/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-tiling/pr2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-178dd20 [2021-01-06 10:23:58,434 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-06 10:23:58,443 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-06 10:23:58,529 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-01-06 10:23:58,530 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-01-06 10:23:58,537 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-01-06 10:23:58,543 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-01-06 10:23:58,549 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-01-06 10:23:58,579 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-01-06 10:23:58,582 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-01-06 10:23:58,589 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-01-06 10:23:58,592 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-01-06 10:23:58,593 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-06 10:23:58,602 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-06 10:23:58,605 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-06 10:23:58,608 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-06 10:23:58,610 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-06 10:23:58,615 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-06 10:23:58,625 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-06 10:23:58,635 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-06 10:23:58,637 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-06 10:23:58,641 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-06 10:23:58,643 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-06 10:23:58,645 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-06 10:23:58,659 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-01-06 10:23:58,686 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-06 10:23:58,688 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-06 10:23:58,689 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-06 10:23:58,696 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-01-06 10:23:58,765 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-06 10:23:58,765 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-06 10:23:58,773 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-06 10:23:58,773 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-06 10:23:58,774 INFO L138 SettingsManager]: * Use SBE=true [2021-01-06 10:23:58,774 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-06 10:23:58,774 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-06 10:23:58,774 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-06 10:23:58,774 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-01-06 10:23:58,775 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-06 10:23:58,777 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-01-06 10:23:58,778 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-01-06 10:23:58,778 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-06 10:23:58,778 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-01-06 10:23:58,779 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-06 10:23:58,779 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-06 10:23:58,779 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-06 10:23:58,779 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 10:23:58,780 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-06 10:23:58,780 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-06 10:23:58,780 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-01-06 10:23:58,780 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-06 10:23:58,780 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-06 10:23:58,781 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-01-06 10:23:58,781 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-01-06 10:23:58,781 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-06 10:23:59,286 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-06 10:23:59,328 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-06 10:23:59,333 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-06 10:23:59,335 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-06 10:23:59,337 INFO L275 PluginConnector]: CDTParser initialized [2021-01-06 10:23:59,338 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-tiling/pr2.c [2021-01-06 10:23:59,444 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/aa8d5f7e6/2b69a93d62af474d8a1be2ce9bf0ed53/FLAG4ede27edd [2021-01-06 10:24:00,344 INFO L306 CDTParser]: Found 1 translation units. [2021-01-06 10:24:00,344 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-tiling/pr2.c [2021-01-06 10:24:00,355 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/aa8d5f7e6/2b69a93d62af474d8a1be2ce9bf0ed53/FLAG4ede27edd [2021-01-06 10:24:00,642 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/aa8d5f7e6/2b69a93d62af474d8a1be2ce9bf0ed53 [2021-01-06 10:24:00,651 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-06 10:24:00,654 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-01-06 10:24:00,660 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-06 10:24:00,660 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-06 10:24:00,666 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-06 10:24:00,668 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 10:24:00" (1/1) ... [2021-01-06 10:24:00,673 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7d45929d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:24:00, skipping insertion in model container [2021-01-06 10:24:00,673 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 10:24:00" (1/1) ... [2021-01-06 10:24:00,688 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-06 10:24:00,712 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-01-06 10:24:01,006 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-tiling/pr2.c[394,407] left hand side expression in assignment: lhs: VariableLHS[~CELLCOUNT~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~volArray~0,],[BinaryExpression[ARITHMINUS,BinaryExpression[ARITHMUL,IntegerLiteral[2],IdentifierExpression[~i~0,]],IntegerLiteral[2]]]] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~volArray~0,],[BinaryExpression[ARITHMINUS,BinaryExpression[ARITHMUL,IntegerLiteral[2],IdentifierExpression[~i~0,]],IntegerLiteral[2]]]] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~volArray~0,],[BinaryExpression[ARITHMINUS,BinaryExpression[ARITHMUL,IntegerLiteral[2],IdentifierExpression[~i~0,]],IntegerLiteral[1]]]] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~volArray~0,],[BinaryExpression[ARITHMINUS,BinaryExpression[ARITHMUL,IntegerLiteral[2],IdentifierExpression[~i~0,]],IntegerLiteral[1]]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] [2021-01-06 10:24:01,043 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 10:24:01,060 INFO L203 MainTranslator]: Completed pre-run [2021-01-06 10:24:01,088 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-tiling/pr2.c[394,407] left hand side expression in assignment: lhs: VariableLHS[~CELLCOUNT~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#volArray~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#volArray~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],BinaryExpression[ARITHMINUS,BinaryExpression[ARITHMUL,IntegerLiteral[2],IdentifierExpression[~i~0,]],IntegerLiteral[2]]]]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#volArray~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#volArray~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],BinaryExpression[ARITHMINUS,BinaryExpression[ARITHMUL,IntegerLiteral[2],IdentifierExpression[~i~0,]],IntegerLiteral[2]]]]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#volArray~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#volArray~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],BinaryExpression[ARITHMINUS,BinaryExpression[ARITHMUL,IntegerLiteral[2],IdentifierExpression[~i~0,]],IntegerLiteral[1]]]]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#volArray~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#volArray~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],BinaryExpression[ARITHMINUS,BinaryExpression[ARITHMUL,IntegerLiteral[2],IdentifierExpression[~i~0,]],IntegerLiteral[1]]]]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] [2021-01-06 10:24:01,128 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 10:24:01,163 INFO L208 MainTranslator]: Completed translation [2021-01-06 10:24:01,165 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:24:01 WrapperNode [2021-01-06 10:24:01,165 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-06 10:24:01,169 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-06 10:24:01,171 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-06 10:24:01,172 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-06 10:24:01,186 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:24:01" (1/1) ... [2021-01-06 10:24:01,215 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:24:01" (1/1) ... [2021-01-06 10:24:01,271 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-06 10:24:01,273 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-06 10:24:01,273 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-06 10:24:01,273 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-06 10:24:01,290 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:24:01" (1/1) ... [2021-01-06 10:24:01,291 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:24:01" (1/1) ... [2021-01-06 10:24:01,294 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:24:01" (1/1) ... [2021-01-06 10:24:01,295 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:24:01" (1/1) ... [2021-01-06 10:24:01,304 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:24:01" (1/1) ... [2021-01-06 10:24:01,312 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:24:01" (1/1) ... [2021-01-06 10:24:01,314 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:24:01" (1/1) ... [2021-01-06 10:24:01,317 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-06 10:24:01,319 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-06 10:24:01,319 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-06 10:24:01,319 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-06 10:24:01,321 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:24:01" (1/1) ... No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 10:24:01,477 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-06 10:24:01,478 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-06 10:24:01,478 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-01-06 10:24:01,478 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-06 10:24:01,479 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-06 10:24:01,479 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-01-06 10:24:01,479 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-01-06 10:24:01,999 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-06 10:24:02,000 INFO L299 CfgBuilder]: Removed 10 assume(true) statements. [2021-01-06 10:24:02,002 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 10:24:02 BoogieIcfgContainer [2021-01-06 10:24:02,003 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-06 10:24:02,005 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-06 10:24:02,006 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-06 10:24:02,011 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-06 10:24:02,012 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.01 10:24:00" (1/3) ... [2021-01-06 10:24:02,013 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@182a73ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 10:24:02, skipping insertion in model container [2021-01-06 10:24:02,014 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:24:01" (2/3) ... [2021-01-06 10:24:02,014 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@182a73ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 10:24:02, skipping insertion in model container [2021-01-06 10:24:02,014 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 10:24:02" (3/3) ... [2021-01-06 10:24:02,017 INFO L111 eAbstractionObserver]: Analyzing ICFG pr2.c [2021-01-06 10:24:02,028 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-06 10:24:02,035 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-01-06 10:24:02,060 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-01-06 10:24:02,095 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-06 10:24:02,095 INFO L378 AbstractCegarLoop]: Hoare is true [2021-01-06 10:24:02,095 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-06 10:24:02,096 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-06 10:24:02,096 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-06 10:24:02,096 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-06 10:24:02,096 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-01-06 10:24:02,097 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-06 10:24:02,126 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2021-01-06 10:24:02,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-01-06 10:24:02,137 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:24:02,138 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:24:02,139 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:24:02,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:24:02,148 INFO L82 PathProgramCache]: Analyzing trace with hash -583465863, now seen corresponding path program 1 times [2021-01-06 10:24:02,160 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:24:02,161 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684711131] [2021-01-06 10:24:02,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:24:02,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:24:02,427 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:24:02,428 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684711131] [2021-01-06 10:24:02,431 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 10:24:02,431 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-01-06 10:24:02,432 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182038634] [2021-01-06 10:24:02,437 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-01-06 10:24:02,438 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:24:02,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-01-06 10:24:02,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-01-06 10:24:02,465 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 2 states. [2021-01-06 10:24:02,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:24:02,491 INFO L93 Difference]: Finished difference Result 43 states and 60 transitions. [2021-01-06 10:24:02,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-01-06 10:24:02,492 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 13 [2021-01-06 10:24:02,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:24:02,514 INFO L225 Difference]: With dead ends: 43 [2021-01-06 10:24:02,514 INFO L226 Difference]: Without dead ends: 19 [2021-01-06 10:24:02,520 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-01-06 10:24:02,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-01-06 10:24:02,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-01-06 10:24:02,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2021-01-06 10:24:02,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2021-01-06 10:24:02,574 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 13 [2021-01-06 10:24:02,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:24:02,575 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2021-01-06 10:24:02,575 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2021-01-06 10:24:02,576 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2021-01-06 10:24:02,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-01-06 10:24:02,578 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:24:02,578 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:24:02,578 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-01-06 10:24:02,580 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:24:02,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:24:02,582 INFO L82 PathProgramCache]: Analyzing trace with hash 96592507, now seen corresponding path program 1 times [2021-01-06 10:24:02,583 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:24:02,584 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472251116] [2021-01-06 10:24:02,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:24:02,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:24:02,825 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:24:02,829 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472251116] [2021-01-06 10:24:02,829 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 10:24:02,830 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-01-06 10:24:02,831 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618837268] [2021-01-06 10:24:02,832 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-01-06 10:24:02,833 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:24:02,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-01-06 10:24:02,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-01-06 