/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/loops/linear_search.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-dcfa08f [2020-12-23 06:44:44,575 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-23 06:44:44,578 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-23 06:44:44,619 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-23 06:44:44,619 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-23 06:44:44,621 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-23 06:44:44,623 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-23 06:44:44,626 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-23 06:44:44,629 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-23 06:44:44,631 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-23 06:44:44,632 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-23 06:44:44,634 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-23 06:44:44,635 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-23 06:44:44,636 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-23 06:44:44,638 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-23 06:44:44,640 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-23 06:44:44,641 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-23 06:44:44,653 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-23 06:44:44,656 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-23 06:44:44,659 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-23 06:44:44,661 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-23 06:44:44,663 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-23 06:44:44,665 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-23 06:44:44,666 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-23 06:44:44,669 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-23 06:44:44,674 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-23 06:44:44,676 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-23 06:44:44,677 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-23 06:44:44,678 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-23 06:44:44,679 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-23 06:44:44,680 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-23 06:44:44,681 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-23 06:44:44,681 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-23 06:44:44,681 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-23 06:44:44,683 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-23 06:44:44,684 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-23 06:44:44,686 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 06:44:44,724 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-23 06:44:44,725 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-23 06:44:44,727 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-23 06:44:44,727 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-23 06:44:44,728 INFO L138 SettingsManager]: * Use SBE=true [2020-12-23 06:44:44,728 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-23 06:44:44,728 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-23 06:44:44,728 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-23 06:44:44,729 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-23 06:44:44,729 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-23 06:44:44,729 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-23 06:44:44,729 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-23 06:44:44,730 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-23 06:44:44,730 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-23 06:44:44,730 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-23 06:44:44,730 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-23 06:44:44,731 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-23 06:44:44,731 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 06:44:44,731 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-23 06:44:44,731 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-23 06:44:44,732 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-23 06:44:44,732 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-23 06:44:44,732 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-23 06:44:44,732 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-23 06:44:44,732 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-23 06:44:44,733 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-23 06:44:45,276 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-23 06:44:45,335 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-23 06:44:45,339 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-23 06:44:45,341 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-23 06:44:45,342 INFO L275 PluginConnector]: CDTParser initialized [2020-12-23 06:44:45,343 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loops/linear_search.c [2020-12-23 06:44:45,447 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/cbc2e617e/e16eba62e01e40fd9dcdfeec49bfcb81/FLAG14ee20a7c [2020-12-23 06:44:46,092 INFO L306 CDTParser]: Found 1 translation units. [2020-12-23 06:44:46,093 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/loops/linear_search.c [2020-12-23 06:44:46,101 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/cbc2e617e/e16eba62e01e40fd9dcdfeec49bfcb81/FLAG14ee20a7c [2020-12-23 06:44:46,466 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/cbc2e617e/e16eba62e01e40fd9dcdfeec49bfcb81 [2020-12-23 06:44:46,470 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-23 06:44:46,472 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-23 06:44:46,474 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-23 06:44:46,475 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-23 06:44:46,481 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-23 06:44:46,482 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 06:44:46" (1/1) ... [2020-12-23 06:44:46,484 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5d7d26be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:44:46, skipping insertion in model container [2020-12-23 06:44:46,484 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 06:44:46" (1/1) ... [2020-12-23 06:44:46,494 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-23 06:44:46,512 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-23 06:44:46,682 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/loops/linear_search.c[358,371] left hand side expression in assignment: lhs: VariableLHS[~j~0,] left hand side expression in assignment: lhs: VariableLHS[~SIZE~0,GLOBAL] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~a~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~a~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],BinaryExpression[ARITHMOD,IfThenElseExpression[BinaryExpression[LOGICAND,BinaryExpression[COMPLT,BinaryExpression[ARITHMOD,IdentifierExpression[~SIZE~0,GLOBAL],IntegerLiteral[4294967296]],IntegerLiteral[0]],BinaryExpression[COMPNEQ,IntegerLiteral[0],BinaryExpression[ARITHMOD,BinaryExpression[ARITHMOD,IdentifierExpression[~SIZE~0,GLOBAL],IntegerLiteral[4294967296]],IntegerLiteral[2]]]],BinaryExpression[ARITHPLUS,IntegerLiteral[1],BinaryExpression[ARITHDIV,BinaryExpression[ARITHMOD,IdentifierExpression[~SIZE~0,GLOBAL],IntegerLiteral[4294967296]],IntegerLiteral[2]]],BinaryExpression[ARITHDIV,BinaryExpression[ARITHMOD,IdentifierExpression[~SIZE~0,GLOBAL],IntegerLiteral[4294967296]],IntegerLiteral[2]]],IntegerLiteral[4294967296]]]]]] [2020-12-23 06:44:46,709 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 06:44:46,721 INFO L203 MainTranslator]: Completed pre-run [2020-12-23 06:44:46,735 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/loops/linear_search.c[358,371] left hand side expression in assignment: lhs: VariableLHS[~j~0,] left hand side expression in assignment: lhs: VariableLHS[~SIZE~0,GLOBAL] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~a~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~a~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],BinaryExpression[ARITHMOD,IfThenElseExpression[BinaryExpression[LOGICAND,BinaryExpression[COMPLT,BinaryExpression[ARITHMOD,IdentifierExpression[~SIZE~0,GLOBAL],IntegerLiteral[4294967296]],IntegerLiteral[0]],BinaryExpression[COMPNEQ,IntegerLiteral[0],BinaryExpression[ARITHMOD,BinaryExpression[ARITHMOD,IdentifierExpression[~SIZE~0,GLOBAL],IntegerLiteral[4294967296]],IntegerLiteral[2]]]],BinaryExpression[ARITHPLUS,IntegerLiteral[1],BinaryExpression[ARITHDIV,BinaryExpression[ARITHMOD,IdentifierExpression[~SIZE~0,GLOBAL],IntegerLiteral[4294967296]],IntegerLiteral[2]]],BinaryExpression[ARITHDIV,BinaryExpression[ARITHMOD,IdentifierExpression[~SIZE~0,GLOBAL],IntegerLiteral[4294967296]],IntegerLiteral[2]]],IntegerLiteral[4294967296]]]]]] [2020-12-23 06:44:46,744 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 06:44:46,764 INFO L208 MainTranslator]: Completed translation [2020-12-23 06:44:46,765 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:44:46 WrapperNode [2020-12-23 06:44:46,765 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-23 06:44:46,766 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-23 06:44:46,767 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-23 06:44:46,767 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-23 06:44:46,777 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:44:46" (1/1) ... [2020-12-23 06:44:46,785 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:44:46" (1/1) ... [2020-12-23 06:44:46,811 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-23 06:44:46,812 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-23 06:44:46,812 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-23 06:44:46,812 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-23 06:44:46,824 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:44:46" (1/1) ... [2020-12-23 06:44:46,824 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:44:46" (1/1) ... [2020-12-23 06:44:46,827 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:44:46" (1/1) ... [2020-12-23 06:44:46,827 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:44:46" (1/1) ... [2020-12-23 06:44:46,834 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:44:46" (1/1) ... [2020-12-23 06:44:46,839 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:44:46" (1/1) ... [2020-12-23 06:44:46,841 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:44:46" (1/1) ... [2020-12-23 06:44:46,844 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-23 06:44:46,846 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-23 06:44:46,846 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-23 06:44:46,846 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-23 06:44:46,847 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:44:46" (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 06:44:46,985 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-23 06:44:46,985 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-23 06:44:46,985 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-23 06:44:46,985 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-12-23 06:44:46,986 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-23 06:44:46,986 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-23 06:44:46,986 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-23 06:44:47,472 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-23 06:44:47,473 INFO L299 CfgBuilder]: Removed 9 assume(true) statements. [2020-12-23 06:44:47,475 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 06:44:47 BoogieIcfgContainer [2020-12-23 06:44:47,476 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-23 06:44:47,478 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-23 06:44:47,478 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-23 06:44:47,483 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-23 06:44:47,484 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.12 06:44:46" (1/3) ... [2020-12-23 06:44:47,485 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f2eaf77 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 06:44:47, skipping insertion in model container [2020-12-23 06:44:47,486 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:44:46" (2/3) ... [2020-12-23 06:44:47,486 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f2eaf77 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 06:44:47, skipping insertion in model container [2020-12-23 06:44:47,486 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 06:44:47" (3/3) ... [2020-12-23 06:44:47,489 INFO L111 eAbstractionObserver]: Analyzing ICFG linear_search.c [2020-12-23 06:44:47,499 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-23 06:44:47,506 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-23 06:44:47,591 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-23 06:44:47,696 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-23 06:44:47,696 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-23 06:44:47,696 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-23 06:44:47,696 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-23 06:44:47,697 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-23 06:44:47,697 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-23 06:44:47,700 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-23 06:44:47,700 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-23 06:44:47,723 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states. [2020-12-23 06:44:47,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-23 06:44:47,731 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:44:47,732 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:44:47,733 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:44:47,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:44:47,741 INFO L82 PathProgramCache]: Analyzing trace with hash 138500705, now seen corresponding path program 1 times [2020-12-23 06:44:47,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:44:47,754 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106629585] [2020-12-23 06:44:47,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:44:47,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:44:48,026 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:44:48,028 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106629585] [2020-12-23 06:44:48,030 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 06:44:48,031 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-23 06:44:48,032 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909191814] [2020-12-23 06:44:48,038 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-23 06:44:48,039 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:44:48,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-23 06:44:48,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-23 06:44:48,058 INFO L87 Difference]: Start difference. First operand 16 states. Second operand 2 states. [2020-12-23 06:44:48,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:44:48,076 INFO L93 Difference]: Finished difference Result 25 states and 32 transitions. [2020-12-23 06:44:48,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-23 06:44:48,078 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 8 [2020-12-23 06:44:48,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:44:48,092 INFO L225 Difference]: With dead ends: 25 [2020-12-23 06:44:48,092 INFO L226 Difference]: Without dead ends: 12 [2020-12-23 06:44:48,096 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 06:44:48,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2020-12-23 06:44:48,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2020-12-23 06:44:48,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-12-23 06:44:48,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 15 transitions. [2020-12-23 06:44:48,134 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 15 transitions. Word has length 8 [2020-12-23 06:44:48,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:44:48,135 INFO L481 AbstractCegarLoop]: Abstraction has 12 states and 15 transitions. [2020-12-23 06:44:48,135 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-23 06:44:48,135 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 15 transitions. [2020-12-23 06:44:48,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-23 06:44:48,136 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:44:48,136 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:44:48,136 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-23 06:44:48,136 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:44:48,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:44:48,138 INFO L82 PathProgramCache]: Analyzing trace with hash -316927884, now seen corresponding path program 1 times [2020-12-23 06:44:48,138 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:44:48,139 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428761278] [2020-12-23 06:44:48,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:44:48,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:44:48,359 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 06:44:48,361 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428761278] [2020-12-23 06:44:48,361 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 06:44:48,361 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-23 06:44:48,363 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557433130] [2020-12-23 06:44:48,365 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 06:44:48,366 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:44:48,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 06:44:48,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-23 06:44:48,370 INFO L87 Difference]: Start difference. First operand 12 states and 