03:08,592 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-23 01:03:08,593 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-23 01:03:08,594 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-23 01:03:08,594 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-23 01:03:08,603 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:03:08" (1/1) ... [2020-12-23 01:03:08,612 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:03:08" (1/1) ... [2020-12-23 01:03:08,638 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-23 01:03:08,639 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-23 01:03:08,640 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-23 01:03:08,640 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-23 01:03:08,650 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:03:08" (1/1) ... [2020-12-23 01:03:08,650 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:03:08" (1/1) ... [2020-12-23 01:03:08,652 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:03:08" (1/1) ... [2020-12-23 01:03:08,653 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:03:08" (1/1) ... [2020-12-23 01:03:08,659 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:03:08" (1/1) ... [2020-12-23 01:03:08,664 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:03:08" (1/1) ... [2020-12-23 01:03:08,666 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:03:08" (1/1) ... [2020-12-23 01:03:08,669 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-23 01:03:08,670 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-23 01:03:08,670 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-23 01:03:08,670 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-23 01:03:08,671 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:03:08" (1/1) ... No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 01:03:08,792 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-23 01:03:08,792 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-23 01:03:08,792 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-23 01:03:08,792 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-23 01:03:08,793 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-23 01:03:08,793 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-23 01:03:08,793 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-23 01:03:09,229 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-23 01:03:09,229 INFO L299 CfgBuilder]: Removed 12 assume(true) statements. [2020-12-23 01:03:09,231 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 01:03:09 BoogieIcfgContainer [2020-12-23 01:03:09,231 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-23 01:03:09,234 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-23 01:03:09,234 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-23 01:03:09,239 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-23 01:03:09,240 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.12 01:03:08" (1/3) ... [2020-12-23 01:03:09,241 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67e3e2b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 01:03:09, skipping insertion in model container [2020-12-23 01:03:09,241 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:03:08" (2/3) ... [2020-12-23 01:03:09,241 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67e3e2b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 01:03:09, skipping insertion in model container [2020-12-23 01:03:09,242 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 01:03:09" (3/3) ... [2020-12-23 01:03:09,244 INFO L111 eAbstractionObserver]: Analyzing ICFG array28_pattern.c [2020-12-23 01:03:09,252 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-23 01:03:09,259 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-23 01:03:09,360 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-23 01:03:09,424 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-23 01:03:09,424 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-23 01:03:09,424 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-23 01:03:09,424 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-23 01:03:09,424 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-23 01:03:09,425 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-23 01:03:09,425 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-23 01:03:09,425 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-23 01:03:09,443 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states. [2020-12-23 01:03:09,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-23 01:03:09,450 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:03:09,451 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:03:09,451 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:03:09,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:03:09,459 INFO L82 PathProgramCache]: Analyzing trace with hash -320975489, now seen corresponding path program 1 times [2020-12-23 01:03:09,471 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:03:09,472 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862438658] [2020-12-23 01:03:09,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:03:09,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:03:09,648 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:03:09,649 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862438658] [2020-12-23 01:03:09,650 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 01:03:09,650 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-23 01:03:09,651 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666699276] [2020-12-23 01:03:09,656 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-23 01:03:09,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:03:09,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-23 01:03:09,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-23 01:03:09,676 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 2 states. [2020-12-23 01:03:09,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:03:09,697 INFO L93 Difference]: Finished difference Result 43 states and 64 transitions. [2020-12-23 01:03:09,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-23 01:03:09,699 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2020-12-23 01:03:09,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:03:09,709 INFO L225 Difference]: With dead ends: 43 [2020-12-23 01:03:09,709 INFO L226 Difference]: Without dead ends: 19 [2020-12-23 01:03:09,713 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 [2020-12-23 01:03:09,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-12-23 01:03:09,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-12-23 01:03:09,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-12-23 01:03:09,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 24 transitions. [2020-12-23 01:03:09,753 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 24 transitions. Word has length 10 [2020-12-23 01:03:09,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:03:09,754 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 24 transitions. [2020-12-23 01:03:09,754 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-23 01:03:09,754 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 24 transitions. [2020-12-23 01:03:09,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-23 01:03:09,755 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:03:09,755 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:03:09,755 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-23 01:03:09,756 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:03:09,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:03:09,757 INFO L82 PathProgramCache]: Analyzing trace with hash -1931938343, now seen corresponding path program 1 times [2020-12-23 01:03:09,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:03:09,758 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348688969] [2020-12-23 01:03:09,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:03:09,778 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 01:03:09,778 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [605296586] [2020-12-23 01:03:09,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:03:09,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:03:09,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-23 01:03:09,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:03:09,982 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:03:09,983 