/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/reducercommutativity/sep40-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-dcfa08f [2020-12-23 00:26:10,673 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-23 00:26:10,675 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-23 00:26:10,709 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-23 00:26:10,709 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-23 00:26:10,711 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-23 00:26:10,712 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-23 00:26:10,715 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-23 00:26:10,717 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-23 00:26:10,718 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-23 00:26:10,731 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-23 00:26:10,733 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2020-12-23 00:26:10,794 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-23 00:26:10,838 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-23 00:26:10,838 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-23 00:26:10,842 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-23 00:26:10,842 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-23 00:26:10,842 INFO L138 SettingsManager]: * Use SBE=true [2020-12-23 00:26:10,842 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-23 00:26:10,843 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-23 00:26:10,843 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-23 00:26:10,843 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-23 00:26:10,843 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-23 00:26:10,843 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-23 00:26:10,844 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-23 00:26:10,844 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-23 00:26:10,844 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-23 00:26:10,845 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-23 00:26:10,845 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-23 00:26:10,846 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-23 00:26:10,846 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 00:26:10,846 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-23 00:26:10,848 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-23 00:26:10,848 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-23 00:26:10,849 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-23 00:26:10,849 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-23 00:26:10,853 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-23 00:26:10,853 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-23 00:26:10,854 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-23 00:26:11,213 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-23 00:26:11,242 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-23 00:26:11,246 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-23 00:26:11,247 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-23 00:26:11,248 INFO L275 PluginConnector]: CDTParser initialized [2020-12-23 00:26:11,249 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/reducercommutativity/sep40-1.i [2020-12-23 00:26:11,338 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/12e9e8cd2/8e58369c48274251a78dda509991eb35/FLAGd8d1a7574 [2020-12-23 00:26:11,981 INFO L306 CDTParser]: Found 1 translation units. [2020-12-23 00:26:11,982 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/reducercommutativity/sep40-1.i [2020-12-23 00:26:11,992 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/12e9e8cd2/8e58369c48274251a78dda509991eb35/FLAGd8d1a7574 [2020-12-23 00:26:12,342 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/12e9e8cd2/8e58369c48274251a78dda509991eb35 [2020-12-23 00:26:12,352 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-23 00:26:12,354 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-23 00:26:12,356 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-23 00:26:12,357 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-23 00:26:12,360 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-23 00:26:12,361 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 12:26:12" (1/1) ... [2020-12-23 00:26:12,363 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4b2c38b7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:26:12, skipping insertion in model container [2020-12-23 00:26:12,364 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 12:26:12" (1/1) ... [2020-12-23 00:26:12,372 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-23 00:26:12,392 INFO L178 MainTranslator]: Built tables and reachable declarations left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~x~0,],[IdentifierExpression[~i~1,]]] left hand side expression in assignment: lhs: VariableLHS[~ret~1,] left hand side expression in assignment: lhs: VariableLHS[~temp~0,] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~x~0,],[IntegerLiteral[0]]] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~x~0,],[IntegerLiteral[1]]] left hand side expression in assignment: lhs: VariableLHS[~ret2~0,] left hand side expression in assignment: lhs: VariableLHS[~temp~0,] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~x~0,],[IdentifierExpression[~i~2,]]] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~x~0,],[IntegerLiteral[39]]] left hand side expression in assignment: lhs: VariableLHS[~ret5~0,] [2020-12-23 00:26:12,588 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/reducercommutativity/sep40-1.i[1293,1306] [2020-12-23 00:26:12,593 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 00:26:12,605 INFO L203 MainTranslator]: Completed pre-run left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#x~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#x~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~1,]]]]] left hand side expression in assignment: lhs: VariableLHS[~ret~1,] left hand side expression in assignment: lhs: VariableLHS[~temp~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#x~0,],base],StructAccessExpression[IdentifierExpression[~#x~0,],offset]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#x~0,],base],BinaryExpression[ARITHPLUS,IntegerLiteral[4],StructAccessExpression[IdentifierExpression[~#x~0,],offset]]]] left hand side expression in assignment: lhs: VariableLHS[~ret2~0,] left hand side expression in assignment: lhs: VariableLHS[~temp~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#x~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#x~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~2,]]]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#x~0,],base],BinaryExpression[ARITHPLUS,IntegerLiteral[156],StructAccessExpression[IdentifierExpression[~#x~0,],offset]]]] left hand side expression in assignment: lhs: VariableLHS[~ret5~0,] [2020-12-23 00:26:12,631 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/reducercommutativity/sep40-1.i[1293,1306] [2020-12-23 00:26:12,633 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 00:26:12,649 INFO L208 MainTranslator]: Completed translation [2020-12-23 00:26:12,649 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:26:12 WrapperNode [2020-12-23 00:26:12,650 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-23 00:26:12,651 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-23 00:26:12,651 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-23 00:26:12,651 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-23 00:26:12,661 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:26:12" (1/1) ... [2020-12-23 00:26:12,669 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:26:12" (1/1) ... [2020-12-23 00:26:12,716 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-23 00:26:12,717 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-23 00:26:12,717 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-23 00:26:12,717 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-23 00:26:12,730 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:26:12" (1/1) ... [2020-12-23 00:26:12,730 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:26:12" (1/1) ... [2020-12-23 00:26:12,739 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:26:12" (1/1) ... [2020-12-23 00:26:12,739 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:26:12" (1/1) ... [2020-12-23 00:26:12,763 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:26:12" (1/1) ... [2020-12-23 00:26:12,769 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:26:12" (1/1) ... [2020-12-23 00:26:12,776 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:26:12" (1/1) ... [2020-12-23 00:26:12,784 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-23 00:26:12,785 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-23 00:26:12,786 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-23 00:26:12,786 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-23 00:26:12,787 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:26:12" (1/1) ... No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 00:26:12,876 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-23 00:26:12,876 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-23 00:26:12,877 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-23 00:26:12,877 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-23 00:26:12,877 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-23 00:26:12,877 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-23 00:26:12,877 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-23 00:26:13,488 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-23 00:26:13,488 INFO L299 CfgBuilder]: Removed 15 assume(true) statements. [2020-12-23 00:26:13,497 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 12:26:13 BoogieIcfgContainer [2020-12-23 00:26:13,497 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-23 00:26:13,499 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-23 00:26:13,499 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-23 00:26:13,505 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-23 00:26:13,505 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.12 12:26:12" (1/3) ... [2020-12-23 00:26:13,518 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3153630c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 12:26:13, skipping insertion in model container [2020-12-23 00:26:13,518 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:26:12" (2/3) ... [2020-12-23 00:26:13,519 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3153630c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 12:26:13, skipping insertion in model container [2020-12-23 00:26:13,519 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 12:26:13" (3/3) ... [2020-12-23 00:26:13,521 INFO L111 eAbstractionObserver]: Analyzing ICFG sep40-1.i [2020-12-23 00:26:13,538 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-23 00:26:13,545 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-23 00:26:13,565 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-23 00:26:13,593 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-23 00:26:13,593 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-23 00:26:13,594 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-23 00:26:13,594 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-23 00:26:13,594 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-23 00:26:13,594 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-23 00:26:13,594 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-23 00:26:13,594 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-23 00:26:13,609 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states. [2020-12-23 00:26:13,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-23 00:26:13,615 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:26:13,616 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:26:13,616 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:26:13,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:26:13,622 INFO L82 PathProgramCache]: Analyzing trace with hash -23080620, now seen corresponding path program 1 times [2020-12-23 00:26:13,632 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:26:13,633 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661595464] [2020-12-23 00:26:13,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:26:13,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:26:13,794 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:26:13,795 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661595464] [2020-12-23 00:26:13,795 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 00:26:13,796 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-23 00:26:13,797 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157353478] [2020-12-23 00:26:13,801 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-23 00:26:13,801 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:26:13,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-23 00:26:13,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-23 00:26:13,818 INFO L87 Difference]: Start difference. First operand 30 states. Second operand 2 states. [2020-12-23 00:26:13,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:26:13,839 INFO L93 Difference]: Finished difference Result 56 states and 80 transitions. [2020-12-23 00:26:13,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-23 00:26:13,841 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 17 [2020-12-23 00:26:13,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:26:13,851 INFO L225 Difference]: With dead ends: 56 [2020-12-23 00:26:13,851 INFO L226 Difference]: Without dead ends: 26 [2020-12-23 00:26:13,854 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-23 00:26:13,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-12-23 00:26:13,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-12-23 00:26:13,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-12-23 00:26:13,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 33 transitions. [2020-12-23 00:26:13,891 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 33 transitions. Word has length 17 [2020-12-23 00:26:13,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:26:13,891 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 33 transitions. [2020-12-23 00:26:13,891 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-23 00:26:13,891 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 33 transitions. [2020-12-23 00:26:13,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-23 00:26:13,892 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:26:13,892 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:26:13,893 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-23 00:26:13,893 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:26:13,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:26:13,894 INFO L82 PathProgramCache]: Analyzing trace with hash 1060874985, now seen corresponding path program 1 times [2020-12-23 00:26:13,894 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:26:13,895 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778551061] [2020-12-23 00:26:13,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:26:13,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:26:13,995 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:26:13,998 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778551061] [2020-12-23 00:26:13,998 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 00:26:13,998 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 00:26:13,999 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256803597] [2020-12-23 00:26:14,001 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 00:26:14,002 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:26:14,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 00:26:14,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 00:26:14,003 INFO L87 Difference]: Start difference. First operand 26 states and 33 transitions. Second operand 3 states. [2020-12-23 00:26:14,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:26:14,045 INFO L93 Difference]: Finished difference Result 50 states and 64 transitions. [2020-12-23 00:26:14,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 00:26:14,046 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-12-23 00:26:14,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:26:14,048 INFO L225 Difference]: With dead ends: 50 [2020-12-23 00:26:14,048 INFO L226 Difference]: Without dead ends: 28 [2020-12-23 00:26:14,050 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 00:26:14,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-12-23 00:26:14,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2020-12-23 00:26:14,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-12-23 00:26:14,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 34 transitions. [2020-12-23 00:26:14,061 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 34 transitions. Word has length 17 [2020-12-23 00:26:14,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:26:14,061 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 34 transitions. [2020-12-23 00:26:14,062 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 00:26:14,062 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 34 transitions. [2020-12-23 00:26:14,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-12-23 00:26:14,063 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:26:14,064 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:26:14,064 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-23 00:26:14,064 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:26:14,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:26:14,066 INFO L82 PathProgramCache]: Analyzing trace with hash -507200985, now seen corresponding path program 1 times [2020-12-23 00:26:14,067 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:26:14,067 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134245442] [2020-12-23 00:26:14,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:26:14,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:26:14,109 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:26:14,110 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134245442] [2020-12-23 00:26:14,110 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1782855967] [2020-12-23 00:26:14,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:26:14,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:26:14,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 2 conjunts are in the unsatisfiable core [2020-12-23 00:26:14,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:26:14,229 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 00:26:14,230 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:26:14,230 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2020-12-23 00:26:14,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99336540] [2020-12-23 00:26:14,231 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 00:26:14,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:26:14,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 00:26:14,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-23 00:26:14,232 INFO L87 Difference]: Start difference. First operand 27 states and 34 transitions. Second operand 3 states. [2020-12-23 00:26:14,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:26:14,264 INFO L93 Difference]: Finished difference Result 54 states and 71 transitions. [2020-12-23 00:26:14,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 00:26:14,265 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-12-23 00:26:14,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:26:14,266 INFO L225 Difference]: With dead ends: 54 [2020-12-23 00:26:14,266 INFO L226 Difference]: Without dead ends: 36 [2020-12-23 00:26:14,267 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-23 00:26:14,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-12-23 00:26:14,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 30. [2020-12-23 00:26:14,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-12-23 00:26:14,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2020-12-23 00:26:14,273 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 19 [2020-12-23 00:26:14,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:26:14,273 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2020-12-23 00:26:14,274 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 00:26:14,274 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2020-12-23 00:26:14,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-12-23 00:26:14,275 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:26:14,275 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:26:14,489 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-12-23 00:26:14,490 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:26:14,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:26:14,492 INFO L82 PathProgramCache]: Analyzing trace with hash 1833868074, now seen corresponding path program 1 times [2020-12-23 00:26:14,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:26:14,493 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328885092] [2020-12-23 00:26:14,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:26:14,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:26:14,540 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-23 