10:24:02,834 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand 4 states. [2021-01-06 10:24:02,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:24:02,945 INFO L93 Difference]: Finished difference Result 28 states and 33 transitions. [2021-01-06 10:24:02,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-06 10:24:02,947 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2021-01-06 10:24:02,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:24:02,948 INFO L225 Difference]: With dead ends: 28 [2021-01-06 10:24:02,948 INFO L226 Difference]: Without dead ends: 26 [2021-01-06 10:24:02,949 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-01-06 10:24:02,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-01-06 10:24:02,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 21. [2021-01-06 10:24:02,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2021-01-06 10:24:02,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2021-01-06 10:24:02,956 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 13 [2021-01-06 10:24:02,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:24:02,956 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2021-01-06 10:24:02,956 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-01-06 10:24:02,956 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2021-01-06 10:24:02,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-01-06 10:24:02,957 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:24:02,957 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:24:02,958 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-01-06 10:24:02,958 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:24:02,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:24:02,959 INFO L82 PathProgramCache]: Analyzing trace with hash 96652089, now seen corresponding path program 1 times [2021-01-06 10:24:02,960 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:24:02,960 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037978939] [2021-01-06 10:24:02,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:24:02,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:24:03,137 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:24:03,138 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037978939] [2021-01-06 10:24:03,138 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 10:24:03,138 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-01-06 10:24:03,139 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939879504] [2021-01-06 10:24:03,139 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 10:24:03,139 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:24:03,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 10:24:03,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-01-06 10:24:03,141 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 5 states. [2021-01-06 10:24:03,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:24:03,222 INFO L93 Difference]: Finished difference Result 36 states and 44 transitions. [2021-01-06 10:24:03,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-06 10:24:03,224 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2021-01-06 10:24:03,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:24:03,225 INFO L225 Difference]: With dead ends: 36 [2021-01-06 10:24:03,225 INFO L226 Difference]: Without dead ends: 25 [2021-01-06 10:24:03,226 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-01-06 10:24:03,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-01-06 10:24:03,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 22. [2021-01-06 10:24:03,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2021-01-06 10:24:03,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2021-01-06 10:24:03,233 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 13 [2021-01-06 10:24:03,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:24:03,233 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2021-01-06 10:24:03,233 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 10:24:03,234 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2021-01-06 10:24:03,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-01-06 10:24:03,235 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:24:03,235 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:24:03,235 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-01-06 10:24:03,235 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:24:03,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:24:03,236 INFO L82 PathProgramCache]: Analyzing trace with hash 37256114, now seen corresponding path program 1 times [2021-01-06 10:24:03,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:24:03,237 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450240438] [2021-01-06 10:24:03,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:24:03,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:24:03,688 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:24:03,689 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450240438] [2021-01-06 10:24:03,689 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [512854454] [2021-01-06 10:24:03,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:24:03,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:24:03,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-06 10:24:03,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:24:04,161 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 16 treesize of output 12 [2021-01-06 10:24:04,165 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:24:04,184 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:24:04,191 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:24:04,192 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:19 [2021-01-06 10:24:04,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:24:04,291 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-01-06 10:24:04,307 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:24:04,320 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:24:04,324 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:24:04,325 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:24, output treesize:11 [2021-01-06 10:24:04,481 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:24:04,517 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:24:04,570 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:24:04,571 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:24:04,572 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 15 [2021-01-06 10:24:04,572 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847411734] [2021-01-06 10:24:04,573 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-01-06 10:24:04,574 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:24:04,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-01-06 10:24:04,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-01-06 10:24:04,581 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand 15 states. [2021-01-06 10:24:05,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:24:05,796 INFO L93 Difference]: Finished difference Result 103 states and 122 transitions. [2021-01-06 10:24:05,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-01-06 10:24:05,796 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 17 [2021-01-06 10:24:05,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:24:05,804 INFO L225 Difference]: With dead ends: 103 [2021-01-06 10:24:05,805 INFO L226 Difference]: Without dead ends: 93 [2021-01-06 10:24:05,808 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=220, Invalid=650, Unknown=0, NotChecked=0, Total=870 [2021-01-06 10:24:05,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-01-06 10:24:05,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 29. [2021-01-06 10:24:05,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2021-01-06 10:24:05,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 36 transitions. [2021-01-06 10:24:05,837 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 36 transitions. Word has length 17 [2021-01-06 10:24:05,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:24:05,838 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 36 transitions. [2021-01-06 10:24:05,838 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2021-01-06 10:24:05,838 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 36 transitions. [2021-01-06 10:24:05,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-01-06 10:24:05,841 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:24:05,841 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:24:06,056 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:24:06,058 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:24:06,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:24:06,059 INFO L82 PathProgramCache]: Analyzing trace with hash -355770896, now seen corresponding path program 1 times [2021-01-06 10:24:06,060 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:24:06,060 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963341722] [2021-01-06 10:24:06,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:24:06,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:24:06,129 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:24:06,131 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963341722] [2021-01-06 10:24:06,132 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 10:24:06,132 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-01-06 10:24:06,132 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226301257] [2021-01-06 10:24:06,133 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-01-06 10:24:06,133 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:24:06,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-01-06 10:24:06,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-01-06 10:24:06,134 INFO L87 Difference]: Start difference. First operand 29 states and 36 transitions. Second operand 4 states. [2021-01-06 10:24:06,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:24:06,185 INFO L93 Difference]: Finished difference Result 54 states and 66 transitions. [2021-01-06 10:24:06,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-01-06 10:24:06,188 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2021-01-06 10:24:06,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:24:06,190 INFO L225 Difference]: With dead ends: 54 [2021-01-06 10:24:06,190 INFO L226 Difference]: Without dead ends: 39 [2021-01-06 10:24:06,193 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-01-06 10:24:06,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-01-06 10:24:06,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 29. [2021-01-06 10:24:06,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2021-01-06 10:24:06,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 35 transitions. [2021-01-06 10:24:06,227 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 35 transitions. Word has length 17 [2021-01-06 10:24:06,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:24:06,227 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 35 transitions. [2021-01-06 10:24:06,227 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-01-06 10:24:06,227 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 35 transitions. [2021-01-06 10:24:06,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-01-06 10:24:06,230 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:24:06,230 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:24:06,230 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-01-06 10:24:06,231 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:24:06,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:24:06,231 INFO L82 PathProgramCache]: Analyzing trace with hash 324287474, now seen corresponding path program 1 times [2021-01-06 10:24:06,232 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:24:06,232 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247649421] [2021-01-06 10:24:06,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:24:06,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:24:06,431 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:24:06,432 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247649421] [2021-01-06 10:24:06,432 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1351963441] [2021-01-06 10:24:06,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:24:06,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:24:06,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-01-06 10:24:06,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:24:06,521 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 16 treesize of output 12 [2021-01-06 10:24:06,523 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:24:06,531 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:24:06,533 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:24:06,533 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:23 [2021-01-06 10:24:06,556 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 0 case distinctions, treesize of input 49 treesize of output 44 [2021-01-06 10:24:06,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:24:06,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:24:06,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:24:06,571 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 36 [2021-01-06 10:24:06,573 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-01-06 10:24:06,581 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:24:06,582 INFO L547 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:24:06,599 INFO L625 ElimStorePlain]: treesize reduction 5, result has 87.8 percent of original size [2021-01-06 10:24:06,601 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:24:06,601 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:57, output treesize:36 [2021-01-06 10:24:06,695 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:24:06,696 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:24:06,696 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-01-06 10:24:06,696 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327485902] [2021-01-06 10:24:06,697 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-01-06 10:24:06,697 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:24:06,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-01-06 10:24:06,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-01-06 10:24:06,698 INFO L87 Difference]: Start difference. First operand 29 states and 35 transitions. Second operand 12 states. [2021-01-06 10:24:07,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:24:07,282 INFO L93 Difference]: Finished difference Result 83 states and 100 transitions. [2021-01-06 10:24:07,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-01-06 10:24:07,283 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 17 [2021-01-06 10:24:07,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:24:07,284 INFO L225 Difference]: With dead ends: 83 [2021-01-06 10:24:07,284 INFO L226 Difference]: Without dead ends: 81 [2021-01-06 10:24:07,285 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=195, Invalid=507, Unknown=0, NotChecked=0, Total=702 [2021-01-06 10:24:07,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-01-06 10:24:07,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 43. [2021-01-06 10:24:07,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2021-01-06 10:24:07,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 54 transitions. [2021-01-06 10:24:07,294 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 54 transitions. Word has length 17 [2021-01-06 10:24:07,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:24:07,295 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 54 transitions. [2021-01-06 10:24:07,295 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2021-01-06 10:24:07,295 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 54 transitions. [2021-01-06 10:24:07,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-01-06 10:24:07,296 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:24:07,296 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:24:07,509 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:24:07,510 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:24:07,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:24:07,512 INFO L82 PathProgramCache]: Analyzing trace with hash -2078603285, now seen corresponding path program 1 times [2021-01-06 10:24:07,512 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:24:07,513 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122329584] [2021-01-06 10:24:07,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:24:07,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:24:07,554 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:24:07,555 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122329584] [2021-01-06 10:24:07,555 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 10:24:07,555 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 10:24:07,555 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177260603] [2021-01-06 10:24:07,556 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 10:24:07,556 