/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/array-tiling/pr2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-dcfa08f [2020-12-23 00:34:27,859 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-23 00:34:27,867 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-23 00:34:27,927 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-23 00:34:27,929 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-23 00:34:27,932 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-23 00:34:27,935 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-23 00:34:27,939 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-23 00:34:27,943 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-23 00:34:27,946 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-23 00:34:27,949 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-23 00:34:27,952 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-23 00:34:27,953 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-23 00:34:27,956 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-23 00:34:27,958 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-23 00:34:27,961 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-23 00:34:27,963 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-23 00:34:27,965 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-23 00:34:27,969 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-23 00:34:27,972 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-23 00:34:27,974 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-23 00:34:27,976 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-23 00:34:27,987 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-23 00:34:27,990 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-23 00:34:27,999 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-23 00:34:28,038 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-23 00:34:28,041 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-23 00:34:28,052 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-23 00:34:28,054 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 00:34:28,147 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-23 00:34:28,148 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-23 00:34:28,149 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-23 00:34:28,150 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-23 00:34:28,150 INFO L138 SettingsManager]: * Use SBE=true [2020-12-23 00:34:28,150 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-23 00:34:28,150 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-23 00:34:28,151 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-23 00:34:28,151 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-23 00:34:28,151 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-23 00:34:28,151 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-23 00:34:28,151 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-23 00:34:28,152 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-23 00:34:28,152 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-23 00:34:28,152 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-23 00:34:28,152 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-23 00:34:28,152 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-23 00:34:28,153 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 00:34:28,153 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-23 00:34:28,153 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-23 00:34:28,154 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-23 00:34:28,154 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-23 00:34:28,154 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-23 00:34:28,154 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-23 00:34:28,155 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-23 00:34:28,155 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-23 00:34:28,681 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-23 00:34:28,746 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-23 00:34:28,752 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-23 00:34:28,755 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-23 00:34:28,757 INFO L275 PluginConnector]: CDTParser initialized [2020-12-23 00:34:28,759 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-tiling/pr2.c [2020-12-23 00:34:28,907 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/ec3cfad74/07488e4570464b01a99ec6976ce18140/FLAGcd46e0ba9 [2020-12-23 00:34:29,867 INFO L306 CDTParser]: Found 1 translation units. [2020-12-23 00:34:29,868 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-tiling/pr2.c [2020-12-23 00:34:29,882 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/ec3cfad74/07488e4570464b01a99ec6976ce18140/FLAGcd46e0ba9 [2020-12-23 00:34:30,175 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/ec3cfad74/07488e4570464b01a99ec6976ce18140 [2020-12-23 00:34:30,182 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-23 00:34:30,186 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-23 00:34:30,190 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-23 00:34:30,190 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-23 00:34:30,199 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-23 00:34:30,201 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 12:34:30" (1/1) ... [2020-12-23 00:34:30,207 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3ee23663 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:34:30, skipping insertion in model container [2020-12-23 00:34:30,207 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 12:34:30" (1/1) ... [2020-12-23 00:34:30,222 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-23 00:34:30,257 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-23 00:34:30,504 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-tiling/pr2.c[394,407] left hand side expression in assignment: lhs: VariableLHS[~CELLCOUNT~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~volArray~0,],[BinaryExpression[ARITHMINUS,BinaryExpression[ARITHMUL,IntegerLiteral[2],IdentifierExpression[~i~0,]],IntegerLiteral[2]]]] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~volArray~0,],[BinaryExpression[ARITHMINUS,BinaryExpression[ARITHMUL,IntegerLiteral[2],IdentifierExpression[~i~0,]],IntegerLiteral[2]]]] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~volArray~0,],[BinaryExpression[ARITHMINUS,BinaryExpression[ARITHMUL,IntegerLiteral[2],IdentifierExpression[~i~0,]],IntegerLiteral[1]]]] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~volArray~0,],[BinaryExpression[ARITHMINUS,BinaryExpression[ARITHMUL,IntegerLiteral[2],IdentifierExpression[~i~0,]],IntegerLiteral[1]]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] [2020-12-23 00:34:30,546 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 00:34:30,566 INFO L203 MainTranslator]: Completed pre-run [2020-12-23 00:34:30,591 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-tiling/pr2.c[394,407] left hand side expression in assignment: lhs: VariableLHS[~CELLCOUNT~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#volArray~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#volArray~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],BinaryExpression[ARITHMINUS,BinaryExpression[ARITHMUL,IntegerLiteral[2],IdentifierExpression[~i~0,]],IntegerLiteral[2]]]]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#volArray~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#volArray~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],BinaryExpression[ARITHMINUS,BinaryExpression[ARITHMUL,IntegerLiteral[2],IdentifierExpression[~i~0,]],IntegerLiteral[2]]]]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#volArray~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#volArray~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],BinaryExpression[ARITHMINUS,BinaryExpression[ARITHMUL,IntegerLiteral[2],IdentifierExpression[~i~0,]],IntegerLiteral[1]]]]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#volArray~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#volArray~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],BinaryExpression[ARITHMINUS,BinaryExpression[ARITHMUL,IntegerLiteral[2],IdentifierExpression[~i~0,]],IntegerLiteral[1]]]]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] [2020-12-23 00:34:30,610 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 00:34:30,649 INFO L208 MainTranslator]: Completed translation [2020-12-23 00:34:30,650 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:34:30 WrapperNode [2020-12-23 00:34:30,651 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-23 00:34:30,655 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-23 00:34:30,658 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-23 00:34:30,659 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-23 00:34:30,677 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:34:30" (1/1) ... [2020-12-23 00:34:30,700 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:34:30" (1/1) ... [2020-12-23 00:34:30,739 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-23 00:34:30,740 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-23 00:34:30,740 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-23 00:34:30,740 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-23 00:34:30,756 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:34:30" (1/1) ... [2020-12-23 00:34:30,757 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:34:30" (1/1) ... [2020-12-23 00:34:30,765 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:34:30" (1/1) ... [2020-12-23 00:34:30,765 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:34:30" (1/1) ... [2020-12-23 00:34:30,784 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:34:30" (1/1) ... [2020-12-23 00:34:30,794 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:34:30" (1/1) ... [2020-12-23 00:34:30,801 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:34:30" (1/1) ... [2020-12-23 00:34:30,804 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-23 00:34:30,805 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-23 00:34:30,805 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-23 00:34:30,805 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-23 00:34:30,806 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:34:30" (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 00:34:30,949 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-23 00:34:30,949 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-23 00:34:30,950 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-23 00:34:30,950 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-23 00:34:30,950 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-23 00:34:30,950 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-23 00:34:30,950 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-23 00:34:31,607 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-23 00:34:31,608 INFO L299 CfgBuilder]: Removed 10 assume(true) statements. [2020-12-23 00:34:31,615 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 12:34:31 BoogieIcfgContainer [2020-12-23 00:34:31,616 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-23 00:34:31,622 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-23 00:34:31,622 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-23 00:34:31,638 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-23 00:34:31,639 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.12 12:34:30" (1/3) ... [2020-12-23 00:34:31,648 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3bba0fbb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 12:34:31, skipping insertion in model container [2020-12-23 00:34:31,649 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:34:30" (2/3) ... [2020-12-23 00:34:31,650 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3bba0fbb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 12:34:31, skipping insertion in model container [2020-12-23 00:34:31,652 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 12:34:31" (3/3) ... [2020-12-23 00:34:31,664 INFO L111 eAbstractionObserver]: Analyzing ICFG pr2.c [2020-12-23 00:34:31,683 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-23 00:34:31,696 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-23 00:34:31,736 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-23 00:34:31,816 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-23 00:34:31,819 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-23 00:34:31,820 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-23 00:34:31,820 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-23 00:34:31,821 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-23 00:34:31,821 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-23 00:34:31,821 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-23 00:34:31,821 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-23 00:34:31,862 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2020-12-23 00:34:31,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-23 00:34:31,875 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:34:31,877 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:34:31,878 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:34:31,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:34:31,892 INFO L82 PathProgramCache]: Analyzing trace with hash -583465863, now seen corresponding path program 1 times [2020-12-23 00:34:31,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:34:31,914 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807858725] [2020-12-23 00:34:31,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:34:32,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:34:32,438 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 00:34:32,440 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807858725] [2020-12-23 00:34:32,444 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 00:34:32,445 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-23 00:34:32,446 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429591253] [2020-12-23 00:34:32,453 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-23 00:34:32,454 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:34:32,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-23 00:34:32,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-23 00:34:32,490 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 2 states. [2020-12-23 00:34:32,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:34:32,529 INFO L93 Difference]: Finished difference Result 43 states and 60 transitions. [2020-12-23 00:34:32,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-23 00:34:32,532 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 13 [2020-12-23 00:34:32,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:34:32,549 INFO L225 Difference]: With dead ends: 43 [2020-12-23 00:34:32,549 INFO L226 Difference]: Without dead ends: 19 [2020-12-23 00:34:32,555 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 00:34:32,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-12-23 00:34:32,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-12-23 00:34:32,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-12-23 00:34:32,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2020-12-23 00:34:32,618 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 13 [2020-12-23 00:34:32,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:34:32,619 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2020-12-23 00:34:32,620 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-23 00:34:32,620 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2020-12-23 00:34:32,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-23 00:34:32,621 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:34:32,621 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:34:32,622 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-23 00:34:32,622 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:34:32,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:34:32,624 INFO L82 PathProgramCache]: Analyzing trace with hash 96592507, now seen corresponding path program 1 times [2020-12-23 00:34:32,624 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:34:32,625 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156481644] [2020-12-23 00:34:32,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:34:32,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:34:32,862 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 00:34:32,862 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156481644] [2020-12-23 00:34:32,863 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 00:34:32,863 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-23 00:34:32,863 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548284611] [2020-12-23 00:34:32,865 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 00:34:32,865 