/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-examples/standard_running-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-dcfa08f [2020-12-23 00:07:41,548 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-23 00:07:41,552 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-23 00:07:41,607 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-23 00:07:41,607 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-23 00:07:41,612 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-23 00:07:41,615 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-23 00:07:41,620 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-23 00:07:41,624 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-23 00:07:41,629 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-23 00:07:41,634 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-23 00:07:41,635 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-23 00:07:41,636 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-23 00:07:41,639 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-23 00:07:41,641 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-23 00:07:41,643 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-23 00:07:41,645 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-23 00:07:41,648 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-23 00:07:41,655 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-23 00:07:41,663 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-23 00:07:41,665 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-23 00:07:41,667 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-23 00:07:41,682 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-23 00:07:41,685 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-23 00:07:41,694 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-23 00:07:41,714 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-23 00:07:41,715 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-23 00:07:41,716 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-23 00:07:41,721 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-23 00:07:41,771 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-23 00:07:41,771 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-23 00:07:41,776 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-23 00:07:41,776 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-23 00:07:41,777 INFO L138 SettingsManager]: * Use SBE=true [2020-12-23 00:07:41,777 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-23 00:07:41,777 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-23 00:07:41,777 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-23 00:07:41,777 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-23 00:07:41,778 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-23 00:07:41,778 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-23 00:07:41,778 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-23 00:07:41,778 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-23 00:07:41,778 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-23 00:07:41,779 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-23 00:07:41,779 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-23 00:07:41,779 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-23 00:07:41,779 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 00:07:41,780 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-23 00:07:41,780 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-23 00:07:41,780 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-23 00:07:41,780 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-23 00:07:41,781 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-23 00:07:41,781 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-23 00:07:41,781 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-23 00:07:41,781 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-23 00:07:42,168 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-23 00:07:42,197 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-23 00:07:42,200 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-23 00:07:42,201 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-23 00:07:42,202 INFO L275 PluginConnector]: CDTParser initialized [2020-12-23 00:07:42,203 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/standard_running-2.i [2020-12-23 00:07:42,281 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/d5f7c0f8c/b55ac5e005b241d5918177fa613142d5/FLAG3ca01d57e [2020-12-23 00:07:42,994 INFO L306 CDTParser]: Found 1 translation units. [2020-12-23 00:07:42,995 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-examples/standard_running-2.i [2020-12-23 00:07:43,005 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/d5f7c0f8c/b55ac5e005b241d5918177fa613142d5/FLAG3ca01d57e [2020-12-23 00:07:43,316 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/d5f7c0f8c/b55ac5e005b241d5918177fa613142d5 [2020-12-23 00:07:43,322 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-23 00:07:43,325 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-23 00:07:43,327 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-23 00:07:43,327 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-23 00:07:43,333 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-23 00:07:43,334 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 12:07:43" (1/1) ... [2020-12-23 00:07:43,335 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@14cfe089 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:07:43, skipping insertion in model container [2020-12-23 00:07:43,335 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 12:07:43" (1/1) ... [2020-12-23 00:07:43,344 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-23 00:07:43,360 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-23 00:07:43,506 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-examples/standard_running-2.i[811,824] 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[~i~0,] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~b~0,],[IdentifierExpression[~i~0,]]] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~b~0,],[IdentifierExpression[~i~0,]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~f~0,] left hand side expression in assignment: lhs: VariableLHS[~f~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] [2020-12-23 00:07:43,526 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 00:07:43,534 INFO L203 MainTranslator]: Completed pre-run [2020-12-23 00:07:43,548 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-examples/standard_running-2.i[811,824] 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[~i~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#b~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#b~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~0,]]]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#b~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#b~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~f~0,] left hand side expression in assignment: lhs: VariableLHS[~f~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] [2020-12-23 00:07:43,558 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 00:07:43,573 INFO L208 MainTranslator]: Completed translation [2020-12-23 00:07:43,574 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:07:43 WrapperNode [2020-12-23 00:07:43,574 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-23 00:07:43,575 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-23 00:07:43,575 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-23 00:07:43,575 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-23 00:07:43,584 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:07:43" (1/1) ... [2020-12-23 00:07:43,591 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:07:43" (1/1) ... [2020-12-23 00:07:43,613 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-23 00:07:43,614 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-23 00:07:43,614 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-23 00:07:43,614 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-23 00:07:43,624 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:07:43" (1/1) ... [2020-12-23 00:07:43,625 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:07:43" (1/1) ... [2020-12-23 00:07:43,627 