00:26:14,540 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328885092] [2020-12-23 00:26:14,541 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [906279581] [2020-12-23 00:26:14,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:26:14,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:26:14,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 2 conjunts are in the unsatisfiable core [2020-12-23 00:26:14,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:26:14,660 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-23 00:26:14,661 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:26:14,661 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2020-12-23 00:26:14,662 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555248137] [2020-12-23 00:26:14,662 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 00:26:14,662 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:26:14,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 00:26:14,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-23 00:26:14,664 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 3 states. [2020-12-23 00:26:14,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:26:14,678 INFO L93 Difference]: Finished difference Result 42 states and 51 transitions. [2020-12-23 00:26:14,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 00:26:14,678 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 28 [2020-12-23 00:26:14,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:26:14,679 INFO L225 Difference]: With dead ends: 42 [2020-12-23 00:26:14,680 INFO L226 Difference]: Without dead ends: 32 [2020-12-23 00:26:14,680 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-23 00:26:14,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-12-23 00:26:14,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2020-12-23 00:26:14,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-12-23 00:26:14,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 38 transitions. [2020-12-23 00:26:14,686 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 38 transitions. Word has length 28 [2020-12-23 00:26:14,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:26:14,687 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 38 transitions. [2020-12-23 00:26:14,687 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 00:26:14,687 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 38 transitions. [2020-12-23 00:26:14,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-12-23 00:26:14,688 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:26:14,688 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:26:14,902 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:26:14,903 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:26:14,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:26:14,905 INFO L82 PathProgramCache]: Analyzing trace with hash -1777663060, now seen corresponding path program 1 times [2020-12-23 00:26:14,906 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:26:14,907 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220199159] [2020-12-23 00:26:14,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:26:14,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:26:14,946 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-23 00:26:14,947 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220199159] [2020-12-23 00:26:14,947 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [60575051] [2020-12-23 00:26:14,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:26:15,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:26:15,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-23 00:26:15,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:26:15,121 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-23 00:26:15,121 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:26:15,122 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-12-23 00:26:15,122 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278480979] [2020-12-23 00:26:15,122 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 00:26:15,123 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:26:15,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 00:26:15,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-23 00:26:15,127 INFO L87 Difference]: Start difference. First operand 31 states and 38 transitions. Second operand 5 states. [2020-12-23 00:26:15,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:26:15,161 INFO L93 Difference]: Finished difference Result 60 states and 74 transitions. [2020-12-23 00:26:15,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 00:26:15,162 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 30 [2020-12-23 00:26:15,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:26:15,164 INFO L225 Difference]: With dead ends: 60 [2020-12-23 00:26:15,164 INFO L226 Difference]: Without dead ends: 34 [2020-12-23 00:26:15,165 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-23 00:26:15,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-12-23 00:26:15,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2020-12-23 00:26:15,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-12-23 00:26:15,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 40 transitions. [2020-12-23 00:26:15,180 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 40 transitions. Word has length 30 [2020-12-23 00:26:15,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:26:15,181 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 40 transitions. [2020-12-23 00:26:15,181 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 00:26:15,181 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 40 transitions. [2020-12-23 00:26:15,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-12-23 00:26:15,183 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:26:15,183 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:26:15,396 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:26:15,397 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:26:15,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:26:15,398 INFO L82 PathProgramCache]: Analyzing trace with hash -861329106, now seen corresponding path program 2 times [2020-12-23 00:26:15,399 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:26:15,399 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347333062] [2020-12-23 00:26:15,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:26:15,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:26:15,452 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-23 00:26:15,452 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347333062] [2020-12-23 00:26:15,453 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1246909364] [2020-12-23 00:26:15,453 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 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:26:15,530 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 00:26:15,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:26:15,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-23 00:26:15,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:26:15,599 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-23 00:26:15,599 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:26:15,600 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 7 [2020-12-23 00:26:15,600 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506198475] [2020-12-23 00:26:15,600 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-23 00:26:15,601 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:26:15,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-23 00:26:15,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-23 00:26:15,602 INFO L87 Difference]: Start difference. First operand 33 states and 40 transitions. Second operand 7 states. [2020-12-23 00:26:15,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:26:15,665 INFO L93 Difference]: Finished difference Result 77 states and 100 transitions. [2020-12-23 00:26:15,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-23 00:26:15,666 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 32 [2020-12-23 00:26:15,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:26:15,667 INFO L225 Difference]: With dead ends: 77 [2020-12-23 00:26:15,667 INFO L226 Difference]: Without dead ends: 51 [2020-12-23 00:26:15,667 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-23 00:26:15,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-12-23 00:26:15,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 44. [2020-12-23 00:26:15,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-12-23 00:26:15,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 54 transitions. [2020-12-23 00:26:15,673 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 54 transitions. Word has length 32 [2020-12-23 00:26:15,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:26:15,673 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 54 transitions. [2020-12-23 00:26:15,673 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-23 00:26:15,674 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 54 transitions. [2020-12-23 00:26:15,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-12-23 00:26:15,675 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:26:15,675 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:26:15,889 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:26:15,890 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:26:15,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:26:15,892 INFO L82 PathProgramCache]: Analyzing trace with hash -1600422655, now seen corresponding path program 3 times [2020-12-23 00:26:15,892 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:26:15,893 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481115270] [2020-12-23 00:26:15,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:26:15,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:26:15,967 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-12-23 00:26:15,968 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481115270] [2020-12-23 00:26:15,968 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [614316418] [2020-12-23 00:26:15,968 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 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:26:16,038 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-23 00:26:16,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:26:16,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-23 00:26:16,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:26:16,078 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-12-23 00:26:16,078 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:26:16,079 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-12-23 00:26:16,079 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281623516] [2020-12-23 00:26:16,079 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 00:26:16,080 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:26:16,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 00:26:16,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-23 00:26:16,081 INFO L87 Difference]: Start difference. First operand 44 states and 54 transitions. Second operand 5 states. [2020-12-23 00:26:16,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:26:16,096 INFO L93 Difference]: Finished difference Result 60 states and 73 transitions. [2020-12-23 00:26:16,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 00:26:16,096 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 43 [2020-12-23 00:26:16,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:26:16,097 INFO L225 Difference]: With dead ends: 60 [2020-12-23 00:26:16,097 INFO L226 Difference]: Without dead ends: 47 [2020-12-23 00:26:16,098 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-23 00:26:16,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-12-23 00:26:16,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2020-12-23 00:26:16,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-12-23 00:26:16,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 56 transitions. [2020-12-23 00:26:16,103 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 56 transitions. Word has length 43 [2020-12-23 00:26:16,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:26:16,104 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 56 transitions. [2020-12-23 00:26:16,104 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 00:26:16,104 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 56 transitions. [2020-12-23 00:26:16,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-12-23 00:26:16,105 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:26:16,105 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:26:16,319 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-12-23 00:26:16,320 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:26:16,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:26:16,321 INFO L82 PathProgramCache]: Analyzing trace with hash 477657599, now seen corresponding path program 4 times [2020-12-23 00:26:16,322 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:26:16,322 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115415774] [2020-12-23 00:26:16,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:26:16,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:26:16,394 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2020-12-23 00:26:16,394 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115415774] [2020-12-23 00:26:16,395 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1263735176] [2020-12-23 00:26:16,395 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 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:26:16,470 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 00:26:16,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:26:16,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-23 00:26:16,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:26:16,540 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2020-12-23 00:26:16,540 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:26:16,540 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-12-23 00:26:16,540 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316202777] [2020-12-23 00:26:16,541 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-23 00:26:16,541 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:26:16,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-23 00:26:16,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-23 00:26:16,542 INFO L87 Difference]: Start difference. First operand 46 states and 56 transitions. Second operand 7 states. [2020-12-23 00:26:16,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:26:16,562 INFO L93 Difference]: Finished difference Result 86 states and 106 transitions. [2020-12-23 00:26:16,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 00:26:16,562 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 45 [2020-12-23 00:26:16,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:26:16,563 INFO L225 Difference]: With dead ends: 86 [2020-12-23 00:26:16,563 INFO L226 Difference]: Without dead ends: 49 [2020-12-23 00:26:16,564 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-23 00:26:16,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-12-23 00:26:16,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2020-12-23 00:26:16,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-12-23 00:26:16,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 58 transitions. [2020-12-23 00:26:16,569 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 58 transitions. Word has length 45 [2020-12-23 00:26:16,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:26:16,569 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 58 transitions. [2020-12-23 00:26:16,569 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-23 00:26:16,569 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 58 transitions. [2020-12-23 00:26:16,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-12-23 00:26:16,570 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:26:16,570 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:26:16,784 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:26:16,785 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:26:16,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:26:16,786 INFO L82 PathProgramCache]: Analyzing trace with hash -1220648899, now seen corresponding path program 5 times [2020-12-23 00:26:16,787 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:26:16,787 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097266630] [2020-12-23 00:26:16,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:26:16,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:26:16,885 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2020-12-23 00:26:16,886 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097266630] [2020-12-23 00:26:16,887 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [880468066] [2020-12-23 00:26:16,887 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 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:26:16,971 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-12-23 00:26:16,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:26:16,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-23 00:26:16,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:26:17,036 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2020-12-23 00:26:17,036 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:26:17,037 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 10 [2020-12-23 00:26:17,037 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385232584] [2020-12-23 00:26:17,037 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-23 00:26:17,038 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:26:17,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-23 00:26:17,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2020-12-23 00:26:17,039 INFO L87 Difference]: Start difference. First operand 48 states and 58 transitions. Second operand 10 states. [2020-12-23 00:26:17,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:26:17,079 INFO L93 Difference]: Finished difference Result 91 states and 112 transitions. [2020-12-23 00:26:17,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-23 00:26:17,080 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 47 [2020-12-23 00:26:17,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:26:17,081 INFO L225 Difference]: With dead ends: 91 [2020-12-23 00:26:17,081 INFO L226 Difference]: Without dead ends: 54 [2020-12-23 00:26:17,082 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2020-12-23 00:26:17,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-12-23 00:26:17,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 52. [2020-12-23 00:26:17,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-12-23 00:26:17,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 62 transitions. [2020-12-23 00:26:17,087 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 62 transitions. Word has length 47 [2020-12-23 00:26:17,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:26:17,087 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 62 transitions. [2020-12-23 00:26:17,087 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-23 00:26:17,087 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 62 transitions. [2020-12-23 00:26:17,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-12-23 00:26:17,088 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:26:17,088 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:26:17,295 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:26:17,296 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:26:17,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:26:17,297 INFO L82 PathProgramCache]: Analyzing trace with hash 1924928889, now seen corresponding path program 6 times [2020-12-23 00:26:17,298 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:26:17,298 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578467414] [2020-12-23 00:26:17,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:26:17,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:26:17,379 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-12-23 00:26:17,379 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578467414] [2020-12-23 00:26:17,379 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [494934097] [2020-12-23 00:26:17,379 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 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:26:17,547 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-12-23 00:26:17,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:26:17,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-23 00:26:17,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:26:17,627 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2020-12-23 00:26:17,628 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:26:17,628 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11 [2020-12-23 00:26:17,628 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511180180] [2020-12-23 00:26:17,628 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-23 00:26:17,629 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:26:17,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-23 00:26:17,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2020-12-23 