/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/nr4.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-178dd20 [2021-01-06 10:20:11,892 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-06 10:20:11,896 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-06 10:20:11,948 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-01-06 10:20:11,949 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-01-06 10:20:11,951 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-01-06 10:20:11,953 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-01-06 10:20:11,956 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-01-06 10:20:11,959 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-01-06 10:20:11,961 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-01-06 10:20:11,962 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-01-06 10:20:11,964 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-01-06 10:20:11,965 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-06 10:20:11,966 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-06 10:20:11,968 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-06 10:20:11,970 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-06 10:20:11,971 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-06 10:20:11,989 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-06 10:20:11,995 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-06 10:20:11,999 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-06 10:20:12,002 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-06 10:20:12,009 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-06 10:20:12,011 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-06 10:20:12,014 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-06 10:20:12,026 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-01-06 10:20:12,049 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-06 10:20:12,051 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-06 10:20:12,051 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-06 10:20:12,052 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-01-06 10:20:12,083 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-06 10:20:12,083 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-06 10:20:12,085 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-06 10:20:12,086 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-06 10:20:12,086 INFO L138 SettingsManager]: * Use SBE=true [2021-01-06 10:20:12,087 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-06 10:20:12,087 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-06 10:20:12,087 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-06 10:20:12,087 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-01-06 10:20:12,088 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-06 10:20:12,088 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-01-06 10:20:12,088 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-01-06 10:20:12,088 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-06 10:20:12,089 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-01-06 10:20:12,089 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-06 10:20:12,089 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-06 10:20:12,090 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-06 10:20:12,090 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 10:20:12,090 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-06 10:20:12,090 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-06 10:20:12,091 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-01-06 10:20:12,091 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-06 10:20:12,091 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-06 10:20:12,092 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-01-06 10:20:12,092 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-01-06 10:20:12,092 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-06 10:20:12,531 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-06 10:20:12,576 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-06 10:20:12,580 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-06 10:20:12,581 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-06 10:20:12,582 INFO L275 PluginConnector]: CDTParser initialized [2021-01-06 10:20:12,584 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-tiling/nr4.c [2021-01-06 10:20:12,691 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/6ed183c9f/0a2da21a28434d47ba7e6f980ba0336e/FLAG8cbea3866 [2021-01-06 10:20:13,421 INFO L306 CDTParser]: Found 1 translation units. [2021-01-06 10:20:13,422 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-tiling/nr4.c [2021-01-06 10:20:13,431 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/6ed183c9f/0a2da21a28434d47ba7e6f980ba0336e/FLAG8cbea3866 [2021-01-06 10:20:13,808 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/6ed183c9f/0a2da21a28434d47ba7e6f980ba0336e [2021-01-06 10:20:13,813 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-06 10:20:13,817 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-01-06 10:20:13,820 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-06 10:20:13,821 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-06 10:20:13,825 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-06 10:20:13,827 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 10:20:13" (1/1) ... [2021-01-06 10:20:13,829 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@75a6a1a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:20:13, skipping insertion in model container [2021-01-06 10:20:13,830 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 10:20:13" (1/1) ... [2021-01-06 10:20:13,841 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-06 10:20:13,873 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-01-06 10:20:14,042 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/nr4.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: VariableLHS[~j~0,] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~volArray~0,],[BinaryExpression[ARITHMINUS,BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~0,]],IdentifierExpression[~j~0,]]]] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~volArray~0,],[BinaryExpression[ARITHMINUS,BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~0,]],IdentifierExpression[~j~0,]]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] [2021-01-06 10:20:14,069 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 10:20:14,080 INFO L203 MainTranslator]: Completed pre-run [2021-01-06 10:20:14,098 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/nr4.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: VariableLHS[~j~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[4],IdentifierExpression[~i~0,]],IdentifierExpression[~j~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[4],IdentifierExpression[~i~0,]],IdentifierExpression[~j~0,]]]]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] [2021-01-06 10:20:14,109 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 10:20:14,128 INFO L208 MainTranslator]: Completed translation [2021-01-06 10:20:14,129 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:20:14 WrapperNode [2021-01-06 10:20:14,129 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-06 10:20:14,130 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-06 10:20:14,131 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-06 10:20:14,131 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-06 10:20:14,142 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:20:14" (1/1) ... [2021-01-06 10:20:14,164 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:20:14" (1/1) ... [2021-01-06 10:20:14,221 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-06 10:20:14,225 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-06 10:20:14,225 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-06 10:20:14,225 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-06 10:20:14,239 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:20:14" (1/1) ... [2021-01-06 10:20:14,239 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:20:14" (1/1) ... [2021-01-06 10:20:14,242 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:20:14" (1/1) ... [2021-01-06 10:20:14,243 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:20:14" (1/1) ... [2021-01-06 10:20:14,250 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:20:14" (1/1) ... [2021-01-06 10:20:14,256 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:20:14" (1/1) ... [2021-01-06 10:20:14,258 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:20:14" (1/1) ... [2021-01-06 10:20:14,261 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-06 10:20:14,262 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-06 10:20:14,262 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-06 10:20:14,263 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-06 10:20:14,264 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:20:14" (1/1) ... No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 10:20:14,385 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-06 10:20:14,385 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-06 10:20:14,385 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-01-06 10:20:14,386 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-06 10:20:14,386 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-06 10:20:14,386 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-01-06 10:20:14,386 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-01-06 10:20:14,702 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-06 10:20:14,702 INFO L299 CfgBuilder]: Removed 11 assume(true) statements. [2021-01-06 10:20:14,705 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 10:20:14 BoogieIcfgContainer [2021-01-06 10:20:14,705 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-06 10:20:14,744 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-06 10:20:14,744 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-06 10:20:14,752 