15 transitions. Second operand 4 states. [2020-12-23 06:44:48,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:44:48,449 INFO L93 Difference]: Finished difference Result 16 states and 18 transitions. [2020-12-23 06:44:48,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 06:44:48,452 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2020-12-23 06:44:48,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:44:48,454 INFO L225 Difference]: With dead ends: 16 [2020-12-23 06:44:48,455 INFO L226 Difference]: Without dead ends: 12 [2020-12-23 06:44:48,456 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 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 06:44:48,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2020-12-23 06:44:48,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2020-12-23 06:44:48,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-12-23 06:44:48,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 14 transitions. [2020-12-23 06:44:48,467 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 14 transitions. Word has length 10 [2020-12-23 06:44:48,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:44:48,467 INFO L481 AbstractCegarLoop]: Abstraction has 12 states and 14 transitions. [2020-12-23 06:44:48,468 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 06:44:48,469 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 14 transitions. [2020-12-23 06:44:48,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-23 06:44:48,469 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:44:48,471 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:44:48,471 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-23 06:44:48,473 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:44:48,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:44:48,476 INFO L82 PathProgramCache]: Analyzing trace with hash -316868302, now seen corresponding path program 1 times [2020-12-23 06:44:48,476 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:44:48,477 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425729730] [2020-12-23 06:44:48,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:44:48,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:44:48,686 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 06:44:48,686 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425729730] [2020-12-23 06:44:48,687 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 06:44:48,687 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-23 06:44:48,687 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274089124] [2020-12-23 06:44:48,688 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 06:44:48,688 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:44:48,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 06:44:48,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-23 06:44:48,690 INFO L87 Difference]: Start difference. First operand 12 states and 14 transitions. Second operand 4 states. [2020-12-23 06:44:48,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:44:48,739 INFO L93 Difference]: Finished difference Result 20 states and 23 transitions. [2020-12-23 06:44:48,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 06:44:48,740 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2020-12-23 06:44:48,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:44:48,741 INFO L225 Difference]: With dead ends: 20 [2020-12-23 06:44:48,741 INFO L226 Difference]: Without dead ends: 15 [2020-12-23 06:44:48,742 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-23 06:44:48,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-12-23 06:44:48,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-12-23 06:44:48,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-12-23 06:44:48,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 18 transitions. [2020-12-23 06:44:48,748 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 18 transitions. Word has length 10 [2020-12-23 06:44:48,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:44:48,748 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 18 transitions. [2020-12-23 06:44:48,748 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 06:44:48,749 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 18 transitions. [2020-12-23 06:44:48,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 06:44:48,749 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:44:48,749 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:44:48,750 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-23 06:44:48,750 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:44:48,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:44:48,751 INFO L82 PathProgramCache]: Analyzing trace with hash -1526315956, now seen corresponding path program 1 times [2020-12-23 06:44:48,751 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:44:48,752 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418732505] [2020-12-23 06:44:48,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:44:48,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:44:48,844 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:44:48,844 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418732505] [2020-12-23 06:44:48,844 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 06:44:48,845 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-23 06:44:48,845 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399442413] [2020-12-23 06:44:48,846 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 06:44:48,846 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:44:48,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 06:44:48,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-23 06:44:48,848 INFO L87 Difference]: Start difference. First operand 15 states and 18 transitions. Second operand 4 states. [2020-12-23 06:44:48,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:44:48,896 INFO L93 Difference]: Finished difference Result 33 states and 40 transitions. [2020-12-23 06:44:48,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 06:44:48,897 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2020-12-23 06:44:48,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:44:48,898 INFO L225 Difference]: With dead ends: 33 [2020-12-23 06:44:48,899 INFO L226 Difference]: Without dead ends: 24 [2020-12-23 06:44:48,900 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 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 06:44:48,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-12-23 06:44:48,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 16. [2020-12-23 06:44:48,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-12-23 06:44:48,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 19 transitions. [2020-12-23 06:44:48,905 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 19 transitions. Word has length 14 [2020-12-23 06:44:48,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:44:48,906 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 19 transitions. [2020-12-23 06:44:48,906 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 06:44:48,906 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 19 transitions. [2020-12-23 06:44:48,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 06:44:48,907 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:44:48,907 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:44:48,907 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-23 06:44:48,908 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:44:48,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:44:48,909 INFO L82 PathProgramCache]: Analyzing trace with hash 1959304714, now seen corresponding path program 1 times [2020-12-23 06:44:48,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:44:48,909 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072905531] [2020-12-23 06:44:48,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:44:48,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:44:49,093 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:44:49,094 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072905531] [2020-12-23 06:44:49,095 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [830943024] [2020-12-23 06:44:49,095 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 06:44:49,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:44:49,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-23 06:44:49,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:44:49,316 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:44:49,317 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:44:49,317 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4] total 7 [2020-12-23 06:44:49,318 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147791149] [2020-12-23 06:44:49,318 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-23 06:44:49,318 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:44:49,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-23 06:44:49,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2020-12-23 06:44:49,320 INFO L87 Difference]: Start difference. First operand 16 states and 19 transitions. Second operand 7 states. [2020-12-23 06:44:49,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:44:49,411 INFO L93 Difference]: Finished difference Result 25 states and 30 transitions. [2020-12-23 06:44:49,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 06:44:49,412 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 14 [2020-12-23 06:44:49,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:44:49,413 INFO L225 Difference]: With dead ends: 25 [2020-12-23 06:44:49,413 INFO L226 Difference]: Without dead ends: 20 [2020-12-23 06:44:49,414 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2020-12-23 06:44:49,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-12-23 06:44:49,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 19. [2020-12-23 06:44:49,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-12-23 06:44:49,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2020-12-23 06:44:49,419 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 14 [2020-12-23 06:44:49,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:44:49,420 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2020-12-23 06:44:49,420 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-23 06:44:49,420 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2020-12-23 06:44:49,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-12-23 06:44:49,421 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:44:49,421 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:44:49,634 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:44:49,635 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:44:49,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:44:49,637 INFO L82 PathProgramCache]: Analyzing trace with hash 1914944804, now seen corresponding path program 1 times [2020-12-23 06:44:49,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:44:49,638 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989099954] [2020-12-23 06:44:49,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:44:49,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:44:49,766 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:44:49,766 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989099954] [2020-12-23 06:44:49,767 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [706803934] [2020-12-23 06:44:49,767 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 06:44:49,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:44:49,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-23 06:44:49,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:44:49,905 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:44:49,905 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:44:49,905 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-12-23 06:44:49,906 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173243163] [2020-12-23 06:44:49,906 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 06:44:49,907 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:44:49,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 06:44:49,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-23 06:44:49,908 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand 6 states. [2020-12-23 06:44:49,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:44:49,986 INFO L93 Difference]: Finished difference Result 37 states and 45 transitions. [2020-12-23 06:44:49,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 06:44:49,990 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2020-12-23 06:44:49,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:44:49,994 INFO L225 Difference]: With dead ends: 37 [2020-12-23 06:44:49,995 INFO L226 Difference]: Without dead ends: 28 [2020-12-23 06:44:49,996 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-23 06:44:49,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-12-23 06:44:50,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 20. [2020-12-23 06:44:50,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-12-23 06:44:50,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2020-12-23 06:44:50,008 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 18 [2020-12-23 06:44:50,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:44:50,015 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2020-12-23 06:44:50,015 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 06:44:50,015 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2020-12-23 06:44:50,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-12-23 06:44:50,016 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:44:50,019 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:44:50,234 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:44:50,235 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:44:50,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:44:50,237 INFO L82 PathProgramCache]: Analyzing trace with hash 1105598178, now seen corresponding path program 2 times [2020-12-23 06:44:50,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:44:50,238 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074965880] [2020-12-23 06:44:50,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:44:50,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:44:50,459 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-23 06:44:50,460 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074965880] [2020-12-23 06:44:50,460 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1851979537] [2020-12-23 06:44:50,460 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:44:50,525 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-12-23 06:44:50,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:44:50,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-23 06:44:50,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:44:50,662 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-23 06:44:50,663 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:44:50,663 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-12-23 06:44:50,663 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499771255] [2020-12-23 06:44:50,664 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-23 06:44:50,664 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:44:50,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-23 06:44:50,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-12-23 06:44:50,665 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand 10 states. [2020-12-23 06:44:50,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:44:50,868 INFO L93 Difference]: Finished difference Result 38 states and 46 transitions. [2020-12-23 06:44:50,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-23 06:44:50,869 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 18 [2020-12-23 06:44:50,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:44:50,870 INFO L225 Difference]: With dead ends: 38 [2020-12-23 06:44:50,870 INFO L226 Difference]: Without dead ends: 22 [2020-12-23 06:44:50,871 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2020-12-23 06:44:50,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-12-23 06:44:50,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2020-12-23 06:44:50,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-12-23 06:44:50,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2020-12-23 06:44:50,875 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 18 [2020-12-23 06:44:50,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:44:50,875 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2020-12-23 06:44:50,875 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-23 06:44:50,876 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2020-12-23 06:44:50,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-12-23 06:44:50,876 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:44:50,876 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:44:51,089 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:44:51,090 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:44:51,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:44:51,092 INFO L82 PathProgramCache]: Analyzing trace with hash 1162856480, now seen corresponding path program 1 times [2020-12-23 06:44:51,092 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:44:51,093 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194560886] [2020-12-23 06:44:51,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:44:51,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:44:51,503 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 52 [2020-12-23 06:44:51,694 WARN L197 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 43 [2020-12-23 06:44:51,883 