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:34:32,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 00:34:32,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-23 00:34:32,867 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand 4 states. [2020-12-23 00:34:32,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:34:32,919 INFO L93 Difference]: Finished difference Result 28 states and 33 transitions. [2020-12-23 00:34:32,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 00:34:32,920 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2020-12-23 00:34:32,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:34:32,921 INFO L225 Difference]: With dead ends: 28 [2020-12-23 00:34:32,921 INFO L226 Difference]: Without dead ends: 26 [2020-12-23 00:34:32,922 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-23 00:34:32,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-12-23 00:34:32,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 21. [2020-12-23 00:34:32,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-12-23 00:34:32,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2020-12-23 00:34:32,928 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 13 [2020-12-23 00:34:32,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:34:32,928 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2020-12-23 00:34:32,928 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 00:34:32,929 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2020-12-23 00:34:32,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-23 00:34:32,929 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:34:32,930 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:34:32,930 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-23 00:34:32,930 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:34:32,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:34:32,932 INFO L82 PathProgramCache]: Analyzing trace with hash 96652089, now seen corresponding path program 1 times [2020-12-23 00:34:32,932 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:34:32,933 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120093217] [2020-12-23 00:34:32,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:34:32,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:34:33,163 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 00:34:33,165 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120093217] [2020-12-23 00:34:33,165 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 00:34:33,166 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-23 00:34:33,166 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866052240] [2020-12-23 00:34:33,167 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 00:34:33,168 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:34:33,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 00:34:33,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-23 00:34:33,170 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 5 states. [2020-12-23 00:34:33,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:34:33,283 INFO L93 Difference]: Finished difference Result 36 states and 44 transitions. [2020-12-23 00:34:33,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 00:34:33,285 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-12-23 00:34:33,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:34:33,286 INFO L225 Difference]: With dead ends: 36 [2020-12-23 00:34:33,287 INFO L226 Difference]: Without dead ends: 25 [2020-12-23 00:34:33,288 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 00:34:33,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-12-23 00:34:33,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 22. [2020-12-23 00:34:33,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-12-23 00:34:33,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2020-12-23 00:34:33,297 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 13 [2020-12-23 00:34:33,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:34:33,297 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2020-12-23 00:34:33,298 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 00:34:33,298 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2020-12-23 00:34:33,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-23 00:34:33,299 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:34:33,299 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:34:33,300 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-23 00:34:33,300 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:34:33,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:34:33,302 INFO L82 PathProgramCache]: Analyzing trace with hash 37256114, now seen corresponding path program 1 times [2020-12-23 00:34:33,303 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:34:33,303 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468057565] [2020-12-23 00:34:33,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:34:33,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:34:34,001 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 00:34:34,004 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468057565] [2020-12-23 00:34:34,005 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [163861130] [2020-12-23 00:34:34,006 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 00:34:34,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:34:34,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-23 00:34:34,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:34:34,371 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2020-12-23 00:34:34,373 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:34:34,387 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:34:34,392 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 00:34:34,393 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:19 [2020-12-23 00:34:34,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:34:34,458 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2020-12-23 00:34:34,464 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:34:34,472 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:34:34,476 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 00:34:34,477 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:24, output treesize:11 [2020-12-23 00:34:34,591 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 00:34:34,608 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 00:34:34,643 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 00:34:34,644 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:34:34,644 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 15 [2020-12-23 00:34:34,645 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963519812] [2020-12-23 00:34:34,645 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-23 00:34:34,646 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:34:34,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-23 00:34:34,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2020-12-23 00:34:34,647 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand 15 states. [2020-12-23 00:34:35,695 WARN L197 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 25 [2020-12-23 00:34:35,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:34:35,857 INFO L93 Difference]: Finished difference Result 103 states and 122 transitions. [2020-12-23 00:34:35,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-23 00:34:35,857 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 17 [2020-12-23 00:34:35,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:34:35,866 INFO L225 Difference]: With dead ends: 103 [2020-12-23 00:34:35,866 INFO L226 Difference]: Without dead ends: 93 [2020-12-23 00:34:35,868 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=220, Invalid=650, Unknown=0, NotChecked=0, Total=870 [2020-12-23 00:34:35,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-12-23 00:34:35,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 29. [2020-12-23 00:34:35,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-12-23 00:34:35,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 36 transitions. [2020-12-23 00:34:35,907 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 36 transitions. Word has length 17 [2020-12-23 00:34:35,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:34:35,909 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 36 transitions. [2020-12-23 00:34:35,909 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-23 00:34:35,909 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 36 transitions. [2020-12-23 00:34:35,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-23 00:34:35,914 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:34:35,915 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:34:36,116 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:34:36,117 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:34:36,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:34:36,120 INFO L82 PathProgramCache]: Analyzing trace with hash -355770896, now seen corresponding path program 1 times [2020-12-23 00:34:36,120 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:34:36,121 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303527623] [2020-12-23 00:34:36,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:34:36,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:34:36,272 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:34:36,273 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303527623] [2020-12-23 00:34:36,274 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 00:34:36,274 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-23 00:34:36,274 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759109094] [2020-12-23 00:34:36,275 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 00:34:36,275 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:34:36,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 00:34:36,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-23 00:34:36,277 INFO L87 Difference]: Start difference. First operand 29 states and 36 transitions. Second operand 4 states. [2020-12-23 00:34:36,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:34:36,359 INFO L93 Difference]: Finished difference Result 54 states and 66 transitions. [2020-12-23 00:34:36,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 00:34:36,360 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2020-12-23 00:34:36,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:34:36,361 INFO L225 Difference]: With dead ends: 54 [2020-12-23 00:34:36,361 INFO L226 Difference]: Without dead ends: 39 [2020-12-23 00:34:36,363 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-23 00:34:36,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-12-23 00:34:36,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 29. [2020-12-23 00:34:36,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-12-23 00:34:36,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 35 transitions. [2020-12-23 00:34:36,373 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 35 transitions. Word has length 17 [2020-12-23 00:34:36,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:34:36,374 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 35 transitions. [2020-12-23 00:34:36,374 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 00:34:36,374 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 35 transitions. [2020-12-23 00:34:36,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-23 00:34:36,375 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:34:36,375 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:34:36,376 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-23 00:34:36,376 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:34:36,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:34:36,377 INFO L82 PathProgramCache]: Analyzing trace with hash 324287474, now seen corresponding path program 1 times [2020-12-23 00:34:36,378 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:34:36,378 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30501340] [2020-12-23 00:34:36,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:34:36,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:34:36,651 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 00:34:36,652 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30501340] [2020-12-23 00:34:36,653 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [335651449] [2020-12-23 00:34:36,654 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 00:34:36,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:34:36,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-23 00:34:36,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:34:36,767 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2020-12-23 00:34:36,769 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:34:36,780 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:34:36,783 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:34:36,784 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:23 [2020-12-23 00:34:36,822 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 44 [2020-12-23 00:34:36,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:34:36,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:34:36,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:34:36,841 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 36 [2020-12-23 00:34:36,846 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-23 00:34:36,856 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:34:36,859 INFO L547 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:34:36,909 INFO L625 ElimStorePlain]: treesize reduction 5, result has 87.8 percent of original size [2020-12-23 00:34:36,911 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:34:36,912 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:57, output treesize:36 [2020-12-23 00:34:37,076 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 00:34:37,078 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:34:37,078 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2020-12-23 00:34:37,078 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729346153] [2020-12-23 00:34:37,079 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-23 00:34:37,080 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:34:37,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-23 00:34:37,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2020-12-23 00:34:37,081 INFO L87 Difference]: Start difference. First operand 29 states and 35 transitions. Second operand 12 states. [2020-12-23 00:34:37,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:34:37,993 INFO L93 Difference]: Finished difference Result 83 states and 100 transitions. [2020-12-23 00:34:37,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-23 00:34:37,995 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 17 [2020-12-23 00:34:37,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:34:37,997 INFO L225 Difference]: With dead ends: 83 [2020-12-23 00:34:37,997 INFO L226 Difference]: Without dead ends: 81 [2020-12-23 00:34:37,999 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=195, Invalid=507, Unknown=0, NotChecked=0, Total=702 [2020-12-23 00:34:38,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-12-23 00:34:38,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 43. [2020-12-23 00:34:38,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-12-23 00:34:38,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 54 transitions. [2020-12-23 00:34:38,013 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 54 transitions. Word has length 17 [2020-12-23 00:34:38,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:34:38,013 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 54 transitions. [2020-12-23 00:34:38,013 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-23 00:34:38,014 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 54 transitions. [2020-12-23 00:34:38,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-12-23 00:34:38,014 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:34:38,015 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 00:34:38,230 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:34:38,232 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:34:38,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:34:38,234 INFO L82 PathProgramCache]: Analyzing trace with hash -2078603285, now seen corresponding path program 1 times [2020-12-23 00:34:38,235 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:34:38,235 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824025103] [2020-12-23 00:34:38,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:34:38,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:34:38,324 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:34:38,325 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824025103] [2020-12-23 00:34:38,325 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 00:34:38,326 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 