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:24:07,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 10:24:07,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 10:24:07,557 INFO L87 Difference]: Start difference. First operand 43 states and 54 transitions. Second operand 3 states. [2021-01-06 10:24:07,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:24:07,580 INFO L93 Difference]: Finished difference Result 68 states and 83 transitions. [2021-01-06 10:24:07,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 10:24:07,581 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2021-01-06 10:24:07,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:24:07,582 INFO L225 Difference]: With dead ends: 68 [2021-01-06 10:24:07,582 INFO L226 Difference]: Without dead ends: 53 [2021-01-06 10:24:07,583 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 [2021-01-06 10:24:07,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-01-06 10:24:07,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 43. [2021-01-06 10:24:07,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2021-01-06 10:24:07,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 52 transitions. [2021-01-06 10:24:07,591 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 52 transitions. Word has length 21 [2021-01-06 10:24:07,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:24:07,592 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 52 transitions. [2021-01-06 10:24:07,592 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 10:24:07,592 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 52 transitions. [2021-01-06 10:24:07,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-01-06 10:24:07,593 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:24:07,593 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:24:07,593 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-01-06 10:24:07,594 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:24:07,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:24:07,594 INFO L82 PathProgramCache]: Analyzing trace with hash 1011467757, now seen corresponding path program 1 times [2021-01-06 10:24:07,595 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:24:07,595 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836621269] [2021-01-06 10:24:07,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:24:07,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:24:07,668 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:24:07,669 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836621269] [2021-01-06 10:24:07,669 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 10:24:07,669 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 10:24:07,669 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264801673] [2021-01-06 10:24:07,670 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 10:24:07,670 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:24:07,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 10:24:07,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 10:24:07,671 INFO L87 Difference]: Start difference. First operand 43 states and 52 transitions. Second operand 3 states. [2021-01-06 10:24:07,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:24:07,692 INFO L93 Difference]: Finished difference Result 63 states and 74 transitions. [2021-01-06 10:24:07,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 10:24:07,693 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2021-01-06 10:24:07,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:24:07,694 INFO L225 Difference]: With dead ends: 63 [2021-01-06 10:24:07,694 INFO L226 Difference]: Without dead ends: 48 [2021-01-06 10:24:07,695 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 [2021-01-06 10:24:07,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-01-06 10:24:07,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 38. [2021-01-06 10:24:07,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2021-01-06 10:24:07,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 45 transitions. [2021-01-06 10:24:07,703 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 45 transitions. Word has length 21 [2021-01-06 10:24:07,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:24:07,703 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 45 transitions. [2021-01-06 10:24:07,703 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 10:24:07,703 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 45 transitions. [2021-01-06 10:24:07,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-01-06 10:24:07,705 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:24:07,705 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:24:07,705 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-01-06 10:24:07,705 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:24:07,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:24:07,706 INFO L82 PathProgramCache]: Analyzing trace with hash 2125491333, now seen corresponding path program 1 times [2021-01-06 10:24:07,706 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:24:07,707 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907395791] [2021-01-06 10:24:07,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:24:07,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:24:07,969 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:24:07,970 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907395791] [2021-01-06 10:24:07,970 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2015662501] [2021-01-06 10:24:07,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:24:08,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:24:08,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 10:24:08,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:24:08,076 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-01-06 10:24:08,080 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:24:08,085 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:24:08,089 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:24:08,089 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:17, output treesize:9 [2021-01-06 10:24:08,187 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:24:08,196 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:24:08,218 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:24:08,218 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:24:08,219 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 14 [2021-01-06 10:24:08,219 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411105260] [2021-01-06 10:24:08,220 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-01-06 10:24:08,220 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:24:08,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-01-06 10:24:08,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-01-06 10:24:08,221 INFO L87 Difference]: Start difference. First operand 38 states and 45 transitions. Second operand 14 states. [2021-01-06 10:24:08,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:24:08,491 INFO L93 Difference]: Finished difference Result 94 states and 109 transitions. [2021-01-06 10:24:08,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 10:24:08,491 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 23 [2021-01-06 10:24:08,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:24:08,492 INFO L225 Difference]: With dead ends: 94 [2021-01-06 10:24:08,492 INFO L226 Difference]: Without dead ends: 77 [2021-01-06 10:24:08,494 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=107, Invalid=313, Unknown=0, NotChecked=0, Total=420 [2021-01-06 10:24:08,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-01-06 10:24:08,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 50. [2021-01-06 10:24:08,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2021-01-06 10:24:08,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 59 transitions. [2021-01-06 10:24:08,503 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 59 transitions. Word has length 23 [2021-01-06 10:24:08,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:24:08,503 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 59 transitions. [2021-01-06 10:24:08,503 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2021-01-06 10:24:08,503 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 59 transitions. [2021-01-06 10:24:08,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-01-06 10:24:08,504 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:24:08,504 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:24:08,718 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:24:08,719 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:24:08,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:24:08,720 INFO L82 PathProgramCache]: Analyzing trace with hash 845627655, now seen corresponding path program 1 times [2021-01-06 10:24:08,720 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:24:08,721 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185505083] [2021-01-06 10:24:08,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:24:08,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:24:08,972 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:24:08,973 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185505083] [2021-01-06 10:24:08,973 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1974797453] [2021-01-06 10:24:08,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:24:09,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:24:09,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 15 conjunts are in the unsatisfiable core [2021-01-06 10:24:09,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:24:09,125 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-01-06 10:24:09,129 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:24:09,132 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:24:09,133 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:24:09,134 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:9 [2021-01-06 10:24:09,233 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:24:09,234 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:24:09,234 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 15 [2021-01-06 10:24:09,235 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825901413] [2021-01-06 10:24:09,239 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-01-06 10:24:09,239 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:24:09,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-01-06 10:24:09,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-01-06 10:24:09,240 INFO L87 Difference]: Start difference. First operand 50 states and 59 transitions. Second operand 15 states. [2021-01-06 10:24:09,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:24:09,770 INFO L93 Difference]: Finished difference Result 107 states and 123 transitions. [2021-01-06 10:24:09,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-01-06 10:24:09,771 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 23 [2021-01-06 10:24:09,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:24:09,773 INFO L225 Difference]: With dead ends: 107 [2021-01-06 10:24:09,773 INFO L226 Difference]: Without dead ends: 105 [2021-01-06 10:24:09,777 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=250, Invalid=742, Unknown=0, NotChecked=0, Total=992 [2021-01-06 10:24:09,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-01-06 10:24:09,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 57. [2021-01-06 10:24:09,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2021-01-06 10:24:09,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 68 transitions. [2021-01-06 10:24:09,807 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 68 transitions. Word has length 23 [2021-01-06 10:24:09,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:24:09,810 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 68 transitions. [2021-01-06 10:24:09,810 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2021-01-06 10:24:09,810 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 68 transitions. [2021-01-06 10:24:09,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-01-06 10:24:09,813 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:24:09,813 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:24:10,028 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:24:10,029 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:24:10,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:24:10,030 INFO L82 PathProgramCache]: Analyzing trace with hash 1664572736, now seen corresponding path program 1 times [2021-01-06 10:24:10,030 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:24:10,031 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181585371] [2021-01-06 10:24:10,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:24:10,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:24:10,064 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-01-06 10:24:10,065 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181585371] [2021-01-06 10:24:10,065 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 10:24:10,065 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 10:24:10,066 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558497753] [2021-01-06 10:24:10,066 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 10:24:10,066 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:24:10,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 10:24:10,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 10:24:10,067 INFO L87 Difference]: Start difference. First operand 57 states and 68 transitions. Second operand 3 states. [2021-01-06 10:24:10,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:24:10,116 INFO L93 Difference]: Finished difference Result 80 states and 93 transitions. [2021-01-06 10:24:10,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 10:24:10,117 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2021-01-06 10:24:10,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:24:10,118 INFO L225 Difference]: With dead ends: 80 [2021-01-06 10:24:10,118 INFO L226 Difference]: Without dead ends: 63 [2021-01-06 10:24:10,119 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 [2021-01-06 10:24:10,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-01-06 10:24:10,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 52. [2021-01-06 10:24:10,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2021-01-06 10:24:10,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 60 transitions. [2021-01-06 10:24:10,143 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 60 transitions. Word has length 27 [2021-01-06 10:24:10,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:24:10,144 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 60 transitions. [2021-01-06 10:24:10,144 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 10:24:10,144 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 60 transitions. [2021-01-06 10:24:10,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-01-06 10:24:10,152 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:24:10,153 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:24:10,153 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-01-06 10:24:10,153 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:24:10,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:24:10,154 INFO L82 PathProgramCache]: Analyzing trace with hash -147377384, now seen corresponding path program 2 times [2021-01-06 10:24:10,154 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:24:10,156 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158740883] [2021-01-06 10:24:10,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:24:10,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:24:10,525 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:24:10,525 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158740883] [2021-01-06 10:24:10,526 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1002111775] [2021-01-06 10:24:10,526 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:24:10,593 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 10:24:10,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:24:10,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 9 conjunts are in the unsatisfiable core [2021-01-06 10:24:10,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:24:10,851 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 14 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:24:10,851 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:24:10,851 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-01-06 10:24:10,852 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887600317] [2021-01-06 10:24:10,852 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-06 10:24:10,852 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:24:10,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-06 10:24:10,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2021-01-06 10:24:10,853 INFO L87 Difference]: Start difference. First operand 52 states and 60 transitions. Second operand 17 states. [2021-01-06 10:24:11,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:24:11,111 