00:26:17,630 INFO L87 Difference]: Start difference. First operand 52 states and 62 transitions. Second operand 11 states. [2020-12-23 00:26:17,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:26:17,706 INFO L93 Difference]: Finished difference Result 109 states and 138 transitions. [2020-12-23 00:26:17,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-23 00:26:17,706 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 51 [2020-12-23 00:26:17,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:26:17,707 INFO L225 Difference]: With dead ends: 109 [2020-12-23 00:26:17,707 INFO L226 Difference]: Without dead ends: 70 [2020-12-23 00:26:17,708 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2020-12-23 00:26:17,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-12-23 00:26:17,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 63. [2020-12-23 00:26:17,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-12-23 00:26:17,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 76 transitions. [2020-12-23 00:26:17,730 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 76 transitions. Word has length 51 [2020-12-23 00:26:17,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:26:17,731 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 76 transitions. [2020-12-23 00:26:17,731 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-23 00:26:17,731 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 76 transitions. [2020-12-23 00:26:17,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-12-23 00:26:17,732 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:26:17,732 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:26:17,932 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-12-23 00:26:17,936 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:26:17,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:26:17,937 INFO L82 PathProgramCache]: Analyzing trace with hash -715721766, now seen corresponding path program 7 times [2020-12-23 00:26:17,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:26:17,937 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759336358] [2020-12-23 00:26:17,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:26:18,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:26:18,094 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2020-12-23 00:26:18,094 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759336358] [2020-12-23 00:26:18,095 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1139485438] [2020-12-23 00:26:18,095 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:26:18,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:26:18,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-23 00:26:18,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:26:18,272 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2020-12-23 00:26:18,272 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:26:18,273 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-12-23 00:26:18,273 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399312028] [2020-12-23 00:26:18,274 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-23 00:26:18,274 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:26:18,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-23 00:26:18,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-12-23 00:26:18,275 INFO L87 Difference]: Start difference. First operand 63 states and 76 transitions. Second operand 10 states. [2020-12-23 00:26:18,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:26:18,308 INFO L93 Difference]: Finished difference Result 114 states and 140 transitions. [2020-12-23 00:26:18,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-23 00:26:18,309 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 62 [2020-12-23 00:26:18,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:26:18,310 INFO L225 Difference]: With dead ends: 114 [2020-12-23 00:26:18,310 INFO L226 Difference]: Without dead ends: 66 [2020-12-23 00:26:18,310 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-12-23 00:26:18,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-12-23 00:26:18,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 65. [2020-12-23 00:26:18,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-12-23 00:26:18,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 78 transitions. [2020-12-23 00:26:18,316 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 78 transitions. Word has length 62 [2020-12-23 00:26:18,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:26:18,316 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 78 transitions. [2020-12-23 00:26:18,316 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-23 00:26:18,317 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 78 transitions. [2020-12-23 00:26:18,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-23 00:26:18,317 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:26:18,318 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:26:18,530 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:26:18,531 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:26:18,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:26:18,532 INFO L82 PathProgramCache]: Analyzing trace with hash 699306332, now seen corresponding path program 8 times [2020-12-23 00:26:18,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:26:18,533 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626250945] [2020-12-23 00:26:18,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:26:18,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:26:18,657 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2020-12-23 00:26:18,657 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626250945] [2020-12-23 00:26:18,658 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1612076740] [2020-12-23 00:26:18,658 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:26:18,743 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 00:26:18,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:26:18,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-23 00:26:18,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:26:18,810 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2020-12-23 00:26:18,811 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:26:18,811 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-12-23 00:26:18,811 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377942466] [2020-12-23 00:26:18,812 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-23 00:26:18,812 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:26:18,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-23 00:26:18,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-23 00:26:18,813 INFO L87 Difference]: Start difference. First operand 65 states and 78 transitions. Second operand 11 states. [2020-12-23 00:26:18,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:26:18,861 INFO L93 Difference]: Finished difference Result 116 states and 142 transitions. [2020-12-23 00:26:18,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-23 00:26:18,862 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 64 [2020-12-23 00:26:18,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:26:18,863 INFO L225 Difference]: With dead ends: 116 [2020-12-23 00:26:18,863 INFO L226 Difference]: Without dead ends: 68 [2020-12-23 00:26:18,864 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-23 00:26:18,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-12-23 00:26:18,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 67. [2020-12-23 00:26:18,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-12-23 00:26:18,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 80 transitions. [2020-12-23 00:26:18,882 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 80 transitions. Word has length 64 [2020-12-23 00:26:18,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:26:18,885 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 80 transitions. [2020-12-23 00:26:18,885 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-23 00:26:18,885 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 80 transitions. [2020-12-23 00:26:18,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-23 00:26:18,886 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:26:18,887 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:26:19,088 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:26:19,088 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:26:19,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:26:19,089 INFO L82 PathProgramCache]: Analyzing trace with hash -963324322, now seen corresponding path program 9 times [2020-12-23 00:26:19,090 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:26:19,090 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65470208] [2020-12-23 00:26:19,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:26:19,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:26:19,208 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2020-12-23 00:26:19,209 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65470208] [2020-12-23 00:26:19,209 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [466130018] [2020-12-23 00:26:19,209 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 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:26:19,325 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-12-23 00:26:19,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:26:19,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-23 00:26:19,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:26:19,440 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2020-12-23 00:26:19,441 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:26:19,441 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 6] total 15 [2020-12-23 00:26:19,444 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242871770] [2020-12-23 00:26:19,444 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-23 00:26:19,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:26:19,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-23 00:26:19,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2020-12-23 00:26:19,445 INFO L87 Difference]: Start difference. First operand 67 states and 80 transitions. Second operand 15 states. [2020-12-23 00:26:19,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:26:19,577 INFO L93 Difference]: Finished difference Result 133 states and 168 transitions. [2020-12-23 00:26:19,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-23 00:26:19,577 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 66 [2020-12-23 00:26:19,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:26:19,578 INFO L225 Difference]: With dead ends: 133 [2020-12-23 00:26:19,579 INFO L226 Difference]: Without dead ends: 85 [2020-12-23 00:26:19,582 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2020-12-23 00:26:19,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-12-23 00:26:19,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 78. [2020-12-23 00:26:19,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-12-23 00:26:19,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 94 transitions. [2020-12-23 00:26:19,591 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 94 transitions. Word has length 66 [2020-12-23 00:26:19,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:26:19,591 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 94 transitions. [2020-12-23 00:26:19,591 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-23 00:26:19,591 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 94 transitions. [2020-12-23 00:26:19,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-12-23 00:26:19,592 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:26:19,592 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:26:19,806 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-12-23 00:26:19,807 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:26:19,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:26:19,808 INFO L82 PathProgramCache]: Analyzing trace with hash -1058409135, now seen corresponding path program 10 times [2020-12-23 00:26:19,808 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:26:19,809 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005197298] [2020-12-23 00:26:19,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:26:19,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:26:20,012 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2020-12-23 00:26:20,013 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005197298] [2020-12-23 00:26:20,013 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2132468089] [2020-12-23 00:26:20,013 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 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:26:20,145 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 00:26:20,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:26:20,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-23 00:26:20,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:26:20,242 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2020-12-23 00:26:20,242 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:26:20,242 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-12-23 00:26:20,243 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788085684] [2020-12-23 00:26:20,243 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-23 00:26:20,243 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:26:20,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-23 00:26:20,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-12-23 00:26:20,244 INFO L87 Difference]: Start difference. First operand 78 states and 94 transitions. Second operand 13 states. [2020-12-23 00:26:20,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:26:20,284 INFO L93 Difference]: Finished difference Result 138 states and 170 transitions. [2020-12-23 00:26:20,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-23 00:26:20,285 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 77 [2020-12-23 00:26:20,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:26:20,285 INFO L225 Difference]: With dead ends: 138 [2020-12-23 00:26:20,286 INFO L226 Difference]: Without dead ends: 81 [2020-12-23 00:26:20,286 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-12-23 00:26:20,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-12-23 00:26:20,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 80. [2020-12-23 00:26:20,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-12-23 00:26:20,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 96 transitions. [2020-12-23 00:26:20,290 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 96 transitions. Word has length 77 [2020-12-23 00:26:20,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:26:20,291 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 96 transitions. [2020-12-23 00:26:20,291 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-23 00:26:20,291 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 96 transitions. [2020-12-23 00:26:20,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-23 00:26:20,292 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:26:20,292 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:26:20,506 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-12-23 00:26:20,507 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:26:20,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:26:20,508 INFO L82 PathProgramCache]: Analyzing trace with hash 1423401871, now seen corresponding path program 11 times [2020-12-23 00:26:20,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:26:20,509 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175328244] [2020-12-23 00:26:20,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:26:20,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:26:20,645 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2020-12-23 00:26:20,646 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175328244] [2020-12-23 00:26:20,646 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1072367948] [2020-12-23 00:26:20,646 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 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:26:20,856 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2020-12-23 00:26:20,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:26:20,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-23 00:26:20,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:26:20,970 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2020-12-23 00:26:20,970 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:26:20,971 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 7] total 18 [2020-12-23 00:26:20,971 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923039502] [2020-12-23 00:26:20,971 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-23 00:26:20,971 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:26:20,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-23 00:26:20,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=208, Unknown=0, NotChecked=0, Total=306 [2020-12-23 00:26:20,972 INFO L87 Difference]: Start difference. First operand 80 states and 96 transitions. Second operand 18 states. [2020-12-23 00:26:21,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:26:21,124 INFO L93 Difference]: Finished difference Result 155 states and 196 transitions. [2020-12-23 00:26:21,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-23 00:26:21,124 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 79 [2020-12-23 00:26:21,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:26:21,125 INFO L225 Difference]: With dead ends: 155 [2020-12-23 00:26:21,125 INFO L226 Difference]: Without dead ends: 98 [2020-12-23 00:26:21,126 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=98, Invalid=208, Unknown=0, NotChecked=0, Total=306 [2020-12-23 00:26:21,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-12-23 00:26:21,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 91. [2020-12-23 00:26:21,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-12-23 00:26:21,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 110 transitions. [2020-12-23 00:26:21,130 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 110 transitions. Word has length 79 [2020-12-23 00:26:21,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:26:21,130 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 110 transitions. [2020-12-23 00:26:21,130 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-23 00:26:21,131 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 110 transitions. [2020-12-23 00:26:21,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-12-23 00:26:21,131 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:26:21,131 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 5, 5, 5, 5, 5, 5, 5, 5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:26:21,345 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-12-23 00:26:21,346 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:26:21,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:26:21,347 INFO L82 PathProgramCache]: Analyzing trace with hash 647910148, now seen corresponding path program 12 times [2020-12-23 00:26:21,347 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:26:21,348 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5496712] [2020-12-23 00:26:21,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:26:21,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:26:21,512 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2020-12-23 00:26:21,512 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5496712] [2020-12-23 00:26:21,512 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1101630480] [2020-12-23 00:26:21,512 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 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:26:21,840 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-12-23 00:26:21,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:26:21,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-23 00:26:21,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:26:21,980 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 226 trivial. 