/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/array-cav19/array_init_var_plus_ind.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-dcfa08f [2020-12-23 01:07:58,499 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-23 01:07:58,502 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-23 01:07:58,546 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-23 01:07:58,546 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-23 01:07:58,548 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-23 01:07:58,550 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-23 01:07:58,552 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-23 01:07:58,555 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-23 01:07:58,557 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-23 01:07:58,558 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-23 01:07:58,560 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-23 01:07:58,560 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-23 01:07:58,561 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-23 01:07:58,563 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-23 01:07:58,565 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-23 01:07:58,566 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-23 01:07:58,567 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-23 01:07:58,570 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-23 01:07:58,572 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-23 01:07:58,574 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-23 01:07:58,576 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-23 01:07:58,578 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-23 01:07:58,593 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-23 01:07:58,597 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-23 01:07:58,602 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-23 01:07:58,603 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-23 01:07:58,604 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-23 01:07:58,605 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-23 01:07:58,606 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-23 01:07:58,607 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-23 01:07:58,608 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-23 01:07:58,608 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-23 01:07:58,609 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-23 01:07:58,610 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-23 01:07:58,611 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-23 01:07:58,612 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-23 01:07:58,642 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-23 01:07:58,642 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-23 01:07:58,644 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-23 01:07:58,644 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-23 01:07:58,644 INFO L138 SettingsManager]: * Use SBE=true [2020-12-23 01:07:58,645 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-23 01:07:58,645 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-23 01:07:58,645 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-23 01:07:58,645 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-23 01:07:58,646 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-23 01:07:58,646 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-23 01:07:58,646 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-23 01:07:58,647 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-23 01:07:58,647 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-23 01:07:58,647 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-23 01:07:58,648 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-23 01:07:58,648 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-23 01:07:58,648 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 01:07:58,648 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-23 01:07:58,649 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-23 01:07:58,649 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-23 01:07:58,649 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-23 01:07:58,649 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-23 01:07:58,650 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-23 01:07:58,650 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-23 01:07:58,650 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-23 01:07:59,078 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-23 01:07:59,112 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-23 01:07:59,115 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-23 01:07:59,117 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-23 01:07:59,118 INFO L275 PluginConnector]: CDTParser initialized [2020-12-23 01:07:59,119 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-cav19/array_init_var_plus_ind.c [2020-12-23 01:07:59,217 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/9dbf27da4/6b78e95f69144d6facb325d2a4530c64/FLAGcee554466 [2020-12-23 01:07:59,844 INFO L306 CDTParser]: Found 1 translation units. [2020-12-23 01:07:59,845 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-cav19/array_init_var_plus_ind.c [2020-12-23 01:07:59,854 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/9dbf27da4/6b78e95f69144d6facb325d2a4530c64/FLAGcee554466 [2020-12-23 01:08:00,225 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/9dbf27da4/6b78e95f69144d6facb325d2a4530c64 [2020-12-23 01:08:00,230 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-23 01:08:00,233 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-23 01:08:00,238 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-23 01:08:00,238 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-23 01:08:00,242 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-23 01:08:00,244 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 01:08:00" (1/1) ... [2020-12-23 01:08:00,248 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@59f4b681 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:08:00, skipping insertion in model container [2020-12-23 01:08:00,248 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 01:08:00" (1/1) ... [2020-12-23 01:08:00,258 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-23 01:08:00,286 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-23 01:08:00,537 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-cav19/array_init_var_plus_ind.c[414,427] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~a~0,],[IdentifierExpression[~i~0,]]] left hand side expression in assignment: lhs: VariableLHS[~j~0,] [2020-12-23 01:08:00,566 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 01:08:00,576 INFO L203 MainTranslator]: Completed pre-run [2020-12-23 01:08:00,595 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-cav19/array_init_var_plus_ind.c[414,427] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#a~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#a~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~j~0,] [2020-12-23 01:08:00,612 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 01:08:00,635 INFO L208 MainTranslator]: Completed translation [2020-12-23 01:08:00,635 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:08:00 WrapperNode [2020-12-23 01:08:00,635 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-23 01:08:00,638 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-23 01:08:00,638 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-23 01:08:00,638 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-23 01:08:00,648 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:08:00" (1/1) ... [2020-12-23 01:08:00,659 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:08:00" (1/1) ... [2020-12-23 01:08:00,683 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-23 01:08:00,686 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-23 01:08:00,686 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-23 01:08:00,687 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-23 01:08:00,696 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:08:00" (1/1) ... [2020-12-23 01:08:00,697 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:08:00" (1/1) ... [2020-12-23 01:08:00,709 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:08:00" (1/1) ... [2020-12-23 01:08:00,709 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:08:00" (1/1) ... [2020-12-23 01:08:00,722 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:08:00" (1/1) ... [2020-12-23 01:08:00,730 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:08:00" (1/1) ... [2020-12-23 01:08:00,735 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:08:00" (1/1) ... [2020-12-23 01:08:00,743 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-23 01:08:00,744 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-23 01:08:00,745 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-23 01:08:00,746 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-23 01:08:00,748 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:08:00" (1/1) ... No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 01:08:00,855 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-23 01:08:00,855 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-23 01:08:00,855 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-23 01:08:00,855 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-23 01:08:00,856 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-23 01:08:00,856 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-23 01:08:00,856 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-23 01:08:01,142 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-23 01:08:01,142 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2020-12-23 01:08:01,147 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 01:08:01 BoogieIcfgContainer [2020-12-23 01:08:01,148 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-23 01:08:01,153 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-23 01:08:01,153 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-23 01:08:01,163 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-23 01:08:01,164 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.12 01:08:00" (1/3) ... [2020-12-23 01:08:01,168 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47aadded and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 01:08:01, skipping insertion in model container [2020-12-23 01:08:01,169 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:08:00" (2/3) ... [2020-12-23 01:08:01,169 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47aadded and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 01:08:01, skipping insertion in model container [2020-12-23 01:08:01,169 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 01:08:01" (3/3) ... [2020-12-23 01:08:01,175 INFO L111 eAbstractionObserver]: Analyzing ICFG array_init_var_plus_ind.c [2020-12-23 01:08:01,194 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-23 01:08:01,206 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-23 01:08:01,244 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-23 01:08:01,275 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-23 01:08:01,275 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-23 01:08:01,275 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-23 01:08:01,276 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-23 01:08:01,276 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-23 01:08:01,276 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-23 01:08:01,276 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-23 01:08:01,276 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-23 01:08:01,292 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states. [2020-12-23 01:08:01,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-23 01:08:01,299 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:08:01,300 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:08:01,300 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:08:01,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:08:01,308 INFO L82 PathProgramCache]: Analyzing trace with hash 1818270042, now seen corresponding path program 1 times [2020-12-23 01:08:01,318 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:08:01,319 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861307906] [2020-12-23 01:08:01,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:08:01,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:08:01,495 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:08:01,496 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861307906] [2020-12-23 01:08:01,497 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 01:08:01,497 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-23 01:08:01,498 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220559839] [2020-12-23 01:08:01,503 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-23 01:08:01,503 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:08:01,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-23 01:08:01,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-23 01:08:01,522 INFO L87 Difference]: Start difference. First operand 16 states. Second operand 2 states. [2020-12-23 01:08:01,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:08:01,540 INFO L93 Difference]: Finished difference Result 27 states and 34 transitions. [2020-12-23 01:08:01,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-23 01:08:01,542 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 7 [2020-12-23 01:08:01,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:08:01,552 INFO L225 Difference]: With dead ends: 27 [2020-12-23 01:08:01,552 INFO L226 Difference]: Without dead ends: 12 [2020-12-23 01:08:01,556 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-23 01:08:01,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2020-12-23 01:08:01,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2020-12-23 01:08:01,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-12-23 01:08:01,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 14 transitions. [2020-12-23 01:08:01,593 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 14 transitions. Word has length 7 [2020-12-23 01:08:01,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:08:01,594 INFO L481 AbstractCegarLoop]: Abstraction has 12 states and 14 transitions. [2020-12-23 01:08:01,594 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-23 01:08:01,594 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 14 transitions. [2020-12-23 01:08:01,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-23 01:08:01,595 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:08:01,595 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:08:01,595 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-23 01:08:01,596 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:08:01,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:08:01,601 INFO L82 PathProgramCache]: Analyzing trace with hash 1808111311, now seen corresponding path program 1 times [2020-12-23 01:08:01,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:08:01,602 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777877065] [2020-12-23 01:08:01,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:08:01,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:08:01,754 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:08:01,754 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777877065] [2020-12-23 01:08:01,755 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 01:08:01,755 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 01:08:01,756 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698609624] [2020-12-23 01:08:01,759 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 01:08:01,760 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:08:01,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 01:08:01,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-23 01:08:01,761 INFO L87 Difference]: Start difference. First operand 12 states and 14 transitions. Second operand 4 states. [2020-12-23 01:08:01,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:08:01,815 INFO L93 Difference]: Finished difference Result 29 states and 33 transitions. [2020-12-23 01:08:01,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 01:08:01,816 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2020-12-23 01:08:01,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:08:01,817 INFO L225 Difference]: With dead ends: 29 [2020-12-23 01:08:01,817 INFO L226 Difference]: Without dead ends: 22 [2020-12-23 01:08:01,819 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 01:08:01,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-12-23 01:08:01,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 13. [2020-12-23 01:08:01,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-12-23 01:08:01,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2020-12-23 01:08:01,825 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 7 [2020-12-23 01:08:01,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:08:01,825 INFO L481 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2020-12-23 01:08:01,826 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 01:08:01,826 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2020-12-23 01:08:01,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-23 01:08:01,826 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:08:01,827 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:08:01,827 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-23 01:08:01,827 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:08:01,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:08:01,828 INFO L82 PathProgramCache]: Analyzing trace with hash 266504688, now seen corresponding path program 1 times [2020-12-23 01:08:01,828 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:08:01,829 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139930568] [2020-12-23 01:08:01,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:08:01,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:08:01,903 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:08:01,903 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139930568] [2020-12-23 01:08:01,903 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 01:08:01,904 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-23 01:08:01,904 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537806943] [2020-12-23 01:08:01,904 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 01:08:01,905 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:08:01,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 01:08:01,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-23 01:08:01,906 INFO L87 Difference]: Start difference. First operand 13 states and 15 transitions. Second operand 4 states. [2020-12-23 01:08:01,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:08:01,929 INFO L93 Difference]: Finished difference Result 23 states and 26 transitions. [2020-12-23 01:08:01,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 01:08:01,930 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2020-12-23 01:08:01,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:08:01,931 INFO L225 Difference]: With dead ends: 23 [2020-12-23 01:08:01,931 INFO L226 Difference]: Without dead ends: 15 [2020-12-23 01:08:01,932 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 01:08:01,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-12-23 01:08:01,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 14. [2020-12-23 01:08:01,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-12-23 01:08:01,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2020-12-23 01:08:01,936 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 8 [2020-12-23 01:08:01,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:08:01,937 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2020-12-23 01:08:01,937 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 01:08:01,937 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2020-12-23 01:08:01,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-23 01:08:01,938 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:08:01,938 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:08:01,938 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-23 01:08:01,939 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:08:01,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:08:01,939 INFO L82 PathProgramCache]: Analyzing trace with hash 53732745, now seen corresponding path program 1 times [2020-12-23 01:08:01,940 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:08:01,940 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108089219] [2020-12-23 01:08:01,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:08:01,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:08:02,013 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:08:02,013 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108089219] [2020-12-23 01:08:02,014 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [653717032] [2020-12-23 01:08:02,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:08:02,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:08:02,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-23 01:08:02,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:08:02,288 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:08:02,290 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:08:02,291 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 8 [2020-12-23 01:08:02,291 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697128686] [2020-12-23 01:08:02,292 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-23 01:08:02,292 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:08:02,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-23 01:08:02,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-12-23 01:08:02,295 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand 8 states. [2020-12-23 01:08:02,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:08:02,405 INFO L93 Difference]: Finished difference Result 27 states and 31 transitions. [2020-12-23 01:08:02,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 01:08:02,405 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 10 [2020-12-23 01:08:02,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:08:02,407 INFO L225 Difference]: With dead ends: 27 [2020-12-23 01:08:02,407 INFO L226 Difference]: Without dead ends: 18 [2020-12-23 01:08:02,409 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-12-23 01:08:02,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-12-23 01:08:02,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2020-12-23 01:08:02,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-12-23 01:08:02,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2020-12-23 01:08:02,419 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 10 [2020-12-23 01:08:02,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:08:02,419 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2020-12-23 01:08:02,419 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-23 01:08:02,420 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2020-12-23 01:08:02,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-23 01:08:02,421 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:08:02,422 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:08:02,637 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:08:02,637 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:08:02,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:08:02,639 INFO L82 PathProgramCache]: Analyzing trace with hash 818898063, now seen corresponding path program 2 times [2020-12-23 01:08:02,639 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:08:02,640 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053041098] [2020-12-23 01:08:02,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:08:02,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:08:02,706 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:08:02,707 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053041098] [2020-12-23 01:08:02,707 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [938456245] [2020-12-23 01:08:02,707 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 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:08:02,772 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 01:08:02,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:08:02,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-23 01:08:02,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:08:02,848 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:08:02,849 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:08:02,849 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2020-12-23 01:08:02,849 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58707291] [2020-12-23 01:08:02,850 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-23 01:08:02,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:08:02,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-23 01:08:02,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=39, Unknown=0, NotChecked=0, Total=72 [2020-12-23 01:08:02,851 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand 9 states. [2020-12-23 01:08:02,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:08:02,895 INFO L93 Difference]: Finished difference Result 35 states and 39 transitions. [2020-12-23 01:08:02,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 01:08:02,896 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2020-12-23 01:08:02,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:08:02,897 INFO L225 Difference]: With dead ends: 35 [2020-12-23 01:08:02,897 INFO L226 Difference]: Without dead ends: 28 [2020-12-23 01:08:02,898 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=39, Unknown=0, NotChecked=0, Total=72 [2020-12-23 01:08:02,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-12-23 01:08:02,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 