/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/skipped.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-dcfa08f [2020-12-23 00:37:34,829 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-23 00:37:34,839 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-23 00:37:34,884 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-23 00:37:34,885 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-23 00:37:34,887 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-23 00:37:34,907 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-23 00:37:34,912 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-23 00:37:34,918 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-23 00:37:34,925 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-23 00:37:34,930 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-23 00:37:34,933 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-23 00:37:34,934 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-23 00:37:34,938 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-23 00:37:34,941 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-23 00:37:34,943 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-23 00:37:34,945 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-23 00:37:34,947 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-23 00:37:34,955 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-23 00:37:34,961 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-23 00:37:34,966 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-23 00:37:34,968 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-23 00:37:34,971 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-23 00:37:34,974 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-23 00:37:34,985 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-23 00:37:35,009 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-23 00:37:35,011 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-23 00:37:35,012 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-23 00:37:35,013 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-23 00:37:35,078 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-23 00:37:35,079 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-23 00:37:35,085 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-23 00:37:35,086 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-23 00:37:35,086 INFO L138 SettingsManager]: * Use SBE=true [2020-12-23 00:37:35,086 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-23 00:37:35,086 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-23 00:37:35,087 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-23 00:37:35,087 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-23 00:37:35,087 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-23 00:37:35,088 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-23 00:37:35,089 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-23 00:37:35,090 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-23 00:37:35,090 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-23 00:37:35,090 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-23 00:37:35,091 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-23 00:37:35,091 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-23 00:37:35,091 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 00:37:35,091 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-23 00:37:35,091 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-23 00:37:35,092 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-23 00:37:35,092 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-23 00:37:35,092 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-23 00:37:35,092 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-23 00:37:35,092 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-23 00:37:35,093 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-23 00:37:35,597 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-23 00:37:35,638 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-23 00:37:35,644 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-23 00:37:35,646 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-23 00:37:35,647 INFO L275 PluginConnector]: CDTParser initialized [2020-12-23 00:37:35,650 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-tiling/skipped.c [2020-12-23 00:37:35,764 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/69982b61d/fe47b508c1704be1876ff59cbcfa8de7/FLAG681c968a4 [2020-12-23 00:37:36,697 INFO L306 CDTParser]: Found 1 translation units. [2020-12-23 00:37:36,698 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-tiling/skipped.c [2020-12-23 00:37:36,715 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/69982b61d/fe47b508c1704be1876ff59cbcfa8de7/FLAG681c968a4 [2020-12-23 00:37:36,969 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/69982b61d/fe47b508c1704be1876ff59cbcfa8de7 [2020-12-23 00:37:36,974 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-23 00:37:36,978 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-23 00:37:36,981 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-23 00:37:36,981 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-23 00:37:36,987 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-23 00:37:36,988 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 12:37:36" (1/1) ... [2020-12-23 00:37:36,990 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6657a7a1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:37:36, skipping insertion in model container [2020-12-23 00:37:36,990 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 12:37:36" (1/1) ... [2020-12-23 00:37:37,001 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-23 00:37:37,023 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-23 00:37:37,213 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/skipped.c[398,411] left hand side expression in assignment: lhs: VariableLHS[~SIZE~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~a~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~a~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~a~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~a~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[~a~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~a~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,] [2020-12-23 00:37:37,245 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 00:37:37,260 INFO L203 MainTranslator]: Completed pre-run [2020-12-23 00:37:37,278 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/skipped.c[398,411] left hand side expression in assignment: lhs: VariableLHS[~SIZE~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~a~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~a~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~a~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~a~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[~a~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~a~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,] [2020-12-23 00:37:37,292 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 00:37:37,318 INFO L208 MainTranslator]: Completed translation [2020-12-23 00:37:37,319 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:37:37 WrapperNode [2020-12-23 00:37:37,319 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-23 00:37:37,321 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-23 00:37:37,321 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-23 00:37:37,321 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-23 00:37:37,334 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:37:37" (1/1) ... [2020-12-23 00:37:37,348 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:37:37" (1/1) ... [2020-12-23 00:37:37,390 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-23 00:37:37,393 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-23 00:37:37,394 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-23 00:37:37,394 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-23 00:37:37,409 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:37:37" (1/1) ... [2020-12-23 00:37:37,409 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:37:37" (1/1) ... [2020-12-23 00:37:37,416 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:37:37" (1/1) ... [2020-12-23 00:37:37,417 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:37:37" (1/1) ... [2020-12-23 00:37:37,444 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:37:37" (1/1) ... [2020-12-23 00:37:37,460 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:37:37" (1/1) ... [2020-12-23 00:37:37,463 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:37:37" (1/1) ... [2020-12-23 00:37:37,473 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-23 00:37:37,475 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-23 00:37:37,478 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-23 00:37:37,478 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-23 00:37:37,479 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:37:37" (1/1) ... No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 00:37:37,649 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-23 00:37:37,651 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-23 00:37:37,651 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-23 00:37:37,651 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-12-23 00:37:37,651 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-23 00:37:37,652 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-23 00:37:37,652 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-23 00:37:38,273 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-23 00:37:38,273 INFO L299 CfgBuilder]: Removed 11 assume(true) statements. [2020-12-23 00:37:38,278 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 12:37:38 BoogieIcfgContainer [2020-12-23 00:37:38,278 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-23 00:37:38,285 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-23 00:37:38,286 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-23 00:37:38,319 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-23 00:37:38,320 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.12 12:37:36" (1/3) ... [2020-12-23 00:37:38,322 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@244b58f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 12:37:38, skipping insertion in model container [2020-12-23 00:37:38,322 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:37:37" (2/3) ... [2020-12-23 00:37:38,323 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@244b58f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 12:37:38, skipping insertion in model container [2020-12-23 00:37:38,323 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 12:37:38" (3/3) ... [2020-12-23 00:37:38,325 INFO L111 eAbstractionObserver]: Analyzing ICFG skipped.c [2020-12-23 00:37:38,334 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-23 00:37:38,341 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-23 00:37:38,384 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-23 00:37:38,422 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-23 00:37:38,422 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-23 00:37:38,422 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-23 00:37:38,422 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-23 00:37:38,423 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-23 00:37:38,423 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-23 00:37:38,423 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-23 00:37:38,423 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-23 00:37:38,445 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2020-12-23 00:37:38,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-23 00:37:38,453 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:37:38,454 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:37:38,455 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:37:38,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:37:38,465 INFO L82 PathProgramCache]: Analyzing trace with hash -1607783550, now seen corresponding path program 1 times [2020-12-23 00:37:38,479 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:37:38,480 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878833372] [2020-12-23 00:37:38,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:37:38,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:37:38,700 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:37:38,701 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878833372] [2020-12-23 00:37:38,702 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 00:37:38,703 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-23 00:37:38,704 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963836265] [2020-12-23 00:37:38,711 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-23 00:37:38,712 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:37:38,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-23 00:37:38,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-23 00:37:38,741 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 2 states. [2020-12-23 00:37:38,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:37:38,766 INFO L93 Difference]: Finished difference Result 43 states and 62 transitions. [2020-12-23 00:37:38,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-23 00:37:38,769 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 12 [2020-12-23 00:37:38,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:37:38,780 INFO L225 Difference]: With dead ends: 43 [2020-12-23 00:37:38,781 INFO L226 Difference]: Without dead ends: 20 [2020-12-23 00:37:38,785 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-23 00:37:38,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-12-23 00:37:38,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-12-23 00:37:38,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-12-23 00:37:38,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2020-12-23 00:37:38,831 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 12 [2020-12-23 00:37:38,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:37:38,831 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2020-12-23 00:37:38,832 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-23 00:37:38,832 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2020-12-23 00:37:38,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-23 00:37:38,833 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:37:38,833 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:37:38,834 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-23 00:37:38,834 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:37:38,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:37:38,836 INFO L82 PathProgramCache]: Analyzing trace with hash -1872951298, now seen corresponding path program 1 times [2020-12-23 00:37:38,836 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:37:38,836 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834920175] [2020-12-23 00:37:38,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:37:38,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:37:38,965 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:37:38,966 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834920175] [2020-12-23 00:37:38,967 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 00:37:38,967 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 00:37:38,969 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158201378] [2020-12-23 00:37:38,971 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 00:37:38,972 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:37:38,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 00:37:38,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 00:37:38,976 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand 3 states. [2020-12-23 00:37:39,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:37:39,151 INFO L93 Difference]: Finished difference Result 37 states and 45 transitions. [2020-12-23 00:37:39,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 00:37:39,153 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2020-12-23 00:37:39,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:37:39,156 INFO L225 Difference]: With dead ends: 37 [2020-12-23 00:37:39,156 INFO L226 Difference]: Without dead ends: 22 [2020-12-23 00:37:39,158 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 00:37:39,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-12-23 00:37:39,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2020-12-23 00:37:39,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-12-23 