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348688969] [2020-12-23 01:03:09,983 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 01:03:09,984 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [605296586] [2020-12-23 01:03:09,984 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 01:03:09,984 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-23 01:03:09,985 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375722170] [2020-12-23 01:03:09,986 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 01:03:09,987 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:03:09,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 01:03:09,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-23 01:03:09,989 INFO L87 Difference]: Start difference. First operand 19 states and 24 transitions. Second operand 5 states. [2020-12-23 01:03:10,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:03:10,128 INFO L93 Difference]: Finished difference Result 38 states and 50 transitions. [2020-12-23 01:03:10,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 01:03:10,129 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2020-12-23 01:03:10,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:03:10,130 INFO L225 Difference]: With dead ends: 38 [2020-12-23 01:03:10,130 INFO L226 Difference]: Without dead ends: 29 [2020-12-23 01:03:10,132 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-12-23 01:03:10,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-12-23 01:03:10,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 21. [2020-12-23 01:03:10,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-12-23 01:03:10,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 26 transitions. [2020-12-23 01:03:10,140 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 26 transitions. Word has length 10 [2020-12-23 01:03:10,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:03:10,140 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 26 transitions. [2020-12-23 01:03:10,140 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 01:03:10,141 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 26 transitions. [2020-12-23 01:03:10,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-23 01:03:10,141 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:03:10,142 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:03:10,356 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-12-23 01:03:10,357 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:03:10,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:03:10,358 INFO L82 PathProgramCache]: Analyzing trace with hash -438331433, now seen corresponding path program 1 times [2020-12-23 01:03:10,359 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:03:10,359 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744902197] [2020-12-23 01:03:10,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:03:10,374 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 01:03:10,375 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [398657345] [2020-12-23 01:03:10,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:03:10,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:03:10,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-23 01:03:10,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:03:10,487 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 01:03:10,488 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744902197] [2020-12-23 01:03:10,488 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 01:03:10,488 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [398657345] [2020-12-23 01:03:10,488 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 01:03:10,489 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-23 01:03:10,489 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638872036] [2020-12-23 01:03:10,490 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 01:03:10,490 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:03:10,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 01:03:10,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-23 01:03:10,491 INFO L87 Difference]: Start difference. First operand 21 states and 26 transitions. Second operand 4 states. [2020-12-23 01:03:10,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:03:10,584 INFO L93 Difference]: Finished difference Result 43 states and 57 transitions. [2020-12-23 01:03:10,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 01:03:10,585 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2020-12-23 01:03:10,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:03:10,586 INFO L225 Difference]: With dead ends: 43 [2020-12-23 01:03:10,586 INFO L226 Difference]: Without dead ends: 27 [2020-12-23 01:03:10,587 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 [2020-12-23 01:03:10,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-12-23 01:03:10,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 25. [2020-12-23 01:03:10,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-12-23 01:03:10,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 31 transitions. [2020-12-23 01:03:10,594 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 31 transitions. Word has length 16 [2020-12-23 01:03:10,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:03:10,595 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 31 transitions. [2020-12-23 01:03:10,595 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 01:03:10,595 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 31 transitions. [2020-12-23 01:03:10,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-12-23 01:03:10,596 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:03:10,597 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] [2020-12-23 01:03:10,811 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:03:10,812 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:03:10,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:03:10,814 INFO L82 PathProgramCache]: Analyzing trace with hash -308201553, now seen corresponding path program 1 times [2020-12-23 01:03:10,815 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:03:10,815 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737045670] [2020-12-23 01:03:10,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:03:10,830 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 01:03:10,831 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1443189521] [2020-12-23 01:03:10,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:03:10,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:03:10,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-23 01:03:10,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:03:11,004 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-23 01:03:11,005 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737045670] [2020-12-23 01:03:11,006 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 01:03:11,006 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1443189521] [2020-12-23 01:03:11,006 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 01:03:11,007 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-23 01:03:11,007 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931354188] [2020-12-23 01:03:11,007 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 01:03:11,009 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:03:11,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 01:03:11,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-23 01:03:11,010 INFO L87 Difference]: Start difference. First operand 25 states and 31 transitions. Second operand 4 states. [2020-12-23 01:03:11,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:03:11,099 INFO L93 Difference]: Finished difference Result 57 states and 74 transitions. [2020-12-23 01:03:11,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 01:03:11,100 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2020-12-23 01:03:11,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:03:11,105 INFO L225 Difference]: With dead ends: 57 [2020-12-23 01:03:11,106 INFO L226 Difference]: Without dead ends: 37 [2020-12-23 01:03:11,107 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 [2020-12-23 01:03:11,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-12-23 01:03:11,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 32. [2020-12-23 01:03:11,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-12-23 