INFO L93 Difference]: Finished difference Result 108 states and 122 transitions. [2021-01-06 10:24:11,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 10:24:11,112 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 29 [2021-01-06 10:24:11,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:24:11,113 INFO L225 Difference]: With dead ends: 108 [2021-01-06 10:24:11,113 INFO L226 Difference]: Without dead ends: 72 [2021-01-06 10:24:11,114 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=127, Invalid=293, Unknown=0, NotChecked=0, Total=420 [2021-01-06 10:24:11,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-01-06 10:24:11,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 59. [2021-01-06 10:24:11,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2021-01-06 10:24:11,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 67 transitions. [2021-01-06 10:24:11,123 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 67 transitions. Word has length 29 [2021-01-06 10:24:11,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:24:11,123 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 67 transitions. [2021-01-06 10:24:11,123 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-01-06 10:24:11,123 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 67 transitions. [2021-01-06 10:24:11,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-01-06 10:24:11,124 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:24:11,124 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:24:11,338 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-01-06 10:24:11,338 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:24:11,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:24:11,340 INFO L82 PathProgramCache]: Analyzing trace with hash 1385615761, now seen corresponding path program 3 times [2021-01-06 10:24:11,340 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:24:11,340 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388188569] [2021-01-06 10:24:11,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:24:11,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:24:11,609 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:24:11,610 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388188569] [2021-01-06 10:24:11,610 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1880351908] [2021-01-06 10:24:11,610 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:24:11,673 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-01-06 10:24:11,673 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:24:11,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 18 conjunts are in the unsatisfiable core [2021-01-06 10:24:11,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:24:11,764 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 16 treesize of output 12 [2021-01-06 10:24:11,768 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:24:11,777 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:24:11,779 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:24:11,779 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:19 [2021-01-06 10:24:11,828 INFO L348 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-01-06 10:24:11,831 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 23 treesize of output 22 [2021-01-06 10:24:11,835 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:24:11,844 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:24:11,846 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:24:11,846 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:28 [2021-01-06 10:24:12,012 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:24:12,016 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:24:12,018 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 10:24:12,032 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:24:12,033 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:24:12,033 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 21 [2021-01-06 10:24:12,034 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784734054] [2021-01-06 10:24:12,034 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-06 10:24:12,034 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:24:12,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-06 10:24:12,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2021-01-06 10:24:12,035 INFO L87 Difference]: Start difference. First operand 59 states and 67 transitions. Second operand 21 states. [2021-01-06 10:24:12,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:24:12,953 INFO L93 Difference]: Finished difference Result 105 states and 116 transitions. [2021-01-06 10:24:12,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-01-06 10:24:12,953 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 33 [2021-01-06 10:24:12,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:24:12,955 INFO L225 Difference]: With dead ends: 105 [2021-01-06 10:24:12,955 INFO L226 Difference]: Without dead ends: 95 [2021-01-06 10:24:12,956 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=214, Invalid=976, Unknown=0, NotChecked=0, Total=1190 [2021-01-06 10:24:12,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-01-06 10:24:12,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 65. [2021-01-06 10:24:12,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2021-01-06 10:24:12,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 73 transitions. [2021-01-06 10:24:12,965 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 73 transitions. Word has length 33 [2021-01-06 10:24:12,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:24:12,966 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 73 transitions. [2021-01-06 10:24:12,966 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2021-01-06 10:24:12,966 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 73 transitions. [2021-01-06 10:24:12,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-01-06 10:24:12,967 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:24:12,967 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:24:13,182 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:24:13,183 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:24:13,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:24:13,184 INFO L82 PathProgramCache]: Analyzing trace with hash 1948866197, now seen corresponding path program 2 times [2021-01-06 10:24:13,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:24:13,185 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280314920] [2021-01-06 10:24:13,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:24:13,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:24:13,334 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:24:13,335 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280314920] [2021-01-06 10:24:13,335 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [649054400] [2021-01-06 10:24:13,335 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:24:13,402 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 10:24:13,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:24:13,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 16 conjunts are in the unsatisfiable core [2021-01-06 10:24:13,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:24:13,457 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 16 treesize of output 12 [2021-01-06 10:24:13,459 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:24:13,467 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:24:13,470 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:24:13,471 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:19 [2021-01-06 10:24:13,496 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 0 case distinctions, treesize of input 37 treesize of output 32 [2021-01-06 10:24:13,514 INFO L348 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-01-06 10:24:13,514 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 57 treesize of output 61 [2021-01-06 10:24:13,519 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-01-06 10:24:13,527 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:24:13,528 INFO L547 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:24:13,538 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:24:13,547 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-01-06 10:24:13,547 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:43, output treesize:31 [2021-01-06 10:24:13,831 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:24:13,836 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:24:13,840 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:24:13,843 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2021-01-06 10:24:13,861 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:24:13,862 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:24:13,862 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-01-06 10:24:13,862 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013060785] [2021-01-06 10:24:13,863 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-01-06 10:24:13,863 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:24:13,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-01-06 10:24:13,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-01-06 10:24:13,865 INFO L87 Difference]: Start difference. First operand 65 states and 73 transitions. Second operand 15 states. [2021-01-06 10:24:14,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:24:14,696 INFO L93 Difference]: Finished difference Result 137 states and 151 transitions. [2021-01-06 10:24:14,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-01-06 10:24:14,697 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 33 [2021-01-06 10:24:14,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:24:14,698 INFO L225 Difference]: With dead ends: 137 [2021-01-06 10:24:14,698 INFO L226 Difference]: Without dead ends: 127 [2021-01-06 10:24:14,699 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=152, Invalid=660, Unknown=0, NotChecked=0, Total=812 [2021-01-06 10:24:14,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-01-06 10:24:14,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 71. [2021-01-06 10:24:14,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2021-01-06 10:24:14,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 80 transitions. [2021-01-06 10:24:14,709 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 80 transitions. Word has length 33 [2021-01-06 10:24:14,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:24:14,710 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 80 transitions. [2021-01-06 10:24:14,710 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2021-01-06 10:24:14,710 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 80 transitions. [2021-01-06 10:24:14,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-01-06 10:24:14,711 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:24:14,711 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:24:14,924 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-01-06 10:24:14,925 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:24:14,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:24:14,927 INFO L82 PathProgramCache]: Analyzing trace with hash -2065206767, now seen corresponding path program 1 times [2021-01-06 10:24:14,927 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:24:14,927 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649859842] [2021-01-06 10:24:14,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:24:14,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:24:15,073 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:24:15,073 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649859842] [2021-01-06 10:24:15,073 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1545834817] [2021-01-06 10:24:15,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:24:15,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:24:15,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 20 conjunts are in the unsatisfiable core [2021-01-06 10:24:15,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:24:15,158 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 16 treesize of output 12 [2021-01-06 10:24:15,160 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:24:15,170 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:24:15,171 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:24:15,171 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:19 [2021-01-06 10:24:15,197 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 0 case distinctions, treesize of input 37 treesize of output 32 [2021-01-06 10:24:15,213 INFO L348 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-01-06 10:24:15,214 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 53 treesize of output 57 [2021-01-06 10:24:15,223 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-01-06 10:24:15,227 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:24:15,228 INFO L547 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:24:15,237 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:24:15,241 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-01-06 10:24:15,242 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:43, output treesize:31 [2021-01-06 10:24:15,542 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 10:24:15,545 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2021-01-06 10:24:15,578 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:24:15,578 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:24:15,578 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-01-06 10:24:15,579 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134457619] [2021-01-06 10:24:15,579 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-06 10:24:15,580 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:24:15,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-06 10:24:15,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-01-06 10:24:15,581 INFO L87 Difference]: Start difference. First operand 71 states and 80 transitions. Second operand 16 states. [2021-01-06 10:24:16,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:24:16,687 INFO L93 Difference]: Finished difference Result 154 states and 173 transitions. [2021-01-06 10:24:16,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-01-06 10:24:16,688 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 33 [2021-01-06 10:24:16,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:24:16,689 INFO L225 Difference]: With dead ends: 154 [2021-01-06 10:24:16,689 INFO L226 Difference]: Without dead ends: 152 [2021-01-06 10:24:16,708 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 370 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=300, Invalid=1182, Unknown=0, NotChecked=0, Total=1482 [2021-01-06 10:24:16,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-01-06 10:24:16,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 83. [2021-01-06 10:24:16,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2021-01-06 10:24:16,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 94 transitions. [2021-01-06 10:24:16,726 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 94 transitions. Word has length 33 [2021-01-06 10:24:16,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:24:16,726 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 94 transitions. [2021-01-06 10:24:16,726 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2021-01-06 10:24:16,727 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 94 transitions. [2021-01-06 10:24:16,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-01-06 10:24:16,728 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:24:16,728 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:24:16,944 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-01-06 10:24:16,945 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:24:16,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:24:16,946 INFO L82 PathProgramCache]: Analyzing trace with hash 382246692, now seen corresponding path program 4 times [2021-01-06 10:24:16,946 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:24:16,946 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792875879] [2021-01-06 10:24:16,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:24:16,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:24:17,304 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:24:17,305 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792875879] [2021-01-06 10:24:17,305 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [998012215] [2021-01-06 10:24:17,305 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:24:17,367 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 10:24:17,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:24:17,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 17 conjunts are in the unsatisfiable core [2021-01-06 10:24:17,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:24:17,456 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-01-06 10:24:17,459 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:24:17,465 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:24:17,468 