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:44:51,883 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194560886] [2020-12-23 06:44:51,884 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1705736721] [2020-12-23 06:44:51,884 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 06:44:51,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:44:51,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 32 conjunts are in the unsatisfiable core [2020-12-23 06:44:51,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:44:52,034 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2020-12-23 06:44:52,036 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 06:44:52,050 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 06:44:52,052 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 06:44:52,052 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:34 [2020-12-23 06:44:52,241 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:44:52,274 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 06:44:52,275 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 32 [2020-12-23 06:44:52,278 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:44:52,280 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 06:44:52,295 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 06:44:52,295 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 31 [2020-12-23 06:44:52,302 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-23 06:44:52,399 INFO L625 ElimStorePlain]: treesize reduction 1, result has 98.4 percent of original size [2020-12-23 06:44:52,400 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 2 xjuncts. [2020-12-23 06:44:52,401 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:107, output treesize:61 [2020-12-23 06:44:52,619 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 06:44:52,809 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:44:52,810 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:44:52,810 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 13 [2020-12-23 06:44:52,810 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745739180] [2020-12-23 06:44:52,811 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-23 06:44:52,811 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:44:52,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-23 06:44:52,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2020-12-23 06:44:52,812 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand 13 states. [2020-12-23 06:44:53,198 WARN L197 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 42 [2020-12-23 06:44:53,408 WARN L197 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 45 [2020-12-23 06:44:53,595 WARN L197 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 51 [2020-12-23 06:44:53,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:44:53,874 INFO L93 Difference]: Finished difference Result 38 states and 45 transitions. [2020-12-23 06:44:53,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-23 06:44:53,874 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 18 [2020-12-23 06:44:53,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:44:53,877 INFO L225 Difference]: With dead ends: 38 [2020-12-23 06:44:53,877 INFO L226 Difference]: Without dead ends: 32 [2020-12-23 06:44:53,878 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 5 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=88, Invalid=254, Unknown=0, NotChecked=0, Total=342 [2020-12-23 06:44:53,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-12-23 06:44:53,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 29. [2020-12-23 06:44:53,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-12-23 06:44:53,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 35 transitions. [2020-12-23 06:44:53,884 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 35 transitions. Word has length 18 [2020-12-23 06:44:53,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:44:53,885 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 35 transitions. [2020-12-23 06:44:53,885 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-23 06:44:53,885 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 35 transitions. [2020-12-23 06:44:53,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-12-23 06:44:53,886 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:44:53,886 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:44:54,097 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:44:54,098 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:44:54,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:44:54,099 INFO L82 PathProgramCache]: Analyzing trace with hash 319994682, now seen corresponding path program 1 times [2020-12-23 06:44:54,100 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:44:54,100 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745514354] [2020-12-23 06:44:54,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:44:54,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:44:54,229 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:44:54,231 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745514354] [2020-12-23 06:44:54,231 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [537635609] [2020-12-23 06:44:54,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:44:54,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:44:54,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-23 06:44:54,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:44:54,375 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:44:54,375 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:44:54,375 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-12-23 06:44:54,376 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574651502] [2020-12-23 06:44:54,377 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-23 06:44:54,378 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:44:54,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-23 06:44:54,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-23 06:44:54,381 INFO L87 Difference]: Start difference. First operand 29 states and 35 transitions. Second operand 7 states. [2020-12-23 06:44:54,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:44:54,472 INFO L93 Difference]: Finished difference Result 52 states and 63 transitions. [2020-12-23 06:44:54,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 06:44:54,473 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 22 [2020-12-23 06:44:54,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:44:54,474 INFO L225 Difference]: With dead ends: 52 [2020-12-23 06:44:54,474 INFO L226 Difference]: Without dead ends: 42 [2020-12-23 06:44:54,474 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-23 06:44:54,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-12-23 06:44:54,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 33. [2020-12-23 06:44:54,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-12-23 06:44:54,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 39 transitions. [2020-12-23 06:44:54,481 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 39 transitions. Word has length 22 [2020-12-23 06:44:54,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:44:54,481 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 39 transitions. [2020-12-23 06:44:54,481 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-23 06:44:54,481 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 39 transitions. [2020-12-23 06:44:54,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-12-23 06:44:54,482 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:44:54,482 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:44:54,695 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:44:54,696 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:44:54,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:44:54,697 INFO L82 PathProgramCache]: Analyzing trace with hash -1500469194, now seen corresponding path program 2 times [2020-12-23 06:44:54,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:44:54,697 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599842039] [2020-12-23 06:44:54,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:44:54,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:44:54,741 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-23 06:44:54,741 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599842039] [2020-12-23 06:44:54,741 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 06:44:54,741 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 06:44:54,742 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455124671] [2020-12-23 06:44:54,743 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 06:44:54,743 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:44:54,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 06:44:54,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 06:44:54,748 INFO L87 Difference]: Start difference. First operand 33 states and 39 transitions. Second operand 3 states. [2020-12-23 06:44:54,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:44:54,764 INFO L93 Difference]: Finished difference Result 48 states and 57 transitions. [2020-12-23 06:44:54,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 06:44:54,764 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-12-23 06:44:54,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:44:54,765 INFO L225 Difference]: With dead ends: 48 [2020-12-23 06:44:54,765 INFO L226 Difference]: Without dead ends: 27 [2020-12-23 06:44:54,766 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 06:44:54,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-12-23 06:44:54,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-12-23 06:44:54,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-12-23 06:44:54,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2020-12-23 06:44:54,771 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 22 [2020-12-23 06:44:54,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:44:54,771 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2020-12-23 06:44:54,771 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 06:44:54,771 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2020-12-23 06:44:54,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-23 06:44:54,772 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:44:54,773 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:44:54,773 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-23 06:44:54,773 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:44:54,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:44:54,773 INFO L82 PathProgramCache]: Analyzing trace with hash -1594500078, now seen corresponding path program 2 times [2020-12-23 06:44:54,774 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:44:54,774 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961141066] [2020-12-23 06:44:54,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:44:54,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:44:54,865 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 12 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:44:54,866 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961141066] [2020-12-23 06:44:54,866 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1876536421] [2020-12-23 06:44:54,866 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:44:54,951 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 06:44:54,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:44:54,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-23 06:44:54,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:44:55,032 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 12 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:44:55,032 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:44:55,033 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-12-23 06:44:55,036 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184476624] [2020-12-23 06:44:55,039 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-23 06:44:55,039 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:44:55,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-23 06:44:55,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-12-23 06:44:55,041 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 8 states. [2020-12-23 06:44:55,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:44:55,159 INFO L93 Difference]: Finished difference Result 48 states and 51 transitions. [2020-12-23 06:44:55,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-23 06:44:55,161 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 26 [2020-12-23 06:44:55,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:44:55,162 INFO L225 Difference]: With dead ends: 48 [2020-12-23 06:44:55,162 INFO L226 Difference]: Without dead ends: 38 [2020-12-23 06:44:55,163 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-12-23 06:44:55,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-12-23 06:44:55,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 29. [2020-12-23 06:44:55,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-12-23 06:44:55,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2020-12-23 06:44:55,169 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 26 [2020-12-23 06:44:55,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:44:55,169 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2020-12-23 06:44:55,169 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-23 06:44:55,169 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2020-12-23 06:44:55,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-23 06:44:55,170 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:44:55,170 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:44:55,381 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:44:55,382 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:44:55,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:44:55,383 INFO L82 PathProgramCache]: Analyzing trace with hash 1891120592, now seen corresponding path program 3 times [2020-12-23 06:44:55,383 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:44:55,384 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48410068] [2020-12-23 06:44:55,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:44:55,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:44:56,010 WARN L197 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 54 [2020-12-23 06:44:56,177 WARN L197 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 52 [2020-12-23 06:44:56,433 WARN L197 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 63 [2020-12-23 06:44:56,782 WARN L197 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 144 DAG size of output: 63 [2020-12-23 06:44:57,265 WARN L197 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 153 DAG size of output: 65 [2020-12-23 06:44:57,654 WARN L197 SmtUtils]: Spent 299.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 58 [2020-12-23 06:44:57,931 WARN L197 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 48 [2020-12-23 06:44:58,257 WARN L197 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 41 [2020-12-23 06:44:58,443 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 27 [2020-12-23 06:44:58,778 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 4 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:44:58,779 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48410068] [2020-12-23 06:44:58,779 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2100144000] [2020-12-23 06:44:58,779 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 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 06:44:59,094 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-12-23 06:44:59,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:44:59,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 43 conjunts are in the unsatisfiable core [2020-12-23 06:44:59,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:44:59,130 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2020-12-23 06:44:59,131 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 06:44:59,165 INFO L625 ElimStorePlain]: treesize reduction 4, result has 91.3 percent of original size [2020-12-23 06:44:59,166 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 06:44:59,167 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:50, output treesize:42 [2020-12-23 06:44:59,836 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 06:44:59,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 06:44:59,925 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 06:44:59,925 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 48 treesize of output 62 [2020-12-23 06:44:59,936 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:44:59,946 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:44:59,949 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 06:45:00,026 INFO L348 Elim1Store]: treesize reduction 22, result has 69.9 percent of original size [2020-12-23 06:45:00,028 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 47 treesize of output 61 [2020-12-23 06:45:00,034 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:45:00,046 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-23 06:45:00,261 WARN L197 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 38 [2020-12-23 06:45:00,263 INFO L625 ElimStorePlain]: treesize reduction 19, result has 85.6 percent of original size [2020-12-23 06:45:00,267 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 2 xjuncts. [2020-12-23 06:45:00,268 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:173, output treesize:113 [2020-12-23 06:45:00,943 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 06:45:01,182 INFO L757 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-23 06:45:01,367 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:45:01,368 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:45:01,368 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 24 [2020-12-23 06:45:01,369 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761707274] [2020-12-23 06:45:01,371 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-12-23 06:45:01,372 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:45:01,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-12-23 06:45:01,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=543, Unknown=0, NotChecked=0, Total=600 [2020-12-23 06:45:01,376 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand 25 states. [2020-12-23 06:45:02,299 WARN L197 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 42 [2020-12-23 06:45:02,553 WARN L197 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 52 [2020-12-23 06:45:02,923 WARN L197 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 49 [2020-12-23 06:45:03,228 WARN L197 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 50 [2020-12-23 06:45:03,712 WARN L197 SmtUtils]: Spent 336.