01:03:11,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 40 transitions. [2020-12-23 01:03:11,129 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 40 transitions. Word has length 21 [2020-12-23 01:03:11,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:03:11,129 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 40 transitions. [2020-12-23 01:03:11,130 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 01:03:11,130 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 40 transitions. [2020-12-23 01:03:11,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-12-23 01:03:11,131 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:03:11,131 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] [2020-12-23 01:03:11,344 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:03:11,345 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:03:11,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:03:11,346 INFO L82 PathProgramCache]: Analyzing trace with hash 1924412114, now seen corresponding path program 1 times [2020-12-23 01:03:11,346 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:03:11,347 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778988001] [2020-12-23 01:03:11,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:03:11,362 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 01:03:11,362 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [412431193] [2020-12-23 01:03:11,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:03:11,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:03:11,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 25 conjunts are in the unsatisfiable core [2020-12-23 01:03:11,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:03:11,542 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 [2020-12-23 01:03:11,543 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:03:11,551 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:03:11,553 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 01:03:11,553 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:18, output treesize:14 [2020-12-23 01:03:11,646 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2020-12-23 01:03:11,647 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:03:11,650 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:03:11,651 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 01:03:11,651 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:15, output treesize:3 [2020-12-23 01:03:11,681 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:03:11,681 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778988001] [2020-12-23 01:03:11,681 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 01:03:11,682 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [412431193] [2020-12-23 01:03:11,682 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 01:03:11,682 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-12-23 01:03:11,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326394472] [2020-12-23 01:03:11,683 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-23 01:03:11,684 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:03:11,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-23 01:03:11,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-12-23 01:03:11,685 INFO L87 Difference]: Start difference. First operand 32 states and 40 transitions. Second operand 11 states. [2020-12-23 01:03:12,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:03:12,123 INFO L93 Difference]: Finished difference Result 56 states and 70 transitions. [2020-12-23 01:03:12,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-23 01:03:12,124 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 22 [2020-12-23 01:03:12,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:03:12,127 INFO L225 Difference]: With dead ends: 56 [2020-12-23 01:03:12,127 INFO L226 Difference]: Without dead ends: 52 [2020-12-23 01:03:12,129 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=110, Invalid=232, Unknown=0, NotChecked=0, Total=342 [2020-12-23 01:03:12,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-12-23 01:03:12,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 47. [2020-12-23 01:03:12,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-12-23 01:03:12,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 61 transitions. [2020-12-23 01:03:12,152 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 61 transitions. Word has length 22 [2020-12-23 01:03:12,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:03:12,153 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 61 transitions. [2020-12-23 01:03:12,153 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-23 01:03:12,153 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 61 transitions. [2020-12-23 01:03:12,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-12-23 01:03:12,155 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:03:12,155 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] [2020-12-23 01:03:12,368 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:03:12,369 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:03:12,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:03:12,371 INFO L82 PathProgramCache]: Analyzing trace with hash -1610605580, now seen corresponding path program 2 times [2020-12-23 01:03:12,371 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:03:12,372 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202313275] [2020-12-23 01:03:12,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:03:12,386 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 01:03:12,386 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [41211279] [2020-12-23 01:03:12,387 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 [2020-12-23 01:03:12,444 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 01:03:12,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:03:12,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-23 01:03:12,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:03:12,546 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:03:12,546 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202313275] [2020-12-23 01:03:12,546 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 01:03:12,546 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [41211279] [2020-12-23 01:03:12,547 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 01:03:12,547 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-12-23 01:03:12,547 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078962256] [2020-12-23 01:03:12,547 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-23 01:03:12,548 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:03:12,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-23 01:03:12,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-23 01:03:12,549 INFO L87 Difference]: Start difference. First operand 47 states and 61 transitions. Second operand 7 states. [2020-12-23 01:03:12,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:03:12,729 INFO L93 Difference]: Finished difference Result 145 states and 190 transitions. [2020-12-23 01:03:12,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-23 01:03:12,729 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 24 [2020-12-23 01:03:12,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:03:12,735 INFO L225 Difference]: With dead ends: 145 [2020-12-23 01:03:12,736 INFO L226 Difference]: Without dead ends: 110 [2020-12-23 01:03:12,737 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 [2020-12-23 01:03:12,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-12-23 01:03:12,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 81. [2020-12-23 01:03:12,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-12-23 01:03:12,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 104 transitions. [2020-12-23 01:03:12,773 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 104 transitions. Word has length 24 [2020-12-23 01:03:12,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:03:12,773 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 104 transitions. [2020-12-23 01:03:12,773 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-23 01:03:12,774 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 104 transitions. [2020-12-23 01:03:12,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-12-23 01:03:12,775 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:03:12,776 