0 not checked. [2020-12-23 00:26:21,980 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:26:21,980 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 6] total 18 [2020-12-23 00:26:21,981 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74570744] [2020-12-23 00:26:21,981 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-23 00:26:21,981 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:26:21,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-23 00:26:21,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=201, Unknown=0, NotChecked=0, Total=306 [2020-12-23 00:26:21,982 INFO L87 Difference]: Start difference. First operand 91 states and 110 transitions. Second operand 18 states. [2020-12-23 00:26:22,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:26:22,069 INFO L93 Difference]: Finished difference Result 163 states and 202 transitions. [2020-12-23 00:26:22,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-23 00:26:22,070 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 90 [2020-12-23 00:26:22,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:26:22,071 INFO L225 Difference]: With dead ends: 163 [2020-12-23 00:26:22,071 INFO L226 Difference]: Without dead ends: 97 [2020-12-23 00:26:22,072 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=201, Unknown=0, NotChecked=0, Total=306 [2020-12-23 00:26:22,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-12-23 00:26:22,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 95. [2020-12-23 00:26:22,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-12-23 00:26:22,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 114 transitions. [2020-12-23 00:26:22,076 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 114 transitions. Word has length 90 [2020-12-23 00:26:22,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:26:22,076 INFO L481 AbstractCegarLoop]: Abstraction has 95 states and 114 transitions. [2020-12-23 00:26:22,077 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-23 00:26:22,077 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 114 transitions. [2020-12-23 00:26:22,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-12-23 00:26:22,077 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:26:22,077 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:26:22,290 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:26:22,291 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:26:22,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:26:22,292 INFO L82 PathProgramCache]: Analyzing trace with hash -1749882872, now seen corresponding path program 13 times [2020-12-23 00:26:22,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:26:22,293 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821465001] [2020-12-23 00:26:22,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:26:22,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:26:22,482 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2020-12-23 00:26:22,483 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821465001] [2020-12-23 00:26:22,483 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1279266285] [2020-12-23 00:26:22,483 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:26:22,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:26:22,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-23 00:26:22,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:26:22,679 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2020-12-23 00:26:22,680 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:26:22,680 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-12-23 00:26:22,681 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595852626] [2020-12-23 00:26:22,682 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-23 00:26:22,682 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:26:22,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-23 00:26:22,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-12-23 00:26:22,683 INFO L87 Difference]: Start difference. First operand 95 states and 114 transitions. Second operand 16 states. [2020-12-23 00:26:22,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:26:22,732 INFO L93 Difference]: Finished difference Result 166 states and 204 transitions. [2020-12-23 00:26:22,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-23 00:26:22,733 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 94 [2020-12-23 00:26:22,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:26:22,735 INFO L225 Difference]: With dead ends: 166 [2020-12-23 00:26:22,735 INFO L226 Difference]: Without dead ends: 98 [2020-12-23 00:26:22,736 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-12-23 00:26:22,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-12-23 00:26:22,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 97. [2020-12-23 00:26:22,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-12-23 00:26:22,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 116 transitions. [2020-12-23 00:26:22,748 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 116 transitions. Word has length 94 [2020-12-23 00:26:22,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:26:22,750 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 116 transitions. [2020-12-23 00:26:22,750 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-23 00:26:22,750 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 116 transitions. [2020-12-23 00:26:22,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-12-23 00:26:22,750 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:26:22,751 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:26:22,962 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-12-23 00:26:22,963 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:26:22,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:26:22,964 INFO L82 PathProgramCache]: Analyzing trace with hash 98827658, now seen corresponding path program 14 times [2020-12-23 00:26:22,964 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:26:22,965 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849434292] [2020-12-23 00:26:22,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:26:22,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:26:23,161 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2020-12-23 00:26:23,162 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849434292] [2020-12-23 00:26:23,162 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1161219262] [2020-12-23 00:26:23,162 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 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:26:23,277 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 00:26:23,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:26:23,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-23 00:26:23,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:26:23,403 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2020-12-23 00:26:23,403 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:26:23,403 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-12-23 00:26:23,404 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079832684] [2020-12-23 00:26:23,404 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-23 00:26:23,404 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:26:23,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-23 00:26:23,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-12-23 00:26:23,405 INFO L87 Difference]: Start difference. First operand 97 states and 116 transitions. Second operand 17 states. [2020-12-23 00:26:23,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:26:23,458 INFO L93 Difference]: Finished difference Result 168 states and 206 transitions. [2020-12-23 00:26:23,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-23 00:26:23,458 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 96 [2020-12-23 00:26:23,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:26:23,459 INFO L225 Difference]: With dead ends: 168 [2020-12-23 00:26:23,459 INFO L226 Difference]: Without dead ends: 100 [2020-12-23 00:26:23,460 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-12-23 00:26:23,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-12-23 00:26:23,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 99. [2020-12-23 00:26:23,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-12-23 00:26:23,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 118 transitions. [2020-12-23 00:26:23,465 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 118 transitions. Word has length 96 [2020-12-23 00:26:23,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:26:23,465 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 118 transitions. [2020-12-23 00:26:23,465 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-23 00:26:23,465 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 118 transitions. [2020-12-23 00:26:23,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-12-23 00:26:23,470 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:26:23,470 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:26:23,684 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-23 00:26:23,685 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:26:23,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:26:23,686 INFO L82 PathProgramCache]: Analyzing trace with hash -1406813556, now seen corresponding path program 15 times [2020-12-23 00:26:23,686 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:26:23,686 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386867591] [2020-12-23 00:26:23,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:26:23,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:26:23,880 INFO L134 CoverageAnalysis]: Checked inductivity of 317 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2020-12-23 00:26:23,880 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386867591] [2020-12-23 00:26:23,880 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [605776320] [2020-12-23 00:26:23,880 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 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:26:24,041 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-12-23 00:26:24,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:26:24,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-23 00:26:24,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:26:24,204 INFO L134 CoverageAnalysis]: Checked inductivity of 317 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2020-12-23 00:26:24,205 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:26:24,205 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 7] total 22 [2020-12-23 00:26:24,205 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985973862] [2020-12-23 00:26:24,207 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-23 00:26:24,207 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:26:24,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-23 00:26:24,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=306, Unknown=0, NotChecked=0, Total=462 [2020-12-23 00:26:24,208 INFO L87 Difference]: Start difference. First operand 99 states and 118 transitions. Second operand 22 states. [2020-12-23 00:26:24,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:26:24,291 INFO L93 Difference]: Finished difference Result 173 states and 212 transitions. [2020-12-23 00:26:24,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-23 00:26:24,292 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 98 [2020-12-23 00:26:24,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:26:24,293 INFO L225 Difference]: With dead ends: 173 [2020-12-23 00:26:24,293 INFO L226 Difference]: Without dead ends: 105 [2020-12-23 00:26:24,294 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=156, Invalid=306, Unknown=0, NotChecked=0, Total=462 [2020-12-23 00:26:24,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-12-23 00:26:24,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 103. [2020-12-23 00:26:24,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-12-23 00:26:24,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 122 transitions. [2020-12-23 00:26:24,299 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 122 transitions. Word has length 98 [2020-12-23 00:26:24,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:26:24,299 INFO L481 AbstractCegarLoop]: Abstraction has 103 states and 122 transitions. [2020-12-23 00:26:24,300 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-23 00:26:24,300 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 122 transitions. [2020-12-23 00:26:24,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-12-23 00:26:24,301 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:26:24,301 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:26:24,516 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:26:24,517 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:26:24,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:26:24,518 INFO L82 PathProgramCache]: Analyzing trace with hash 454650768, now seen corresponding path program 16 times [2020-12-23 00:26:24,518 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:26:24,518 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687753896] [2020-12-23 00:26:24,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:26:24,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:26:24,802 INFO L134 CoverageAnalysis]: Checked inductivity of 355 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2020-12-23 00:26:24,802 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687753896] [2020-12-23 00:26:24,802 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2099257301] [2020-12-23 00:26:24,802 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 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:26:24,944 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 00:26:24,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:26:24,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 349 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-23 00:26:24,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:26:25,076 INFO L134 CoverageAnalysis]: Checked inductivity of 355 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2020-12-23 00:26:25,076 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:26:25,076 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-12-23 00:26:25,076 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363182118] [2020-12-23 00:26:25,077 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-23 00:26:25,077 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:26:25,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-23 00:26:25,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2020-12-23 00:26:25,078 INFO L87 Difference]: Start difference. First operand 103 states and 122 transitions. Second operand 19 states. [2020-12-23 00:26:25,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:26:25,146 INFO L93 Difference]: Finished difference Result 176 states and 214 transitions. [2020-12-23 00:26:25,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-23 00:26:25,147 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 102 [2020-12-23 00:26:25,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:26:25,148 INFO L225 Difference]: With dead ends: 176 [2020-12-23 00:26:25,148 INFO L226 Difference]: Without dead ends: 106 [2020-12-23 00:26:25,148 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2020-12-23 00:26:25,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-12-23 00:26:25,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 105. [2020-12-23 00:26:25,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-12-23 00:26:25,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 124 transitions. [2020-12-23 00:26:25,153 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 124 transitions. Word has length 102 [2020-12-23 00:26:25,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:26:25,153 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 124 transitions. [2020-12-23 00:26:25,153 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-23 00:26:25,153 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 124 transitions. [2020-12-23 00:26:25,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-12-23 00:26:25,154 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:26:25,154 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:26:25,367 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:26:25,367 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:26:25,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:26:25,368 INFO L82 PathProgramCache]: Analyzing trace with hash -1339695342, now seen corresponding path program 17 times [2020-12-23 00:26:25,368 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:26:25,368 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906754935] [2020-12-23 00:26:25,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:26:25,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:26:25,632 INFO L134 CoverageAnalysis]: Checked inductivity of 386 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2020-12-23 00:26:25,633 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906754935] [2020-12-23 00:26:25,633 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2121415391] [2020-12-23 00:26:25,633 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 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:26:26,239 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2020-12-23 00:26:26,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:26:26,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-23 00:26:26,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:26:26,344 INFO L134 CoverageAnalysis]: Checked inductivity of 386 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2020-12-23 00:26:26,345 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:26:26,345 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-12-23 00:26:26,345 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633035025] [2020-12-23 00:26:26,347 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-23 00:26:26,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:26:26,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-23 00:26:26,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-12-23 00:26:26,348 INFO L87 Difference]: Start difference. First operand 105 states and 124 transitions. Second operand 20 states. [2020-12-23 00:26:26,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:26:26,417 INFO L93 Difference]: Finished difference Result 178 states and 216 transitions. [2020-12-23 00:26:26,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-23 00:26:26,418 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 104 [2020-12-23 00:26:26,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:26:26,418 INFO L225 Difference]: With dead ends: 178 [2020-12-23 00:26:26,418 INFO L226 Difference]: Without dead ends: 108 [2020-12-23 00:26:26,419 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-12-23 00:26:26,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-12-23 00:26:26,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 107. [2020-12-23 00:26:26,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-12-23 00:26:26,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 126 transitions. [2020-12-23 00:26:26,423 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 126 transitions. Word has length 104 [2020-12-23 00:26:26,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:26:26,423 INFO L481 AbstractCegarLoop]: Abstraction has 107 states and 126 transitions. [2020-12-23 00:26:26,423 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-23 00:26:26,423 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 126 transitions. [2020-12-23 00:26:26,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-12-23 00:26:26,424 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:26:26,424 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:26:26,637 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:26:26,638 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:26:26,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:26:26,639 INFO L82 PathProgramCache]: Analyzing trace with hash 870545940, now seen corresponding path program 18 times [2020-12-23 00:26:26,639 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:26:26,639 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662290229] [2020-12-23 00:26:26,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:26:26,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:26:26,891 INFO L134 CoverageAnalysis]: Checked inductivity of 419 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2020-12-23 00:26:26,891 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662290229] [2020-12-23 00:26:26,891 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1177922040] [2020-12-23 00:26:26,892 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 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:26:27,434 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2020-12-23 00:26:27,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:26:27,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-23 00:26:27,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:26:27,620 INFO L134 CoverageAnalysis]: Checked inductivity of 419 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 384 trivial. 