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:24:17,469 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:17, output treesize:9 [2021-01-06 10:24:17,642 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:24:17,646 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:24:17,681 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:24:17,682 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:24:17,682 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2021-01-06 10:24:17,682 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521849831] [2021-01-06 10:24:17,683 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-06 10:24:17,684 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:24:17,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-06 10:24:17,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2021-01-06 10:24:17,685 INFO L87 Difference]: Start difference. First operand 83 states and 94 transitions. Second operand 21 states. [2021-01-06 10:24:18,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:24:18,931 INFO L93 Difference]: Finished difference Result 143 states and 158 transitions. [2021-01-06 10:24:18,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-01-06 10:24:18,932 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 39 [2021-01-06 10:24:18,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:24:18,934 INFO L225 Difference]: With dead ends: 143 [2021-01-06 10:24:18,935 INFO L226 Difference]: Without dead ends: 133 [2021-01-06 10:24:18,936 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=183, Invalid=809, Unknown=0, NotChecked=0, Total=992 [2021-01-06 10:24:18,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-01-06 10:24:18,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 89. [2021-01-06 10:24:18,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2021-01-06 10:24:18,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 100 transitions. [2021-01-06 10:24:18,953 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 100 transitions. Word has length 39 [2021-01-06 10:24:18,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:24:18,954 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 100 transitions. [2021-01-06 10:24:18,954 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2021-01-06 10:24:18,954 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 100 transitions. [2021-01-06 10:24:18,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-01-06 10:24:18,955 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:24:18,955 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:24:19,170 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-01-06 10:24:19,171 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:24:19,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:24:19,173 INFO L82 PathProgramCache]: Analyzing trace with hash -1287892696, now seen corresponding path program 3 times [2021-01-06 10:24:19,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:24:19,174 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210512679] [2021-01-06 10:24:19,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:24:19,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:24:19,531 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:24:19,532 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210512679] [2021-01-06 10:24:19,532 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1118332317] [2021-01-06 10:24:19,533 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 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:24:19,661 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-01-06 10:24:19,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:24:19,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 24 conjunts are in the unsatisfiable core [2021-01-06 10:24:19,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:24:19,727 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-01-06 10:24:19,728 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:24:19,730 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:24:19,731 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:24:19,732 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:9 [2021-01-06 10:24:19,918 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:24:19,919 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:24:19,919 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 20 [2021-01-06 10:24:19,919 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333833114] [2021-01-06 10:24:19,920 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-01-06 10:24:19,920 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:24:19,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-01-06 10:24:19,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2021-01-06 10:24:19,921 INFO L87 Difference]: Start difference. First operand 89 states and 100 transitions. Second operand 20 states. [2021-01-06 10:24:21,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:24:21,115 INFO L93 Difference]: Finished difference Result 180 states and 200 transitions. [2021-01-06 10:24:21,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-01-06 10:24:21,116 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 39 [2021-01-06 10:24:21,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:24:21,118 INFO L225 Difference]: With dead ends: 180 [2021-01-06 10:24:21,118 INFO L226 Difference]: Without dead ends: 178 [2021-01-06 10:24:21,120 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 527 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=399, Invalid=1581, Unknown=0, NotChecked=0, Total=1980 [2021-01-06 10:24:21,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2021-01-06 10:24:21,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 95. [2021-01-06 10:24:21,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2021-01-06 10:24:21,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 106 transitions. [2021-01-06 10:24:21,137 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 106 transitions. Word has length 39 [2021-01-06 10:24:21,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:24:21,137 INFO L481 AbstractCegarLoop]: Abstraction has 95 states and 106 transitions. [2021-01-06 10:24:21,137 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2021-01-06 10:24:21,137 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 106 transitions. [2021-01-06 10:24:21,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-01-06 10:24:21,138 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:24:21,138 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:24:21,352 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-01-06 10:24:21,353 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:24:21,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:24:21,354 INFO L82 PathProgramCache]: Analyzing trace with hash -270486921, now seen corresponding path program 5 times [2021-01-06 10:24:21,355 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:24:21,355 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599601756] [2021-01-06 10:24:21,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:24:21,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:24:21,931 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 33 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:24:21,931 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599601756] [2021-01-06 10:24:21,932 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1077967855] [2021-01-06 10:24:21,932 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:24:22,022 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-01-06 10:24:22,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:24:22,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-06 10:24:22,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:24:22,631 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 52 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:24:22,632 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:24:22,633 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-01-06 10:24:22,633 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927719231] [2021-01-06 10:24:22,634 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-01-06 10:24:22,634 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:24:22,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-01-06 10:24:22,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=374, Unknown=0, NotChecked=0, Total=506 [2021-01-06 10:24:22,635 INFO L87 Difference]: Start difference. First operand 95 states and 106 transitions. Second operand 23 states. [2021-01-06 10:24:23,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:24:23,232 INFO L93 Difference]: Finished difference Result 188 states and 208 transitions. [2021-01-06 10:24:23,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-01-06 10:24:23,234 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 45 [2021-01-06 10:24:23,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:24:23,235 INFO L225 Difference]: With dead ends: 188 [2021-01-06 10:24:23,236 INFO L226 Difference]: Without dead ends: 116 [2021-01-06 10:24:23,237 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=222, Invalid=590, Unknown=0, NotChecked=0, Total=812 [2021-01-06 10:24:23,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-01-06 10:24:23,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 107. [2021-01-06 10:24:23,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2021-01-06 10:24:23,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 118 transitions. [2021-01-06 10:24:23,256 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 118 transitions. Word has length 45 [2021-01-06 10:24:23,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:24:23,256 INFO L481 AbstractCegarLoop]: Abstraction has 107 states and 118 transitions. [2021-01-06 10:24:23,256 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2021-01-06 10:24:23,256 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 118 transitions. [2021-01-06 10:24:23,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-01-06 10:24:23,257 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:24:23,258 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:24:23,472 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-01-06 10:24:23,473 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:24:23,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:24:23,474 INFO L82 PathProgramCache]: Analyzing trace with hash -1534181648, now seen corresponding path program 6 times [2021-01-06 10:24:23,475 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:24:23,475 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631600667] [2021-01-06 10:24:23,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:24:23,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:24:23,897 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 8 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:24:23,898 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631600667] [2021-01-06 10:24:23,898 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1528882350] [2021-01-06 10:24:23,898 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:24:24,023 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-01-06 10:24:24,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:24:24,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 27 conjunts are in the unsatisfiable core [2021-01-06 10:24:24,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:24:24,147 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 16 treesize of output 12 [2021-01-06 10:24:24,149 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:24:24,159 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:24:24,161 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:24:24,162 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:19 [2021-01-06 10:24:24,231 INFO L348 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-01-06 10:24:24,232 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 23 treesize of output 22 [2021-01-06 10:24:24,235 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:24:24,243 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:24:24,245 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:24:24,245 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:22 [2021-01-06 10:24:24,639 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:24:24,641 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:24:24,731 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 8 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:24:24,732 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:24:24,732 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 26 [2021-01-06 10:24:24,732 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69488415] [2021-01-06 10:24:24,732 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-01-06 10:24:24,733 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:24:24,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-01-06 10:24:24,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=574, Unknown=0, NotChecked=0, Total=650 [2021-01-06 10:24:24,735 INFO L87 Difference]: Start difference. First operand 107 states and 118 transitions. Second operand 26 states. [2021-01-06 10:24:27,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:24:27,064 INFO L93 Difference]: Finished difference Result 171 states and 187 transitions. [2021-01-06 10:24:27,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-01-06 10:24:27,065 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 49 [2021-01-06 10:24:27,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:24:27,066 INFO L225 Difference]: With dead ends: 171 [2021-01-06 10:24:27,066 INFO L226 Difference]: Without dead ends: 161 [2021-01-06 10:24:27,068 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 410 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=280, Invalid=1882, Unknown=0, NotChecked=0, Total=2162 [2021-01-06 10:24:27,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-01-06 10:24:27,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 113. [2021-01-06 10:24:27,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2021-01-06 10:24:27,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 124 transitions. [2021-01-06 10:24:27,086 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 124 transitions. Word has length 49 [2021-01-06 10:24:27,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:24:27,086 INFO L481 AbstractCegarLoop]: Abstraction has 113 states and 124 transitions. [2021-01-06 10:24:27,086 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2021-01-06 10:24:27,087 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 124 transitions. [2021-01-06 10:24:27,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-01-06 10:24:27,087 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:24:27,088 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:24:27,302 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:24:27,303 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:24:27,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:24:27,304 INFO L82 PathProgramCache]: Analyzing trace with hash -523389962, now seen corresponding path program 4 times [2021-01-06 10:24:27,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:24:27,305 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142854837] [2021-01-06 10:24:27,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:24:27,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:24:27,682 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 8 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:24:27,683 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142854837] [2021-01-06 10:24:27,683 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [54764363] [2021-01-06 10:24:27,683 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 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:24:27,757 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 10:24:27,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:24:27,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 22 conjunts are in the unsatisfiable core [2021-01-06 10:24:27,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:24:27,806 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 16 treesize of output 12 [2021-01-06 10:24:27,807 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:24:27,819 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:24:27,821 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:24:27,822 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:19 [2021-01-06 10:24:27,853 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 0 case distinctions, treesize of input 37 treesize of output 32 [2021-01-06 10:24:27,868 INFO L348 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-01-06 10:24:27,869 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 57 treesize of output 61 [2021-01-06 10:24:27,871 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-01-06 10:24:27,877 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:24:27,878 INFO L547 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:24:27,887 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:24:27,889 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-01-06 