00:34:38,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012238793] [2020-12-23 00:34:38,327 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 00:34:38,327 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:34:38,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 00:34:38,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 00:34:38,329 INFO L87 Difference]: Start difference. First operand 43 states and 54 transitions. Second operand 3 states. [2020-12-23 00:34:38,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:34:38,362 INFO L93 Difference]: Finished difference Result 68 states and 83 transitions. [2020-12-23 00:34:38,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 00:34:38,363 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-12-23 00:34:38,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:34:38,364 INFO L225 Difference]: With dead ends: 68 [2020-12-23 00:34:38,364 INFO L226 Difference]: Without dead ends: 53 [2020-12-23 00:34:38,365 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 00:34:38,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-12-23 00:34:38,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 43. [2020-12-23 00:34:38,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-12-23 00:34:38,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 52 transitions. [2020-12-23 00:34:38,379 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 52 transitions. Word has length 21 [2020-12-23 00:34:38,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:34:38,379 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 52 transitions. [2020-12-23 00:34:38,380 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 00:34:38,380 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 52 transitions. [2020-12-23 00:34:38,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-12-23 00:34:38,381 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:34:38,381 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:34:38,382 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-23 00:34:38,384 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:34:38,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:34:38,386 INFO L82 PathProgramCache]: Analyzing trace with hash 1011467757, now seen corresponding path program 1 times [2020-12-23 00:34:38,387 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:34:38,390 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199286056] [2020-12-23 00:34:38,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:34:38,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:34:38,502 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:34:38,504 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199286056] [2020-12-23 00:34:38,504 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 00:34:38,504 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 00:34:38,505 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120699368] [2020-12-23 00:34:38,505 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 00:34:38,506 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:34:38,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 00:34:38,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 00:34:38,508 INFO L87 Difference]: Start difference. First operand 43 states and 52 transitions. Second operand 3 states. [2020-12-23 00:34:38,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:34:38,573 INFO L93 Difference]: Finished difference Result 63 states and 74 transitions. [2020-12-23 00:34:38,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 00:34:38,575 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-12-23 00:34:38,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:34:38,581 INFO L225 Difference]: With dead ends: 63 [2020-12-23 00:34:38,582 INFO L226 Difference]: Without dead ends: 48 [2020-12-23 00:34:38,583 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 00:34:38,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-12-23 00:34:38,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 38. [2020-12-23 00:34:38,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-12-23 00:34:38,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 45 transitions. [2020-12-23 00:34:38,624 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 45 transitions. Word has length 21 [2020-12-23 00:34:38,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:34:38,624 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 45 transitions. [2020-12-23 00:34:38,625 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 00:34:38,625 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 45 transitions. [2020-12-23 00:34:38,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-12-23 00:34:38,626 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:34:38,626 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:34:38,627 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-23 00:34:38,630 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:34:38,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:34:38,632 INFO L82 PathProgramCache]: Analyzing trace with hash 2125491333, now seen corresponding path program 1 times [2020-12-23 00:34:38,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:34:38,634 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951741058] [2020-12-23 00:34:38,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:34:38,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:34:38,982 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:34:38,983 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951741058] [2020-12-23 00:34:38,983 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1504602170] [2020-12-23 00:34:38,983 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 00:34:39,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:34:39,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-23 00:34:39,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:34:39,161 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2020-12-23 00:34:39,163 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:34:39,169 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:34:39,172 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 00:34:39,173 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:17, output treesize:9 [2020-12-23 00:34:39,282 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 00:34:39,290 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 00:34:39,322 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:34:39,323 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:34:39,323 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 14 [2020-12-23 00:34:39,324 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793944435] [2020-12-23 00:34:39,325 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-23 00:34:39,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:34:39,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-23 00:34:39,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2020-12-23 00:34:39,326 INFO L87 Difference]: Start difference. First operand 38 states and 45 transitions. Second operand 14 states. [2020-12-23 00:34:39,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:34:39,706 INFO L93 Difference]: Finished difference Result 94 states and 109 transitions. [2020-12-23 00:34:39,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-23 00:34:39,706 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 23 [2020-12-23 00:34:39,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:34:39,710 INFO L225 Difference]: With dead ends: 94 [2020-12-23 00:34:39,710 INFO L226 Difference]: Without dead ends: 77 [2020-12-23 00:34:39,712 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=107, Invalid=313, Unknown=0, NotChecked=0, Total=420 [2020-12-23 00:34:39,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-12-23 00:34:39,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 50. [2020-12-23 00:34:39,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-12-23 00:34:39,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 59 transitions. [2020-12-23 00:34:39,736 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 59 transitions. Word has length 23 [2020-12-23 00:34:39,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:34:39,738 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 59 transitions. [2020-12-23 00:34:39,738 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-23 00:34:39,739 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 59 transitions. [2020-12-23 00:34:39,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-12-23 00:34:39,740 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:34:39,740 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:34:39,953 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:34:39,954 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:34:39,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:34:39,956 INFO L82 PathProgramCache]: Analyzing trace with hash 845627655, now seen corresponding path program 1 times [2020-12-23 00:34:39,956 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:34:39,957 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141113673] [2020-12-23 00:34:39,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:34:39,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:34:40,130 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:34:40,130 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141113673] [2020-12-23 00:34:40,131 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1903411744] [2020-12-23 00:34:40,131 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 00:34:40,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:34:40,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-23 00:34:40,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:34:40,225 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 00:34:40,226 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:34:40,228 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:34:40,228 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:34:40,228 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:9 [2020-12-23 00:34:40,319 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:34:40,320 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:34:40,320 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 15 [2020-12-23 00:34:40,320 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829858452] [2020-12-23 00:34:40,321 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-23 00:34:40,321 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:34:40,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-23 00:34:40,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2020-12-23 00:34:40,322 INFO L87 Difference]: Start difference. First operand 50 states and 59 transitions. Second operand 15 states. [2020-12-23 00:34:40,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:34:40,798 INFO L93 Difference]: Finished difference Result 107 states and 123 transitions. [2020-12-23 00:34:40,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-23 00:34:40,798 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 23 [2020-12-23 00:34:40,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:34:40,800 INFO L225 Difference]: With dead ends: 107 [2020-12-23 00:34:40,800 INFO L226 Difference]: Without dead ends: 105 [2020-12-23 00:34:40,801 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=250, Invalid=742, Unknown=0, NotChecked=0, Total=992 [2020-12-23 00:34:40,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-12-23 00:34:40,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 57. [2020-12-23 00:34:40,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-12-23 00:34:40,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 68 transitions. [2020-12-23 00:34:40,811 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 68 transitions. Word has length 23 [2020-12-23 00:34:40,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:34:40,812 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 68 transitions. [2020-12-23 00:34:40,812 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-23 00:34:40,812 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 68 transitions. [2020-12-23 00:34:40,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-12-23 00:34:40,813 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:34:40,813 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:34:41,026 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:34:41,027 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:34:41,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:34:41,028 INFO L82 PathProgramCache]: Analyzing trace with hash 1664572736, now seen corresponding path program 1 times [2020-12-23 00:34:41,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:34:41,029 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058897483] [2020-12-23 00:34:41,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:34:41,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:34:41,060 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-23 00:34:41,061 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058897483] [2020-12-23 00:34:41,061 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 00:34:41,061 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 00:34:41,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234497912] [2020-12-23 00:34:41,062 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 00:34:41,065 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:34:41,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 00:34:41,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 00:34:41,066 INFO L87 Difference]: Start difference. First operand 57 states and 68 transitions. Second operand 3 states. [2020-12-23 00:34:41,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:34:41,093 INFO L93 Difference]: Finished difference Result 80 states and 93 transitions. [2020-12-23 00:34:41,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 00:34:41,093 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-12-23 00:34:41,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:34:41,095 INFO L225 Difference]: With dead ends: 80 [2020-12-23 00:34:41,095 INFO L226 Difference]: Without dead ends: 63 [2020-12-23 00:34:41,096 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 00:34:41,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-12-23 00:34:41,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 52. [2020-12-23 00:34:41,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-12-23 00:34:41,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 60 transitions. [2020-12-23 00:34:41,110 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 60 transitions. Word has length 27 [2020-12-23 00:34:41,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:34:41,110 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 60 transitions. [2020-12-23 00:34:41,111 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 00:34:41,111 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 60 transitions. [2020-12-23 00:34:41,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-12-23 00:34:41,119 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:34:41,120 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:34:41,120 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-23 00:34:41,120 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:34:41,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:34:41,123 INFO L82 PathProgramCache]: Analyzing trace with hash -147377384, now seen corresponding path program 2 times [2020-12-23 00:34:41,124 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:34:41,125 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714128216] [2020-12-23 00:34:41,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:34:41,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:34:41,473 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:34:41,473 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714128216] [2020-12-23 00:34:41,474 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [634561082] [2020-12-23 00:34:41,474 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:34:41,542 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 00:34:41,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:34:41,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-23 00:34:41,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:34:41,797 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 14 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:34:41,798 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:34:41,798 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2020-12-23 00:34:41,798 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900494428] [2020-12-23 00:34:41,799 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-23 00:34:41,799 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:34:41,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-23 