19. [2020-12-23 01:08:02,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-12-23 01:08:02,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2020-12-23 01:08:02,903 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 13 [2020-12-23 01:08:02,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:08:02,903 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2020-12-23 01:08:02,903 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-23 01:08:02,903 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2020-12-23 01:08:02,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 01:08:02,904 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:08:02,904 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:08:03,119 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:08:03,121 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:08:03,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:08:03,122 INFO L82 PathProgramCache]: Analyzing trace with hash -334334928, now seen corresponding path program 1 times [2020-12-23 01:08:03,122 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:08:03,123 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872461652] [2020-12-23 01:08:03,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:08:03,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:08:03,346 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:08:03,347 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872461652] [2020-12-23 01:08:03,347 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [179396328] [2020-12-23 01:08:03,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:08:03,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:08:03,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-23 01:08:03,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:08:03,502 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 15 treesize of output 11 [2020-12-23 01:08:03,503 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:08:03,511 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:08:03,516 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-23 01:08:03,516 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:25, output treesize:18 [2020-12-23 01:08:03,563 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 01:08:03,568 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 01:08:03,583 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:08:03,583 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:08:03,583 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 11 [2020-12-23 01:08:03,584 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997677030] [2020-12-23 01:08:03,584 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-23 01:08:03,584 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:08:03,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-23 01:08:03,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-12-23 01:08:03,585 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand 11 states. [2020-12-23 01:08:03,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:08:03,720 INFO L93 Difference]: Finished difference Result 35 states and 38 transitions. [2020-12-23 01:08:03,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-23 01:08:03,720 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-12-23 01:08:03,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:08:03,721 INFO L225 Difference]: With dead ends: 35 [2020-12-23 01:08:03,721 INFO L226 Difference]: Without dead ends: 33 [2020-12-23 01:08:03,722 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-12-23 01:08:03,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-12-23 01:08:03,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 23. [2020-12-23 01:08:03,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-12-23 01:08:03,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2020-12-23 01:08:03,727 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 14 [2020-12-23 01:08:03,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:08:03,727 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2020-12-23 01:08:03,727 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-23 01:08:03,727 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2020-12-23 01:08:03,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-23 01:08:03,731 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:08:03,731 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:08:03,941 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:08:03,942 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:08:03,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:08:03,943 INFO L82 PathProgramCache]: Analyzing trace with hash -1827520567, now seen corresponding path program 3 times [2020-12-23 01:08:03,944 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:08:03,944 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026085255] [2020-12-23 01:08:03,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:08:03,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:08:04,055 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:08:04,056 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026085255] [2020-12-23 01:08:04,056 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [658537258] [2020-12-23 01:08:04,057 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 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:08:04,107 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-12-23 01:08:04,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:08:04,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-23 01:08:04,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:08:04,198 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:08:04,199 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:08:04,199 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2020-12-23 01:08:04,199 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159293388] [2020-12-23 01:08:04,199 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-23 01:08:04,200 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:08:04,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-23 01:08:04,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=61, Unknown=0, NotChecked=0, Total=110 [2020-12-23 01:08:04,201 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand 11 states. [2020-12-23 01:08:04,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:08:04,262 INFO L93 Difference]: Finished difference Result 47 states and 52 transitions. [2020-12-23 01:08:04,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-23 01:08:04,262 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 16 [2020-12-23 01:08:04,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:08:04,263 INFO L225 Difference]: With dead ends: 47 [2020-12-23 01:08:04,263 INFO L226 Difference]: Without dead ends: 40 [2020-12-23 01:08:04,264 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=49, Invalid=61, Unknown=0, NotChecked=0, Total=110 [2020-12-23 01:08:04,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-12-23 01:08:04,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 25. [2020-12-23 01:08:04,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-12-23 01:08:04,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2020-12-23 01:08:04,269 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 16 [2020-12-23 01:08:04,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:08:04,270 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2020-12-23 01:08:04,270 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-23 01:08:04,270 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2020-12-23 01:08:04,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-23 01:08:04,270 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:08:04,271 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:08:04,484 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:08:04,485 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:08:04,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:08:04,486 INFO L82 PathProgramCache]: Analyzing trace with hash -768933834, now seen corresponding path program 2 times [2020-12-23 01:08:04,486 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:08:04,487 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894479030] [2020-12-23 01:08:04,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:08:04,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:08:04,713 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:08:04,714 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894479030] [2020-12-23 01:08:04,714 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [479245902] [2020-12-23 01:08:04,714 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:08:04,777 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 01:08:04,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:08:04,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-23 01:08:04,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:08:04,826 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 15 treesize of output 11 [2020-12-23 01:08:04,827 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:08:04,839 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:08:04,840 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 01:08:04,841 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2020-12-23 01:08:04,930 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:08:04,931 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 62 [2020-12-23 01:08:04,934 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 01:08:04,937 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:08:04,964 INFO L625 ElimStorePlain]: treesize reduction 28, result has 54.8 percent of original size [2020-12-23 01:08:04,969 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-23 01:08:04,969 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:38, output treesize:18 [2020-12-23 01:08:05,014 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 01:08:05,017 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 01:08:05,037 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:08:05,037 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:08:05,037 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2020-12-23 01:08:05,038 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735660143] [2020-12-23 01:08:05,038 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-23 01:08:05,038 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:08:05,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-23 01:08:05,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2020-12-23 01:08:05,039 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand 13 states. [2020-12-23 01:08:05,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:08:05,280 INFO L93 Difference]: Finished difference Result 32 states and 35 transitions. [2020-12-23 01:08:05,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-23 01:08:05,281 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-12-23 01:08:05,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:08:05,282 INFO L225 Difference]: With dead ends: 32 [2020-12-23 01:08:05,282 INFO L226 Difference]: Without dead ends: 30 [2020-12-23 01:08:05,283 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2020-12-23 01:08:05,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-12-23 01:08:05,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 24. [2020-12-23 01:08:05,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-12-23 01:08:05,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2020-12-23 01:08:05,288 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 17 [2020-12-23 01:08:05,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:08:05,288 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2020-12-23 01:08:05,289 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-23 01:08:05,289 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2020-12-23 01:08:05,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-12-23 01:08:05,289 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:08:05,289 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:08:05,502 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:08:05,503 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:08:05,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:08:05,504 INFO L82 PathProgramCache]: Analyzing trace with hash 20881638, now seen corresponding path program 1 times [2020-12-23 01:08:05,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:08:05,505 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771202250] [2020-12-23 01:08:05,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:08:05,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:08:05,591 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:08:05,592 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771202250] [2020-12-23 01:08:05,592 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [82594537] [2020-12-23 01:08:05,592 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 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:08:05,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:08:05,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-23 01:08:05,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:08:05,727 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:08:05,727 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:08:05,727 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2020-12-23 01:08:05,728 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451350772] [2020-12-23 01:08:05,728 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-23 01:08:05,728 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:08:05,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-23 01:08:05,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2020-12-23 01:08:05,729 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand 10 states. [2020-12-23 01:08:05,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:08:05,781 INFO L93 Difference]: Finished difference Result 36 states and 39 transitions. [2020-12-23 01:08:05,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-23 01:08:05,790 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 18 [2020-12-23 01:08:05,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:08:05,791 INFO L225 Difference]: With dead ends: 36 [2020-12-23 01:08:05,791 INFO L226 Difference]: Without dead ends: 24 [2020-12-23 01:08:05,794 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2020-12-23 01:08:05,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-12-23 01:08:05,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-12-23 01:08:05,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-12-23 01:08:05,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2020-12-23 01:08:05,799 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 18 [2020-12-23 01:08:05,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:08:05,800 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2020-12-23 01:08:05,800 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-23 01:08:05,800 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2020-12-23 01:08:05,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-12-23 01:08:05,801 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:08:05,801 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:08:06,016 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:08:06,017 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:08:06,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:08:06,018 INFO L82 PathProgramCache]: Analyzing trace with hash -796542484, now seen corresponding path program 2 times [2020-12-23 01:08:06,018 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:08:06,019 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190455888] [2020-12-23 01:08:06,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:08:06,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:08:06,244 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:08:06,244 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190455888] [2020-12-23 01:08:06,244 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2071397702] [2020-12-23 01:08:06,245 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:08:06,309 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 01:08:06,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:08:06,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 25 conjunts are in the unsatisfiable core [2020-12-23 01:08:06,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:08:06,417 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 15 treesize of output 11 [2020-12-23 01:08:06,418 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:08:06,425 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:08:06,428 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 01:08:06,428 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:22, output treesize:15 [2020-12-23 01:08:06,697 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 01:08:06,701 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 01:08:06,706 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 01:08:06,710 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 01:08:06,715 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-23 01:08:06,744 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:08:06,745 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:08:06,745 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2020-12-23 01:08:06,745 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103344002] [2020-12-23 01:08:06,746 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-23 01:08:06,746 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:08:06,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-23 01:08:06,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2020-12-23 01:08:06,747 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 19 states. [2020-12-23 01:08:07,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:08:07,253 INFO L93 Difference]: Finished difference Result 37 states and 40 transitions. [2020-12-23 01:08:07,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-23 01:08:07,254 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 21 [2020-12-23 01:08:07,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:08:07,258 INFO L225 Difference]: With dead ends: 37 [2020-12-23 01:08:07,258 INFO L226 Difference]: Without dead ends: 26 [2020-12-23 01:08:07,259 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=98, Invalid=408, Unknown=0, NotChecked=0, Total=506 [2020-12-23 01:08:07,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-12-23 01:08:07,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2020-12-23 01:08:07,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-12-23 01:08:07,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2020-12-23 01:08:07,274 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 21 [2020-12-23 01:08:07,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:08:07,274 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2020-12-23 01:08:07,275 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-23 01:08:07,275 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2020-12-23 01:08:07,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-12-23 01:08:07,281 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:08:07,281 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:08:07,481 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-12-23 01:08:07,482 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:08:07,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:08:07,484 INFO L82 PathProgramCache]: Analyzing trace with hash 1605494661, now seen corresponding path program 1 times [2020-12-23 01:08:07,484 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:08:07,484 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661649623] [2020-12-23 01:08:07,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:08:07,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:08:07,585 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-23 01:08:07,585 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661649623] [2020-12-23 01:08:07,586 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1888889380] [2020-12-23 01:08:07,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:08:07,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:08:07,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-23 01:08:07,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:08:07,721 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-23 01:08:07,721 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:08:07,722 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2020-12-23 01:08:07,722 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130764651] [2020-12-23 01:08:07,722 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-23 01:08:07,722 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:08:07,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-23 01:08:07,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-12-23 01:08:07,723 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand 13 states. [2020-12-23 01:08:07,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:08:07,807 INFO L93 Difference]: Finished difference Result 47 states and 51 transitions. [2020-12-23 01:08:07,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-23 01:08:07,808 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 23 [2020-12-23 01:08:07,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:08:07,808 INFO L225 Difference]: With dead ends: 47 [2020-12-23 01:08:07,809 INFO L226 Difference]: Without dead ends: 38 [2020-12-23 01:08:07,809 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-12-23 01:08:07,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-12-23 01:08:07,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 27. [2020-12-23 01:08:07,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-12-23 01:08:07,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2020-12-23 01:08:07,826 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 23 [2020-12-23 01:08:07,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:08:07,827 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2020-12-23 01:08:07,827 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-23 01:08:07,827 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2020-12-23 01:08:07,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-12-23 01:08:07,827 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:08:07,827 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:08:08,028 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2020-12-23 01:08:08,029 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:08:08,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:08:08,030 INFO L82 PathProgramCache]: Analyzing trace with hash -213992666, now seen corresponding path program 3 times [2020-12-23 01:08:08,030 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:08:08,031 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137553028] [2020-12-23 01:08:08,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:08:08,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:08:08,277 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:08:08,278 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137553028] [2020-12-23 01:08:08,278 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1146205492] [2020-12-23 01:08:08,278 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:08:08,359 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-12-23 01:08:08,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:08:08,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 30 conjunts are in the unsatisfiable core [2020-12-23 01:08:08,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:08:08,424 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 15 treesize of output 11 [2020-12-23 01:08:08,425 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:08:08,435 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:08:08,437 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 01:08:08,437 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2020-12-23 01:08:08,501 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:08:08,502 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 62 [2020-12-23 01:08:08,503 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 01:08:08,505 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:08:08,556 INFO L625 ElimStorePlain]: treesize reduction 28, result has 54.8 percent of original size [2020-12-23 01:08:08,560 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-23 01:08:08,560 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:38, output treesize:18 [2020-12-23 01:08:08,676 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 01:08:08,680 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 01:08:08,722 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:08:08,723 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:08:08,723 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 17 [2020-12-23 01:08:08,727 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20068060] [2020-12-23 01:08:08,728 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-23 01:08:08,733 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:08:08,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-23 01:08:08,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2020-12-23 01:08:08,734 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand 17 states. [2020-12-23 01:08:09,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:08:09,139 INFO L93 Difference]: Finished difference Result 36 states and 38 transitions. [2020-12-23 01:08:09,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-23 01:08:09,140 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 24 [2020-12-23 01:08:09,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:08:09,141 INFO L225 Difference]: With dead ends: 36 [2020-12-23 01:08:09,141 INFO L226 Difference]: Without dead ends: 34 [2020-12-23 01:08:09,142 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=101, Invalid=451, Unknown=0, NotChecked=0, Total=552 [2020-12-23 