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-06 10:20:14,752 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.01 10:20:13" (1/3) ... [2021-01-06 10:20:14,753 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f1b9a3a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 10:20:14, skipping insertion in model container [2021-01-06 10:20:14,753 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:20:14" (2/3) ... [2021-01-06 10:20:14,754 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f1b9a3a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 10:20:14, skipping insertion in model container [2021-01-06 10:20:14,754 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 10:20:14" (3/3) ... [2021-01-06 10:20:14,756 INFO L111 eAbstractionObserver]: Analyzing ICFG nr4.c [2021-01-06 10:20:14,765 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-06 10:20:14,772 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-01-06 10:20:14,804 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-01-06 10:20:14,843 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-06 10:20:14,844 INFO L378 AbstractCegarLoop]: Hoare is true [2021-01-06 10:20:14,844 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-06 10:20:14,844 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-06 10:20:14,844 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-06 10:20:14,844 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-06 10:20:14,845 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-01-06 10:20:14,845 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-06 10:20:14,865 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states. [2021-01-06 10:20:14,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-01-06 10:20:14,877 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:20:14,879 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:20:14,883 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:20:14,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:20:14,900 INFO L82 PathProgramCache]: Analyzing trace with hash -405965127, now seen corresponding path program 1 times [2021-01-06 10:20:14,931 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:20:14,932 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594474192] [2021-01-06 10:20:14,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:20:15,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:20:15,316 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:20:15,318 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594474192] [2021-01-06 10:20:15,319 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 10:20:15,320 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-01-06 10:20:15,321 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854109356] [2021-01-06 10:20:15,329 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-01-06 10:20:15,330 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:20:15,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-01-06 10:20:15,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-01-06 10:20:15,349 INFO L87 Difference]: Start difference. First operand 25 states. Second operand 2 states. [2021-01-06 10:20:15,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:20:15,368 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2021-01-06 10:20:15,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-01-06 10:20:15,370 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 13 [2021-01-06 10:20:15,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:20:15,381 INFO L225 Difference]: With dead ends: 45 [2021-01-06 10:20:15,381 INFO L226 Difference]: Without dead ends: 20 [2021-01-06 10:20:15,385 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-01-06 10:20:15,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-01-06 10:20:15,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2021-01-06 10:20:15,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2021-01-06 10:20:15,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2021-01-06 10:20:15,429 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 13 [2021-01-06 10:20:15,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:20:15,430 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2021-01-06 10:20:15,430 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2021-01-06 10:20:15,430 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2021-01-06 10:20:15,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-01-06 10:20:15,431 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:20:15,431 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:20:15,432 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-01-06 10:20:15,432 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:20:15,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:20:15,434 INFO L82 PathProgramCache]: Analyzing trace with hash 274093243, now seen corresponding path program 1 times [2021-01-06 10:20:15,434 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:20:15,434 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901425159] [2021-01-06 10:20:15,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:20:15,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:20:15,576 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:20:15,577 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901425159] [2021-01-06 10:20:15,577 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 10:20:15,578 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-01-06 10:20:15,578 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766327636] [2021-01-06 10:20:15,580 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-01-06 10:20:15,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:20:15,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-01-06 10:20:15,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-01-06 10:20:15,587 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand 4 states. [2021-01-06 10:20:15,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:20:15,684 INFO L93 Difference]: Finished difference Result 29 states and 34 transitions. [2021-01-06 10:20:15,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-06 10:20:15,685 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2021-01-06 10:20:15,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:20:15,686 INFO L225 Difference]: With dead ends: 29 [2021-01-06 10:20:15,686 INFO L226 Difference]: Without dead ends: 27 [2021-01-06 10:20:15,688 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-01-06 10:20:15,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-01-06 10:20:15,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 22. [2021-01-06 10:20:15,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2021-01-06 10:20:15,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2021-01-06 10:20:15,695 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 13 [2021-01-06 10:20:15,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:20:15,695 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2021-01-06 10:20:15,696 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-01-06 10:20:15,696 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2021-01-06 10:20:15,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-01-06 10:20:15,697 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:20:15,697 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:20:15,697 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-01-06 10:20:15,698 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:20:15,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:20:15,698 INFO L82 PathProgramCache]: Analyzing trace with hash 274152825, now seen corresponding path program 1 times [2021-01-06 10:20:15,699 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:20:15,699 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821950040] [2021-01-06 10:20:15,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:20:15,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:20:15,863 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:20:15,864 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821950040] [2021-01-06 10:20:15,864 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 10:20:15,864 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-01-06 10:20:15,865 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164000269] [2021-01-06 10:20:15,865 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 10:20:15,865 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:20:15,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 10:20:15,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-01-06 10:20:15,867 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand 5 states. [2021-01-06 10:20:15,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:20:15,927 INFO L93 Difference]: Finished difference Result 38 states and 46 transitions. [2021-01-06 10:20:15,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-06 10:20:15,928 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2021-01-06 10:20:15,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:20:15,929 INFO L225 Difference]: With dead ends: 38 [2021-01-06 10:20:15,929 INFO L226 Difference]: Without dead ends: 27 [2021-01-06 10:20:15,930 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-01-06 10:20:15,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-01-06 10:20:15,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 23. [2021-01-06 10:20:15,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2021-01-06 10:20:15,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2021-01-06 10:20:15,937 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 13 [2021-01-06 10:20:15,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:20:15,937 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2021-01-06 10:20:15,937 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 10:20:15,938 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2021-01-06 10:20:15,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-01-06 10:20:15,938 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:20:15,939 