00:37:39,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2020-12-23 00:37:39,178 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 12 [2020-12-23 00:37:39,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:37:39,179 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2020-12-23 00:37:39,180 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 00:37:39,181 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2020-12-23 00:37:39,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 00:37:39,182 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:37:39,183 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:37:39,184 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-23 00:37:39,185 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:37:39,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:37:39,190 INFO L82 PathProgramCache]: Analyzing trace with hash -270152420, now seen corresponding path program 1 times [2020-12-23 00:37:39,190 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:37:39,191 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188844637] [2020-12-23 00:37:39,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:37:39,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:37:39,295 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:37:39,296 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188844637] [2020-12-23 00:37:39,296 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [687692274] [2020-12-23 00:37:39,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:37:39,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:37:39,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-23 00:37:39,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:37:39,765 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:37:39,767 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:37:39,767 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2020-12-23 00:37:39,769 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488733164] [2020-12-23 00:37:39,771 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 00:37:39,771 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:37:39,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 00:37:39,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-23 00:37:39,779 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 6 states. [2020-12-23 00:37:39,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:37:39,898 INFO L93 Difference]: Finished difference Result 39 states and 47 transitions. [2020-12-23 00:37:39,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 00:37:39,904 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 14 [2020-12-23 00:37:39,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:37:39,912 INFO L225 Difference]: With dead ends: 39 [2020-12-23 00:37:39,913 INFO L226 Difference]: Without dead ends: 24 [2020-12-23 00:37:39,914 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-23 00:37:39,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-12-23 00:37:39,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2020-12-23 00:37:39,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-12-23 00:37:39,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2020-12-23 00:37:39,924 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 14 [2020-12-23 00:37:39,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:37:39,926 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2020-12-23 00:37:39,926 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 00:37:39,927 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2020-12-23 00:37:39,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-23 00:37:39,930 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:37:39,930 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:37:40,146 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-12-23 00:37:40,148 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:37:40,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:37:40,150 INFO L82 PathProgramCache]: Analyzing trace with hash -1873689926, now seen corresponding path program 2 times [2020-12-23 00:37:40,150 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:37:40,151 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908344011] [2020-12-23 00:37:40,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:37:40,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:37:40,342 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-23 00:37:40,343 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908344011] [2020-12-23 00:37:40,344 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 00:37:40,344 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-23 00:37:40,344 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055948918] [2020-12-23 00:37:40,345 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 00:37:40,345 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:37:40,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 00:37:40,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-23 00:37:40,347 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand 5 states. [2020-12-23 00:37:40,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:37:40,439 INFO L93 Difference]: Finished difference Result 35 states and 42 transitions. [2020-12-23 00:37:40,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 00:37:40,440 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-12-23 00:37:40,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:37:40,441 INFO L225 Difference]: With dead ends: 35 [2020-12-23 00:37:40,441 INFO L226 Difference]: Without dead ends: 28 [2020-12-23 00:37:40,442 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 [2020-12-23 00:37:40,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-12-23 00:37:40,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 24. [2020-12-23 00:37:40,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-12-23 00:37:40,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2020-12-23 00:37:40,449 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 16 [2020-12-23 00:37:40,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:37:40,450 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2020-12-23 00:37:40,450 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 00:37:40,450 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2020-12-23 00:37:40,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-12-23 00:37:40,451 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:37:40,451 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:37:40,452 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-23 00:37:40,452 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:37:40,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:37:40,453 INFO L82 PathProgramCache]: Analyzing trace with hash -1095507628, now seen corresponding path program 1 times [2020-12-23 00:37:40,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:37:40,454 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661469001] [2020-12-23 00:37:40,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:37:40,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:37:40,753 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-23 00:37:40,753 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661469001] [2020-12-23 00:37:40,754 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1062116704] [2020-12-23 00:37:40,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:37:40,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:37:40,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-23 00:37:40,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:37:41,008 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2020-12-23 00:37:41,011 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:37:41,045 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:37:41,047 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:37:41,047 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:20 [2020-12-23 00:37:41,145 INFO L348 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2020-12-23 00:37:41,146 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 21 treesize of output 20 [2020-12-23 00:37:41,159 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:37:41,166 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:37:41,170 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:37:41,170 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:17 [2020-12-23 00:37:41,256 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 00:37:41,265 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 00:37:41,289 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-23 00:37:41,291 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:37:41,292 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2020-12-23 00:37:41,292 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084307181] [2020-12-23 00:37:41,294 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-23 00:37:41,295 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:37:41,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-23 00:37:41,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-12-23 00:37:41,299 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand 14 states. [2020-12-23 00:37:42,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:37:42,313 INFO L93 Difference]: Finished difference Result 78 states and 93 transitions. [2020-12-23 00:37:42,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-23 00:37:42,315 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 21 [2020-12-23 00:37:42,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:37:42,319 INFO L225 Difference]: With dead ends: 78 [2020-12-23 00:37:42,320 INFO L226 Difference]: Without dead ends: 76 [2020-12-23 00:37:42,322 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=242, Invalid=688, Unknown=0, NotChecked=0, Total=930 [2020-12-23 00:37:42,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-12-23 00:37:42,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 45. [2020-12-23 00:37:42,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-12-23 00:37:42,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 57 transitions. [2020-12-23 00:37:42,349 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 57 transitions. Word has length 21 [2020-12-23 00:37:42,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:37:42,350 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 57 transitions. [2020-12-23 00:37:42,350 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-23 00:37:42,350 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 57 transitions. [2020-12-23 00:37:42,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-12-23 00:37:42,352 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:37:42,352 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:37:42,566 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:37:42,567 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:37:42,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:37:42,568 INFO L82 PathProgramCache]: Analyzing trace with hash -415449258, now seen corresponding path program 1 times [2020-12-23 00:37:42,568 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:37:42,569 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013487932] [2020-12-23 00:37:42,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:37:42,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:37:42,748 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-23 00:37:42,748 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013487932] [2020-12-23 00:37:42,749 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [817182851] [2020-12-23 00:37:42,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:37:42,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:37:42,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-23 00:37:42,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:37:42,939 INFO L348 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2020-12-23 00:37:42,940 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 21 treesize of output 20 [2020-12-23 00:37:42,943 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:37:42,951 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:37:42,952 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:37:42,953 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:17 [2020-12-23 00:37:43,025 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 00:37:43,031 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 00:37:43,056 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-23 00:37:43,057 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:37:43,057 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2020-12-23 00:37:43,057 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844526296] [2020-12-23 00:37:43,058 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-23 00:37:43,058 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:37:43,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-23 00:37:43,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2020-12-23 00:37:43,060 INFO L87 Difference]: Start difference. First operand 45 states and 57 transitions. Second operand 16 states. [2020-12-23 00:37:43,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:37:43,916 INFO L93 Difference]: Finished difference Result 86 states and 104 transitions. [2020-12-23 00:37:43,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-23 00:37:43,917 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 21 [2020-12-23 00:37:43,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:37:43,919 INFO L225 Difference]: With dead ends: 86 [2020-12-23 00:37:43,919 INFO L226 Difference]: Without dead ends: 84 [2020-12-23 00:37:43,920 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=247, Invalid=809, Unknown=0, NotChecked=0, Total=1056 [2020-12-23 00:37:43,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-12-23 00:37:43,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 39. [2020-12-23 00:37:43,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-12-23 00:37:43,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 48 transitions. [2020-12-23 00:37:43,931 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 48 transitions. Word has length 21 [2020-12-23 00:37:43,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:37:43,931 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 48 transitions. [2020-12-23 00:37:43,931 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-23 00:37:43,932 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 48 transitions. [2020-12-23 00:37:43,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-12-23 00:37:43,933 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:37:43,933 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:37:44,147 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:37:44,148 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:37:44,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:37:44,150 INFO L82 PathProgramCache]: Analyzing trace with hash -952716724, now seen corresponding path program 1 times [2020-12-23 00:37:44,150 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:37:44,150 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891398449] [2020-12-23 00:37:44,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:37:44,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:37:44,375 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:37:44,376 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891398449] [2020-12-23 00:37:44,377 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [426741474] [2020-12-23 00:37:44,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:37:44,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:37:44,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 24 conjunts are in the unsatisfiable core [2020-12-23 00:37:44,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:37:44,783 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 00:37:44,794 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 00:37:44,819 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 00:37:44,821 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:37:44,821 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2020-12-23 00:37:44,824 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350965860] [2020-12-23 00:37:44,826 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-23 00:37:44,826 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:37:44,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-23 00:37:44,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2020-12-23 00:37:44,827 INFO L87 Difference]: Start difference. First