10:24:27,889 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:43, output treesize:31 [2021-01-06 10:24:28,470 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:24:28,475 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:24:28,485 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:24:28,488 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2021-01-06 10:24:28,531 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 8 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:24:28,531 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:24:28,532 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 20 [2021-01-06 10:24:28,532 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039164263] [2021-01-06 10:24:28,536 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-01-06 10:24:28,536 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:24:28,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-01-06 10:24:28,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2021-01-06 10:24:28,541 INFO L87 Difference]: Start difference. First operand 113 states and 124 transitions. Second operand 20 states. [2021-01-06 10:24:30,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:24:30,990 INFO L93 Difference]: Finished difference Result 208 states and 228 transitions. [2021-01-06 10:24:30,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-01-06 10:24:30,991 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 49 [2021-01-06 10:24:30,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:24:30,994 INFO L225 Difference]: With dead ends: 208 [2021-01-06 10:24:30,995 INFO L226 Difference]: Without dead ends: 198 [2021-01-06 10:24:31,000 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 559 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=270, Invalid=1892, Unknown=0, NotChecked=0, Total=2162 [2021-01-06 10:24:31,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2021-01-06 10:24:31,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 119. [2021-01-06 10:24:31,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2021-01-06 10:24:31,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 131 transitions. [2021-01-06 10:24:31,026 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 131 transitions. Word has length 49 [2021-01-06 10:24:31,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:24:31,026 INFO L481 AbstractCegarLoop]: Abstraction has 119 states and 131 transitions. [2021-01-06 10:24:31,026 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2021-01-06 10:24:31,027 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 131 transitions. [2021-01-06 10:24:31,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-01-06 10:24:31,028 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:24:31,028 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:24:31,241 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19 [2021-01-06 10:24:31,242 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:24:31,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:24:31,244 INFO L82 PathProgramCache]: Analyzing trace with hash 746381232, now seen corresponding path program 2 times [2021-01-06 10:24:31,244 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:24:31,244 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120517359] [2021-01-06 10:24:31,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:24:31,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:24:31,522 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:24:31,522 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120517359] [2021-01-06 10:24:31,522 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [976320972] [2021-01-06 10:24:31,523 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 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:24:31,594 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 10:24:31,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:24:31,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 35 conjunts are in the unsatisfiable core [2021-01-06 10:24:31,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:24:31,630 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 16 treesize of output 12 [2021-01-06 10:24:31,631 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:24:31,640 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:24:31,641 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:24:31,641 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:19 [2021-01-06 10:24:31,670 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 0 case distinctions, treesize of input 37 treesize of output 32 [2021-01-06 10:24:31,687 INFO L348 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-01-06 10:24:31,688 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 53 treesize of output 57 [2021-01-06 10:24:31,693 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-01-06 10:24:31,699 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:24:31,700 INFO L547 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:24:31,709 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:24:31,711 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-01-06 10:24:31,712 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:43, output treesize:31 [2021-01-06 10:24:32,235 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 10:24:32,238 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2021-01-06 10:24:32,287 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:24:32,288 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:24:32,288 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 23 [2021-01-06 10:24:32,288 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266997196] [2021-01-06 10:24:32,289 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-01-06 10:24:32,289 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:24:32,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-01-06 10:24:32,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2021-01-06 10:24:32,290 INFO L87 Difference]: Start difference. First operand 119 states and 131 transitions. Second operand 23 states. [2021-01-06 10:24:34,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:24:34,435 INFO L93 Difference]: Finished difference Result 240 states and 267 transitions. [2021-01-06 10:24:34,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-01-06 10:24:34,436 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 49 [2021-01-06 10:24:34,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:24:34,438 INFO L225 Difference]: With dead ends: 240 [2021-01-06 10:24:34,438 INFO L226 Difference]: Without dead ends: 238 [2021-01-06 10:24:34,440 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 39 SyntacticMatches, 3 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1114 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=514, Invalid=3268, Unknown=0, NotChecked=0, Total=3782 [2021-01-06 10:24:34,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2021-01-06 10:24:34,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 131. [2021-01-06 10:24:34,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2021-01-06 10:24:34,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 145 transitions. [2021-01-06 10:24:34,459 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 145 transitions. Word has length 49 [2021-01-06 10:24:34,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:24:34,459 INFO L481 AbstractCegarLoop]: Abstraction has 131 states and 145 transitions. [2021-01-06 10:24:34,459 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2021-01-06 10:24:34,460 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 145 transitions. [2021-01-06 10:24:34,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-01-06 10:24:34,460 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:24:34,461 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:24:34,666 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:24:34,667 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:24:34,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:24:34,668 INFO L82 PathProgramCache]: Analyzing trace with hash 2083146051, now seen corresponding path program 7 times [2021-01-06 10:24:34,668 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:24:34,668 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018092189] [2021-01-06 10:24:34,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:24:34,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:24:34,990 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 10 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:24:34,991 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018092189] [2021-01-06 10:24:34,991 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1699657588] [2021-01-06 10:24:34,991 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:24:35,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:24:35,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 23 conjunts are in the unsatisfiable core [2021-01-06 10:24:35,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:24:35,186 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-01-06 10:24:35,188 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:24:35,195 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:24:35,197 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:24:35,197 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:17, output treesize:9 [2021-01-06 10:24:35,511 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:24:35,519 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:24:35,538 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 10 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:24:35,539 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:24:35,539 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 27 [2021-01-06 10:24:35,539 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943650514] [2021-01-06 10:24:35,540 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-01-06 10:24:35,540 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:24:35,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-01-06 10:24:35,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=625, Unknown=0, NotChecked=0, Total=702 [2021-01-06 10:24:35,542 INFO L87 Difference]: Start difference. First operand 131 states and 145 transitions. Second operand 27 states. [2021-01-06 10:24:37,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:24:37,499 INFO L93 Difference]: Finished difference Result 208 states and 228 transitions. [2021-01-06 10:24:37,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-01-06 10:24:37,503 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 55 [2021-01-06 10:24:37,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:24:37,504 INFO L225 Difference]: With dead ends: 208 [2021-01-06 10:24:37,504 INFO L226 Difference]: Without dead ends: 198 [2021-01-06 10:24:37,506 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 508 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=307, Invalid=2143, Unknown=0, NotChecked=0, Total=2450 [2021-01-06 10:24:37,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2021-01-06 10:24:37,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 137. [2021-01-06 10:24:37,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2021-01-06 10:24:37,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 151 transitions. [2021-01-06 10:24:37,525 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 151 transitions. Word has length 55 [2021-01-06 10:24:37,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:24:37,525 INFO L481 AbstractCegarLoop]: Abstraction has 137 states and 151 transitions. [2021-01-06 10:24:37,525 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2021-01-06 10:24:37,525 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 151 transitions. [2021-01-06 10:24:37,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-01-06 10:24:37,526 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:24:37,526 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:24:37,740 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-01-06 10:24:37,741 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:24:37,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:24:37,742 INFO L82 PathProgramCache]: Analyzing trace with hash -1012702775, now seen corresponding path program 5 times [2021-01-06 10:24:37,742 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:24:37,743 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640976576] [2021-01-06 10:24:37,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:24:37,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:24:37,986 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 95 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:24:37,987 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640976576] [2021-01-06 10:24:37,987 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [679977943] [2021-01-06 10:24:37,987 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 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:24:38,105 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-01-06 10:24:38,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:24:38,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 18 conjunts are in the unsatisfiable core [2021-01-06 10:24:38,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:24:38,164 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 16 treesize of output 12 [2021-01-06 10:24:38,165 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:24:38,175 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:24:38,176 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:24:38,176 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:19 [2021-01-06 10:24:38,271 INFO L348 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2021-01-06 10:24:38,271 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 26 treesize of output 25 [2021-01-06 10:24:38,273 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:24:38,284 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:24:38,285 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:24:38,285 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:28 [2021-01-06 10:24:38,384 INFO L348 Elim1Store]: treesize reduction 56, result has 49.1 percent of original size [2021-01-06 10:24:38,385 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 38 treesize of output 72 [2021-01-06 10:24:38,387 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:24:38,426 INFO L625 ElimStorePlain]: treesize reduction 22, result has 64.5 percent of original size [2021-01-06 10:24:38,427 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:24:38,428 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:44, output treesize:40 [2021-01-06 10:24:38,637 INFO L348 Elim1Store]: treesize reduction 162, result has 17.3 percent of original size [2021-01-06 10:24:38,645 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 47 treesize of output 52 [2021-01-06 10:24:38,647 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:24:38,664 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:24:38,666 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-01-06 10:24:38,667 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:58, output treesize:54 [2021-01-06 10:24:38,887 WARN L197 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 45 [2021-01-06 10:24:38,889 INFO L348 Elim1Store]: treesize reduction 166, result has 44.7 percent of original size [2021-01-06 10:24:38,889 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 59 treesize of output 155 [2021-01-06 10:24:38,895 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:24:38,960 INFO L625 ElimStorePlain]: treesize reduction 51, result has 56.4 percent of original size [2021-01-06 10:24:38,964 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-01-06 10:24:38,965 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:70, output treesize:66 [2021-01-06 10:24:40,650 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:24:40,653 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:24:40,660 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2021-01-06 10:24:40,669 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2021-01-06 10:24:40,675 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 7 disjuncts [2021-01-06 10:24:40,758 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 36 proven. 