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:20:15,939 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-01-06 10:20:15,939 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:20:15,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:20:15,940 INFO L82 PathProgramCache]: Analyzing trace with hash -715167033, now seen corresponding path program 1 times [2021-01-06 10:20:15,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:20:15,941 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26260074] [2021-01-06 10:20:15,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:20:15,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:20:16,016 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:20:16,017 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26260074] [2021-01-06 10:20:16,017 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 10:20:16,017 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 10:20:16,018 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131200459] [2021-01-06 10:20:16,019 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 10:20:16,019 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:20:16,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 10:20:16,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 10:20:16,022 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand 3 states. [2021-01-06 10:20:16,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:20:16,074 INFO L93 Difference]: Finished difference Result 42 states and 52 transitions. [2021-01-06 10:20:16,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 10:20:16,075 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2021-01-06 10:20:16,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:20:16,078 INFO L225 Difference]: With dead ends: 42 [2021-01-06 10:20:16,078 INFO L226 Difference]: Without dead ends: 26 [2021-01-06 10:20:16,080 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 10:20:16,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-01-06 10:20:16,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 24. [2021-01-06 10:20:16,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2021-01-06 10:20:16,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2021-01-06 10:20:16,092 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 16 [2021-01-06 10:20:16,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:20:16,093 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2021-01-06 10:20:16,093 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 10:20:16,094 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2021-01-06 10:20:16,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-01-06 10:20:16,095 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:20:16,096 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:20:16,096 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-01-06 10:20:16,097 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:20:16,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:20:16,099 INFO L82 PathProgramCache]: Analyzing trace with hash 1618667584, now seen corresponding path program 1 times [2021-01-06 10:20:16,100 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:20:16,100 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998015831] [2021-01-06 10:20:16,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:20:16,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:20:16,214 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:20:16,215 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998015831] [2021-01-06 10:20:16,215 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [453649782] [2021-01-06 10:20:16,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:20:16,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:20:16,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 3 conjunts are in the unsatisfiable core [2021-01-06 10:20:16,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:20:16,376 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:20:16,377 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:20:16,378 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-01-06 10:20:16,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271518780] [2021-01-06 10:20:16,379 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-01-06 10:20:16,379 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:20:16,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-01-06 10:20:16,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-01-06 10:20:16,380 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand 4 states. [2021-01-06 10:20:16,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:20:16,422 INFO L93 Difference]: Finished difference Result 46 states and 57 transitions. [2021-01-06 10:20:16,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-01-06 10:20:16,422 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2021-01-06 10:20:16,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:20:16,423 INFO L225 Difference]: With dead ends: 46 [2021-01-06 10:20:16,423 INFO L226 Difference]: Without dead ends: 29 [2021-01-06 10:20:16,424 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-01-06 10:20:16,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-01-06 10:20:16,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2021-01-06 10:20:16,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2021-01-06 10:20:16,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 32 transitions. [2021-01-06 10:20:16,430 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 32 transitions. Word has length 19 [2021-01-06 10:20:16,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:20:16,431 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 32 transitions. [2021-01-06 10:20:16,431 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-01-06 10:20:16,431 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 32 transitions. [2021-01-06 10:20:16,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-01-06 10:20:16,432 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:20:16,432 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:20:16,646 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:20:16,647 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:20:16,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:20:16,648 INFO L82 PathProgramCache]: Analyzing trace with hash 1955154983, now seen corresponding path program 2 times [2021-01-06 10:20:16,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:20:16,649 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399191372] [2021-01-06 10:20:16,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:20:16,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:20:16,726 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-01-06 10:20:16,726 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399191372] [2021-01-06 10:20:16,727 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 10:20:16,727 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-01-06 10:20:16,727 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335845178] [2021-01-06 10:20:16,728 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 10:20:16,728 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:20:16,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 10:20:16,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-01-06 10:20:16,729 INFO L87 Difference]: Start difference. First operand 27 states and 32 transitions. Second operand 5 states. [2021-01-06 10:20:16,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:20:16,765 INFO L93 Difference]: Finished difference Result 49 states and 60 transitions. [2021-01-06 10:20:16,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-06 10:20:16,766 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 22 [2021-01-06 10:20:16,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:20:16,767 INFO L225 Difference]: With dead ends: 49 [2021-01-06 10:20:16,767 INFO L226 Difference]: Without dead ends: 29 [2021-01-06 10:20:16,768 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-01-06 10:20:16,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-01-06 10:20:16,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2021-01-06 10:20:16,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2021-01-06 10:20:16,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2021-01-06 10:20:16,796 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 22 [2021-01-06 10:20:16,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:20:16,796 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2021-01-06 10:20:16,797 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 10:20:16,797 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2021-01-06 10:20:16,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-01-06 10:20:16,798 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:20:16,798 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] [2021-01-06 10:20:16,798 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-01-06 10:20:16,799 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:20:16,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:20:16,799 INFO L82 PathProgramCache]: Analyzing trace with hash -1638747735, now seen corresponding path program 1 times [2021-01-06 10:20:16,800 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:20:16,800 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246566217] [2021-01-06 10:20:16,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:20:16,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:20:16,869 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:20:16,869 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246566217] [2021-01-06 10:20:16,870 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [482484944] [2021-01-06 10:20:16,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:20:16,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:20:16,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 4 conjunts are in the unsatisfiable core [2021-01-06 