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] [2020-12-23 01:03:12,987 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-12-23 01:03:12,988 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:03:12,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:03:12,989 INFO L82 PathProgramCache]: Analyzing trace with hash -1861003047, now seen corresponding path program 3 times [2020-12-23 01:03:12,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:03:12,990 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855819607] [2020-12-23 01:03:12,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:03:13,005 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 01:03:13,005 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [656548755] [2020-12-23 01:03:13,005 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:03:13,075 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-12-23 01:03:13,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:03:13,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-23 01:03:13,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:03:13,172 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-23 01:03:13,174 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855819607] [2020-12-23 01:03:13,177 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 01:03:13,177 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [656548755] [2020-12-23 01:03:13,177 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 01:03:13,178 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-12-23 01:03:13,178 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010998506] [2020-12-23 01:03:13,178 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-23 01:03:13,178 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:03:13,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-23 01:03:13,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-23 01:03:13,179 INFO L87 Difference]: Start difference. First operand 81 states and 104 transitions. Second operand 7 states. [2020-12-23 01:03:13,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:03:13,324 INFO L93 Difference]: Finished difference Result 174 states and 219 transitions. [2020-12-23 01:03:13,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-23 01:03:13,324 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 27 [2020-12-23 01:03:13,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:03:13,326 INFO L225 Difference]: With dead ends: 174 [2020-12-23 01:03:13,326 INFO L226 Difference]: Without dead ends: 151 [2020-12-23 01:03:13,327 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 [2020-12-23 01:03:13,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2020-12-23 01:03:13,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 94. [2020-12-23 01:03:13,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-12-23 01:03:13,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 119 transitions. [2020-12-23 01:03:13,342 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 119 transitions. Word has length 27 [2020-12-23 01:03:13,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:03:13,342 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 119 transitions. [2020-12-23 01:03:13,342 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-23 01:03:13,342 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 119 transitions. [2020-12-23 01:03:13,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-12-23 01:03:13,344 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:03:13,344 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] [2020-12-23 01:03:13,557 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:03:13,558 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:03:13,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:03:13,559 INFO L82 PathProgramCache]: Analyzing trace with hash 1161564239, now seen corresponding path program 1 times [2020-12-23 01:03:13,559 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:03:13,560 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35521753] [2020-12-23 01:03:13,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:03:13,571 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 01:03:13,571 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1367501160] [2020-12-23 01:03:13,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:03:13,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:03:13,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-23 01:03:13,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:03:13,727 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-23 01:03:13,728 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35521753] [2020-12-23 01:03:13,728 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 01:03:13,728 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1367501160] [2020-12-23 01:03:13,728 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 01:03:13,728 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-12-23 01:03:13,729 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705544013] [2020-12-23 01:03:13,729 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-23 01:03:13,729 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:03:13,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-23 01:03:13,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-23 01:03:13,730 INFO L87 Difference]: Start difference. First operand 94 states and 119 transitions. Second operand 7 states. [2020-12-23 01:03:13,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:03:13,898 INFO L93 Difference]: Finished difference Result 131 states and 162 transitions. [2020-12-23 01:03:13,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-23 01:03:13,899 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 28 [2020-12-23 01:03:13,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:03:13,899 INFO L225 Difference]: With dead ends: 131 [2020-12-23 01:03:13,900 INFO L226 Difference]: Without dead ends: 89 [2020-12-23 01:03:13,900 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 [2020-12-23 01:03:13,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-12-23 01:03:13,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 72. [2020-12-23 01:03:13,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-12-23 01:03:13,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 89 transitions. [2020-12-23 01:03:13,911 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 89 transitions. Word has length 28 [2020-12-23 01:03:13,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:03:13,911 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 89 transitions. [2020-12-23 01:03:13,911 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-23 01:03:13,911 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 89 transitions. [2020-12-23 01:03:13,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-12-23 01:03:13,912 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:03:13,913 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] [2020-12-23 01:03:14,121 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:03:14,122 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:03:14,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:03:14,123 INFO L82 PathProgramCache]: Analyzing trace with hash -1512912821, now seen corresponding path program 1 times [2020-12-23 01:03:14,123 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:03:14,125 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068392026] [2020-12-23 01:03:14,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:03:14,135 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 01:03:14,135 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1455493459] [2020-12-23 01:03:14,136 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 [2020-12-23 01:03:14,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:03:14,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-23 01:03:14,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:03:14,294 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-23 01:03:14,294 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068392026] [2020-12-23 01:03:14,295 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 01:03:14,295 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1455493459] [2020-12-23 01:03:14,295 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 01:03:14,295 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-12-23 01:03:14,295 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279824305] [2020-12-23 