00:34:41,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2020-12-23 00:34:41,800 INFO L87 Difference]: Start difference. First operand 52 states and 60 transitions. Second operand 17 states. [2020-12-23 00:34:42,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:34:42,087 INFO L93 Difference]: Finished difference Result 108 states and 122 transitions. [2020-12-23 00:34:42,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-23 00:34:42,087 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 29 [2020-12-23 00:34:42,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:34:42,088 INFO L225 Difference]: With dead ends: 108 [2020-12-23 00:34:42,088 INFO L226 Difference]: Without dead ends: 72 [2020-12-23 00:34:42,089 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=127, Invalid=293, Unknown=0, NotChecked=0, Total=420 [2020-12-23 00:34:42,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-12-23 00:34:42,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 59. [2020-12-23 00:34:42,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-12-23 00:34:42,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 67 transitions. [2020-12-23 00:34:42,096 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 67 transitions. Word has length 29 [2020-12-23 00:34:42,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:34:42,097 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 67 transitions. [2020-12-23 00:34:42,097 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-23 00:34:42,097 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 67 transitions. [2020-12-23 00:34:42,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-12-23 00:34:42,098 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:34:42,098 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:34:42,312 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-12-23 00:34:42,313 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:34:42,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:34:42,314 INFO L82 PathProgramCache]: Analyzing trace with hash 1385615761, now seen corresponding path program 3 times [2020-12-23 00:34:42,314 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:34:42,315 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672242003] [2020-12-23 00:34:42,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:34:42,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:34:42,710 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:34:42,711 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672242003] [2020-12-23 00:34:42,712 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1023855709] [2020-12-23 00:34:42,712 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:34:42,813 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-23 00:34:42,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:34:42,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-23 00:34:42,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:34:42,942 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2020-12-23 00:34:42,943 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:34:42,956 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:34:42,959 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 00:34:42,960 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:19 [2020-12-23 00:34:43,027 INFO L348 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2020-12-23 00:34:43,028 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 00:34:43,030 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:34:43,043 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:34:43,045 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 00:34:43,046 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:28 [2020-12-23 00:34:43,282 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 00:34:43,288 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 00:34:43,291 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 00:34:43,307 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:34:43,308 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:34:43,308 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 21 [2020-12-23 00:34:43,309 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144768785] [2020-12-23 00:34:43,309 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-23 00:34:43,310 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:34:43,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-23 00:34:43,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2020-12-23 00:34:43,311 INFO L87 Difference]: Start difference. First operand 59 states and 67 transitions. Second operand 21 states. [2020-12-23 00:34:44,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:34:44,570 INFO L93 Difference]: Finished difference Result 105 states and 116 transitions. [2020-12-23 00:34:44,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-23 00:34:44,570 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 33 [2020-12-23 00:34:44,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:34:44,571 INFO L225 Difference]: With dead ends: 105 [2020-12-23 00:34:44,571 INFO L226 Difference]: Without dead ends: 95 [2020-12-23 00:34:44,572 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=214, Invalid=976, Unknown=0, NotChecked=0, Total=1190 [2020-12-23 00:34:44,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-12-23 00:34:44,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 65. [2020-12-23 00:34:44,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-12-23 00:34:44,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 73 transitions. [2020-12-23 00:34:44,581 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 73 transitions. Word has length 33 [2020-12-23 00:34:44,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:34:44,581 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 73 transitions. [2020-12-23 00:34:44,581 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-23 00:34:44,581 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 73 transitions. [2020-12-23 00:34:44,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-12-23 00:34:44,582 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:34:44,582 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:34:44,797 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:34:44,798 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:34:44,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:34:44,799 INFO L82 PathProgramCache]: Analyzing trace with hash 1948866197, now seen corresponding path program 2 times [2020-12-23 00:34:44,799 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:34:44,800 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261056188] [2020-12-23 00:34:44,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:34:44,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:34:44,943 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:34:44,943 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261056188] [2020-12-23 00:34:44,943 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [828969298] [2020-12-23 00:34:44,944 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:34:44,999 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 00:34:45,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:34:45,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-23 00:34:45,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:34:45,044 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2020-12-23 00:34:45,044 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:34:45,052 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:34:45,055 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 00:34:45,055 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:19 [2020-12-23 00:34:45,079 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 32 [2020-12-23 00:34:45,092 INFO L348 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2020-12-23 00:34:45,093 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 61 [2020-12-23 00:34:45,097 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-23 00:34:45,103 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:34:45,104 INFO L547 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:34:45,113 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:34:45,115 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 00:34:45,116 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:43, output treesize:31 [2020-12-23 00:34:45,407 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 00:34:45,414 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 00:34:45,417 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 00:34:45,419 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-23 00:34:45,436 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:34:45,437 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:34:45,437 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2020-12-23 00:34:45,438 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134549468] [2020-12-23 00:34:45,439 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-23 00:34:45,439 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:34:45,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-23 00:34:45,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2020-12-23 00:34:45,441 INFO L87 Difference]: Start difference. First operand 65 states and 73 transitions. Second operand 15 states. [2020-12-23 00:34:46,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:34:46,317 INFO L93 Difference]: Finished difference Result 137 states and 151 transitions. [2020-12-23 00:34:46,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-12-23 00:34:46,317 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 33 [2020-12-23 00:34:46,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:34:46,318 INFO L225 Difference]: With dead ends: 137 [2020-12-23 00:34:46,319 INFO L226 Difference]: Without dead ends: 127 [2020-12-23 00:34:46,320 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=152, Invalid=660, Unknown=0, NotChecked=0, Total=812 [2020-12-23 00:34:46,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-12-23 00:34:46,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 71. [2020-12-23 00:34:46,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-12-23 00:34:46,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 80 transitions. [2020-12-23 00:34:46,331 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 80 transitions. Word has length 33 [2020-12-23 00:34:46,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:34:46,331 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 80 transitions. [2020-12-23 00:34:46,331 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-23 00:34:46,331 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 80 transitions. [2020-12-23 00:34:46,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-12-23 00:34:46,332 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:34:46,332 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:34:46,546 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-12-23 00:34:46,547 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:34:46,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:34:46,548 INFO L82 PathProgramCache]: Analyzing trace with hash -2065206767, now seen corresponding path program 1 times [2020-12-23 00:34:46,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:34:46,549 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729196208] [2020-12-23 00:34:46,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:34:46,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:34:46,721 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:34:46,721 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729196208] [2020-12-23 00:34:46,723 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1461997940] [2020-12-23 00:34:46,724 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 00:34:46,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:34:46,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-23 00:34:46,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:34:46,818 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2020-12-23 00:34:46,819 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:34:46,826 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:34:46,827 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:34:46,827 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:19 [2020-12-23 00:34:46,848 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 32 [2020-12-23 00:34:46,863 INFO L348 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2020-12-23 00:34:46,864 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 57 [2020-12-23 00:34:46,865 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-23 00:34:46,871 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:34:46,872 INFO L547 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:34:46,881 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:34:46,883 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 00:34:46,884 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:43, output treesize:31 [2020-12-23 00:34:47,142 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 00:34:47,145 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-23 00:34:47,177 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:34:47,177 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:34:47,177 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2020-12-23 00:34:47,178 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041888800] [2020-12-23 00:34:47,178 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-23 00:34:47,178 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:34:47,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-23 00:34:47,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2020-12-23 00:34:47,179 INFO L87 Difference]: Start difference. First operand 71 states and 80 transitions. Second operand 16 states. [2020-12-23 00:34:48,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:34:48,217 INFO L93 Difference]: Finished difference Result 154 states and 173 transitions. [2020-12-23 00:34:48,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-12-23 00:34:48,218 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 33 [2020-12-23 00:34:48,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:34:48,220 INFO L225 Difference]: With dead ends: 154 [2020-12-23 00:34:48,220 INFO L226 Difference]: Without dead ends: 152 [2020-12-23 00:34:48,221 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 370 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=300, Invalid=1182, Unknown=0, NotChecked=0, Total=1482 [2020-12-23 00:34:48,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2020-12-23 00:34:48,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 83. [2020-12-23 00:34:48,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-12-23 00:34:48,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 94 transitions. [2020-12-23 00:34:48,231 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 94 transitions. Word has length 33 [2020-12-23 00:34:48,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:34:48,232 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 94 transitions. [2020-12-23 00:34:48,232 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-23 00:34:48,232 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 94 transitions. [2020-12-23 00:34:48,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-12-23 00:34:48,233 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:34:48,233 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:34:48,440 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-12-23 00:34:48,443 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:34:48,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:34:48,444 INFO L82 PathProgramCache]: Analyzing trace with hash 382246692, now seen corresponding path program 4 times [2020-12-23 00:34:48,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:34:48,445 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261942290] [2020-12-23 00:34:48,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:34:48,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:34:48,836 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:34:48,837 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261942290] [2020-12-23 00:34:48,837 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1405761814] [2020-12-23 00:34:48,837 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:34:48,901 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 00:34:48,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:34:48,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-23 00:34:48,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:34:48,971 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 00:34:48,973 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:34:48,977 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:34:48,979 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 