operand 39 states and 48 transitions. Second operand 13 states. [2020-12-23 00:37:45,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:37:45,201 INFO L93 Difference]: Finished difference Result 53 states and 62 transitions. [2020-12-23 00:37:45,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-23 00:37:45,201 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 25 [2020-12-23 00:37:45,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:37:45,203 INFO L225 Difference]: With dead ends: 53 [2020-12-23 00:37:45,203 INFO L226 Difference]: Without dead ends: 51 [2020-12-23 00:37:45,204 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=114, Invalid=392, Unknown=0, NotChecked=0, Total=506 [2020-12-23 00:37:45,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-12-23 00:37:45,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 30. [2020-12-23 00:37:45,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-12-23 00:37:45,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2020-12-23 00:37:45,227 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 25 [2020-12-23 00:37:45,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:37:45,227 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2020-12-23 00:37:45,227 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-23 00:37:45,227 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2020-12-23 00:37:45,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-12-23 00:37:45,229 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:37:45,230 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:37:45,444 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:37:45,445 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:37:45,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:37:45,447 INFO L82 PathProgramCache]: Analyzing trace with hash 1643646272, now seen corresponding path program 1 times [2020-12-23 00:37:45,447 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:37:45,448 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063853035] [2020-12-23 00:37:45,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:37:45,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:37:45,584 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 00:37:45,585 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063853035] [2020-12-23 00:37:45,585 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1108756504] [2020-12-23 00:37:45,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:37:45,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:37:45,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-23 00:37:45,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:37:45,808 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 00:37:45,809 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:37:45,810 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2020-12-23 00:37:45,810 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677807675] [2020-12-23 00:37:45,811 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-23 00:37:45,811 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:37:45,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-23 00:37:45,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-12-23 00:37:45,812 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand 13 states. [2020-12-23 00:37:46,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:37:46,102 INFO L93 Difference]: Finished difference Result 88 states and 104 transitions. [2020-12-23 00:37:46,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-23 00:37:46,103 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 29 [2020-12-23 00:37:46,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:37:46,105 INFO L225 Difference]: With dead ends: 88 [2020-12-23 00:37:46,105 INFO L226 Difference]: Without dead ends: 51 [2020-12-23 00:37:46,106 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2020-12-23 00:37:46,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-12-23 00:37:46,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 32. [2020-12-23 00:37:46,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-12-23 00:37:46,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2020-12-23 00:37:46,114 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 29 [2020-12-23 00:37:46,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:37:46,115 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2020-12-23 00:37:46,115 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-23 00:37:46,115 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2020-12-23 00:37:46,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-12-23 00:37:46,116 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:37:46,116 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:37:46,332 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:37:46,333 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:37:46,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:37:46,334 INFO L82 PathProgramCache]: Analyzing trace with hash 1334470626, now seen corresponding path program 2 times [2020-12-23 00:37:46,335 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:37:46,336 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881625003] [2020-12-23 00:37:46,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:37:46,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:37:46,651 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-12-23 00:37:46,652 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881625003] [2020-12-23 00:37:46,652 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2110758151] [2020-12-23 00:37:46,652 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:37:46,731 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 00:37:46,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:37:46,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-23 00:37:46,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:37:46,941 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-12-23 00:37:46,942 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:37:46,942 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2020-12-23 00:37:46,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603521686] [2020-12-23 00:37:46,943 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-23 00:37:46,943 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:37:46,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-23 00:37:46,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2020-12-23 00:37:46,944 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand 15 states. [2020-12-23 00:37:47,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:37:47,365 INFO L93 Difference]: Finished difference Result 62 states and 71 transitions. [2020-12-23 00:37:47,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-23 00:37:47,365 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 31 [2020-12-23 00:37:47,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:37:47,366 INFO L225 Difference]: With dead ends: 62 [2020-12-23 00:37:47,366 INFO L226 Difference]: Without dead ends: 49 [2020-12-23 00:37:47,367 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=118, Invalid=302, Unknown=0, NotChecked=0, Total=420 [2020-12-23 00:37:47,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-12-23 00:37:47,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 37. [2020-12-23 00:37:47,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-12-23 00:37:47,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 43 transitions. [2020-12-23 00:37:47,375 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 43 transitions. Word has length 31 [2020-12-23 00:37:47,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:37:47,375 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 43 transitions. [2020-12-23 00:37:47,375 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-23 00:37:47,375 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 43 transitions. [2020-12-23 00:37:47,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-12-23 00:37:47,376 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:37:47,377 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:37:47,591 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:37:47,592 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:37:47,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:37:47,593 INFO L82 PathProgramCache]: Analyzing trace with hash 1713959812, now seen corresponding path program 3 times [2020-12-23 00:37:47,594 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:37:47,594 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580511990] [2020-12-23 00:37:47,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:37:47,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:37:47,965 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-12-23 00:37:47,966 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580511990] [2020-12-23 00:37:47,967 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2035483293] [2020-12-23 00:37:47,967 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:37:48,059 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-23 00:37:48,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:37:48,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 28 conjunts are in the unsatisfiable core [2020-12-23 00:37:48,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:37:48,112 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-23 00:37:48,187 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2020-12-23 00:37:48,189 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:37:48,195 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:37:48,196 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:37:48,197 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:20 [2020-12-23 00:37:48,247 INFO L348 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2020-12-23 00:37:48,248 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 [2020-12-23 00:37:48,251 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:37:48,256 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:37:48,257 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:37:48,258 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:19 [2020-12-23 00:37:48,430 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 00:37:48,434 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 00:37:48,467 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-23 00:37:48,468 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:37:48,468 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 20 [2020-12-23 00:37:48,469 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384227275] [2020-12-23 00:37:48,469 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-23 00:37:48,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:37:48,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-23 00:37:48,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2020-12-23 00:37:48,471 INFO L87 Difference]: Start difference. First operand 37 states and 43 transitions. Second operand 20 states. [2020-12-23 00:37:49,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:37:49,763 INFO L93 Difference]: Finished difference Result 131 states and 156 transitions. [2020-12-23 00:37:49,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-12-23 00:37:49,763 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 36 [2020-12-23 00:37:49,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:37:49,764 INFO L225 Difference]: With dead ends: 131 [2020-12-23 00:37:49,764 INFO L226 Difference]: Without dead ends: 104 [2020-12-23 00:37:49,767 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=277, Invalid=1205, Unknown=0, NotChecked=0, Total=1482 [2020-12-23 00:37:49,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-12-23 00:37:49,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 52. [2020-12-23 00:37:49,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-12-23 00:37:49,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 63 transitions. [2020-12-23 00:37:49,784 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 63 transitions. Word has length 36 [2020-12-23 00:37:49,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:37:49,785 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 63 transitions. [2020-12-23 00:37:49,785 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-23 00:37:49,785 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 63 transitions. [2020-12-23 00:37:49,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-12-23 00:37:49,786 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:37:49,787 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:37:50,000 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-12-23 00:37:50,001 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:37:50,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:37:50,002 INFO L82 PathProgramCache]: Analyzing trace with hash 173183780, now seen corresponding path program 1 times [2020-12-23 00:37:50,002 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:37:50,003 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592490228] [2020-12-23 00:37:50,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:37:50,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:37:51,254 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:37:51,254 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592490228] [2020-12-23 00:37:51,254 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [987345172] [2020-12-23 00:37:51,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:37:51,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:37:51,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-23 00:37:51,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:37:51,402 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2020-12-23 00:37:51,403 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:37:51,404 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:37:51,405 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:37:51,405 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:9 [2020-12-23 00:37:51,598 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 00:37:51,602 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 00:37:51,605 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 00:37:51,652 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-12-23 00:37:51,653 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:37:51,653 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 9] total 25 [2020-12-23 00:37:51,654 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061264839] [2020-12-23 00:37:51,654 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-12-23 00:37:51,655 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:37:51,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-12-23 00:37:51,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2020-12-23 00:37:51,656 INFO L87 Difference]: Start difference. First operand 52 states and 63 transitions. Second operand 25 states. [2020-12-23 00:37:56,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:37:56,220 INFO L93 Difference]: Finished difference Result 306 states and 355 transitions. [2020-12-23 00:37:56,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2020-12-23 00:37:56,221 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 38 [2020-12-23 00:37:56,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:37:56,224 INFO L225 Difference]: With dead ends: 306 [2020-12-23 00:37:56,224 INFO L226 Difference]: Without dead ends: 304 [2020-12-23 00:37:56,229 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2375 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=1115, Invalid=6541, Unknown=0, NotChecked=0, Total=7656 [2020-12-23 00:37:56,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2020-12-23 00:37:56,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 66. [2020-12-23 00:37:56,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-12-23 00:37:56,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 82 transitions. [2020-12-23 00:37:56,246 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 82 transitions. Word has length 38 [2020-12-23 00:37:56,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:37:56,246 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 82 transitions. [2020-12-23 00:37:56,246 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-12-23 00:37:56,247 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 82 transitions. [2020-12-23 00:37:56,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-12-23 00:37:56,248 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:37:56,248 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:37:56,463 