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 59 [2020-12-23 06:45:04,019 WARN L197 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 48 [2020-12-23 06:45:04,318 WARN L197 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 49 [2020-12-23 06:45:04,652 WARN L197 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 41 [2020-12-23 06:45:04,945 WARN L197 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 42 [2020-12-23 06:45:05,805 WARN L197 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 36 [2020-12-23 06:45:05,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:45:05,941 INFO L93 Difference]: Finished difference Result 51 states and 54 transitions. [2020-12-23 06:45:05,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-23 06:45:05,942 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 26 [2020-12-23 06:45:05,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:45:05,943 INFO L225 Difference]: With dead ends: 51 [2020-12-23 06:45:05,943 INFO L226 Difference]: Without dead ends: 45 [2020-12-23 06:45:05,944 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 15 SyntacticMatches, 5 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 308 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=237, Invalid=1485, Unknown=0, NotChecked=0, Total=1722 [2020-12-23 06:45:05,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-12-23 06:45:05,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 37. [2020-12-23 06:45:05,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-12-23 06:45:05,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 40 transitions. [2020-12-23 06:45:05,952 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 40 transitions. Word has length 26 [2020-12-23 06:45:05,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:45:05,953 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 40 transitions. [2020-12-23 06:45:05,953 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-12-23 06:45:05,953 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 40 transitions. [2020-12-23 06:45:05,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-12-23 06:45:05,954 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:45:05,954 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:45:06,160 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:45:06,160 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:45:06,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:45:06,161 INFO L82 PathProgramCache]: Analyzing trace with hash 1412223210, now seen corresponding path program 3 times [2020-12-23 06:45:06,162 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:45:06,162 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058793134] [2020-12-23 06:45:06,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:45:06,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:45:06,334 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 15 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:45:06,334 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058793134] [2020-12-23 06:45:06,334 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [17972277] [2020-12-23 06:45:06,334 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:45:06,653 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-12-23 06:45:06,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:45:06,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-23 06:45:06,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:45:06,734 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 15 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:45:06,735 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:45:06,735 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-12-23 06:45:06,735 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337825654] [2020-12-23 06:45:06,737 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-23 06:45:06,737 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:45:06,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-23 06:45:06,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-12-23 06:45:06,739 INFO L87 Difference]: Start difference. First operand 37 states and 40 transitions. Second operand 9 states. [2020-12-23 06:45:06,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:45:06,903 INFO L93 Difference]: Finished difference Result 52 states and 57 transitions. [2020-12-23 06:45:06,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-23 06:45:06,904 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 30 [2020-12-23 06:45:06,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:45:06,906 INFO L225 Difference]: With dead ends: 52 [2020-12-23 06:45:06,906 INFO L226 Difference]: Without dead ends: 36 [2020-12-23 06:45:06,907 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-12-23 06:45:06,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-12-23 06:45:06,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2020-12-23 06:45:06,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-12-23 06:45:06,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2020-12-23 06:45:06,914 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 30 [2020-12-23 06:45:06,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:45:06,914 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2020-12-23 06:45:06,914 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-23 06:45:06,915 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2020-12-23 06:45:06,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-12-23 06:45:06,915 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:45:06,916 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:45:07,120 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-12-23 06:45:07,121 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:45:07,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:45:07,124 INFO L82 PathProgramCache]: Analyzing trace with hash -156395070, now seen corresponding path program 4 times [2020-12-23 06:45:07,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:45:07,125 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431375336] [2020-12-23 06:45:07,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:45:07,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:45:07,316 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 18 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:45:07,316 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431375336] [2020-12-23 06:45:07,317 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1469932026] [2020-12-23 06:45:07,317 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 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 06:45:07,395 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 06:45:07,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:45:07,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-23 06:45:07,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:45:07,481 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 18 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:45:07,482 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:45:07,482 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-12-23 06:45:07,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049619878] [2020-12-23 06:45:07,483 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-23 06:45:07,486 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:45:07,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-23 06:45:07,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-12-23 06:45:07,487 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand 10 states. [2020-12-23 06:45:07,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:45:07,732 INFO L93 Difference]: Finished difference Result 56 states and 59 transitions. [2020-12-23 06:45:07,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-23 06:45:07,733 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 34 [2020-12-23 06:45:07,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:45:07,734 INFO L225 Difference]: With dead ends: 56 [2020-12-23 06:45:07,734 INFO L226 Difference]: Without dead ends: 46 [2020-12-23 06:45:07,734 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-12-23 06:45:07,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-12-23 06:45:07,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 37. [2020-12-23 06:45:07,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-12-23 06:45:07,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2020-12-23 06:45:07,741 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 34 [2020-12-23 06:45:07,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:45:07,741 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2020-12-23 06:45:07,741 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-23 06:45:07,741 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2020-12-23 06:45:07,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-12-23 06:45:07,742 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:45:07,742 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:45:07,956 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:45:07,957 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:45:07,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:45:07,958 INFO L82 PathProgramCache]: Analyzing trace with hash -965741696, now seen corresponding path program 4 times [2020-12-23 06:45:07,958 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:45:07,958 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643338208] [2020-12-23 06:45:07,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:45:08,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:45:08,636 WARN L197 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 50 [2020-12-23 06:45:09,125 WARN L197 SmtUtils]: Spent 290.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 63 [2020-12-23 06:45:09,453 WARN L197 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 63 [2020-12-23 06:45:09,969 WARN L197 SmtUtils]: Spent 434.00 ms on a formula simplification. DAG size of input: 165 DAG size of output: 73 [2020-12-23 06:45:10,478 WARN L197 SmtUtils]: Spent 320.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 65 [2020-12-23 06:45:10,845 WARN L197 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 51 [2020-12-23 06:45:11,350 WARN L197 SmtUtils]: Spent 374.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 60 [2020-12-23 06:45:11,840 WARN L197 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 50 [2020-12-23 06:45:12,208 WARN L197 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 43 [2020-12-23 06:45:12,462 WARN L197 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 38 [2020-12-23 06:45:12,689 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 6 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:45:12,689 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643338208] [2020-12-23 06:45:12,689 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2053447353] [2020-12-23 06:45:12,690 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:45:12,843 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 06:45:12,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:45:12,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 51 conjunts are in the unsatisfiable core [2020-12-23 06:45:12,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:45:12,867 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2020-12-23 06:45:12,868 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 06:45:12,881 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 06:45:12,882 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 06:45:12,883 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:29 [2020-12-23 06:45:14,216 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-23 06:45:14,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 06:45:14,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 06:45:14,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 06:45:14,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 06:45:14,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 06:45:14,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 06:45:14,315 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 06:45:14,315 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 67 treesize of output 109 [2020-12-23 06:45:14,320 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:45:14,327 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:45:14,329 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:45:14,331 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 06:45:14,605 WARN L197 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 60 [2020-12-23 06:45:14,606 INFO L348 Elim1Store]: treesize reduction 34, result has 82.4 percent of original size [2020-12-23 06:45:14,607 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 68 treesize of output 178 [2020-12-23 06:45:14,619 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-23 06:45:14,620 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 06:45:14,621 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:45:14,627 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-23 06:45:14,628 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 06:45:14,629 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:45:14,632 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-23 06:45:14,633 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-23 06:45:14,635 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-23 06:45:14,636 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-23 06:45:14,637 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 06:45:14,637 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:45:14,638 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:45:14,641 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-23 06:45:14,642 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 06:45:14,643 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:45:14,645 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 06:45:14,646 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 06:45:14,647 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:45:14,648 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:45:14,651 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 06:45:14,652 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:45:14,655 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 06:45:14,656 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2020-12-23 06:45:14,657 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-23 06:45:14,658 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 06:45:14,659 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 06:45:14,660 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:45:14,662 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 06:45:14,663 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:45:14,666 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 06:45:14,667 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:45:14,669 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 06:45:14,670 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:45:14,673 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 06:45:14,674 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:45:14,675 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:45:14,682 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:45:14,684 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 06:45:14,686 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:45:14,688 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 06:45:14,688 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:45:14,695 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-23 06:45:14,924 WARN L197 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 34 [2020-12-23 06:45:14,933 INFO L625 ElimStorePlain]: treesize reduction 424, result has 22.2 percent of original size [2020-12-23 06:45:14,934 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 2 xjuncts. [2020-12-23 06:45:14,934 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:155, output treesize:121 [2020-12-23 06:45:15,736 INFO L757 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-23 06:45:16,076 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:45:16,076 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:45:16,077 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2020-12-23 06:45:16,077 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775656819] [2020-12-23 06:45:16,077 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-12-23 06:45:16,078 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:45:16,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-12-23 06:45:16,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=549, Unknown=0, NotChecked=0, Total=600 [2020-12-23 06:45:16,079 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand 25 states. [2020-12-23 06:45:16,531 WARN L197 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 66 [2020-12-23 06:45:16,823 WARN L197 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 67 [2020-12-23 06:45:17,281 WARN L197 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 73 [2020-12-23 06:45:17,803 WARN L197 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 74 [2020-12-23 06:45:18,354 WARN L197 SmtUtils]: Spent 321.