01:08:09,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-12-23 01:08:09,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 31. [2020-12-23 01:08:09,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-12-23 01:08:09,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2020-12-23 01:08:09,162 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 24 [2020-12-23 01:08:09,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:08:09,164 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2020-12-23 01:08:09,164 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-23 01:08:09,164 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2020-12-23 01:08:09,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-12-23 01:08:09,168 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:08:09,169 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2020-12-23 01:08:09,385 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:08:09,385 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:08:09,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:08:09,386 INFO L82 PathProgramCache]: Analyzing trace with hash 2053274844, now seen corresponding path program 4 times [2020-12-23 01:08:09,387 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:08:09,387 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159587547] [2020-12-23 01:08:09,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:08:09,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:08:09,796 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:08:09,797 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159587547] [2020-12-23 01:08:09,797 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1284453743] [2020-12-23 01:08:09,797 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 01:08:09,849 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 01:08:09,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:08:09,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 31 conjunts are in the unsatisfiable core [2020-12-23 01:08:09,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:08:10,046 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 13 treesize of output 9 [2020-12-23 01:08:10,047 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:08:10,051 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:08:10,052 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 01:08:10,052 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:17, output treesize:9 [2020-12-23 01:08:10,203 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 01:08:10,206 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 01:08:10,247 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:08:10,247 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:08:10,248 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 27 [2020-12-23 01:08:10,248 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722637531] [2020-12-23 01:08:10,248 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-12-23 01:08:10,249 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:08:10,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-12-23 01:08:10,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=623, Unknown=0, NotChecked=0, Total=702 [2020-12-23 01:08:10,250 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand 27 states. [2020-12-23 01:08:10,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:08:10,908 INFO L93 Difference]: Finished difference Result 48 states and 51 transitions. [2020-12-23 01:08:10,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-23 01:08:10,908 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 28 [2020-12-23 01:08:10,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:08:10,909 INFO L225 Difference]: With dead ends: 48 [2020-12-23 01:08:10,909 INFO L226 Difference]: Without dead ends: 32 [2020-12-23 01:08:10,911 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=154, Invalid=1106, Unknown=0, NotChecked=0, Total=1260 [2020-12-23 01:08:10,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-12-23 01:08:10,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2020-12-23 01:08:10,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-12-23 01:08:10,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2020-12-23 01:08:10,916 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 28 [2020-12-23 01:08:10,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:08:10,917 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2020-12-23 01:08:10,917 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-12-23 01:08:10,917 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2020-12-23 01:08:10,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-12-23 01:08:10,917 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:08:10,918 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2020-12-23 01:08:11,130 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:08:11,131 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:08:11,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:08:11,132 INFO L82 PathProgramCache]: Analyzing trace with hash 1022889845, now seen corresponding path program 2 times [2020-12-23 01:08:11,132 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:08:11,133 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59171825] [2020-12-23 01:08:11,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:08:11,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:08:11,208 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-12-23 01:08:11,209 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59171825] [2020-12-23 01:08:11,209 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [853689760] [2020-12-23 01:08:11,209 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 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:08:11,278 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 01:08:11,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:08:11,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-23 01:08:11,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:08:11,393 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-12-23 01:08:11,394 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:08:11,394 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2020-12-23 01:08:11,394 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205900355] [2020-12-23 01:08:11,394 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-23 01:08:11,394 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:08:11,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-23 01:08:11,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=120, Unknown=0, NotChecked=0, Total=210 [2020-12-23 01:08:11,395 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand 15 states. [2020-12-23 01:08:11,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:08:11,481 INFO L93 Difference]: Finished difference Result 62 states and 66 transitions. [2020-12-23 01:08:11,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-23 01:08:11,481 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 30 [2020-12-23 01:08:11,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:08:11,482 INFO L225 Difference]: With dead ends: 62 [2020-12-23 01:08:11,482 INFO L226 Difference]: Without dead ends: 49 [2020-12-23 01:08:11,483 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=120, Unknown=0, NotChecked=0, Total=210 [2020-12-23 01:08:11,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-12-23 01:08:11,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 34. [2020-12-23 01:08:11,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-12-23 01:08:11,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 36 transitions. [2020-12-23 01:08:11,489 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 36 transitions. Word has length 30 [2020-12-23 01:08:11,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:08:11,489 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 36 transitions. [2020-12-23 01:08:11,489 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-23 01:08:11,490 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 36 transitions. [2020-12-23 01:08:11,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-12-23 01:08:11,490 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:08:11,491 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2020-12-23 01:08:11,703 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-12-23 01:08:11,704 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:08:11,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:08:11,705 INFO L82 PathProgramCache]: Analyzing trace with hash -272988574, now seen corresponding path program 5 times [2020-12-23 01:08:11,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:08:11,706 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458557772] [2020-12-23 01:08:11,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:08:11,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:08:12,081 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:08:12,082 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458557772] [2020-12-23 01:08:12,082 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1834366093] [2020-12-23 01:08:12,082 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 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:08:12,145 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-12-23 01:08:12,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:08:12,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 35 conjunts are in the unsatisfiable core [2020-12-23 01:08:12,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:08:12,229 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 15 treesize of output 11 [2020-12-23 01:08:12,230 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:08:12,243 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:08:12,245 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 01:08:12,245 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:22 [2020-12-23 01:08:12,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 01:08:12,340 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 32 [2020-12-23 01:08:12,343 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:08:12,354 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:08:12,356 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 01:08:12,356 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:47, output treesize:21 [2020-12-23 01:08:12,480 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 01:08:12,483 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 01:08:12,486 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 01:08:12,489 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 01:08:12,492 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-23 01:08:12,521 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:08:12,521 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:08:12,522 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 20 [2020-12-23 01:08:12,522 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064933549] [2020-12-23 01:08:12,523 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-23 01:08:12,523 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:08:12,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-23 01:08:12,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2020-12-23 01:08:12,524 INFO L87 Difference]: Start difference. First operand 34 states and 36 transitions. Second operand 20 states. [2020-12-23 01:08:13,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:08:13,114 INFO L93 Difference]: Finished difference Result 43 states and 45 transitions. [2020-12-23 01:08:13,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-23 01:08:13,115 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 31 [2020-12-23 01:08:13,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:08:13,115 INFO L225 Difference]: With dead ends: 43 [2020-12-23 01:08:13,115 INFO L226 Difference]: Without dead ends: 41 [2020-12-23 01:08:13,116 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 22 SyntacticMatches, 6 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=125, Invalid=687, Unknown=0, NotChecked=0, Total=812 [2020-12-23 01:08:13,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-12-23 01:08:13,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 38. [2020-12-23 01:08:13,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-12-23 01:08:13,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 40 transitions. [2020-12-23 01:08:13,123 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 40 transitions. Word has length 31 [2020-12-23 01:08:13,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:08:13,124 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 40 transitions. [2020-12-23 01:08:13,124 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-23 01:08:13,124 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 40 transitions. [2020-12-23 01:08:13,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-12-23 01:08:13,125 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:08:13,125 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2020-12-23 01:08:13,340 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-12-23 01:08:13,341 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:08:13,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:08:13,342 INFO L82 PathProgramCache]: Analyzing trace with hash -246527464, now seen corresponding path program 6 times [2020-12-23 01:08:13,342 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:08:13,342 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845769539] [2020-12-23 01:08:13,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:08:13,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:08:13,678 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 4 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:08:13,678 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845769539] [2020-12-23 01:08:13,679 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [445067658] [2020-12-23 01:08:13,679 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 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:08:13,774 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-12-23 01:08:13,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:08:13,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 33 conjunts are in the unsatisfiable core [2020-12-23 01:08:13,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:08:14,015 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 15 treesize of output 11 [2020-12-23 01:08:14,016 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:08:14,023 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:08:14,024 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 01:08:14,024 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:22, output treesize:15 [2020-12-23 01:08:14,450 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 01:08:14,454 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 01:08:14,458 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 01:08:14,460 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 01:08:14,462 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-23 01:08:14,508 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 14 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:08:14,508 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:08:14,508 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 31 [2020-12-23 01:08:14,509 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232178289] [2020-12-23 01:08:14,509 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-12-23 01:08:14,509 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:08:14,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-12-23 01:08:14,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=810, Unknown=0, NotChecked=0, Total=930 [2020-12-23 01:08:14,511 INFO L87 Difference]: Start difference. First operand 38 states and 40 transitions. Second operand 31 states. [2020-12-23 01:08:15,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:08:15,387 INFO L93 Difference]: Finished difference Result 59 states and 62 transitions. [2020-12-23 01:08:15,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-23 01:08:15,388 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 35 [2020-12-23 01:08:15,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:08:15,390 INFO L225 Difference]: With dead ends: 59 [2020-12-23 01:08:15,390 INFO L226 Difference]: Without dead ends: 40 [2020-12-23 01:08:15,394 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=196, Invalid=1210, Unknown=0, NotChecked=0, Total=1406 [2020-12-23 01:08:15,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-12-23 01:08:15,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2020-12-23 01:08:15,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-12-23 01:08:15,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 41 transitions. [2020-12-23 01:08:15,415 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 41 transitions. Word has length 35 [2020-12-23 01:08:15,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:08:15,416 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 41 transitions. [2020-12-23 01:08:15,416 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-12-23 01:08:15,416 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 41 transitions. [2020-12-23 01:08:15,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-12-23 01:08:15,418 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:08:15,418 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2020-12-23 01:08:15,637 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-12-23 01:08:15,638 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:08:15,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:08:15,638 INFO L82 PathProgramCache]: Analyzing trace with hash -1080336719, now seen corresponding path program 3 times [2020-12-23 01:08:15,639 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:08:15,639 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972201307] [2020-12-23 01:08:15,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:08:15,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:08:15,739 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-12-23 01:08:15,740 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972201307] [2020-12-23 01:08:15,740 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [247480805] [2020-12-23 01:08:15,740 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 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:08:15,828 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-12-23 01:08:15,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:08:15,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-23 01:08:15,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:08:15,995 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-12-23 01:08:15,995 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:08:15,996 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2020-12-23 01:08:15,996 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260888308] [2020-12-23 01:08:15,996 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-23 01:08:15,997 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:08:15,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-23 01:08:15,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=157, Unknown=0, NotChecked=0, Total=272 [2020-12-23 01:08:15,998 INFO L87 Difference]: Start difference. First operand 39 states and 41 transitions. Second operand 17 states. [2020-12-23 01:08:16,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:08:16,099 INFO L93 Difference]: Finished difference Result 77 states and 81 transitions. [2020-12-23 01:08:16,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-23 01:08:16,100 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 37 [2020-12-23 01:08:16,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:08:16,100 INFO L225 Difference]: With dead ends: 77 [2020-12-23 01:08:16,101 INFO L226 Difference]: Without dead ends: 60 [2020-12-23 01:08:16,101 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=115, Invalid=157, Unknown=0, NotChecked=0, Total=272 [2020-12-23 01:08:16,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-12-23 01:08:16,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 41. [2020-12-23 01:08:16,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-12-23 01:08:16,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 43 transitions. [2020-12-23 01:08:16,109 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 43 transitions. Word has length 37 [2020-12-23 01:08:16,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:08:16,109 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 43 transitions. [2020-12-23 01:08:16,109 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-23 01:08:16,109 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 43 transitions. [2020-12-23 01:08:16,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-12-23 01:08:16,110 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:08:16,110 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2020-12-23 01:08:16,324 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:08:16,324 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:08:16,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:08:16,325 INFO L82 PathProgramCache]: Analyzing trace with hash -1821925934, now seen corresponding path program 7 times [2020-12-23 01:08:16,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:08:16,325 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877152712] [2020-12-23 01:08:16,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:08:16,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:08:16,682 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 75 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:08:16,683 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877152712] [2020-12-23 01:08:16,683 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1817303590] [2020-12-23 01:08:16,683 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:08:16,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:08:16,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 38 conjunts are in the unsatisfiable core [2020-12-23 01:08:16,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:08:16,800 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 15 treesize of output 11 [2020-12-23 01:08:16,801 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:08:16,808 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:08:16,813 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 01:08:16,813 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2020-12-23 01:08:16,879 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:08:16,880 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 62 [2020-12-23 01:08:16,881 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 01:08:16,883 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:08:16,910 INFO L625 ElimStorePlain]: treesize reduction 28, result has 54.8 percent of original size [2020-12-23 01:08:16,913 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-23 01:08:16,913 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:38, output treesize:18 [2020-12-23 01:08:17,118 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 01:08:17,120 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 01:08:17,153 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 75 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:08:17,153 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:08:17,154 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 25 [2020-12-23 01:08:17,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652697923] [2020-12-23 01:08:17,154 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-12-23 01:08:17,154 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:08:17,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-12-23 01:08:17,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=535, Unknown=0, NotChecked=0, Total=600 [2020-12-23 01:08:17,156 INFO L87 Difference]: Start difference. First operand 41 states and 43 transitions. Second operand 25 states. [2020-12-23 01:08:17,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:08:17,936 INFO L93 Difference]: Finished difference Result 50 states and 52 transitions. [2020-12-23 01:08:17,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-23 01:08:17,937 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 38 [2020-12-23 01:08:17,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:08:17,938 INFO L225 Difference]: With dead ends: 50 [2020-12-23 01:08:17,938 INFO L226 Difference]: Without dead ends: 48 [2020-12-23 01:08:17,939 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 29 SyntacticMatches, 4 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=180, Invalid=1226, Unknown=0, NotChecked=0, Total=1406 [2020-12-23 01:08:17,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-12-23 01:08:17,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 45. [2020-12-23 01:08:17,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-12-23 01:08:17,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 47 transitions. [2020-12-23 01:08:17,947 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 47 transitions. Word has length 38 [2020-12-23 01:08:17,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:08:17,947 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 47 transitions. [2020-12-23 01:08:17,948 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-12-23 01:08:17,948 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 47 transitions. [2020-12-23 01:08:17,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-12-23 01:08:17,948 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:08:17,948 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2020-12-23 01:08:18,161 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-23 01:08:18,162 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:08:18,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:08:18,163 INFO L82 PathProgramCache]: Analyzing trace with hash 1086466440, now seen corresponding path program 8 times [2020-12-23 01:08:18,163 