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2020-12-23 00:37:56,464 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:37:56,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:37:56,465 INFO L82 PathProgramCache]: Analyzing trace with hash -135300444, now seen corresponding path program 1 times [2020-12-23 00:37:56,466 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:37:56,466 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695312688] [2020-12-23 00:37:56,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:37:56,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:37:56,726 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 00:37:56,727 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695312688] [2020-12-23 00:37:56,727 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1769599762] [2020-12-23 00:37:56,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:37:56,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:37:56,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 31 conjunts are in the unsatisfiable core [2020-12-23 00:37:56,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:37:56,954 INFO L348 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2020-12-23 00:37:56,954 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 [2020-12-23 00:37:56,956 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:37:56,964 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:37:56,965 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:37:56,966 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:19 [2020-12-23 00:37:57,108 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 00:37:57,111 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 00:37:57,145 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-23 00:37:57,145 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:37:57,146 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 19 [2020-12-23 00:37:57,146 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312979772] [2020-12-23 00:37:57,146 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-23 00:37:57,147 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:37:57,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-23 00:37:57,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2020-12-23 00:37:57,148 INFO L87 Difference]: Start difference. First operand 66 states and 82 transitions. Second operand 19 states. [2020-12-23 00:37:58,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:37:58,381 INFO L93 Difference]: Finished difference Result 163 states and 203 transitions. [2020-12-23 00:37:58,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-12-23 00:37:58,382 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 38 [2020-12-23 00:37:58,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:37:58,383 INFO L225 Difference]: With dead ends: 163 [2020-12-23 00:37:58,383 INFO L226 Difference]: Without dead ends: 161 [2020-12-23 00:37:58,385 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 31 SyntacticMatches, 5 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 522 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=337, Invalid=1643, Unknown=0, NotChecked=0, Total=1980 [2020-12-23 00:37:58,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-12-23 00:37:58,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 56. [2020-12-23 00:37:58,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-12-23 00:37:58,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 67 transitions. [2020-12-23 00:37:58,398 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 67 transitions. Word has length 38 [2020-12-23 00:37:58,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:37:58,398 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 67 transitions. [2020-12-23 00:37:58,398 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-23 00:37:58,398 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 67 transitions. [2020-12-23 00:37:58,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-12-23 00:37:58,399 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:37:58,399 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:37:58,612 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:37:58,613 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:37:58,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:37:58,614 INFO L82 PathProgramCache]: Analyzing trace with hash -1279355238, now seen corresponding path program 2 times [2020-12-23 00:37:58,615 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:37:58,615 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994173608] [2020-12-23 00:37:58,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:37:58,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:38:00,109 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:38:00,110 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994173608] [2020-12-23 00:38:00,110 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [712952455] [2020-12-23 00:38:00,110 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:38:00,202 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 00:38:00,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:38:00,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 36 conjunts are in the unsatisfiable core [2020-12-23 00:38:00,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:38:00,378 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-23 00:38:00,789 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 00:38:00,808 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 00:38:00,858 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 00:38:00,859 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:38:00,859 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16] total 33 [2020-12-23 00:38:00,860 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067035563] [2020-12-23 00:38:00,860 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-12-23 00:38:00,860 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:38:00,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-12-23 00:38:00,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=947, Unknown=0, NotChecked=0, Total=1056 [2020-12-23 00:38:00,863 INFO L87 Difference]: Start difference. First operand 56 states and 67 transitions. Second operand 33 states. [2020-12-23 00:38:04,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:38:04,446 INFO L93 Difference]: Finished difference Result 177 states and 209 transitions. [2020-12-23 00:38:04,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-12-23 00:38:04,447 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 42 [2020-12-23 00:38:04,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:38:04,449 INFO L225 Difference]: With dead ends: 177 [2020-12-23 00:38:04,450 INFO L226 Difference]: Without dead ends: 145 [2020-12-23 00:38:04,452 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 33 SyntacticMatches, 4 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1284 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=675, Invalid=4437, Unknown=0, NotChecked=0, Total=5112 [2020-12-23 00:38:04,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2020-12-23 00:38:04,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 63. [2020-12-23 00:38:04,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-12-23 00:38:04,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 74 transitions. [2020-12-23 00:38:04,468 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 74 transitions. Word has length 42 [2020-12-23 00:38:04,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:38:04,468 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 74 transitions. [2020-12-23 00:38:04,469 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-12-23 00:38:04,469 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 74 transitions. [2020-12-23 00:38:04,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-12-23 00:38:04,470 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:38:04,470 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:38:04,683 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:38:04,684 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:38:04,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:38:04,687 INFO L82 PathProgramCache]: Analyzing trace with hash 1670167694, now seen corresponding path program 4 times [2020-12-23 00:38:04,687 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:38:04,687 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451956582] [2020-12-23 00:38:04,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:38:04,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:38:04,851 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 19 proven. 29 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-23 00:38:04,852 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451956582] [2020-12-23 00:38:04,852 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [935754434] [2020-12-23 00:38:04,853 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 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:38:04,931 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 00:38:04,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:38:04,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-23 00:38:04,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:38:05,145 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 32 proven. 16 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-23 00:38:05,146 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:38:05,146 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2020-12-23 00:38:05,147 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046374069] [2020-12-23 00:38:05,147 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-23 00:38:05,147 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:38:05,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-23 00:38:05,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=253, Unknown=0, NotChecked=0, Total=342 [2020-12-23 00:38:05,149 INFO L87 Difference]: Start difference. First operand 63 states and 74 transitions. Second operand 19 states. [2020-12-23 00:38:05,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:38:05,597 INFO L93 Difference]: Finished difference Result 112 states and 131 transitions. [2020-12-23 00:38:05,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-23 00:38:05,599 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 46 [2020-12-23 00:38:05,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:38:05,600 INFO L225 Difference]: With dead ends: 112 [2020-12-23 00:38:05,600 INFO L226 Difference]: Without dead ends: 74 [2020-12-23 00:38:05,601 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=162, Invalid=488, Unknown=0, NotChecked=0, Total=650 [2020-12-23 00:38:05,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-12-23 00:38:05,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 49. [2020-12-23 00:38:05,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-12-23 00:38:05,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 55 transitions. [2020-12-23 00:38:05,611 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 55 transitions. Word has length 46 [2020-12-23 00:38:05,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:38:05,612 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 55 transitions. [2020-12-23 00:38:05,612 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-23 00:38:05,612 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 55 transitions. [2020-12-23 00:38:05,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-12-23 00:38:05,613 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:38:05,613 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:38:05,822 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-12-23 00:38:05,823 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:38:05,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:38:05,824 INFO L82 PathProgramCache]: Analyzing trace with hash -1173702100, now seen corresponding path program 5 times [2020-12-23 00:38:05,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:38:05,825 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433460769] [2020-12-23 00:38:05,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:38:05,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:38:06,206 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 9 proven. 23 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2020-12-23 00:38:06,207 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433460769] [2020-12-23 00:38:06,207 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [852567990] [2020-12-23 00:38:06,207 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:38:06,354 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-12-23 00:38:06,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:38:06,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-23 00:38:06,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:38:06,720 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 16 proven. 16 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2020-12-23 00:38:06,721 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:38:06,721 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2020-12-23 00:38:06,721 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317812031] [2020-12-23 00:38:06,722 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-23 00:38:06,722 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:38:06,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-23 00:38:06,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=323, Unknown=0, NotChecked=0, Total=420 [2020-12-23 00:38:06,723 INFO L87 Difference]: Start difference. First operand 49 states and 55 transitions. Second operand 21 states. [2020-12-23 00:38:07,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:38:07,352 INFO L93 Difference]: Finished difference Result 81 states and 92 transitions. [2020-12-23 00:38:07,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-23 00:38:07,354 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 48 [2020-12-23 00:38:07,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:38:07,355 INFO L225 Difference]: With dead ends: 81 [2020-12-23 00:38:07,355 INFO L226 Difference]: Without dead ends: 60 [2020-12-23 00:38:07,356 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=187, Invalid=569, Unknown=0, NotChecked=0, Total=756 [2020-12-23 00:38:07,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-12-23 00:38:07,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 54. [2020-12-23 00:38:07,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-12-23 00:38:07,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 62 transitions. [2020-12-23 00:38:07,367 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 62 transitions. Word has length 48 [2020-12-23 00:38:07,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:38:07,368 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 62 transitions. [2020-12-23 00:38:07,368 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-23 00:38:07,368 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 62 transitions. [2020-12-23 00:38:07,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-12-23 00:38:07,369 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:38:07,369 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:38:07,574 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-12-23 00:38:07,575 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:38:07,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:38:07,577 INFO L82 PathProgramCache]: Analyzing trace with hash -49846830, now seen corresponding path program 6 times [2020-12-23 00:38:07,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:38:07,577 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920438025] [2020-12-23 00:38:07,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:38:07,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:38:08,096 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 12 proven. 