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:07:43" (1/1) ... [2020-12-23 00:07:43,628 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:07:43" (1/1) ... [2020-12-23 00:07:43,634 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:07:43" (1/1) ... [2020-12-23 00:07:43,640 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:07:43" (1/1) ... [2020-12-23 00:07:43,642 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:07:43" (1/1) ... [2020-12-23 00:07:43,645 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-23 00:07:43,646 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-23 00:07:43,646 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-23 00:07:43,646 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-23 00:07:43,648 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:07:43" (1/1) ... No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 00:07:43,765 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-23 00:07:43,765 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-23 00:07:43,766 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-23 00:07:43,766 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-23 00:07:43,766 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-23 00:07:43,766 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-23 00:07:43,766 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-23 00:07:44,184 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-23 00:07:44,184 INFO L299 CfgBuilder]: Removed 9 assume(true) statements. [2020-12-23 00:07:44,186 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 12:07:44 BoogieIcfgContainer [2020-12-23 00:07:44,187 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-23 00:07:44,189 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-23 00:07:44,189 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-23 00:07:44,194 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-23 00:07:44,194 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.12 12:07:43" (1/3) ... [2020-12-23 00:07:44,196 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a7d5568 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 12:07:44, skipping insertion in model container [2020-12-23 00:07:44,196 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:07:43" (2/3) ... [2020-12-23 00:07:44,196 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a7d5568 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 12:07:44, skipping insertion in model container [2020-12-23 00:07:44,197 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 12:07:44" (3/3) ... [2020-12-23 00:07:44,199 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_running-2.i [2020-12-23 00:07:44,209 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-23 00:07:44,215 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-23 00:07:44,248 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-23 00:07:44,316 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-23 00:07:44,317 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-23 00:07:44,317 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-23 00:07:44,317 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-23 00:07:44,317 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-23 00:07:44,317 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-23 00:07:44,318 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-23 00:07:44,318 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-23 00:07:44,338 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2020-12-23 00:07:44,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-23 00:07:44,345 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:07:44,346 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:07:44,346 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:07:44,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:07:44,355 INFO L82 PathProgramCache]: Analyzing trace with hash -2030235279, now seen corresponding path program 1 times [2020-12-23 00:07:44,367 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:07:44,367 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786876494] [2020-12-23 00:07:44,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:07:44,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:07:44,545 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:07:44,546 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786876494] [2020-12-23 00:07:44,547 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 00:07:44,547 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-23 00:07:44,548 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452237798] [2020-12-23 00:07:44,553 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-23 00:07:44,554 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:07:44,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-23 00:07:44,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-23 00:07:44,573 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 2 states. [2020-12-23 00:07:44,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:07:44,594 INFO L93 Difference]: Finished difference Result 44 states and 64 transitions. [2020-12-23 00:07:44,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-23 00:07:44,596 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2020-12-23 00:07:44,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:07:44,608 INFO L225 Difference]: With dead ends: 44 [2020-12-23 00:07:44,608 INFO L226 Difference]: Without dead ends: 20 [2020-12-23 00:07:44,612 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 00:07:44,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-12-23 00:07:44,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-12-23 00:07:44,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-12-23 00:07:44,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 27 transitions. [2020-12-23 00:07:44,659 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 27 transitions. Word has length 10 [2020-12-23 00:07:44,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:07:44,659 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 27 transitions. [2020-12-23 00:07:44,660 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-23 00:07:44,660 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 27 transitions. [2020-12-23 00:07:44,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-23 00:07:44,661 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:07:44,661 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:07:44,661 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-23 00:07:44,661 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:07:44,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:07:44,663 INFO L82 PathProgramCache]: Analyzing trace with hash 1948917626, now seen corresponding path program 1 times [2020-12-23 00:07:44,663 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:07:44,663 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699040732] [2020-12-23 00:07:44,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:07:44,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:07:44,726 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:07:44,726 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699040732] [2020-12-23 00:07:44,726 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 00:07:44,727 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 00:07:44,727 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090145449] [2020-12-23 00:07:44,729 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 00:07:44,729 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:07:44,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 00:07:44,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 00:07:44,731 INFO L87 Difference]: Start difference. First operand 20 states and 27 transitions. Second operand 3 states. [2020-12-23 00:07:44,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:07:44,907 INFO L93 Difference]: Finished difference Result 48 states and 69 transitions. [2020-12-23 00:07:44,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 00:07:44,909 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2020-12-23 00:07:44,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:07:44,911 INFO L225 Difference]: With dead ends: 48 [2020-12-23 00:07:44,912 INFO L226 Difference]: Without