10:20:16,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:20:17,028 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:20:17,028 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:20:17,029 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-01-06 10:20:17,029 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137542049] [2021-01-06 10:20:17,030 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-01-06 10:20:17,030 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:20:17,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-01-06 10:20:17,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2021-01-06 10:20:17,031 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand 8 states. [2021-01-06 10:20:17,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:20:17,085 INFO L93 Difference]: Finished difference Result 51 states and 60 transitions. [2021-01-06 10:20:17,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-06 10:20:17,085 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 22 [2021-01-06 10:20:17,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:20:17,086 INFO L225 Difference]: With dead ends: 51 [2021-01-06 10:20:17,086 INFO L226 Difference]: Without dead ends: 31 [2021-01-06 10:20:17,087 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2021-01-06 10:20:17,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-01-06 10:20:17,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2021-01-06 10:20:17,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2021-01-06 10:20:17,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2021-01-06 10:20:17,093 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 22 [2021-01-06 10:20:17,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:20:17,094 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2021-01-06 10:20:17,094 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-01-06 10:20:17,094 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2021-01-06 10:20:17,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-01-06 10:20:17,095 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:20:17,095 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:20:17,308 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:20:17,309 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:20:17,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:20:17,311 INFO L82 PathProgramCache]: Analyzing trace with hash -1796312990, now seen corresponding path program 2 times [2021-01-06 10:20:17,312 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:20:17,312 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132852565] [2021-01-06 10:20:17,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:20:17,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:20:17,392 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:20:17,393 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132852565] [2021-01-06 10:20:17,394 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [950192138] [2021-01-06 10:20:17,394 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:20:17,463 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 10:20:17,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:20:17,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 5 conjunts are in the unsatisfiable core [2021-01-06 10:20:17,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:20:17,579 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:20:17,580 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:20:17,580 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-01-06 10:20:17,582 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597514982] [2021-01-06 10:20:17,582 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-01-06 10:20:17,583 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:20:17,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-01-06 10:20:17,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2021-01-06 10:20:17,584 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand 10 states. [2021-01-06 10:20:17,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:20:17,639 INFO L93 Difference]: Finished difference Result 56 states and 65 transitions. [2021-01-06 10:20:17,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-06 10:20:17,639 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 25 [2021-01-06 10:20:17,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:20:17,645 INFO L225 Difference]: With dead ends: 56 [2021-01-06 10:20:17,645 INFO L226 Difference]: Without dead ends: 33 [2021-01-06 10:20:17,646 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2021-01-06 10:20:17,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-01-06 10:20:17,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-01-06 10:20:17,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2021-01-06 10:20:17,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2021-01-06 10:20:17,663 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 25 [2021-01-06 10:20:17,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:20:17,663 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2021-01-06 10:20:17,663 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-01-06 10:20:17,664 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2021-01-06 10:20:17,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-01-06 10:20:17,665 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:20:17,666 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:20:17,879 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:20:17,880 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:20:17,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:20:17,881 INFO L82 PathProgramCache]: Analyzing trace with hash -1423570167, now seen corresponding path program 3 times [2021-01-06 10:20:17,882 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:20:17,882 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491153235] [2021-01-06 10:20:17,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:20:17,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:20:18,501 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:20:18,502 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491153235] [2021-01-06 10:20:18,503 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1004021598] [2021-01-06 10:20:18,503 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:20:18,577 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-01-06 10:20:18,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:20:18,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 20 conjunts are in the unsatisfiable core [2021-01-06 10:20:18,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:20:18,692 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 18 treesize of output 14 [2021-01-06 10:20:18,694 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:20:18,705 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:20:18,706 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:20:18,707 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:27 [2021-01-06 10:20:18,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:20:18,793 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 31 treesize of output 30 [2021-01-06 10:20:18,795 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:20:18,807 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:20:18,811 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-01-06 10:20:18,812 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:39 [2021-01-06 10:20:18,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:20:18,916 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:20:18,917 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 45 treesize of output 143 [2021-01-06 10:20:18,921 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:20:18,960 INFO L625 ElimStorePlain]: treesize reduction 56, result has 48.6 percent of original size [2021-01-06 10:20:18,964 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-01-06 10:20:18,964 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:57, output treesize:53 [2021-01-06 10:20:19,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:20:19,195 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:20:19,196 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 48 treesize of output 192 [2021-01-06 10:20:19,202 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:20:19,282 INFO L625 ElimStorePlain]: treesize reduction 78, result has 50.6 percent of original size [2021-01-06 10:20:19,286 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:20:19,292 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:20:19,294 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-01-06 10:20:19,295 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:62, output treesize:55 [2021-01-06 10:20:19,297 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:20:19,358 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2021-01-06 10:20:19,360 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 10:20:19,363 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:20:19,365 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2021-01-06 10:20:19,367 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:20:19,371 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 10:20:19,373 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:20:19,375 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2021-01-06 10:20:19,524 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:20:19,709 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:20:19,712 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:20:19,717 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 10:20:19,719 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2021-01-06 10:20:19,740 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 3 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:20:19,740 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:20:19,741 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 28 [2021-01-06 10:20:19,741 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246140854] [2021-01-06 