01:03:14,296 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-23 01:03:14,296 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:03:14,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-23 01:03:14,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2020-12-23 01:03:14,297 INFO L87 Difference]: Start difference. First operand 72 states and 89 transitions. Second operand 7 states. [2020-12-23 01:03:14,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:03:14,412 INFO L93 Difference]: Finished difference Result 160 states and 206 transitions. [2020-12-23 01:03:14,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-23 01:03:14,412 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 28 [2020-12-23 01:03:14,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:03:14,413 INFO L225 Difference]: With dead ends: 160 [2020-12-23 01:03:14,414 INFO L226 Difference]: Without dead ends: 98 [2020-12-23 01:03:14,414 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 [2020-12-23 01:03:14,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-12-23 01:03:14,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 72. [2020-12-23 01:03:14,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-12-23 01:03:14,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 88 transitions. [2020-12-23 01:03:14,424 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 88 transitions. Word has length 28 [2020-12-23 01:03:14,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:03:14,424 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 88 transitions. [2020-12-23 01:03:14,424 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-23 01:03:14,425 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 88 transitions. [2020-12-23 01:03:14,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-12-23 01:03:14,426 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:03:14,426 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] [2020-12-23 01:03:14,640 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-12-23 01:03:14,641 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:03:14,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:03:14,642 INFO L82 PathProgramCache]: Analyzing trace with hash -1901938394, now seen corresponding path program 1 times [2020-12-23 01:03:14,642 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:03:14,643 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876635347] [2020-12-23 01:03:14,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:03:14,654 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 01:03:14,654 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [967559351] [2020-12-23 01:03:14,654 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 [2020-12-23 01:03:14,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:03:14,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-23 01:03:14,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:03:14,790 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 9 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-23 01:03:14,791 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876635347] [2020-12-23 01:03:14,791 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 01:03:14,791 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [967559351] [2020-12-23 01:03:14,791 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 01:03:14,792 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-12-23 01:03:14,792 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871402437] [2020-12-23 01:03:14,792 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-23 01:03:14,792 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:03:14,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-23 01:03:14,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-23 01:03:14,793 INFO L87 Difference]: Start difference. First operand 72 states and 88 transitions. Second operand 7 states. [2020-12-23 01:03:14,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:03:14,925 INFO L93 Difference]: Finished difference Result 84 states and 103 transitions. [2020-12-23 01:03:14,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-23 01:03:14,925 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 32 [2020-12-23 01:03:14,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:03:14,926 INFO L225 Difference]: With dead ends: 84 [2020-12-23 01:03:14,926 INFO L226 Difference]: Without dead ends: 71 [2020-12-23 01:03:14,927 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 [2020-12-23 01:03:14,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-12-23 01:03:14,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 47. [2020-12-23 01:03:14,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-12-23 01:03:14,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 55 transitions. [2020-12-23 01:03:14,933 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 55 transitions. Word has length 32 [2020-12-23 01:03:14,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:03:14,934 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 55 transitions. [2020-12-23 01:03:14,934 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-23 01:03:14,934 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 55 transitions. [2020-12-23 01:03:14,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-12-23 01:03:14,935 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:03:14,935 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] [2020-12-23 01:03:15,148 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:03:15,149 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:03:15,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:03:15,150 INFO L82 PathProgramCache]: Analyzing trace with hash -533293431, now seen corresponding path program 2 times [2020-12-23 01:03:15,150 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:03:15,151 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216630153] [2020-12-23 01:03:15,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:03:15,165 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 01:03:15,165 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [410920571] [2020-12-23 01:03:15,165 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 [2020-12-23 01:03:15,223 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 01:03:15,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:03:15,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-23 01:03:15,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:03:15,300 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 13 proven. 13 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2020-12-23 01:03:15,301 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216630153] [2020-12-23 01:03:15,301 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 01:03:15,301 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [410920571] [2020-12-23 01:03:15,302 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 01:03:15,302 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-12-23 01:03:15,302 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88201211] [2020-12-23 01:03:15,302 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 01:03:15,303 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:03:15,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 01:03:15,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-12-23 01:03:15,303 INFO L87 Difference]: Start difference. First operand 47 states and 55 transitions. Second operand 6 states. [2020-12-23 01:03:15,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:03:15,439 INFO L93 Difference]: Finished difference Result 94 states and 114 transitions. [2020-12-23 01:03:15,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-23 01:03:15,439 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 44 [2020-12-23 01:03:15,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:03:15,440 INFO L225 Difference]: With dead ends: 94 [2020-12-23 01:03:15,441 INFO L226 Difference]: Without dead ends: 63 [2020-12-23 01:03:15,449 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 [2020-12-23 01:03:15,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-12-23 01:03:15,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 56. [2020-12-23 01:03:15,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-12-23 01:03:15,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 67 transitions. [2020-12-23 01:03:15,465 