0 not checked. [2020-12-23 00:26:27,620 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:26:27,620 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 8] total 26 [2020-12-23 00:26:27,620 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656832723] [2020-12-23 00:26:27,621 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-12-23 00:26:27,621 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:26:27,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-12-23 00:26:27,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=433, Unknown=0, NotChecked=0, Total=650 [2020-12-23 00:26:27,622 INFO L87 Difference]: Start difference. First operand 107 states and 126 transitions. Second operand 26 states. [2020-12-23 00:26:27,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:26:27,821 INFO L93 Difference]: Finished difference Result 195 states and 242 transitions. [2020-12-23 00:26:27,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-12-23 00:26:27,821 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 106 [2020-12-23 00:26:27,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:26:27,822 INFO L225 Difference]: With dead ends: 195 [2020-12-23 00:26:27,822 INFO L226 Difference]: Without dead ends: 125 [2020-12-23 00:26:27,823 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=217, Invalid=433, Unknown=0, NotChecked=0, Total=650 [2020-12-23 00:26:27,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-12-23 00:26:27,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 118. [2020-12-23 00:26:27,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-12-23 00:26:27,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 140 transitions. [2020-12-23 00:26:27,827 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 140 transitions. Word has length 106 [2020-12-23 00:26:27,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:26:27,828 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 140 transitions. [2020-12-23 00:26:27,828 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-12-23 00:26:27,828 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 140 transitions. [2020-12-23 00:26:27,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-12-23 00:26:27,829 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:26:27,829 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:26:28,044 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-12-23 00:26:28,045 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:26:28,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:26:28,046 INFO L82 PathProgramCache]: Analyzing trace with hash -1113774245, now seen corresponding path program 19 times [2020-12-23 00:26:28,046 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:26:28,046 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832777796] [2020-12-23 00:26:28,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:26:28,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:26:28,336 INFO L134 CoverageAnalysis]: Checked inductivity of 502 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 178 trivial. 0 not checked. [2020-12-23 00:26:28,336 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832777796] [2020-12-23 00:26:28,336 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [380032567] [2020-12-23 00:26:28,337 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:26:28,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:26:28,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 394 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-23 00:26:28,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:26:28,585 INFO L134 CoverageAnalysis]: Checked inductivity of 502 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 178 trivial. 0 not checked. [2020-12-23 00:26:28,586 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:26:28,586 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-12-23 00:26:28,586 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190827730] [2020-12-23 00:26:28,586 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-23 00:26:28,586 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:26:28,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-23 00:26:28,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2020-12-23 00:26:28,587 INFO L87 Difference]: Start difference. First operand 118 states and 140 transitions. Second operand 22 states. [2020-12-23 00:26:28,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:26:28,659 INFO L93 Difference]: Finished difference Result 200 states and 244 transitions. [2020-12-23 00:26:28,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-23 00:26:28,659 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 117 [2020-12-23 00:26:28,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:26:28,660 INFO L225 Difference]: With dead ends: 200 [2020-12-23 00:26:28,660 INFO L226 Difference]: Without dead ends: 121 [2020-12-23 00:26:28,661 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2020-12-23 00:26:28,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-12-23 00:26:28,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 120. [2020-12-23 00:26:28,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-12-23 00:26:28,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 142 transitions. [2020-12-23 00:26:28,665 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 142 transitions. Word has length 117 [2020-12-23 00:26:28,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:26:28,666 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 142 transitions. [2020-12-23 00:26:28,666 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-23 00:26:28,666 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 142 transitions. [2020-12-23 00:26:28,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2020-12-23 00:26:28,667 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:26:28,667 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:26:28,881 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-12-23 00:26:28,881 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:26:28,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:26:28,882 INFO L82 PathProgramCache]: Analyzing trace with hash 30343065, now seen corresponding path program 20 times [2020-12-23 00:26:28,883 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:26:28,883 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924615506] [2020-12-23 00:26:28,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:26:28,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:26:29,224 INFO L134 CoverageAnalysis]: Checked inductivity of 539 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 178 trivial. 0 not checked. [2020-12-23 00:26:29,224 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924615506] [2020-12-23 00:26:29,224 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [31355958] [2020-12-23 00:26:29,225 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 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:26:29,370 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 00:26:29,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:26:29,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 400 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-23 00:26:29,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:26:29,508 INFO L134 CoverageAnalysis]: Checked inductivity of 539 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 178 trivial. 0 not checked. [2020-12-23 00:26:29,508 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:26:29,508 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-12-23 00:26:29,509 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667313099] [2020-12-23 00:26:29,509 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-12-23 00:26:29,509 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:26:29,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-12-23 00:26:29,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2020-12-23 00:26:29,510 INFO L87 Difference]: Start difference. First operand 120 states and 142 transitions. Second operand 23 states. [2020-12-23 00:26:29,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:26:29,582 INFO L93 Difference]: Finished difference Result 202 states and 246 transitions. [2020-12-23 00:26:29,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-23 00:26:29,583 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 119 [2020-12-23 00:26:29,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:26:29,584 INFO L225 Difference]: With dead ends: 202 [2020-12-23 00:26:29,584 INFO L226 Difference]: Without dead ends: 123 [2020-12-23 00:26:29,585 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2020-12-23 00:26:29,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-12-23 00:26:29,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 122. [2020-12-23 00:26:29,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-12-23 00:26:29,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 144 transitions. [2020-12-23 00:26:29,589 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 144 transitions. Word has length 119 [2020-12-23 00:26:29,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:26:29,589 INFO L481 AbstractCegarLoop]: Abstraction has 122 states and 144 transitions. [2020-12-23 00:26:29,589 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-12-23 00:26:29,590 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 144 transitions. [2020-12-23 00:26:29,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-12-23 00:26:29,591 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:26:29,591 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:26:29,805 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:26:29,806 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:26:29,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:26:29,807 INFO L82 PathProgramCache]: Analyzing trace with hash 15450199, now seen corresponding path program 21 times [2020-12-23 00:26:29,807 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:26:29,807 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979647194] [2020-12-23 00:26:29,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:26:29,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:26:30,121 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 178 trivial. 0 not checked. [2020-12-23 00:26:30,121 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979647194] [2020-12-23 00:26:30,121 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [71244088] [2020-12-23 00:26:30,122 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 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:26:30,471 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-12-23 00:26:30,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:26:30,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-23 00:26:30,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:26:30,700 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 553 trivial. 0 not checked. [2020-12-23 00:26:30,701 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:26:30,701 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 8] total 29 [2020-12-23 00:26:30,701 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511422893] [2020-12-23 00:26:30,701 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-12-23 00:26:30,701 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:26:30,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-12-23 00:26:30,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=532, Unknown=0, NotChecked=0, Total=812 [2020-12-23 00:26:30,702 INFO L87 Difference]: Start difference. First operand 122 states and 144 transitions. Second operand 29 states. [2020-12-23 00:26:30,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:26:30,845 INFO L93 Difference]: Finished difference Result 207 states and 252 transitions. [2020-12-23 00:26:30,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-12-23 00:26:30,846 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 121 [2020-12-23 00:26:30,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:26:30,848 INFO L225 Difference]: With dead ends: 207 [2020-12-23 00:26:30,848 INFO L226 Difference]: Without dead ends: 128 [2020-12-23 00:26:30,848 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=280, Invalid=532, Unknown=0, NotChecked=0, Total=812 [2020-12-23 00:26:30,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-12-23 00:26:30,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 126. [2020-12-23 00:26:30,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-12-23 00:26:30,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 148 transitions. [2020-12-23 00:26:30,853 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 148 transitions. Word has length 121 [2020-12-23 00:26:30,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:26:30,853 INFO L481 AbstractCegarLoop]: Abstraction has 126 states and 148 transitions. [2020-12-23 00:26:30,853 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-12-23 00:26:30,853 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 148 transitions. [2020-12-23 00:26:30,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2020-12-23 00:26:30,855 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:26:30,855 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:26:31,068 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-12-23 00:26:31,069 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:26:31,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:26:31,069 INFO L82 PathProgramCache]: Analyzing trace with hash 887235731, now seen corresponding path program 22 times [2020-12-23 00:26:31,070 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:26:31,070 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467641671] [2020-12-23 00:26:31,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:26:31,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:26:31,448 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 189 trivial. 0 not checked. [2020-12-23 00:26:31,448 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467641671] [2020-12-23 00:26:31,449 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [969812801] [2020-12-23 00:26:31,449 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 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:26:31,573 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 00:26:31,573 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:26:31,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 416 conjuncts, 23 conjunts are in the unsatisfiable core [2020-12-23 00:26:31,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:26:31,698 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 189 trivial. 0 not checked. [2020-12-23 00:26:31,698 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:26:31,698 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-12-23 00:26:31,698 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009904586] [2020-12-23 00:26:31,699 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-12-23 00:26:31,699 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:26:31,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-12-23 00:26:31,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2020-12-23 00:26:31,700 INFO L87 Difference]: Start difference. First operand 126 states and 148 transitions. Second operand 25 states. [2020-12-23 00:26:31,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:26:31,790 INFO L93 Difference]: Finished difference Result 210 states and 254 transitions. [2020-12-23 00:26:31,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-23 00:26:31,790 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 125 [2020-12-23 00:26:31,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:26:31,791 INFO L225 Difference]: With dead ends: 210 [2020-12-23 00:26:31,791 INFO L226 Difference]: Without dead ends: 129 [2020-12-23 00:26:31,792 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2020-12-23 00:26:31,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-12-23 00:26:31,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 128. [2020-12-23 00:26:31,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2020-12-23 00:26:31,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 150 transitions. [2020-12-23 00:26:31,797 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 150 transitions. Word has length 125 [2020-12-23 00:26:31,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:26:31,797 INFO L481 AbstractCegarLoop]: Abstraction has 128 states and 150 transitions. [2020-12-23 00:26:31,797 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-12-23 00:26:31,797 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 150 transitions. [2020-12-23 00:26:31,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-12-23 00:26:31,798 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:26:31,798 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:26:32,011 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:26:32,012 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:26:32,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:26:32,013 INFO L82 PathProgramCache]: Analyzing trace with hash 1582227153, now seen corresponding path program 23 times [2020-12-23 00:26:32,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:26:32,013 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057756132] [2020-12-23 00:26:32,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:26:32,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:26:32,430 INFO L134 CoverageAnalysis]: Checked inductivity of 673 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 189 trivial. 0 not checked. [2020-12-23 00:26:32,430 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057756132] [2020-12-23 00:26:32,430 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1982389138] [2020-12-23 00:26:32,430 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 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:26:33,788 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 23 check-sat command(s) [2020-12-23 00:26:33,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:26:33,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 422 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-23 00:26:33,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:26:34,043 INFO L134 CoverageAnalysis]: Checked inductivity of 673 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 622 trivial. 0 not checked. [2020-12-23 00:26:34,044 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:26:34,044 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 9] total 32 [2020-12-23 00:26:34,044 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969255290] [2020-12-23 00:26:34,044 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-12-23 00:26:34,044 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:26:34,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-12-23 00:26:34,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=335, Invalid=657, Unknown=0, NotChecked=0, Total=992 [2020-12-23 00:26:34,045 INFO L87 Difference]: Start difference. First operand 128 states and 150 transitions. Second operand 32 states. [2020-12-23 00:26:34,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:26:34,301 INFO L93 Difference]: Finished difference Result 227 states and 280 transitions. [2020-12-23 00:26:34,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-12-23 00:26:34,301 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 127 [2020-12-23 00:26:34,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:26:34,302 INFO L225 Difference]: With dead ends: 227 [2020-12-23 00:26:34,302 INFO L226 Difference]: Without dead ends: 146 [2020-12-23 00:26:34,303 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=335, Invalid=657, Unknown=0, NotChecked=0, Total=992 [2020-12-23 00:26:34,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-12-23 00:26:34,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 139. [2020-12-23 00:26:34,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-12-23 00:26:34,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 164 transitions. [2020-12-23 00:26:34,308 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 164 transitions. Word has length 127 [2020-12-23 00:26:34,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:26:34,309 INFO L481 AbstractCegarLoop]: Abstraction has 139 states and 164 transitions. [2020-12-23 00:26:34,309 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-12-23 00:26:34,309 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 164 transitions. [2020-12-23 00:26:34,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2020-12-23 00:26:34,310 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:26:34,310 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:26:34,525 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-12-23 00:26:34,526 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:26:34,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:26:34,527 INFO L82 PathProgramCache]: Analyzing trace with hash 1830905794, now seen corresponding path program 24 times [2020-12-23 00:26:34,527 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:26:34,527 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317754452] [2020-12-23 00:26:34,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:26:34,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:26:34,952 INFO L134 CoverageAnalysis]: Checked inductivity of 775 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 246 trivial. 0 not checked. [2020-12-23 00:26:34,952 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317754452] [2020-12-23 00:26:34,952 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1164502729] [2020-12-23 00:26:34,952 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 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:26:36,147 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-12-23 00:26:36,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:26:36,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 362 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-23 00:26:36,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:26:36,411 INFO L134 CoverageAnalysis]: Checked inductivity of 775 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 739 trivial. 