15 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-01-06 10:24:40,758 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:24:40,758 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 27 [2021-01-06 10:24:40,759 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296360442] [2021-01-06 10:24:40,759 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-01-06 10:24:40,759 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:24:40,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-01-06 10:24:40,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=631, Unknown=1, NotChecked=0, Total=702 [2021-01-06 10:24:40,760 INFO L87 Difference]: Start difference. First operand 137 states and 151 transitions. Second operand 27 states. [2021-01-06 10:25:05,608 WARN L197 SmtUtils]: Spent 2.03 s on a formula simplification that was a NOOP. DAG size: 51 [2021-01-06 10:25:15,847 WARN L197 SmtUtils]: Spent 2.02 s on a formula simplification that was a NOOP. DAG size: 45 [2021-01-06 10:25:18,803 WARN L197 SmtUtils]: Spent 2.87 s on a formula simplification. DAG size of input: 51 DAG size of output: 47 [2021-01-06 10:25:25,134 WARN L197 SmtUtils]: Spent 2.02 s on a formula simplification that was a NOOP. DAG size: 46 [2021-01-06 10:25:27,207 WARN L197 SmtUtils]: Spent 2.02 s on a formula simplification that was a NOOP. DAG size: 47 [2021-01-06 10:25:33,409 WARN L197 SmtUtils]: Spent 2.03 s on a formula simplification that was a NOOP. DAG size: 49 [2021-01-06 10:25:37,612 WARN L197 SmtUtils]: Spent 2.03 s on a formula simplification that was a NOOP. DAG size: 48 [2021-01-06 10:25:41,726 WARN L197 SmtUtils]: Spent 4.06 s on a formula simplification. DAG size of input: 53 DAG size of output: 48 [2021-01-06 10:25:47,957 WARN L197 SmtUtils]: Spent 4.07 s on a formula simplification. DAG size of input: 55 DAG size of output: 50 [2021-01-06 10:25:52,076 WARN L197 SmtUtils]: Spent 4.06 s on a formula simplification. DAG size of input: 54 DAG size of output: 49 [2021-01-06 10:25:58,304 WARN L197 SmtUtils]: Spent 4.05 s on a formula simplification. DAG size of input: 53 DAG size of output: 48 [2021-01-06 10:26:02,475 WARN L197 SmtUtils]: Spent 4.06 s on a formula simplification. DAG size of input: 54 DAG size of output: 49 [2021-01-06 10:26:06,764 WARN L197 SmtUtils]: Spent 4.06 s on a formula simplification. DAG size of input: 46 DAG size of output: 45 [2021-01-06 10:26:07,652 WARN L197 SmtUtils]: Spent 787.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 46 [2021-01-06 10:26:13,827 WARN L197 SmtUtils]: Spent 4.05 s on a formula simplification. DAG size of input: 43 DAG size of output: 42 [2021-01-06 10:26:15,979 WARN L197 SmtUtils]: Spent 2.03 s on a formula simplification that was a NOOP. DAG size: 51 [2021-01-06 10:26:18,144 WARN L197 SmtUtils]: Spent 2.04 s on a formula simplification that was a NOOP. DAG size: 52 [2021-01-06 10:26:20,382 WARN L197 SmtUtils]: Spent 2.03 s on a formula simplification that was a NOOP. DAG size: 51 [2021-01-06 10:26:22,509 WARN L197 SmtUtils]: Spent 2.03 s on a formula simplification that was a NOOP. DAG size: 53 [2021-01-06 10:26:24,604 WARN L197 SmtUtils]: Spent 2.03 s on a formula simplification that was a NOOP. DAG size: 52 [2021-01-06 10:26:26,802 WARN L197 SmtUtils]: Spent 2.03 s on a formula simplification that was a NOOP. DAG size: 47 [2021-01-06 10:26:28,931 WARN L197 SmtUtils]: Spent 2.02 s on a formula simplification that was a NOOP. DAG size: 48 [2021-01-06 10:26:39,064 WARN L197 SmtUtils]: Spent 2.02 s on a formula simplification that was a NOOP. DAG size: 44 [2021-01-06 10:26:39,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:26:39,126 INFO L93 Difference]: Finished difference Result 245 states and 268 transitions. [2021-01-06 10:26:39,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-01-06 10:26:39,127 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 55 [2021-01-06 10:26:39,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:26:39,128 INFO L225 Difference]: With dead ends: 245 [2021-01-06 10:26:39,128 INFO L226 Difference]: Without dead ends: 217 [2021-01-06 10:26:39,131 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 39 SyntacticMatches, 5 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2585 ImplicationChecksByTransitivity, 95.1s TimeCoverageRelationStatistics Valid=910, Invalid=7264, Unknown=16, NotChecked=0, Total=8190 [2021-01-06 10:26:39,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2021-01-06 10:26:39,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 149. [2021-01-06 10:26:39,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2021-01-06 10:26:39,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 162 transitions. [2021-01-06 10:26:39,148 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 162 transitions. Word has length 55 [2021-01-06 10:26:39,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:26:39,148 INFO L481 AbstractCegarLoop]: Abstraction has 149 states and 162 transitions. [2021-01-06 10:26:39,148 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2021-01-06 10:26:39,148 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 162 transitions. [2021-01-06 10:26:39,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-01-06 10:26:39,149 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:26:39,149 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:26:39,349 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:26:39,350 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:26:39,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:26:39,350 INFO L82 PathProgramCache]: Analyzing trace with hash 1404832086, now seen corresponding path program 8 times [2021-01-06 10:26:39,351 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:26:39,351 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637757285] [2021-01-06 10:26:39,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:26:39,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:26:40,044 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 83 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:26:40,045 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637757285] [2021-01-06 10:26:40,045 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [735704452] [2021-01-06 10:26:40,045 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 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:26:40,116 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 10:26:40,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:26:40,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 15 conjunts are in the unsatisfiable core [2021-01-06 10:26:40,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:26:40,725 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 114 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:26:40,725 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:26:40,726 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 29 [2021-01-06 10:26:40,726 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647864268] [2021-01-06 10:26:40,726 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-01-06 10:26:40,726 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:26:40,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-01-06 10:26:40,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=610, Unknown=0, NotChecked=0, Total=812 [2021-01-06 10:26:40,727 INFO L87 Difference]: Start difference. First operand 149 states and 162 transitions. Second operand 29 states. [2021-01-06 10:26:41,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:26:41,320 INFO L93 Difference]: Finished difference Result 284 states and 308 transitions. [2021-01-06 10:26:41,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-01-06 10:26:41,321 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 61 [2021-01-06 10:26:41,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:26:41,322 INFO L225 Difference]: With dead ends: 284 [2021-01-06 10:26:41,322 INFO L226 Difference]: Without dead ends: 170 [2021-01-06 10:26:41,323 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 278 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=321, Invalid=939, Unknown=0, NotChecked=0, Total=1260 [2021-01-06 10:26:41,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2021-01-06 10:26:41,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 161. [2021-01-06 10:26:41,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2021-01-06 10:26:41,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 174 transitions. [2021-01-06 10:26:41,344 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 174 transitions. Word has length 61 [2021-01-06 10:26:41,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:26:41,344 INFO L481 AbstractCegarLoop]: Abstraction has 161 states and 174 transitions. [2021-01-06 10:26:41,344 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2021-01-06 10:26:41,344 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 174 transitions. [2021-01-06 10:26:41,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-01-06 10:26:41,345 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:26:41,345 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:26:41,560 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-01-06 10:26:41,561 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:26:41,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:26:41,561 INFO L82 PathProgramCache]: Analyzing trace with hash 337347535, now seen corresponding path program 9 times [2021-01-06 10:26:41,562 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:26:41,562 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799527058] [2021-01-06 10:26:41,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:26:41,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:26:42,028 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 12 proven. 130 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:26:42,028 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799527058] [2021-01-06 10:26:42,029 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2051139641] [2021-01-06 10:26:42,029 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:26:42,292 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-01-06 10:26:42,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:26:42,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 33 conjunts are in the unsatisfiable core [2021-01-06 10:26:42,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:26:42,437 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 16 treesize of output 12 [2021-01-06 10:26:42,438 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:26:42,448 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:26:42,450 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:26:42,450 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:19 [2021-01-06 10:26:42,512 INFO L348 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-01-06 10:26:42,513 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 23 treesize of output 22 [2021-01-06 10:26:42,517 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:26:42,525 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:26:42,526 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:26:42,526 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:22 [2021-01-06 10:26:43,048 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:26:43,051 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:26:43,146 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 12 proven. 130 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:26:43,147 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:26:43,147 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 32 [2021-01-06 10:26:43,147 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862243264] [2021-01-06 10:26:43,147 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-01-06 10:26:43,148 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:26:43,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-01-06 10:26:43,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=897, Unknown=0, NotChecked=0, Total=992 [2021-01-06 10:26:43,149 INFO L87 Difference]: Start difference. First operand 161 states and 174 transitions. Second operand 32 states. [2021-01-06 10:26:46,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:26:46,460 INFO L93 Difference]: Finished difference Result 241 states and 261 transitions. [2021-01-06 10:26:46,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-01-06 10:26:46,461 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 65 [2021-01-06 10:26:46,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:26:46,462 INFO L225 Difference]: With dead ends: 241 [2021-01-06 10:26:46,462 INFO L226 Difference]: Without dead ends: 231 [2021-01-06 10:26:46,464 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 859 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=418, Invalid=3614, Unknown=0, NotChecked=0, Total=4032 [2021-01-06 10:26:46,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2021-01-06 10:26:46,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 167. [2021-01-06 10:26:46,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2021-01-06 10:26:46,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 180 transitions. [2021-01-06 10:26:46,488 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 180 transitions. Word has length 65 [2021-01-06 10:26:46,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:26:46,488 INFO L481 AbstractCegarLoop]: Abstraction has 167 states and 180 transitions. [2021-01-06 10:26:46,488 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2021-01-06 10:26:46,488 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 180 transitions. [2021-01-06 10:26:46,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-01-06 10:26:46,489 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:26:46,489 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:26:46,704 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-01-06 10:26:46,705 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:26:46,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:26:46,706 INFO L82 PathProgramCache]: Analyzing trace with hash 283122771, now seen corresponding path program 6 times [2021-01-06 10:26:46,706 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:26:46,706 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020914838] [2021-01-06 10:26:46,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:26:46,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:26:47,049 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 12 proven. 130 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:26:47,049 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020914838] [2021-01-06 10:26:47,050 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1761407534] [2021-01-06 10:26:47,050 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 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:26:47,221 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-01-06 10:26:47,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:26:47,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 26 conjunts are in the unsatisfiable core [2021-01-06 10:26:47,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:26:47,356 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 16 treesize of output 12 [2021-01-06 10:26:47,357 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:26:47,368 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:26:47,369 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:26:47,369 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:22 [2021-01-06 10:26:47,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:26:47,476 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2021-01-06 10:26:47,478 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:26:47,490 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:26:47,491 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:26:47,492 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:31 [2021-01-06 10:26:47,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:26:47,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:26:47,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:26:47,554 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:26:47,555 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 40 [2021-01-06 10:26:47,556 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:26:47,571 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:26:47,572 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:26:47,573 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:47, output treesize:43 [2021-01-06 10:26:47,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:26:47,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:26:47,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:26:47,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:26:47,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:26:47,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:26:47,747 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:26:47,747 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 47 treesize of output 52 [2021-01-06 10:26:47,749 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:26:47,770 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:26:47,771 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-01-06 10:26:47,772 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:61, output treesize:57 [2021-01-06 10:26:47,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:26:47,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:26:47,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:26:47,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:26:47,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:26:47,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:26:47,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:26:47,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:26:47,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:26:47,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:26:47,910 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:26:47,911 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 59 treesize of output 67 [2021-01-06 10:26:47,914 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:26:47,943 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:26:47,947 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-01-06 10:26:47,948 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:73, output treesize:69 [2021-01-06 10:26:48,729 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:26:48,732 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:26:48,735 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2021-01-06 10:26:48,739 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2021-01-06 10:26:48,741 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 7 disjuncts [2021-01-06 10:26:48,862 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 68 proven. 