31 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2020-12-23 00:38:08,097 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920438025] [2020-12-23 00:38:08,097 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [468746904] [2020-12-23 00:38:08,097 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:38:08,251 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-12-23 00:38:08,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:38:08,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 27 conjunts are in the unsatisfiable core [2020-12-23 00:38:08,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:38:08,355 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2020-12-23 00:38:08,356 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:38:08,363 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:38:08,364 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:38:08,365 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:20 [2020-12-23 00:38:08,416 INFO L348 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2020-12-23 00:38:08,417 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 [2020-12-23 00:38:08,419 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:38:08,426 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:38:08,427 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:38:08,428 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:19 [2020-12-23 00:38:08,708 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 00:38:08,713 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 00:38:08,758 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-12-23 00:38:08,759 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:38:08,759 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2020-12-23 00:38:08,760 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435457279] [2020-12-23 00:38:08,760 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-12-23 00:38:08,760 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:38:08,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-12-23 00:38:08,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2020-12-23 00:38:08,762 INFO L87 Difference]: Start difference. First operand 54 states and 62 transitions. Second operand 24 states. [2020-12-23 00:38:10,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:38:10,470 INFO L93 Difference]: Finished difference Result 200 states and 235 transitions. [2020-12-23 00:38:10,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-12-23 00:38:10,472 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 53 [2020-12-23 00:38:10,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:38:10,474 INFO L225 Difference]: With dead ends: 200 [2020-12-23 00:38:10,475 INFO L226 Difference]: Without dead ends: 160 [2020-12-23 00:38:10,477 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 363 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=225, Invalid=1415, Unknown=0, NotChecked=0, Total=1640 [2020-12-23 00:38:10,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-12-23 00:38:10,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 69. [2020-12-23 00:38:10,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-12-23 00:38:10,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 82 transitions. [2020-12-23 00:38:10,500 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 82 transitions. Word has length 53 [2020-12-23 00:38:10,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:38:10,501 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 82 transitions. [2020-12-23 00:38:10,501 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-12-23 00:38:10,501 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 82 transitions. [2020-12-23 00:38:10,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-12-23 00:38:10,502 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:38:10,502 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 4, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:38:10,715 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-12-23 00:38:10,716 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:38:10,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:38:10,718 INFO L82 PathProgramCache]: Analyzing trace with hash 178236662, now seen corresponding path program 3 times [2020-12-23 00:38:10,718 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:38:10,718 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056621845] [2020-12-23 00:38:10,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:38:10,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:38:11,161 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 00:38:11,161 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056621845] [2020-12-23 00:38:11,162 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2145593531] [2020-12-23 00:38:11,162 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:38:11,399 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-12-23 00:38:11,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:38:11,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 24 conjunts are in the unsatisfiable core [2020-12-23 00:38:11,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:38:11,521 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 13 treesize of output 9 [2020-12-23 00:38:11,522 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:38:11,530 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:38:11,532 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:38:11,533 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:9 [2020-12-23 00:38:11,762 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 00:38:11,765 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 00:38:11,801 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-12-23 00:38:11,801 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:38:11,801 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2020-12-23 00:38:11,802 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033945976] [2020-12-23 00:38:11,802 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-12-23 00:38:11,802 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:38:11,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-12-23 00:38:11,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=571, Unknown=0, NotChecked=0, Total=650 [2020-12-23 00:38:11,804 INFO L87 Difference]: Start difference. First operand 69 states and 82 transitions. Second operand 26 states. [2020-12-23 00:38:15,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:38:15,688 INFO L93 Difference]: Finished difference Result 294 states and 382 transitions. [2020-12-23 00:38:15,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2020-12-23 00:38:15,689 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 55 [2020-12-23 00:38:15,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:38:15,694 INFO L225 Difference]: With dead ends: 294 [2020-12-23 00:38:15,694 INFO L226 Difference]: Without dead ends: 292 [2020-12-23 00:38:15,697 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 46 SyntacticMatches, 3 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2014 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=705, Invalid=5775, Unknown=0, NotChecked=0, Total=6480 [2020-12-23 00:38:15,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2020-12-23 00:38:15,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 67. [2020-12-23 00:38:15,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-12-23 00:38:15,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 79 transitions. [2020-12-23 00:38:15,717 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 79 transitions. Word has length 55 [2020-12-23 00:38:15,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:38:15,717 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 79 transitions. [2020-12-23 00:38:15,717 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-12-23 00:38:15,717 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 79 transitions. [2020-12-23 00:38:15,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-12-23 00:38:15,718 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:38:15,719 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 4, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:38:15,933 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:38:15,934 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:38:15,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:38:15,935 INFO L82 PathProgramCache]: Analyzing trace with hash 2124223606, now seen corresponding path program 2 times [2020-12-23 00:38:15,935 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:38:15,936 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109343572] [2020-12-23 00:38:15,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:38:15,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:38:16,476 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:38:16,476 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109343572] [2020-12-23 00:38:16,477 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1066727691] [2020-12-23 00:38:16,477 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:38:16,577 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 00:38:16,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:38:16,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 43 conjunts are in the unsatisfiable core [2020-12-23 00:38:16,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:38:16,805 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-23 00:38:17,015 INFO L348 Elim1Store]: treesize reduction 46, result has 20.7 percent of original size [2020-12-23 00:38:17,016 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 37 treesize of output 36 [2020-12-23 00:38:17,018 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:38:17,029 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:38:17,033 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. [2020-12-23 00:38:17,034 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:39 [2020-12-23 00:38:17,607 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 00:38:17,611 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 00:38:17,617 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 00:38:17,621 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-23 00:38:17,694 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 82 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-23 00:38:17,694 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:38:17,695 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 20] total 34 [2020-12-23 00:38:17,695 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785397207] [2020-12-23 00:38:17,695 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-12-23 00:38:17,696 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:38:17,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-12-23 00:38:17,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=990, Unknown=0, NotChecked=0, Total=1122 [2020-12-23 00:38:17,698 INFO L87 Difference]: Start difference. First operand 67 states and 79 transitions. Second operand 34 states. [2020-12-23 00:38:25,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:38:25,039 INFO L93 Difference]: Finished difference Result 489 states and 647 transitions. [2020-12-23 00:38:25,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2020-12-23 00:38:25,039 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 55 [2020-12-23 00:38:25,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:38:25,043 INFO L225 Difference]: With dead ends: 489 [2020-12-23 00:38:25,043 INFO L226 Difference]: Without dead ends: 487 [2020-12-23 00:38:25,048 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 43 SyntacticMatches, 6 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4361 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=1567, Invalid=11543, Unknown=0, NotChecked=0, Total=13110 [2020-12-23 00:38:25,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 487 states. [2020-12-23 00:38:25,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 487 to 73. [2020-12-23 00:38:25,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-12-23 00:38:25,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 86 transitions. [2020-12-23 00:38:25,070 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 86 transitions. Word has length 55 [2020-12-23 00:38:25,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:38:25,071 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 86 transitions. [2020-12-23 00:38:25,071 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-12-23 00:38:25,071 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 86 transitions. [2020-12-23 00:38:25,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-12-23 00:38:25,072 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:38:25,072 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:38:25,283 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-23 00:38:25,284 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:38:25,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:38:25,285 INFO L82 PathProgramCache]: Analyzing trace with hash 828798828, now seen corresponding path program 4 times [2020-12-23 00:38:25,286 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:38:25,286 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221700984] [2020-12-23 00:38:25,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:38:25,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:38:27,372 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 104 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:38:27,373 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221700984] [2020-12-23 00:38:27,373 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1922418360] [2020-12-23 00:38:27,373 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 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:38:27,444 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 00:38:27,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:38:27,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 32 conjunts are in the unsatisfiable core [2020-12-23 00:38:27,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:38:28,274 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 00:38:28,280 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 00:38:28,349 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-12-23 00:38:28,350 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:38:28,350 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 15] total 37 [2020-12-23 00:38:28,350 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420537126] [2020-12-23 00:38:28,351 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-12-23 00:38:28,351 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:38:28,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-12-23 00:38:28,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=1236, Unknown=0, NotChecked=0, Total=1332 [2020-12-23 00:38:28,353 INFO L87 Difference]: Start difference. First operand 73 states and 86 transitions. Second operand 37 states. [2020-12-23 00:38:39,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:38:39,923 INFO L93 Difference]: Finished difference Result 389 states and 445 transitions. [2020-12-23 00:38:39,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2020-12-23 00:38:39,925 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 59 [2020-12-23 00:38:39,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:38:39,927 INFO L225 Difference]: With dead ends: 389 [2020-12-23 00:38:39,927 INFO L226 Difference]: Without dead ends: 349 [2020-12-23 00:38:39,932 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 50 SyntacticMatches, 6 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4344 ImplicationChecksByTransitivity, 11.3s TimeCoverageRelationStatistics Valid=1675, Invalid=13577, Unknown=0, NotChecked=0, Total=15252 [2020-12-23 00:38:39,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2020-12-23 00:38:39,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 85. [2020-12-23 00:38:39,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-12-23 00:38:39,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 100 transitions. [2020-12-23 00:38:39,954 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 100 transitions. Word has length 59 [2020-12-23 00:38:39,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:38:39,954 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 100 transitions. [2020-12-23 00:38:39,955 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-12-23 00:38:39,955 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 100 transitions. [2020-12-23 00:38:39,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-12-23 00:38:39,955 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:38:39,956 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:38:40,171 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:38:40,172 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:38:40,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:38:40,173 INFO L82 PathProgramCache]: Analyzing trace with hash -2140830112, now seen corresponding path program 7 times [2020-12-23 00:38:40,174 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:38:40,174 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215255674] [2020-12-23 00:38:40,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:38:40,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:38:40,422 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 51 proven. 