00:34:48,979 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:17, output treesize:9 [2020-12-23 00:34:49,104 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 00:34:49,107 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 00:34:49,145 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:34:49,145 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:34:49,146 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2020-12-23 00:34:49,146 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075696473] [2020-12-23 00:34:49,146 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-23 00:34:49,147 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:34:49,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-23 00:34:49,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2020-12-23 00:34:49,148 INFO L87 Difference]: Start difference. First operand 83 states and 94 transitions. Second operand 21 states. [2020-12-23 00:34:49,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:34:49,909 INFO L93 Difference]: Finished difference Result 143 states and 158 transitions. [2020-12-23 00:34:49,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-23 00:34:49,910 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 39 [2020-12-23 00:34:49,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:34:49,911 INFO L225 Difference]: With dead ends: 143 [2020-12-23 00:34:49,911 INFO L226 Difference]: Without dead ends: 133 [2020-12-23 00:34:49,913 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=183, Invalid=809, Unknown=0, NotChecked=0, Total=992 [2020-12-23 00:34:49,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-12-23 00:34:49,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 89. [2020-12-23 00:34:49,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-12-23 00:34:49,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 100 transitions. [2020-12-23 00:34:49,925 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 100 transitions. Word has length 39 [2020-12-23 00:34:49,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:34:49,927 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 100 transitions. [2020-12-23 00:34:49,927 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-23 00:34:49,927 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 100 transitions. [2020-12-23 00:34:49,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-12-23 00:34:49,930 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:34:49,930 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:34:50,143 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-12-23 00:34:50,144 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:34:50,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:34:50,145 INFO L82 PathProgramCache]: Analyzing trace with hash -1287892696, now seen corresponding path program 3 times [2020-12-23 00:34:50,146 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:34:50,146 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724137958] [2020-12-23 00:34:50,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:34:50,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:34:50,484 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:34:50,485 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724137958] [2020-12-23 00:34:50,485 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [775905940] [2020-12-23 00:34:50,485 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:34:50,581 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-12-23 00:34:50,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:34:50,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 24 conjunts are in the unsatisfiable core [2020-12-23 00:34:50,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:34:50,629 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 00:34:50,630 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:34:50,633 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:34:50,633 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:34:50,634 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:9 [2020-12-23 00:34:50,775 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:34:50,776 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:34:50,776 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 20 [2020-12-23 00:34:50,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005928818] [2020-12-23 00:34:50,777 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-23 00:34:50,777 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:34:50,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-23 00:34:50,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2020-12-23 00:34:50,780 INFO L87 Difference]: Start difference. First operand 89 states and 100 transitions. Second operand 20 states. [2020-12-23 00:34:51,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:34:51,787 INFO L93 Difference]: Finished difference Result 180 states and 200 transitions. [2020-12-23 00:34:51,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-12-23 00:34:51,788 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 39 [2020-12-23 00:34:51,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:34:51,790 INFO L225 Difference]: With dead ends: 180 [2020-12-23 00:34:51,790 INFO L226 Difference]: Without dead ends: 178 [2020-12-23 00:34:51,792 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 527 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=399, Invalid=1581, Unknown=0, NotChecked=0, Total=1980 [2020-12-23 00:34:51,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2020-12-23 00:34:51,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 95. [2020-12-23 00:34:51,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-12-23 00:34:51,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 106 transitions. [2020-12-23 00:34:51,806 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 106 transitions. Word has length 39 [2020-12-23 00:34:51,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:34:51,806 INFO L481 AbstractCegarLoop]: Abstraction has 95 states and 106 transitions. [2020-12-23 00:34:51,806 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-23 00:34:51,806 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 106 transitions. [2020-12-23 00:34:51,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-12-23 00:34:51,807 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:34:51,807 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:34:52,007 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-12-23 00:34:52,011 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:34:52,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:34:52,012 INFO L82 PathProgramCache]: Analyzing trace with hash -270486921, now seen corresponding path program 5 times [2020-12-23 00:34:52,012 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:34:52,012 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537328246] [2020-12-23 00:34:52,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:34:52,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:34:52,509 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 33 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:34:52,510 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537328246] [2020-12-23 00:34:52,511 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [605200933] [2020-12-23 00:34:52,511 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:34:52,595 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-12-23 00:34:52,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:34:52,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-23 00:34:52,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:34:53,104 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 52 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:34:53,105 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:34:53,105 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2020-12-23 00:34:53,105 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478191044] [2020-12-23 00:34:53,106 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-12-23 00:34:53,106 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:34:53,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-12-23 00:34:53,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=374, Unknown=0, NotChecked=0, Total=506 [2020-12-23 00:34:53,107 INFO L87 Difference]: Start difference. First operand 95 states and 106 transitions. Second operand 23 states. [2020-12-23 00:34:53,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:34:53,568 INFO L93 Difference]: Finished difference Result 188 states and 208 transitions. [2020-12-23 00:34:53,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-23 00:34:53,570 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 45 [2020-12-23 00:34:53,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:34:53,571 INFO L225 Difference]: With dead ends: 188 [2020-12-23 00:34:53,572 INFO L226 Difference]: Without dead ends: 116 [2020-12-23 00:34:53,573 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=222, Invalid=590, Unknown=0, NotChecked=0, Total=812 [2020-12-23 00:34:53,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-12-23 00:34:53,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 107. [2020-12-23 00:34:53,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-12-23 00:34:53,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 118 transitions. [2020-12-23 00:34:53,586 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 118 transitions. Word has length 45 [2020-12-23 00:34:53,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:34:53,586 INFO L481 AbstractCegarLoop]: Abstraction has 107 states and 118 transitions. [2020-12-23 00:34:53,586 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-12-23 00:34:53,587 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 118 transitions. [2020-12-23 00:34:53,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-12-23 00:34:53,587 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:34:53,587 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:34:53,788 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-23 00:34:53,789 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:34:53,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:34:53,790 INFO L82 PathProgramCache]: Analyzing trace with hash -1534181648, now seen corresponding path program 6 times [2020-12-23 00:34:53,790 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:34:53,790 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841566532] [2020-12-23 00:34:53,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:34:53,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:34:54,216 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 8 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:34:54,217 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841566532] [2020-12-23 00:34:54,218 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [827875306] [2020-12-23 00:34:54,218 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:34:54,307 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-12-23 00:34:54,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:34:54,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 27 conjunts are in the unsatisfiable core [2020-12-23 00:34:54,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:34:54,405 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2020-12-23 00:34:54,406 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:34:54,417 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:34:54,418 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 00:34:54,419 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:19 [2020-12-23 00:34:54,475 INFO L348 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2020-12-23 00:34:54,475 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 00:34:54,476 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:34:54,484 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:34:54,486 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:34:54,487 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:22 [2020-12-23 00:34:54,834 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 00:34:54,836 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 00:34:54,914 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 8 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:34:54,915 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:34:54,915 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 26 [2020-12-23 00:34:54,915 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141764604] [2020-12-23 00:34:54,915 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-12-23 00:34:54,916 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:34:54,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-12-23 00:34:54,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=574, Unknown=0, NotChecked=0, Total=650 [2020-12-23 00:34:54,917 INFO L87 Difference]: Start difference. First operand 107 states and 118 transitions. Second operand 26 states. [2020-12-23 00:34:56,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:34:56,812 INFO L93 Difference]: Finished difference Result 171 states and 187 transitions. [2020-12-23 00:34:56,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-12-23 00:34:56,812 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 49 [2020-12-23 00:34:56,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:34:56,813 INFO L225 Difference]: With dead ends: 171 [2020-12-23 00:34:56,814 INFO L226 Difference]: Without dead ends: 161 [2020-12-23 00:34:56,815 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 410 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=280, Invalid=1882, Unknown=0, NotChecked=0, Total=2162 [2020-12-23 00:34:56,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-12-23 00:34:56,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 113. [2020-12-23 00:34:56,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-12-23 00:34:56,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 124 transitions. [2020-12-23 00:34:56,832 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 124 transitions. Word has length 49 [2020-12-23 00:34:56,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:34:56,832 INFO L481 AbstractCegarLoop]: Abstraction has 113 states and 124 transitions. [2020-12-23 00:34:56,832 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-12-23 00:34:56,832 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 124 transitions. [2020-12-23 00:34:56,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-12-23 00:34:56,833 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:34:56,833 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:34:57,047 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:34:57,048 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:34:57,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:34:57,050 INFO L82 PathProgramCache]: Analyzing trace with hash -523389962, now seen corresponding path program 4 times [2020-12-23 00:34:57,050 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:34:57,051 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132581206] [2020-12-23 00:34:57,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:34:57,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:34:57,280 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 8 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:34:57,281 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132581206] [2020-12-23 00:34:57,281 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [289753470] [2020-12-23 00:34:57,281 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:34:57,346 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 00:34:57,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:34:57,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 22 conjunts are in the unsatisfiable core [2020-12-23 00:34:57,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:34:57,382 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2020-12-23 00:34:57,383 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:34:57,392 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:34:57,393 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 00:34:57,394 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:19 [2020-12-23 00:34:57,415 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 32 [2020-12-23 00:34:57,431 INFO L348 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2020-12-23 00:34:57,431 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 61 [2020-12-23 00:34:57,433 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-23 00:34:57,441 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:34:57,441 INFO L547 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:34:57,453 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:34:57,455 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 00:34:57,455 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:43, output