50 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-01-06 10:26:48,862 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:26:48,863 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2021-01-06 10:26:48,863 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252937152] [2021-01-06 10:26:48,863 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-01-06 10:26:48,864 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:26:48,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-01-06 10:26:48,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=907, Unknown=0, NotChecked=0, Total=992 [2021-01-06 10:26:48,865 INFO L87 Difference]: Start difference. First operand 167 states and 180 transitions. Second operand 32 states. [2021-01-06 10:26:51,256 WARN L197 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 49 [2021-01-06 10:26:54,046 WARN L197 SmtUtils]: Spent 2.09 s on a formula simplification. DAG size of input: 57 DAG size of output: 54 [2021-01-06 10:26:55,165 WARN L197 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 54 [2021-01-06 10:26:57,852 WARN L197 SmtUtils]: Spent 2.04 s on a formula simplification that was a NOOP. DAG size: 48 [2021-01-06 10:27:01,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:27:01,039 INFO L93 Difference]: Finished difference Result 274 states and 296 transitions. [2021-01-06 10:27:01,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-01-06 10:27:01,041 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 65 [2021-01-06 10:27:01,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:27:01,043 INFO L225 Difference]: With dead ends: 274 [2021-01-06 10:27:01,043 INFO L226 Difference]: Without dead ends: 252 [2021-01-06 10:27:01,047 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2453 ImplicationChecksByTransitivity, 10.2s TimeCoverageRelationStatistics Valid=738, Invalid=7818, Unknown=0, NotChecked=0, Total=8556 [2021-01-06 10:27:01,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2021-01-06 10:27:01,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 167. [2021-01-06 10:27:01,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2021-01-06 10:27:01,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 179 transitions. [2021-01-06 10:27:01,071 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 179 transitions. Word has length 65 [2021-01-06 10:27:01,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:27:01,072 INFO L481 AbstractCegarLoop]: Abstraction has 167 states and 179 transitions. [2021-01-06 10:27:01,072 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2021-01-06 10:27:01,072 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 179 transitions. [2021-01-06 10:27:01,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-01-06 10:27:01,073 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:27:01,073 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:27:01,280 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-01-06 10:27:01,281 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:27:01,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:27:01,282 INFO L82 PathProgramCache]: Analyzing trace with hash 1382106319, now seen corresponding path program 3 times [2021-01-06 10:27:01,282 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:27:01,282 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641890869] [2021-01-06 10:27:01,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:27:01,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:27:01,620 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:27:01,620 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641890869] [2021-01-06 10:27:01,621 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [708387928] [2021-01-06 10:27:01,621 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 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:27:01,749 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-01-06 10:27:01,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:27:01,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 22 conjunts are in the unsatisfiable core [2021-01-06 10:27:01,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:27:01,835 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 16 treesize of output 12 [2021-01-06 10:27:01,835 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:27:01,845 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:27:01,846 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:27:01,846 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:22 [2021-01-06 10:27:01,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:27:01,898 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-01-06 10:27:01,900 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:27:01,916 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:27:01,917 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:27:01,917 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:34 [2021-01-06 10:27:02,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:27:02,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:27:02,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:27:02,048 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:27:02,048 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 35 [2021-01-06 10:27:02,050 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:27:02,067 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:27:02,068 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:27:02,069 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:42, output treesize:38 [2021-01-06 10:27:02,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:27:02,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:27:02,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:27:02,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:27:02,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:27:02,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:27:02,154 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:27:02,155 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 45 treesize of output 50 [2021-01-06 10:27:02,157 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:27:02,179 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:27:02,180 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:27:02,180 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:54, output treesize:50 [2021-01-06 10:27:03,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:27:03,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:27:03,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:27:03,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:27:03,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:27:03,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:27:03,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:27:03,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:27:03,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:27:03,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:27:03,066 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:27:03,067 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 57 treesize of output 65 [2021-01-06 10:27:03,069 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:27:03,098 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:27:03,100 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-01-06 10:27:03,100 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:71, output treesize:67 [2021-01-06 10:27:03,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:27:03,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:27:03,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:27:03,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:27:03,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:27:03,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:27:03,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:27:03,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:27:03,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:27:03,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:27:03,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:27:03,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:27:03,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:27:03,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:27:03,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:27:03,244 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:27:03,244 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 69 treesize of output 80 [2021-01-06 10:27:03,246 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:27:03,277 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:27:03,279 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-01-06 10:27:03,280 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:83, output treesize:79 [2021-01-06 10:27:05,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:27:05,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:27:05,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:27:05,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:27:05,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:27:05,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:27:05,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:27:05,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:27:05,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:27:05,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:27:05,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:27:05,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:27:05,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:27:05,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:27:05,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:27:05,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:27:05,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:27:05,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:27:05,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:27:05,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:27:05,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:27:05,278 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:27:05,278 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 81 treesize of output 95 [2021-01-06 10:27:05,281 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:27:05,317 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:27:05,321 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-01-06 10:27:05,322 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:100, output treesize:96 [2021-01-06 10:27:05,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:27:05,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:27:05,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:27:05,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:27:05,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:27:05,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:27:05,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:27:05,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:27:05,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:27:05,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:27:05,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:27:05,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:27:05,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:27:05,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:27:05,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:27:05,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:27:05,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:27:05,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:27:05,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:27:05,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:27:05,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:27:05,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:27:05,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:27:05,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:27:05,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:27:05,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:27:05,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:27:05,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:27:05,525 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:27:05,530 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 28 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 93 treesize of output 110 [2021-01-06 10:27:05,533 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:27:05,577 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:27:05,582 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-01-06 10:27:05,582 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:112, output treesize:108 [2021-01-06 10:27:09,700 WARN L197 SmtUtils]: Spent 2.02 s on a formula simplification that was a NOOP. DAG size: 52 [2021-01-06 10:27:11,870 WARN L197 SmtUtils]: Spent 2.03 s on a formula simplification that was a NOOP. DAG size: 54 [2021-01-06 10:27:11,883 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:27:11,884 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:27:11,886 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 9 disjuncts [2021-01-06 10:27:11,899 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 9 disjuncts [2021-01-06 10:27:11,900 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 12 disjuncts [2021-01-06 10:27:12,005 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 20 proven. 20 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-01-06 10:27:12,006 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:27:12,006 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2021-01-06 10:27:12,006 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705452932] [2021-01-06 10:27:12,006 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-01-06 10:27:12,007 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:27:12,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-01-06 10:27:12,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=892, Unknown=1, NotChecked=0, Total=992 [2021-01-06 10:27:12,007 INFO L87 Difference]: Start difference. First operand 167 states and 179 transitions. Second operand 32 states. [2021-01-06 10:27:18,370 WARN L197 SmtUtils]: Spent 4.05 s on a formula simplification that was a NOOP. DAG size: 70 [2021-01-06 10:27:20,601 WARN L197 SmtUtils]: Spent 2.03 s on a formula simplification that was a NOOP. DAG size: 60 [2021-01-06 10:27:26,468 WARN L197 SmtUtils]: Spent 5.75 s on a formula simplification that was a NOOP. DAG size: 73 [2021-01-06 10:27:28,572 WARN L197 SmtUtils]: Spent 2.03 s on a formula simplification that was a NOOP. DAG size: 62 [2021-01-06 10:27:34,078 WARN L197 SmtUtils]: Spent 5.38 s on a formula simplification that was a NOOP. DAG size: 73 [2021-01-06 10:27:36,193 WARN L197 SmtUtils]: Spent 2.03 s on a formula simplification that was a NOOP. DAG size: 61 [2021-01-06 10:27:38,507 WARN L197 SmtUtils]: Spent 2.26 s on a formula simplification that was a NOOP. DAG size: 67 [2021-01-06 10:27:40,644 WARN L197 SmtUtils]: Spent 2.04 s on a formula simplification that was a NOOP. DAG size: 64 [2021-01-06 10:27:46,765 WARN L197 SmtUtils]: Spent 5.99 s on a formula simplification that was a NOOP. DAG size: 70 [2021-01-06 10:27:48,870 WARN L197 SmtUtils]: Spent 2.03 s on a formula simplification that was a NOOP. DAG size: 63 [2021-01-06 10:27:52,526 WARN L197 SmtUtils]: Spent 3.57 s on a formula simplification that was a NOOP. DAG size: 70 [2021-01-06 10:27:56,677 WARN L197 SmtUtils]: Spent 4.08 s on a formula simplification. DAG size of input: 67 DAG size of output: 60 [2021-01-06 10:27:58,784 WARN L197 SmtUtils]: Spent 2.05 s on a formula simplification that was a NOOP. DAG size: 64 [2021-01-06 10:28:02,953 WARN L197 SmtUtils]: Spent 4.10 s on a formula simplification. DAG size of input: 69 DAG size of output: 62 [2021-01-06 10:28:07,144 WARN L197 SmtUtils]: Spent 4.09 s on a formula simplification. DAG size of input: 68 DAG size of output: 61 [2021-01-06 10:28:11,286 WARN L197 SmtUtils]: Spent 4.05 s on a formula simplification that was a NOOP. DAG size: 67 [2021-01-06 10:28:15,539 WARN L197 SmtUtils]: Spent 4.12 s on a formula simplification. DAG size of input: 67 DAG size of output: 64 [2021-01-06 10:28:17,656 WARN L197 SmtUtils]: Spent 2.04 s on a formula simplification that was a NOOP. DAG size: 60