57 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-12-23 00:38:40,424 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215255674] [2020-12-23 00:38:40,424 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1504017211] [2020-12-23 00:38:40,424 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 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:38:40,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:38:40,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-23 00:38:40,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:38:40,866 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 72 proven. 36 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-12-23 00:38:40,866 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:38:40,866 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 25 [2020-12-23 00:38:40,867 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643608773] [2020-12-23 00:38:40,867 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-12-23 00:38:40,867 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:38:40,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-12-23 00:38:40,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=451, Unknown=0, NotChecked=0, Total=600 [2020-12-23 00:38:40,868 INFO L87 Difference]: Start difference. First operand 85 states and 100 transitions. Second operand 25 states. [2020-12-23 00:38:41,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:38:41,569 INFO L93 Difference]: Finished difference Result 148 states and 174 transitions. [2020-12-23 00:38:41,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-23 00:38:41,570 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 63 [2020-12-23 00:38:41,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:38:41,571 INFO L225 Difference]: With dead ends: 148 [2020-12-23 00:38:41,571 INFO L226 Difference]: Without dead ends: 97 [2020-12-23 00:38:41,572 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 284 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=281, Invalid=909, Unknown=0, NotChecked=0, Total=1190 [2020-12-23 00:38:41,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-12-23 00:38:41,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 66. [2020-12-23 00:38:41,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-12-23 00:38:41,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 74 transitions. [2020-12-23 00:38:41,591 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 74 transitions. Word has length 63 [2020-12-23 00:38:41,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:38:41,591 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 74 transitions. [2020-12-23 00:38:41,592 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-12-23 00:38:41,592 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 74 transitions. [2020-12-23 00:38:41,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-12-23 00:38:41,592 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:38:41,592 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:38:41,793 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:38:41,794 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:38:41,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:38:41,795 INFO L82 PathProgramCache]: Analyzing trace with hash -771049342, now seen corresponding path program 8 times [2020-12-23 00:38:41,795 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:38:41,795 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624883559] [2020-12-23 00:38:41,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:38:41,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:38:42,369 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 25 proven. 42 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2020-12-23 00:38:42,369 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624883559] [2020-12-23 00:38:42,370 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1452728155] [2020-12-23 00:38:42,371 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 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:38:42,467 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 00:38:42,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:38:42,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-23 00:38:42,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:38:43,087 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 36 proven. 31 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2020-12-23 00:38:43,088 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:38:43,088 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 27 [2020-12-23 00:38:43,088 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220595097] [2020-12-23 00:38:43,088 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-12-23 00:38:43,089 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:38:43,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-12-23 00:38:43,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=548, Unknown=0, NotChecked=0, Total=702 [2020-12-23 00:38:43,090 INFO L87 Difference]: Start difference. First operand 66 states and 74 transitions. Second operand 27 states. [2020-12-23 00:38:44,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:38:44,303 INFO L93 Difference]: Finished difference Result 112 states and 128 transitions. [2020-12-23 00:38:44,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-23 00:38:44,304 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 65 [2020-12-23 00:38:44,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:38:44,304 INFO L225 Difference]: With dead ends: 112 [2020-12-23 00:38:44,305 INFO L226 Difference]: Without dead ends: 83 [2020-12-23 00:38:44,306 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 53 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=315, Invalid=1017, Unknown=0, NotChecked=0, Total=1332 [2020-12-23 00:38:44,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-12-23 00:38:44,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 71. [2020-12-23 00:38:44,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-12-23 00:38:44,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 81 transitions. [2020-12-23 00:38:44,328 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 81 transitions. Word has length 65 [2020-12-23 00:38:44,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:38:44,329 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 81 transitions. [2020-12-23 00:38:44,329 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-12-23 00:38:44,329 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 81 transitions. [2020-12-23 00:38:44,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-12-23 00:38:44,330 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:38:44,330 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:38:44,530 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-12-23 00:38:44,531 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:38:44,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:38:44,532 INFO L82 PathProgramCache]: Analyzing trace with hash -1827931244, now seen corresponding path program 9 times [2020-12-23 00:38:44,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:38:44,532 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797485376] [2020-12-23 00:38:44,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:38:44,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:38:45,365 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 23 proven. 60 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2020-12-23 00:38:45,366 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797485376] [2020-12-23 00:38:45,366 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1197875693] [2020-12-23 00:38:45,366 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 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:38:45,595 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-12-23 00:38:45,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:38:45,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 31 conjunts are in the unsatisfiable core [2020-12-23 00:38:45,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:38:45,748 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2020-12-23 00:38:45,749 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:38:45,756 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:38:45,758 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:38:45,759 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:20 [2020-12-23 00:38:45,824 INFO L348 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2020-12-23 00:38:45,824 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 [2020-12-23 00:38:45,826 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:38:45,833 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:38:45,834 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:38:45,834 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:19 [2020-12-23 00:38:46,245 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 00:38:46,247 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 00:38:46,300 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2020-12-23 00:38:46,301 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:38:46,301 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2020-12-23 00:38:46,301 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145285529] [2020-12-23 00:38:46,301 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-12-23 00:38:46,301 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:38:46,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-12-23 00:38:46,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=767, Unknown=0, NotChecked=0, Total=870 [2020-12-23 00:38:46,302 INFO L87 Difference]: Start difference. First operand 71 states and 81 transitions. Second operand 30 states. [2020-12-23 00:38:49,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:38:49,133 INFO L93 Difference]: Finished difference Result 254 states and 299 transitions. [2020-12-23 00:38:49,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-12-23 00:38:49,136 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 70 [2020-12-23 00:38:49,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:38:49,137 INFO L225 Difference]: With dead ends: 254 [2020-12-23 00:38:49,137 INFO L226 Difference]: Without dead ends: 201 [2020-12-23 00:38:49,138 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 57 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 609 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=317, Invalid=2233, Unknown=0, NotChecked=0, Total=2550 [2020-12-23 00:38:49,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2020-12-23 00:38:49,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 86. [2020-12-23 00:38:49,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-12-23 00:38:49,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 101 transitions. [2020-12-23 00:38:49,157 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 101 transitions. Word has length 70 [2020-12-23 00:38:49,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:38:49,158 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 101 transitions. [2020-12-23 00:38:49,158 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-12-23 00:38:49,158 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 101 transitions. [2020-12-23 00:38:49,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-12-23 00:38:49,159 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:38:49,159 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 6, 6, 6, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:38:49,374 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:38:49,375 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:38:49,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:38:49,376 INFO L82 PathProgramCache]: Analyzing trace with hash -29093964, now seen corresponding path program 5 times [2020-12-23 00:38:49,376 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:38:49,376 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842180477] [2020-12-23 00:38:49,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:38:49,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:38:49,946 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 00:38:49,947 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842180477] [2020-12-23 00:38:49,947 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1655622725] [2020-12-23 00:38:49,947 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:38:50,419 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-12-23 00:38:50,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:38:50,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 27 conjunts are in the unsatisfiable core [2020-12-23 00:38:50,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:38:50,493 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2020-12-23 00:38:50,494 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:38:50,505 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:38:50,507 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. [2020-12-23 00:38:50,508 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:23 [2020-12-23 00:38:51,202 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 00:38:51,204 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 00:38:51,206 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 00:38:51,261 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2020-12-23 00:38:51,261 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:38:51,261 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 15] total 27 [2020-12-23 00:38:51,261 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798122496] [2020-12-23 00:38:51,262 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-12-23 00:38:51,262 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:38:51,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-12-23 00:38:51,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=619, Unknown=0, NotChecked=0, Total=702 [2020-12-23 00:38:51,263 INFO L87 Difference]: Start difference. First operand 86 states and 101 transitions. Second operand 27 states. [2020-12-23 00:39:05,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:39:05,247 INFO L93 Difference]: Finished difference Result 1017 states and 1377 transitions. [2020-12-23 00:39:05,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 236 states. [2020-12-23 00:39:05,248 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 72 [2020-12-23 00:39:05,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:39:05,254 INFO L225 Difference]: With dead ends: 1017 [2020-12-23 00:39:05,254 INFO L226 Difference]: Without dead ends: 1015 [2020-12-23 00:39:05,262 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 308 GetRequests, 61 SyntacticMatches, 9 SemanticMatches, 238 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24955 ImplicationChecksByTransitivity, 10.2s TimeCoverageRelationStatistics Valid=3745, Invalid=53615, Unknown=0, NotChecked=0, Total=57360 [2020-12-23 00:39:05,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1015 states. [2020-12-23 00:39:05,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1015 to 84. [2020-12-23 00:39:05,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-12-23 00:39:05,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 98 transitions. [2020-12-23 00:39:05,305 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 98 transitions. Word has length 72 [2020-12-23 00:39:05,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:39:05,306 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 98 transitions. [2020-12-23 00:39:05,306 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-12-23 00:39:05,306 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 98 transitions. [2020-12-23 00:39:05,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-12-23 00:39:05,307 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:39:05,307 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 6, 6, 6, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:39:05,517 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-12-23 00:39:05,517 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:39:05,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:39:05,518 INFO L82 PathProgramCache]: Analyzing trace with hash -803080396, now seen corresponding path program 3 times [2020-12-23 00:39:05,519 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:39:05,519 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938045299] [2020-12-23 