dead ends: 32 [2020-12-23 00:07:44,913 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 00:07:44,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-12-23 00:07:44,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 23. [2020-12-23 00:07:44,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-12-23 00:07:44,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 30 transitions. [2020-12-23 00:07:44,929 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 30 transitions. Word has length 10 [2020-12-23 00:07:44,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:07:44,930 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 30 transitions. [2020-12-23 00:07:44,930 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 00:07:44,931 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 30 transitions. [2020-12-23 00:07:44,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-12-23 00:07:44,933 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:07:44,933 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:07:44,934 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-23 00:07:44,934 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:07:44,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:07:44,936 INFO L82 PathProgramCache]: Analyzing trace with hash -1221461665, now seen corresponding path program 1 times [2020-12-23 00:07:44,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:07:44,937 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749901148] [2020-12-23 00:07:44,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:07:44,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:07:45,063 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-23 00:07:45,064 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749901148] [2020-12-23 00:07:45,064 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1331524080] [2020-12-23 00:07:45,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:07:45,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:07:45,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-23 00:07:45,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:07:45,287 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-23 00:07:45,288 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:07:45,288 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-12-23 00:07:45,288 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807403266] [2020-12-23 00:07:45,289 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 00:07:45,289 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:07:45,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 00:07:45,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-23 00:07:45,291 INFO L87 Difference]: Start difference. First operand 23 states and 30 transitions. Second operand 5 states. [2020-12-23 00:07:45,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:07:45,423 INFO L93 Difference]: Finished difference Result 62 states and 88 transitions. [2020-12-23 00:07:45,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 00:07:45,424 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 22 [2020-12-23 00:07:45,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:07:45,425 INFO L225 Difference]: With dead ends: 62 [2020-12-23 00:07:45,425 INFO L226 Difference]: Without dead ends: 44 [2020-12-23 00:07:45,426 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-23 00:07:45,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-12-23 00:07:45,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 35. [2020-12-23 00:07:45,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-12-23 00:07:45,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 47 transitions. [2020-12-23 00:07:45,433 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 47 transitions. Word has length 22 [2020-12-23 00:07:45,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:07:45,434 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 47 transitions. [2020-12-23 00:07:45,434 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 00:07:45,434 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 47 transitions. [2020-12-23 00:07:45,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-12-23 00:07:45,436 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:07:45,436 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:07:45,650 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-12-23 00:07:45,651 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:07:45,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:07:45,653 INFO L82 PathProgramCache]: Analyzing trace with hash 36788574, now seen corresponding path program 2 times [2020-12-23 00:07:45,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:07:45,654 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322362147] [2020-12-23 00:07:45,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:07:45,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:07:45,750 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-12-23 00:07:45,750 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322362147] [2020-12-23 00:07:45,751 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 00:07:45,751 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-23 00:07:45,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678695370] [2020-12-23 00:07:45,752 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 00:07:45,752 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:07:45,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 00:07:45,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-23 00:07:45,753 INFO L87 Difference]: Start difference. First operand 35 states and 47 transitions. Second operand 5 states. [2020-12-23 00:07:45,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:07:45,823 INFO L93 Difference]: Finished difference Result 60 states and 82 transitions. [2020-12-23 00:07:45,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 00:07:45,824 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 34 [2020-12-23 00:07:45,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:07:45,825 INFO L225 Difference]: With dead ends: 60 [2020-12-23 00:07:45,825 INFO L226 Difference]: Without dead ends: 47 [2020-12-23 00:07:45,826 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-12-23 00:07:45,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-12-23 00:07:45,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 41. [2020-12-23 00:07:45,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-12-23 00:07:45,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 55 transitions. [2020-12-23 00:07:45,834 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 55 transitions. Word has length 34 [2020-12-23 00:07:45,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:07:45,834 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 55 transitions. [2020-12-23 00:07:45,834 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 00:07:45,835 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 55 transitions. [2020-12-23 00:07:45,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-12-23 00:07:45,836 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:07:45,836 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:07:45,836 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-23 00:07:45,837 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:07:45,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:07:45,837 INFO L82 PathProgramCache]: Analyzing trace with hash -492759138, now seen corresponding path program 1 times [2020-12-23 00:07:45,838 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:07:45,838 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147224263] [2020-12-23 00:07:45,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:07:45,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:07:45,916 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-12-23 00:07:45,917 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147224263] [2020-12-23 00:07:45,917 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 00:07:45,917 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-23 00:07:45,917 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840428552] [2020-12-23 00:07:45,918 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 00:07:45,918 