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 67 transitions. Word has length 44 [2020-12-23 01:03:15,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:03:15,465 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 67 transitions. [2020-12-23 01:03:15,465 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 01:03:15,466 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 67 transitions. [2020-12-23 01:03:15,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-12-23 01:03:15,469 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:03:15,469 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] [2020-12-23 01:03:15,671 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:03:15,672 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:03:15,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:03:15,673 INFO L82 PathProgramCache]: Analyzing trace with hash -436388146, now seen corresponding path program 3 times [2020-12-23 01:03:15,674 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:03:15,674 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856848049] [2020-12-23 01:03:15,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:03:15,697 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 01:03:15,697 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1970507589] [2020-12-23 01:03:15,698 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 [2020-12-23 01:03:15,762 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-12-23 01:03:15,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:03:15,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-23 01:03:15,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:03:15,857 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2020-12-23 01:03:15,857 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856848049] [2020-12-23 01:03:15,858 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 01:03:15,858 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1970507589] [2020-12-23 01:03:15,858 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 01:03:15,858 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-23 01:03:15,858 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105596912] [2020-12-23 01:03:15,859 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 01:03:15,859 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:03:15,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 01:03:15,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-23 01:03:15,860 INFO L87 Difference]: Start difference. First operand 56 states and 67 transitions. Second operand 5 states. [2020-12-23 01:03:15,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:03:15,948 INFO L93 Difference]: Finished difference Result 88 states and 107 transitions. [2020-12-23 01:03:15,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 01:03:15,949 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 45 [2020-12-23 01:03:15,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:03:15,949 INFO L225 Difference]: With dead ends: 88 [2020-12-23 01:03:15,950 INFO L226 Difference]: Without dead ends: 68 [2020-12-23 01:03:15,950 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 [2020-12-23 01:03:15,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-12-23 01:03:15,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 66. [2020-12-23 01:03:15,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-12-23 01:03:15,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 82 transitions. [2020-12-23 01:03:15,962 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 82 transitions. Word has length 45 [2020-12-23 01:03:15,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:03:15,965 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 82 transitions. [2020-12-23 01:03:15,965 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 01:03:15,965 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 82 transitions. [2020-12-23 01:03:15,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-12-23 01:03:15,966 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:03:15,966 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] [2020-12-23 01:03:16,180 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-12-23 01:03:16,181 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:03:16,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:03:16,182 INFO L82 PathProgramCache]: Analyzing trace with hash -570401652, now seen corresponding path program 4 times [2020-12-23 01:03:16,182 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:03:16,182 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625645040] [2020-12-23 01:03:16,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:03:16,192 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 01:03:16,192 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1971263812] [2020-12-23 01:03:16,192 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 [2020-12-23 01:03:16,297 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 01:03:16,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:03:16,300 WARN L261 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 52 conjunts are in the unsatisfiable core [2020-12-23 01:03:16,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:03:16,362 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 [2020-12-23 01:03:16,363 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:03:16,377 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:03:16,378 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 01:03:16,382 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:34 [2020-12-23 01:03:16,509 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:03:16,509 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 [2020-12-23 01:03:16,518 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:03:16,554 INFO L625 ElimStorePlain]: treesize reduction 29, result has 60.8 percent of original size [2020-12-23 01:03:16,558 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 01:03:16,558 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:52, output treesize:45 [2020-12-23 01:03:16,795 INFO L348 Elim1Store]: treesize reduction 25, result has 86.1 percent of original size [2020-12-23 01:03:16,796 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 [2020-12-23 01:03:16,804 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:03:16,862 INFO L625 ElimStorePlain]: treesize reduction 77, result has 46.5 percent of original size [2020-12-23 01:03:16,864 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 01:03:16,864 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:71, output treesize:67 [2020-12-23 01:03:17,067 INFO L348 Elim1Store]: treesize reduction 118, result has 56.9 percent of original size [2020-12-23 01:03:17,068 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 [2020-12-23 01:03:17,074 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:03:17,144 INFO L625 ElimStorePlain]: treesize reduction 61, result has 54.5 percent of original size [2020-12-23 01:03:17,145 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 01:03:17,146 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:77, output treesize:73 [2020-12-23 01:03:17,942 INFO L348 Elim1Store]: treesize reduction 27, result has 67.1 percent of original size [2020-12-23 01:03:17,942 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 [2020-12-23 01:03:17,947 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:03:17,960 INFO L625 ElimStorePlain]: treesize reduction 12, result has 45.5 percent of original size [2020-12-23 01:03:17,964 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 01:03:17,965 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:77, output treesize:3 [2020-12-23 01:03:18,049 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:03:18,050 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625645040] [2020-12-23 01:03:18,050 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 01:03:18,050 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1971263812] [2020-12-23 01:03:18,050 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 01:03:18,051 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-12-23 01:03:18,051 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941641443] [2020-12-23 01:03:18,051 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-12-23 01:03:18,051 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:03:18,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-12-23 