00:39:05,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:39:05,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:39:06,119 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 00:39:06,119 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938045299] [2020-12-23 00:39:06,119 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2133170756] [2020-12-23 00:39:06,120 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 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:39:06,471 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-12-23 00:39:06,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:39:06,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 52 conjunts are in the unsatisfiable core [2020-12-23 00:39:06,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:39:06,538 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2020-12-23 00:39:06,539 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:39:06,546 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:39:06,548 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:39:06,549 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:19, output treesize:3 [2020-12-23 00:39:06,558 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2020-12-23 00:39:06,559 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:39:06,569 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:39:06,571 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:39:06,572 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:22, output treesize:7 [2020-12-23 00:39:06,792 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2020-12-23 00:39:06,794 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:39:06,807 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:39:06,809 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:39:06,809 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:28 [2020-12-23 00:39:06,898 INFO L348 Elim1Store]: treesize reduction 46, result has 20.7 percent of original size [2020-12-23 00:39:06,899 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 37 treesize of output 36 [2020-12-23 00:39:06,900 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:39:06,917 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:39:06,919 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:39:06,919 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:48, output treesize:44 [2020-12-23 00:39:07,129 INFO L348 Elim1Store]: treesize reduction 108, result has 18.8 percent of original size [2020-12-23 00:39:07,130 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 53 treesize of output 55 [2020-12-23 00:39:07,135 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:39:07,155 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:39:07,157 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:39:07,157 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:64, output treesize:60 [2020-12-23 00:39:07,322 INFO L348 Elim1Store]: treesize reduction 189, result has 16.4 percent of original size [2020-12-23 00:39:07,323 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 69 treesize of output 74 [2020-12-23 00:39:07,325 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:39:07,352 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:39:07,354 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:39:07,354 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:80, output treesize:76 [2020-12-23 00:39:07,719 WARN L197 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 41 [2020-12-23 00:39:07,721 INFO L348 Elim1Store]: treesize reduction 138, result has 42.3 percent of original size [2020-12-23 00:39:07,721 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 55 treesize of output 129 [2020-12-23 00:39:07,724 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:39:07,805 INFO L625 ElimStorePlain]: treesize reduction 50, result has 55.4 percent of original size [2020-12-23 00:39:07,806 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:39:07,806 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:66, output treesize:62 [2020-12-23 00:39:08,109 WARN L197 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 46 [2020-12-23 00:39:08,110 INFO L348 Elim1Store]: treesize reduction 235, result has 33.6 percent of original size [2020-12-23 00:39:08,111 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 15 case distinctions, treesize of input 71 treesize of output 154 [2020-12-23 00:39:08,116 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:39:08,225 WARN L197 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 41 [2020-12-23 00:39:08,226 INFO L625 ElimStorePlain]: treesize reduction 52, result has 60.0 percent of original size [2020-12-23 00:39:08,228 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:39:08,228 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:82, output treesize:78 [2020-12-23 00:39:09,114 WARN L197 SmtUtils]: Spent 285.00 ms on a formula simplification. DAG size of input: 165 DAG size of output: 56 [2020-12-23 00:39:09,115 INFO L348 Elim1Store]: treesize reduction 495, result has 22.4 percent of original size [2020-12-23 00:39:09,116 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 28 case distinctions, treesize of input 103 treesize of output 192 [2020-12-23 00:39:09,121 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:39:09,231 WARN L197 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 53 [2020-12-23 00:39:09,232 INFO L625 ElimStorePlain]: treesize reduction 52, result has 68.3 percent of original size [2020-12-23 00:39:09,234 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:39:09,235 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:116, output treesize:112 [2020-12-23 00:39:10,621 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 00:39:10,625 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 9 disjuncts [2020-12-23 00:39:10,774 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 15 proven. 106 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2020-12-23 00:39:10,775 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:39:10,775 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 29] total 47 [2020-12-23 00:39:10,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212793797] [2020-12-23 00:39:10,776 INFO L461 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-12-23 00:39:10,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:39:10,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-12-23 00:39:10,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=259, Invalid=1903, Unknown=0, NotChecked=0, Total=2162 [2020-12-23 00:39:10,777 INFO L87 Difference]: Start difference. First operand 84 states and 98 transitions. Second operand 47 states. [2020-12-23 00:39:18,068 WARN L197 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 58 [2020-12-23 00:39:19,503 WARN L197 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 57 [2020-12-23 00:39:20,984 WARN L197 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 51 [2020-12-23 00:39:22,280 WARN L197 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 61 [2020-12-23 00:39:22,485 WARN L197 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 57 [2020-12-23 00:39:22,670 WARN L197 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 57 [2020-12-23 00:39:22,840 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 53 [2020-12-23 00:39:24,293 WARN L197 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 65 [2020-12-23 00:39:24,494 WARN L197 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 61 [2020-12-23 00:39:24,677 WARN L197 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 61 [2020-12-23 00:39:24,854 WARN L197 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 57 [2020-12-23 00:39:25,039 WARN L197 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 61 [2020-12-23 00:39:25,215 WARN L197 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 57 [2020-12-23 00:39:25,389 WARN L197 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 57 [2020-12-23 00:39:25,571 WARN L197 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 53 [2020-12-23 00:39:27,965 WARN L197 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 58 [2020-12-23 00:39:36,431 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 54 [2020-12-23 00:39:42,252 WARN L197 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 50 [2020-12-23 00:39:44,351 WARN L197 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 57 [2020-12-23 00:39:44,737 WARN L197 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2020-12-23 00:39:45,434 WARN L197 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 53 [2020-12-23 00:39:45,632 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 50 [2020-12-23 00:39:46,180 WARN L197 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 54 [2020-12-23 00:39:46,381 WARN L197 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 53 [2020-12-23 00:39:46,819 WARN L197 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 50 [2020-12-23 00:39:47,459 WARN L197 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 51 [2020-12-23 00:39:47,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:39:47,605 INFO L93 Difference]: Finished difference Result 1503 states and 2059 transitions. [2020-12-23 00:39:47,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 280 states. [2020-12-23 00:39:47,606 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 72 [2020-12-23 00:39:47,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:39:47,614 INFO L225 Difference]: With dead ends: 1503 [2020-12-23 00:39:47,615 INFO L226 Difference]: Without dead ends: 1501 [2020-12-23 00:39:47,624 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 368 GetRequests, 49 SyntacticMatches, 4 SemanticMatches, 315 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43884 ImplicationChecksByTransitivity, 32.8s TimeCoverageRelationStatistics Valid=9434, Invalid=90738, Unknown=0, NotChecked=0, Total=100172 [2020-12-23 00:39:47,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1501 states. [2020-12-23 00:39:47,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1501 to 104. [2020-12-23 00:39:47,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-12-23 00:39:47,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 124 transitions. [2020-12-23 00:39:47,671 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 124 transitions. Word has length 72 [2020-12-23 00:39:47,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:39:47,672 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 124 transitions. [2020-12-23 00:39:47,672 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-12-23 00:39:47,672 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 124 transitions. [2020-12-23 00:39:47,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-12-23 00:39:47,673 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:39:47,673 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 7, 7, 7, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:39:47,887 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-12-23 00:39:47,888 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:39:47,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:39:47,889 INFO L82 PathProgramCache]: Analyzing trace with hash 578767658, now seen corresponding path program 6 times [2020-12-23 00:39:47,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:39:47,889 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394005319] [2020-12-23 00:39:47,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:39:47,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:39:48,755 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:39:48,755 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394005319] [2020-12-23 00:39:48,755 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [476149139] [2020-12-23 00:39:48,756 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:39:49,204 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-12-23 00:39:49,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:39:49,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 33 conjunts are in the unsatisfiable core [2020-12-23 00:39:49,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:39:49,871 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 00:39:49,872 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 00:39:49,945 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2020-12-23 00:39:49,946 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:39:49,946 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 17] total 30 [2020-12-23 00:39:49,946 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586248638] [2020-12-23 00:39:49,946 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-12-23 00:39:49,946 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:39:49,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-12-23 00:39:49,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=786, Unknown=0, NotChecked=0, Total=870 [2020-12-23 00:39:49,947 INFO L87 Difference]: Start difference. First operand 104 states and 124 transitions. Second operand 30 states. [2020-12-23 00:40:11,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:40:11,869 INFO L93 Difference]: Finished difference Result 1704 states and 2336 transitions. [2020-12-23 00:40:11,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 270 states. [2020-12-23 00:40:11,872 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 76 [2020-12-23 00:40:11,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:40:11,880 INFO L225 Difference]: With dead ends: 1704 [2020-12-23 00:40:11,880 INFO L226 Difference]: Without dead ends: 1702 [2020-12-23 00:40:11,884 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 352 GetRequests, 67 SyntacticMatches, 7 SemanticMatches, 278 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34469 ImplicationChecksByTransitivity, 15.7s TimeCoverageRelationStatistics Valid=5283, Invalid=72837, Unknown=0, NotChecked=0, Total=78120 [2020-12-23 00:40:11,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1702 states. [2020-12-23 00:40:11,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1702 to 81. [2020-12-23 00:40:11,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-12-23 00:40:11,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 91 transitions. [2020-12-23 00:40:11,930 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 91 transitions. Word has length 76 [2020-12-23 00:40:11,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:40:11,931 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 91 transitions. [2020-12-23 00:40:11,931 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-12-23 00:40:11,931 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 91 transitions. [2020-12-23 00:40:11,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-12-23 00:40:11,932 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:40:11,932 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:40:12,147 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:40:12,148 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:40:12,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:40:12,149 INFO L82 PathProgramCache]: Analyzing trace with hash 1696722206, now seen corresponding path program 10 times [2020-12-23 00:40:12,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:40:12,150 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304638725] [2020-12-23 00:40:12,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:40:12,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:40:12,657 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 99 proven. 93 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2020-12-23 00:40:12,658 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304638725] [2020-12-23 00:40:12,658 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [538418344] [2020-12-23 00:40:12,658 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 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:40:12,764 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 00:40:12,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:40:12,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-23 00:40:12,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:40:13,552 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 128 proven. 