treesize:31 [2020-12-23 00:34:57,866 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 00:34:57,869 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 00:34:57,872 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 00:34:57,873 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-23 00:34:57,902 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 8 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:34:57,902 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:34:57,903 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 20 [2020-12-23 00:34:57,903 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954045212] [2020-12-23 00:34:57,903 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-23 00:34:57,903 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:34:57,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-23 00:34:57,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2020-12-23 00:34:57,904 INFO L87 Difference]: Start difference. First operand 113 states and 124 transitions. Second operand 20 states. [2020-12-23 00:34:59,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:34:59,806 INFO L93 Difference]: Finished difference Result 208 states and 228 transitions. [2020-12-23 00:34:59,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-12-23 00:34:59,806 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 49 [2020-12-23 00:34:59,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:34:59,808 INFO L225 Difference]: With dead ends: 208 [2020-12-23 00:34:59,808 INFO L226 Difference]: Without dead ends: 198 [2020-12-23 00:34:59,809 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 559 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=270, Invalid=1892, Unknown=0, NotChecked=0, Total=2162 [2020-12-23 00:34:59,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2020-12-23 00:34:59,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 119. [2020-12-23 00:34:59,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-12-23 00:34:59,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 131 transitions. [2020-12-23 00:34:59,827 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 131 transitions. Word has length 49 [2020-12-23 00:34:59,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:34:59,827 INFO L481 AbstractCegarLoop]: Abstraction has 119 states and 131 transitions. [2020-12-23 00:34:59,828 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-23 00:34:59,828 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 131 transitions. [2020-12-23 00:34:59,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-12-23 00:34:59,828 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:34:59,829 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:35:00,043 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19 [2020-12-23 00:35:00,044 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:35:00,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:35:00,045 INFO L82 PathProgramCache]: Analyzing trace with hash 746381232, now seen corresponding path program 2 times [2020-12-23 00:35:00,046 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:35:00,046 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025262655] [2020-12-23 00:35:00,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:35:00,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:35:00,255 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:35:00,256 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025262655] [2020-12-23 00:35:00,256 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [639923455] [2020-12-23 00:35:00,256 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:35:00,321 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 00:35:00,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:35:00,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 35 conjunts are in the unsatisfiable core [2020-12-23 00:35:00,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:35:00,353 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2020-12-23 00:35:00,354 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:35:00,362 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:35:00,363 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:35:00,363 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:19 [2020-12-23 00:35:00,382 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 32 [2020-12-23 00:35:00,398 INFO L348 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2020-12-23 00:35:00,399 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 57 [2020-12-23 00:35:00,402 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-23 00:35:00,407 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:35:00,409 INFO L547 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:35:00,420 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:35:00,421 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 00:35:00,422 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:43, output treesize:31 [2020-12-23 00:35:00,983 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 00:35:00,985 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-23 00:35:01,036 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:35:01,037 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:35:01,037 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 23 [2020-12-23 00:35:01,037 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757413372] [2020-12-23 00:35:01,040 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-12-23 00:35:01,041 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:35:01,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-12-23 00:35:01,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2020-12-23 00:35:01,042 INFO L87 Difference]: Start difference. First operand 119 states and 131 transitions. Second operand 23 states. [2020-12-23 00:35:03,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:35:03,332 INFO L93 Difference]: Finished difference Result 240 states and 267 transitions. [2020-12-23 00:35:03,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2020-12-23 00:35:03,334 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 49 [2020-12-23 00:35:03,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:35:03,336 INFO L225 Difference]: With dead ends: 240 [2020-12-23 00:35:03,337 INFO L226 Difference]: Without dead ends: 238 [2020-12-23 00:35:03,339 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 39 SyntacticMatches, 3 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1114 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=514, Invalid=3268, Unknown=0, NotChecked=0, Total=3782 [2020-12-23 00:35:03,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2020-12-23 00:35:03,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 131. [2020-12-23 00:35:03,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-12-23 00:35:03,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 145 transitions. [2020-12-23 00:35:03,362 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 145 transitions. Word has length 49 [2020-12-23 00:35:03,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:35:03,362 INFO L481 AbstractCegarLoop]: Abstraction has 131 states and 145 transitions. [2020-12-23 00:35:03,363 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-12-23 00:35:03,363 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 145 transitions. [2020-12-23 00:35:03,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-12-23 00:35:03,364 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:35:03,364 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:35:03,579 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:35:03,580 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:35:03,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:35:03,582 INFO L82 PathProgramCache]: Analyzing trace with hash 2083146051, now seen corresponding path program 7 times [2020-12-23 00:35:03,582 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:35:03,582 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719229436] [2020-12-23 00:35:03,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:35:03,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:35:04,047 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 10 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:35:04,048 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719229436] [2020-12-23 00:35:04,048 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [522180818] [2020-12-23 00:35:04,049 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:35:04,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:35:04,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 23 conjunts are in the unsatisfiable core [2020-12-23 00:35:04,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:35:04,342 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 00:35:04,344 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:35:04,353 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:35:04,355 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:35:04,355 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:17, output treesize:9 [2020-12-23 00:35:04,744 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 00:35:04,747 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 00:35:04,779 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 10 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:35:04,779 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:35:04,780 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 27 [2020-12-23 00:35:04,780 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551969978] [2020-12-23 00:35:04,781 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-12-23 00:35:04,781 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:35:04,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-12-23 00:35:04,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=625, Unknown=0, NotChecked=0, Total=702 [2020-12-23 00:35:04,783 INFO L87 Difference]: Start difference. First operand 131 states and 145 transitions. Second operand 27 states. [2020-12-23 00:35:07,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:35:07,357 INFO L93 Difference]: Finished difference Result 208 states and 228 transitions. [2020-12-23 00:35:07,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-12-23 00:35:07,362 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 55 [2020-12-23 00:35:07,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:35:07,363 INFO L225 Difference]: With dead ends: 208 [2020-12-23 00:35:07,363 INFO L226 Difference]: Without dead ends: 198 [2020-12-23 00:35:07,365 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 508 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=307, Invalid=2143, Unknown=0, NotChecked=0, Total=2450 [2020-12-23 00:35:07,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2020-12-23 00:35:07,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 137. [2020-12-23 00:35:07,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-12-23 00:35:07,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 151 transitions. [2020-12-23 00:35:07,389 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 151 transitions. Word has length 55 [2020-12-23 00:35:07,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:35:07,389 INFO L481 AbstractCegarLoop]: Abstraction has 137 states and 151 transitions. [2020-12-23 00:35:07,389 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-12-23 00:35:07,390 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 151 transitions. [2020-12-23 00:35:07,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-12-23 00:35:07,391 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:35:07,391 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:35:07,605 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-12-23 00:35:07,606 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:35:07,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:35:07,607 INFO L82 PathProgramCache]: Analyzing trace with hash -1012702775, now seen corresponding path program 5 times [2020-12-23 00:35:07,608 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:35:07,608 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230840529] [2020-12-23 00:35:07,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:35:07,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:35:07,941 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 95 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:35:07,942 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230840529] [2020-12-23 00:35:07,943 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2054690664] [2020-12-23 00:35:07,943 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:35:08,169 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-12-23 00:35:08,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:35:08,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-23 00:35:08,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:35:08,258 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2020-12-23 00:35:08,259 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:35:08,267 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:35:08,268 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:35:08,269 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:19 [2020-12-23 00:35:08,389 INFO L348 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2020-12-23 00:35:08,390 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2020-12-23 00:35:08,393 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:35:08,406 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:35:08,407 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:35:08,409 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:28 [2020-12-23 00:35:08,547 INFO L348 Elim1Store]: treesize reduction 56, result has 49.1 percent of original size [2020-12-23 00:35:08,548 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 72 [2020-12-23 00:35:08,552 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:35:08,604 INFO L625 ElimStorePlain]: treesize reduction 22, result has 64.5 percent of original size [2020-12-23 00:35:08,606 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:35:08,607 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:44, output treesize:40 [2020-12-23 00:35:08,892 INFO L348 Elim1Store]: treesize reduction 162, result has 17.3 percent of original size [2020-12-23 00:35:08,904 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 47 treesize of output 52 [2020-12-23 00:35:08,908 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:35:08,928 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:35:08,931 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 00:35:08,932 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:58, output treesize:54 [2020-12-23 00:35:09,225 WARN L197 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 45 [2020-12-23 00:35:09,227 INFO L348 Elim1Store]: treesize reduction 166, result has 44.7 percent of original size [2020-12-23 00:35:09,228 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 59 treesize of output 155 [2020-12-23 00:35:09,232 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:35:09,311 INFO L625 ElimStorePlain]: treesize reduction 51, result has 56.4 percent of original size [2020-12-23 00:35:09,315 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-12-23 00:35:09,316 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:70, output treesize:66 [2020-12-23 00:35:11,960 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 00:35:11,964 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 00:35:11,969 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-23 00:35:11,976 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-23 00:35:11,979 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 7 disjuncts [2020-12-23 00:35:12,078 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 36 proven. 15 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2020-12-23 00:35:12,078 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:35:12,078 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 27 [2020-12-23 00:35:12,079 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134484954] [2020-12-23 00:35:12,079 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-12-23 00:35:12,079 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:35:12,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-12-23 00:35:12,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=631, Unknown=1, NotChecked=0, Total=702 [2020-12-23 00:35:12,081 INFO L87 Difference]: Start difference. First operand 137 states and 151 transitions. Second operand 27 states. [2020-12-23 00:35:38,355 WARN L197 SmtUtils]: Spent 2.03 s on a formula simplification that was a NOOP. DAG size: 51 [2020-12-23 00:35:47,159 WARN L197 SmtUtils]: Spent 598.