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:08:18,163 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83615710] [2020-12-23 01:08:18,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:08:18,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:08:18,610 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 12 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:08:18,611 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83615710] [2020-12-23 01:08:18,611 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [931104113] [2020-12-23 01:08:18,611 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:08:18,674 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 01:08:18,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:08:18,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 37 conjunts are in the unsatisfiable core [2020-12-23 01:08:18,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:08:19,000 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 15 treesize of output 11 [2020-12-23 01:08:19,001 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:08:19,007 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:08:19,008 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 01:08:19,009 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:22, output treesize:15 [2020-12-23 01:08:19,553 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 01:08:19,555 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 01:08:19,558 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 01:08:19,561 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 01:08:19,563 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-23 01:08:19,611 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 25 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:08:19,612 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:08:19,612 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 37 [2020-12-23 01:08:19,612 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680610141] [2020-12-23 01:08:19,613 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-12-23 01:08:19,613 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:08:19,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-12-23 01:08:19,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=1182, Unknown=0, NotChecked=0, Total=1332 [2020-12-23 01:08:19,614 INFO L87 Difference]: Start difference. First operand 45 states and 47 transitions. Second operand 37 states. [2020-12-23 01:08:20,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:08:20,959 INFO L93 Difference]: Finished difference Result 70 states and 73 transitions. [2020-12-23 01:08:20,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-12-23 01:08:20,959 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 42 [2020-12-23 01:08:20,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:08:20,960 INFO L225 Difference]: With dead ends: 70 [2020-12-23 01:08:20,960 INFO L226 Difference]: Without dead ends: 47 [2020-12-23 01:08:20,961 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 375 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=275, Invalid=1887, Unknown=0, NotChecked=0, Total=2162 [2020-12-23 01:08:20,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-12-23 01:08:20,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2020-12-23 01:08:20,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-12-23 01:08:20,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 48 transitions. [2020-12-23 01:08:20,974 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 48 transitions. Word has length 42 [2020-12-23 01:08:20,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:08:20,975 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 48 transitions. [2020-12-23 01:08:20,975 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-12-23 01:08:20,975 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 48 transitions. [2020-12-23 01:08:20,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-12-23 01:08:20,976 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:08:20,976 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2020-12-23 01:08:21,190 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:08:21,191 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:08:21,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:08:21,192 INFO L82 PathProgramCache]: Analyzing trace with hash -1187871967, now seen corresponding path program 4 times [2020-12-23 01:08:21,192 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:08:21,192 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13695303] [2020-12-23 01:08:21,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:08:21,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:08:21,295 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2020-12-23 01:08:21,298 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13695303] [2020-12-23 01:08:21,298 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1522794711] [2020-12-23 01:08:21,298 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 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 01:08:21,356 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 01:08:21,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:08:21,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 43 conjunts are in the unsatisfiable core [2020-12-23 01:08:21,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:08:21,568 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 15 treesize of output 11 [2020-12-23 01:08:21,569 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:08:21,576 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:08:21,577 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 01:08:21,577 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:24, output treesize:17 [2020-12-23 01:08:21,655 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:08:21,655 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 54 [2020-12-23 01:08:21,657 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 01:08:21,659 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:08:21,679 INFO L625 ElimStorePlain]: treesize reduction 22, result has 52.2 percent of original size [2020-12-23 01:08:21,681 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 01:08:21,681 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:28, output treesize:9 [2020-12-23 01:08:21,956 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 01:08:21,958 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 01:08:21,996 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 102 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:08:21,996 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:08:21,996 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 22] total 31 [2020-12-23 01:08:21,997 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040217286] [2020-12-23 01:08:21,997 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-12-23 01:08:21,997 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:08:21,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-12-23 01:08:21,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=829, Unknown=0, NotChecked=0, Total=930 [2020-12-23 01:08:21,998 INFO L87 Difference]: Start difference. First operand 46 states and 48 transitions. Second operand 31 states. [2020-12-23 01:08:23,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:08:23,701 INFO L93 Difference]: Finished difference Result 106 states and 112 transitions. [2020-12-23 01:08:23,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-12-23 01:08:23,702 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 44 [2020-12-23 01:08:23,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:08:23,702 INFO L225 Difference]: With dead ends: 106 [2020-12-23 01:08:23,702 INFO L226 Difference]: Without dead ends: 85 [2020-12-23 01:08:23,704 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 987 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=439, Invalid=3721, Unknown=0, NotChecked=0, Total=4160 [2020-12-23 01:08:23,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-12-23 01:08:23,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 52. [2020-12-23 01:08:23,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-12-23 01:08:23,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 54 transitions. [2020-12-23 01:08:23,713 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 54 transitions. Word has length 44 [2020-12-23 01:08:23,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:08:23,713 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 54 transitions. [2020-12-23 01:08:23,713 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-12-23 01:08:23,713 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 54 transitions. [2020-12-23 01:08:23,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-12-23 01:08:23,714 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:08:23,714 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1] [2020-12-23 01:08:23,929 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:08:23,930 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:08:23,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:08:23,931 INFO L82 PathProgramCache]: Analyzing trace with hash -707076540, now seen corresponding path program 9 times [2020-12-23 01:08:23,931 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:08:23,931 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555358178] [2020-12-23 01:08:23,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:08:23,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:08:24,581 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 24 proven. 103 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:08:24,581 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555358178] [2020-12-23 01:08:24,581 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [544834618] [2020-12-23 01:08:24,581 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 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 01:08:24,725 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-12-23 01:08:24,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:08:24,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 42 conjunts are in the unsatisfiable core [2020-12-23 01:08:24,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:08:25,182 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 15 treesize of output 11 [2020-12-23 01:08:25,183 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:08:25,189 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:08:25,190 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 01:08:25,190 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:22, output treesize:15 [2020-12-23 01:08:25,865 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 01:08:25,867 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 01:08:25,870 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 01:08:25,872 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 01:08:25,873 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-23 01:08:25,930 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 41 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:08:25,930 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:08:25,931 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 25] total 43 [2020-12-23 01:08:25,931 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310827110] [2020-12-23 01:08:25,931 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-12-23 01:08:25,931 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:08:25,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-12-23 01:08:25,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=1621, Unknown=0, NotChecked=0, Total=1806 [2020-12-23 01:08:25,933 INFO L87 Difference]: Start difference. First operand 52 states and 54 transitions. Second operand 43 states. [2020-12-23 01:08:27,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:08:27,586 INFO L93 Difference]: Finished difference Result 81 states and 84 transitions. [2020-12-23 01:08:27,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-12-23 01:08:27,587 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 49 [2020-12-23 01:08:27,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:08:27,588 INFO L225 Difference]: With dead ends: 81 [2020-12-23 01:08:27,588 INFO L226 Difference]: Without dead ends: 54 [2020-12-23 01:08:27,589 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 529 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=354, Invalid=2616, Unknown=0, NotChecked=0, Total=2970 [2020-12-23 01:08:27,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-12-23 01:08:27,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2020-12-23 01:08:27,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-12-23 01:08:27,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 55 transitions. [2020-12-23 01:08:27,602 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 55 transitions. Word has length 49 [2020-12-23 01:08:27,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:08:27,602 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 55 transitions. [2020-12-23 01:08:27,602 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-12-23 01:08:27,602 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 55 transitions. [2020-12-23 01:08:27,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-12-23 01:08:27,604 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:08:27,604 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1] [2020-12-23 01:08:27,805 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-12-23 01:08:27,805 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:08:27,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:08:27,806 INFO L82 PathProgramCache]: Analyzing trace with hash 1660279261, now seen corresponding path program 5 times [2020-12-23 01:08:27,806 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:08:27,806 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658198859] [2020-12-23 01:08:27,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:08:27,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:08:27,912 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2020-12-23 01:08:27,913 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658198859] [2020-12-23 01:08:27,913 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [851767662] [2020-12-23 01:08:27,913 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 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 01:08:28,016 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-12-23 01:08:28,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:08:28,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-23 01:08:28,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:08:28,232 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2020-12-23 01:08:28,233 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:08:28,233 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2020-12-23 01:08:28,234 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342697565] [2020-12-23 01:08:28,234 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-23 01:08:28,234 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:08:28,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-23 01:08:28,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=246, Unknown=0, NotChecked=0, Total=420 [2020-12-23 01:08:28,235 INFO L87 Difference]: Start difference. First operand 53 states and 55 transitions. Second operand 21 states. [2020-12-23 01:08:28,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:08:28,345 INFO L93 Difference]: Finished difference Result 107 states and 111 transitions. [2020-12-23 01:08:28,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-23 01:08:28,349 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 51 [2020-12-23 01:08:28,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:08:28,350 INFO L225 Difference]: With dead ends: 107 [2020-12-23 01:08:28,350 INFO L226 Difference]: Without dead ends: 82 [2020-12-23 01:08:28,354 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=174, Invalid=246, Unknown=0, NotChecked=0, Total=420 [2020-12-23 01:08:28,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-12-23 01:08:28,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 55. [2020-12-23 01:08:28,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-12-23 01:08:28,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 57 transitions. [2020-12-23 01:08:28,365 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 57 transitions. Word has length 51 [2020-12-23 01:08:28,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:08:28,366 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 57 transitions. [2020-12-23 01:08:28,366 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-23 01:08:28,366 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 57 transitions. [2020-12-23 01:08:28,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-12-23 01:08:28,366 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:08:28,366 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 8, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1] [2020-12-23 01:08:28,567 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:08:28,567 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:08:28,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:08:28,567 INFO L82 PathProgramCache]: Analyzing trace with hash -988666754, now seen corresponding path program 10 times [2020-12-23 01:08:28,568 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:08:28,568 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520078754] [2020-12-23 01:08:28,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:08:28,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:08:29,146 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 0 proven. 150 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:08:29,147 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520078754] [2020-12-23 01:08:29,147 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [279817652] [2020-12-23 01:08:29,147 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:08:29,202 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 01:08:29,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:08:29,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 48 conjunts are in the unsatisfiable core [2020-12-23 01:08:29,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:08:29,260 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 15 treesize of output 11 [2020-12-23 01:08:29,261 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:08:29,268 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:08:29,269 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 01:08:29,269 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2020-12-23 01:08:29,345 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:08:29,346 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 62 [2020-12-23 01:08:29,348 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 01:08:29,350 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:08:29,376 INFO L625 ElimStorePlain]: treesize reduction 28, result has 54.8 percent of original size [2020-12-23 01:08:29,379 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-23 01:08:29,379 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:38, output treesize:18 [2020-12-23 01:08:29,725 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 01:08:29,730 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 01:08:29,787 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 0 proven. 150 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:08:29,788 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:08:29,788 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 33 [2020-12-23 01:08:29,788 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762698826] [2020-12-23 01:08:29,788 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-12-23 01:08:29,789 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:08:29,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-12-23 01:08:29,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=969, Unknown=0, NotChecked=0, Total=1056 [2020-12-23 01:08:29,790 INFO L87 Difference]: Start difference. First operand 55 states and 57 transitions. Second operand 33 states. [2020-12-23 01:08:31,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:08:31,228 INFO L93 Difference]: Finished difference Result 64 states and 66 transitions. [2020-12-23 01:08:31,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-12-23 01:08:31,229 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 52 [2020-12-23 01:08:31,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:08:31,229 INFO L225 Difference]: With dead ends: 64 [2020-12-23 01:08:31,230 INFO L226 Difference]: Without dead ends: 62 [2020-12-23 01:08:31,231 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 534 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=236, Invalid=2214, Unknown=0, NotChecked=0, Total=2450 [2020-12-23 01:08:31,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-12-23 01:08:31,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 59. [2020-12-23 01:08:31,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-12-23 01:08:31,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 61 transitions. [2020-12-23 01:08:31,241 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 61 transitions. Word has length 52 [2020-12-23 01:08:31,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:08:31,242 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 61 transitions. [2020-12-23 01:08:31,242 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-12-23 01:08:31,242 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 61 transitions. [2020-12-23 01:08:31,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-12-23 01:08:31,242 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:08:31,243 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1] [2020-12-23 01:08:31,456 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-12-23 01:08:31,457 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:08:31,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:08:31,457 INFO L82 PathProgramCache]: Analyzing trace with hash -147752396, now seen corresponding path program 11 times [2020-12-23 01:08:31,458 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:08:31,458 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928453596] [2020-12-23 01:08:31,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:08:31,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:08:32,166 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 40 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:08:32,167 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928453596] [2020-12-23 01:08:32,167 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [45857568] [2020-12-23 01:08:32,167 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 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 01:08:32,269 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-12-23 01:08:32,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:08:32,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 51 conjunts are in the unsatisfiable core [2020-12-23 01:08:32,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:08:32,947 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 13 treesize of output 9 [2020-12-23 01:08:32,948 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:08:32,954 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:08:32,954 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 01:08:32,957 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:17, output treesize:9 [2020-12-23 01:08:33,591 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 01:08:33,595 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 01:08:33,663 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 0 proven. 