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:07:45,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 00:07:45,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-23 00:07:45,919 INFO L87 Difference]: Start difference. First operand 41 states and 55 transitions. Second operand 5 states. [2020-12-23 00:07:46,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:07:46,011 INFO L93 Difference]: Finished difference Result 69 states and 93 transitions. [2020-12-23 00:07:46,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 00:07:46,011 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 34 [2020-12-23 00:07:46,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:07:46,014 INFO L225 Difference]: With dead ends: 69 [2020-12-23 00:07:46,014 INFO L226 Difference]: Without dead ends: 51 [2020-12-23 00:07:46,019 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-12-23 00:07:46,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-12-23 00:07:46,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 43. [2020-12-23 00:07:46,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-12-23 00:07:46,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 57 transitions. [2020-12-23 00:07:46,026 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 57 transitions. Word has length 34 [2020-12-23 00:07:46,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:07:46,027 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 57 transitions. [2020-12-23 00:07:46,027 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 00:07:46,027 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 57 transitions. [2020-12-23 00:07:46,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-12-23 00:07:46,028 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:07:46,028 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:07:46,028 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-23 00:07:46,029 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:07:46,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:07:46,029 INFO L82 PathProgramCache]: Analyzing trace with hash 271130974, now seen corresponding path program 1 times [2020-12-23 00:07:46,030 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:07:46,030 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160147723] [2020-12-23 00:07:46,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:07:46,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:07:46,087 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-12-23 00:07:46,088 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160147723] [2020-12-23 00:07:46,088 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [787801479] [2020-12-23 00:07:46,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:07:46,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:07:46,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-23 00:07:46,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:07:46,195 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-12-23 00:07:46,196 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:07:46,196 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-12-23 00:07:46,196 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309893447] [2020-12-23 00:07:46,197 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 00:07:46,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:07:46,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 00:07:46,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-23 00:07:46,198 INFO L87 Difference]: Start difference. First operand 43 states and 57 transitions. Second operand 6 states. [2020-12-23 00:07:46,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:07:46,289 INFO L93 Difference]: Finished difference Result 108 states and 150 transitions. [2020-12-23 00:07:46,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 00:07:46,289 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 34 [2020-12-23 00:07:46,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:07:46,290 INFO L225 Difference]: With dead ends: 108 [2020-12-23 00:07:46,291 INFO L226 Difference]: Without dead ends: 72 [2020-12-23 00:07:46,291 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-23 00:07:46,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-12-23 00:07:46,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 59. [2020-12-23 00:07:46,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-12-23 00:07:46,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 79 transitions. [2020-12-23 00:07:46,299 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 79 transitions. Word has length 34 [2020-12-23 00:07:46,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:07:46,300 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 79 transitions. [2020-12-23 00:07:46,300 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 00:07:46,300 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 79 transitions. [2020-12-23 00:07:46,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-12-23 00:07:46,301 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:07:46,302 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:07:46,517 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:07:46,518 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:07:46,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:07:46,519 INFO L82 PathProgramCache]: Analyzing trace with hash 984188611, now seen corresponding path program 2 times [2020-12-23 00:07:46,520 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:07:46,520 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341304786] [2020-12-23 00:07:46,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:07:46,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:07:46,586 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-12-23 00:07:46,587 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341304786] [2020-12-23 00:07:46,587 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1183321355] [2020-12-23 00:07:46,587 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:07:46,654 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 00:07:46,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:07:46,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-23 00:07:46,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:07:46,749 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-12-23 00:07:46,749 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:07:46,749 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-12-23 00:07:46,750 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630677420] [2020-12-23 00:07:46,752 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-23 00:07:46,752 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:07:46,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-23 00:07:46,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-23 00:07:46,755 INFO L87 Difference]: Start difference. First operand 59 states and 79 transitions. Second operand 7 states. [2020-12-23 00:07:46,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:07:46,900 INFO L93 Difference]: Finished difference Result 138 states and 192 transitions. [2020-12-23 00:07:46,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 00:07:46,901 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 46 [2020-12-23 00:07:46,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:07:46,902 INFO L225 Difference]: With dead ends: 138 [2020-12-23 00:07:46,902 INFO L226 Difference]: Without dead ends: 88 [2020-12-23 00:07:46,905 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-23 00:07:46,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-12-23 00:07:46,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 75. [2020-12-23 00:07:46,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-12-23 00:07:46,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 101 transitions. [2020-12-23 00:07:46,921 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 101 transitions. Word has length 46 [2020-12-23 00:07:46,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:07:46,924 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 101 transitions. [2020-12-23 00:07:46,924 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-23 00:07:46,925 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 101 transitions. [2020-12-23 00:07:46,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-12-23 