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 84 [2020-12-23 06:45:18,864 WARN L197 SmtUtils]: Spent 291.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 81 [2020-12-23 06:45:19,407 WARN L197 SmtUtils]: Spent 307.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 82 [2020-12-23 06:45:20,160 WARN L197 SmtUtils]: Spent 364.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 92 [2020-12-23 06:45:20,701 WARN L197 SmtUtils]: Spent 318.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 75 [2020-12-23 06:45:21,134 WARN L197 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 76 [2020-12-23 06:45:21,880 WARN L197 SmtUtils]: Spent 555.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 79 [2020-12-23 06:45:22,388 WARN L197 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 71 [2020-12-23 06:45:22,951 WARN L197 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 72 [2020-12-23 06:45:23,849 WARN L197 SmtUtils]: Spent 608.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 81 [2020-12-23 06:45:24,765 WARN L197 SmtUtils]: Spent 646.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 62 [2020-12-23 06:45:25,738 WARN L197 SmtUtils]: Spent 726.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 63 [2020-12-23 06:45:26,483 WARN L197 SmtUtils]: Spent 324.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 53 [2020-12-23 06:45:27,130 WARN L197 SmtUtils]: Spent 389.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 54 [2020-12-23 06:45:27,800 WARN L197 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 60 [2020-12-23 06:45:28,056 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-12-23 06:45:28,574 WARN L197 SmtUtils]: Spent 329.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 78 [2020-12-23 06:45:29,011 WARN L197 SmtUtils]: Spent 288.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 61 [2020-12-23 06:45:29,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:45:29,978 INFO L93 Difference]: Finished difference Result 62 states and 67 transitions. [2020-12-23 06:45:29,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-12-23 06:45:29,980 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 34 [2020-12-23 06:45:29,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:45:29,980 INFO L225 Difference]: With dead ends: 62 [2020-12-23 06:45:29,980 INFO L226 Difference]: Without dead ends: 56 [2020-12-23 06:45:29,982 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 18 SyntacticMatches, 11 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 421 ImplicationChecksByTransitivity, 17.9s TimeCoverageRelationStatistics Valid=283, Invalid=2167, Unknown=0, NotChecked=0, Total=2450 [2020-12-23 06:45:29,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-12-23 06:45:30,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 49. [2020-12-23 06:45:30,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-12-23 06:45:30,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 53 transitions. [2020-12-23 06:45:30,005 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 53 transitions. Word has length 34 [2020-12-23 06:45:30,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:45:30,005 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 53 transitions. [2020-12-23 06:45:30,005 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-12-23 06:45:30,006 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 53 transitions. [2020-12-23 06:45:30,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-12-23 06:45:30,007 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:45:30,013 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:45:30,227 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-12-23 06:45:30,228 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:45:30,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:45:30,229 INFO L82 PathProgramCache]: Analyzing trace with hash 1735276186, now seen corresponding path program 5 times [2020-12-23 06:45:30,230 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:45:30,230 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510618191] [2020-12-23 06:45:30,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:45:30,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:45:30,423 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 21 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:45:30,423 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510618191] [2020-12-23 06:45:30,424 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1861455172] [2020-12-23 06:45:30,424 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 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 06:45:30,877 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-12-23 06:45:30,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:45:30,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 26 conjunts are in the unsatisfiable core [2020-12-23 06:45:30,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:45:31,172 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-23 06:45:31,297 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 21 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:45:31,297 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:45:31,297 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 15 [2020-12-23 06:45:31,297 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007204836] [2020-12-23 06:45:31,298 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-23 06:45:31,298 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:45:31,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-23 06:45:31,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2020-12-23 06:45:31,299 INFO L87 Difference]: Start difference. First operand 49 states and 53 transitions. Second operand 15 states. [2020-12-23 06:45:31,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:45:31,769 INFO L93 Difference]: Finished difference Result 66 states and 73 transitions. [2020-12-23 06:45:31,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-23 06:45:31,771 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 38 [2020-12-23 06:45:31,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:45:31,771 INFO L225 Difference]: With dead ends: 66 [2020-12-23 06:45:31,771 INFO L226 Difference]: Without dead ends: 50 [2020-12-23 06:45:31,772 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 28 SyntacticMatches, 6 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2020-12-23 06:45:31,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-12-23 06:45:31,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2020-12-23 06:45:31,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-12-23 06:45:31,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 52 transitions. [2020-12-23 06:45:31,782 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 52 transitions. Word has length 38 [2020-12-23 06:45:31,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:45:31,782 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 52 transitions. [2020-12-23 06:45:31,783 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-23 06:45:31,783 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 52 transitions. [2020-12-23 06:45:31,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-12-23 06:45:31,784 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:45:31,784 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:45:31,988 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-12-23 06:45:31,989 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:45:31,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:45:31,990 INFO L82 PathProgramCache]: Analyzing trace with hash 442804082, now seen corresponding path program 6 times [2020-12-23 06:45:31,991 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:45:31,991 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490003913] [2020-12-23 06:45:31,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:45:32,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:45:32,247 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 24 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:45:32,248 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490003913] [2020-12-23 06:45:32,248 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1764349897] [2020-12-23 06:45:32,248 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 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 06:45:32,974 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-12-23 06:45:32,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:45:32,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-23 06:45:32,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:45:33,109 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 24 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:45:33,109 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:45:33,110 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-12-23 06:45:33,110 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979763710] [2020-12-23 06:45:33,110 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-23 06:45:33,110 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:45:33,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-23 06:45:33,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-12-23 06:45:33,111 INFO L87 Difference]: Start difference. First operand 49 states and 52 transitions. Second operand 12 states. [2020-12-23 06:45:33,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:45:33,534 INFO L93 Difference]: Finished difference Result 64 states and 69 transitions. [2020-12-23 06:45:33,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-23 06:45:33,536 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 42 [2020-12-23 06:45:33,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:45:33,536 INFO L225 Difference]: With dead ends: 64 [2020-12-23 06:45:33,536 INFO L226 Difference]: Without dead ends: 48 [2020-12-23 06:45:33,537 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-12-23 06:45:33,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-12-23 06:45:33,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2020-12-23 06:45:33,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-12-23 06:45:33,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 48 transitions. [2020-12-23 06:45:33,546 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 48 transitions. Word has length 42 [2020-12-23 06:45:33,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:45:33,546 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 48 transitions. [2020-12-23 06:45:33,546 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-23 06:45:33,546 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 48 transitions. [2020-12-23 06:45:33,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-12-23 06:45:33,547 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:45:33,547 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:45:33,750 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-12-23 06:45:33,752 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:45:33,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:45:33,753 INFO L82 PathProgramCache]: Analyzing trace with hash -1735988150, now seen corresponding path program 7 times [2020-12-23 06:45:33,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:45:33,753 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458113719] [2020-12-23 06:45:33,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:45:33,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:45:33,994 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 27 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:45:33,995 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458113719] [2020-12-23 06:45:33,995 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1250956260] [2020-12-23 06:45:33,995 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 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 06:45:34,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:45:34,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 22 conjunts are in the unsatisfiable core [2020-12-23 06:45:34,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:45:34,201 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 27 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:45:34,201 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:45:34,201 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-12-23 06:45:34,202 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848504223] [2020-12-23 06:45:34,202 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-23 06:45:34,202 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:45:34,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-23 06:45:34,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-12-23 06:45:34,203 INFO L87 Difference]: Start difference. First operand 47 states and 48 transitions. Second operand 13 states. [2020-12-23 06:45:34,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:45:34,743 INFO L93 Difference]: Finished difference Result 68 states and 71 transitions. [2020-12-23 06:45:34,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-23 06:45:34,744 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 46 [2020-12-23 06:45:34,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:45:34,745 INFO L225 Difference]: With dead ends: 68 [2020-12-23 06:45:34,745 INFO L226 Difference]: Without dead ends: 58 [2020-12-23 06:45:34,745 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-12-23 06:45:34,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-12-23 06:45:34,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 49. [2020-12-23 06:45:34,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-12-23 06:45:34,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 50 transitions. [2020-12-23 06:45:34,759 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 50 transitions. Word has length 46 [2020-12-23 06:45:34,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:45:34,760 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 50 transitions. [2020-12-23 06:45:34,760 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-23 06:45:34,760 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 50 transitions. [2020-12-23 06:45:34,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-12-23 06:45:34,761 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:45:34,761 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:45:34,966 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-23 06:45:34,967 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:45:34,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:45:34,968 INFO L82 PathProgramCache]: Analyzing trace with hash 1749632520, now seen corresponding path program 5 times [2020-12-23 06:45:34,968 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:45:34,969 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430842875] [2020-12-23 06:45:34,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:45:35,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:45:35,828 WARN L197 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 54 [2020-12-23 06:45:36,333 WARN L197 SmtUtils]: Spent 333.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 60 [2020-12-23 06:45:36,706 WARN L197 SmtUtils]: Spent 324.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 59 [2020-12-23 06:45:37,196 WARN L197 SmtUtils]: Spent 432.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 60 [2020-12-23 06:45:37,744 WARN L197 SmtUtils]: Spent 437.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 73 [2020-12-23 06:45:38,485 WARN L197 SmtUtils]: Spent 467.00 ms on a formula simplification. DAG size of input: 151 DAG size of output: 65 [2020-12-23 06:45:38,944 WARN L197 SmtUtils]: Spent 353.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 47 [2020-12-23 06:45:39,391 WARN L197 SmtUtils]: Spent 334.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 46 [2020-12-23 06:45:39,847 WARN L197 SmtUtils]: Spent 286.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 47 [2020-12-23 06:45:40,537 WARN L197 SmtUtils]: Spent 523.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 52 [2020-12-23 06:45:41,139 WARN L197 SmtUtils]: Spent 281.00 ms on a formula simplification. DAG size of input: 148 DAG size of output: 53 [2020-12-23 06:45:41,595 WARN L197 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 46 [2020-12-23 06:45:42,130 WARN L197 SmtUtils]: Spent 322.