172 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:08:33,664 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:08:33,664 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26] total 50 [2020-12-23 01:08:33,664 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862433976] [2020-12-23 01:08:33,664 INFO L461 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-12-23 01:08:33,664 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:08:33,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-12-23 01:08:33,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=2274, Unknown=0, NotChecked=0, Total=2450 [2020-12-23 01:08:33,666 INFO L87 Difference]: Start difference. First operand 59 states and 61 transitions. Second operand 50 states. [2020-12-23 01:08:35,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:08:35,890 INFO L93 Difference]: Finished difference Result 96 states and 100 transitions. [2020-12-23 01:08:35,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-12-23 01:08:35,891 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 56 [2020-12-23 01:08:35,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:08:35,892 INFO L225 Difference]: With dead ends: 96 [2020-12-23 01:08:35,892 INFO L226 Difference]: Without dead ends: 61 [2020-12-23 01:08:35,894 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 921 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=372, Invalid=4320, Unknown=0, NotChecked=0, Total=4692 [2020-12-23 01:08:35,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-12-23 01:08:35,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 60. [2020-12-23 01:08:35,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-12-23 01:08:35,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 62 transitions. [2020-12-23 01:08:35,903 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 62 transitions. Word has length 56 [2020-12-23 01:08:35,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:08:35,903 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 62 transitions. [2020-12-23 01:08:35,903 INFO L482 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-12-23 01:08:35,903 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 62 transitions. [2020-12-23 01:08:35,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-12-23 01:08:35,904 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:08:35,904 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1] [2020-12-23 01:08:36,117 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-12-23 01:08:36,118 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:08:36,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:08:36,119 INFO L82 PathProgramCache]: Analyzing trace with hash 1103207117, now seen corresponding path program 6 times [2020-12-23 01:08:36,119 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:08:36,119 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166182049] [2020-12-23 01:08:36,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:08:36,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:08:36,261 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2020-12-23 01:08:36,261 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166182049] [2020-12-23 01:08:36,261 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [698895483] [2020-12-23 01:08:36,261 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 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:08:36,478 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-12-23 01:08:36,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:08:36,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-23 01:08:36,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:08:36,714 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2020-12-23 01:08:36,715 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:08:36,715 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2020-12-23 01:08:36,715 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397891939] [2020-12-23 01:08:36,716 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-12-23 01:08:36,716 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:08:36,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-12-23 01:08:36,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=298, Unknown=0, NotChecked=0, Total=506 [2020-12-23 01:08:36,717 INFO L87 Difference]: Start difference. First operand 60 states and 62 transitions. Second operand 23 states. [2020-12-23 01:08:36,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:08:36,828 INFO L93 Difference]: Finished difference Result 122 states and 126 transitions. [2020-12-23 01:08:36,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-23 01:08:36,829 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 58 [2020-12-23 01:08:36,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:08:36,830 INFO L225 Difference]: With dead ends: 122 [2020-12-23 01:08:36,830 INFO L226 Difference]: Without dead ends: 93 [2020-12-23 01:08:36,830 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=208, Invalid=298, Unknown=0, NotChecked=0, Total=506 [2020-12-23 01:08:36,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-12-23 01:08:36,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 62. [2020-12-23 01:08:36,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-12-23 01:08:36,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 64 transitions. [2020-12-23 01:08:36,841 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 64 transitions. Word has length 58 [2020-12-23 01:08:36,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:08:36,841 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 64 transitions. [2020-12-23 01:08:36,841 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-12-23 01:08:36,842 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 64 transitions. [2020-12-23 01:08:36,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-12-23 01:08:36,842 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:08:36,842 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 9, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1] [2020-12-23 01:08:37,056 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:08:37,056 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:08:37,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:08:37,057 INFO L82 PathProgramCache]: Analyzing trace with hash -412901702, now seen corresponding path program 12 times [2020-12-23 01:08:37,058 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:08:37,058 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950011944] [2020-12-23 01:08:37,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:08:37,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:08:37,727 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 198 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:08:37,727 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950011944] [2020-12-23 01:08:37,727 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1509723516] [2020-12-23 01:08:37,727 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 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:08:38,036 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-12-23 01:08:38,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:08:38,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 52 conjunts are in the unsatisfiable core [2020-12-23 01:08:38,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:08:38,347 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 15 treesize of output 11 [2020-12-23 01:08:38,348 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:08:38,356 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:08:38,358 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 01:08:38,358 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:24, output treesize:17 [2020-12-23 01:08:38,503 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:08:38,503 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 56 [2020-12-23 01:08:38,505 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 01:08:38,507 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:08:38,530 INFO L625 ElimStorePlain]: treesize reduction 22, result has 54.2 percent of original size [2020-12-23 01:08:38,531 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 01:08:38,531 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:23 [2020-12-23 01:08:38,725 INFO L348 Elim1Store]: treesize reduction 12, result has 86.8 percent of original size [2020-12-23 01:08:38,726 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 95 [2020-12-23 01:08:38,728 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 01:08:38,729 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 01:08:38,731 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:08:38,761 INFO L625 ElimStorePlain]: treesize reduction 43, result has 42.7 percent of original size [2020-12-23 01:08:38,762 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 01:08:38,762 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:21 [2020-12-23 01:08:39,303 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 01:08:39,571 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 01:08:39,574 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 01:08:39,650 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 198 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:08:39,650 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:08:39,651 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 24] total 50 [2020-12-23 01:08:39,651 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140858175] [2020-12-23 01:08:39,651 INFO L461 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-12-23 01:08:39,651 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:08:39,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-12-23 01:08:39,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=2314, Unknown=0, NotChecked=0, Total=2450 [2020-12-23 01:08:39,653 INFO L87 Difference]: Start difference. First operand 62 states and 64 transitions. Second operand 50 states. [2020-12-23 01:08:42,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:08:42,311 INFO L93 Difference]: Finished difference Result 71 states and 73 transitions. [2020-12-23 01:08:42,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-12-23 01:08:42,312 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 59 [2020-12-23 01:08:42,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:08:42,312 INFO L225 Difference]: With dead ends: 71 [2020-12-23 01:08:42,313 INFO L226 Difference]: Without dead ends: 69 [2020-12-23 01:08:42,315 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 905 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=337, Invalid=4493, Unknown=0, NotChecked=0, Total=4830 [2020-12-23 01:08:42,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-12-23 01:08:42,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 66. [2020-12-23 01:08:42,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-12-23 01:08:42,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 68 transitions. [2020-12-23 01:08:42,324 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 68 transitions. Word has length 59 [2020-12-23 01:08:42,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:08:42,324 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 68 transitions. [2020-12-23 01:08:42,324 INFO L482 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-12-23 01:08:42,324 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 68 transitions. [2020-12-23 01:08:42,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-12-23 01:08:42,324 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:08:42,324 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1] [2020-12-23 01:08:42,525 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-12-23 01:08:42,525 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:08:42,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:08:42,526 INFO L82 PathProgramCache]: Analyzing trace with hash 1132689008, now seen corresponding path program 13 times [2020-12-23 01:08:42,526 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:08:42,526 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566936424] [2020-12-23 01:08:42,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:08:42,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:08:43,455 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 60 proven. 164 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:08:43,455 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566936424] [2020-12-23 01:08:43,455 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [711544499] [2020-12-23 01:08:43,455 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 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:08:43,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:08:43,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 56 conjunts are in the unsatisfiable core [2020-12-23 01:08:43,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:08:44,401 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 13 treesize of output 9 [2020-12-23 01:08:44,402 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:08:44,408 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:08:44,409 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 01:08:44,409 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:17, output treesize:9 [2020-12-23 01:08:45,200 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 01:08:45,202 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 01:08:45,286 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 0 proven. 224 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:08:45,286 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:08:45,286 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29] total 56 [2020-12-23 01:08:45,286 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325419830] [2020-12-23 01:08:45,287 INFO L461 AbstractCegarLoop]: Interpolant automaton has 56 states [2020-12-23 01:08:45,287 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:08:45,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2020-12-23 01:08:45,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=2878, Unknown=0, NotChecked=0, Total=3080 [2020-12-23 01:08:45,289 INFO L87 Difference]: Start difference. First operand 66 states and 68 transitions. Second operand 56 states. [2020-12-23 01:08:47,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:08:47,957 INFO L93 Difference]: Finished difference Result 107 states and 111 transitions. [2020-12-23 01:08:47,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-12-23 01:08:47,958 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 63 [2020-12-23 01:08:47,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:08:47,959 INFO L225 Difference]: With dead ends: 107 [2020-12-23 01:08:47,959 INFO L226 Difference]: Without dead ends: 68 [2020-12-23 01:08:47,962 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1173 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=424, Invalid=5428, Unknown=0, NotChecked=0, Total=5852 [2020-12-23 01:08:47,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-12-23 01:08:47,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 67. [2020-12-23 01:08:47,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-12-23 01:08:47,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 69 transitions. [2020-12-23 01:08:47,972 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 69 transitions. Word has length 63 [2020-12-23 01:08:47,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:08:47,972 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 69 transitions. [2020-12-23 01:08:47,972 INFO L482 AbstractCegarLoop]: Interpolant automaton has 56 states. [2020-12-23 01:08:47,972 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 69 transitions. [2020-12-23 01:08:47,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-12-23 01:08:47,973 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:08:47,973 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1] [2020-12-23 01:08:48,176 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:08:48,176 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:08:48,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:08:48,177 INFO L82 PathProgramCache]: Analyzing trace with hash -1692837623, now seen corresponding path program 7 times [2020-12-23 01:08:48,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:08:48,178 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098898761] [2020-12-23 01:08:48,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:08:48,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:08:48,341 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2020-12-23 01:08:48,342 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098898761] [2020-12-23 01:08:48,342 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1648446869] [2020-12-23 01:08:48,342 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 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:08:48,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:08:48,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 01:08:48,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:08:48,737 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2020-12-23 01:08:48,738 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:08:48,738 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2020-12-23 01:08:48,738 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533881824] [2020-12-23 01:08:48,738 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-12-23 01:08:48,739 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:08:48,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-12-23 01:08:48,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=245, Invalid=355, Unknown=0, NotChecked=0, Total=600 [2020-12-23 01:08:48,740 INFO L87 Difference]: Start difference. First operand 67 states and 69 transitions. Second operand 25 states. [2020-12-23 01:08:48,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:08:48,879 INFO L93 Difference]: Finished difference Result 137 states and 141 transitions. [2020-12-23 01:08:48,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-23 01:08:48,880 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 65 [2020-12-23 01:08:48,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:08:48,881 INFO L225 Difference]: With dead ends: 137 [2020-12-23 01:08:48,881 INFO L226 Difference]: Without dead ends: 104 [2020-12-23 01:08:48,882 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=245, Invalid=355, Unknown=0, NotChecked=0, Total=600 [2020-12-23 01:08:48,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-12-23 01:08:48,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 69. [2020-12-23 01:08:48,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-12-23 01:08:48,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 71 transitions. [2020-12-23 01:08:48,893 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 71 transitions. Word has length 65 [2020-12-23 01:08:48,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:08:48,894 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 71 transitions. [2020-12-23 01:08:48,894 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-12-23 01:08:48,894 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 71 transitions. [2020-12-23 01:08:48,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-23 01:08:48,895 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:08:48,895 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 10, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1] [2020-12-23 01:08:49,108 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-12-23 01:08:49,109 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:08:49,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:08:49,109 INFO L82 PathProgramCache]: Analyzing trace with hash 557731626, now seen corresponding path program 14 times [2020-12-23 01:08:49,110 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:08:49,110 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979238085] [2020-12-23 01:08:49,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:08:49,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:08:50,027 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:08:50,027 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979238085] [2020-12-23 01:08:50,027 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [17392426] [2020-12-23 01:08:50,028 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 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:08:50,115 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 01:08:50,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:08:50,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 58 conjunts are in the unsatisfiable core [2020-12-23 01:08:50,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:08:50,196 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 15 treesize of output 11 [2020-12-23 01:08:50,197 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:08:50,207 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:08:50,208 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 01:08:50,208 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2020-12-23 01:08:50,309 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:08:50,309 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 62 [2020-12-23 01:08:50,311 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 01:08:50,312 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:08:50,341 INFO L625 ElimStorePlain]: treesize reduction 28, result has 54.8 percent of original size [2020-12-23 01:08:50,343 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-23 01:08:50,343 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:38, output treesize:18 [2020-12-23 01:08:50,947 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 01:08:50,950 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 01:08:51,020 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:08:51,021 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:08:51,021 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 41 [2020-12-23 01:08:51,021 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607321411] [2020-12-23 01:08:51,021 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-12-23 01:08:51,021 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:08:51,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-12-23 01:08:51,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=1531, Unknown=0, NotChecked=0, Total=1640 [2020-12-23 01:08:51,022 INFO L87 Difference]: Start difference. First operand 69 states and 71 transitions. Second operand 41 states. [2020-12-23 01:08:53,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:08:53,268 INFO L93 Difference]: Finished difference Result 78 states and 80 transitions. [2020-12-23 01:08:53,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-12-23 01:08:53,269 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 66 [2020-12-23 01:08:53,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:08:53,270 INFO L225 Difference]: With dead ends: 78 [2020-12-23 01:08:53,270 INFO L226 Difference]: Without dead ends: 76 [2020-12-23 01:08:53,272 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 53 SyntacticMatches, 4 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 859 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=292, Invalid=3490, Unknown=0, NotChecked=0, Total=3782 [2020-12-23 01:08:53,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-12-23 01:08:53,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 73. [2020-12-23 01:08:53,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-12-23 01:08:53,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 75 transitions. [2020-12-23 01:08:53,281 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 75 transitions. Word has length 66 [2020-12-23 01:08:53,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:08:53,281 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 75 transitions. [2020-12-23 01:08:53,281 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-12-23 01:08:53,281 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 75 transitions. [2020-12-23 01:08:53,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-12-23 01:08:53,282 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:08:53,282 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 10, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1] [2020-12-23 01:08:53,482 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-12-23 01:08:53,482 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:08:53,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:08:53,483 INFO L82 PathProgramCache]: Analyzing trace with hash -1229951264, now seen corresponding path program 15 times [2020-12-23 01:08:53,483 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:08:53,484 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440722992] [2020-12-23 01:08:53,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:08:53,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:08:54,630 INFO L134 CoverageAnalysis]: Checked inductivity of 283 backedges. 84 proven. 199 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:08:54,633 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440722992] [2020-12-23 01:08:54,633 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1309932313] [2020-12-23 01:08:54,633 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 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:08:54,969 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2020-12-23 01:08:54,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:08:54,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 56 conjunts are in the unsatisfiable core [2020-12-23 01:08:54,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:08:56,066 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 15 treesize of output 11 [2020-12-23 01:08:56,067 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:08:56,074 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:08:56,075 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 01:08:56,075 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:22, output treesize:15 [2020-12-23 01:08:57,485 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 01:08:57,486 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 01:08:57,488 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 01:08:57,490 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 01:08:57,491 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-23 01:08:57,581 INFO L134 CoverageAnalysis]: Checked inductivity of 283 backedges. 116 proven. 