00:07:46,931 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:07:46,931 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:07:47,144 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:07:47,145 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:07:47,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:07:47,146 INFO L82 PathProgramCache]: Analyzing trace with hash -1354664638, now seen corresponding path program 3 times [2020-12-23 00:07:47,146 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:07:47,147 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147300127] [2020-12-23 00:07:47,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:07:47,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:07:47,287 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2020-12-23 00:07:47,293 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147300127] [2020-12-23 00:07:47,293 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [101881709] [2020-12-23 00:07:47,294 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 00:07:47,374 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-23 00:07:47,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:07:47,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-23 00:07:47,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:07:47,462 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 00:07:47,463 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:07:47,469 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:07:47,472 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:07:47,473 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:15 [2020-12-23 00:07:47,782 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 00:07:47,790 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-23 00:07:47,834 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:07:47,834 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 24 [2020-12-23 00:07:47,841 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 00:07:47,843 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:07:47,854 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:07:47,855 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 23 [2020-12-23 00:07:47,861 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-23 00:07:47,913 INFO L625 ElimStorePlain]: treesize reduction 1, result has 96.9 percent of original size [2020-12-23 00:07:47,917 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 2 xjuncts. [2020-12-23 00:07:47,918 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:69, output treesize:18 [2020-12-23 00:07:48,048 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 13 proven. 19 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2020-12-23 00:07:48,049 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:07:48,049 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 14 [2020-12-23 00:07:48,053 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045655963] [2020-12-23 00:07:48,055 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-23 00:07:48,055 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:07:48,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-23 00:07:48,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2020-12-23 00:07:48,056 INFO L87 Difference]: Start difference. First operand 75 states and 101 transitions. Second operand 14 states. [2020-12-23 00:07:48,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:07:48,896 INFO L93 Difference]: Finished difference Result 290 states and 416 transitions. [2020-12-23 00:07:48,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-12-23 00:07:48,897 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 58 [2020-12-23 00:07:48,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:07:48,900 INFO L225 Difference]: With dead ends: 290 [2020-12-23 00:07:48,900 INFO L226 Difference]: Without dead ends: 226 [2020-12-23 00:07:48,902 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=347, Invalid=775, Unknown=0, NotChecked=0, Total=1122 [2020-12-23 00:07:48,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2020-12-23 00:07:48,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 204. [2020-12-23 00:07:48,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204 states. [2020-12-23 00:07:48,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 285 transitions. [2020-12-23 00:07:48,923 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 285 transitions. Word has length 58 [2020-12-23 00:07:48,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:07:48,924 INFO L481 AbstractCegarLoop]: Abstraction has 204 states and 285 transitions. [2020-12-23 00:07:48,924 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-23 00:07:48,924 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 285 transitions. [2020-12-23 00:07:48,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-12-23 00:07:48,927 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:07:48,927 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:07:49,140 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:07:49,141 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:07:49,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:07:49,142 INFO L82 PathProgramCache]: Analyzing trace with hash -937413107, now seen corresponding path program 1 times [2020-12-23 00:07:49,143 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:07:49,143 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176801170] [2020-12-23 00:07:49,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:07:49,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:07:49,345 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 224 trivial. 0 not checked. [2020-12-23 00:07:49,347 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176801170] [2020-12-23 00:07:49,347 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [358565842] [2020-12-23 00:07:49,347 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 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:07:49,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:07:49,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-23 00:07:49,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:07:49,585 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 224 trivial. 0 not checked. [2020-12-23 00:07:49,586 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:07:49,586 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-12-23 00:07:49,586 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369787100] [2020-12-23 00:07:49,587 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-23 00:07:49,587 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:07:49,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-23 00:07:49,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-23 00:07:49,588 INFO L87 Difference]: Start difference. First operand 204 states and 285 transitions. Second operand 11 states. [2020-12-23 00:07:49,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:07:49,784 INFO L93 Difference]: Finished difference Result 472 states and 660 transitions. [2020-12-23 00:07:49,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-23 00:07:49,785 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 94 [2020-12-23 00:07:49,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:07:49,787 INFO L225 Difference]: With dead ends: 472 [2020-12-23 00:07:49,787 INFO L226 Difference]: Without dead ends: 285 [2020-12-23 00:07:49,791 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-23 00:07:49,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2020-12-23 00:07:49,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 231. [2020-12-23 00:07:49,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 231 states. [2020-12-23 00:07:49,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 323 transitions. [2020-12-23 00:07:49,818 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 323 transitions. Word has length 94 [2020-12-23 00:07:49,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:07:49,819 INFO L481 AbstractCegarLoop]: Abstraction has 231 states and 323 transitions. [2020-12-23 00:07:49,819 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-23 00:07:49,819 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 323 transitions. [2020-12-23 00:07:49,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-12-23 00:07:49,821 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:07:49,821 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:07:50,034 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:07:50,035 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:07:50,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:07:50,036 INFO L82 PathProgramCache]: Analyzing trace with hash 1234891020, now seen corresponding path program 2 times [2020-12-23 00:07:50,036 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:07:50,037 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26375543] [2020-12-23 00:07:50,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:07:50,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:07:50,305 INFO L134 CoverageAnalysis]: Checked inductivity of 360 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 296 trivial. 