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 58 [2020-12-23 06:45:42,473 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 9 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:45:42,473 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430842875] [2020-12-23 06:45:42,473 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1630680748] [2020-12-23 06:45:42,473 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 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 06:45:43,260 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-12-23 06:45:43,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:45:43,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 66 conjunts are in the unsatisfiable core [2020-12-23 06:45:43,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:45:43,292 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2020-12-23 06:45:43,293 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 06:45:43,312 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 06:45:43,313 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 06:45:43,313 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:34 [2020-12-23 06:45:44,659 WARN L197 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 46 [2020-12-23 06:45:45,834 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-23 06:45:45,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 06:45:45,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 06:45:45,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 06:45:45,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 06:45:45,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 06:45:45,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 06:45:45,982 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 06:45:45,983 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 62 treesize of output 104 [2020-12-23 06:45:45,987 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:45:45,990 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:45:45,993 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:45:45,998 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:45:46,001 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 06:45:46,278 WARN L197 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 53 [2020-12-23 06:45:46,279 INFO L348 Elim1Store]: treesize reduction 36, result has 78.7 percent of original size [2020-12-23 06:45:46,280 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 61 treesize of output 151 [2020-12-23 06:45:46,283 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 06:45:46,284 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:45:46,286 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 06:45:46,287 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:45:46,289 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 06:45:46,290 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:45:46,293 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-23 06:45:46,585 WARN L197 SmtUtils]: Spent 292.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 34 [2020-12-23 06:45:46,587 INFO L625 ElimStorePlain]: treesize reduction 35, result has 79.2 percent of original size [2020-12-23 06:45:46,589 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 2 xjuncts. [2020-12-23 06:45:46,589 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:177, output treesize:133 [2020-12-23 06:45:46,900 WARN L197 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2020-12-23 06:45:48,249 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 06:45:48,580 INFO L757 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-23 06:45:48,940 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:45:48,941 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:45:48,941 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 20] total 35 [2020-12-23 06:45:48,941 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58364675] [2020-12-23 06:45:48,943 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-12-23 06:45:48,943 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:45:48,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-12-23 06:45:48,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=1115, Unknown=0, NotChecked=0, Total=1190 [2020-12-23 06:45:48,946 INFO L87 Difference]: Start difference. First operand 49 states and 50 transitions. Second operand 35 states. [2020-12-23 06:45:49,373 WARN L197 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 58 [2020-12-23 06:45:49,710 WARN L197 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 59 [2020-12-23 06:45:50,122 WARN L197 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 60 [2020-12-23 06:45:50,577 WARN L197 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 61 [2020-12-23 06:45:51,004 WARN L197 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 71 [2020-12-23 06:45:51,476 WARN L197 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 68 [2020-12-23 06:45:51,972 WARN L197 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 69 [2020-12-23 06:45:52,475 WARN L197 SmtUtils]: Spent 299.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 79 [2020-12-23 06:45:52,960 WARN L197 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 76 [2020-12-23 06:45:53,551 WARN L197 SmtUtils]: Spent 294.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 77 [2020-12-23 06:45:54,077 WARN L197 SmtUtils]: Spent 308.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 87 [2020-12-23 06:45:54,676 WARN L197 SmtUtils]: Spent 294.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 78 [2020-12-23 06:45:55,289 WARN L197 SmtUtils]: Spent 309.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 79 [2020-12-23 06:45:56,189 WARN L197 SmtUtils]: Spent 640.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 98 [2020-12-23 06:45:56,872 WARN L197 SmtUtils]: Spent 366.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 60 [2020-12-23 06:45:57,636 WARN L197 SmtUtils]: Spent 394.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 61 [2020-12-23 06:45:58,363 WARN L197 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 44 [2020-12-23 06:45:58,822 WARN L197 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 45 [2020-12-23 06:45:59,337 WARN L197 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 44 [2020-12-23 06:45:59,823 WARN L197 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 45 [2020-12-23 06:46:00,337 WARN L197 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 44 [2020-12-23 06:46:00,803 WARN L197 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 45 [2020-12-23 06:46:01,370 WARN L197 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 47 [2020-12-23 06:46:01,902 WARN L197 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 48 [2020-12-23 06:46:02,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:46:02,330 INFO L93 Difference]: Finished difference Result 58 states and 59 transitions. [2020-12-23 06:46:02,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-12-23 06:46:02,331 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 46 [2020-12-23 06:46:02,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:46:02,331 INFO L225 Difference]: With dead ends: 58 [2020-12-23 06:46:02,331 INFO L226 Difference]: Without dead ends: 52 [2020-12-23 06:46:02,333 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 22 SyntacticMatches, 12 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 533 ImplicationChecksByTransitivity, 21.2s TimeCoverageRelationStatistics Valid=247, Invalid=3293, Unknown=0, NotChecked=0, Total=3540 [2020-12-23 06:46:02,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-12-23 06:46:02,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2020-12-23 06:46:02,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-12-23 06:46:02,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2020-12-23 06:46:02,342 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 46 [2020-12-23 06:46:02,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:46:02,342 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2020-12-23 06:46:02,342 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-12-23 06:46:02,342 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2020-12-23 06:46:02,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-12-23 06:46:02,343 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:46:02,343 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:46:02,547 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:46:02,548 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:46:02,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:46:02,549 INFO L82 PathProgramCache]: Analyzing trace with hash -3472094, now seen corresponding path program 8 times [2020-12-23 06:46:02,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:46:02,549 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452520092] [2020-12-23 06:46:02,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:46:02,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:46:02,868 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 30 proven. 180 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:46:02,869 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452520092] [2020-12-23 06:46:02,869 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [741046678] [2020-12-23 06:46:02,869 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 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 06:46:02,947 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 06:46:02,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:46:02,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 24 conjunts are in the unsatisfiable core [2020-12-23 06:46:02,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:46:03,085 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 30 proven. 180 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:46:03,085 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:46:03,085 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-12-23 06:46:03,085 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587497985] [2020-12-23 06:46:03,085 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-23 06:46:03,086 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:46:03,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-23 06:46:03,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2020-12-23 06:46:03,086 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand 14 states. [2020-12-23 06:46:03,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:46:03,648 INFO L93 Difference]: Finished difference Result 72 states and 75 transitions. [2020-12-23 06:46:03,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-23 06:46:03,649 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 50 [2020-12-23 06:46:03,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:46:03,650 INFO L225 Difference]: With dead ends: 72 [2020-12-23 06:46:03,650 INFO L226 Difference]: Without dead ends: 62 [2020-12-23 06:46:03,651 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2020-12-23 06:46:03,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-12-23 06:46:03,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 53. [2020-12-23 06:46:03,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-12-23 06:46:03,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2020-12-23 06:46:03,660 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 50 [2020-12-23 06:46:03,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:46:03,660 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2020-12-23 06:46:03,660 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-23 06:46:03,660 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2020-12-23 06:46:03,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-12-23 06:46:03,661 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:46:03,661 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:46:03,869 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:46:03,870 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:46:03,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:46:03,870 INFO L82 PathProgramCache]: Analyzing trace with hash -812818720, now seen corresponding path program 6 times [2020-12-23 06:46:03,871 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:46:03,871 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092859695] [2020-12-23 06:46:03,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:46:03,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:46:04,666 WARN L197 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 51 [2020-12-23 06:46:05,197 WARN L197 SmtUtils]: Spent 370.00 ms on a formula simplification. DAG size of input: 148 DAG size of output: 62 [2020-12-23 06:46:05,571 WARN L197 SmtUtils]: Spent 321.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 62 [2020-12-23 06:46:06,033 WARN L197 SmtUtils]: Spent 383.00 ms on a formula simplification. DAG size of input: 151 DAG size of output: 69 [2020-12-23 06:46:06,442 WARN L197 SmtUtils]: Spent 325.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 68 [2020-12-23 06:46:07,129 WARN L197 SmtUtils]: Spent 580.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 73 [2020-12-23 06:46:08,073 WARN L197 SmtUtils]: Spent 630.00 ms on a formula simplification. DAG size of input: 162 DAG size of output: 88 [2020-12-23 06:46:08,882 WARN L197 SmtUtils]: Spent 606.00 ms on a formula simplification. DAG size of input: 148 DAG size of output: 74 [2020-12-23 06:46:09,510 WARN L197 SmtUtils]: Spent 368.00 ms on a formula simplification. DAG size of input: 142 DAG size of output: 56 [2020-12-23 06:46:10,221 WARN L197 SmtUtils]: Spent 416.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 55 [2020-12-23 06:46:11,063 WARN L197 SmtUtils]: Spent 451.00 ms on a formula simplification. DAG size of input: 144 DAG size of output: 56 [2020-12-23 06:46:11,620 WARN L197 SmtUtils]: Spent 369.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 59 [2020-12-23 06:46:12,388 WARN L197 SmtUtils]: Spent 313.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 55 [2020-12-23 06:46:12,863 WARN L197 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 38 [2020-12-23 06:46:13,202 WARN L197 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 21 [2020-12-23 06:46:13,541 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 10 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:46:13,542 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092859695] [2020-12-23 06:46:13,542 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1452252905] [2020-12-23 06:46:13,542 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:46:15,096 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2020-12-23 06:46:15,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:46:15,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 74 conjunts are in the unsatisfiable core [2020-12-23 06:46:15,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:46:15,243 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2020-12-23 06:46:15,244 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 06:46:15,264 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 06:46:15,265 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 06:46:15,265 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:43, output treesize:39 [2020-12-23 06:46:16,175 WARN L197 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2020-12-23 06:46:17,236 WARN L197 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 46 [2020-12-23 06:46:19,137 WARN L197 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 53 [2020-12-23 06:46:19,145 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-23 06:46:19,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 06:46:19,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 06:46:19,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 06:46:19,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 06:46:19,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 06:46:19,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 06:46:19,436 WARN L197 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-12-23 06:46:19,437 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 06:46:19,438 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 80 treesize of output 122 [2020-12-23 06:46:19,442 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:46:19,444 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:46:19,446 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:46:19,447 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:46:19,449 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 06:46:19,868 WARN L197 SmtUtils]: Spent 411.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 51 [2020-12-23 06:46:19,869 INFO L348 Elim1Store]: treesize reduction 138, result has 42.7 percent of original size [2020-12-23 06:46:19,869 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 79 treesize of output 121 [2020-12-23 06:46:19,873 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:46:19,876 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:46:19,877 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:46:19,880 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-23 06:46:20,490 WARN L197 SmtUtils]: Spent 609.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 44 [2020-12-23 06:46:20,491 INFO L625 ElimStorePlain]: treesize reduction 1, result has 99.4 percent of original size [2020-12-23 06:46:20,492 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 2 xjuncts. [2020-12-23 06:46:20,493 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:207, output treesize:173 [2020-12-23 06:46:21,488 WARN L197 SmtUtils]: Spent 324.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-12-23 06:46:23,650 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 10 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:46:23,650 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:46:23,651 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 21] total 38 [2020-12-23 06:46:23,651 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574857360] [2020-12-23 06:46:23,651 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-12-23 06:46:23,651 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:46:23,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-12-23 06:46:23,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=1381, Unknown=0, NotChecked=0, Total=1482 [2020-12-23 06:46:23,652 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand 39 states. [2020-12-23 06:46:24,299 WARN L197 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 32 [2020-12-23 06:46:24,688 WARN L197 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 34 [2020-12-23 06:46:25,045 WARN L197 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 35 [2020-12-23 06:46:25,416 WARN L197 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 60 [2020-12-23 06:46:25,976 WARN L197 SmtUtils]: Spent 285.