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2020-12-23 00:35:50,095 WARN L197 SmtUtils]: Spent 2.85 s on a formula simplification. DAG size of input: 51 DAG size of output: 47 [2020-12-23 00:35:56,428 WARN L197 SmtUtils]: Spent 2.03 s on a formula simplification that was a NOOP. DAG size: 46 [2020-12-23 00:35:58,526 WARN L197 SmtUtils]: Spent 2.02 s on a formula simplification that was a NOOP. DAG size: 47 [2020-12-23 00:36:04,714 WARN L197 SmtUtils]: Spent 2.03 s on a formula simplification that was a NOOP. DAG size: 49 [2020-12-23 00:36:08,938 WARN L197 SmtUtils]: Spent 2.03 s on a formula simplification that was a NOOP. DAG size: 48 [2020-12-23 00:36:13,045 WARN L197 SmtUtils]: Spent 4.05 s on a formula simplification. DAG size of input: 53 DAG size of output: 48 [2020-12-23 00:36:17,826 WARN L197 SmtUtils]: Spent 4.06 s on a formula simplification. DAG size of input: 55 DAG size of output: 50 [2020-12-23 00:36:21,940 WARN L197 SmtUtils]: Spent 4.06 s on a formula simplification. DAG size of input: 54 DAG size of output: 49 [2020-12-23 00:36:28,172 WARN L197 SmtUtils]: Spent 4.05 s on a formula simplification. DAG size of input: 53 DAG size of output: 48 [2020-12-23 00:36:32,345 WARN L197 SmtUtils]: Spent 4.06 s on a formula simplification. DAG size of input: 54 DAG size of output: 49 [2020-12-23 00:36:36,625 WARN L197 SmtUtils]: Spent 4.06 s on a formula simplification. DAG size of input: 46 DAG size of output: 45 [2020-12-23 00:36:40,795 WARN L197 SmtUtils]: Spent 4.06 s on a formula simplification. DAG size of input: 47 DAG size of output: 46 [2020-12-23 00:36:46,970 WARN L197 SmtUtils]: Spent 4.05 s on a formula simplification. DAG size of input: 43 DAG size of output: 42 [2020-12-23 00:36:49,128 WARN L197 SmtUtils]: Spent 2.03 s on a formula simplification that was a NOOP. DAG size: 51 [2020-12-23 00:36:51,306 WARN L197 SmtUtils]: Spent 2.03 s on a formula simplification that was a NOOP. DAG size: 52 [2020-12-23 00:36:53,551 WARN L197 SmtUtils]: Spent 2.03 s on a formula simplification that was a NOOP. DAG size: 51 [2020-12-23 00:36:55,674 WARN L197 SmtUtils]: Spent 2.03 s on a formula simplification that was a NOOP. DAG size: 53 [2020-12-23 00:36:56,614 WARN L197 SmtUtils]: Spent 876.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2020-12-23 00:36:58,919 WARN L197 SmtUtils]: Spent 2.03 s on a formula simplification that was a NOOP. DAG size: 48 [2020-12-23 00:37:09,066 WARN L197 SmtUtils]: Spent 2.03 s on a formula simplification that was a NOOP. DAG size: 44 [2020-12-23 00:37:09,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:37:09,138 INFO L93 Difference]: Finished difference Result 245 states and 268 transitions. [2020-12-23 00:37:09,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2020-12-23 00:37:09,139 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 55 [2020-12-23 00:37:09,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:37:09,141 INFO L225 Difference]: With dead ends: 245 [2020-12-23 00:37:09,141 INFO L226 Difference]: Without dead ends: 217 [2020-12-23 00:37:09,144 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 39 SyntacticMatches, 5 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2585 ImplicationChecksByTransitivity, 95.6s TimeCoverageRelationStatistics Valid=910, Invalid=7263, Unknown=17, NotChecked=0, Total=8190 [2020-12-23 00:37:09,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2020-12-23 00:37:09,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 149. [2020-12-23 00:37:09,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2020-12-23 00:37:09,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 162 transitions. [2020-12-23 00:37:09,166 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 162 transitions. Word has length 55 [2020-12-23 00:37:09,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:37:09,166 INFO L481 AbstractCegarLoop]: Abstraction has 149 states and 162 transitions. [2020-12-23 00:37:09,166 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-12-23 00:37:09,166 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 162 transitions. [2020-12-23 00:37:09,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-12-23 00:37:09,167 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:37:09,168 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:37:09,368 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:37:09,369 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:37:09,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:37:09,370 INFO L82 PathProgramCache]: Analyzing trace with hash 1404832086, now seen corresponding path program 8 times [2020-12-23 00:37:09,370 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:37:09,370 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970982751] [2020-12-23 00:37:09,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:37:09,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:37:10,155 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 83 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:37:10,155 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970982751] [2020-12-23 00:37:10,155 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [64786269] [2020-12-23 00:37:10,156 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:37:10,229 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 00:37:10,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:37:10,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-23 00:37:10,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:37:11,028 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 114 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:37:11,028 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:37:11,028 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 29 [2020-12-23 00:37:11,029 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513951413] [2020-12-23 00:37:11,029 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-12-23 00:37:11,029 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:37:11,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-12-23 00:37:11,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=610, Unknown=0, NotChecked=0, Total=812 [2020-12-23 00:37:11,031 INFO L87 Difference]: Start difference. First operand 149 states and 162 transitions. Second operand 29 states. [2020-12-23 00:37:11,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:37:11,799 INFO L93 Difference]: Finished difference Result 284 states and 308 transitions. [2020-12-23 00:37:11,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-23 00:37:11,800 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 61 [2020-12-23 00:37:11,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:37:11,802 INFO L225 Difference]: With dead ends: 284 [2020-12-23 00:37:11,802 INFO L226 Difference]: Without dead ends: 170 [2020-12-23 00:37:11,803 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 278 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=321, Invalid=939, Unknown=0, NotChecked=0, Total=1260 [2020-12-23 00:37:11,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2020-12-23 00:37:11,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 161. [2020-12-23 00:37:11,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-12-23 00:37:11,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 174 transitions. [2020-12-23 00:37:11,833 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 174 transitions. Word has length 61 [2020-12-23 00:37:11,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:37:11,833 INFO L481 AbstractCegarLoop]: Abstraction has 161 states and 174 transitions. [2020-12-23 00:37:11,833 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-12-23 00:37:11,834 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 174 transitions. [2020-12-23 00:37:11,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-12-23 00:37:11,835 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:37:11,835 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:37:12,049 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-12-23 00:37:12,050 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:37:12,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:37:12,051 INFO L82 PathProgramCache]: Analyzing trace with hash 337347535, now seen corresponding path program 9 times [2020-12-23 00:37:12,051 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:37:12,052 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462056690] [2020-12-23 00:37:12,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:37:12,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:37:12,623 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 12 proven. 130 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:37:12,623 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462056690] [2020-12-23 00:37:12,623 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2076990982] [2020-12-23 00:37:12,624 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:37:12,812 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-12-23 00:37:12,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:37:12,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 33 conjunts are in the unsatisfiable core [2020-12-23 00:37:12,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:37:13,030 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2020-12-23 00:37:13,032 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:37:13,046 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:37:13,048 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 00:37:13,049 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:19 [2020-12-23 00:37:13,130 INFO L348 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2020-12-23 00:37:13,131 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 00:37:13,134 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:37:13,144 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:37:13,145 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:37:13,146 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:22 [2020-12-23 00:37:13,794 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 00:37:13,799 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 00:37:13,923 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 12 proven. 130 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:37:13,923 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:37:13,924 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 32 [2020-12-23 00:37:13,924 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20575506] [2020-12-23 00:37:13,924 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-12-23 00:37:13,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:37:13,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-12-23 00:37:13,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=897, Unknown=0, NotChecked=0, Total=992 [2020-12-23 00:37:13,926 INFO L87 Difference]: Start difference. First operand 161 states and 174 transitions. Second operand 32 states. [2020-12-23 00:37:17,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:37:17,958 INFO L93 Difference]: Finished difference Result 241 states and 261 transitions. [2020-12-23 00:37:17,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-12-23 00:37:17,959 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 65 [2020-12-23 00:37:17,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:37:17,961 INFO L225 Difference]: With dead ends: 241 [2020-12-23 00:37:17,961 INFO L226 Difference]: Without dead ends: 231 [2020-12-23 00:37:17,964 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 859 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=418, Invalid=3614, Unknown=0, NotChecked=0, Total=4032 [2020-12-23 00:37:17,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2020-12-23 00:37:17,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 167. [2020-12-23 00:37:17,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-12-23 00:37:17,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 180 transitions. [2020-12-23 00:37:17,993 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 180 transitions. Word has length 65 [2020-12-23 00:37:17,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:37:17,994 INFO L481 AbstractCegarLoop]: Abstraction has 167 states and 180 transitions. [2020-12-23 00:37:17,994 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-12-23 00:37:17,994 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 180 transitions. [2020-12-23 00:37:17,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-12-23 00:37:17,995 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:37:17,995 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:37:18,209 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-12-23 00:37:18,210 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:37:18,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:37:18,211 INFO L82 PathProgramCache]: Analyzing trace with hash 283122771, now seen corresponding path program 6 times [2020-12-23 00:37:18,211 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:37:18,212 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058037004] [2020-12-23 00:37:18,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:37:18,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:37:18,675 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 12 proven. 130 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:37:18,675 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058037004] [2020-12-23 00:37:18,675 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1831491664] [2020-12-23 00:37:18,675 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:37:18,834 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-12-23 00:37:18,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:37:18,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 26 conjunts are in the unsatisfiable core [2020-12-23 00:37:18,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:37:19,000 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2020-12-23 00:37:19,002 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:37:19,015 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:37:19,016 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:37:19,017 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:22 [2020-12-23 00:37:19,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:37:19,149 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2020-12-23 00:37:19,151 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:37:19,170 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:37:19,173 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:37:19,174 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:31 [2020-12-23 00:37:19,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:37:19,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:37:19,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:37:19,270 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:37:19,271 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 40 [2020-12-23 00:37:19,273 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:37:19,293 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:37:19,294 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:37:19,295 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:47, output treesize:43 [2020-12-23 00:37:19,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:37:19,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:37:19,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:37:19,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:37:19,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:37:19,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:37:19,501 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:37:19,502 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 47 treesize of output 52 [2020-12-23 00:37:19,507 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:37:19,530 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:37:19,532 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 00:37:19,533 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:61, output treesize:57 [2020-12-23 00:37:19,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:37:19,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:37:19,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:37:19,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:37:19,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:37:19,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:37:19,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:37:19,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:37:19,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:37:19,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:37:19,677 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:37:19,678 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 59 treesize of output 67 [2020-12-23 00:37:19,680 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:37:19,707 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:37:19,712 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-12-23 00:37:19,713 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:73, output treesize:69 [2020-12-23 00:37:20,595 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 00:37:20,598 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 00:37:20,602 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-23 00:37:20,606 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-23 00:37:20,607 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 7 disjuncts [2020-12-23 00:37:20,755 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 68 proven. 