0 not checked. [2020-12-23 00:26:36,412 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:26:36,412 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 9] total 33 [2020-12-23 00:26:36,412 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915812414] [2020-12-23 00:26:36,412 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-12-23 00:26:36,413 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:26:36,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-12-23 00:26:36,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=360, Invalid=696, Unknown=0, NotChecked=0, Total=1056 [2020-12-23 00:26:36,414 INFO L87 Difference]: Start difference. First operand 139 states and 164 transitions. Second operand 33 states. [2020-12-23 00:26:36,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:26:36,582 INFO L93 Difference]: Finished difference Result 235 states and 286 transitions. [2020-12-23 00:26:36,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-12-23 00:26:36,583 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 138 [2020-12-23 00:26:36,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:26:36,584 INFO L225 Difference]: With dead ends: 235 [2020-12-23 00:26:36,584 INFO L226 Difference]: Without dead ends: 145 [2020-12-23 00:26:36,584 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=360, Invalid=696, Unknown=0, NotChecked=0, Total=1056 [2020-12-23 00:26:36,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2020-12-23 00:26:36,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 143. [2020-12-23 00:26:36,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-12-23 00:26:36,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 168 transitions. [2020-12-23 00:26:36,589 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 168 transitions. Word has length 138 [2020-12-23 00:26:36,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:26:36,589 INFO L481 AbstractCegarLoop]: Abstraction has 143 states and 168 transitions. [2020-12-23 00:26:36,589 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-12-23 00:26:36,589 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 168 transitions. [2020-12-23 00:26:36,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2020-12-23 00:26:36,591 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:26:36,591 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:26:36,804 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-12-23 00:26:36,805 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:26:36,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:26:36,806 INFO L82 PathProgramCache]: Analyzing trace with hash -1631469626, now seen corresponding path program 25 times [2020-12-23 00:26:36,806 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:26:36,806 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753185814] [2020-12-23 00:26:36,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:26:36,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:26:37,271 INFO L134 CoverageAnalysis]: Checked inductivity of 835 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 259 trivial. 0 not checked. [2020-12-23 00:26:37,271 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753185814] [2020-12-23 00:26:37,271 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1208478863] [2020-12-23 00:26:37,271 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:26:37,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:26:37,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 26 conjunts are in the unsatisfiable core [2020-12-23 00:26:37,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:26:37,539 INFO L134 CoverageAnalysis]: Checked inductivity of 835 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 259 trivial. 0 not checked. [2020-12-23 00:26:37,539 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:26:37,539 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2020-12-23 00:26:37,539 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145556845] [2020-12-23 00:26:37,540 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-12-23 00:26:37,540 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:26:37,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-12-23 00:26:37,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2020-12-23 00:26:37,541 INFO L87 Difference]: Start difference. First operand 143 states and 168 transitions. Second operand 28 states. [2020-12-23 00:26:37,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:26:37,633 INFO L93 Difference]: Finished difference Result 238 states and 288 transitions. [2020-12-23 00:26:37,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-12-23 00:26:37,637 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 142 [2020-12-23 00:26:37,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:26:37,639 INFO L225 Difference]: With dead ends: 238 [2020-12-23 00:26:37,639 INFO L226 Difference]: Without dead ends: 146 [2020-12-23 00:26:37,641 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2020-12-23 00:26:37,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-12-23 00:26:37,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 145. [2020-12-23 00:26:37,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-12-23 00:26:37,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 170 transitions. [2020-12-23 00:26:37,646 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 170 transitions. Word has length 142 [2020-12-23 00:26:37,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:26:37,647 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 170 transitions. [2020-12-23 00:26:37,647 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-12-23 00:26:37,647 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 170 transitions. [2020-12-23 00:26:37,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2020-12-23 00:26:37,648 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:26:37,648 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:26:37,861 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-12-23 00:26:37,862 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:26:37,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:26:37,863 INFO L82 PathProgramCache]: Analyzing trace with hash -1804269240, now seen corresponding path program 26 times [2020-12-23 00:26:37,863 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:26:37,863 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501188221] [2020-12-23 00:26:37,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:26:37,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:26:38,354 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 259 trivial. 0 not checked. [2020-12-23 00:26:38,354 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501188221] [2020-12-23 00:26:38,354 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [154023875] [2020-12-23 00:26:38,355 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 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:26:38,487 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 00:26:38,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:26:38,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 471 conjuncts, 27 conjunts are in the unsatisfiable core [2020-12-23 00:26:38,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:26:38,641 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 259 trivial. 0 not checked. [2020-12-23 00:26:38,642 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:26:38,642 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2020-12-23 00:26:38,642 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052924895] [2020-12-23 00:26:38,642 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-12-23 00:26:38,643 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:26:38,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-12-23 00:26:38,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2020-12-23 00:26:38,643 INFO L87 Difference]: Start difference. First operand 145 states and 170 transitions. Second operand 29 states. [2020-12-23 00:26:38,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:26:38,739 INFO L93 Difference]: Finished difference Result 240 states and 290 transitions. [2020-12-23 00:26:38,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-12-23 00:26:38,739 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 144 [2020-12-23 00:26:38,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:26:38,741 INFO L225 Difference]: With dead ends: 240 [2020-12-23 00:26:38,741 INFO L226 Difference]: Without dead ends: 148 [2020-12-23 00:26:38,741 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2020-12-23 00:26:38,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-12-23 00:26:38,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 147. [2020-12-23 00:26:38,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-12-23 00:26:38,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 172 transitions. [2020-12-23 00:26:38,746 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 172 transitions. Word has length 144 [2020-12-23 00:26:38,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:26:38,746 INFO L481 AbstractCegarLoop]: Abstraction has 147 states and 172 transitions. [2020-12-23 00:26:38,747 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-12-23 00:26:38,747 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 172 transitions. [2020-12-23 00:26:38,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-12-23 00:26:38,748 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:26:38,748 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:26:38,963 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:26:38,964 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:26:38,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:26:38,965 INFO L82 PathProgramCache]: Analyzing trace with hash -360973750, now seen corresponding path program 27 times [2020-12-23 00:26:38,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:26:38,965 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153259461] [2020-12-23 00:26:38,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:26:39,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:26:39,460 INFO L134 CoverageAnalysis]: Checked inductivity of 935 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 259 trivial. 0 not checked. [2020-12-23 00:26:39,460 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153259461] [2020-12-23 00:26:39,460 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1165050970] [2020-12-23 00:26:39,460 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 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:26:40,115 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-12-23 00:26:40,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:26:40,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 363 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-23 00:26:40,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:26:40,412 INFO L134 CoverageAnalysis]: Checked inductivity of 935 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 865 trivial. 0 not checked. [2020-12-23 00:26:40,412 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:26:40,412 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 10] total 37 [2020-12-23 00:26:40,412 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833060706] [2020-12-23 00:26:40,413 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-12-23 00:26:40,413 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:26:40,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-12-23 00:26:40,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=450, Invalid=882, Unknown=0, NotChecked=0, Total=1332 [2020-12-23 00:26:40,414 INFO L87 Difference]: Start difference. First operand 147 states and 172 transitions. Second operand 37 states. [2020-12-23 00:26:40,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:26:40,687 INFO L93 Difference]: Finished difference Result 257 states and 316 transitions. [2020-12-23 00:26:40,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-12-23 00:26:40,687 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 146 [2020-12-23 00:26:40,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:26:40,688 INFO L225 Difference]: With dead ends: 257 [2020-12-23 00:26:40,688 INFO L226 Difference]: Without dead ends: 165 [2020-12-23 00:26:40,689 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=450, Invalid=882, Unknown=0, NotChecked=0, Total=1332 [2020-12-23 00:26:40,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2020-12-23 00:26:40,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 158. [2020-12-23 00:26:40,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2020-12-23 00:26:40,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 186 transitions. [2020-12-23 00:26:40,694 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 186 transitions. Word has length 146 [2020-12-23 00:26:40,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:26:40,694 INFO L481 AbstractCegarLoop]: Abstraction has 158 states and 186 transitions. [2020-12-23 00:26:40,694 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-12-23 00:26:40,695 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 186 transitions. [2020-12-23 00:26:40,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2020-12-23 00:26:40,695 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:26:40,696 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:26:40,908 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2020-12-23 00:26:40,909 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:26:40,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:26:40,910 INFO L82 PathProgramCache]: Analyzing trace with hash -766472987, now seen corresponding path program 28 times [2020-12-23 00:26:40,910 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:26:40,910 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624175490] [2020-12-23 00:26:40,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:26:40,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:26:41,440 INFO L134 CoverageAnalysis]: Checked inductivity of 1054 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2020-12-23 00:26:41,440 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624175490] [2020-12-23 00:26:41,440 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2026859326] [2020-12-23 00:26:41,441 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 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:26:41,594 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 00:26:41,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:26:41,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 510 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-23 00:26:41,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:26:41,951 INFO L134 CoverageAnalysis]: Checked inductivity of 1054 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 962 trivial. 0 not checked. [2020-12-23 00:26:41,951 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:26:41,952 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 11] total 39 [2020-12-23 00:26:41,952 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850087757] [2020-12-23 00:26:41,952 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-12-23 00:26:41,952 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:26:41,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-12-23 00:26:41,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=489, Invalid=993, Unknown=0, NotChecked=0, Total=1482 [2020-12-23 00:26:41,953 INFO L87 Difference]: Start difference. First operand 158 states and 186 transitions. Second operand 39 states. [2020-12-23 00:26:42,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:26:42,270 INFO L93 Difference]: Finished difference Result 277 states and 342 transitions. [2020-12-23 00:26:42,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-12-23 00:26:42,270 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 157 [2020-12-23 00:26:42,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:26:42,271 INFO L225 Difference]: With dead ends: 277 [2020-12-23 00:26:42,272 INFO L226 Difference]: Without dead ends: 176 [2020-12-23 00:26:42,274 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=489, Invalid=993, Unknown=0, NotChecked=0, Total=1482 [2020-12-23 00:26:42,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2020-12-23 00:26:42,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 169. [2020-12-23 00:26:42,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-12-23 00:26:42,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 200 transitions. [2020-12-23 00:26:42,280 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 200 transitions. Word has length 157 [2020-12-23 00:26:42,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:26:42,280 INFO L481 AbstractCegarLoop]: Abstraction has 169 states and 200 transitions. [2020-12-23 00:26:42,280 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-12-23 00:26:42,280 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 200 transitions. [2020-12-23 00:26:42,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2020-12-23 00:26:42,281 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:26:42,281 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 9, 9, 9, 9, 9, 9, 9, 9, 9, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:26:42,482 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:26:42,482 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:26:42,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:26:42,483 INFO L82 PathProgramCache]: Analyzing trace with hash -36456210, now seen corresponding path program 29 times [2020-12-23 00:26:42,483 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:26:42,483 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828799594] [2020-12-23 00:26:42,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:26:42,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:26:43,128 INFO L134 CoverageAnalysis]: Checked inductivity of 1184 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2020-12-23 00:26:43,129 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828799594] [2020-12-23 00:26:43,129 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1321680841] [2020-12-23 00:26:43,129 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 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:26:46,943 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 29 check-sat command(s) [2020-12-23 00:26:46,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:26:46,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 543 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-23 00:26:46,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:26:47,374 INFO L134 CoverageAnalysis]: Checked inductivity of 1184 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 1067 trivial. 0 not checked. [2020-12-23 00:26:47,374 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:26:47,375 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 12] total 41 [2020-12-23 00:26:47,375 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343173437] [2020-12-23 00:26:47,375 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-12-23 00:26:47,375 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:26:47,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-12-23 00:26:47,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=1110, Unknown=0, NotChecked=0, Total=1640 [2020-12-23 00:26:47,377 INFO L87 Difference]: Start difference. First operand 169 states and 200 transitions. Second operand 41 states. [2020-12-23 00:26:47,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:26:47,721 INFO L93 Difference]: Finished difference Result 297 states and 368 transitions. [2020-12-23 00:26:47,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-12-23 00:26:47,721 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 168 [2020-12-23 00:26:47,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:26:47,723 INFO L225 Difference]: With dead ends: 297 [2020-12-23 00:26:47,723 INFO L226 Difference]: Without dead ends: 187 [2020-12-23 00:26:47,724 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 280 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=530, Invalid=1110, Unknown=0, NotChecked=0, Total=1640 [2020-12-23 00:26:47,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2020-12-23 00:26:47,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 180. [2020-12-23 00:26:47,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2020-12-23 00:26:47,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 214 transitions. [2020-12-23 00:26:47,729 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 214 transitions. Word has length 168 [2020-12-23 00:26:47,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:26:47,729 INFO L481 AbstractCegarLoop]: Abstraction has 180 states and 214 transitions. [2020-12-23 00:26:47,730 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-12-23 00:26:47,730 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 214 transitions. [2020-12-23 00:26:47,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2020-12-23 00:26:47,731 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:26:47,731 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 10, 10, 10, 10, 10, 10, 10, 10, 10, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:26:47,946 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2020-12-23 00:26:47,947 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:26:47,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:26:47,947 INFO L82 PathProgramCache]: Analyzing trace with hash 1377034177, now seen corresponding path program 30 times [2020-12-23 00:26:47,948 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:26:47,948 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193031775] [2020-12-23 00:26:47,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:26:47,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:26:48,604 INFO L134 CoverageAnalysis]: Checked inductivity of 1325 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2020-12-23 00:26:48,604 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193031775] [2020-12-23 00:26:48,604 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [24421326] [2020-12-23 00:26:48,605 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 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:26:49,543 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2020-12-23 00:26:49,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:26:49,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 405 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-23 00:26:49,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:26:49,874 INFO L134 CoverageAnalysis]: Checked inductivity of 1325 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 1276 trivial. 