10:20:19,741 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-01-06 10:20:19,742 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:20:19,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-01-06 10:20:19,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=644, Unknown=0, NotChecked=0, Total=756 [2021-01-06 10:20:19,743 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand 28 states. [2021-01-06 10:20:22,666 WARN L197 SmtUtils]: Spent 2.15 s on a formula simplification. DAG size of input: 72 DAG size of output: 42 [2021-01-06 10:20:38,917 WARN L197 SmtUtils]: Spent 16.14 s on a formula simplification. DAG size of input: 59 DAG size of output: 49 [2021-01-06 10:20:41,400 WARN L197 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 51 [2021-01-06 10:20:57,608 WARN L197 SmtUtils]: Spent 16.17 s on a formula simplification. DAG size of input: 63 DAG size of output: 48 [2021-01-06 10:21:13,916 WARN L197 SmtUtils]: Spent 16.19 s on a formula simplification. DAG size of input: 65 DAG size of output: 49 [2021-01-06 10:21:16,128 WARN L197 SmtUtils]: Spent 2.13 s on a formula simplification. DAG size of input: 68 DAG size of output: 40 [2021-01-06 10:21:30,667 WARN L197 SmtUtils]: Spent 14.49 s on a formula simplification. DAG size of input: 66 DAG size of output: 41 [2021-01-06 10:21:39,327 WARN L197 SmtUtils]: Spent 8.59 s on a formula simplification. DAG size of input: 62 DAG size of output: 36 [2021-01-06 10:21:49,810 WARN L197 SmtUtils]: Spent 10.42 s on a formula simplification. DAG size of input: 63 DAG size of output: 37 [2021-01-06 10:22:06,130 WARN L197 SmtUtils]: Spent 16.22 s on a formula simplification. DAG size of input: 59 DAG size of output: 46 [2021-01-06 10:22:06,328 WARN L197 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 41 [2021-01-06 10:22:06,525 WARN L197 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 42 [2021-01-06 10:22:27,590 WARN L197 SmtUtils]: Spent 20.90 s on a formula simplification. DAG size of input: 54 DAG size of output: 47 [2021-01-06 10:22:43,968 WARN L197 SmtUtils]: Spent 16.27 s on a formula simplification. DAG size of input: 55 DAG size of output: 48 [2021-01-06 10:23:00,323 WARN L197 SmtUtils]: Spent 16.26 s on a formula simplification. DAG size of input: 51 DAG size of output: 44 [2021-01-06 10:23:00,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:23:00,663 INFO L93 Difference]: Finished difference Result 133 states and 150 transitions. [2021-01-06 10:23:00,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-01-06 10:23:00,664 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 28 [2021-01-06 10:23:00,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:23:00,665 INFO L225 Difference]: With dead ends: 133 [2021-01-06 10:23:00,665 INFO L226 Difference]: Without dead ends: 123 [2021-01-06 10:23:00,668 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1147 ImplicationChecksByTransitivity, 159.0s TimeCoverageRelationStatistics Valid=730, Invalid=3302, Unknown=0, NotChecked=0, Total=4032 [2021-01-06 10:23:00,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-01-06 10:23:00,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 35. [2021-01-06 10:23:00,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2021-01-06 10:23:00,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2021-01-06 10:23:00,677 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 28 [2021-01-06 10:23:00,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:23:00,677 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2021-01-06 10:23:00,677 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2021-01-06 10:23:00,677 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2021-01-06 10:23:00,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-01-06 10:23:00,678 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:23:00,678 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:23:00,879 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:23:00,880 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:23:00,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:23:00,881 INFO L82 PathProgramCache]: Analyzing trace with hash -1580642084, now seen corresponding path program 1 times [2021-01-06 10:23:00,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:23:00,882 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044132063] [2021-01-06 10:23:00,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:23:00,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:23:01,480 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:23:01,481 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044132063] [2021-01-06 10:23:01,481 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [999040577] [2021-01-06 10:23:01,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:23:01,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:23:01,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 37 conjunts are in the unsatisfiable core [2021-01-06 10:23:01,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:23:01,615 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 18 treesize of output 14 [2021-01-06 10:23:01,616 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:23:01,625 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:23:01,626 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:23:01,626 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:29 [2021-01-06 10:23:01,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:23:01,721 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 31 treesize of output 30 [2021-01-06 10:23:01,726 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:23:01,737 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:23:01,740 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-01-06 10:23:01,740 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:39 [2021-01-06 10:23:01,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:23:01,911 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:23:01,911 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 113 [2021-01-06 10:23:01,918 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:23:01,964 INFO L625 ElimStorePlain]: treesize reduction 37, result has 60.6 percent of original size [2021-01-06 10:23:01,967 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 10:23:01,969 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:23:01,972 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:23:01,973 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2021-01-06 10:23:01,974 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:23:01,978 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 10:23:01,981 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-01-06 10:23:01,981 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:47, output treesize:57 [2021-01-06 10:23:01,983 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 10:23:01,984 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:23:01,985 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:23:01,986 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2021-01-06 10:23:01,988 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:23:01,991 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 10:23:02,112 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 10:23:02,113 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:23:02,115 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:23:02,116 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2021-01-06 10:23:02,116 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:23:02,122 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 10:23:02,238 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 10:23:02,239 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:23:02,241 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:23:02,242 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2021-01-06 10:23:02,243 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:23:02,245 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 10:23:02,345 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 10:23:02,347 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:23:02,348 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:23:02,349 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2021-01-06 10:23:02,349 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:23:02,351 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 10:23:02,456 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 10:23:02,457 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:23:02,459 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:23:02,460 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2021-01-06 10:23:02,460 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:23:02,463 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 10:23:02,553 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 10:23:02,554 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:23:02,555 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:23:02,557 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2021-01-06 10:23:02,557 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:23:02,559 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 10:23:14,792 WARN L197 SmtUtils]: Spent 12.17 s on a formula simplification that was a NOOP. DAG size: 40 [2021-01-06 10:23:15,333 WARN L197 SmtUtils]: Spent 354.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2021-01-06 10:23:15,341 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2021-01-06 10:23:15,642 WARN L197 SmtUtils]: Spent 220.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2021-01-06 10:23:15,653 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 3, 7, 1] term [2021-01-06 10:23:15,653 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2021-01-06 10:23:16,205 WARN L197 SmtUtils]: Spent 230.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2021-01-06 10:23:16,218 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 3, 6, 1] term [2021-01-06 10:23:16,218 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2021-01-06 10:23:16,952 WARN L197 SmtUtils]: Spent 663.