50 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-12-23 00:37:20,755 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:37:20,756 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2020-12-23 00:37:20,756 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924952878] [2020-12-23 00:37:20,757 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-12-23 00:37:20,757 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:37:20,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-12-23 00:37:20,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=907, Unknown=0, NotChecked=0, Total=992 [2020-12-23 00:37:20,760 INFO L87 Difference]: Start difference. First operand 167 states and 180 transitions. Second operand 32 states. [2020-12-23 00:37:23,253 WARN L197 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 49 [2020-12-23 00:37:24,146 WARN L197 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 54 [2020-12-23 00:37:25,772 WARN L197 SmtUtils]: Spent 511.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 54 [2020-12-23 00:37:28,452 WARN L197 SmtUtils]: Spent 2.04 s on a formula simplification that was a NOOP. DAG size: 48 [2020-12-23 00:37:30,047 WARN L197 SmtUtils]: Spent 1.35 s on a formula simplification. DAG size of input: 52 DAG size of output: 49 [2020-12-23 00:37:33,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:37:33,461 INFO L93 Difference]: Finished difference Result 274 states and 296 transitions. [2020-12-23 00:37:33,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2020-12-23 00:37:33,462 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 65 [2020-12-23 00:37:33,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:37:33,467 INFO L225 Difference]: With dead ends: 274 [2020-12-23 00:37:33,467 INFO L226 Difference]: Without dead ends: 252 [2020-12-23 00:37:33,469 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2453 ImplicationChecksByTransitivity, 10.6s TimeCoverageRelationStatistics Valid=738, Invalid=7818, Unknown=0, NotChecked=0, Total=8556 [2020-12-23 00:37:33,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2020-12-23 00:37:33,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 167. [2020-12-23 00:37:33,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-12-23 00:37:33,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 179 transitions. [2020-12-23 00:37:33,491 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 179 transitions. Word has length 65 [2020-12-23 00:37:33,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:37:33,492 INFO L481 AbstractCegarLoop]: Abstraction has 167 states and 179 transitions. [2020-12-23 00:37:33,492 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-12-23 00:37:33,492 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 179 transitions. [2020-12-23 00:37:33,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-12-23 00:37:33,493 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:37:33,493 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:37:33,706 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-12-23 00:37:33,707 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:37:33,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:37:33,708 INFO L82 PathProgramCache]: Analyzing trace with hash 1382106319, now seen corresponding path program 3 times [2020-12-23 00:37:33,708 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:37:33,709 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570991114] [2020-12-23 00:37:33,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:37:33,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:37:34,022 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:37:34,022 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570991114] [2020-12-23 00:37:34,023 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1701272795] [2020-12-23 00:37:34,023 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:37:34,128 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-12-23 00:37:34,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:37:34,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 22 conjunts are in the unsatisfiable core [2020-12-23 00:37:34,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:37:34,232 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2020-12-23 00:37:34,234 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:37:34,248 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:37:34,250 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:37:34,250 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:22 [2020-12-23 00:37:34,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:37:34,317 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2020-12-23 00:37:34,319 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:37:34,336 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:37:34,338 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:37:34,338 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:34 [2020-12-23 00:37:34,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:37:34,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:37:34,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:37:34,484 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:37:34,485 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 35 [2020-12-23 00:37:34,487 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:37:34,506 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:37:34,508 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:37:34,508 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:42, output treesize:38 [2020-12-23 00:37:34,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:37:34,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:37:34,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:37:34,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:37:34,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:37:34,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:37:34,616 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:37:34,617 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 45 treesize of output 50 [2020-12-23 00:37:34,620 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:37:34,642 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:37:34,643 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:37:34,644 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:54, output treesize:50 [2020-12-23 00:37:34,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:37:34,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:37:34,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:37:34,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:37:34,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:37:34,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:37:34,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:37:34,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:37:34,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:37:34,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:37:34,874 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:37:34,875 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 57 treesize of output 65 [2020-12-23 00:37:34,878 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:37:34,911 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:37:34,914 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 00:37:34,914 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:71, output treesize:67 [2020-12-23 00:37:35,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:37:35,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:37:35,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:37:35,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:37:35,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:37:35,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:37:35,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:37:35,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:37:35,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:37:35,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:37:35,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:37:35,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:37:35,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:37:35,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:37:35,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:37:35,084 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:37:35,085 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 69 treesize of output 80 [2020-12-23 00:37:35,088 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:37:35,125 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:37:35,127 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 00:37:35,128 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:83, output treesize:79 [2020-12-23 00:37:35,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:37:35,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:37:35,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:37:35,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:37:35,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:37:35,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:37:35,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:37:35,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:37:35,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:37:35,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:37:35,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:37:35,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:37:35,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:37:35,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:37:35,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:37:35,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:37:35,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:37:35,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:37:35,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:37:35,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:37:35,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:37:35,795 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:37:35,796 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 81 treesize of output 95 [2020-12-23 00:37:35,799 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:37:35,844 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:37:35,848 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-12-23 00:37:35,849 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:100, output treesize:96 [2020-12-23 00:37:35,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:37:35,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:37:35,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:37:35,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:37:35,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:37:36,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:37:36,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:37:36,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:37:36,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:37:36,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:37:36,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:37:36,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:37:36,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:37:36,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:37:36,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:37:36,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:37:36,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:37:36,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:37:36,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:37:36,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:37:36,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:37:36,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:37:36,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:37:36,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:37:36,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:37:36,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:37:36,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:37:36,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:37:36,055 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:37:36,055 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 28 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 93 treesize of output 110 [2020-12-23 00:37:36,059 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:37:36,109 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:37:36,115 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2020-12-23 00:37:36,116 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:112, output treesize:108 [2020-12-23 00:37:40,256 WARN L197 SmtUtils]: Spent 2.02 s on a formula simplification that was a NOOP. DAG size: 52 [2020-12-23 00:37:42,426 WARN L197 SmtUtils]: Spent 2.03 s on a formula simplification that was a NOOP. DAG size: 54 [2020-12-23 00:37:42,441 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 00:37:42,444 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 00:37:42,447 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 9 disjuncts [2020-12-23 00:37:42,452 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 9 disjuncts [2020-12-23 00:37:42,454 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 12 disjuncts [2020-12-23 00:37:42,563 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 20 proven. 20 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2020-12-23 00:37:42,563 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:37:42,563 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2020-12-23 00:37:42,563 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808471197] [2020-12-23 00:37:42,564 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-12-23 00:37:42,564 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:37:42,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-12-23 00:37:42,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=892, Unknown=1, NotChecked=0, Total=992 [2020-12-23 00:37:42,565 INFO L87 Difference]: Start difference. First operand 167 states and 179 transitions. Second operand 32 states. [2020-12-23 00:37:45,298 WARN L197 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 55 [2020-12-23 00:37:47,567 WARN L197 SmtUtils]: Spent 2.08 s on a formula simplification that was a NOOP. DAG size: 70 [2020-12-23 00:37:49,866 WARN L197 SmtUtils]: Spent 2.03 s on a formula simplification that was a NOOP. DAG size: 60 [2020-12-23 00:37:52,692 WARN L197 SmtUtils]: Spent 2.67 s on a formula simplification that was a NOOP. DAG size: 73 [2020-12-23 00:37:54,792 WARN L197 SmtUtils]: Spent 2.03 s on a formula simplification that was a NOOP. DAG size: 62 [2020-12-23 00:37:58,416 WARN L197 SmtUtils]: Spent 3.49 s on a formula simplification that was a NOOP. DAG size: 73 [2020-12-23 00:38:00,545 WARN L197 SmtUtils]: Spent 2.04 s on a formula simplification that was a NOOP. DAG size: 61 [2020-12-23 00:38:02,692 WARN L197 SmtUtils]: Spent 2.07 s on a formula simplification that was a NOOP. DAG size: 67 [2020-12-23 00:38:04,857 WARN L197 SmtUtils]: Spent 2.05 s on a formula simplification that was a NOOP. DAG size: 64 [2020-12-23 00:38:09,184 WARN L197 SmtUtils]: Spent 4.15 s on a formula simplification. DAG size of input: 70 DAG size of output: 67 [2020-12-23 00:38:11,312 WARN L197 SmtUtils]: Spent 2.04 s on a formula simplification that was a NOOP. DAG size: 63 [2020-12-23 00:38:15,308 WARN L197 SmtUtils]: Spent 3.89 s on a formula simplification that was a NOOP. DAG size: 70 [2020-12-23 00:38:19,485 WARN L197 SmtUtils]: Spent 4.09 s on a formula simplification. DAG size of input: 67 DAG size of output: 60 [2020-12-23 00:38:21,619 WARN L197 SmtUtils]: Spent 2.06 s on a formula simplification that was a NOOP. DAG size: 64 [2020-12-23 00:38:25,821 WARN L197 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 69 DAG size of output: 62 [2020-12-23 00:38:30,034 WARN L197 SmtUtils]: Spent 4.10 s on a formula simplification. DAG size of input: 68 DAG size of output: 61 [2020-12-23 00:38:34,283 WARN L197 SmtUtils]: Spent 4.16 s on a formula simplification. DAG size of input: 67 DAG size of output: 64 [2020-12-23 00:38:39,281 WARN L197 SmtUtils]: Spent 4.88 s on a formula simplification. DAG size of input: 67 DAG size of output: 64 [2020-12-23 00:38:41,434 WARN L197 SmtUtils]: Spent 2.05 s on a formula simplification that was a NOOP. DAG size: 60