0 not checked. [2020-12-23 00:07:50,306 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26375543] [2020-12-23 00:07:50,306 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1210927807] [2020-12-23 00:07:50,306 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:07:50,414 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 00:07:50,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:07:50,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-23 00:07:50,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:07:50,528 INFO L134 CoverageAnalysis]: Checked inductivity of 360 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 296 trivial. 0 not checked. [2020-12-23 00:07:50,528 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:07:50,528 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-12-23 00:07:50,529 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942057989] [2020-12-23 00:07:50,529 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-23 00:07:50,530 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:07:50,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-23 00:07:50,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-12-23 00:07:50,531 INFO L87 Difference]: Start difference. First operand 231 states and 323 transitions. Second operand 12 states. [2020-12-23 00:07:50,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:07:50,731 INFO L93 Difference]: Finished difference Result 524 states and 734 transitions. [2020-12-23 00:07:50,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-23 00:07:50,731 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 106 [2020-12-23 00:07:50,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:07:50,733 INFO L225 Difference]: With dead ends: 524 [2020-12-23 00:07:50,733 INFO L226 Difference]: Without dead ends: 312 [2020-12-23 00:07:50,734 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-12-23 00:07:50,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2020-12-23 00:07:50,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 258. [2020-12-23 00:07:50,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 258 states. [2020-12-23 00:07:50,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 361 transitions. [2020-12-23 00:07:50,768 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 361 transitions. Word has length 106 [2020-12-23 00:07:50,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:07:50,768 INFO L481 AbstractCegarLoop]: Abstraction has 258 states and 361 transitions. [2020-12-23 00:07:50,768 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-23 00:07:50,769 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 361 transitions. [2020-12-23 00:07:50,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2020-12-23 00:07:50,782 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:07:50,782 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:07:50,982 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:07:50,983 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:07:50,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:07:50,984 INFO L82 PathProgramCache]: Analyzing trace with hash -967925327, now seen corresponding path program 3 times [2020-12-23 00:07:50,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:07:50,985 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946478992] [2020-12-23 00:07:50,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:07:51,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:07:51,195 INFO L134 CoverageAnalysis]: Checked inductivity of 459 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2020-12-23 00:07:51,195 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946478992] [2020-12-23 00:07:51,196 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [597774948] [2020-12-23 00:07:51,196 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:07:51,287 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-12-23 00:07:51,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:07:51,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-23 00:07:51,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:07:51,332 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 00:07:51,333 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:07:51,335 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:07:51,336 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:07:51,336 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:11 [2020-12-23 00:07:51,400 INFO L348 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2020-12-23 00:07:51,401 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 28 treesize of output 27 [2020-12-23 00:07:51,403 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:07:51,410 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:07:51,411 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:07:51,411 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:27 [2020-12-23 00:07:51,824 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 00:07:51,828 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-23 00:07:51,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:07:51,860 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:07:51,861 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 43 [2020-12-23 00:07:51,863 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:07:51,889 INFO L348 Elim1Store]: treesize reduction 17, result has 66.7 percent of original size [2020-12-23 00:07:51,889 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 44 [2020-12-23 00:07:51,892 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 00:07:51,892 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 00:07:51,895 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-23 00:07:51,941 INFO L625 ElimStorePlain]: treesize reduction 1, result has 97.2 percent of original size [2020-12-23 00:07:51,945 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 3 xjuncts. [2020-12-23 00:07:51,946 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:87, output treesize:17 [2020-12-23 00:07:52,154 INFO L134 CoverageAnalysis]: Checked inductivity of 459 backedges. 39 proven. 101 refuted. 0 times theorem prover too weak. 319 trivial. 0 not checked. [2020-12-23 00:07:52,154 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:07:52,154 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2020-12-23 00:07:52,155 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589489887] [2020-12-23 00:07:52,156 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-12-23 00:07:52,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:07:52,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-12-23 00:07:52,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=358, Unknown=0, NotChecked=0, Total=506 [2020-12-23 00:07:52,158 INFO L87 Difference]: Start difference. First operand 258 states and 361 transitions. Second operand 23 states. [2020-12-23 00:07:55,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:07:55,910 INFO L93 Difference]: Finished difference Result 890 states and 1256 transitions. [2020-12-23 00:07:55,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2020-12-23 00:07:55,910 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 118 [2020-12-23 00:07:55,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:07:55,914 INFO L225 Difference]: With dead ends: 890 [2020-12-23 00:07:55,914 INFO L226 Difference]: Without dead ends: 653 [2020-12-23 00:07:55,919 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2647 