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 54 [2021-01-06 10:23:17,003 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:23:17,004 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:23:17,004 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 28 [2021-01-06 10:23:17,004 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186297320] [2021-01-06 10:23:17,005 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-01-06 10:23:17,005 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:23:17,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-01-06 10:23:17,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=617, Unknown=0, NotChecked=0, Total=756 [2021-01-06 10:23:17,006 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand 28 states. [2021-01-06 10:23:19,090 WARN L197 SmtUtils]: Spent 1.63 s on a formula simplification. DAG size of input: 60 DAG size of output: 45 [2021-01-06 10:23:20,142 WARN L197 SmtUtils]: Spent 782.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 39 [2021-01-06 10:23:20,704 WARN L197 SmtUtils]: Spent 454.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 45 [2021-01-06 10:23:21,737 WARN L197 SmtUtils]: Spent 984.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 48 [2021-01-06 10:23:22,475 WARN L197 SmtUtils]: Spent 688.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 47 [2021-01-06 10:23:23,229 WARN L197 SmtUtils]: Spent 675.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 47 [2021-01-06 10:23:23,688 WARN L197 SmtUtils]: Spent 383.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 48 [2021-01-06 10:23:25,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:23:25,032 INFO L93 Difference]: Finished difference Result 132 states and 148 transitions. [2021-01-06 10:23:25,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-01-06 10:23:25,033 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 34 [2021-01-06 10:23:25,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:23:25,035 INFO L225 Difference]: With dead ends: 132 [2021-01-06 10:23:25,035 INFO L226 Difference]: Without dead ends: 122 [2021-01-06 10:23:25,043 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 17 SyntacticMatches, 8 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1125 ImplicationChecksByTransitivity, 22.1s TimeCoverageRelationStatistics Valid=648, Invalid=2774, Unknown=0, NotChecked=0, Total=3422 [2021-01-06 10:23:25,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-01-06 10:23:25,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 41. [2021-01-06 10:23:25,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2021-01-06 10:23:25,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2021-01-06 10:23:25,072 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 34 [2021-01-06 10:23:25,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:23:25,073 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2021-01-06 10:23:25,073 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2021-01-06 10:23:25,075 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2021-01-06 10:23:25,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-01-06 10:23:25,076 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:23:25,080 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:23:25,293 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-01-06 10:23:25,294 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:23:25,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:23:25,295 INFO L82 PathProgramCache]: Analyzing trace with hash 2045226095, now seen corresponding path program 2 times [2021-01-06 10:23:25,296 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:23:25,296 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487481835] [2021-01-06 10:23:25,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:23:25,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:23:25,649 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 13 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:23:25,649 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487481835] [2021-01-06 10:23:25,649 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2004122871] [2021-01-06 10:23:25,650 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:23:25,713 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 10:23:25,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:23:25,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 21 conjunts are in the unsatisfiable core [2021-01-06 10:23:25,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:23:25,808 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 18 treesize of output 14 [2021-01-06 10:23:25,810 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:23:25,821 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:23:25,822 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:23:25,823 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:24 [2021-01-06 10:23:25,894 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:23:25,895 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 57 [2021-01-06 10:23:25,897 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:23:25,917 INFO L625 ElimStorePlain]: treesize reduction 22, result has 56.0 percent of original size [2021-01-06 10:23:25,918 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-01-06 10:23:25,919 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:32, output treesize:28 [2021-01-06 10:23:26,170 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:23:26,172 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:23:26,176 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 10:23:26,177 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2021-01-06 10:23:26,194 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 4 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:23:26,194 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:23:26,195 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 26 [2021-01-06 10:23:26,195 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840308141] [2021-01-06 10:23:26,195 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-01-06 10:23:26,196 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:23:26,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-01-06 10:23:26,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=529, Unknown=0, NotChecked=0, Total=650 [2021-01-06 10:23:26,197 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand 26 states. [2021-01-06 10:23:27,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:23:27,193 INFO L93 Difference]: Finished difference Result 133 states and 148 transitions. [2021-01-06 10:23:27,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-01-06 10:23:27,194 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 40 [2021-01-06 10:23:27,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:23:27,195 INFO L225 Difference]: With dead ends: 133 [2021-01-06 10:23:27,195 INFO L226 Difference]: Without dead ends: 99 [2021-01-06 10:23:27,198 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 531 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=315, Invalid=1491, Unknown=0, NotChecked=0, Total=1806 [2021-01-06 10:23:27,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-01-06 10:23:27,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 63. [2021-01-06 10:23:27,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2021-01-06 10:23:27,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 69 transitions. [2021-01-06 10:23:27,215 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 69 transitions. Word has length 40 [2021-01-06 10:23:27,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:23:27,215 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 69 transitions. [2021-01-06 10:23:27,215 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2021-01-06 10:23:27,215 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 69 transitions. [2021-01-06 10:23:27,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-01-06 10:23:27,216 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:23:27,217 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:23:27,430 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:23:27,431 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:23:27,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:23:27,432 INFO L82 PathProgramCache]: Analyzing trace with hash 2060045762, now seen corresponding path program 3 times [2021-01-06 10:23:27,432 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:23:27,433 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649820196] [2021-01-06 10:23:27,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:23:27,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:23:27,874 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-01-06 10:23:27,875 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649820196] [2021-01-06 10:23:27,875 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1225423678] [2021-01-06 10:23:27,875 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:23:27,942 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-01-06 10:23:27,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:23:27,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 36 conjunts are in the unsatisfiable core [2021-01-06 10:23:27,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:23:27,996 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-01-06 10:23:27,997 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:23:28,002 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:23:28,003 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:23:28,003 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:16 [2021-01-06 10:23:28,570 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:23:28,571 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2021-01-06 10:23:28,610 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 3 proven. 