167 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:08:57,581 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:08:57,582 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 61 [2020-12-23 01:08:57,582 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490919049] [2020-12-23 01:08:57,582 INFO L461 AbstractCegarLoop]: Interpolant automaton has 61 states [2020-12-23 01:08:57,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:08:57,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2020-12-23 01:08:57,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=312, Invalid=3348, Unknown=0, NotChecked=0, Total=3660 [2020-12-23 01:08:57,584 INFO L87 Difference]: Start difference. First operand 73 states and 75 transitions. Second operand 61 states. [2020-12-23 01:09:00,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:09:00,687 INFO L93 Difference]: Finished difference Result 114 states and 117 transitions. [2020-12-23 01:09:00,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-12-23 01:09:00,688 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 70 [2020-12-23 01:09:00,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:09:00,689 INFO L225 Difference]: With dead ends: 114 [2020-12-23 01:09:00,689 INFO L226 Difference]: Without dead ends: 75 [2020-12-23 01:09:00,691 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1035 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=594, Invalid=5106, Unknown=0, NotChecked=0, Total=5700 [2020-12-23 01:09:00,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-12-23 01:09:00,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 74. [2020-12-23 01:09:00,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-12-23 01:09:00,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 76 transitions. [2020-12-23 01:09:00,703 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 76 transitions. Word has length 70 [2020-12-23 01:09:00,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:09:00,703 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 76 transitions. [2020-12-23 01:09:00,703 INFO L482 AbstractCegarLoop]: Interpolant automaton has 61 states. [2020-12-23 01:09:00,703 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 76 transitions. [2020-12-23 01:09:00,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-12-23 01:09:00,704 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:09:00,704 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1] [2020-12-23 01:09:00,920 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:09:00,921 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:09:00,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:09:00,922 INFO L82 PathProgramCache]: Analyzing trace with hash 832919161, now seen corresponding path program 8 times [2020-12-23 01:09:00,922 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:09:00,922 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282892645] [2020-12-23 01:09:00,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:09:00,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:09:01,111 INFO L134 CoverageAnalysis]: Checked inductivity of 304 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2020-12-23 01:09:01,111 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282892645] [2020-12-23 01:09:01,112 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [121768760] [2020-12-23 01:09:01,112 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 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:09:01,221 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 01:09:01,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:09:01,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-23 01:09:01,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:09:01,568 INFO L134 CoverageAnalysis]: Checked inductivity of 304 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2020-12-23 01:09:01,568 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:09:01,568 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2020-12-23 01:09:01,569 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607045159] [2020-12-23 01:09:01,569 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-12-23 01:09:01,569 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:09:01,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-12-23 01:09:01,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=285, Invalid=417, Unknown=0, NotChecked=0, Total=702 [2020-12-23 01:09:01,570 INFO L87 Difference]: Start difference. First operand 74 states and 76 transitions. Second operand 27 states. [2020-12-23 01:09:01,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:09:01,733 INFO L93 Difference]: Finished difference Result 152 states and 156 transitions. [2020-12-23 01:09:01,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-23 01:09:01,734 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 72 [2020-12-23 01:09:01,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:09:01,735 INFO L225 Difference]: With dead ends: 152 [2020-12-23 01:09:01,735 INFO L226 Difference]: Without dead ends: 115 [2020-12-23 01:09:01,736 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=285, Invalid=417, Unknown=0, NotChecked=0, Total=702 [2020-12-23 01:09:01,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-12-23 01:09:01,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 76. [2020-12-23 01:09:01,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-12-23 01:09:01,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 78 transitions. [2020-12-23 01:09:01,748 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 78 transitions. Word has length 72 [2020-12-23 01:09:01,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:09:01,748 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 78 transitions. [2020-12-23 01:09:01,748 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-12-23 01:09:01,749 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 78 transitions. [2020-12-23 01:09:01,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-12-23 01:09:01,749 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:09:01,749 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 11, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1] [2020-12-23 01:09:01,964 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:09:01,964 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:09:01,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:09:01,965 INFO L82 PathProgramCache]: Analyzing trace with hash 1261252838, now seen corresponding path program 16 times [2020-12-23 01:09:01,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:09:01,966 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764906776] [2020-12-23 01:09:01,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:09:02,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:09:03,024 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 0 proven. 315 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:09:03,024 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764906776] [2020-12-23 01:09:03,024 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2010029951] [2020-12-23 01:09:03,024 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 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:09:03,097 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 01:09:03,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:09:03,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 63 conjunts are in the unsatisfiable core [2020-12-23 01:09:03,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:09:03,177 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 15 treesize of output 11 [2020-12-23 01:09:03,177 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:09:03,187 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:09:03,188 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 01:09:03,189 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2020-12-23 01:09:03,290 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:09:03,290 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 62 [2020-12-23 01:09:03,292 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 01:09:03,294 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:09:03,322 INFO L625 ElimStorePlain]: treesize reduction 28, result has 54.8 percent of original size [2020-12-23 01:09:03,324 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-23 01:09:03,325 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:38, output treesize:18 [2020-12-23 01:09:04,027 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 01:09:04,028 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 01:09:04,103 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 0 proven. 315 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:09:04,103 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:09:04,103 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 45 [2020-12-23 01:09:04,104 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842764701] [2020-12-23 01:09:04,104 INFO L461 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-12-23 01:09:04,104 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:09:04,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-12-23 01:09:04,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1860, Unknown=0, NotChecked=0, Total=1980 [2020-12-23 01:09:04,105 INFO L87 Difference]: Start difference. First operand 76 states and 78 transitions. Second operand 45 states. [2020-12-23 01:09:06,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:09:06,811 INFO L93 Difference]: Finished difference Result 85 states and 87 transitions. [2020-12-23 01:09:06,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-12-23 01:09:06,812 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 73 [2020-12-23 01:09:06,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:09:06,812 INFO L225 Difference]: With dead ends: 85 [2020-12-23 01:09:06,812 INFO L226 Difference]: Without dead ends: 83 [2020-12-23 01:09:06,813 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 59 SyntacticMatches, 4 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1050 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=320, Invalid=4236, Unknown=0, NotChecked=0, Total=4556 [2020-12-23 01:09:06,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-12-23 01:09:06,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 80. [2020-12-23 01:09:06,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-12-23 01:09:06,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 82 transitions. [2020-12-23 01:09:06,825 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 82 transitions. Word has length 73 [2020-12-23 01:09:06,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:09:06,825 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 82 transitions. [2020-12-23 01:09:06,825 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-12-23 01:09:06,825 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 82 transitions. [2020-12-23 01:09:06,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-12-23 01:09:06,826 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:09:06,826 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 11, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1] [2020-12-23 01:09:07,040 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2020-12-23 01:09:07,041 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:09:07,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:09:07,041 INFO L82 PathProgramCache]: Analyzing trace with hash -1499458916, now seen corresponding path program 17 times [2020-12-23 01:09:07,042 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:09:07,042 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532042876] [2020-12-23 01:09:07,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:09:07,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:09:08,419 INFO L134 CoverageAnalysis]: Checked inductivity of 349 backedges. 112 proven. 237 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:09:08,419 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532042876] [2020-12-23 01:09:08,419 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [413865851] [2020-12-23 01:09:08,420 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 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:09:08,558 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-12-23 01:09:08,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:09:08,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 66 conjunts are in the unsatisfiable core [2020-12-23 01:09:08,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:09:09,917 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 13 treesize of output 9 [2020-12-23 01:09:09,917 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:09:09,923 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:09:09,924 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 01:09:09,924 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:17, output treesize:9 [2020-12-23 01:09:11,136 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 01:09:11,139 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 01:09:11,233 INFO L134 CoverageAnalysis]: Checked inductivity of 349 backedges. 0 proven. 349 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:09:11,233 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:09:11,234 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 35] total 68 [2020-12-23 01:09:11,234 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794357701] [2020-12-23 01:09:11,234 INFO L461 AbstractCegarLoop]: Interpolant automaton has 68 states [2020-12-23 01:09:11,234 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:09:11,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2020-12-23 01:09:11,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=4299, Unknown=0, NotChecked=0, Total=4556 [2020-12-23 01:09:11,236 INFO L87 Difference]: Start difference. First operand 80 states and 82 transitions. Second operand 68 states. [2020-12-23 01:09:15,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:09:15,007 INFO L93 Difference]: Finished difference Result 129 states and 133 transitions. [2020-12-23 01:09:15,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-12-23 01:09:15,008 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 77 [2020-12-23 01:09:15,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:09:15,009 INFO L225 Difference]: With dead ends: 129 [2020-12-23 01:09:15,009 INFO L226 Difference]: Without dead ends: 82 [2020-12-23 01:09:15,010 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1740 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=546, Invalid=8010, Unknown=0, NotChecked=0, Total=8556 [2020-12-23 01:09:15,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-12-23 01:09:15,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 81. [2020-12-23 01:09:15,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-12-23 01:09:15,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 83 transitions. [2020-12-23 01:09:15,021 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 83 transitions. Word has length 77 [2020-12-23 01:09:15,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:09:15,022 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 83 transitions. [2020-12-23 01:09:15,022 INFO L482 AbstractCegarLoop]: Interpolant automaton has 68 states. [2020-12-23 01:09:15,022 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 83 transitions. [2020-12-23 01:09:15,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-23 01:09:15,022 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:09:15,023 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1] [2020-12-23 01:09:15,238 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:09:15,239 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:09:15,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:09:15,239 INFO L82 PathProgramCache]: Analyzing trace with hash -1604461515, now seen corresponding path program 9 times [2020-12-23 01:09:15,240 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:09:15,240 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677469974] [2020-12-23 01:09:15,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:09:15,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:09:15,449 INFO L134 CoverageAnalysis]: Checked inductivity of 372 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2020-12-23 01:09:15,450 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677469974] [2020-12-23 01:09:15,450 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1206020470] [2020-12-23 01:09:15,450 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 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:09:15,719 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2020-12-23 01:09:15,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:09:15,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-23 01:09:15,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:09:16,026 INFO L134 CoverageAnalysis]: Checked inductivity of 372 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2020-12-23 01:09:16,026 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:09:16,026 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2020-12-23 01:09:16,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303002807] [2020-12-23 01:09:16,027 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-12-23 01:09:16,027 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:09:16,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-12-23 01:09:16,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=328, Invalid=484, Unknown=0, NotChecked=0, Total=812 [2020-12-23 01:09:16,028 INFO L87 Difference]: Start difference. First operand 81 states and 83 transitions. Second operand 29 states. [2020-12-23 01:09:16,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:09:16,196 INFO L93 Difference]: Finished difference Result 167 states and 171 transitions. [2020-12-23 01:09:16,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-23 01:09:16,198 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 79 [2020-12-23 01:09:16,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:09:16,199 INFO L225 Difference]: With dead ends: 167 [2020-12-23 01:09:16,199 INFO L226 Difference]: Without dead ends: 126 [2020-12-23 01:09:16,199 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=328, Invalid=484, Unknown=0, NotChecked=0, Total=812 [2020-12-23 01:09:16,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-12-23 01:09:16,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 83. [2020-12-23 01:09:16,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-12-23 01:09:16,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 85 transitions. [2020-12-23 01:09:16,214 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 85 transitions. Word has length 79 [2020-12-23 01:09:16,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:09:16,214 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 85 transitions. [2020-12-23 01:09:16,214 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-12-23 01:09:16,214 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 85 transitions. [2020-12-23 01:09:16,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-12-23 01:09:16,215 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:09:16,215 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 12, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1] [2020-12-23 01:09:16,428 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2020-12-23 01:09:16,429 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:09:16,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:09:16,429 INFO L82 PathProgramCache]: Analyzing trace with hash 1642864086, now seen corresponding path program 18 times [2020-12-23 01:09:16,430 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:09:16,430 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492714599] [2020-12-23 01:09:16,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:09:16,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:09:17,591 INFO L134 CoverageAnalysis]: Checked inductivity of 384 backedges. 0 proven. 384 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:09:17,591 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492714599] [2020-12-23 01:09:17,592 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1524590075] [2020-12-23 01:09:17,592 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 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:09:17,891 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-12-23 01:09:17,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:09:17,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 68 conjunts are in the unsatisfiable core [2020-12-23 01:09:17,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:09:17,979 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 15 treesize of output 11 [2020-12-23 01:09:17,981 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:09:17,989 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:09:17,991 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 01:09:17,991 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2020-12-23 01:09:18,096 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:09:18,096 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 62 [2020-12-23 01:09:18,098 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 01:09:18,100 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:09:18,137 INFO L625 ElimStorePlain]: treesize reduction 28, result has 54.8 percent of original size [2020-12-23 01:09:18,139 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-23 01:09:18,140 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:38, output treesize:18 [2020-12-23 01:09:18,984 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 01:09:18,985 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 01:09:19,068 INFO L134 CoverageAnalysis]: Checked inductivity of 384 backedges. 0 proven. 384 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:09:19,069 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:09:19,069 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 49 [2020-12-23 01:09:19,069 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777590741] [2020-12-23 01:09:19,069 INFO L461 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-12-23 01:09:19,069 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:09:19,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-12-23 01:09:19,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=2220, Unknown=0, NotChecked=0, Total=2352 [2020-12-23 01:09:19,070 INFO L87 Difference]: Start difference. First operand 83 states and 85 transitions. Second operand 49 states. [2020-12-23 01:09:22,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:09:22,129 INFO L93 Difference]: Finished difference Result 92 states and 94 transitions. [2020-12-23 01:09:22,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-12-23 01:09:22,130 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 80 [2020-12-23 01:09:22,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:09:22,131 INFO L225 Difference]: With dead ends: 92 [2020-12-23 01:09:22,131 INFO L226 Difference]: Without dead ends: 90 [2020-12-23 01:09:22,132 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 65 SyntacticMatches, 4 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1258 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=351, Invalid=5051, Unknown=0, NotChecked=0, Total=5402 [2020-12-23 01:09:22,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-12-23 01:09:22,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 87. [2020-12-23 01:09:22,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-12-23 01:09:22,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 89 transitions. [2020-12-23 01:09:22,143 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 89 transitions. Word has length 80 [2020-12-23 01:09:22,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:09:22,144 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 89 transitions. [2020-12-23 01:09:22,144 INFO L482 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-12-23 01:09:22,144 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 89 transitions. [2020-12-23 01:09:22,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-12-23 01:09:22,144 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:09:22,144 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 12, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1] [2020-12-23 01:09:22,345 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2020-12-23 01:09:22,345 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:09:22,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:09:22,346 INFO L82 PathProgramCache]: Analyzing trace with hash 960432012, now seen corresponding path program 19 times [2020-12-23 01:09:22,346 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:09:22,346 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295973271] [2020-12-23 01:09:22,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:09:22,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:09:24,072 INFO L134 CoverageAnalysis]: Checked inductivity of 422 backedges. 144 proven. 278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:09:24,072 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295973271] [2020-12-23 01:09:24,072 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [739812711] [2020-12-23 01:09:24,072 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 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:09:24,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:09:24,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 71 conjunts are in the unsatisfiable core [2020-12-23 01:09:24,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:09:25,865 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 13 treesize of output 9 [2020-12-23 01:09:25,867 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:09:25,872 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:09:25,873 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 01:09:25,874 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:17, output treesize:9 [2020-12-23 01:09:27,371 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 01:09:27,378 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 01:09:27,489 INFO L134 CoverageAnalysis]: Checked inductivity of 422 backedges. 0 proven. 422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:09:27,490 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:09:27,490 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 38] total 74 [2020-12-23 01:09:27,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692305413] [2020-12-23 01:09:27,490 INFO L461 AbstractCegarLoop]: Interpolant automaton has 74 states [2020-12-23 01:09:27,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:09:27,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2020-12-23 01:09:27,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=286, Invalid=5116, Unknown=0, NotChecked=0, Total=5402 [2020-12-23 01:09:27,492 INFO L87 Difference]: Start difference. First operand 87 states and 89 transitions. Second operand 74 states. [2020-12-23 01:09:32,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:09:32,420 INFO L93 Difference]: Finished difference Result 140 states and 144 transitions. [2020-12-23 01:09:32,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-12-23 01:09:32,421 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 84 [2020-12-23 01:09:32,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:09:32,422 INFO L225 Difference]: With dead ends: 140 [2020-12-23 01:09:32,422 INFO L226 Difference]: Without dead ends: 89 [2020-12-23 01:09:32,424 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2076 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=607, Invalid=9493, Unknown=0, NotChecked=0, Total=10100 [2020-12-23 01:09:32,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-12-23 01:09:32,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 88. [2020-12-23 01:09:32,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-12-23 01:09:32,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 90 transitions. [2020-12-23 01:09:32,436 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 90 transitions. Word has length 84 [2020-12-23 01:09:32,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:09:32,436 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 90 transitions. [2020-12-23 01:09:32,436 INFO L482 AbstractCegarLoop]: Interpolant automaton has 74 states. [2020-12-23 01:09:32,436 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 90 transitions. [2020-12-23 01:09:32,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-12-23 01:09:32,437 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:09:32,437 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1] [2020-12-23 01:09:32,638 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2020-12-23 01:09:32,639 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:09:32,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:09:32,648 INFO L82 PathProgramCache]: Analyzing trace with hash 1155380773, now seen corresponding path program 10 times [2020-12-23 01:09:32,648 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:09:32,649 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068754613] [2020-12-23 01:09:32,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:09:32,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:09:32,895 INFO L134 CoverageAnalysis]: Checked inductivity of 447 backedges. 