64 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2020-12-23 00:40:13,552 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:40:13,552 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 31 [2020-12-23 00:40:13,553 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596559101] [2020-12-23 00:40:13,553 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-12-23 00:40:13,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:40:13,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-12-23 00:40:13,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=225, Invalid=705, Unknown=0, NotChecked=0, Total=930 [2020-12-23 00:40:13,554 INFO L87 Difference]: Start difference. First operand 81 states and 91 transitions. Second operand 31 states. [2020-12-23 00:40:14,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:40:14,863 INFO L93 Difference]: Finished difference Result 220 states and 257 transitions. [2020-12-23 00:40:14,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-12-23 00:40:14,865 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 80 [2020-12-23 00:40:14,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:40:14,867 INFO L225 Difference]: With dead ends: 220 [2020-12-23 00:40:14,867 INFO L226 Difference]: Without dead ends: 120 [2020-12-23 00:40:14,868 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 465 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=433, Invalid=1459, Unknown=0, NotChecked=0, Total=1892 [2020-12-23 00:40:14,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-12-23 00:40:14,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 83. [2020-12-23 00:40:14,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-12-23 00:40:14,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 93 transitions. [2020-12-23 00:40:14,906 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 93 transitions. Word has length 80 [2020-12-23 00:40:14,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:40:14,907 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 93 transitions. [2020-12-23 00:40:14,907 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-12-23 00:40:14,907 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 93 transitions. [2020-12-23 00:40:14,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-12-23 00:40:14,908 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:40:14,908 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:40:15,122 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-12-23 00:40:15,122 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:40:15,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:40:15,124 INFO L82 PathProgramCache]: Analyzing trace with hash -1951988932, now seen corresponding path program 11 times [2020-12-23 00:40:15,124 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:40:15,124 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27476954] [2020-12-23 00:40:15,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:40:15,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:40:16,179 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 49 proven. 66 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2020-12-23 00:40:16,180 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27476954] [2020-12-23 00:40:16,180 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1454404789] [2020-12-23 00:40:16,180 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 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:40:16,508 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-12-23 00:40:16,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:40:16,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-23 00:40:16,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:40:17,704 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 64 proven. 51 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2020-12-23 00:40:17,704 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:40:17,704 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 33 [2020-12-23 00:40:17,705 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916192322] [2020-12-23 00:40:17,705 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-12-23 00:40:17,705 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:40:17,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-12-23 00:40:17,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=830, Unknown=0, NotChecked=0, Total=1056 [2020-12-23 00:40:17,706 INFO L87 Difference]: Start difference. First operand 83 states and 93 transitions. Second operand 33 states. [2020-12-23 00:40:19,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:40:19,978 INFO L93 Difference]: Finished difference Result 143 states and 164 transitions. [2020-12-23 00:40:19,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-23 00:40:19,980 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 82 [2020-12-23 00:40:19,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:40:19,981 INFO L225 Difference]: With dead ends: 143 [2020-12-23 00:40:19,981 INFO L226 Difference]: Without dead ends: 106 [2020-12-23 00:40:19,982 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 67 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 499 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=477, Invalid=1593, Unknown=0, NotChecked=0, Total=2070 [2020-12-23 00:40:19,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-12-23 00:40:20,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 88. [2020-12-23 00:40:20,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-12-23 00:40:20,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 100 transitions. [2020-12-23 00:40:20,010 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 100 transitions. Word has length 82 [2020-12-23 00:40:20,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:40:20,010 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 100 transitions. [2020-12-23 00:40:20,010 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-12-23 00:40:20,010 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 100 transitions. [2020-12-23 00:40:20,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-12-23 00:40:20,011 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:40:20,011 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:40:20,211 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:40:20,212 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:40:20,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:40:20,213 INFO L82 PathProgramCache]: Analyzing trace with hash 1954581362, now seen corresponding path program 12 times [2020-12-23 00:40:20,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:40:20,214 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369345008] [2020-12-23 00:40:20,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:40:20,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:40:21,592 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 39 proven. 97 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2020-12-23 00:40:21,592 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369345008] [2020-12-23 00:40:21,592 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1997067177] [2020-12-23 00:40:21,593 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 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:40:22,867 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-12-23 00:40:22,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:40:22,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-23 00:40:22,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:40:23,974 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 55 proven. 81 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2020-12-23 00:40:23,974 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:40:23,975 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 35 [2020-12-23 00:40:23,975 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296817841] [2020-12-23 00:40:23,975 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-12-23 00:40:23,975 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:40:23,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-12-23 00:40:23,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=951, Unknown=0, NotChecked=0, Total=1190 [2020-12-23 00:40:23,976 INFO L87 Difference]: Start difference. First operand 88 states and 100 transitions. Second operand 35 states. [2020-12-23 00:40:25,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:40:25,516 INFO L93 Difference]: Finished difference Result 157 states and 181 transitions. [2020-12-23 00:40:25,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-23 00:40:25,519 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 87 [2020-12-23 00:40:25,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:40:25,519 INFO L225 Difference]: With dead ends: 157 [2020-12-23 00:40:25,520 INFO L226 Difference]: Without dead ends: 91 [2020-12-23 00:40:25,520 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 72 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 569 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=409, Invalid=1397, Unknown=0, NotChecked=0, Total=1806 [2020-12-23 00:40:25,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-12-23 00:40:25,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 90. [2020-12-23 00:40:25,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-12-23 00:40:25,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 102 transitions. [2020-12-23 00:40:25,561 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 102 transitions. Word has length 87 [2020-12-23 00:40:25,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:40:25,562 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 102 transitions. [2020-12-23 00:40:25,562 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-12-23 00:40:25,562 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 102 transitions. [2020-12-23 00:40:25,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-12-23 00:40:25,563 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:40:25,563 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 8, 8, 8, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:40:25,776 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-12-23 00:40:25,777 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:40:25,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:40:25,778 INFO L82 PathProgramCache]: Analyzing trace with hash 1687811988, now seen corresponding path program 13 times [2020-12-23 00:40:25,778 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:40:25,778 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446389462] [2020-12-23 00:40:25,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:40:25,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:40:27,037 INFO L134 CoverageAnalysis]: Checked inductivity of 283 backedges. 0 proven. 282 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 00:40:27,038 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446389462] [2020-12-23 00:40:27,038 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2083561506] [2020-12-23 00:40:27,038 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 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:40:27,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:40:27,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 34 conjunts are in the unsatisfiable core [2020-12-23 00:40:27,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:40:27,498 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2020-12-23 00:40:27,500 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:40:27,510 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:40:27,512 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:40:27,512 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:20 [2020-12-23 00:40:27,617 INFO L348 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2020-12-23 00:40:27,618 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 [2020-12-23 00:40:27,624 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:40:27,634 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:40:27,635 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:40:27,636 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:19 [2020-12-23 00:40:28,579 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 00:40:28,585 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 00:40:28,683 INFO L134 CoverageAnalysis]: Checked inductivity of 283 backedges. 0 proven. 183 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-12-23 00:40:28,683 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:40:28,684 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 19] total 41 [2020-12-23 00:40:28,684 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166431464] [2020-12-23 00:40:28,684 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-12-23 00:40:28,684 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:40:28,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-12-23 00:40:28,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=1513, Unknown=0, NotChecked=0, Total=1640 [2020-12-23 00:40:28,685 INFO L87 Difference]: Start difference. First operand 90 states and 102 transitions. Second operand 41 states. [2020-12-23 00:40:41,674 WARN L197 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 43 [2020-12-23 00:40:52,871 WARN L197 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 44 [2020-12-23 00:40:58,797 WARN L197 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 50 [2020-12-23 00:40:59,029 WARN L197 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 44 [2020-12-23 00:40:59,233 WARN L197 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 45 [2020-12-23 00:40:59,619 WARN L197 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 44 [2020-12-23 00:41:00,385 WARN L197 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 46 [2020-12-23 00:41:03,673 WARN L197 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 46 [2020-12-23 00:41:03,904 WARN L197 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 40 [2020-12-23 00:41:04,103 WARN L197 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 41 [2020-12-23 00:41:04,495 WARN L197 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 40 [2020-12-23 00:41:09,024 WARN L197 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 44 [2020-12-23 00:41:10,587 WARN L197 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 33 [2020-12-23 00:41:21,985 WARN L197 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 50 [2020-12-23 00:41:22,222 WARN L197 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 44 [2020-12-23 00:41:22,432 WARN L197 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 45 [2020-12-23 00:41:22,634 WARN L197 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 39 [2020-12-23 00:41:22,840 WARN L197 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 44 [2020-12-23 00:41:23,045 WARN L197 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 38 [2020-12-23 00:41:23,240 WARN L197 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 39 [2020-12-23 00:41:23,456 WARN L197 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 33 [2020-12-23 00:41:23,665 WARN L197 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 45 [2020-12-23 00:41:23,868 WARN L197 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 39 [2020-12-23 00:41:24,059 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 40 [2020-12-23 00:41:24,438 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 39 [2020-12-23 00:41:25,216 WARN L197 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 46 [2020-12-23 00:41:32,908 WARN L197 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 36 [2020-12-23 00:41:33,215 WARN L197 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 56 [2020-12-23 00:41:33,472 WARN L197 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 50 [2020-12-23 00:41:33,703 WARN L197 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 50 [2020-12-23 00:41:33,923 WARN L197 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 44 [2020-12-23 00:41:34,156 WARN L197 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 51 [2020-12-23 00:41:34,389 WARN L197 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 45 [2020-12-23 00:41:34,645 WARN L197 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 45 [2020-12-23 00:41:34,855 WARN L197 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 39 [2020-12-23 00:41:35,079 WARN L197 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 50 [2020-12-23 00:41:35,294 WARN L197 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 44 [2020-12-23 00:41:35,507 WARN L197 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 44 [2020-12-23 00:41:35,715 WARN L197 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 38 [2020-12-23 00:41:35,929 WARN L197 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 45 [2020-12-23 00:41:36,133 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 39 [2020-12-23 00:41:36,339 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 39 [2020-12-23 00:41:36,773 WARN L197 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 51