38 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-01-06 10:23:28,611 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:23:28,611 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 26 [2021-01-06 10:23:28,611 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146090807] [2021-01-06 10:23:28,612 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-01-06 10:23:28,612 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:23:28,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-01-06 10:23:28,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=564, Unknown=0, NotChecked=0, Total=650 [2021-01-06 10:23:28,613 INFO L87 Difference]: Start difference. First operand 63 states and 69 transitions. Second operand 26 states. [2021-01-06 10:23:30,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:23:30,532 INFO L93 Difference]: Finished difference Result 110 states and 120 transitions. [2021-01-06 10:23:30,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-01-06 10:23:30,532 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 46 [2021-01-06 10:23:30,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:23:30,534 INFO L225 Difference]: With dead ends: 110 [2021-01-06 10:23:30,534 INFO L226 Difference]: Without dead ends: 108 [2021-01-06 10:23:30,536 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 706 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=425, Invalid=2125, Unknown=0, NotChecked=0, Total=2550 [2021-01-06 10:23:30,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-01-06 10:23:30,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 77. [2021-01-06 10:23:30,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2021-01-06 10:23:30,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 84 transitions. [2021-01-06 10:23:30,555 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 84 transitions. Word has length 46 [2021-01-06 10:23:30,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:23:30,556 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 84 transitions. [2021-01-06 10:23:30,556 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2021-01-06 10:23:30,556 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 84 transitions. [2021-01-06 10:23:30,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-01-06 10:23:30,561 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:23:30,562 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:23:30,777 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:23:30,778 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:23:30,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:23:30,779 INFO L82 PathProgramCache]: Analyzing trace with hash -1636539179, now seen corresponding path program 4 times [2021-01-06 10:23:30,779 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:23:30,780 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457784779] [2021-01-06 10:23:30,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:23:30,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:23:31,194 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 33 proven. 20 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-01-06 10:23:31,195 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457784779] [2021-01-06 10:23:31,195 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [210958868] [2021-01-06 10:23:31,195 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:23:31,248 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 10:23:31,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:23:31,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 10:23:31,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:23:31,642 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 52 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-01-06 10:23:31,642 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:23:31,642 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-06 10:23:31,643 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880920606] [2021-01-06 10:23:31,643 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-06 10:23:31,643 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:23:31,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-06 10:23:31,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=304, Unknown=0, NotChecked=0, Total=420 [2021-01-06 10:23:31,644 INFO L87 Difference]: Start difference. First operand 77 states and 84 transitions. Second operand 21 states. [2021-01-06 10:23:31,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:23:31,919 INFO L93 Difference]: Finished difference Result 110 states and 120 transitions. [2021-01-06 10:23:31,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-01-06 10:23:31,919 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 52 [2021-01-06 10:23:31,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:23:31,920 INFO L225 Difference]: With dead ends: 110 [2021-01-06 10:23:31,920 INFO L226 Difference]: Without dead ends: 74 [2021-01-06 10:23:31,921 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=166, Invalid=434, Unknown=0, NotChecked=0, Total=600 [2021-01-06 10:23:31,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-01-06 10:23:31,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 56. [2021-01-06 10:23:31,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2021-01-06 10:23:31,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 61 transitions. [2021-01-06 10:23:31,932 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 61 transitions. Word has length 52 [2021-01-06 10:23:31,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:23:31,933 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 61 transitions. [2021-01-06 10:23:31,933 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2021-01-06 10:23:31,933 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 61 transitions. [2021-01-06 10:23:31,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-01-06 10:23:31,934 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:23:31,934 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 6, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:23:32,140 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-01-06 10:23:32,141 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:23:32,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:23:32,142 INFO L82 PathProgramCache]: Analyzing trace with hash 1725228255, now seen corresponding path program 5 times [2021-01-06 10:23:32,142 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:23:32,142 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869384163] [2021-01-06 10:23:32,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:23:32,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:23:32,885 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 3 proven. 116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:23:32,885 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869384163] [2021-01-06 10:23:32,885 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [448527214] [2021-01-06 10:23:32,885 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:23:32,983 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-01-06 10:23:32,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:23:32,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 27 conjunts are in the unsatisfiable core [2021-01-06 10:23:32,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:23:33,037 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 18 treesize of output 14 [2021-01-06 10:23:33,038 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:23:33,044 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:23:33,045 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:23:33,046 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:21 [2021-01-06 10:23:33,163 INFO L348 Elim1Store]: treesize reduction 55, result has 21.4 percent of original size [2021-01-06 10:23:33,164 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 36 treesize of output 35 [2021-01-06 10:23:33,166 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:23:33,185 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:23:33,188 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-01-06 10:23:33,189 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:48, output treesize:44 [2021-01-06 10:23:33,511 INFO L348 Elim1Store]: treesize reduction 18, result has 86.5 percent of original size [2021-01-06 10:23:33,512 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 45 treesize of output 137 [2021-01-06 10:23:33,515 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:23:33,572 INFO L625 ElimStorePlain]: treesize reduction 82, result has 40.6 percent of original size [2021-01-06 10:23:33,574 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-01-06 10:23:33,574 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:60, output treesize:56 [2021-01-06 10:23:33,913 WARN L197 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 52 [2021-01-06 10:23:33,914 INFO L348 Elim1Store]: treesize reduction 18, result has 92.4 percent of original size [2021-01-06 10:23:33,915 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 59 treesize of output 245 [2021-01-06 10:23:33,921 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:23:34,006 INFO L625 ElimStorePlain]: treesize reduction 151, result has 33.2 percent of original size [2021-01-06 10:23:34,009 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-01-06 10:23:34,010 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:79, output treesize:75 [2021-01-06 10:23:34,506 WARN L197 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 75 [2021-01-06 10:23:34,507 INFO L348 Elim1Store]: treesize reduction 18, result has 95.1 percent of original size [2021-01-06 10:23:34,507 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 73 treesize of output 375 [2021-01-06 10:23:34,517 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:23:34,634 WARN L197 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 48 [2021-01-06 10:23:34,635 INFO L625 ElimStorePlain]: treesize reduction 232, result has 28.8 percent of original size [2021-01-06 10:23:34,640 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-01-06 10:23:34,640 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:98, output treesize:94 [2021-01-06 10:23:35,445 WARN L197 SmtUtils]: Spent 395.