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 69 [2020-12-23 06:46:26,494 WARN L197 SmtUtils]: Spent 293.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 71 [2020-12-23 06:46:26,966 WARN L197 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 60 [2020-12-23 06:46:27,611 WARN L197 SmtUtils]: Spent 349.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 68 [2020-12-23 06:46:28,221 WARN L197 SmtUtils]: Spent 319.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 71 [2020-12-23 06:46:28,904 WARN L197 SmtUtils]: Spent 313.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 68 [2020-12-23 06:46:29,500 WARN L197 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 69 [2020-12-23 06:46:30,236 WARN L197 SmtUtils]: Spent 455.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 79 [2020-12-23 06:46:31,823 WARN L197 SmtUtils]: Spent 893.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 78 [2020-12-23 06:46:33,423 WARN L197 SmtUtils]: Spent 703.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 85 [2020-12-23 06:46:35,793 WARN L197 SmtUtils]: Spent 1.67 s on a formula simplification. DAG size of input: 148 DAG size of output: 92 [2020-12-23 06:46:36,770 WARN L197 SmtUtils]: Spent 451.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 77 [2020-12-23 06:46:37,610 WARN L197 SmtUtils]: Spent 429.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 78 [2020-12-23 06:46:38,638 WARN L197 SmtUtils]: Spent 449.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 76 [2020-12-23 06:46:39,529 WARN L197 SmtUtils]: Spent 482.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 77 [2020-12-23 06:46:40,561 WARN L197 SmtUtils]: Spent 432.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 76 [2020-12-23 06:46:41,467 WARN L197 SmtUtils]: Spent 458.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 77 [2020-12-23 06:46:42,421 WARN L197 SmtUtils]: Spent 297.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 39 [2020-12-23 06:46:43,207 WARN L197 SmtUtils]: Spent 429.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 51 [2020-12-23 06:46:43,867 WARN L197 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 39 [2020-12-23 06:46:44,498 WARN L197 SmtUtils]: Spent 324.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 44 [2020-12-23 06:46:45,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:46:45,237 INFO L93 Difference]: Finished difference Result 66 states and 69 transitions. [2020-12-23 06:46:45,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-12-23 06:46:45,239 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 50 [2020-12-23 06:46:45,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:46:45,239 INFO L225 Difference]: With dead ends: 66 [2020-12-23 06:46:45,239 INFO L226 Difference]: Without dead ends: 60 [2020-12-23 06:46:45,241 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 27 SyntacticMatches, 9 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 781 ImplicationChecksByTransitivity, 31.4s TimeCoverageRelationStatistics Valid=366, Invalid=4056, Unknown=0, NotChecked=0, Total=4422 [2020-12-23 06:46:45,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-12-23 06:46:45,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2020-12-23 06:46:45,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-12-23 06:46:45,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 61 transitions. [2020-12-23 06:46:45,250 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 61 transitions. Word has length 50 [2020-12-23 06:46:45,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:46:45,250 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 61 transitions. [2020-12-23 06:46:45,250 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-12-23 06:46:45,250 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 61 transitions. [2020-12-23 06:46:45,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-12-23 06:46:45,251 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:46:45,251 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:46:45,455 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:46:45,456 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:46:45,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:46:45,457 INFO L82 PathProgramCache]: Analyzing trace with hash -2094599686, now seen corresponding path program 9 times [2020-12-23 06:46:45,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:46:45,458 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353426507] [2020-12-23 06:46:45,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:46:45,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:46:45,838 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 33 proven. 220 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:46:45,838 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353426507] [2020-12-23 06:46:45,838 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [149267986] [2020-12-23 06:46:45,839 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 [2020-12-23 06:46:46,634 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2020-12-23 06:46:46,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:46:46,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 27 conjunts are in the unsatisfiable core [2020-12-23 06:46:46,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:46:46,821 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 33 proven. 220 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:46:46,821 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:46:46,821 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-12-23 06:46:46,822 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457269935] [2020-12-23 06:46:46,822 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-23 06:46:46,822 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:46:46,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-23 06:46:46,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2020-12-23 06:46:46,823 INFO L87 Difference]: Start difference. First operand 59 states and 61 transitions. Second operand 15 states. [2020-12-23 06:46:47,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:46:47,788 INFO L93 Difference]: Finished difference Result 70 states and 73 transitions. [2020-12-23 06:46:47,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-23 06:46:47,793 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 54 [2020-12-23 06:46:47,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:46:47,793 INFO L225 Difference]: With dead ends: 70 [2020-12-23 06:46:47,793 INFO L226 Difference]: Without dead ends: 60 [2020-12-23 06:46:47,794 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 52 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2020-12-23 06:46:47,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-12-23 06:46:47,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2020-12-23 06:46:47,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-12-23 06:46:47,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 60 transitions. [2020-12-23 06:46:47,802 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 60 transitions. Word has length 54 [2020-12-23 06:46:47,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:46:47,802 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 60 transitions. [2020-12-23 06:46:47,802 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-23 06:46:47,802 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 60 transitions. [2020-12-23 06:46:47,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-12-23 06:46:47,803 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:46:47,803 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:46:48,003 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-12-23 06:46:48,004 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:46:48,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:46:48,005 INFO L82 PathProgramCache]: Analyzing trace with hash -359615790, now seen corresponding path program 10 times [2020-12-23 06:46:48,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:46:48,005 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094984915] [2020-12-23 06:46:48,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:46:48,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:46:48,502 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 36 proven. 264 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:46:48,502 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094984915] [2020-12-23 06:46:48,503 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1515084694] [2020-12-23 06:46:48,503 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 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:46:48,621 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 06:46:48,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:46:48,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 28 conjunts are in the unsatisfiable core [2020-12-23 06:46:48,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:46:48,848 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 36 proven. 264 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:46:48,849 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:46:48,849 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-12-23 06:46:48,849 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896274737] [2020-12-23 06:46:48,849 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-23 06:46:48,849 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:46:48,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-23 06:46:48,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2020-12-23 06:46:48,850 INFO L87 Difference]: Start difference. First operand 59 states and 60 transitions. Second operand 16 states. [2020-12-23 06:46:49,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:46:49,986 INFO L93 Difference]: Finished difference Result 80 states and 83 transitions. [2020-12-23 06:46:49,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-23 06:46:49,988 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 58 [2020-12-23 06:46:49,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:46:49,988 INFO L225 Difference]: With dead ends: 80 [2020-12-23 06:46:49,989 INFO L226 Difference]: Without dead ends: 70 [2020-12-23 06:46:49,989 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2020-12-23 06:46:49,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-12-23 06:46:49,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 61. [2020-12-23 06:46:49,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-12-23 06:46:49,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 62 transitions. [2020-12-23 06:46:49,999 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 62 transitions. Word has length 58 [2020-12-23 06:46:49,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:46:49,999 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 62 transitions. [2020-12-23 06:46:49,999 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-23 06:46:49,999 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 62 transitions. [2020-12-23 06:46:50,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-12-23 06:46:50,000 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:46:50,000 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:46:50,213 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-12-23 06:46:50,214 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:46:50,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:46:50,215 INFO L82 PathProgramCache]: Analyzing trace with hash -1168962416, now seen corresponding path program 7 times [2020-12-23 06:46:50,215 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:46:50,215 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412543785] [2020-12-23 06:46:50,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:46:50,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:46:50,911 WARN L197 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 50 [2020-12-23 06:46:51,249 WARN L197 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 57 [2020-12-23 06:46:51,589 WARN L197 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 54 [2020-12-23 06:46:51,926 WARN L197 SmtUtils]: Spent 284.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 64 [2020-12-23 06:46:52,244 WARN L197 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 64 [2020-12-23 06:46:52,582 WARN L197 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 67 [2020-12-23 06:46:52,910 WARN L197 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 66 [2020-12-23 06:46:53,249 WARN L197 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 67 [2020-12-23 06:46:53,774 WARN L197 SmtUtils]: Spent 394.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 72 [2020-12-23 06:46:54,462 WARN L197 SmtUtils]: Spent 379.00 ms on a formula simplification. DAG size of input: 148 DAG size of output: 74 [2020-12-23 06:46:54,985 WARN L197 SmtUtils]: Spent 370.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 67 [2020-12-23 06:46:55,335 WARN L197 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 56 [2020-12-23 06:46:55,719 WARN L197 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 55 [2020-12-23 06:46:56,083 WARN L197 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 56 [2020-12-23 06:46:56,482 WARN L197 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 56 [2020-12-23 06:46:57,033 WARN L197 SmtUtils]: Spent 393.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 55 [2020-12-23 06:46:57,650 WARN L197 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 50 [2020-12-23 06:46:58,022 WARN L197 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 30 [2020-12-23 06:46:58,405 WARN L197 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 21 [2020-12-23 06:46:58,788 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 12 proven. 288 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:46:58,788 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412543785] [2020-12-23 06:46:58,788 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1419369142] [2020-12-23 06:46:58,788 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 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:46:59,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:46:59,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 87 conjunts are in the unsatisfiable core [2020-12-23 06:46:59,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:46:59,336 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2020-12-23 06:46:59,338 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 06:46:59,361 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 06:46:59,363 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 06:46:59,363 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:34 [2020-12-23 06:47:02,275 WARN L197 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2020-12-23 06:47:03,168 WARN L197 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-12-23 06:47:03,659 WARN L197 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 67 [2020-12-23 06:47:04,796 WARN L197 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2020-12-23 06:47:04,808 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 7 disjuncts [2020-12-23 06:47:04,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 06:47:04,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 06:47:04,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 06:47:04,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 06:47:04,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 06:47:04,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 06:47:04,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 06:47:04,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 06:47:04,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 06:47:04,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 06:47:04,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 06:47:04,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 06:47:04,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 06:47:04,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 06:47:04,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 06:47:04,964 INFO L244 Elim1Store]: Index analysis took 141 ms [2020-12-23 06:47:06,722 WARN L197 SmtUtils]: Spent 1.76 s on a formula simplification that was a NOOP. DAG size: 67 [2020-12-23 06:47:06,723 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 06:47:06,723 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 15 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 106 treesize of output 176 [2020-12-23 06:47:06,729 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:47:06,731 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:47:06,732 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:47:06,734 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:47:06,736 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:47:06,738 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:47:06,741 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 06:47:09,250 WARN L197 SmtUtils]: Spent 2.50 s on a formula simplification. DAG size of input: 127 DAG size of output: 87 [2020-12-23 06:47:09,251 INFO L348 Elim1Store]: treesize reduction 232, result has 50.5 percent of original size [2020-12-23 06:47:09,252 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 105 treesize of output 263 [2020-12-23 06:47:09,257 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 06:47:09,258 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:47:09,261 