01:03:18,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=590, Unknown=0, NotChecked=0, Total=702 [2020-12-23 01:03:18,053 INFO L87 Difference]: Start difference. First operand 66 states and 82 transitions. Second operand 27 states. [2020-12-23 01:03:19,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:03:19,011 INFO L93 Difference]: Finished difference Result 163 states and 205 transitions. [2020-12-23 01:03:19,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-12-23 01:03:19,011 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 45 [2020-12-23 01:03:19,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:03:19,012 INFO L225 Difference]: With dead ends: 163 [2020-12-23 01:03:19,013 INFO L226 Difference]: Without dead ends: 113 [2020-12-23 01:03:19,014 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 [2020-12-23 01:03:19,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-12-23 01:03:19,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 96. [2020-12-23 01:03:19,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-12-23 01:03:19,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 117 transitions. [2020-12-23 01:03:19,026 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 117 transitions. Word has length 45 [2020-12-23 01:03:19,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:03:19,026 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 117 transitions. [2020-12-23 01:03:19,026 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-12-23 01:03:19,026 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 117 transitions. [2020-12-23 01:03:19,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-12-23 01:03:19,027 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:03:19,027 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] [2020-12-23 01:03:19,241 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-12-23 01:03:19,242 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:03:19,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:03:19,243 INFO L82 PathProgramCache]: Analyzing trace with hash 1760083758, now seen corresponding path program 5 times [2020-12-23 01:03:19,243 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:03:19,243 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014675075] [2020-12-23 01:03:19,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:03:19,256 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 01:03:19,257 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2040934706] [2020-12-23 01:03:19,257 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 [2020-12-23 01:03:21,240 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-12-23 01:03:21,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:03:21,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-23 01:03:21,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:03:21,408 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 42 proven. 22 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-23 01:03:21,409 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014675075] [2020-12-23 01:03:21,409 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 01:03:21,409 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2040934706] [2020-12-23 01:03:21,409 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 01:03:21,410 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-12-23 01:03:21,410 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337012446] [2020-12-23 01:03:21,410 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-23 01:03:21,410 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:03:21,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-23 01:03:21,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2020-12-23 01:03:21,411 INFO L87 Difference]: Start difference. First operand 96 states and 117 transitions. Second operand 13 states. [2020-12-23 01:03:22,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:03:22,168 INFO L93 Difference]: Finished difference Result 220 states and 281 transitions. [2020-12-23 01:03:22,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-12-23 01:03:22,169 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 47 [2020-12-23 01:03:22,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:03:22,170 INFO L225 Difference]: With dead ends: 220 [2020-12-23 01:03:22,171 INFO L226 Difference]: Without dead ends: 163 [2020-12-23 01:03:22,172 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 [2020-12-23 01:03:22,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2020-12-23 01:03:22,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 145. [2020-12-23 01:03:22,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-12-23 01:03:22,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 180 transitions. [2020-12-23 01:03:22,188 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 180 transitions. Word has length 47 [2020-12-23 01:03:22,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:03:22,188 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 180 transitions. [2020-12-23 01:03:22,188 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-23 01:03:22,188 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 180 transitions. [2020-12-23 01:03:22,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-12-23 01:03:22,189 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:03:22,189 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] [2020-12-23 01:03:22,403 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-12-23 01:03:22,404 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:03:22,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:03:22,405 INFO L82 PathProgramCache]: Analyzing trace with hash 704019603, now seen corresponding path program 6 times [2020-12-23 01:03:22,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:03:22,405 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754720680] [2020-12-23 01:03:22,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:03:22,415 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 01:03:22,416 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [828057063] [2020-12-23 01:03:22,416 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 [2020-12-23 01:03:22,520 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-12-23 01:03:22,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:03:22,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-23 01:03:22,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:03:22,606 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 21 proven. 24 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2020-12-23 01:03:22,607 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754720680] [2020-12-23 01:03:22,607 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 01:03:22,607 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [828057063] [2020-12-23 01:03:22,607 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 01:03:22,607 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-12-23 01:03:22,608 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47778671] [2020-12-23 01:03:22,608 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-23 01:03:22,608 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:03:22,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-23 01:03:22,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-12-23 01:03:22,609 INFO L87 Difference]: Start difference. First operand 145 states and 180 transitions. Second operand 7 states. [2020-12-23 01:03:22,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:03:22,780 INFO L93 Difference]: Finished difference Result 261 states and 326 transitions. [2020-12-23 01:03:22,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-23 01:03:22,780 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 49 [2020-12-23 01:03:22,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:03:22,781 INFO L225 Difference]: With dead ends: 261 [2020-12-23 01:03:22,781 INFO L226 Difference]: Without dead ends: 151 [2020-12-23 01:03:22,782 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 [2020-12-23 01:03:22,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2020-12-23 01:03:22,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 139. [2020-12-23 01:03:22,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-12-23 01:03:22,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 169 transitions. [2020-12-23 01:03:22,799 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 169 transitions. Word has length 