0 not checked. [2020-12-23 00:26:49,874 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:26:49,874 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 10] total 40 [2020-12-23 00:26:49,874 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041820657] [2020-12-23 00:26:49,875 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-12-23 00:26:49,875 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:26:49,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-12-23 00:26:49,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=540, Invalid=1020, Unknown=0, NotChecked=0, Total=1560 [2020-12-23 00:26:49,876 INFO L87 Difference]: Start difference. First operand 180 states and 214 transitions. Second operand 40 states. [2020-12-23 00:26:50,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:26:50,056 INFO L93 Difference]: Finished difference Result 305 states and 374 transitions. [2020-12-23 00:26:50,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-12-23 00:26:50,057 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 179 [2020-12-23 00:26:50,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:26:50,058 INFO L225 Difference]: With dead ends: 305 [2020-12-23 00:26:50,058 INFO L226 Difference]: Without dead ends: 186 [2020-12-23 00:26:50,059 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=540, Invalid=1020, Unknown=0, NotChecked=0, Total=1560 [2020-12-23 00:26:50,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2020-12-23 00:26:50,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 184. [2020-12-23 00:26:50,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2020-12-23 00:26:50,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 218 transitions. [2020-12-23 00:26:50,064 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 218 transitions. Word has length 179 [2020-12-23 00:26:50,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:26:50,065 INFO L481 AbstractCegarLoop]: Abstraction has 184 states and 218 transitions. [2020-12-23 00:26:50,065 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-12-23 00:26:50,065 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 218 transitions. [2020-12-23 00:26:50,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2020-12-23 00:26:50,066 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:26:50,066 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 10, 10, 10, 10, 10, 10, 10, 10, 10, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:26:50,279 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2020-12-23 00:26:50,280 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:26:50,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:26:50,281 INFO L82 PathProgramCache]: Analyzing trace with hash -1181418755, now seen corresponding path program 31 times [2020-12-23 00:26:50,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:26:50,281 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059892379] [2020-12-23 00:26:50,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:26:50,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:26:50,974 INFO L134 CoverageAnalysis]: Checked inductivity of 1399 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 499 trivial. 0 not checked. [2020-12-23 00:26:50,974 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059892379] [2020-12-23 00:26:50,974 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [458025318] [2020-12-23 00:26:50,974 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:26:51,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:26:51,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 586 conjuncts, 32 conjunts are in the unsatisfiable core [2020-12-23 00:26:51,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:26:51,295 INFO L134 CoverageAnalysis]: Checked inductivity of 1399 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 499 trivial. 0 not checked. [2020-12-23 00:26:51,295 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:26:51,295 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2020-12-23 00:26:51,296 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006059941] [2020-12-23 00:26:51,296 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-12-23 00:26:51,296 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:26:51,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-12-23 00:26:51,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2020-12-23 00:26:51,297 INFO L87 Difference]: Start difference. First operand 184 states and 218 transitions. Second operand 34 states. [2020-12-23 00:26:51,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:26:51,430 INFO L93 Difference]: Finished difference Result 308 states and 376 transitions. [2020-12-23 00:26:51,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-12-23 00:26:51,431 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 183 [2020-12-23 00:26:51,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:26:51,432 INFO L225 Difference]: With dead ends: 308 [2020-12-23 00:26:51,432 INFO L226 Difference]: Without dead ends: 187 [2020-12-23 00:26:51,433 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 183 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2020-12-23 00:26:51,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2020-12-23 00:26:51,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 186. [2020-12-23 00:26:51,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2020-12-23 00:26:51,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 220 transitions. [2020-12-23 00:26:51,438 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 220 transitions. Word has length 183 [2020-12-23 00:26:51,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:26:51,438 INFO L481 AbstractCegarLoop]: Abstraction has 186 states and 220 transitions. [2020-12-23 00:26:51,439 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-12-23 00:26:51,439 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 220 transitions. [2020-12-23 00:26:51,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2020-12-23 00:26:51,440 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:26:51,440 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 10, 10, 10, 10, 10, 10, 10, 10, 10, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:26:51,653 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2020-12-23 00:26:51,654 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:26:51,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:26:51,655 INFO L82 PathProgramCache]: Analyzing trace with hash 650955707, now seen corresponding path program 32 times [2020-12-23 00:26:51,655 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:26:51,655 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980934101] [2020-12-23 00:26:51,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:26:51,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:26:52,370 INFO L134 CoverageAnalysis]: Checked inductivity of 1460 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 499 trivial. 0 not checked. [2020-12-23 00:26:52,371 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980934101] [2020-12-23 00:26:52,371 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [715658442] [2020-12-23 00:26:52,371 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:26:52,537 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 00:26:52,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:26:52,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 592 conjuncts, 33 conjunts are in the unsatisfiable core [2020-12-23 00:26:52,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:26:52,698 INFO L134 CoverageAnalysis]: Checked inductivity of 1460 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 499 trivial. 0 not checked. [2020-12-23 00:26:52,698 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:26:52,698 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2020-12-23 00:26:52,698 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821261615] [2020-12-23 00:26:52,699 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-12-23 00:26:52,699 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:26:52,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-12-23 00:26:52,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2020-12-23 00:26:52,700 INFO L87 Difference]: Start difference. First operand 186 states and 220 transitions. Second operand 35 states. [2020-12-23 00:26:52,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:26:52,838 INFO L93 Difference]: Finished difference Result 310 states and 378 transitions. [2020-12-23 00:26:52,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-12-23 00:26:52,839 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 185 [2020-12-23 00:26:52,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:26:52,840 INFO L225 Difference]: With dead ends: 310 [2020-12-23 00:26:52,840 INFO L226 Difference]: Without dead ends: 189 [2020-12-23 00:26:52,841 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2020-12-23 00:26:52,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2020-12-23 00:26:52,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 188. [2020-12-23 00:26:52,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 188 states. [2020-12-23 00:26:52,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 222 transitions. [2020-12-23 00:26:52,846 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 222 transitions. Word has length 185 [2020-12-23 00:26:52,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:26:52,847 INFO L481 AbstractCegarLoop]: Abstraction has 188 states and 222 transitions. [2020-12-23 00:26:52,847 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-12-23 00:26:52,847 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 222 transitions. [2020-12-23 00:26:52,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2020-12-23 00:26:52,848 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:26:52,848 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 10, 10, 10, 10, 10, 10, 10, 10, 10, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:26:53,062 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2020-12-23 00:26:53,063 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:26:53,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:26:53,064 INFO L82 PathProgramCache]: Analyzing trace with hash 626222329, now seen corresponding path program 33 times [2020-12-23 00:26:53,064 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:26:53,064 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506762156] [2020-12-23 00:26:53,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:26:53,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:26:53,791 INFO L134 CoverageAnalysis]: Checked inductivity of 1523 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 499 trivial. 0 not checked. [2020-12-23 00:26:53,792 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506762156] [2020-12-23 00:26:53,792 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1049418249] [2020-12-23 00:26:53,792 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 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:26:54,384 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-12-23 00:26:54,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:26:54,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 400 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-23 00:26:54,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:26:54,756 INFO L134 CoverageAnalysis]: Checked inductivity of 1523 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 1459 trivial. 0 not checked. [2020-12-23 00:26:54,756 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:26:54,756 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 11] total 44 [2020-12-23 00:26:54,757 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249799937] [2020-12-23 00:26:54,757 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-12-23 00:26:54,757 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:26:54,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-12-23 00:26:54,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=649, Invalid=1243, Unknown=0, NotChecked=0, Total=1892 [2020-12-23 00:26:54,759 INFO L87 Difference]: Start difference. First operand 188 states and 222 transitions. Second operand 44 states. [2020-12-23 00:26:54,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:26:54,985 INFO L93 Difference]: Finished difference Result 315 states and 384 transitions. [2020-12-23 00:26:54,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-12-23 00:26:54,985 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 187 [2020-12-23 00:26:54,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:26:54,987 INFO L225 Difference]: With dead ends: 315 [2020-12-23 00:26:54,987 INFO L226 Difference]: Without dead ends: 194 [2020-12-23 00:26:54,988 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 179 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 288 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=649, Invalid=1243, Unknown=0, NotChecked=0, Total=1892 [2020-12-23 00:26:54,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2020-12-23 00:26:54,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 192. [2020-12-23 00:26:54,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192 states. [2020-12-23 00:26:54,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 226 transitions. [2020-12-23 00:26:54,993 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 226 transitions. Word has length 187 [2020-12-23 00:26:54,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:26:54,993 INFO L481 AbstractCegarLoop]: Abstraction has 192 states and 226 transitions. [2020-12-23 00:26:54,993 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-12-23 00:26:54,993 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 226 transitions. [2020-12-23 00:26:54,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2020-12-23 00:26:54,994 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:26:54,994 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:26:55,195 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-12-23 00:26:55,195 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:26:55,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:26:55,196 INFO L82 PathProgramCache]: Analyzing trace with hash -667749323, now seen corresponding path program 34 times [2020-12-23 00:26:55,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:26:55,197 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589201247] [2020-12-23 00:26:55,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:26:55,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:26:55,956 INFO L134 CoverageAnalysis]: Checked inductivity of 1605 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 516 trivial. 0 not checked. [2020-12-23 00:26:55,956 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589201247] [2020-12-23 00:26:55,956 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1572080055] [2020-12-23 00:26:55,956 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 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:26:56,128 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 00:26:56,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:26:56,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 608 conjuncts, 35 conjunts are in the unsatisfiable core [2020-12-23 00:26:56,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:26:56,308 INFO L134 CoverageAnalysis]: Checked inductivity of 1605 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 516 trivial. 0 not checked. [2020-12-23 00:26:56,308 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:26:56,308 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2020-12-23 00:26:56,309 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857700874] [2020-12-23 00:26:56,309 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-12-23 00:26:56,309 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:26:56,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-12-23 00:26:56,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2020-12-23 00:26:56,310 INFO L87 Difference]: Start difference. First operand 192 states and 226 transitions. Second operand 37 states. [2020-12-23 00:26:56,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:26:56,439 INFO L93 Difference]: Finished difference Result 318 states and 386 transitions. [2020-12-23 00:26:56,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-12-23 00:26:56,440 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 191 [2020-12-23 00:26:56,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:26:56,442 INFO L225 Difference]: With dead ends: 318 [2020-12-23 00:26:56,442 INFO L226 Difference]: Without dead ends: 195 [2020-12-23 00:26:56,442 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 191 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2020-12-23 00:26:56,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2020-12-23 00:26:56,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 194. [2020-12-23 00:26:56,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 194 states. [2020-12-23 00:26:56,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 228 transitions. [2020-12-23 00:26:56,448 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 228 transitions. Word has length 191 [2020-12-23 00:26:56,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:26:56,448 INFO L481 AbstractCegarLoop]: Abstraction has 194 states and 228 transitions. [2020-12-23 00:26:56,448 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-12-23 00:26:56,448 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 228 transitions. [2020-12-23 00:26:56,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2020-12-23 00:26:56,449 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:26:56,450 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:26:56,664 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-12-23 00:26:56,665 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:26:56,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:26:56,665 INFO L82 PathProgramCache]: Analyzing trace with hash -1016781069, now seen corresponding path program 35 times [2020-12-23 00:26:56,666 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:26:56,666 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787883659] [2020-12-23 00:26:56,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:26:56,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:26:57,536 INFO L134 CoverageAnalysis]: Checked inductivity of 1672 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 516 trivial. 0 not checked. [2020-12-23 00:26:57,536 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787883659] [2020-12-23 00:26:57,536 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2044757314] [2020-12-23 00:26:57,537 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 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:27:55,144 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 35 check-sat command(s) [2020-12-23 00:27:55,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:27:55,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 614 conjuncts, 36 conjunts are in the unsatisfiable core [2020-12-23 00:27:55,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:27:55,406 INFO L134 CoverageAnalysis]: Checked inductivity of 1672 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 516 trivial. 