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 06:47:09,261 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:47:09,264 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 06:47:09,264 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:47:09,266 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 7 disjuncts [2020-12-23 06:47:09,267 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2020-12-23 06:47:09,268 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-23 06:47:09,269 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-23 06:47:09,269 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 06:47:09,270 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:47:09,270 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:47:09,274 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 06:47:09,275 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2020-12-23 06:47:09,277 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:47:09,279 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-23 06:47:09,279 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-23 06:47:09,280 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 06:47:09,281 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:47:09,281 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:47:09,284 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-23 06:47:09,285 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 06:47:09,285 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:47:09,286 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:47:09,289 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-23 06:47:09,290 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-23 06:47:09,291 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 06:47:09,291 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:47:09,292 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:47:09,295 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-23 06:47:09,296 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 06:47:09,297 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:47:09,297 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:47:09,305 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-23 06:47:10,596 WARN L197 SmtUtils]: Spent 1.29 s on a formula simplification. DAG size of input: 70 DAG size of output: 53 [2020-12-23 06:47:10,598 INFO L625 ElimStorePlain]: treesize reduction 266, result has 46.3 percent of original size [2020-12-23 06:47:10,600 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 2 xjuncts. [2020-12-23 06:47:10,601 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:273, output treesize:229 [2020-12-23 06:47:11,836 WARN L197 SmtUtils]: Spent 567.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2020-12-23 06:47:12,827 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2020-12-23 06:47:13,239 WARN L197 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2020-12-23 06:47:14,125 WARN L197 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-12-23 06:47:14,560 WARN L197 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 36 [2020-12-23 06:47:16,975 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 06:47:17,460 WARN L197 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 32 [2020-12-23 06:47:17,512 INFO L757 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-23 06:47:17,735 INFO L757 QuantifierPusher]: Run 20 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-23 06:47:18,196 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:47:18,196 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:47:18,196 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 29] total 50 [2020-12-23 06:47:18,196 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103780726] [2020-12-23 06:47:18,197 INFO L461 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-12-23 06:47:18,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:47:18,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-12-23 06:47:18,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=2334, Unknown=0, NotChecked=0, Total=2450 [2020-12-23 06:47:18,198 INFO L87 Difference]: Start difference. First operand 61 states and 62 transitions. Second operand 50 states. [2020-12-23 06:47:18,816 WARN L197 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 54 [2020-12-23 06:47:19,242 WARN L197 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 55 [2020-12-23 06:47:19,837 WARN L197 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 39 [2020-12-23 06:47:20,394 WARN L197 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 40 [2020-12-23 06:47:20,925 WARN L197 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 50 [2020-12-23 06:47:21,486 WARN L197 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 43 [2020-12-23 06:47:22,091 WARN L197 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 44 [2020-12-23 06:47:22,718 WARN L197 SmtUtils]: Spent 295.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 54 [2020-12-23 06:47:23,352 WARN L197 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 51 [2020-12-23 06:47:24,008 WARN L197 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 52 [2020-12-23 06:47:24,710 WARN L197 SmtUtils]: Spent 350.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 62 [2020-12-23 06:47:25,475 WARN L197 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 59 [2020-12-23 06:47:26,286 WARN L197 SmtUtils]: Spent 285.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 60 [2020-12-23 06:47:27,127 WARN L197 SmtUtils]: Spent 392.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 70 [2020-12-23 06:47:27,975 WARN L197 SmtUtils]: Spent 355.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 69 [2020-12-23 06:47:29,298 WARN L197 SmtUtils]: Spent 477.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 70 [2020-12-23 06:47:30,564 WARN L197 SmtUtils]: Spent 621.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 80 [2020-12-23 06:47:32,154 WARN L197 SmtUtils]: Spent 328.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 76 [2020-12-23 06:47:33,642 WARN L197 SmtUtils]: Spent 327.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 77 [2020-12-23 06:47:35,431 WARN L197 SmtUtils]: Spent 973.00 ms on a formula simplification. DAG size of input: 159 DAG size of output: 84 [2020-12-23 06:47:36,238 WARN L197 SmtUtils]: Spent 319.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 48 [2020-12-23 06:47:37,109 WARN L197 SmtUtils]: Spent 384.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 46 [2020-12-23 06:47:38,045 WARN L197 SmtUtils]: Spent 346.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 47 [2020-12-23 06:47:38,905 WARN L197 SmtUtils]: Spent 366.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 48 [2020-12-23 06:47:39,966 WARN L197 SmtUtils]: Spent 457.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 49 [2020-12-23 06:47:40,991 WARN L197 SmtUtils]: Spent 471.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 50 [2020-12-23 06:47:41,857 WARN L197 SmtUtils]: Spent 306.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 48 [2020-12-23 06:47:42,696 WARN L197 SmtUtils]: Spent 330.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 49 [2020-12-23 06:47:43,566 WARN L197 SmtUtils]: Spent 401.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 46 [2020-12-23 06:47:44,415 WARN L197 SmtUtils]: Spent 427.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 47 [2020-12-23 06:47:45,304 WARN L197 SmtUtils]: Spent 380.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 38 [2020-12-23 06:47:46,052 WARN L197 SmtUtils]: Spent 359.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 39 [2020-12-23 06:47:47,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:47:47,218 INFO L93 Difference]: Finished difference Result 74 states and 77 transitions. [2020-12-23 06:47:47,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-12-23 06:47:47,221 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 58 [2020-12-23 06:47:47,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:47:47,222 INFO L225 Difference]: With dead ends: 74 [2020-12-23 06:47:47,222 INFO L226 Difference]: Without dead ends: 68 [2020-12-23 06:47:47,225 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 23 SyntacticMatches, 12 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1525 ImplicationChecksByTransitivity, 41.8s TimeCoverageRelationStatistics Valid=428, Invalid=6544, Unknown=0, NotChecked=0, Total=6972 [2020-12-23 06:47:47,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-12-23 06:47:47,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 67. [2020-12-23 06:47:47,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-12-23 06:47:47,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 69 transitions. [2020-12-23 06:47:47,236 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 69 transitions. Word has length 58 [2020-12-23 06:47:47,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:47:47,236 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 69 transitions. [2020-12-23 06:47:47,236 INFO L482 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-12-23 06:47:47,236 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 69 transitions. [2020-12-23 06:47:47,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-12-23 06:47:47,237 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:47:47,237 INFO L422 BasicCegarLoop]: trace histogram [14, 13, 13, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:47:47,441 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-12-23 06:47:47,442 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:47:47,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:47:47,443 INFO L82 PathProgramCache]: Analyzing trace with hash 318654378, now seen corresponding path program 11 times [2020-12-23 06:47:47,443 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:47:47,443 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137499777] [2020-12-23 06:47:47,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:47:47,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:47:48,060 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 39 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:47:48,061 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137499777] [2020-12-23 06:47:48,061 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1765618560] [2020-12-23 06:47:48,061 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 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:47:50,914 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2020-12-23 06:47:50,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:47:50,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 44 conjunts are in the unsatisfiable core [2020-12-23 06:47:50,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:47:51,666 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 39 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:47:51,666 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:47:51,666 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-12-23 06:47:51,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004838995] [2020-12-23 06:47:51,667 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-23 06:47:51,667 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:47:51,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-23 06:47:51,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2020-12-23 06:47:51,667 INFO L87 Difference]: Start difference. First operand 67 states and 69 transitions. Second operand 17 states. [2020-12-23 06:47:53,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:47:53,478 INFO L93 Difference]: Finished difference Result 78 states and 81 transitions. [2020-12-23 06:47:53,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-23 06:47:53,482 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 62 [2020-12-23 06:47:53,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:47:53,483 INFO L225 Difference]: With dead ends: 78 [2020-12-23 06:47:53,483 INFO L226 Difference]: Without dead ends: 68 [2020-12-23 06:47:53,484 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 48 SyntacticMatches, 14 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2020-12-23 06:47:53,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-12-23 06:47:53,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 67. [2020-12-23 06:47:53,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-12-23 06:47:53,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 68 transitions. [2020-12-23 06:47:53,493 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 68 transitions. Word has length 62 [2020-12-23 06:47:53,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:47:53,494 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 68 transitions. [2020-12-23 06:47:53,494 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-23 06:47:53,494 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 68 transitions. [2020-12-23 06:47:53,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-23 06:47:53,494 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:47:53,494 INFO L422 BasicCegarLoop]: trace histogram [15, 14, 14, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:47:53,695 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-12-23 06:47:53,695 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:47:53,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:47:53,696 INFO L82 PathProgramCache]: Analyzing trace with hash 1852158082, now seen corresponding path program 12 times [2020-12-23 06:47:53,696 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:47:53,697 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244659904] [2020-12-23 06:47:53,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:47:53,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:47:54,470 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 42 proven. 364 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:47:54,470 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244659904] [2020-12-23 06:47:54,470 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [427835745] [2020-12-23 06:47:54,470 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 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:47:57,153 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2020-12-23 06:47:57,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:47:57,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 33 conjunts are in the unsatisfiable core [2020-12-23 06:47:57,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:47:57,576 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 42 proven. 364 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:47:57,576 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:47:57,576 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-12-23 06:47:57,577 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231792336] [2020-12-23 06:47:57,577 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-23 06:47:57,577 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:47:57,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-23 06:47:57,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2020-12-23 06:47:57,578 INFO L87 Difference]: Start difference. First operand 67 states and 68 transitions. Second operand 18 states. [2020-12-23 06:47:59,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:47:59,757 INFO L93 Difference]: Finished difference Result 88 states and 91 transitions. [2020-12-23 06:47:59,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-23 06:47:59,760 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 66 [2020-12-23 06:47:59,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:47:59,761 INFO L225 Difference]: With dead ends: 88 [2020-12-23 06:47:59,761 INFO L226 Difference]: Without dead ends: 78 [2020-12-23 06:47:59,762 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 64 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2020-12-23 06:47:59,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-12-23 06:47:59,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 69. [2020-12-23 06:47:59,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-12-23 06:47:59,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2020-12-23 06:47:59,774 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 66 [2020-12-23 06:47:59,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:47:59,774 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2020-12-23 06:47:59,774 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-23 06:47:59,774 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2020-12-23 06:47:59,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-23 06:47:59,775 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:47:59,775 INFO L422 BasicCegarLoop]: trace histogram [15, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:47:59,979 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-12-23 06:47:59,980 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:47:59,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:47:59,980 INFO L82 PathProgramCache]: Analyzing trace with hash 1042811456, now seen corresponding path program 8 times [2020-12-23 06:47:59,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:47:59,981 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52956828] [2020-12-23 06:47:59,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:48:00,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:48:54,435 WARN L197 SmtUtils]: Spent 319.00 ms on a formula simplification. DAG size of input: 183 DAG size of output: 52 [2020-12-23 06:48:54,916 WARN L197 SmtUtils]: Spent 418.00 ms on a formula simplification. DAG size of input: 210 DAG size of output: 70 [2020-12-23 06:48:55,656 WARN L197 SmtUtils]: Spent 584.00 ms on a formula simplification. DAG size of input: 215 DAG size of output: 63