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 103 [2021-01-06 10:23:35,449 INFO L348 Elim1Store]: treesize reduction 18, result has 96.5 percent of original size [2021-01-06 10:23:35,450 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 15 case distinctions, treesize of input 87 treesize of output 527 [2021-01-06 10:23:35,462 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:23:35,626 WARN L197 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 55 [2021-01-06 10:23:35,627 INFO L625 ElimStorePlain]: treesize reduction 325, result has 25.8 percent of original size [2021-01-06 10:23:35,641 INFO L547 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-2 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2021-01-06 10:23:35,642 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:117, output treesize:113 [2021-01-06 10:23:37,713 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:23:37,716 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 10:23:37,728 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2021-01-06 10:23:37,730 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 7 disjuncts [2021-01-06 10:23:37,739 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2021-01-06 10:23:37,741 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 7 disjuncts [2021-01-06 10:23:37,743 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 13 disjuncts [2021-01-06 10:23:37,809 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 32 proven. 80 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-01-06 10:23:37,809 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:23:37,810 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 21] total 42 [2021-01-06 10:23:37,810 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951023347] [2021-01-06 10:23:37,810 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2021-01-06 10:23:37,810 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:23:37,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-01-06 10:23:37,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=332, Invalid=1390, Unknown=0, NotChecked=0, Total=1722 [2021-01-06 10:23:37,812 INFO L87 Difference]: Start difference. First operand 56 states and 61 transitions. Second operand 42 states. [2021-01-06 10:23:39,910 WARN L197 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 57 [2021-01-06 10:23:50,831 WARN L197 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 74 DAG size of output: 73 [2021-01-06 10:23:51,124 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 71 [2021-01-06 10:24:09,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:24:09,275 INFO L93 Difference]: Finished difference Result 144 states and 164 transitions. [2021-01-06 10:24:09,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-01-06 10:24:09,276 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 55 [2021-01-06 10:24:09,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:24:09,277 INFO L225 Difference]: With dead ends: 144 [2021-01-06 10:24:09,277 INFO L226 Difference]: Without dead ends: 110 [2021-01-06 10:24:09,280 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2321 ImplicationChecksByTransitivity, 23.3s TimeCoverageRelationStatistics Valid=1090, Invalid=5878, Unknown=4, NotChecked=0, Total=6972 [2021-01-06 10:24:09,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-01-06 10:24:09,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 68. [2021-01-06 10:24:09,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2021-01-06 10:24:09,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 73 transitions. [2021-01-06 10:24:09,296 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 73 transitions. Word has length 55 [2021-01-06 10:24:09,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:24:09,296 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 73 transitions. [2021-01-06 10:24:09,296 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2021-01-06 10:24:09,296 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 73 transitions. [2021-01-06 10:24:09,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-01-06 10:24:09,297 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:24:09,297 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 6, 5, 5, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:24:09,510 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:24:09,513 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:24:09,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:24:09,513 INFO L82 PathProgramCache]: Analyzing trace with hash -1834977979, now seen corresponding path program 6 times [2021-01-06 10:24:09,514 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:24:09,514 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591992499] [2021-01-06 10:24:09,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:24:09,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:24:10,527 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 30 proven. 115 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-01-06 10:24:10,528 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591992499] [2021-01-06 10:24:10,528 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1976703165] [2021-01-06 10:24:10,528 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:24:10,633 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-01-06 10:24:10,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:24:10,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 28 conjunts are in the unsatisfiable core [2021-01-06 10:24:10,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:24:10,740 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 18 treesize of output 14 [2021-01-06 10:24:10,742 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:24:10,751 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:24:10,752 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:24:10,753 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:24 [2021-01-06 10:24:10,834 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:24:10,834 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 31 treesize of output 75 [2021-01-06 10:24:10,836 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:24:10,866 INFO L625 ElimStorePlain]: treesize reduction 25, result has 59.0 percent of original size [2021-01-06 10:24:10,868 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-01-06 10:24:10,868 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:36 [2021-01-06 10:24:10,978 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:24:10,978 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 45 treesize of output 163 [2021-01-06 10:24:10,981 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:24:11,024 INFO L625 ElimStorePlain]: treesize reduction 66, result has 43.1 percent of original size [2021-01-06 10:24:11,025 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-01-06 10:24:11,026 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:54, output treesize:50 [2021-01-06 10:24:11,268 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:24:11,268 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 50 treesize of output 217 [2021-01-06 10:24:11,273 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:24:11,358 INFO L625 ElimStorePlain]: treesize reduction 90, result has 46.7 percent of original size [2021-01-06 10:24:11,361 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:24:11,362 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:24:11,363 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-01-06 10:24:11,364 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:61, output treesize:54 [2021-01-06 10:24:11,365 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:24:11,436 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2021-01-06 10:24:11,437 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 10:24:11,439 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:24:11,439 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2021-01-06 10:24:11,440 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:24:11,442 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 10:24:11,444 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:24:11,445 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2021-01-06 10:24:11,716 WARN L197 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2021-01-06 10:24:11,722 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:24:12,270 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:24:12,273 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:24:12,276 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 10:24:12,277 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2021-01-06 10:24:12,358 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 11 proven. 124 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-01-06 10:24:12,359 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:24:12,359 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 20] total 37 [2021-01-06 10:24:12,359 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709944709] [2021-01-06 10:24:12,360 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-01-06 10:24:12,360 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:24:12,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-01-06 10:24:12,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=1158, Unknown=0, NotChecked=0, Total=1332 [2021-01-06 10:24:12,361 INFO L87 Difference]: Start difference. First operand 68 states and 73 transitions. Second operand 37 states. [2021-01-06 10:24:17,694 WARN L197 SmtUtils]: Spent 4.07 s on a formula simplification. DAG size of input: 66 DAG size of output: 37 [2021-01-06 10:24:23,971 WARN L197 SmtUtils]: Spent 6.19 s on a formula simplification. DAG size of input: 76 DAG size of output: 39 [2021-01-06 10:24:30,291 WARN L197 SmtUtils]: Spent 6.13 s on a formula simplification. DAG size of input: 76 DAG size of output: 47