0 not checked. [2020-12-23 00:27:55,407 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:27:55,407 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2020-12-23 00:27:55,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971425676] [2020-12-23 00:27:55,407 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-12-23 00:27:55,408 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:27:55,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-12-23 00:27:55,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2020-12-23 00:27:55,409 INFO L87 Difference]: Start difference. First operand 194 states and 228 transitions. Second operand 38 states. [2020-12-23 00:27:55,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:27:55,524 INFO L93 Difference]: Finished difference Result 320 states and 388 transitions. [2020-12-23 00:27:55,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-12-23 00:27:55,525 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 193 [2020-12-23 00:27:55,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:27:55,526 INFO L225 Difference]: With dead ends: 320 [2020-12-23 00:27:55,526 INFO L226 Difference]: Without dead ends: 197 [2020-12-23 00:27:55,527 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 193 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2020-12-23 00:27:55,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2020-12-23 00:27:55,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 196. [2020-12-23 00:27:55,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 196 states. [2020-12-23 00:27:55,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 230 transitions. [2020-12-23 00:27:55,533 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 230 transitions. Word has length 193 [2020-12-23 00:27:55,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:27:55,533 INFO L481 AbstractCegarLoop]: Abstraction has 196 states and 230 transitions. [2020-12-23 00:27:55,534 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-12-23 00:27:55,534 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 230 transitions. [2020-12-23 00:27:55,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2020-12-23 00:27:55,535 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:27:55,535 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:27:55,749 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-12-23 00:27:55,750 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:27:55,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:27:55,751 INFO L82 PathProgramCache]: Analyzing trace with hash -1428839887, now seen corresponding path program 36 times [2020-12-23 00:27:55,751 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:27:55,751 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18284395] [2020-12-23 00:27:55,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:27:55,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:27:56,670 INFO L134 CoverageAnalysis]: Checked inductivity of 1741 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 516 trivial. 0 not checked. [2020-12-23 00:27:56,670 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18284395] [2020-12-23 00:27:56,670 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [707018793] [2020-12-23 00:27:56,670 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 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:28:00,147 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2020-12-23 00:28:00,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:28:00,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 491 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-23 00:28:00,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:28:00,608 INFO L134 CoverageAnalysis]: Checked inductivity of 1741 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 1660 trivial. 0 not checked. [2020-12-23 00:28:00,608 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:28:00,608 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 12] total 48 [2020-12-23 00:28:00,609 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674928438] [2020-12-23 00:28:00,609 INFO L461 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-12-23 00:28:00,609 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:28:00,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-12-23 00:28:00,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=768, Invalid=1488, Unknown=0, NotChecked=0, Total=2256 [2020-12-23 00:28:00,611 INFO L87 Difference]: Start difference. First operand 196 states and 230 transitions. Second operand 48 states. [2020-12-23 00:28:00,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:28:00,806 INFO L93 Difference]: Finished difference Result 325 states and 394 transitions. [2020-12-23 00:28:00,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-12-23 00:28:00,807 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 195 [2020-12-23 00:28:00,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:28:00,808 INFO L225 Difference]: With dead ends: 325 [2020-12-23 00:28:00,808 INFO L226 Difference]: Without dead ends: 202 [2020-12-23 00:28:00,809 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=768, Invalid=1488, Unknown=0, NotChecked=0, Total=2256 [2020-12-23 00:28:00,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2020-12-23 00:28:00,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 200. [2020-12-23 00:28:00,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2020-12-23 00:28:00,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 234 transitions. [2020-12-23 00:28:00,815 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 234 transitions. Word has length 195 [2020-12-23 00:28:00,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:28:00,816 INFO L481 AbstractCegarLoop]: Abstraction has 200 states and 234 transitions. [2020-12-23 00:28:00,816 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-12-23 00:28:00,816 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 234 transitions. [2020-12-23 00:28:00,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2020-12-23 00:28:00,817 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:28:00,817 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:28:01,031 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-12-23 00:28:01,032 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:28:01,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:28:01,033 INFO L82 PathProgramCache]: Analyzing trace with hash -1018976915, now seen corresponding path program 37 times [2020-12-23 00:28:01,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:28:01,034 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807292004] [2020-12-23 00:28:01,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:28:01,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:28:01,943 INFO L134 CoverageAnalysis]: Checked inductivity of 1831 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 535 trivial. 0 not checked. [2020-12-23 00:28:01,944 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807292004] [2020-12-23 00:28:01,944 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [218210832] [2020-12-23 00:28:01,944 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:28:02,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:28:02,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 630 conjuncts, 38 conjunts are in the unsatisfiable core [2020-12-23 00:28:02,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:28:02,305 INFO L134 CoverageAnalysis]: Checked inductivity of 1831 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 535 trivial. 0 not checked. [2020-12-23 00:28:02,305 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:28:02,306 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 40 [2020-12-23 00:28:02,306 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424603788] [2020-12-23 00:28:02,306 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-12-23 00:28:02,306 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:28:02,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-12-23 00:28:02,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2020-12-23 00:28:02,307 INFO L87 Difference]: Start difference. First operand 200 states and 234 transitions. Second operand 40 states. [2020-12-23 00:28:02,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:28:02,470 INFO L93 Difference]: Finished difference Result 328 states and 396 transitions. [2020-12-23 00:28:02,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-12-23 00:28:02,472 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 199 [2020-12-23 00:28:02,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:28:02,473 INFO L225 Difference]: With dead ends: 328 [2020-12-23 00:28:02,473 INFO L226 Difference]: Without dead ends: 203 [2020-12-23 00:28:02,474 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 199 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2020-12-23 00:28:02,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2020-12-23 00:28:02,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 202. [2020-12-23 00:28:02,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 202 states. [2020-12-23 00:28:02,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 236 transitions. [2020-12-23 00:28:02,481 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 236 transitions. Word has length 199 [2020-12-23 00:28:02,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:28:02,481 INFO L481 AbstractCegarLoop]: Abstraction has 202 states and 236 transitions. [2020-12-23 00:28:02,481 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-12-23 00:28:02,481 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 236 transitions. [2020-12-23 00:28:02,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2020-12-23 00:28:02,482 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:28:02,483 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:28:02,696 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:28:02,697 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:28:02,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:28:02,698 INFO L82 PathProgramCache]: Analyzing trace with hash -991020501, now seen corresponding path program 38 times [2020-12-23 00:28:02,698 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:28:02,698 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080233776] [2020-12-23 00:28:02,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:28:02,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:28:03,699 INFO L134 CoverageAnalysis]: Checked inductivity of 1904 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 535 trivial. 0 not checked. [2020-12-23 00:28:03,699 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080233776] [2020-12-23 00:28:03,700 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [141257918] [2020-12-23 00:28:03,700 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 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:28:03,875 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 00:28:03,875 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:28:03,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 636 conjuncts, 39 conjunts are in the unsatisfiable core [2020-12-23 00:28:03,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:28:04,051 INFO L134 CoverageAnalysis]: Checked inductivity of 1904 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 535 trivial. 0 not checked. [2020-12-23 00:28:04,051 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:28:04,052 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 41 [2020-12-23 00:28:04,052 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981951746] [2020-12-23 00:28:04,052 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-12-23 00:28:04,052 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:28:04,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-12-23 00:28:04,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2020-12-23 00:28:04,054 INFO L87 Difference]: Start difference. First operand 202 states and 236 transitions. Second operand 41 states. [2020-12-23 00:28:04,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:28:04,188 INFO L93 Difference]: Finished difference Result 330 states and 398 transitions. [2020-12-23 00:28:04,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-12-23 00:28:04,189 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 201 [2020-12-23 00:28:04,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:28:04,190 INFO L225 Difference]: With dead ends: 330 [2020-12-23 00:28:04,191 INFO L226 Difference]: Without dead ends: 205 [2020-12-23 00:28:04,191 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 201 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2020-12-23 00:28:04,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2020-12-23 00:28:04,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 204. [2020-12-23 00:28:04,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204 states. [2020-12-23 00:28:04,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 238 transitions. [2020-12-23 00:28:04,197 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 238 transitions. Word has length 201 [2020-12-23 00:28:04,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:28:04,197 INFO L481 AbstractCegarLoop]: Abstraction has 204 states and 238 transitions. [2020-12-23 00:28:04,197 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-12-23 00:28:04,198 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 238 transitions. [2020-12-23 00:28:04,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2020-12-23 00:28:04,199 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:28:04,199 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:28:04,412 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:28:04,413 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:28:04,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:28:04,414 INFO L82 PathProgramCache]: Analyzing trace with hash 105289577, now seen corresponding path program 39 times [2020-12-23 00:28:04,414 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:28:04,414 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94309132] [2020-12-23 00:28:04,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:28:04,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:28:05,464 INFO L134 CoverageAnalysis]: Checked inductivity of 1979 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 535 trivial. 0 not checked. [2020-12-23 00:28:05,465 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94309132] [2020-12-23 00:28:05,465 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1263484403] [2020-12-23 00:28:05,465 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 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:28:06,295 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2020-12-23 00:28:06,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:28:06,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 474 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-23 00:28:06,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:28:06,835 INFO L134 CoverageAnalysis]: Checked inductivity of 1979 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 1834 trivial. 0 not checked. [2020-12-23 00:28:06,835 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:28:06,835 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 13] total 52 [2020-12-23 00:28:06,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12320265] [2020-12-23 00:28:06,836 INFO L461 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-12-23 00:28:06,836 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:28:06,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-12-23 00:28:06,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=897, Invalid=1755, Unknown=0, NotChecked=0, Total=2652 [2020-12-23 00:28:06,837 INFO L87 Difference]: Start difference. First operand 204 states and 238 transitions. Second operand 52 states. [2020-12-23 00:28:07,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:28:07,263 INFO L93 Difference]: Finished difference Result 347 states and 424 transitions. [2020-12-23 00:28:07,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-12-23 00:28:07,264 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 203 [2020-12-23 00:28:07,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:28:07,265 INFO L225 Difference]: With dead ends: 347 [2020-12-23 00:28:07,265 INFO L226 Difference]: Without dead ends: 222 [2020-12-23 00:28:07,267 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 193 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 418 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=897, Invalid=1755, Unknown=0, NotChecked=0, Total=2652 [2020-12-23 00:28:07,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2020-12-23 00:28:07,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 215. [2020-12-23 00:28:07,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 215 states. [2020-12-23 00:28:07,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 252 transitions. [2020-12-23 00:28:07,273 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 252 transitions. Word has length 203 [2020-12-23 00:28:07,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:28:07,273 INFO L481 AbstractCegarLoop]: Abstraction has 215 states and 252 transitions. [2020-12-23 00:28:07,273 INFO L482 AbstractCegarLoop]: Interpolant automaton has 52 states. [2020-12-23 00:28:07,274 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 252 transitions. [2020-12-23 00:28:07,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2020-12-23 00:28:07,275 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:28:07,275 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:28:07,488 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2020-12-23 00:28:07,488 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:28:07,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:28:07,489 INFO L82 PathProgramCache]: Analyzing trace with hash 766279978, now seen corresponding path program 40 times [2020-12-23 00:28:07,490 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:28:07,490 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31934240] [2020-12-23 00:28:07,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:28:07,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:28:08,554 INFO L134 CoverageAnalysis]: Checked inductivity of 2149 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 628 trivial. 0 not checked. [2020-12-23 00:28:08,555 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31934240] [2020-12-23 00:28:08,555 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [263970832] [2020-12-23 00:28:08,555 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 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:28:08,742 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 00:28:08,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:28:08,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 675 conjuncts, 41 conjunts are in the unsatisfiable core [2020-12-23 00:28:08,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:28:08,968 INFO L134 CoverageAnalysis]: Checked inductivity of 2149 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 628 trivial. 0 not checked. [2020-12-23 00:28:08,969 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:28:08,969 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 43 [2020-12-23 00:28:08,969 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715553683] [2020-12-23 00:28:08,969 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-12-23 00:28:08,970 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:28:08,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-12-23 00:28:08,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2020-12-23 00:28:08,971 INFO L87 Difference]: Start difference. First operand 215 states and 252 transitions. Second operand 43 states. [2020-12-23 00:28:09,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:28:09,146 INFO L93 Difference]: Finished difference Result 351 states and 425 transitions. [2020-12-23 00:28:09,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-12-23 00:28:09,147 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 214 [2020-12-23 00:28:09,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:28:09,148 INFO L225 Difference]: With dead ends: 351 [2020-12-23 00:28:09,148 INFO L226 Difference]: Without dead ends: 217 [2020-12-23 00:28:09,149 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 214 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2020-12-23 00:28:09,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2020-12-23 00:28:09,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 217. [2020-12-23 00:28:09,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 217 states. [2020-12-23 00:28:09,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 254 transitions. [2020-12-23 00:28:09,155 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 254 transitions. Word has length 214 [2020-12-23 00:28:09,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:28:09,155 INFO L481 AbstractCegarLoop]: Abstraction has 217 states and 254 transitions. [2020-12-23 00:28:09,155 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-12-23 00:28:09,155 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 254 transitions. [2020-12-23 00:28:09,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2020-12-23 00:28:09,156 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:28:09,156 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:28:09,369 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:28:09,370 INFO L429 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:28:09,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:28:09,371 INFO L82 PathProgramCache]: Analyzing trace with hash 558504108, now seen corresponding path program 41 times [2020-12-23 00:28:09,371 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:28:09,371 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378350607] [2020-12-23 00:28:09,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:28:09,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:28:09,579 INFO L134 CoverageAnalysis]: Checked inductivity of 2228 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 2052 trivial. 0 not checked. [2020-12-23 00:28:09,579 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378350607] [2020-12-23 00:28:09,580 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [41559500] [2020-12-23 00:28:09,580 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 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true