0 proven. 247 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2020-12-23 01:09:32,895 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068754613] [2020-12-23 01:09:32,896 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [432909181] [2020-12-23 01:09:32,896 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 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:09:32,980 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 01:09:32,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:09:32,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 73 conjunts are in the unsatisfiable core [2020-12-23 01:09:32,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:09:33,843 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 15 treesize of output 11 [2020-12-23 01:09:33,845 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:09:33,853 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:09:33,856 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 01:09:33,856 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:24, output treesize:17 [2020-12-23 01:09:34,006 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:09:34,006 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 54 [2020-12-23 01:09:34,008 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 01:09:34,009 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:09:34,035 INFO L625 ElimStorePlain]: treesize reduction 22, result has 52.2 percent of original size [2020-12-23 01:09:34,037 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 01:09:34,037 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:28, output treesize:9 [2020-12-23 01:09:35,105 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 01:09:35,107 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 01:09:35,206 INFO L134 CoverageAnalysis]: Checked inductivity of 447 backedges. 0 proven. 447 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:09:35,207 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:09:35,207 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 40] total 55 [2020-12-23 01:09:35,207 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244035813] [2020-12-23 01:09:35,207 INFO L461 AbstractCegarLoop]: Interpolant automaton has 55 states [2020-12-23 01:09:35,207 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:09:35,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2020-12-23 01:09:35,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=2746, Unknown=0, NotChecked=0, Total=2970 [2020-12-23 01:09:35,209 INFO L87 Difference]: Start difference. First operand 88 states and 90 transitions. Second operand 55 states. [2020-12-23 01:09:40,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:09:40,777 INFO L93 Difference]: Finished difference Result 196 states and 202 transitions. [2020-12-23 01:09:40,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2020-12-23 01:09:40,778 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 86 [2020-12-23 01:09:40,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:09:40,779 INFO L225 Difference]: With dead ends: 196 [2020-12-23 01:09:40,779 INFO L226 Difference]: Without dead ends: 151 [2020-12-23 01:09:40,782 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3315 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=856, Invalid=11800, Unknown=0, NotChecked=0, Total=12656 [2020-12-23 01:09:40,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2020-12-23 01:09:40,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 94. [2020-12-23 01:09:40,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-12-23 01:09:40,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 96 transitions. [2020-12-23 01:09:40,799 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 96 transitions. Word has length 86 [2020-12-23 01:09:40,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:09:40,799 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 96 transitions. [2020-12-23 01:09:40,800 INFO L482 AbstractCegarLoop]: Interpolant automaton has 55 states. [2020-12-23 01:09:40,800 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 96 transitions. [2020-12-23 01:09:40,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-12-23 01:09:40,800 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:09:40,800 INFO L422 BasicCegarLoop]: trace histogram [14, 13, 13, 12, 11, 11, 11, 1, 1, 1, 1, 1, 1] [2020-12-23 01:09:41,013 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-12-23 01:09:41,014 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:09:41,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:09:41,014 INFO L82 PathProgramCache]: Analyzing trace with hash -762793272, now seen corresponding path program 20 times [2020-12-23 01:09:41,015 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:09:41,015 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239713587] [2020-12-23 01:09:41,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:09:41,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:09:43,297 INFO L134 CoverageAnalysis]: Checked inductivity of 502 backedges. 180 proven. 322 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:09:43,297 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239713587] [2020-12-23 01:09:43,298 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1848645624] [2020-12-23 01:09:43,298 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 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:09:43,400 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 01:09:43,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:09:43,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 340 conjuncts, 65 conjunts are in the unsatisfiable core [2020-12-23 01:09:43,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:09:45,454 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 15 treesize of output 11 [2020-12-23 01:09:45,455 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:09:45,465 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:09:45,470 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 01:09:45,470 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:22, output treesize:15 [2020-12-23 01:09:47,493 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 01:09:47,495 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 01:09:47,497 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 01:09:47,497 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 01:09:47,498 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-23 01:09:47,627 INFO L134 CoverageAnalysis]: Checked inductivity of 502 backedges. 221 proven. 281 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:09:47,627 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:09:47,627 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 82 [2020-12-23 01:09:47,628 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772161118] [2020-12-23 01:09:47,628 INFO L461 AbstractCegarLoop]: Interpolant automaton has 82 states [2020-12-23 01:09:47,628 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:09:47,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2020-12-23 01:09:47,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=441, Invalid=6201, Unknown=0, NotChecked=0, Total=6642 [2020-12-23 01:09:47,629 INFO L87 Difference]: Start difference. First operand 94 states and 96 transitions. Second operand 82 states. [2020-12-23 01:09:53,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:09:53,075 INFO L93 Difference]: Finished difference Result 146 states and 149 transitions. [2020-12-23 01:09:53,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-12-23 01:09:53,076 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 91 [2020-12-23 01:09:53,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:09:53,077 INFO L225 Difference]: With dead ends: 146 [2020-12-23 01:09:53,077 INFO L226 Difference]: Without dead ends: 95 [2020-12-23 01:09:53,078 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3426 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=1021, Invalid=10109, Unknown=0, NotChecked=0, Total=11130 [2020-12-23 01:09:53,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-12-23 01:09:53,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2020-12-23 01:09:53,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-12-23 01:09:53,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 97 transitions. [2020-12-23 01:09:53,093 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 97 transitions. Word has length 91 [2020-12-23 01:09:53,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:09:53,093 INFO L481 AbstractCegarLoop]: Abstraction has 95 states and 97 transitions. [2020-12-23 01:09:53,093 INFO L482 AbstractCegarLoop]: Interpolant automaton has 82 states. [2020-12-23 01:09:53,094 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 97 transitions. [2020-12-23 01:09:53,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-12-23 01:09:53,094 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:09:53,094 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 12, 11, 11, 11, 1, 1, 1, 1, 1, 1] [2020-12-23 01:09:53,301 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-12-23 01:09:53,301 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:09:53,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:09:53,302 INFO L82 PathProgramCache]: Analyzing trace with hash 1377526625, now seen corresponding path program 11 times [2020-12-23 01:09:53,302 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:09:53,303 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045093482] [2020-12-23 01:09:53,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:09:53,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:09:53,838 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 242 trivial. 0 not checked. [2020-12-23 01:09:53,839 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045093482] [2020-12-23 01:09:53,839 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [258911142] [2020-12-23 01:09:53,839 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 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:09:54,314 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2020-12-23 01:09:54,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:09:54,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 347 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-23 01:09:54,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:09:54,809 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 242 trivial. 0 not checked. [2020-12-23 01:09:54,810 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:09:54,810 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2020-12-23 01:09:54,810 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126782208] [2020-12-23 01:09:54,810 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-12-23 01:09:54,810 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:09:54,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-12-23 01:09:54,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=423, Invalid=633, Unknown=0, NotChecked=0, Total=1056 [2020-12-23 01:09:54,811 INFO L87 Difference]: Start difference. First operand 95 states and 97 transitions. Second operand 33 states. [2020-12-23 01:09:55,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:09:55,029 INFO L93 Difference]: Finished difference Result 197 states and 201 transitions. [2020-12-23 01:09:55,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-23 01:09:55,030 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 93 [2020-12-23 01:09:55,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:09:55,031 INFO L225 Difference]: With dead ends: 197 [2020-12-23 01:09:55,031 INFO L226 Difference]: Without dead ends: 148 [2020-12-23 01:09:55,032 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 417 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=423, Invalid=633, Unknown=0, NotChecked=0, Total=1056 [2020-12-23 01:09:55,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-12-23 01:09:55,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 97. [2020-12-23 01:09:55,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-12-23 01:09:55,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 99 transitions. [2020-12-23 01:09:55,049 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 99 transitions. Word has length 93 [2020-12-23 01:09:55,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:09:55,049 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 99 transitions. [2020-12-23 01:09:55,049 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-12-23 01:09:55,049 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 99 transitions. [2020-12-23 01:09:55,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-12-23 01:09:55,050 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:09:55,050 INFO L422 BasicCegarLoop]: trace histogram [15, 14, 14, 12, 11, 11, 11, 1, 1, 1, 1, 1, 1] [2020-12-23 01:09:55,258 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-12-23 01:09:55,259 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:09:55,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:09:55,260 INFO L82 PathProgramCache]: Analyzing trace with hash -1575251838, now seen corresponding path program 21 times [2020-12-23 01:09:55,260 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:09:55,260 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621952972] [2020-12-23 01:09:55,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:09:55,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:09:57,443 INFO L134 CoverageAnalysis]: Checked inductivity of 543 backedges. 0 proven. 543 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:09:57,443 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621952972] [2020-12-23 01:09:57,444 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1310693095] [2020-12-23 01:09:57,444 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 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:09:57,890 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2020-12-23 01:09:57,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:09:57,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 72 conjunts are in the unsatisfiable core [2020-12-23 01:09:57,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:09:58,668 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 15 treesize of output 11 [2020-12-23 01:09:58,669 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:09:58,679 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:09:58,680 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 01:09:58,680 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:24, output treesize:17 [2020-12-23 01:09:58,890 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:09:58,890 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 56 [2020-12-23 01:09:58,892 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 01:09:58,897 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:09:58,923 INFO L625 ElimStorePlain]: treesize reduction 22, result has 54.2 percent of original size [2020-12-23 01:09:58,925 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 01:09:58,925 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:23 [2020-12-23 01:09:59,211 INFO L348 Elim1Store]: treesize reduction 12, result has 86.8 percent of original size [2020-12-23 01:09:59,212 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 95 [2020-12-23 01:09:59,214 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 01:09:59,216 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 01:09:59,217 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 01:09:59,220 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:09:59,250 INFO L625 ElimStorePlain]: treesize reduction 43, result has 42.7 percent of original size [2020-12-23 01:09:59,251 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 01:09:59,252 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:21 [2020-12-23 01:10:01,038 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 01:10:01,571 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 01:10:01,573 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 01:10:01,723 INFO L134 CoverageAnalysis]: Checked inductivity of 543 backedges. 0 proven. 543 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:10:01,723 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:10:01,723 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 35] total 76 [2020-12-23 01:10:01,723 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238966522] [2020-12-23 01:10:01,724 INFO L461 AbstractCegarLoop]: Interpolant automaton has 76 states [2020-12-23 01:10:01,724 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:10:01,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2020-12-23 01:10:01,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=220, Invalid=5480, Unknown=0, NotChecked=0, Total=5700 [2020-12-23 01:10:01,725 INFO L87 Difference]: Start difference. First operand 97 states and 99 transitions. Second operand 76 states. [2020-12-23 01:10:11,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:10:11,463 INFO L93 Difference]: Finished difference Result 215 states and 221 transitions. [2020-12-23 01:10:11,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2020-12-23 01:10:11,464 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 94 [2020-12-23 01:10:11,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:10:11,468 INFO L225 Difference]: With dead ends: 215 [2020-12-23 01:10:11,468 INFO L226 Difference]: Without dead ends: 213 [2020-12-23 01:10:11,468 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3667 ImplicationChecksByTransitivity, 11.3s TimeCoverageRelationStatistics Valid=679, Invalid=14573, Unknown=0, NotChecked=0, Total=15252 [2020-12-23 01:10:11,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2020-12-23 01:10:11,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 106. [2020-12-23 01:10:11,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-12-23 01:10:11,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 111 transitions. [2020-12-23 01:10:11,488 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 111 transitions. Word has length 94 [2020-12-23 01:10:11,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:10:11,489 INFO L481 AbstractCegarLoop]: Abstraction has 106 states and 111 transitions. [2020-12-23 01:10:11,489 INFO L482 AbstractCegarLoop]: Interpolant automaton has 76 states. [2020-12-23 01:10:11,489 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 111 transitions. [2020-12-23 01:10:11,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-12-23 01:10:11,489 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:10:11,489 INFO L422 BasicCegarLoop]: trace histogram [15, 14, 14, 13, 12, 12, 12, 1, 1, 1, 1, 1, 1] [2020-12-23 01:10:11,692 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-12-23 01:10:11,692 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:10:11,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:10:11,693 INFO L82 PathProgramCache]: Analyzing trace with hash 433931320, now seen corresponding path program 22 times [2020-12-23 01:10:11,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:10:11,694 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898090321] [2020-12-23 01:10:11,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:10:11,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:10:14,548 INFO L134 CoverageAnalysis]: Checked inductivity of 589 backedges. 220 proven. 369 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:10:14,548 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898090321] [2020-12-23 01:10:14,549 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1256357659] [2020-12-23 01:10:14,549 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 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:10:14,636 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 01:10:14,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:10:14,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 81 conjunts are in the unsatisfiable core [2020-12-23 01:10:14,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:10:17,344 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 13 treesize of output 9 [2020-12-23 01:10:17,345 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:10:17,353 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:10:17,355 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 01:10:17,355 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:17, output treesize:9 [2020-12-23 01:10:19,758 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 01:10:19,760 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 01:10:19,918 INFO L134 CoverageAnalysis]: Checked inductivity of 589 backedges. 0 proven. 589 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:10:19,919 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:10:19,919 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 44] total 86 [2020-12-23 01:10:19,919 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277074568] [2020-12-23 01:10:19,919 INFO L461 AbstractCegarLoop]: Interpolant automaton has 86 states [2020-12-23 01:10:19,920 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:10:19,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2020-12-23 01:10:19,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=347, Invalid=6963, Unknown=0, NotChecked=0, Total=7310 [2020-12-23 01:10:19,920 INFO L87 Difference]: Start difference. First operand 106 states and 111 transitions. Second operand 86 states. [2020-12-23 01:10:27,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:10:27,558 INFO L93 Difference]: Finished difference Result 166 states and 172 transitions. [2020-12-23 01:10:27,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2020-12-23 01:10:27,560 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 98 [2020-12-23 01:10:27,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:10:27,561 INFO L225 Difference]: With dead ends: 166 [2020-12-23 01:10:27,561 INFO L226 Difference]: Without dead ends: 107 [2020-12-23 01:10:27,562 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 56 SyntacticMatches, 2 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2818 ImplicationChecksByTransitivity, 10.9s TimeCoverageRelationStatistics Valid=744, Invalid=12828, Unknown=0, NotChecked=0, Total=13572 [2020-12-23 01:10:27,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-12-23 01:10:27,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 106. [2020-12-23 01:10:27,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-12-23 01:10:27,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 110 transitions. [2020-12-23 01:10:27,584 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 110 transitions. Word has length 98 [2020-12-23 01:10:27,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:10:27,584 INFO L481 AbstractCegarLoop]: Abstraction has 106 states and 110 transitions. [2020-12-23 01:10:27,584 INFO L482 AbstractCegarLoop]: Interpolant automaton has 86 states. [2020-12-23 01:10:27,584 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 110 transitions. [2020-12-23 01:10:27,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-12-23 01:10:27,585 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:10:27,585 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 12, 11, 11, 11, 1, 1, 1, 1, 1, 1] [2020-12-23 01:10:27,798 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:10:27,799 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:10:27,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:10:27,799 INFO L82 PathProgramCache]: Analyzing trace with hash 8544545, now seen corresponding path program 12 times [2020-12-23 01:10:27,800 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:10:27,800 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984448662] [2020-12-23 01:10:27,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:10:27,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:10:28,224 INFO L134 CoverageAnalysis]: Checked inductivity of 618 backedges. 0 proven. 376 refuted. 0 times theorem prover too weak. 242 trivial. 0 not checked. [2020-12-23 01:10:28,224 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984448662] [2020-12-23 01:10:28,224 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1514063841] [2020-12-23 01:10:28,224 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 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:10:29,077 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2020-12-23 01:10:29,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:10:29,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-23 01:10:29,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:10:29,726 INFO L134 CoverageAnalysis]: Checked inductivity of 618 backedges. 