49 [2020-12-23 01:03:22,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:03:22,799 INFO L481 AbstractCegarLoop]: Abstraction has 139 states and 169 transitions. [2020-12-23 01:03:22,799 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-23 01:03:22,799 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 169 transitions. [2020-12-23 01:03:22,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-12-23 01:03:22,800 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:03:22,800 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] [2020-12-23 01:03:23,015 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:03:23,016 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:03:23,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:03:23,017 INFO L82 PathProgramCache]: Analyzing trace with hash -1606181739, now seen corresponding path program 7 times [2020-12-23 01:03:23,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:03:23,017 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314690] [2020-12-23 01:03:23,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:03:23,027 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 01:03:23,028 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1793667868] [2020-12-23 01:03:23,028 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 [2020-12-23 01:03:23,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:03:23,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-23 01:03:23,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:03:23,182 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 18 proven. 33 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-12-23 01:03:23,182 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314690] [2020-12-23 01:03:23,183 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 01:03:23,183 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1793667868] [2020-12-23 01:03:23,183 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 01:03:23,183 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-12-23 01:03:23,183 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672464628] [2020-12-23 01:03:23,184 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-23 01:03:23,184 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:03:23,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-23 01:03:23,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-12-23 01:03:23,185 INFO L87 Difference]: Start difference. First operand 139 states and 169 transitions. Second operand 9 states. [2020-12-23 01:03:23,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:03:23,440 INFO L93 Difference]: Finished difference Result 265 states and 324 transitions. [2020-12-23 01:03:23,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-23 01:03:23,440 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 49 [2020-12-23 01:03:23,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:03:23,441 INFO L225 Difference]: With dead ends: 265 [2020-12-23 01:03:23,442 INFO L226 Difference]: Without dead ends: 164 [2020-12-23 01:03:23,442 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 [2020-12-23 01:03:23,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2020-12-23 01:03:23,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 144. [2020-12-23 01:03:23,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-12-23 01:03:23,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 170 transitions. [2020-12-23 01:03:23,458 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 170 transitions. Word has length 49 [2020-12-23 01:03:23,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:03:23,458 INFO L481 AbstractCegarLoop]: Abstraction has 144 states and 170 transitions. [2020-12-23 01:03:23,458 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-23 01:03:23,459 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 170 transitions. [2020-12-23 01:03:23,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-12-23 01:03:23,459 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:03:23,460 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] [2020-12-23 01:03:23,673 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-12-23 01:03:23,674 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:03:23,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:03:23,675 INFO L82 PathProgramCache]: Analyzing trace with hash 2144493023, now seen corresponding path program 8 times [2020-12-23 01:03:23,675 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:03:23,675 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223086920] [2020-12-23 01:03:23,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:03:23,685 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 01:03:23,686 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [434579375] [2020-12-23 01:03:23,686 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 [2020-12-23 01:03:23,756 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 01:03:23,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:03:23,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-23 01:03:23,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:03:23,873 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 43 proven. 25 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2020-12-23 01:03:23,874 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223086920] [2020-12-23 01:03:23,874 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 01:03:23,874 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [434579375] [2020-12-23 01:03:23,874 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 01:03:23,874 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-12-23 01:03:23,875 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944869827] [2020-12-23 01:03:23,875 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-23 01:03:23,875 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:03:23,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-23 01:03:23,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-12-23 01:03:23,876 INFO L87 Difference]: Start difference. First operand 144 states and 170 transitions. Second operand 9 states. [2020-12-23 01:03:24,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:03:24,081 INFO L93 Difference]: Finished difference Result 167 states and 197 transitions. [2020-12-23 01:03:24,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-23 01:03:24,082 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 54 [2020-12-23 01:03:24,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:03:24,083 INFO L225 Difference]: With dead ends: 167 [2020-12-23 01:03:24,083 INFO L226 Difference]: Without dead ends: 124 [2020-12-23 01:03:24,084 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 [2020-12-23 01:03:24,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-12-23 01:03:24,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 105. [2020-12-23 01:03:24,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-12-23 01:03:24,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 128 transitions. [2020-12-23 01:03:24,094 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 128 transitions. Word has length 54 [2020-12-23 01:03:24,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:03:24,095 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 128 transitions. [2020-12-23 01:03:24,095 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-23 01:03:24,095 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 128 transitions. [2020-12-23 01:03:24,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-12-23 01:03:24,096 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:03:24,096 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] [2020-12-23 01:03:24,310 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-12-23 01:03:24,311 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:03:24,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:03:24,312 INFO L82 PathProgramCache]: Analyzing trace with hash 363268227, now seen corresponding path program 9 times [2020-12-23 01:03:24,312 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:03:24,312 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655747839] [2020-12-23 01:03:24,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:03:24,324 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 01:03:24,324 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [854310936] [2020-12-23 01:03:24,324 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