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=1857, Invalid=6333, Unknown=0, NotChecked=0, Total=8190 [2020-12-23 00:07:55,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 653 states. [2020-12-23 00:07:55,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 653 to 516. [2020-12-23 00:07:55,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 516 states. [2020-12-23 00:07:55,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 516 states to 516 states and 731 transitions. [2020-12-23 00:07:55,941 INFO L78 Accepts]: Start accepts. Automaton has 516 states and 731 transitions. Word has length 118 [2020-12-23 00:07:55,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:07:55,941 INFO L481 AbstractCegarLoop]: Abstraction has 516 states and 731 transitions. [2020-12-23 00:07:55,942 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-12-23 00:07:55,942 INFO L276 IsEmpty]: Start isEmpty. Operand 516 states and 731 transitions. [2020-12-23 00:07:55,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2020-12-23 00:07:55,944 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:07:55,945 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:07:56,159 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:07:56,160 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:07:56,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:07:56,161 INFO L82 PathProgramCache]: Analyzing trace with hash -1090307401, now seen corresponding path program 4 times [2020-12-23 00:07:56,162 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:07:56,162 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617688423] [2020-12-23 00:07:56,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:07:56,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:07:56,539 INFO L134 CoverageAnalysis]: Checked inductivity of 975 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 806 trivial. 0 not checked. [2020-12-23 00:07:56,540 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617688423] [2020-12-23 00:07:56,540 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1390608837] [2020-12-23 00:07:56,540 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 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:07:56,644 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 00:07:56,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:07:56,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 63 conjunts are in the unsatisfiable core [2020-12-23 00:07:56,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:07:56,835 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 00:07:56,836 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:07:56,841 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:07:56,841 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:07:56,842 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:15 [2020-12-23 00:07:56,902 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:07:56,903 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 00:07:56,905 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:07:56,924 INFO L625 ElimStorePlain]: treesize reduction 22, result has 52.2 percent of original size [2020-12-23 00:07:56,924 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:07:56,925 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:24 [2020-12-23 00:07:57,004 INFO L348 Elim1Store]: treesize reduction 64, result has 22.9 percent of original size [2020-12-23 00:07:57,004 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 32 treesize of output 34 [2020-12-23 00:07:57,006 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:07:57,012 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:07:57,013 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:07:57,013 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:28 [2020-12-23 00:07:57,827 INFO L134 CoverageAnalysis]: Checked inductivity of 975 backedges. 197 proven. 592 refuted. 0 times theorem prover too weak. 186 trivial. 0 not checked. [2020-12-23 00:07:57,827 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:07:57,828 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 30] total 43 [2020-12-23 00:07:57,828 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347383655] [2020-12-23 00:07:57,829 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-12-23 00:07:57,829 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:07:57,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-12-23 00:07:57,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=402, Invalid=1404, Unknown=0, NotChecked=0, Total=1806 [2020-12-23 00:07:57,831 INFO L87 Difference]: Start difference. First operand 516 states and 731 transitions. Second operand 43 states. [2020-12-23 00:08:00,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:08:00,120 INFO L93 Difference]: Finished difference Result 1471 states and 2083 transitions. [2020-12-23 00:08:00,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-12-23 00:08:00,121 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 166 [2020-12-23 00:08:00,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:08:00,127 INFO L225 Difference]: With dead ends: 1471 [2020-12-23 00:08:00,127 INFO L226 Difference]: Without dead ends: 984 [2020-12-23 00:08:00,129 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 846 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=434, Invalid=1636, Unknown=0, NotChecked=0, Total=2070 [2020-12-23 00:08:00,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 984 states. [2020-12-23 00:08:00,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 984 to 680. [2020-12-23 00:08:00,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 680 states. [2020-12-23 00:08:00,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 680 states to 680 states and 966 transitions. [2020-12-23 00:08:00,162 INFO L78 Accepts]: Start accepts. Automaton has 680 states and 966 transitions. Word has length 166 [2020-12-23 00:08:00,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:08:00,163 INFO L481 AbstractCegarLoop]: Abstraction has 680 states and 966 transitions. [2020-12-23 00:08:00,163 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-12-23 00:08:00,163 INFO L276 IsEmpty]: Start isEmpty. Operand 680 states and 966 transitions. [2020-12-23 00:08:00,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2020-12-23 00:08:00,166 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:08:00,167 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 11, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:08:00,380 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-12-23 00:08:00,381 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:08:00,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:08:00,382 INFO L82 PathProgramCache]: Analyzing trace with hash -1067722828, now seen corresponding path program 5 times [2020-12-23 00:08:00,382 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:08:00,383 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012372106] [2020-12-23 00:08:00,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:08:00,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:08:00,730 INFO L134 CoverageAnalysis]: Checked inductivity of 1134 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 938 trivial. 0 not checked. [2020-12-23 00:08:00,730 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012372106] [2020-12-23 00:08:00,730 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [531221483] [2020-12-23 00:08:00,731 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 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:08:09,708 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2020-12-23 00:08:09,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:08:09,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 485 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-23 00:08:09,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:08:09,909 INFO L134 CoverageAnalysis]: Checked inductivity of 1134 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 847 trivial. 