0 proven. 376 refuted. 0 times theorem prover too weak. 242 trivial. 0 not checked. [2020-12-23 01:10:29,726 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:10:29,726 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2020-12-23 01:10:29,727 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078785998] [2020-12-23 01:10:29,727 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-12-23 01:10:29,727 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:10:29,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-12-23 01:10:29,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=802, Unknown=0, NotChecked=0, Total=1332 [2020-12-23 01:10:29,728 INFO L87 Difference]: Start difference. First operand 106 states and 110 transitions. Second operand 37 states. [2020-12-23 01:10:29,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:10:29,982 INFO L93 Difference]: Finished difference Result 261 states and 267 transitions. [2020-12-23 01:10:29,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-23 01:10:29,983 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 99 [2020-12-23 01:10:29,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:10:29,984 INFO L225 Difference]: With dead ends: 261 [2020-12-23 01:10:29,984 INFO L226 Difference]: Without dead ends: 207 [2020-12-23 01:10:29,985 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 541 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=530, Invalid=802, Unknown=0, NotChecked=0, Total=1332 [2020-12-23 01:10:29,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2020-12-23 01:10:30,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 108. [2020-12-23 01:10:30,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-12-23 01:10:30,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 111 transitions. [2020-12-23 01:10:30,007 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 111 transitions. Word has length 99 [2020-12-23 01:10:30,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:10:30,008 INFO L481 AbstractCegarLoop]: Abstraction has 108 states and 111 transitions. [2020-12-23 01:10:30,008 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-12-23 01:10:30,008 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 111 transitions. [2020-12-23 01:10:30,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-12-23 01:10:30,008 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:10:30,008 INFO L422 BasicCegarLoop]: trace histogram [17, 16, 16, 12, 11, 11, 11, 1, 1, 1, 1, 1, 1] [2020-12-23 01:10:30,209 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:10:30,209 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:10:30,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:10:30,210 INFO L82 PathProgramCache]: Analyzing trace with hash -1064023358, now seen corresponding path program 23 times [2020-12-23 01:10:30,210 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:10:30,211 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835631158] [2020-12-23 01:10:30,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:10:30,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:10:33,138 INFO L134 CoverageAnalysis]: Checked inductivity of 634 backedges. 3 proven. 631 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:10:33,138 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835631158] [2020-12-23 01:10:33,139 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1875245253] [2020-12-23 01:10:33,139 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 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:10:33,425 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2020-12-23 01:10:33,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:10:33,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 376 conjuncts, 82 conjunts are in the unsatisfiable core [2020-12-23 01:10:33,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:10:35,859 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 15 treesize of output 11 [2020-12-23 01:10:35,860 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:10:35,872 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:10:35,873 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 01:10:35,874 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:22, output treesize:15 [2020-12-23 01:10:36,144 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:10:36,145 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 54 [2020-12-23 01:10:36,148 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 01:10:36,150 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:10:36,183 INFO L625 ElimStorePlain]: treesize reduction 22, result has 52.2 percent of original size [2020-12-23 01:10:36,185 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 01:10:36,186 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:13 [2020-12-23 01:10:36,346 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:10:36,347 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 54 [2020-12-23 01:10:36,348 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 01:10:36,351 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:10:36,382 INFO L625 ElimStorePlain]: treesize reduction 22, result has 52.2 percent of original size [2020-12-23 01:10:36,384 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 01:10:36,385 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:13 [2020-12-23 01:10:36,534 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:10:36,535 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 54 [2020-12-23 01:10:36,536 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 01:10:36,538 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:10:36,569 INFO L625 ElimStorePlain]: treesize reduction 22, result has 52.2 percent of original size [2020-12-23 01:10:36,571 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 01:10:36,572 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:28, output treesize:9 [2020-12-23 01:10:38,367 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 01:10:38,369 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 01:10:38,494 INFO L134 CoverageAnalysis]: Checked inductivity of 634 backedges. 7 proven. 627 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:10:38,495 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:10:38,495 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 88 [2020-12-23 01:10:38,495 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988434436] [2020-12-23 01:10:38,495 INFO L461 AbstractCegarLoop]: Interpolant automaton has 88 states [2020-12-23 01:10:38,495 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:10:38,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2020-12-23 01:10:38,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=7354, Unknown=0, NotChecked=0, Total=7656 [2020-12-23 01:10:38,496 INFO L87 Difference]: Start difference. First operand 108 states and 111 transitions. Second operand 88 states. [2020-12-23 01:10:48,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:10:48,296 INFO L93 Difference]: Finished difference Result 159 states and 162 transitions. [2020-12-23 01:10:48,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2020-12-23 01:10:48,298 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 100 [2020-12-23 01:10:48,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:10:48,299 INFO L225 Difference]: With dead ends: 159 [2020-12-23 01:10:48,299 INFO L226 Difference]: Without dead ends: 157 [2020-12-23 01:10:48,300 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 57 SyntacticMatches, 3 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3980 ImplicationChecksByTransitivity, 12.0s TimeCoverageRelationStatistics Valid=738, Invalid=13068, Unknown=0, NotChecked=0, Total=13806 [2020-12-23 01:10:48,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2020-12-23 01:10:48,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 107. [2020-12-23 01:10:48,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-12-23 01:10:48,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 110 transitions. [2020-12-23 01:10:48,324 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 110 transitions. Word has length 100 [2020-12-23 01:10:48,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:10:48,327 INFO L481 AbstractCegarLoop]: Abstraction has 107 states and 110 transitions. [2020-12-23 01:10:48,327 INFO L482 AbstractCegarLoop]: Interpolant automaton has 88 states. [2020-12-23 01:10:48,327 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 110 transitions. [2020-12-23 01:10:48,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-12-23 01:10:48,328 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:10:48,328 INFO L422 BasicCegarLoop]: trace histogram [16, 15, 15, 13, 12, 12, 12, 1, 1, 1, 1, 1, 1] [2020-12-23 01:10:48,541 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:10:48,542 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:10:48,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:10:48,543 INFO L82 PathProgramCache]: Analyzing trace with hash -547200706, now seen corresponding path program 24 times [2020-12-23 01:10:48,543 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:10:48,543 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303359182] [2020-12-23 01:10:48,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:10:48,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:10:51,205 INFO L134 CoverageAnalysis]: Checked inductivity of 633 backedges. 0 proven. 633 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:10:51,205 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303359182] [2020-12-23 01:10:51,205 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1135363040] [2020-12-23 01:10:51,205 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 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:10:51,823 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2020-12-23 01:10:51,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:10:51,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 83 conjunts are in the unsatisfiable core [2020-12-23 01:10:51,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:10:51,972 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 15 treesize of output 11 [2020-12-23 01:10:51,973 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:10:51,988 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:10:51,990 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 01:10:51,990 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2020-12-23 01:10:52,172 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:10:52,173 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 62 [2020-12-23 01:10:52,175 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 01:10:52,177 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:10:52,222 INFO L625 ElimStorePlain]: treesize reduction 28, result has 54.8 percent of original size [2020-12-23 01:10:52,224 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-23 01:10:52,224 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:38, output treesize:18 [2020-12-23 01:10:54,027 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 01:10:54,030 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 01:10:54,177 INFO L134 CoverageAnalysis]: Checked inductivity of 633 backedges. 0 proven. 633 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:10:54,177 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:10:54,177 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 61 [2020-12-23 01:10:54,177 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829160879] [2020-12-23 01:10:54,178 INFO L461 AbstractCegarLoop]: Interpolant automaton has 61 states [2020-12-23 01:10:54,178 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:10:54,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2020-12-23 01:10:54,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=3495, Unknown=0, NotChecked=0, Total=3660 [2020-12-23 01:10:54,178 INFO L87 Difference]: Start difference. First operand 107 states and 110 transitions. Second operand 61 states. [2020-12-23 01:11:01,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:11:01,311 INFO L93 Difference]: Finished difference Result 116 states and 119 transitions. [2020-12-23 01:11:01,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2020-12-23 01:11:01,312 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 101 [2020-12-23 01:11:01,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:11:01,314 INFO L225 Difference]: With dead ends: 116 [2020-12-23 01:11:01,314 INFO L226 Difference]: Without dead ends: 114 [2020-12-23 01:11:01,315 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 83 SyntacticMatches, 4 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2002 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=435, Invalid=7937, Unknown=0, NotChecked=0, Total=8372 [2020-12-23 01:11:01,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-12-23 01:11:01,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 111. [2020-12-23 01:11:01,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-12-23 01:11:01,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 114 transitions. [2020-12-23 01:11:01,336 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 114 transitions. Word has length 101 [2020-12-23 01:11:01,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:11:01,337 INFO L481 AbstractCegarLoop]: Abstraction has 111 states and 114 transitions. [2020-12-23 01:11:01,337 INFO L482 AbstractCegarLoop]: Interpolant automaton has 61 states. [2020-12-23 01:11:01,337 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 114 transitions. [2020-12-23 01:11:01,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-12-23 01:11:01,338 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:11:01,338 INFO L422 BasicCegarLoop]: trace histogram [16, 15, 15, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1] [2020-12-23 01:11:01,552 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2020-12-23 01:11:01,552 INFO L429 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:11:01,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:11:01,553 INFO L82 PathProgramCache]: Analyzing trace with hash -1047177484, now seen corresponding path program 25 times [2020-12-23 01:11:01,554 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:11:01,554 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578319436] [2020-12-23 01:11:01,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:11:01,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:11:05,679 INFO L134 CoverageAnalysis]: Checked inductivity of 683 backedges. 264 proven. 419 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:11:05,680 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578319436] [2020-12-23 01:11:05,680 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [224286592] [2020-12-23 01:11:05,680 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 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:11:05,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:11:05,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 386 conjuncts, 86 conjunts are in the unsatisfiable core [2020-12-23 01:11:05,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:11:09,820 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 13 treesize of output 9 [2020-12-23 01:11:09,822 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:11:09,832 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:11:09,833 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 01:11:09,834 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:17, output treesize:9 [2020-12-23 01:11:13,294 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 01:11:13,297 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 01:11:13,498 INFO L134 CoverageAnalysis]: Checked inductivity of 683 backedges. 0 proven. 683 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:11:13,498 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:11:13,498 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 47] total 92 [2020-12-23 01:11:13,498 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681448662] [2020-12-23 01:11:13,499 INFO L461 AbstractCegarLoop]: Interpolant automaton has 92 states [2020-12-23 01:11:13,499 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:11:13,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2020-12-23 01:11:13,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=379, Invalid=7993, Unknown=0, NotChecked=0, Total=8372 [2020-12-23 01:11:13,501 INFO L87 Difference]: Start difference. First operand 111 states and 114 transitions. Second operand 92 states. [2020-12-23 01:11:23,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:11:23,826 INFO L93 Difference]: Finished difference Result 174 states and 178 transitions. [2020-12-23 01:11:23,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2020-12-23 01:11:23,827 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 105 [2020-12-23 01:11:23,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:11:23,829 INFO L225 Difference]: With dead ends: 174 [2020-12-23 01:11:23,829 INFO L226 Difference]: Without dead ends: 111 [2020-12-23 01:11:23,830 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 60 SyntacticMatches, 2 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3231 ImplicationChecksByTransitivity, 15.7s TimeCoverageRelationStatistics Valid=817, Invalid=14683, Unknown=0, NotChecked=0, Total=15500 [2020-12-23 01:11:23,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-12-23 01:11:23,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2020-12-23 01:11:23,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-12-23 01:11:23,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 113 transitions. [2020-12-23 01:11:23,868 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 113 transitions. Word has length 105 [2020-12-23 01:11:23,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:11:23,868 INFO L481 AbstractCegarLoop]: Abstraction has 111 states and 113 transitions. [2020-12-23 01:11:23,868 INFO L482 AbstractCegarLoop]: Interpolant automaton has 92 states. [2020-12-23 01:11:23,868 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 113 transitions. [2020-12-23 01:11:23,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-12-23 01:11:23,869 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:11:23,869 INFO L422 BasicCegarLoop]: trace histogram [17, 16, 16, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1] [2020-12-23 01:11:24,083 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:11:24,084 INFO L429 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:11:24,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:11:24,085 INFO L82 PathProgramCache]: Analyzing trace with hash -1647532242, now seen corresponding path program 26 times [2020-12-23 01:11:24,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:11:24,085 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128372882] [2020-12-23 01:11:24,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:11:24,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:11:27,378 INFO L134 CoverageAnalysis]: Checked inductivity of 730 backedges. 0 proven. 730 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:11:27,379 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128372882] [2020-12-23 01:11:27,379 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1129556896] [2020-12-23 01:11:27,379 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 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:11:27,489 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 01:11:27,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:11:27,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 398 conjuncts, 88 conjunts are in the unsatisfiable core [2020-12-23 01:11:27,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:11:27,682 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 15 treesize of output 11 [2020-12-23 01:11:27,685 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:11:27,698 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:11:27,700 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 01:11:27,700 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2020-12-23 01:11:27,920 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:11:27,921 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 62 [2020-12-23 01:11:27,923 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 01:11:27,925 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:11:27,987 INFO L625 ElimStorePlain]: treesize reduction 28, result has 54.8 percent of original size [2020-12-23 01:11:27,990 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-23 01:11:27,990 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:38, output treesize:18 [2020-12-23 01:11:30,695 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 01:11:30,696 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 01:11:30,891 INFO L134 CoverageAnalysis]: Checked inductivity of 730 backedges. 0 proven. 730 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:11:30,891 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:11:30,891 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 65 [2020-12-23 01:11:30,891 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807981626] [2020-12-23 01:11:30,892 INFO L461 AbstractCegarLoop]: Interpolant automaton has 65 states [2020-12-23 01:11:30,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:11:30,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2020-12-23 01:11:30,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=3985, Unknown=0, NotChecked=0, Total=4160 [2020-12-23 01:11:30,892 INFO L87 Difference]: Start difference. First operand 111 states and 113 transitions. Second operand 65 states. [2020-12-23 01:11:40,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:11:40,668 INFO L93 Difference]: Finished difference Result 120 states and 122 transitions. [2020-12-23 01:11:40,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2020-12-23 01:11:40,670 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 108 [2020-12-23 01:11:40,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:11:40,671 INFO L225 Difference]: With dead ends: 120 [2020-12-23 01:11:40,671 INFO L226 Difference]: Without dead ends: 118 [2020-12-23 01:11:40,672 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 89 SyntacticMatches, 4 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2290 ImplicationChecksByTransitivity, 9.2s TimeCoverageRelationStatistics Valid=460, Invalid=9046, Unknown=0, NotChecked=0, Total=9506 [2020-12-23 01:11:40,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-12-23 01:11:40,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 115. [2020-12-23 01:11:40,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-12-23 01:11:40,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 117 transitions. [2020-12-23 01:11:40,705 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 117 transitions. Word has length 108 [2020-12-23 01:11:40,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:11:40,705 INFO L481 AbstractCegarLoop]: Abstraction has 115 states and 117 transitions. [2020-12-23 01:11:40,705 INFO L482 AbstractCegarLoop]: Interpolant automaton has 65 states. [2020-12-23 01:11:40,705 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 117 transitions. [2020-12-23 01:11:40,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-12-23 01:11:40,706 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:11:40,706 INFO L422 BasicCegarLoop]: trace histogram [17, 16, 16, 15, 14, 14, 14, 1, 1, 1, 1, 1, 1] [2020-12-23 01:11:40,919 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:11:40,919 INFO L429 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:11:40,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:11:40,920 INFO L82 PathProgramCache]: Analyzing trace with hash 344663268, now seen corresponding path program 27 times [2020-12-23 01:11:40,920 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:11:40,920 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882407217] [2020-12-23 01:11:40,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:11:40,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:11:46,112 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 312 proven. 472 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:11:46,112 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882407217] [2020-12-23 01:11:46,112 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [804088748] [2020-12-23 01:11:46,112 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 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:11:46,964 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2020-12-23 01:11:46,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:11:46,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 409 conjuncts, 53 conjunts are in the unsatisfiable core [2020-12-23 01:11:46,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:11:46,995 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2020-12-23 01:11:46,997 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:11:47,001 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:11:47,002 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-23 01:11:47,002 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:9, output treesize:3 [2020-12-23 01:11:49,371 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 15 treesize of output 11 [2020-12-23 01:11:49,374 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:11:49,387 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:11:49,389 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 01:11:49,389 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:24, output treesize:17 [2020-12-23 01:11:49,776 INFO L348 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2020-12-23 01:11:49,776 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 31 [2020-12-23 01:11:49,778 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:11:49,789 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:11:49,790 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 01:11:49,790 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:28