0 not checked. [2020-12-23 00:08:09,909 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:08:09,910 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-12-23 00:08:09,910 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10048709] [2020-12-23 00:08:09,911 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-23 00:08:09,911 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:08:09,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-23 00:08:09,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-12-23 00:08:09,912 INFO L87 Difference]: Start difference. First operand 680 states and 966 transitions. Second operand 18 states. [2020-12-23 00:08:10,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:08:10,276 INFO L93 Difference]: Finished difference Result 1566 states and 2226 transitions. [2020-12-23 00:08:10,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-23 00:08:10,277 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 178 [2020-12-23 00:08:10,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:08:10,282 INFO L225 Difference]: With dead ends: 1566 [2020-12-23 00:08:10,282 INFO L226 Difference]: Without dead ends: 917 [2020-12-23 00:08:10,284 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-12-23 00:08:10,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 917 states. [2020-12-23 00:08:10,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 917 to 721. [2020-12-23 00:08:10,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 721 states. [2020-12-23 00:08:10,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 721 states to 721 states and 1024 transitions. [2020-12-23 00:08:10,316 INFO L78 Accepts]: Start accepts. Automaton has 721 states and 1024 transitions. Word has length 178 [2020-12-23 00:08:10,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:08:10,317 INFO L481 AbstractCegarLoop]: Abstraction has 721 states and 1024 transitions. [2020-12-23 00:08:10,317 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-23 00:08:10,317 INFO L276 IsEmpty]: Start isEmpty. Operand 721 states and 1024 transitions. [2020-12-23 00:08:10,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2020-12-23 00:08:10,320 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:08:10,320 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:08:10,521 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:08:10,522 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:08:10,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:08:10,523 INFO L82 PathProgramCache]: Analyzing trace with hash -1455991971, now seen corresponding path program 6 times [2020-12-23 00:08:10,523 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:08:10,523 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560458688] [2020-12-23 00:08:10,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:08:10,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:08:10,798 INFO L134 CoverageAnalysis]: Checked inductivity of 1305 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 1080 trivial. 0 not checked. [2020-12-23 00:08:10,799 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560458688] [2020-12-23 00:08:10,799 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [25722760] [2020-12-23 00:08:10,799 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 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:08:11,206 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-12-23 00:08:11,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:08:11,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-23 00:08:11,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:08:11,283 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 00:08:11,284 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:08:11,287 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:08:11,287 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:08:11,287 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:11 [2020-12-23 00:08:11,333 INFO L348 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2020-12-23 00:08:11,333 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 28 treesize of output 27 [2020-12-23 00:08:11,335 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:08:11,340 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:08:11,341 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:08:11,341 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:24 [2020-12-23 00:08:11,456 INFO L348 Elim1Store]: treesize reduction 96, result has 20.7 percent of original size [2020-12-23 00:08:11,457 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 40 treesize of output 42 [2020-12-23 00:08:11,460 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:08:11,469 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:08:11,469 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:08:11,470 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:43, output treesize:39 [2020-12-23 00:08:14,042 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-23 00:08:14,045 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2020-12-23 00:08:14,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:08:14,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:08:14,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:08:14,088 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:08:14,088 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 64 [2020-12-23 00:08:14,090 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-23 00:08:14,092 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 00:08:14,093 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 00:08:14,095 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:08:14,132 INFO L348 Elim1Store]: treesize reduction 52, result has 49.5 percent of original size [2020-12-23 00:08:14,133 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 47 treesize of output 63 [2020-12-23 00:08:14,135 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-23 00:08:14,177 INFO L625 ElimStorePlain]: treesize reduction 1, result has 97.8 percent of original size [2020-12-23 00:08:14,181 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 3 xjuncts. [2020-12-23 00:08:14,181 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:111, output treesize:23 [2020-12-23 00:08:14,600 INFO L134 CoverageAnalysis]: Checked inductivity of 1305 backedges. 106 proven. 266 refuted. 0 times theorem prover too weak. 933 trivial. 0 not checked. [2020-12-23 00:08:14,601 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:08:14,601 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 32 [2020-12-23 00:08:14,601 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136996055] [2020-12-23 00:08:14,602 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-12-23 00:08:14,602 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:08:14,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-12-23 00:08:14,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=293, Invalid=698, Unknown=1, NotChecked=0, Total=992 [2020-12-23 00:08:14,603 INFO L87 Difference]: Start difference. First operand 721 states and 1024 transitions. Second operand 32 states. [2020-12-23 00:08:30,231 WARN L197 SmtUtils]: Spent 3.02 s on a formula simplification. DAG size of input: 37 DAG size of output: 36 [2020-12-23 00:08:47,858 WARN L197 SmtUtils]: Spent 4.03 s on a formula simplification. DAG size of input: 36 DAG size of output: 35 [2020-12-23 00:09:04,190 WARN L197 SmtUtils]: Spent 2.04 s on a formula simplification. DAG size of input: 37 DAG size of output: 36 [2020-12-23 00:09:22,518 WARN L197 SmtUtils]: Spent 4.03 s on a formula simplification. DAG size of input: 37 DAG size of output: 36 [2020-12-23 00:09:44,891 WARN L197 SmtUtils]: Spent 4.04 s on a formula simplification. DAG size of input: 37 DAG size of output: 36 [2020-12-23 00:10:13,305 WARN L197 SmtUtils]: Spent 4.04 s on a formula simplification. DAG size of input: 37 DAG size of output: 36 [2020-12-23 00:10:27,361 WARN L197 SmtUtils]: Spent 2.29 s on a formula simplification. DAG size of input: 37 DAG size of output: 36 [2020-12-23 00:10:49,683 WARN L197 SmtUtils]: Spent 4.04 s on a formula simplification. DAG size of input: 37 DAG size of output: 36 [2020-12-23 00:11:06,188 WARN L197 SmtUtils]: Spent 4.03 s on a formula simplification. DAG size of input: 37 DAG size of output: 36 [2020-12-23 00:11:38,715 WARN L197 SmtUtils]: Spent 4.03 s on a formula simplification. DAG size of input: 37 DAG size of output: 36 [2020-12-23 00:12:05,337 WARN L197 SmtUtils]: Spent 4.03 s on a formula simplification. DAG size of input: 37 DAG size of output: 36